CN2590534Y - Detector for heart defibrillating device and defibrillating monitor - Google Patents

Abstract

The utility model relates to a detector for a cardiac defibrillator and a defibrillation monitor, which is mainly composed of special modules of a system coordination control module, a defibrillation energy high-precision rapid measuring module controlled by the system coordination control module, a module for producing various analog wave forms, an amplitude control module thereof, a synchronous defibrillation delay time measuring module, a cardiac pacing analyzing module, etc. The utility model is designed according to the principle of electromagnetic compatibility, and a computer multitask coordination control technology is used for controlling the operation of the detector, and thus, the utility model has the advantages of high reliability, powerful test function and flexible use. Because of the appearance and the popularization of the utility model, very effectual methods can be provided for the test and the whole life cycle management of the cardiac defibrillator and the defibrillation monitor, and great economic benefits, military benefits and social benefits can be produced.

Description

The checkout gear of cardiac defibrillator and defibrillation monitor

Technical field

This utility model relates to a kind of checkout gear of cardiac defibrillator, particularly about the checkout gear of a kind of cardiac defibrillator and defibrillation monitor.

Background technology

Cardiac defibrillator is the armarium that ARR patient is rescued and treats with electric defibrillation art (or electrical conversion art), clinically mainly with chamber property or supraventricular tachycardia, atrial flutter or the vibration of its treatment heart, ventricle quivers or heart beating stops fighting and the thoracic surgery cardiac operation under direct vision after the heart jump again.Understand the defibrillation effect for the ease of the doctor; many producers have also increased the cardiac monitoring function; constituted defibrillation monitor; portioned product has also increased the transcutaneous pacing Enhancement Technology; but percutaneous is implemented cardiac pacing, is used for pacing function impaired patients, chamber conduction function impaired patients and other critically ill patient's rescue.Because " electrical conversion art " time is of short duration, determined curative effect, side effect is little, international medical profession also generally believes, to quiver be rapid, the most effective means in the chamber of termination in this way, so up to now, cardiac defibrillator as indispensable emergency medical service, just extensively be equipped on intracardiac section, ICU, CCU, operating room, emergency room, emergency department, the rescue unit in battlefield, the cadre's sanitarium out-patient department of hospitals at different levels, even, also be equipped with this kind equipment at the needs of some medical research field for research.But it may be noted that: because the quality of defibrillation effect is relevant with energy size that imposes on the patient (by patient's body weight decision) and order of accuarcy, operator need hand defibrillation electrode during again owing to defibrillation, the high-voltage pulse of thousands of volts directly is added on patient's the heart (or chest), in the defibrillation process, also have other auxiliary electron armarium to work together in addition, this not only exists danger concerning the medical personnel of patient, implementation and operation, other equipment to linking to each other with the patient also can cause fault or infringement exactly.Thereby in the world this kind equipment is listed among the armarium of high application risk, and regulation must be through " strong inspection " qualified back, specifically use by the personnel of process special training.China's various big hospital at present in the cardiac defibrillator of usefulness basically all from external import, yet they are most self is not with energy meter, even indivedual models have " energy meter ", it can record is the voltage at charging capacitor two ends, by " defibrillation energy " of calculating only represented stored energy of electric capacity and the actual energy that discharges that certain difference is arranged, to such equipment, if just directly bringing use exists very big hidden danger really without calibrating.

Yet measurement verification standard and rules that present China had not both carried out the strict control of cycle life-cycle to this kind equipment do not have special-purpose checkout equipment yet.Western developed countries such as the U.S., Sweden, Japan are recognized the urgency and the seriousness of this class problem, some use standards have successively been formulated, and developed corresponding measurement verification equipment in view of the above, should provide some basic means for the measurement verification of cardiac defibrillation monitor really by these calibration equipments.But these equipment also exist the following defective really: can not realize still that 1, defibrillation waveform is carried out overall pulse parameter (comprising discharge pulse energy, crest value of impulse voltage, pulse current peak etc.) to be analyzed, also be unrealized the waveform of defibrillation pulse is stored or reappeared.2, the type of waveform of simulation generation is limited, and parameter variation range is discontinuous and scope is narrow partially, can not satisfy the needs that the monitor terminal unit carried out full test.3, when synchronous defibrillation, can't test the time delay of multiple discharge waveform, thereby be difficult to satisfy the needs that numerous models " cardiac defibrillation monitor " are tested, examined and determine.4, carry very not conveniently, use underaction.5, price comparison costliness has influenced its benefit performance in a sense.

Summary of the invention

The purpose of this utility model is exactly to change the present present situation of China as early as possible, overcomes some deficiency that existing device exists, and the checkout gear with following technical performance and serviceability is provided:

1, this device can carry out fast detecting and the analysis of overall pulse parameter to the discharge waveform of various model cardiac defibrillators, and can store and reappear described waveform;

2, this device can be simulated and be produced all accurate controlled multiple analogue signal of frequency, amplitude, comprise canonical function signal (sine wave, square wave, triangular wave), sinus rhythm signal and composite signal, to satisfy the needs that the electrocardiogram monitor performance is carried out full test, calibrating;

3, this device can be tested the synchronous defibrillation of multiple test waveform time delay, with the synchronous defibrillation capabilities of calibrating defibrillator;

4, this device can utilize software that different load impedances is set, and pacing frequency, pacemaker impulse amplitude and the width of transcutaneous pacing pulse, demand sensitivity, refractory period etc. are detected;

5, this device Electro Magnetic Compatibility is strong, energy operate as normal under multiple abominable electromagnetic interference environment;

6, this device reliability height is manipulated safety, convenient, flexible.

For achieving the above object, this utility model is by the following technical solutions: the checkout gear of a kind of cardiac defibrillator and defibrillation monitor, it is mainly by being the system coordination control module of core with special-purpose microcomputer system, be subjected to the defibrillation discharge pulse parameter high accuracy of its control to calculate fast and handle, multiple analog waveform produces and amplitude control, synchronous defibrillation delay time measurement, system-specific functional modules such as cardiac pacing analysis, supporting with it software module, and parts such as the cabinet of equipment and guidance panel are formed, on described guidance panel, on and off switch is installed, giant-screen alphanumeric display LCD, talk with the cubicle switch array that key switch F1-F5 forms by a mode control switch MODE and five personal-machines, defibrillator discharge input interface circuit, analog signal output interfaces such as ECG, cardiac pacing signal input connector etc., complete machine adopts Electro Magnetic Compatibility art designs and production, it is characterized in that:

Described special-purpose microcomputer system M01 mainly by the CMOS single-chip microcomputer and on its bus plug-in extended chip ROM, RAM, E ²PROM, LCD drive circuit, extensive FPGA gate array control circuit GAL, outside expansion bus, string and I/O expansion mouth etc. are formed, on described I/O expansion mouth and LCD drive circuit, be mounted with peripheral hardwares such as printer, network interface card and 8 * 40 giant-screen alphanumeric display LCD respectively, four kinds of accommodation function modules are articulated on the outside expansion bus of special-purpose microcomputer system, the chip selection signal that singlechip CPU produces by GAL is to all extended chip ROM/RAM/E ²Memorizeies such as PROM, string and I/O expansion mouth, peripheral hardware and described four kinds of special modules are controlled;

