CN100406852C - Multi-signal processing circuit, compund sensor and following detector thereof - Google Patents
Multi-signal processing circuit, compund sensor and following detector thereof Download PDFInfo
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- CN100406852C CN100406852C CN001059920A CN00105992A CN100406852C CN 100406852 C CN100406852 C CN 100406852C CN 001059920 A CN001059920 A CN 001059920A CN 00105992 A CN00105992 A CN 00105992A CN 100406852 C CN100406852 C CN 100406852C
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- 230000003750 conditioning effect Effects 0.000 claims abstract description 32
- 239000000758 substrate Substances 0.000 claims description 7
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 6
- 229910052710 silicon Inorganic materials 0.000 claims description 6
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Abstract
The present invention relates to a multi-signal conditioning circuit. J connection terminals which are correspondingly connected with the internal part are arranged on a circuit base board. An internal circuit is provided with a multi-signal superimposer and a voltage-current converter, wherein the multi-signal superimposer converts each original signal which is inputted into voltage, and magnifies and superposes the original signals, and a voltage signal is converted into a current signal to be outputted by the voltage-current converter. The internal circuit is connected with a subsequent circuit by a two-wire system to obtain a power supply and output. The present invention has the advantages that the supply voltage is low, the multi-signal original information is not lost, the frequency response for remote transmission is good, and the interference is resisted. The present invention is especially suitable for conditioning a signal of a compound sensor. A thick film circuit element is made, and the use effect is good. The present invention also relates to a corresponding compound sensor detector.
Description
Technical field
The present invention establishes and a kind of circuit that a plurality of electric signal are nursed one's health, and is particularly suitable for being applied to a plurality of signals such as voltage that each Sensitive Apparatus to compound sensor produces or electric current, electric charge, resistance and nurses one's health, and also establishes simultaneously and corresponding rearmounted detector.
Background technology
Modern detecting all will be nursed one's health raw electrical signal undoubtedly, as non-electrical quantity measurement technology, it at first is the electric signal due to changing by means of the responsive non-electric physical quantity of the Sensitive Apparatus in the non-electricity measure sensor, through related circuit the raw electrical signal of sensor sensing device output is made to output to after the corresponding conditioning subsequent conditioning circuit of detector, obtain required measurement result through relevant the processing again.
But existing non-electricity measure sensor, majority are the sensors of no built-in signal conditioner circuit.Because its weak output signal, signal quality is relatively poor, is subjected to the cable distribution parameter influence and is unsuitable for long-distance transmissions.When the needs long-distance transmissions, or when in the environment of strong industrial noise is arranged, using, more because of being subjected to external disturbance to cause the signal quality severe exacerbation, therefore, people utilize modern electronic technology, developed install at sensor internal, be used for the original signal of sensor is nursed one's health, amplified the signal conditioner of long-distance transmissions again, the piezoelectric acceleration sensor of the output voltage signal of making as countries such as the U.S., Denmark.Its built-in two-wire system electron-amplifier promptly is a kind of signal conditioner of one-parameter, voltage output.
One of signal conditioner shortcoming that the sensor is built-in is that the voltage value of supplying with conditioner is had relatively high expectations, and as 18V to 24V, makes most microminiaturized instruments design persons feel difficulty; Two of its shortcoming is that the output impedance of conditioner circuit is higher, and Zui Xiao about 100 Ω for example, the voltage signal of its output degenerate high frequency response because the influence of the distributed capacitance of transmission cable when teletransmission.
Be the anti-interference problem of solution teletransmission, the nearest integrated signal conditioner circuit of the monolithic that is used for acceleration transducer that occurs, as ADXL05, ADXL105, its built-in conditioner circuit degree of will speed up signal arrangement is exported for direct current (DC) voltage; ADXL202, ADXL210 then export vibration signal in PWM (fixed frequency pulse width modulated) mode.But such conditioning is an infidelity, has lost information such as a large amount of waveform of signal, frequency, makes follow-up instrument, computing machine can't utilize this signal to make vibration analysis, fault diagnosis.
