CN103126763A - High-frequency blade full-closed loop safety protection control system - Google Patents
High-frequency blade full-closed loop safety protection control system Download PDFInfo
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- CN103126763A CN103126763A CN2011103855830A CN201110385583A CN103126763A CN 103126763 A CN103126763 A CN 103126763A CN 2011103855830 A CN2011103855830 A CN 2011103855830A CN 201110385583 A CN201110385583 A CN 201110385583A CN 103126763 A CN103126763 A CN 103126763A
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Abstract
The invention provides a high-frequency blade full-closed loop safety protection control system which comprises a master controller module, an operation interface, an alarm module, a pulse width modulation (PWM) module, a digit-to-analog (D/A) output module, an analog-to-digit (A/D) sampling module, a relay control module, a pedal control module, an outage protection module and an isolation serial communication module. According to the high-frequency blade full-closed loop safety protection control system, the full-closed loop immediate feedback technology is adopted for automatic detection and adjustment of output voltage, and therefore the same effect is enabled to be generated on different human tissue, and safety and accuracy of output power of a high-frequency blade are improved.
Description
Technical field the present invention relates to a kind of high frequency cutter closed-loop safety protection control system.
Background technology high frequency electric knife (high frequency electro surgical unit) is a kind of electrosurgical unit that mechanical scalpel is organized cutting that replaces.When it contact with human body by the most advanced and sophisticated high-frequency high-voltage current that produces of active electrode, tissue is heated, realize the separation of when injected organism tissue and solidify, thereby playing the purpose of cutting and stopping blooding.The high frequency electric knife valuable product of domestic user's use at present, technology adopts open loop or semiclosed loop feedback technique to control the radio-frequency power output of high frequency cutter more, but the safety of power stage shortcoming, data processing work in complexity is slow, have influence on operation quality and operative speed, the personal safety that jeopardizes In surgery patient and doctor.Chinese patent CN200720076569.1 " double closed loops controlling system of high frequency electrotome " has described a kind of double closed loops controlling system of high frequency electrotome, acceptance is from two groups of setting signals of microprocessor, it includes Switching Power Supply, radio frequency power amplifier, output loop, the first error amplifier and the second error amplifier, two groups of setting signals that this two error amplifier is sent here sampled signal and the microprocessor of Switching Power Supply and output loop are respectively made comparisons and error is amplified, thereby two closed loop controls are carried out in output to high frequency electric knife, make it consistent with two groups of setting signal values, but this technology can't be checked whether safety of power stage, can't carry out the real-time adjusting of output to the output parameter that arranges, safety is still perfect not.
Summary of the invention
The above-mentioned deficiency that the objective of the invention is to solve provides a kind of high frequency cutter closed-loop safety protection control system.
Technical scheme
A kind of high frequency cutter closed-loop safety protection control system is characterized in that: have main controller module, operation interface, alarm module, the PWM module, D/A output module, A/D sampling module, relay control module, the pedal control module, power failure protection module, isolated serial port communication module;
Described main controller module is used for coordinating and controlling the work of modules, sampling section immediate feedback signal, and have Man Machine Interface;
Described operation interface comprises button, display lamp and LED charactron, is used for setting up human-computer interaction interface, shows work at present state and running parameter, and shows corresponding error code when makeing mistakes in system;
Described alarm module comprises buzzer and display lamp and LED charactron, is used for informing that various parameters arrange mistake, and sensor detects mistake, and the realtime power output error etc., and corresponding miscue code is arranged;
Described PWM module from the radio-frequency power output of controller output high frequency first-harmonic and master controller outgoing carrier co-controlling high frequency cutter, and is provided with the integral feedback signal for from the controller sampling at the PWM outfan, is used for implementing power ratio control output;
Described D/A output module is used for the real-time compare threshold of controlling the feedback signal under high frequency cutter work at present pattern and output from controller;
Described A/D sampling module, system adopts closed-loop immediate feedback technology, Inport And Outport Node at inverter all has feedback signal for the master-slave controller sampling, also be provided with the voltage and current feedback circuit at the radio-frequency power outfan, also has in addition the human body impedance feedback circuit for the master-slave controller sampling, system carries out variation control to output like this, has greatly improved safety and accuracy that radio frequency power output is controlled;
Described relay control module, the Closed control of relay depend on selected mode of operation and the output of setting, selectable switching relay are set to provide corresponding power to control and feedback signal according to different;
Described pedal control module comprises foot switch and isolation power supply circuits, and foot-operated module is used for regulating the increase of real-time output or reducing;
Described power failure protection module comprises that power supply detects and automatic switch-over circuit, and when system cut-off, the dual port RAM of control system part automatically switches to the 3V lithium battery power supply, protection work at present parameter;
Described isolated serial port communication module, the RS232 dataphone interface of system disposition band isolation.