Described software module, comprise " system monitoring and integrated service program " and " system-specific functional module work control sequence ", described " system monitoring and integrated service program ", comprise that equipment self-inspection and start control subprogram, external interrupt are handled subprogram, the cubicle switch array is handled subprogram, the generation of man-machine interaction display interface and switching controls subprogram thereof etc., call these subprograms successively, can become 45 software switch to these 5 mechanical switchs of F1-F5 and come usefulness, corresponding to the different man-machine interaction display interfaces of 45 width of cloth; Described system-specific functional module work control sequence comprises that system works coordination control mastery routine, discharge pulse parameter measurement control subprogram, synchronous defibrillation delay time measurement subprogram, cardiac pacing analysis subroutine, internal interrupt subprogram etc. automatically with counting subroutine, multiple waveform modelling generation and amplitude closed loop; All calibrating functions of device are are all organized and coordinated down at special-purpose microcomputer system and supporting with it " system monitoring and integrated service program " and " system works coordination control mastery routine ", are coordinated mutually to finish jointly by each application specific hardware modules and supporting with it software;

The multitask timesharing control technology of " outside interrupt requests is handled immediately " is adopted in the coordination control of device, promptly by " system monitoring and the integrated service program " of special-purpose microcomputer system at any time the state to the cubicle switch array scan, according to its state and consequent interrupt priority level, call the correlator program in the described software module, finish the switching of man-machine dialog interface, and finish corresponding measurement verification function automatically.

Aforesaid defibrillation discharge pulse energy high accuracy fast detecting module mainly is made up of special-purpose microcomputer system, high-speed data acquistion system DAS and supporting with it softwares such as system process control mastery routine, discharge pulse measurement and energy counting subroutine; Defibrillator sparking electrode incoming end, discharge pulse input buffering interface circuit, resistance-type adjustable attenuator, calibration circuit, 12bit high-speed a/d changer that described high-speed data acquistion system DAS is mainly joined by cascade successively, and form with the working mode control circuit that the resistance-type adjustable attenuator joins; Described discharge pulse is measured with energy meter operator program and is comprised the control of defibrillation signal sampling, sampled data arrangement, voltage squared and subprograms such as calculating, the conversion of 2-10 system floating-point; Under the control of system process control mastery routine, call SPM1 and described subprogram successively, DAS gained data are carried out the processing and the calculating of pipeline system, can finish calculating, the analysis of overall pulse parameter and waveform storage to defibrillation energy.

Aforesaid multiple waveform modelling generation and amplitude control module, its function is that simulation produces all accurately controlled standard letters and cables signal of frequency, amplitude, standard heart rate/sinus rhythm emulation electrocardiosignal, combined sinewave signal etc., and its composition comprises that signal produces hardware circuit and waveform generation and amplitude control software; Described signal produces hardware circuit and comprises special-purpose micro computer unit, is articulated in the dual pathways D/A changer on its expansion bus, successively the I/V conversion amplifier of joining with the output cascade of its A channel D/A, bipolarity changer and and connect thereafter N double beneficial amplifier and resistance distribution network, at the extended chip E of described special-purpose microcomputer system ²The data of preserve separately corresponding software programs and analog waveform among PROM and the ROM; Described waveform generation and amplitude control software comprise the system process control mastery routine supporting with hardware, Wave data transmission control subprogram, D/A conversion rate control subprogram, amplitude control subprogram etc.; Amplitude control loop described here is made up of B passage, A/D changer and the single-chip microcomputer of two-way D/A changer, B passage D/A divides two-way output, one tunnel reference voltage input terminal that connects A channel D/A changer wherein, the input of another termination 10bitA/D changer, its dateout is connected on the data/address bus of single-chip microcomputer; Program control D/A converter technique is adopted in the generation of described each analog waveform, promptly install under the coordination control of system process control mastery routine, call, carry out described other waveform generation subprograms successively, and then successively selected waveform and control supplemental characteristic thereof are sent into A channel D/A changer generation respective waveforms, with the frequency that changes the method control waveform that produces that writes data speed in this passage D/A changer; The control of the amplitude of signal is adopted is the close-loop automatic adjustment technology, promptly finished jointly by analog regulation and digital regulated two loops; Analog regulation is basically by carrying out in the described hardware adjustments loop, and promptly it is with the output voltage V that changes B passage D/A changer _Bout(be the conversion reference voltage V of A channel D/A changer _Ref) realize, digital regulated then more is under the control of program, regulates the output V of B passage D/A changer with the way of digital closed-loop adjustment _BoutFinally reach stable simulation signal amplitude purpose.

Aforesaid synchronous defibrillation delay time measurement module, comprise hardware cell and delay time measurement software, described hardware cell mainly is made up of microcomputer system M01, the high-speed data acquistion system DAS that is arranged in module M1 and pulse timing width control device PWC, DAS chip selection signal is wherein provided by GAL, its data output end joins by bus and M01, and PWC is then begun to form with softwares such as timing end by internal counter and the supporting pulse-width controlled timing of M01; Described delay time measurement software comprises that internal interrupt control subprogram, clock pulses produce control subprogram, step-by-step counting intervalometer, and the timing length of this intervalometer is by M01 and corresponding software control.

Aforesaid cardiac pacing analysis module, it is mainly by working mode control circuit, the pacing signal input connector that joins of cascade successively, program control resistor network, amplifier, the A/D changer, form with microcomputer system M01 and supporting with it software, the A/D changer is articulated on the bus of M01, described software kit comprises that mainly the pace-making load impedance is selected and control, stimulus signal produces, subprograms such as pacemaker impulse test and refractory period test, under the coordination control of system's mastery routine, call described subprogram successively, not only can with the size that changes program control resistor network equivalent resistance, but also can finish the pacemaker impulse parameter, demand sensitivity, Measurement and analysis work such as refractory period, thereby the duty of understanding defibrillator transcutaneous pacing option;

The design of aforesaid complete machine is meant with realizing the employing electromagnetic compatibility technology: be coated with the overall structure of anti-electromagnetic interference coating in the instrument cabinet adopts, add the conductive seal circle between front panel and the cabinet and fix; Add isolating transformer and anti-interference filter between the AC-DC converter of device; To install the required integrated circuit of each functional circuit and other components and parts at first by the function grouping, and on three layers of pcb board of ground connection sealing coat, be shielded then; On the hardware of instrument, also be added with house dog, redundancy, software trap and other electromagnetic compatibility programmings are set in software.