For the defective of the voltage transmission mode poor anti jamming capability that solves signal conditioner with need the problem of higher supply voltage, the built-in electric current output type conditioner of sensor has appearred, as AD590 be exactly one with energy gap principle sensitive temperature, again temperature information is converted to electric current device output, that have the conditioner circuit; Conditioner as patent ZL96242733.0 described " super resonant mode sonic transducer " is exactly the conditioner circuit that the charge signal of pressure-sensitive device impression is converted to electric current output, and its advantage is that supply voltage is lower, signal is undistorted, frequency response is good, two-wire system is transmitted, long transmission distance;
But, appearance along with " compound sensor " that can detect multiple physical quantity, as patent ZL98230758.6 described " compound sensor ", the built-in conditioner circuit of then existing various sensors all can not satisfy use, because they can only adapt to the sensor that detects a kind of physical quantity.When particularly this compound sensor is used for aircraft, vehicle, naval vessel, therefore existing signal-transmitting cable majority is armouring, the cable that does not possess anti-jamming capacity, needs anti-interference, as to allow to support with the built-in many signal conditioning circuits of sensor that the two-wire system mode is used the simple cable teletransmission this compound sensor and the signal is far passed thereof needs.
Summary of the invention
Task of the present invention is, design a kind of low voltage power supply, can use for compound sensor, can produce each Sensitive Apparatus of compound sensor, the a plurality of electrical signal conversion that certain frequency, other a plurality of alternating current-direct current original signals of pulse width difference arranged or satisfy other source of above-mentioned requirements are voltage signal, amplification, stack, finally be converted to a recombination current signal, be connected with detecting instrument with two-wire system and obtain power supply and output; And the current signal of output includes the information content of each original signal and unlikely lose, and can through after the processing of the detecting instrument related circuit that connects, can and isolate a kind of so many signal conditioning circuits of the voltage signal that characterizes each original information content with this recombination current signal reduction.
Technical scheme of the present invention is:
The present invention contain circuit substrate 1 and be arranged on the substrate be laid in substrate on corresponding 8 connection terminals that are connected of internal circuit, it is characterized in that internal circuit is provided with " virtual earth " M as each original input signal common port (effect of virtual earth M is so that this many signal conditioners only connect with two-wire system the subsequent detection instrument and guarantee the normal co-ordination of internal circuit to each Sensitive Apparatus, output circuit); With an energy with relative interior virtual earth M input, certain frequency or pulse width difference are arranged, multichannel alternating current-direct current conversion of signals is many signals superimposer NO that voltage amplifies, superposes
1And an energy is with many signals superimposer NO
1The voltage signal of " virtual earth " M output is converted to the voltage-current converter NO of current signal relatively
2P
1, P
2Being the positive and negative power input of this circuit, also is the output terminal of this circuital current signal, P
3It is public virtual earth M link; A plurality of curtages, electric charge, resistance, all original input signal S of Hall effect
1～S
N(N 〉=2) are inserted internal circuit by the relative virtual earth M of some terminal and are realized corresponding required the connection with circuit; Multiple signals superimposer NO
1Common port G meet virtual earth M, its output terminal OUT and virtual earth M receive voltage-current converter NO respectively
2Input end A, B, NO
2Positive output end C meet the sub-P of power positive end
1, its negative output terminal D meets the negative terminal P of power supply
2(referring to accompanying drawing 1)
Described signal conditioning circuit is a kind of many signal conditioning circuits.