Above-mentioned high frequency cutter safety protection control system, described high frequency cutter safety control system adopts closed-loop immediate feedback technology.
Above-mentioned high frequency cutter safety protection control system, described high frequency cutter safety protection control system also comprise: Commitment, Accounting and Management of Unit Supply module, system configuration 512kB Flash, 4kB dual port RAM and 8kB EEPROM.
Above-mentioned high frequency cutter safety protection control system, described high frequency cutter safety protection control system also comprise: the REM detection module.
Above-mentioned high frequency cutter safety protection control system, described REM detection module, whether identification patient circuit pole plate judges whether to exceed the safety value scope according to the contact resistance value of sampling, and gives a warning with the REM function.
Above-mentioned high frequency cutter safety protection control system, described closed-loop immediate feedback technology detects and regulation output voltage, makes different tissues produce same effect.
Above-mentioned high frequency cutter safety protection control system, described closed-loop immediate feedback technology, the adjusting pattern is based on selected mode of operation, power setting and human body impedance level.
Above-mentioned high frequency cutter safety protection control system, described mode of operation comprise single-stage, bipolar, only the cutting, coagulation mode.
Above-mentioned high frequency cutter safety protection control system, described high frequency cutter safety protection control system comprises the dosimetry ERROR ALGORITHM.
Above-mentioned high frequency cutter safety protection control system, described dosimetry ERROR ALGORITHM is at bipolar or the next closed loop dose error of cut mode algorithm; In the next open loop dosage of coagulation mode ERROR ALGORITHM.
The present invention compared with prior art has following advantages:
1, prior art adopts open loop or semiclosed loop feedback technique to control the radio-frequency power output of high frequency cutter more, by comparison, what the present invention adopted is the closed-loop feedback technology, be provided with a plurality of voltages, current sample point in power output part, and human body impedance is carried out sampling analysis, so that in operation process according to the variation of human body impedance, regulation output power, the safety that has improved greatly power stage.
2, the master-slave controller of control system adopts the communication of IDT71342 dual port RAM.Based on the master-slave controller communication of dual port RAM, two ports all have independently control signal wire, address wire and data wire, when the left and right port carries out read-write operation to different memory spaces, can carry out simultaneously the access of data; If when the same memory element in shared region is carried out storage operation simultaneously, IDT71342 completes the access rights arbitration automatically, is totally independent of master-slave controller.Master-slave controller Atmega1280+ dual port RAM control mode, the requirement that has solved well high frequency cutter use procedure high speed transfer of data can be completed complicated data processing work simultaneously, thereby take into account the needed large handling capacity of date processing and high speed.
3, the present invention has adopted dosimetry ERROR ALGORITHM and immediate feedback pid algorithm to combine aspect software control, and two kinds of algorithms all carry out the real-time adjusting of output based on selected mode of operation and the output parameter of setting.
4, system is with the REM detection module, and system identifies the patient circuit pole plate automatically whether with the REM function, and impedance detects to patient circuit, carries out rated output according to whether with the REM function and whether exports safety.
Description of drawings
Fig. 1 is high frequency cutter safety protection control system construction drawing.
Fig. 2 is high frequency cutter safety protection control systematic schematic diagram.
Fig. 3 is high frequency cutter output power flow chart.
The specific embodiment
Below in conjunction with accompanying drawing, embodiments of the present invention are further described.
See figures.1.and.2, high frequency cutter safety protection control system comprises main controller module, is used for coordinating and controlling the work of modules, sampling section immediate feedback signal, and have Man Machine Interface; From controller module, be used for controlling radio-frequency power output and the sampling immediate feedback signal of high frequency cutter; The dual port RAM module is used for the master-slave controller communication; Isolated serial port RS232 module is used for high frequency cutter and dataphone, convenient operation personnel on-line operation high frequency cutter.Master-slave controller adopts the Atmega1280 chip of Atmel company, and this chip has the characteristics such as speed is high, memory capacity large, aboundresources.
Master controller Atmega1280 is used for coordinating and controlling the work of modules, sampling section immediate feedback signal, and have Man Machine Interface and an isolated serial port communication module, by operation interface or computer, set work at present state and running parameter, and parameters is stored into the shared region of dual port RAM, for reading from controller.When system arranges mistake or System self-test when unsuccessful, buzzer begins song, shows error code in LED lamp and LED charactron, be used for informing that various parameters arrange mistake, sensor detects mistake, and the realtime power output error etc., and corresponding miscue code is arranged.