This utility model is owing to take above technical scheme, compare with domestic and international same category of device, obviously have following advantage: 1, the topological structure of this utility model circuitry is more succinct, only use less relatively components and parts with software kit, just can realize all functions of four kinds of accommodation function modules, demonstrate fully and adopt software, hardware integration design superiority.2, this utility model has taken the lead in realizing really quick and precisely analyzing and the storage of waveform and recovery etc. each parameter of discharge waveform (comprising the energy of defibrillation pulse, the crest voltage/peak point current of discharge pulse) in this technical field.3, this utility model can be simulated and be produced frequency (or heart rate) and all variable various sinus rhythms/standard heart rate electrocardiosignal of amplitude, (cycle is different) combined sinewave signal and other test signal waveform (impulse wave, triangular wave, square wave etc.), it is that " complex wave " that 1Hz (3s)+5Hz (1s)+20Hz (1s)+25Hz (1s)+sine wave of 30Hz (1s) is formed adds to monitor that the testing person both can therefrom select by frequency, detect the frequency response of its terminal unit, also can be in the optional wherein a kind of waveform measurement of square wave time delay, choice criteria heart rate signal therefrom also, be used to test the time that the electrocardiogram monitor heart rate is reported to the police and taken place, can satisfy needs fully various different model electrocardiogram monitor calibratings.4, this utility model can also carry out check and analysis to pacing frequency, pacemaker impulse amplitude and the width of transcutaneous pacing pulse, demand sensitivity, refractory period etc., thereby provides a kind of means for the calibrating of cardiac defibrillator with cardiac pacing analytic function.5, this utility model is provided with software switch, and first device parts assembling is compact, does not disturb mutually between each element circuit, it is more succinct, portable that complete machine also seems, thereby not only make the human computer conversation convenient, manipulate very flexible, and its good stability, can be under abominable electromagnetic environment reliably working.6, this utility model production cost is lower, and " ratio of performance to price " is higher.In sum as can be seen: this utility model test item is many, the certainty of measurement height, multiple functional, the reliability height, easy to carry, manipulate flexibly, not only solved the urgent need in domestic, the army, but also can be with PC etc., the management information system that the quality of this kind equipment is monitored formed, its appearance will produce huge economic benefit, military benefit and social benefit in China with universal.

Description of drawings

Fig. 1 is that circuit of the present utility model is formed overall block-diagram;

Fig. 2 is that man-machine dialog interface of the present utility model generates and manipulate the method sketch map;

Fig. 3 is the principle schematic that human computer conversation's software switch of the present utility model forms;

Fig. 4 is the workflow diagram that this utility model is coordinated the control mastery routine;

Fig. 5 is the control sequence flow chart that this utility model defibrillation discharge pulse detects;

Fig. 6 is the program flow diagram of multiple analogue signal generating of this utility model and amplitude control thereof;

Fig. 7 is the flow chart of defibrillation delay time measurement program of the present utility model;

Fig. 8 is pace-making analysis process figure of the present utility model;

Fig. 9 is composition and the schematic layout pattern of this utility model operation control panel OFP.

The specific embodiment

As shown in Figure 1, this utility model is mainly by system coordination control module M0, defibrillation discharge pulse parameter high accuracy is calculated and four kinds of special modules such as processing module M1, multiple waveform modelling generation and amplitude control module M2, synchronous defibrillation delay time measurement module M3, cardiac pacing test module M4 fast, and parts such as the cabinet MB of equipment and guidance panel OFP are formed, wherein system coordination control module M0, four kinds of key components that special module M1, M2, M3, M4 are devices that controlled by M0, and system coordination control module M0 is the core of this device.As shown in Figure 9, this utility model is equipped with on and off switch PSW, 8X40 giant-screen alphanumeric display LCD, talks with cubicle switch array SWA, the defibrillator discharge input interface circuit P that key switch F1-F5 forms by a mode selection switch Mode and five personal-machines on guidance panel ₁//P ₂, standard ecg analog signal output interface J6, cardiac pacing analytic signal input connector J ₄₁-J ₄₂Deng.

System coordination control module M0 is made up of special-purpose microcomputer system M01 and supporting with it software module Msfw; M01 comprises CMOS single-chip microcomputer 1, expansion bus 2, and is articulated in extended chip ROM6, RAM5, E on the expansion bus 2 ²PROM7, LCD drive circuit 4, extensive FPGA gate array control circuit GAL3 and described " four kinds of application specific hardware modules " M1, M2, M3, M4, and string and I/O expansion mouth 8,9 etc., on string and I/O expansion mouth 8,9 and LCD drive circuit 4, be mounted with peripheral hardwares such as printer, network interface card and 8 * 40 giant-screen alphanumeric display LCD respectively; 1 couple of all extended chip ROM/RAM/E of single-chip microcomputer ²Memorizeies such as PROM, string and I/O expansion mouth and peripheral hardware, the control to " four kinds of application specific hardware modules " M1, M2, M3, M4 all produces chip selection signal by single-chip microcomputer 1 by GAL3 and carries out; Msfw comprises " system monitoring and integrated service program DP0 " and " system-specific functional module work control sequence MCP "; Wherein DP0 mainly comprises the self check and start control subprogram DP01 of equipment, external interrupt processing controls subprogram OICP, cubicle switch array information processing subprogram DP02, subprograms such as generation of man-machine interaction display interface and switching controls subprogram DP03 thereof, call these subprograms successively, can become 45 software switch to these 5 mechanical switchs of F1-F5 uses, a definite picture in all different with 45 width of cloth man-machine interaction display interfaces of each software switch is corresponding, thereby can have 45 kinds of selections to offer the personnel that manipulate of this equipment at least, bring great convenience to use.Described MCP comprises that being integrated in quick the calculating with processing subprogram SPM1, multiple waveform modelling generation and amplitude closed loop of its internal interrupt subprogram IICP, defibrillation discharge pulse parameter high accuracy under one's name controls subprogram SPM2, ad hoc sofeware programs such as synchronous defibrillation delay time measurement subprogram SPM3, heart transcutaneous pacing signal analysis subprogram SPM4 etc. automatically; All calibrating functions of installing (the quick calculating of high accuracy of the generation of the selection switching of man-machine dialog interface, various waveforms, discharge energy etc.) all are to reach under the organizing and coordinating of supporting with it software module Msfw at special-purpose microcomputer system M01, are coordinated mutually to finish jointly by each application specific hardware modules and supporting with it software; With regard to the control model that device adopts, temporarily can " to the instant multitask timesharing control technology of handling of outside interrupt requests " match, be that it is at first by at any time the state of cubicle switch array SWA being scanned with the supporting DP0 of M01, according to its state and consequent interrupt priority level, call correlator program (comprising SPM1-SPM4), just can finish the switching and the relevant detection task of man-machine dialog interface successively.