Described compound sensor, the temperature sensor T that it contains a constant-current source type is AD590, signal conditioning circuit contains amplifier N
1, N
2, resistor R
1～R
7, reducing transformer R
8, capacitor C
1, 8 connection terminal P
1～P
8, N wherein
I, R
1～R
4, C
1Form " many signals superimposer " NO
1, N
2, R
5～R
8Form " current-voltage converter " NO
2, terminals P
8Meet P
1, terminals P
7Meet R
2An end and R
1An end, R
1Another termination virtual earth M, R
2Another termination amplifier N
1Positive input terminal, terminals P
5Meet amplifier N
1Positive input terminal, resistance R
3Be connected on amplifier N
1Negative input end and output terminal between, amplifier N
1Negative input end also be connected in series capacitor C
1Connecting terminal P again
6, terminals P
4Meet virtual earth M, R
4Be connected in P
4, P
6Between, amplifier N
1, N
2Negative supply termination virtual earth M, amplifier N
1, N
2Positive supply termination P
1, in virtual earth M and terminals P
2Between connecting resistance R
7, from terminals P
2To N
2Negative input end connecting resistance R
6, from amplifier N
1Output terminal and amplifier N
2Negative input end indirect resistance R
5, amplifier N
2Output terminal and P
1Between meet reducing transformer R
8, the anodal connecting terminal P of temperature sensor T
8, its negative pole connecting terminal P
7, the device Y of a responsive vibration is connected to P
3, P
5Between.
Described compound sensor, its signal conditioner circuit also contains amplifier N
3, its positive input terminal is received P
7, its negative input end is received its output terminal and is made follower, resistance R
4Reconfiguration is at N
1Negative input end and N
3Output terminal between.
Described compound sensor, it also contains silicon cup formula piezoresistive pressure Sensitive Apparatus YZ, and its positive power source terminal E meets P
7, negative power end F meets P
4, its output terminal G or H termination P
6, the other end is idle, with the G or the alternative R of the resistance between H and the F of pressure resistance type pressure-sensitive component
4
Described compound sensor, it is a kind of temperature-magneto-electric rotating speed compound sensor, the solenoid substitutional resistance R of its rotating speed Sensitive Apparatus N
4Be connected to P
6, P
4Between the two ends.
Described compound sensor. it is a kind of temperature-Hall rotating speed compound sensor, and the anode E of hall device HE meets P
8, negative terminal F meets P
4, half-bridge output terminal H or G meet P
6, the other end is idle, with the G or the alternative R of the resistance between H and the F of Hall magnetic-sensitive elements
4
Originally as long as many signal conditioning circuits are appropriate match circuit parameter and the device selected. promptly have the double output of two-wire system power supply, required circuit voltage is low, the information content that comprises each original input signal do not lose, undistorted, frequency response is good, many superior effects such as anti-interference long line transmission.
Many signal conditioning circuits are particularly suitable for being applied to make the signal conditioning circuit of various compound sensors.
Description of drawings
Accompanying drawing 1 is many signal conditioning circuits main structure chart;
Accompanying drawing 2 is the conditioner circuit of a kind of being used for " temperature-vibration compound sensor ";
Accompanying drawing 3 is the conditioner circuit of a kind of being used for " temperature-vibration compound sensor ";
Accompanying drawing 4 is many signal conditioners circuit diagram of the compound sensor of sensitive temperature dynamic pressure and vibration formation;
Accompanying drawing 5 is applied to the circuit diagram of " temperature-magneto-electric rotating speed compound sensor " for the present invention;
Accompanying drawing 6 is applied to the circuit diagram of " temperature-Hall rotating speed compound sensor " for the present invention;
Accompanying drawing 7A, 7B are the electrical block diagram of its current-voltage converter and demultiplexer in the detector with compound sensor embodiment 1,2,4,5 continued accesses.
Embodiment
Below in conjunction with accompanying drawing these many signal conditioning circuits being used the some embodiment that give compound sensor is further described.
The embodiment of described compound sensor contains " temperature one an XX compound sensor " with constant-current source type temperature sensor (as AD590).
Fig. 2 is the signal conditioner circuit of a kind of being used for " temperature-vibration compound sensor ".