The PWM that radio-frequency power is exported controls, and the operating frequency of high frequency cutter and output wave number are by the PWM output high frequency first-harmonic from controller intervalometer 3, and the high frequency first-harmonic is that the PWM outgoing carrier control co-controlling of high frequency cutter operating frequency and master controller intervalometer 3 is completed; High frequency cutter output power adjusting circuit is by completing from the PWM output first-harmonic of controller intervalometer 1 and the PWM outgoing carrier co-controlling of master controller intervalometer 1.
Operation interface comprises display lamp, LED charactron and button and drive circuit, and is controlled by PD mouth, PJ5:2 and the PL mouth of master controller, and the pattern of finishing the work is switched and power setting, and the indication of various state and miscue etc.
System's serial communication module adopts the RS232 ADM3251E chip of band isolation, avoids producing and disturbs.Thereby guarantee not reduce high frequency cutter Security of the system in the situation that introduce in new loop.Serial communication module connects the USART0 of master-slave controller, when being used for the work of computer control high frequency cutter, realizing the upper and lower computer real-time communication, and is composed of corresponding communication identification code.
From controller Atmega1280 after master controller gives reset signal, bring into operation, read the Set For Current order from the dual port RAM shared region, after order is analyzed, enable D/A output and PWM output, open and close corresponding relay power stage and feedback signal grade are provided.The D/A output module adopts 4 tunnel output TLC7226 chips, exports by total line traffic control D/A from controller, is used for controlling in real time the compare threshold of the feedback signal under high frequency cutter work at present pattern and output.
A/D sampling module, master-slave controller Atmega1280 carry 16 tunnel 10 ADC modules, do not need to extend out adc circuit.System adopts closed-loop immediate feedback technology, Inport And Outport Node at inverter all has feedback signal for the master-slave controller sampling, be provided with the voltage and current feedback circuit at the radio-frequency power outfan, the current feedback signal of master controller sampled power outfan, electric current and voltage feedback signal from controller sampled power outfan, also have in addition the human body impedance feedback circuit for the master-slave controller sampling, sampled signal is as the foundation of dose error algorithm and the adjustment of immediate feedback pid algorithm.
The dual port RAM module adopts IDT71342 high-speed RAM chip, is divided into 3 memory blocks according to the 4kB space of the needs IDT71342 of system, and 1kB preserves the parameters such as work at present state, system's setting and false alarm as the master controller data field; 1kB preserves the parameters such as current power output state as from the controller data district; 2kB is used for the current real time operation parameter of access as the master-slave controller sharing data area, and master controller sends to be needed back the inspection data and need reported data all to be stored in this zone from controller.Based on the master-slave controller communication of dual port RAM, two ports all have independently control signal wire, address wire and data wire, are connected respectively to the bus port of master-slave controller Atmega1280.When the left and right port carries out read-write operation to different memory spaces, can carry out simultaneously the access of data; If when the same memory element in shared region is carried out storage operation simultaneously, IDT71342 completes the access rights arbitration automatically, is totally independent of master-slave controller, thereby guarantees that system power control needs effectiveness and the real-time of the data communication of feedback.
The pedal control module comprises foot switch and isolation power supply circuits.Adopt the isolation power supply, in order to prevent disturbing, thereby guarantee not reduce high frequency cutter Security of the system in the situation that introduce in new loop.Foot-operated module is used for regulating the increase of real-time output or reducing, and facilitates the doctor to regulate the output of high frequency cutter in operation process.
Power failure protection module comprises that power supply detects and automatic switch-over circuit, and the 3V lithium battery of backup power supply use consists of.When system cut-off, automatic switch-over circuit work, dual port RAM automatically switches to the 3V lithium battery power supply, protection work at present parameter.
High frequency cutter safety protection control system also comprises: the Commitment, Accounting and Management of Unit Supply module; system configuration 512kB Flash, 4kB dual port RAM and 8kB EEPROM are used for storage and control the work times of nearest 20 error codes that software, mode of operation setting and power parameter setting, high frequency cutter detect, every kind of pattern and working time, the mean power setting of every kind of mode of operation, net cycle time and other maintenance relevant informations of high frequency cutter.