Because the application of " system monitoring and integrated service program DP0 " is very frequent, and has public property again, so earlier it is carried out simple declaration here.Below man-machine dialog interface is generated with (being that switch at the interface) method of manipulating of device and give simple declaration, as Fig. 2, shown in Figure 3, after on and off switch SW connects, the DP0 of Msfw at first calls DP01 device is carried out self check, display driver LCD, interruption, storehouse and other peripheral chips are provided with original state, after two seconds, LCD display is showed following start initial picture:

After the start initial picture occurs, this device will carry out the human computer conversation by " cubicle switch array SWA " and liquid crystal display LCD, carry out follow-up sequence of operations.By being undertaken by mode switch Mode and key switch F1-F5, thereby need at first give explanation with the generation of man-machine dialog interface.Concerning the generation and operation at interface, the state of SWA is that pico computer is concerned about most.After initial start-up picture produces, according to task, operator at first will be to mode switch Mode set, then to scan, generate " operational mode state word " to the state (promptly being in HI, LOW still is the PACE position) of Mode, and demonstrate the main menu of man-machine dialog interface by DP0 call subroutine OICP, DP02, DP03; Then continue the state of scanning F1-F5 and call subroutine OICP, DP02, DP03 one by one, just can generate so-called " key switch status word ", and the selection project that will test or examine and determine.After it may be noted that process OICP, DP02, DP03 subprogram are to the SWA state processing, F1-F5 has not been the mechanical key on the original meaning; In this utility model, having 9 width of cloth man machine interfaces needs to show all have five kinds of pictures to be selected by F1-F5 in every width of cloth interface,

Thereby have 5 * 9=45 picture and can select (as shown in Figure 2), in other words, because the participation of software only just can be selected 45 different pictures with 5 buttons, obviously these 5 mechanical keys have become typically " software function key ", and its function is greatly expanded.This not only makes the composition of equipment become very succinct, and is with many convenience to the human computer conversation.

As shown in Figure 3, following simple declaration is the generating principle of " key-press status word " once: after interface of main menu occurs, microprocessor will continue to inquire about the state of F1-F5, if there is key to press, P3.2 in the accompanying drawing 3 is a low level, and send interruption (" 0 " interrupt INT 0) to pico computer and ask, microprocessor is received and is just called external interrupt after this interrupt requests and handle subprogram OICP and interrupt handling, P5.2-P5.6 by parallel port 8255 reads in its state then, transferring to DP02 and DP03 proceeds to handle, can generate " key-press status word ", and show and the corresponding picture of button; Notice that just enter page 2 main menu if that press is F5 this moment, as what press is arbitrary other keys among the F1-F4, device has just entered other duties corresponding with picture (for example energy calculating, waveform generation etc.).Along with pressing of a certain key of F1-F5, just call the MCP primary control program immediately finishes desired task to Msfw, and demonstrates required result on the display of device.

As Fig. 1, Fig. 4, shown in Figure 5, the operation principle to " defibrillation discharge pulse parameter high accuracy is calculated and treating capacity module M1 fast " describes below.

Before point out: under the prerequisite of equipment reliable operation, impose on patient's defibrillation energy size and order of accuarcy thereof, will be directly connected to the defibrillation effect.Therefore, the energy indication of indicating accurately and can stand strict measurement verification all should be arranged on the various according to reason defibrillators, and employed clinically defibrillator front panel is provided with so-called " energy meter " actual indication is not to release energy, and just converts out storage power according to the voltage at storage capacitor two ends; Because in use the attenuation law of capacitance is difficult to detect, pass through " the nominal value C of capacitance ₀" direct substitution formula E=0.5C ₀U ²It is very big to calculate resulting energy error, if can not carry out periodic calibration to the energy that this class defibrillator discharges, all can bring higher application risk will certainly for the user of patient, instrument and other relevant equipment.For solving this contradiction, this utility model is provided with especially and can detects and parameter (comprising discharge pulse energy, peak value of pulse, maximum discharge current etc.) accurately measurement and the special module M1 that handles (storage, recovery etc.) fast the defibrillation discharge pulse.

M1 is mainly by being formed by hardware such as special-purpose microcomputer system M01, the high-speed data acquistion system DAS of core and supporting with it dedicated software modules SPM1 with single-chip microcomputer (1); Defibrillator sparking electrode incoming end P1, P2 that DAS is mainly joined by cascade successively, discharge pulse input buffering interface circuit 11, resistance-type adjustable attenuator 13, voltage ratio with calibration circuit 14,12bit high-speed a/d changer 15, and form with mode selection switch Mode that the resistance-type adjustable attenuator joins, discharge pulse input buffering interface circuit 11 is the pure resistances that are connected in parallel with P1, P2, the nominal value of resistance R is 50 Ω; Described discharge pulse is measured and energy counting subroutine SPM1, comprise that (its effect is 12 A/D changers among the control DAS to the control of defibrillation signal sampling with data compilation storage subroutine SPM11, sampling period by 100 μ s samples to discharge pulse, and control with sampled data high 4 with the least-significant byte preserve separately in two different bytes of RAM, sampling number is 1024), (its effect is by formula for voltage squared and counting subroutine SPM12 $E=\underset{0}{\overset{102\mathrm{ms}}{\∫}}{V}^2\mathrm{dt}/R=\underset{i=0}{\overset{1023}{\mathrm{\Σ}}}{V_i}^{2}100\mathrm{\μs}/50\mathrm{\Ω}$ With binary fixed point data calculating energy E), (its effect is earlier binary fixed point data to be converted into binary-floating-point data to 2-10 system floating-point conversion routine SPM13, and then binary-floating-point data is converted into 10 system floating datas, for showing or usefulness of printer output), discharge pulse voltage/current peak value determines that subprogram SPM14, discharge pulse waveform recover control subprogram SPM15 and system process operation and coordinate to control mastery routine MCP and form; After the LCD display of the special-purpose microcomputer system M01 that installs demonstrates interface of main menu, under the control of the control mastery routine MCP of system, call described subprogram SPM11-SPM15 successively, to carrying out the processing and the calculating of pipeline system, can finish defibrillation signal energy E, discharge pulse voltage/current maximum U by DAS gained discharge pulse sampled data _Max/ I _MaxCalculating so that the storage or the recovery of waveform; Introduce the method and the process of the calculating and the discharge pulse parameter measurement of defibrillation energy below in detail.