Circuit is by two operational amplifier N
1, N
2, resistor R
1～R
7, reducing transformer R
8, capacitor C
1, connection terminal P
1～P
8Form.N
1, R
1～R
4, C
1Form many signals superimposer NO
1, N
2, R
5～R
8Form current-voltage converter NO
2
Terminals P
8Meet P
1, terminals P
7Meet R
2An end and R
1An end, R
1Another termination virtual earth M, R
2Another termination amplifier N
1Positive input terminal, terminals P
5Connect the positive input terminal of amplifier N1, resistance R
3Be connected on amplifier N
1Negative input end and output terminal between, amplifier N
1Negative input end through the serial connection capacitor C
1Connecting terminal P
6, terminals P
4Meet virtual earth M, R
4Be connected in P
4, P
6Between.Amplifier N
1, N
2Negative supply termination virtual earth M, amplifier N
1, N
2Positive supply termination P
1, in virtual earth M and terminals P
2Between connecting resistance R
7, from terminals P
2To N
2Negative input end connecting resistance R
6, from output terminal and the amplifier N of amplifier N1
2Negative input end indirect resistance R
5, amplifier N
2Output terminal and P
1Between meet reducing transformer R
8The positive pole of temperature sensor T (AD590) is received terminals P
8, the negative pole of T is received P
7, vibration-sensitive device Y (as the piezoelectric ceramics sound sensor that shakes) is connected to terminals P
3, P
5Ask.Actual man-hour, the amplifier N of adding
1, N
2Can be with the double operational of a little electric current, as TCL2552, TLC2262, select-50～125 ℃ the miniature device that mounts of bearing of military version for use, all resistance devices also use and mount device, and all set of devices are contained in about a 6 * 6mm
2～15 * 15mm
2 Circuit substrate 1 on.
The continuous current that produces behind the temperature sensor T sensitive temperature flows through R
1Generation is with respect to the pressure drop U of virtual earth M
1, the sensitivity of T (AD590) is A/ ℃ of SW=1 μ, the scope of measuring temperature is-50～125 ℃, corresponding to the electric current of 0 degree be 273 μ A. when absolute temperature is t, R
1On voltage be U
1T=R
1* t * SW.This voltage is through R
2, receive amplifier N
1Positive input terminal, by amplifier N
1Follow virtual earth P
3, P
4(M) output.Because amplifier N
1Input impedance high (the only about 1Pa of the electric current of input end), R
2Almost do not have on the resistance (for example IOM Ω) pressure drop (pressure drop only be 10 μ v).Vibration-sensitive device Y (as piezoelectric ceramics) is received terminals P
3(M) and P
5, it experiences vibration, impact in sensor after, the electric charge of generation is at itself electric capacity, amplifier N
1Anode input end capacitor, lead-in wire distributed capacitance on produce alternating voltage u, corresponding to temperature t R
1The DC voltage V of last generation
1T stack input in parallel amplifier N
1Positive input terminal.Resistance R
2Resistance design enough big (10M Ω), make it to be not enough to piezoelectric signal is shunted.So, amplifier N
1The vibration of output terminal, impact alternating voltage u
1Equal:
u
1＝u×(1+R3/R
4)
CSET C
1Capacity design get enough big, make its for the capacitive reactance of alternating current much smaller than outer meeting resistance R
4Impedance, thereby good LF-response is arranged.
The sensitivity of piezoelectric ceramics Y and resistor R
1Numerical value make following coupling: R when lower limit temperature (50 degree)
1On pressure drop V
1, the crest voltage that is produced greater than piezoelectric ceramics circuit when the responsive maximum impact.
In voltage-current converter, with P
2As output terminal, with M as the reference point.Input signal is N
1Output voltage (U to M
1+ u
1).Circuit is controlled P automatically
2Voltage U with respect to M
2Be:
U
2＝-(U
1+u
1)×R
6/R
5
P then
2Electric current with respect to M output is:
I
2＝U
2/R
7＝-(U
1+u
1)×R
6/(R
5×R
7)
From M to P
2The electric current that flows out is:
IOUT＝-I
2＝(U
1+u
1)×R
6/(R
5×R
7)
Reducing transformer R
8Effect be to make amplifier N
2Output terminal by it to power end P
1Current sinking provides the output current of voltage to current converter.For unlikely because R
8Too little and amplifier N when making little electric current
2Output end voltage near power supply P
1Voltage and lost efficacy, also be unlikely to because R
8Amplifier N when too big and electric current is big
2Output end voltage approach amplifier negative power end M voltage and lost efficacy, amplifier can select out-put dynamic range to approach single supply " track to track " amplifier of its power supply voltage; Reducing transformer R
8Can be a suitable resistor or a positive termination P
1Diode or a positive termination P
1Luminotron.