In addition, system also has the REM monitoring function, patient circuit pole plate when the connecting band REM of system function, namely during the one pole cut mode: if when the contact resistance of surveying exceeds the safety criterion scope, generally lower than 5 ohm or higher than 135 ohm or exceed the initial measurement resistance 40% the time, system is as the criterion with the smaller, the REM alarm lamp reddens, buzzer sends chimes of doom twice, and radio-frequency power output simultaneously is under an embargo; REM reports to the police to indicate and will keep red always, produces the failure cause of reporting to the police until get rid of, and then display lamp turns green, and radio-frequency power is exported and recovered.When the patient circuit pole plate of system's connection without the REM safety detection function, namely during double pole mode: if when the contact resistance between patient circuit electrode bipod surveyed surpasses 20 ohm, the REM alarm lamp reddens, buzzer sends chimes of doom continuously twice, radio-frequency power output simultaneously is under an embargo, be excluded until produce the reason of fault, then alarm lamp extinguishes, and radio-frequency power output is enabled again.
In described high frequency cutter safety protection control system; at first master controller carries out the initialization of modules; after self check is completed; read last working status parameter in dual port RAM; and show at guidance panel; then settings when the mode of operation of acquiescence and output are task reset from controller, anti-locking system misoperation output radio-frequency power.
Adopted dosimetry ERROR ALGORITHM and immediate feedback pid algorithm to combine aspect software control, two kinds of algorithms all carry out the real-time adjusting of output based on selected mode of operation and the output parameter of setting.
Closed-loop immediate feedback technology detects and regulation output voltage automatically, makes different tissues produce same effect.This adjusting is based on selected mode of operation, can select single-stage, bipolar or only the cutting, coagulation mode, comprise power setting and human body impedance level, system arranges a plurality of power take-off sampled points, master-slave controller is sampled feedback signal simultaneously, realizes real closed loop control power stage; The dosimetry ERROR ALGORITHM depends on selected mode of operation.At bipolar or the next closed loop dose error of cut mode algorithm, master controller is when enabling radio-frequency power output from controller, the feedback signal that sampling is returned is as the actual output parameter of dosimetry ERROR ALGORITHM, and compare with the output parameter of expection, work from controller secure guaranteeing; In the next open loop dosage of coagulation mode ERROR ALGORITHM, judge based on the feedback signal sampling of inverter end whether radio-frequency power output exceeds safety value this moment.
The immediate feedback pid algorithm is a kind of closed loop mode algorithm, is applicable to bipolar and cut mode, is not suitable for coagulation mode.The immediate feedback pid algorithm increases from being shorted to open circuit according to human body impedance gradually based on the human body impedance feedback signal, adopts constant current, permanent power and constant voltage segmentation to control.Controlling the output maximum voltage is used for reducing Capacitance Coupled, reduces video interference and arc control.In the Low ESR situation, constant current can be protected output circuit; In the high impedance situation, constant voltage is controlled can limit electric arc and electromagnetic interference.According to power, the relation of voltage, electric current and impedance is calculated: P=I2R=V2/R, constant current, permanent power and constant voltage segmentation are controlled critical point and are determined by the experimental data curve match.
High frequency cutter output power flow process as shown in Figure 3.At first carry out System self-test, the self check content comprises calibration, speaker, display lamp and demonstration etc.Only be successfully completed self check and just can normally use, otherwise can output error power.If System self-test is unsuccessful, alarm can ring, and then error code of Display panel, fix a breakdown according to the error code prompting, and then start again is until be successfully completed self check.After self check is completed, select as required mode of operation and output is set, system switches to corresponding output according to above-mentioned setting and controls, monopolar mode or double pole mode use respectively different control algolithms, double pole mode: at first set bipolar parameter and comprise operating frequency and output etc., then detect whether the warning item is arranged, have to adjust and arrange, cancel until report to the police, just do not carry out next step judgement, if be operated in automatic mode, pressing or ride and step at button is that automatic output power is until the output time end; If be operated in manual mode, press or foot-operated step on just can output at button, until manually turn-off output.Palpus cycle detection REM loop, guarantee output safety in the power stage process.Monopolar mode: at first set the one pole parameter and comprise operating frequency and output etc., press or during foot-operated stepping at button, output until output time arrive, in the power stage process, need the cycle detection patient circuit to apply the flesh plate, adopt fuzzy control method to guarantee the safety of patient circuit.In sum, compounding practice panel or pedal or computer realize that real time operation pattern and output switch.In the power stage process, system is according to the concrete operation equation in feedback signal decision employing dose error algorithm and immediate feedback pid algorithm.
Obviously, those skilled in the art can carry out various changes and modification and not break away from the spirit and scope of the present invention high frequency cutter safety protection control of the present invention system.Like this, if within of the present invention these are revised and modification belongs to the scope of claim of the present invention and equivalent technologies thereof, the present invention also is intended to comprise these changes and modification interior.