According to the electrotechnics principle, if the capacity of electric capacity is C, human body impedance R is a pure resistance, and establishes R=50 Ω; If the instantaneous value of discharge pulse voltage is V, to the sampling interval Δ t=100 μ s of discharge pulse, number of sampling is 1024, when numerical computations, then can be expressed as the energy storage of electric capacity: $E=\underset{0}{\overset{1023}{\∫}}{V}^2\mathrm{dt}/R=\underset{i=0}{\overset{1023}{\mathrm{\Σ}}}{V}_{i}100\mathrm{\μs}/50\mathrm{\Ω};$ Directly utilizing this formula to calculate has certain degree of difficulty in programming, thereby need adopt some skills, concrete grammar is: the A/D transformation result with 1024 sampled points is divided into high 4 earlier, least-significant byte, and be stored in the ram register with the form of nybble fixed binary, carry out following processing then successively: carry out square calculating of magnitude of voltage and to these 1024 voltage squared values summations (when meeting negative voltage with the operational rule of binary system fixed-point number, at first the form that the A/D transformation result of negative voltage is converted to complement code, 11 bit binary data after then will putting in order again carry out respectively suing for peace behind the square operation), fixed-point number is converted into the binary floating point number, and with this binary floating point number (it is by Hi divided by the decay system that is determined by adjustable attenuator, the circuit structure of Low range and attenuator and decide), at last the gained result is changed into the decimal scale floating number and shows and print.Conversion coefficient when being easy to calculate high and low range with following two formula formulas: $E_{\mathrm{HI}}=\underset{i=0}{\overset{1023}{\mathrm{\Σ}}}{V_i}^{2}100\mathrm{\μs}/50\mathrm{\Ω}=\underset{i=0}{\overset{1023}{\mathrm{\Σ}}}\frac{{(\frac{N_i}{2^{11}-1}\×5V\×1000)}^2\×100\×{10}^{-6}s}{50\mathrm{\Ω}}=\frac{\underset{i=0}{\overset{1023}{\mathrm{\Σ}}}{N}_i^2}{K_{\mathrm{HI}}}$ (height) $E_{\mathrm{LO}}=\underset{i=0}{\overset{1023}{\mathrm{\Σ}}}{V_i}^{2}100\mathrm{\μs}/50\mathrm{\Ω}=\underset{i=0}{\overset{1023}{\mathrm{\Σ}}}\frac{{(\frac{N_i}{2^{11}-1}\×5V\×200)}^2\×100\×{10}^{-6}s}{50\mathrm{\Ω}}=\frac{\underset{i=0}{\overset{1023}{\mathrm{\Σ}}}{N}_i^2}{K_{\mathrm{LO}}}$ (low)

K _HI=83886=(10100011110101110) ₂, change and turn to K after the floating-point binary _HI=11A3D7H (high byte is an exponent); K _LO=2097152=(1000000000000000000000) ₂, change and turn to K after the floating-point binary _LO=168000H (high byte is an exponent).

Here crest voltage, peak point current are calculated and the storage of discharge waveform is performed such: adopt " bubbling method " through three circulations, maximizing in 1024 sampled voltages is carried out intermediate value to three higher values then and is handled, and can obtain amplitude.To the storage of discharge waveform with recover to be performed such: under program SPM11, the SPM12 control, the original sampling data unloading that DAS is obtained is in E ²In the special-purpose conservation zone of RAM, when the needs waveform recovers,, send D/A changer, just be easy to original waveform is recovered out defibrillation discharge waveform data by waveform generation and recovery control sequence SPM15.

Point out in passing: after amplitude is obtained, also will deposit depositor to maximum sequence number (calculating required information time delay) in, prepare against the usefulness of computing relay time (owing in module M2, also introducing, so be omitted) subsequently here because in this position number, include.

As Fig. 1, Fig. 4, shown in Figure 6, operation principle and the process to described " multiple waveform modelling generation and amplitude control module M2 " describes below.The function of M2 is that simulation produces all accurately controlled standard letters and cables signal of frequency, amplitude, standard heart rate/sinus rhythm emulation electrocardiosignal, combined sinewave signal etc., and its composition comprises that many waveshape signals produce and amplitude control hardware M20 and supporting with it waveform generation and amplitude control software SPM2; Described M20 comprises waveform generation hardware circuit M201 and amplitude control hardware loop M202, M201 comprises special-purpose micro computer unit M01, be articulated in the dual pathways D/A changer 16 on its expansion bus, the I/V conversion amplifier 18 of joining with the output cascade of its A channel D/A successively, bipolarity changer 19 and and connect thereafter resistance distribution network 20 and the N beneficial amplifier 21 that doubles, M202 comprises by single-chip microcomputer 1, the amplitude control branch road I that two-way D/A changer 16 is formed and by single-chip microcomputer 1, the B passage of two-way D/A changer 16, the amplitude control branch road II that A/D changer 17 is formed, in amplitude control branch road I, the reference voltage Vbref input of the output voltage V bout of D/A changer 16B passage and the A channel of two-way D/A changer 16 joins, in amplitude control branch road II, the output voltage V bout of the B passage of two-way D/A changer 16 also will join with the input of A/D changer 17, and the output of A/D changer 17 is connected on the data/address bus of single-chip microcomputer 1; Described SPM2 is integrated in MCP special use control software under one's name, that include waveform generation control subprogram SPM21, signal amplitude control subprogram SPM22, the effect of SPM21 is the waveform that control simulation generation pattern, frequency meet the demands, and the effect of SPM22 then is an amplitude of controlling the signal that produces on request; The analog waveform that M2 can produce all is under the control of MCP, is finished jointly by software SPM2, IICP, DP0 and hardware M201; In this device, program control D/A converter technique is adopted in the generation of each analog waveform, and the close-loop automatic adjustment technology is adopted in the control of amplitude.Further introduce the method and the process of the generation and the amplitude control thereof of each analog waveform below.

The production method of each analog waveform is: at extended chip ROM6 and the E of M01 ²Among the PROM7, preserve separately and is comprised DP0, MCP and be under the jurisdiction of software " source program data " and " multiple analog waveform and the amplitude control data thereof " that its internal interrupt IICP, SPM1-SPM4 form.In the time will producing certain analog waveform, MCP calls subprograms such as IICP, SPM21, SPM22 one by one just according to the man-machine dialog interface content displayed, and under the control of these programs and hardware produce the waveform that shape, frequency meet the requirements together.For the generation of ECG waveform, be that the waveform of ECG ripple is divided into several sections (is the P ripple, the PR section, the QRS ripple, ST section etc., the subprogram and the waveform that produce these waveforms are of the same name, produce subprogram as the P ripple ... Deng) and give respectively to produce, and the variation of frequency control is identical with other waveforms, also is to insert suitable time-delay in the middle of conversion.Contradiction for fear of waveform generation and other functions takes place, device should be able to be made timely response to other task requests (showing the variation of key assignments) in output waveform, this task is handled subprogram OICP by external interrupt and is finished, and it can be judged at any time and has or not other external interrupt requests.