Further specify this embodiment with concrete design data below.
If the sensitivity of temperature sensor T (AD590) is: A/ ℃ of SW=1 μ, its working range is-50～125C,
The voltage sensitivity of the output of piezoelectric sensitivity device and relevant capacitor decision is: SY=IOmV/g,
R
1=10k, R
2=10M, R
3=100k, R
4=100k, R
5=100k, R
6=10k, R
7=0.10101k, R
8=1N4148, N
1And N
2Be dual operational amplifier TLC2252.The quiescent current of its single amplifier is 0.0625mA, capacitor C
1=1 μ f.
Calculate the temperature current sensitivity S WIP of its output
2[μ A/ ℃] and oscillating current sensitivity S YIP
2[μ A/g] is as follows.
N
1Output terminal is with respect to the temperature voltage U of M
1Sensitivity:
SWVI＝SW×R
1＝SW×10k＝10mV/℃
P
2Hold the temperature voltage sensitivity of relative M:
SWVP
2＝SWVI×R
6/R
5＝1mV//℃
P
2Hold the temperature current sensitivity of relative M:
SWIP
2＝SWVP
2/(R
7//R
6)＝1mV/℃/0.1k＝10A/℃
In like manner, P
2Hold the oscillating current sensitivity of relative M:
SYIP
2＝20μA/g
When temperature survey lower limit-50 ℃, R
1On voltage be:
V
1-50＝10k×(273-50)℃×1μA/℃＝2.23V
The vibration dynamic range lower limit that can allow is:
Ymin＝2.23V/10mV/g＝223g
When temperature survey lower limit-50 ℃.Flow through R
7Direct current (temperature) electric current be:
IR
7min＝10A/℃×223℃＝2.23mA
Because the quiescent current of operational amplifier TLC2252 is 2 * 0.0625mA=0.125mA, the electric current of temperature sensor is 0.223mA,
Therefore, the dynamic current that allows of circuit is: 2.23-0.125-0.223=1.882mA
The vibration dynamic range that allows is: 1882/20=94.1g
Circuit can reliable transmission 90g acceleration signal.
When 125 ℃ of the temperature survey upper limits, R
1On voltage be:
U1
+125＝10k×(273+125)℃×1μA/℃＝3.98V
When 125 ℃ of the temperature survey upper limits, flow through R
7Direct current (temperature) electric current be:
IR
7min＝t0μA/℃×398℃＝3.8mA
R
7On voltage drop be 3.98V, consider the vibratory impulse of 100g.Its alternating voltage peak is 2v, and the high level of the relative virtual earth output of N01 is 6V, and therefore, the supply voltage that this multiparameter conditioner circuit is clamored to instrument does not have strict requirement, allows for 8～15V.Its upper voltage limit only is subjected to the restriction of the voltage that devices such as amplifier can bear.Above-mentioned parameter satisfies practical requirement fully.
The following stated embodiment does some to change and form on the circuit base of the foregoing description 1
Embodiment illustrated in fig. 32 is to increase amplifier N on the basis of embodiment 1
3Its positive input terminal is received P
7Its negative input end is received its output terminal make follower, and R
4Reconfiguration is at N
1Negative input end and N
3Output terminal between.Because R
2" R
1, P
7So ac potential be similar to virtual earth M. follower N
3The ac potential of output terminal also be similar to M, N
2Amplification coefficient for vibration voltage equals (R
3/ R
4+ 1), with implement 1 come to the same thing; Because N
3The DC voltage of output terminal is equal to N
1Input voltage, so N
2Amplification coefficient to the temperature DC voltage is 1, also with the coming to the same thing of embodiment 1.But the advantage of bringing is: owing to be not subjected to limited C
1With R
4The influence of time constant, the LF-response of embodiment 2 is only by R
2Distributed capacitance decision with piezoelectric crystal Y etc.