Claims (10)
1. a high frequency cutter closed-loop safety protection control system, is characterized in that: have main controller module, operation interface, alarm module, the PWM module, D/A output module, A/D sampling module, relay control module, the pedal control module, power failure protection module, isolated serial port communication module;
Described main controller module is used for coordinating and controlling the work of modules, sampling section immediate feedback signal, and have Man Machine Interface;
Described operation interface comprises button, display lamp and LED charactron, is used for setting up human-computer interaction interface, shows work at present state and running parameter, and shows corresponding error code when makeing mistakes in system;
Described alarm module comprises buzzer and display lamp and LED charactron, is used for informing that various parameters arrange mistake, and sensor detects mistake, and the realtime power output error etc., and corresponding miscue code is arranged;
Described PWM module from the radio-frequency power output of controller output high frequency first-harmonic and master controller outgoing carrier co-controlling high frequency cutter, and is provided with the integral feedback signal for from the controller sampling at the PWM outfan, is used for implementing power ratio control output;
Described D/A output module is used for the real-time compare threshold of controlling the feedback signal under high frequency cutter work at present pattern and output from controller;
Described A/D sampling module, system adopts closed-loop immediate feedback technology, Inport And Outport Node at inverter all has feedback signal for the master-slave controller sampling, also be provided with the voltage and current feedback circuit at the radio-frequency power outfan, also has in addition the human body impedance feedback circuit for the master-slave controller sampling, system carries out variation control to output like this, has greatly improved safety and accuracy that radio frequency power output is controlled;
Described relay control module, the Closed control of relay depend on selected mode of operation and the output of setting, selectable switching relay are set to provide corresponding power to control and feedback signal according to different;
Described pedal control module comprises foot switch and isolation power supply circuits, and foot-operated module is used for regulating the increase of real-time output or reducing;
Described power failure protection module comprises that power supply detects and automatic switch-over circuit, and when system cut-off, the dual port RAM of control system part automatically switches to the 3V lithium battery power supply, protection work at present parameter; Described isolated serial port communication module, the RS232 dataphone interface of system disposition band isolation.
2. high frequency cutter safety protection control as claimed in claim 1 system, it is characterized in that: described high frequency cutter safety control system adopts closed-loop immediate feedback technology.
3. high frequency cutter safety protection control as claimed in claim 1 system is characterized in that: described high frequency cutter safety protection control system also comprises: Commitment, Accounting and Management of Unit Supply module, system configuration 512kB Flash, 4kB dual port RAM and 8kB EEPROM.
4. high frequency cutter safety protection control as claimed in claim 1 system is characterized in that: described high frequency cutter safety protection control system also comprises: the REM detection module.
5. high frequency cutter safety protection control as claimed in claim 4 system is characterized in that: whether described REM detection module, identification patient circuit pole plate with the REM function, judges whether to exceed the safety value scope according to the contact resistance value of sampling, and gives a warning.
6. high frequency cutter safety protection control as claimed in claim 2 system is characterized in that: described closed-loop immediate feedback technology, detect and regulation output voltage, and make different tissues produce same effect.
7. high frequency cutter safety protection control as claimed in claim 2 system, it is characterized in that: described closed-loop immediate feedback technology, the adjusting pattern is based on selected mode of operation, power setting and human body impedance level.
8. high frequency cutter safety protection control as claimed in claim 7 system is characterized in that: described mode of operation comprises single-stage, bipolar, only cutting, coagulation mode.
9. high frequency cutter safety protection control as claimed in claim 1 system is characterized in that: described high frequency cutter safety protection control system comprises the dosimetry ERROR ALGORITHM.
10. high frequency cutter safety protection control as claimed in claim 9 system is characterized in that: described dosimetry ERROR ALGORITHM, at bipolar or the next closed loop dose error of cut mode algorithm; In the next open loop dosage of coagulation mode ERROR ALGORITHM.
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| CN107518943A (en) * | 2016-06-22 | 2017-12-29 | 柯惠有限合伙公司 | For determining by the system and method for the state of fluid-cooled microwave ablation system |
| CN110824906A (en) * | 2019-11-28 | 2020-02-21 | 北京北广科技股份有限公司 | Rapid setting circuit based on fuzzy control strategy |
| WO2020135675A1 (en) * | 2018-12-27 | 2020-07-02 | 北京术锐技术有限公司 | High-frequency electric knife control system and control method thereof |
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Application publication date: 20130605 |