The close-loop automatic adjustment technology is adopted in the amplitude control of each analog waveform, and it is finished in both comprising I, two close-loop automatic adjustment loops of II M202; Described loop I is directly as the reference voltage Varef of A channel D/A changer the output voltage V bout of B passage D/A, described loop II is then under the control of program SPM22, conversion dateout and predefined amplitude control data to A/D changer 17 compare, upgrade original amplitude control variable with comparative result, signal is carried out circulating amplitude closed-loop adjustment, finally reach the purpose of stable simulation signal amplitude.Because loop I is according to the work of digital close loop negative feedback automatic principle of compensation, it is the output voltage V of B passage D/A changer _BoutConversion reference voltage V as A channel D/A changer _ArefRealize, fairly simple, so no longer superfluous chatting introduces the operation principle of loop II here.Loop H also is a digital close loop negative feedback self-regulating process, its loop mainly is made up of dual pathways D/A changer 16,10bitA/D changer 17, single-chip microcomputer 1 and signal amplitude control subprogram SPM24, its operation principle is: when the MCP control sequence is added to D/A changer 16, A/D changer 17 to the amplitude control data D1 of chip selection signal that is produced by GAL and setting, the D/A changer 16 of B passage just has aanalogvoltage output, is transformed to data D2 again behind this output voltage process A/D changer 17; Then, MCP calls the SPM22 subprogram again, in microcomputer system M01 data D1, D2 is compared; Suppose under the situation of oneself calibration, D1=D2 means that the amplitude of output analogue signal on the meaning of root-mean-square error △ ≯ 1% equates with predefined amplitude, so, the amplitude that output signal just is described when D2＞D1 is greater than in advance setting value, will reduce the control data of amplitude this moment, promptly use D1 ^*=D1-(D2-D1) replaces D1 (obvious D1 at this moment ^*＜D1).Like this, following two chain reactions just appear in the amplitude adjusted loop: 1, adjust in the loop aanalogvoltage V of the B passage of dual pathways D/A changer 16 output in simulation _BoutMust reduce, this causes the reference voltage V of A channel D/A again _RefReduce V _RefReduction must cause the reduction of the A channel amplitude output signal of dual pathways D/A changer 16, and this obviously is a close loop negative feedback adjustment process.2, in digital loop and since the setting value D1 reduce V _BoutMust reduce, it reduce will cause the data of A/D changer 17 output to diminish, in other words conj.or perhaps and the gap between the preset value D1 to diminish (be D1 ^*More near D1), reach the purpose that reduces error; If begin to have occurred D1 constantly from certain ^*The situation of=D1-(D2-D1)＜D1, the adjustment process of loop are then just in time opposite; This adjusting at any time, dynamically carry out, up to till making D1=D2 on the meaning of root-mean-square error △ ≯ 1%.

As Fig. 1, Fig. 4, shown in Figure 7, the operation principle of " the defibrillation delay time measurement module synchronously " M3 during below to synchronous defibrillation describes.When with defibrillation monitor the patient being implemented the monitoring of synchronous defibrillation, defibrillation pulse should be synchronous with patient's self R ripple; When defibrillation monitor is worked, whenever detect patient's self a R ripple on the monitor, a sync id (order t=0 this moment) will appear on the screen, and when defibrillator was implemented the defibrillation discharge, only occurring the R ripple just can have discharge pulse.So-called time delay, be meant from R wave impulse center the time when the discharge pulse peak value occurs.Described synchronous defibrillation delay time measurement module M3, comprise hardware cell M30 and delay time measurement software SPM3, described hardware cell M30 mainly is made up of microcomputer system M01, the high-speed data acquistion system DAS that is arranged in module M1 and pulse timing width control device PWC, DAS chip selection signal is wherein provided by GAL, its data output end joins by bus and M01, and PWC is then begun to form with softwares such as timing end by internal counter and the supporting pulse-width controlled timing of M01; Described delay time measurement software SPM3 comprise internal interrupt control subprogram IICP, clock pulses produce control subprogram SPM31, pulsimeter width control device SPM32 (its timing begins control signal and pushes away acquisition before by R ripple marking signal, timing finishing control signal by with the supporting discharge pulse crest voltage position judgment of module M1/determine that subprogram SPM14 provides) and time delay counting subroutine SPM33 etc.; Under the coordination control of MCP, call subprograms such as DP0, IICP, SPM31-SPM33 and SPM11, SPM14 successively, just can finish the defibrillation pulse calculating of time delay with described M30.

Now the concrete measuring process to the synchronization delay time is described as follows: make device at first operate by the human computer conversation, be placed on the state of outputting standard heart rate signal or sinus rhythm signal, MCP calls SPM3 by program, and then call IICP, SPM31, SPM32, each cycle is all picked up counting at R wave-wave peak (t=0ms) preceding 40ms (being t=-40ms), when device detects above threshold level (is signal voltage high level Hi 〉=100V that mode switch inserts, after the discharge signal of Low≤20V), the SPM11 that MCP just calls among the discharge pulse energy test calibrating subprogram SPM1 samples to discharge pulse, and determine the position that the discharge pulse peak value occurs by SPM14, and then the control signal that generation stops to count (is noted, the figure place of enumerator should guarantee maximum count, promptly do not overflow at R clocking internal period of wave), at last by SPM33 T by formula _d=T _c-40ms=N τ-40ms calculates (T time delay _cThe time of=N τ for being converted to) by enumerator meter value.Following sketch (vertical coordinate is a voltage, and abscissa is a time shaft) has provided calculating T _dThe corresponding time relationship of method, from then on figure can be to seeing clearlyer.

Can carry out as follows during practical operation: 1, pass through the human computer conversation, the standard heart rate signal (or sinus rhythm signal) of this device (cardiac defibrillator/defibrillation monitor checkout gear) being exported 120bpm is to tested defibrillation monitor, and defibrillation monitor is put synchronous regime (should have synchronous mark this moment).2, defibrillation monitor is charged at the 100J place.3, make defibrillation monitor pass through the discharge of this device, handle, on display lcd, promptly can read time delay through delay time measurement module (comprising hardware, software) M3.

SPM3 relates to waveform generation program, discharge pulse controlling of sampling program, voltage comparison program, discharge pulse peak value to determine program, postpones several programs such as timer control routine, and need call in-line interrupt service routine IICP, the program redirect is very complicated, relate to many judgements, workload is very big, but, obtained good effect by well-designed and debugging.

As Fig. 1, Fig. 2, shown in Figure 8, below cardiac pacing analysis module M4 is described.M4 mainly is made up of hardware circuit M41 and supporting with it software SPM4, wherein M41 is mainly by working mode control circuit Mode, the cardiac pacing signal input connector J41-J42, program control resistor network 22, the cascade amplifier A23 that join of cascade successively, (M1 is public with module) A/D converter 15, with microcomputer system M01, the output of described A/D converter 15 is articulated on the bus of M01; Described SPM4 comprises that the pace-making load impedance selects to give program (finish this network equivalent resistance with Mode, program control resistor network and then change the attenuation quotient of input signal), stimulus signal generation subprogram SPM42, pacemaker impulse test subroutine SPM43 and refractory period test subroutine SPM44 etc. with control SPM41.The work process that pace-making is analyzed is as follows: when working mode control circuit Mode being placed cardiac pacing analysis (Pacer) state, and decision when the electrocardiosignal of critical patient is analyzed, mastery routine MCP will call DP0, IICP, SPM4 successively and be positioned at its SPM41-SPM44 subprogram under one's name, to through J ₄₁-J ₄₂, program control resistor network 22, cascade amplifier A23, A/D converter 15 pretreated information carry out date processing, finish the analysis of estimating to pacemaker impulse parameter, demand sensitivity, refractory period etc., and change the equivalent resistance size of program control resistor network 22 and then the purpose of change attenuated input signal coefficient, make defibrillator be operated in optimum state.