Embodiment illustrated in fig. 43 is many signal conditioners circuit diagrams of the compound sensor of sensitive temperature, dynamic pressure and vibration formation.This compound sensor can be used to compressor surge is done early warning and warning, because before surge takes place, the ANOMALOUS VARIATIONS of temperature comes early warning is carried out in surge before high frequency violent oscillatory motion that stall gas takes place before the available detection surge and the surge; And pressure is low frequency pulsating significantly during surge, and available dynamic pressure detects confirms surge gaseous tension pulsation rule and confirm that surge took place already.
The feature of this compound sensor circuit is, contains silicon cup formula piezoresistive pressure Sensitive Apparatus YZ, and its positive power source terminal E meets P
7, negative power end F meets P
4, its output terminal G (or H) meets P
6, the other end is idle, is G (or H) and the alternative R of the resistance between the F with the pressure resistance type pressure-sensitive component
4, constitute semibridge system dynamic pressure detection mode.
Because E, the resistance value REF (is unit with k Ω) at F two ends of silicon cup piezoresistance sensitivity device are constant, are about 0.5～4.0k Ω, then itself and R
1Parallel resistor Rw (is unit with k Ω) determines that also then circuit output rhythm temperature control (electric current) is:
SWIOUT＝R
w[μA/℃]
If the pressure sensitivity of silicon cup piezoresistance sensitivity device is: SYZ[Ω/Pa], then Shu Chu pressure drag current sensitivity is:
SYZIOUT＝SYZ[Ω/Pa]×(R
w/R3)/1000 [μA/Pa]
If the vibration sensitivity of vibration piezoelectric sensitivity device is: SZ[mV/g], then Shu Chu oscillating current sensitivity is:
SZIOUT＝SZ(1+R
3/Rw) [μA/g]
Embodiment illustrated in fig. 54 is that many signal conditioning circuits of the present invention are applied to the example of " temperature-magneto-electric rotating speed compound sensor ", " temperature-magneto-electric rotating speed compound sensor " the solenoid substitutional resistance device R of rotating speed Sensitive Apparatus N
4Be connected to P
6, P
4Between the two-terminal, with the shunt voltage negative feedback mode by N
1Amplify P
5, P
7Can short circuit.
Accompanying drawing 6 is that many signal conditioning circuits of the present invention are used for the example 5 of " temperature-Hall rotating speed compound sensor ".The anode E of hall device HE meets P
8, negative terminal F meets P
4, one of half-bridge output terminal H or G meet P
6, the other end is idle, with the G or the replacement of the resistance between H and the F R of Hall magnetic-sensitive elements
4Hall magnetic effect signal is by N
1Amplify with the shunt voltage negative feedback mode.P
7, P
5Can short circuit.
In order from the current signal of many signal conditioning circuit outputs, to obtain the content of each original input signal, its follow-up detecting instrument 1 should be able to revert to the voltage composite signal with above-mentioned recombination current signal reduction, and then isolates the voltage signal of corresponding each original signal from the voltage composite signal.In addition, many signal conditioning circuits are that two-wire system is connected with the subsequent detection instrument, will be to latter's output current signal except that the former, and the latter also needs to provide working power to the former.Therefore, the feature of subsequent detection instrument is to contain corresponding electric current one electric pressure converter NO
3With demultiplexer NO
4, and the feed circuit that required plus or minus power supply can be provided to signal conditioner.This is the terminals P of (or negative) power supply and many signal conditioning circuits just
1(or P
2) connect electric current one electric pressure converter NO
3Current input terminal I-and another terminal P
2(or P
1) connect, other end I+ ground connection, the voltage that its output terminal OV exports is over the ground received demultiplexer NO
4Input end IV, NO
4Another input end grounding.NO
4With each signal voltage of separating respectively from its output terminal VS
1～VS
NExport subsequent conditioning circuit to.(its circuit diagram is referring to accompanying drawing 1).