Here also be pointed out that: the design of complete machine with realized employing digital technology and electromagnetic compatibility technology abundant.So-called " design of complete machine is fully adopted digital technology with realization " is meant: 1, whole work of complete machine are finished by microcomputer system control.2, the used circuit of M1-M3 all is large scale integrated circuit LSI (as the extensive gate array circuit of GAL, dual pathways D/A changer, ROM, RAM, I/O mouth etc.) basically.3, digital control technology is also adopted in the control of systemic-function and signal parameter, as amplitude control of analog waveform etc.; Described " electromagnetic compatibility technology is fully adopted in the realization of complete machine " is based on following consideration: because this checkout gear should carry out data collection and analysis up to the defibrillation pulse of thousands of volts to voltage, produce the test signal of voltage again in millivolt (mV) level, tens million of times of the power difference of two kinds of signals, it is particularly outstanding that the Electro Magnetic Compatibility of system and integrity problem just seem, solve as down not big strength, gently then systems soft ware can't normally move, even the deadlock phenomenon appears, heavy then may cause the instrument at all can't operate as normal.In order to improve the Electro Magnetic Compatibility of whole device, this utility model is mainly started with from design, and choosing of element, the design of circuit layout and installation up to establishment of software etc., are worked from a plurality of aspects, and the effect that facts have proved generation is extraordinary.Give explanation below respectively.

1, considers well shielding, crosstalk mutually avoiding.At first be to the components and parts on plate groupings, then the space of printed board cut apart that putting together on the same group given shielding to the space that frequent burst transmissions is arranged and the element group of poor anti jamming capability, guarantees that components and parts of each group do not disturb mutually; When structural design, also taked multiple shielding measure: add conductive gasket etc. as the inboard spraying of cabinet conductive coating, cabinet seam crossing, effectively prevented of the interference of this machine to other equipment.

2, analogue signal is separated ground connection with digital signal, promptly according to different supply voltages, digital circuit and analog circuit is provided with ground wire respectively.

3, adopt newer electromagnetic compatibility sex resistance element (as feedthrough capacitor, silicon transient voltage absorption diode or the like) to suppress the interference that exists in power line and the signal transmssion line; PCB adopts the three ply board design, wiring meticulously, and the intermediate layer is set to the ground connection aspect, guarantees that earth lead is the shortest; The power supply loop of different electrical power is avoided the coupling that interacts as far as possible, and the area of each current loop is reduced to minimum level as far as possible; At checkout gear signal turnover port, in power circuit, near the clock signal, between sensitive chip and the discharge loop, increase EMI element or the like.

4, device has adopted digital filtering and software game method, thereby has reduced the influence of system's random disturbances factor to sampled result when data acquisition and date processing.

5, system is provided with self check and fault diagnosis service routine, constantly loop test is carried out at the position (comprising or some internal storage location) that some is provided with special sign with this program during system works, with information storage in the assurance system, transmission, date processing and program reliability of operation.

6, in view of computer software at the importance aspect the reliability design, core cell single chip part at device has increased monitoring unit specially, promptly select for use MAX1232 (μ P monitoring chip) to serve as hardware watchdog, and the assurance of reset timing is provided, when program fleet, can automatically reset; Untapped interrupt vector district and bulk ROM space are provided with redundant instruction (promptly the redirect mouth in program adds redundant NOP instruction) and trap, to guarantee the reliability service of system.

7, fully adopted digital circuit and digital control technology, the complex logic circuit with extensive gate array circuit GAL replacement is made up of the discrete gate circuit realizes the logic control of CPU to complete machine, both simplifies the structure, and has also increased the motility and the reliability of control.

Owing to taked these technical measures, make this utility model both give full play to the advantage of digital technology, quantity, the kind of hardware, the weight and the volume of equipment have been reduced, saved cost, the equipment comparison exquisiteness that also seems, add and adopt multiple electromagnetic compatibility procedure, thereby reliability, especially its technical performance and serviceability all are greatly enhanced, thereby guaranteed that this utility model can both work reliably under the electromagnetic interference environment of very severe, be enough to competent needs various " cardiac defibrillator/defibrillation monitor " calibrating.

Claims (6)

1, the checkout gear of a kind of cardiac defibrillator and defibrillation monitor, it is mainly by being the system coordination control module of core with special-purpose microcomputer system, be subjected to the defibrillation energy high accuracy fast detecting of its control, multiple waveform modelling generation and amplitude control, synchronous defibrillation delay time measurement, cardiac pacing analytical system accommodation function module, supporting with it software module, and the cabinet of equipment and guidance panel are partly formed, on described guidance panel, on and off switch is installed, giant-screen alphanumeric display LCD, talk with the cubicle switch array that key switch F1 one F5 forms by a mode control switch MODE and five personal-machines, defibrillator discharge input interface circuit, the ECG analog signal output interface, the cardiac pacing signal input connector, complete machine adopts Electro Magnetic Compatibility art designs and production, it is characterized in that:

Described special-purpose microcomputer system M01 mainly by the CMOS single-chip microcomputer and on its bus plug-in extended chip ROM, RAM, E ²PROM, LCD drive circuit, extensive FPGA gate array control circuit GAL, outside expansion bus, string and I/O expansion mouth are formed, on described I/O expansion mouth and LCD drive circuit, be mounted with printer, network interface card and 8 * 40 giant-screen alphanumeric display LCD peripheral hardwares respectively, four kinds of accommodation function modules are articulated on the outside expansion bus of special-purpose microcomputer system, the chip selection signal that singlechip CPU produces by GAL is to all extended chip ROM/RAM/E ²Prom memory, string and I/O expansion mouth, peripheral hardware and described four kinds of special modules are controlled;

Described software module, comprise " system monitoring and integrated service program " and " system-specific functional module work control sequence ", described " system monitoring and integrated service program ", comprise that equipment self-inspection and start control subprogram, external interrupt processing subprogram, cubicle switch array are handled subprogram, the man-machine interaction display interface generates and the switching controls subprogram, call these subprograms successively, can become 45 software switch to these 5 mechanical switchs of F1-F5 and come usefulness, corresponding to the different man-machine interaction display interfaces of 45 width of cloth; Described system-specific functional module work control sequence comprises that system works coordination control mastery routine, discharge pulse parameter measurement control subprogram, synchronous defibrillation delay time measurement subprogram, cardiac pacing analysis subroutine, internal interrupt subprogram automatically with counting subroutine, multiple waveform modelling generation and amplitude closed loop; All calibrating functions of device are are all organized and coordinated down at special-purpose microcomputer system and supporting with it " system monitoring and integrated service program " and " system works coordination control mastery routine ", are coordinated mutually to finish jointly by each application specific hardware modules and supporting with it software;

The coordination of device is controlled to be the multitask timesharing control technology of " outside interrupt requests is handled immediately ", promptly by " system monitoring and the integrated service program " of special-purpose microcomputer system at any time the state to the cubicle switch array scan, according to its state and consequent interrupt priority level, call the correlator program in the described software module, finish the switching of man-machine dialog interface, and finish corresponding calibrating function automatically.