It shown in Fig. 7 A, the 7B circuit structure of its current-voltage converter and demultiplexer in the detector of corresponding and 1,2,4,5 continued accesses of compound sensor example.
Fig. 7 A uses positive supply to take signal to many signal conditioning circuit 1 anode power supplies and from many signal conditioning circuit 1 negative terminals.It is characterized in that current-voltage converter contains amplifier N
4And resistance R
9, demultiplexer NO
4Contain amplifier N
5, resistance R
10, R
11, capacitor C
10, C
11, instrument with+12V to sensor P
1The end power supply, autobiography sensor P
2The electric current of end output causes N
4Negative input end I-, resistance R
9Be connected to N
4Negative input end and output terminal between, N
4Positive input terminal I+ ground connection; Amplifier N
5Negative input end through resistance R
10With N
4Output terminal connect resistance R
11, capacitor C
11Be connected in N in parallel
5Negative input end and output terminal between, N
5Positive input terminal ground connection; N
4Output terminal through capacitor C
10Exclude DC component output vibration AC signal SYOUT, N
5, C
11, R
10Form the inverting integrator filtering and exchange N
5Output terminal output filtering positive polarity d. c. voltage signal AC compounent, corresponding temperature SWOUT.
Fig. 7 B uses negative supply to take signal to many signal conditioning circuit 1 negative terminal power supplies and from many signal conditioning circuit 1 anodes.Current-to-voltage convertor NO similarly
3Contain amplifier N
4And resistance R
9Demultiplexing circuit NO
4Contain C
10, C
12, R
12, C
10Exclude DC component, output vibration AC signal SYOUT, R
12, C
12Filtering vibration AC compounent, output cathode degree direct current signal warm in nature SWOUT.
One of many signal conditioning circuits of the present invention have been made the thick film circuit device, are applied in temperature-vibration compound sensor, and are respond well.Circuit can further increase required resistor, capacitor and wiring and connect and compose integrated circuit on the silicon of existing operational amplifier, external terminal is defined as the sheet pin of new multiparameter conditioner circuit integrated circuit, be more conducive to microminiaturization, have broad application prospects.
Claims (7)
1. signal conditioning circuit more than a kind, contain circuit substrate (1) and be arranged on the substrate be laid in substrate on corresponding 8 the connection terminal (P that are connected of internal circuit
1-P
8), it is characterized in that: internal circuit is provided with one as " virtual earth " of each original input signal common port (M); With an energy with relative interior virtual earth (M) input, certain frequency or pulse width difference are arranged, multichannel alternating current-direct current conversion of signals is many signals superimposer (NO that voltage amplifies, superposes
1) and an energy with many signals superimposer (NO
1) relatively " virtual earth " voltage signal of (M) exporting be converted to " voltage-current converter " (NO of current signal
2); The first terminal (P
1), the second terminal (P
2) be the positive-negative power input end of this circuit, also be the output terminal of this circuital current signal, the 3rd terminal (P
3) be public virtual earth (M) link; A plurality of curtages, electric charge, resistance, all original input signal (S of Hall effect
1～S
n), insert internal circuit by the relative virtual earth of some terminal (M) and realize corresponding required the connection with circuit; " multiple signals superimposer " (NO
1) common port (G) connect virtual earth (M), its output terminal (OUT) and virtual earth (M) are received " voltage-current converter " (NO respectively
2) input end (A), (B), voltage-current converter (NO
2) positive output end (C) meet power positive end (P
1), its negative output terminal (D) meets power-terminal (P
2).
2. a compound sensor is made of Sensitive Apparatus and signal conditioning circuit, it is characterized in that: signal conditioning circuit is a kind of many signal conditioning circuits as claimed in claim 1.