2, the checkout gear of cardiac defibrillator as claimed in claim 1 and defibrillation monitor, it is characterized in that: described defibrillation discharge pulse energy high-precision rapid survey module M1, mainly measured with energy counting subroutine SPM1 software and formed by special-purpose microcomputer system M01, high-speed data acquistion system DAS and supporting with it system-specific function operation control mastery routine MCP, discharge pulse; The defibrillator sparking electrode incoming end P that described high-speed data acquistion system DAS is mainly joined by cascade successively ₁-P ₂, discharge pulse input buffering interface circuit 11, resistance-type adjustable attenuator 13, voltage ratio with calibration circuit 14,12bit high-speed a/d changer 15, and form with mode selection switch Mode that the resistance-type adjustable attenuator joins; Described discharge pulse is measured with energy calculation procedure SPM1 and is comprised that program SPM11, voltage squared and counting subroutine SPM12,2-10 system floating-point conversion routine SPM13 are given in control of defibrillation signal sampling and data compilation storage, discharge pulse voltage/current peak value determines that subprogram SPM14, discharge pulse waveform recover control subprogram SPM15 and system-specific function operation control mastery routine MCP forms; Under the control of MCP, call SPM1 and described subprogram successively, DAS gained data are carried out the processing and the calculating of pipeline system, can finish calculating, the analysis of overall pulse parameter and waveform storage or recovery to the defibrillation signal energy;

3, the measuring and testing device of cardiac defibrillator as claimed in claim 1 and defibrillation electrocardiogram monitor, it is characterized in that: described multiple waveform modelling generation and amplitude control module M2, it mainly is made up of multiple waveform modelling generation and amplitude control hardware circuit M20 and supporting with it system-specific function control mastery routine MCP, waveform generation and amplitude control software SPM2; Described M20 comprises waveform generation hardware circuit M201 and amplitude control hardware loop M202, M201 comprises special-purpose micro computer unit M01, be articulated in the dual pathways D/A changer (16) on its expansion bus, the I/V conversion amplifier (18) of joining with the output cascade of its A channel D/A successively, bipolarity changer (19) and and connect thereafter resistance distribution network (20) and the N beneficial amplifier (21) that doubles, M202 comprises by single-chip microcomputer (1), the amplitude control branch road I that two-way D/A changer (16) is formed and by single-chip microcomputer (1), the B passage of two-way D/A changer (16), the amplitude control branch road II that A/D changer (17) is formed, in amplitude control branch road I, the reference voltage Vbref input of the output voltage V bout of D/A changer (16) B passage and D/A changer (16) A channel joins, in amplitude control branch road II, the output voltage V bout of D/A changer (16) B passage also will join with the input of A/D changer (17), and the output of A/D changer (17) is connected on the data/address bus of single-chip microcomputer (1); Described SPM2 is integrated in MCP special use control software under one's name, that include waveform generation control subprogram SPM21, signal amplitude control subprogram SPM22, the effect of SPM21 is the waveform that control simulation generation pattern, frequency meet the demands, and the effect of SPM22 then is an amplitude of controlling the signal that produces on request; The analog waveform that M2 can produce all is under the control of MCP, is finished jointly by software SPM2, IICP, DP0 and hardware M201;

Program control D/A converter technique is adopted in the generation of each analog waveform, at extended chip ROM (6) and the E of described M01 ²Among the PROM (7), preserve separately the data of all source program data of software module Msfw and each analog waveform; It is to call IICP, SPM2, man-machine interaction display interface selection control subprogram DP03 successively by MCP that the pattern of waveform produces with FREQUENCY CONTROL, Wave data is sent into A channel D/A changer with suitable speed, just can produce the analog waveform that waveform pattern and frequency meet the requirements;

The close-loop automatic adjustment technology is adopted in the control of the amplitude of each analog waveform, and it is finished both comprising that two close-loop automatic adjustment of I, II are changed among the M202 of road; Described loop I is directly as the reference voltage Varef of A channel D/A changer the output voltage V bout of B passage D/A, described loop II is then under the control of program SPM22, conversion dateout and predefined amplitude control data to A/D changer (17) compare, upgrade original amplitude control variable with comparative result, signal is carried out circulating amplitude closed-loop adjustment, finally reaches the purpose of stable simulation signal amplitude:

4, the checkout gear of cardiac defibrillator as claimed in claim 1 and defibrillation monitor, it is characterized in that: described synchronous defibrillation delay time measurement module M3, comprise hardware cell M30 and delay time measurement software SPM3, M30 mainly is made up of microcomputer system M01, the high-speed data acquistion system DAS that is arranged in module M1 and pulse timing width control device PWC, SPM3 mainly produces control subprogram SPM31, step-by-step counting intervalometer SPM32 by internal interrupt control subprogram IICP, clock pulses, and time delay, counting subroutine SPM33 formed; The chip selection signal of described DAS is provided by GAL, the data output end of its A/D changer joins by bus and M01, PWC then is made up of with being positioned at its clock internal impulse scaler, counting beginning control signal and stopping counting controling signal M01, wherein counting beginning control signal occurs during 40ms before R ripple marking signal, and stops counting controling signal by being included in discharge pulse crest voltage position judgment among the SPM1/determine that subprogram SPM14 determines; Under the coordination control of MCP, call DP0, IICP, SPM31-SPM33 and SPM11, SPM14 subprogram successively, just can finish the defibrillation pulse calculating of time delay with described M30.

5, the checkout gear of cardiac defibrillator as claimed in claim 1 and defibrillation monitor, it is characterized in that: described cardiac pacing analysis module M4 mainly is made up of hardware circuit M41 and supporting with it software SPM4, wherein M41 is mainly by working mode control circuit Mode, the cardiac pacing signal input connector J41-J42, program control resistor network (22), the cascade amplifier A (23) that join of cascade successively, A/D converter (15), with microcomputer system M01, the output of described A/D converter (15) is articulated on the bus of M01; Described SPM4 comprises that the pace-making load impedance selects to produce SPM42 with control SPM41, stimulus signal, pacemaker impulse is tested SPM43 and refractory period test SPM44 subprogram; Under the coordination control of MCP mastery routine, call DP0, IICP, SPM4 and subordinate's thereof SPM41 one SDPM44 successively, not only can change resistor network and imitate the size of resistance, but also can finish pacemaker impulse parameter, demand sensitivity, refractory period are estimated analytical work, make defibrillator be operated in optimum state;

6, the checkout gear of cardiac defibrillator as claimed in claim 1 and defibrillation monitor, it is characterized in that: the design of described complete machine is meant with realizing the employing electromagnetic compatibility technology, be coated with the overall structure of anti-electromagnetic interference coating in the instrument cabinet adopts, add the conductive seal circle between front panel and the cabinet and fix; Add isolating transformer and anti-interference filter between the AC-DC converter of device; To install the required integrated circuit of each functional circuit and other components and parts at first by the function grouping, and on three layers of pcb board of ground connection sealing coat, be shielded then; On the hardware of instrument, also be added with house dog, redundancy, software trap and other electromagnetic compatibility programmings are set in software.

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