3. by the described compound sensor of claim 2, it is characterized in that: it contains the temperature sensor AD590 (T) of a constant-current source type, and signal conditioning circuit contains two amplifier (N
1), (N
2), seven resistor (R
1～R
7), reducing transformer (R
8), electric capacity (C
1), 8 connection terminal (P
1～P
8), the first amplifier (N wherein
1), preceding four resistor (R
1～R
4), the first electric capacity (C
1) composition " many signals superimposer " (NO
1), the second amplifier (N
2), back four resistor (R
5～R
8) composition " current-voltage converter " (NO
2), the 8th terminal (P
8) meet the first terminal (P
1), the 7th terminal (P
7) meet the second resistor (R
2) an end and the first resistor (R
1) an end, the first resistor (R
1) another termination virtual earth (M), the second resistor (R
2) another termination first amplifier (N
1) positive input terminal, five terminal (P
5) meet the first amplifier (N
1) positive input terminal, the 3rd resistor (R
3) be connected on the first amplifier (N
1) negative input end and output terminal between, the first amplifier (N
1) negative input end also be connected in series the first electric capacity (C
1) meet the 6th terminal (P again
6), the 4th terminal (P
4) connect virtual earth (M), the 4th resistor (R
4) be connected in the 4th terminal (P
4), the 6th terminal (P
6) between, the first amplifier (N
1), the second amplifier (N
2) negative supply termination virtual earth (M), the first amplifier (N
1), the second amplifier (N
2) positive supply termination the first terminal (P
1), at the virtual earth (M) and the second terminal (P
2) between meet the 7th resistor (R
7), from the second terminal (P
2) to the second amplifier (N
2) negative input end meet the 6th resistor (R
6), from the first amplifier (N
1) the output terminal and the second amplifier (N
2) indirect the 5th resistor (R of negative input end
5), the second amplifier (N
2) output terminal and the first terminal (P
1) between meet reducing transformer (R
8), the positive pole of temperature sensor (T) meets the 8th terminal (P
8), its negative pole meets the 7th terminal (P
7), the device (Y) of a responsive vibration is connected to the 3rd terminal (P
3), five terminal (P
5) between.
4. by the described compound sensor of claim 3, it is characterized in that: described signal conditioner circuit also contains the 3rd amplifier (N
3), its positive input terminal is received the 7th terminal (P
7), its negative input end is received its output terminal and is made follower, the 4th resistor (R
4) reconfiguration is at the first amplifier (N
1) negative input end and the 3rd amplifier (N
3) output terminal between.
5. by the described compound sensor of claim 3, it is characterized in that: it also contains silicon cup formula piezoresistive pressure Sensitive Apparatus (YZ), and its positive power source terminal (E) meets the 7th terminal (P
7), negative power end (F) meets the 4th terminal (P
4), its output terminal (G) or (H) termination the 6th terminal (P
6), the other end is idle, substitutes the 4th resistor (R with the G end of pressure resistance type pressure-sensitive component or the resistance between H section and the F end
4).
6. by the described compound sensor of claim 3, it is characterized in that: it is a kind of temperature-magneto-electric rotating speed compound sensor, and the solenoid of its rotating speed Sensitive Apparatus (N) substitutes the 4th resistor (R
4) be connected to the 6th terminal (P
6), the 4th terminal (P
4) between the two ends.
7. by the described compound sensor of claim 3.It is characterized in that: it is a kind of temperature-Hall rotating speed compound sensor, and the anode (E) of hall device (HE) meets the 8th terminal (P
8), negative terminal (F) meets the 4th terminal (P
4), half-bridge output terminal (H) or (G) meet the 6th terminal (P
6), the other end is idle, substitutes the 4th resistor (R with the G end of Hall magnetic-sensitive elements or the resistance between H end and the F end
4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN001059920A CN100406852C (en) | 2000-04-24 | 2000-04-24 | Multi-signal processing circuit, compund sensor and following detector thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN001059920A CN100406852C (en) | 2000-04-24 | 2000-04-24 | Multi-signal processing circuit, compund sensor and following detector thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1274075A CN1274075A (en) | 2000-11-22 |
| CN100406852C true CN100406852C (en) | 2008-07-30 |
Family
ID=4578068
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN001059920A Expired - Lifetime CN100406852C (en) | 2000-04-24 | 2000-04-24 | Multi-signal processing circuit, compund sensor and following detector thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100406852C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102162740B (en) * | 2010-12-14 | 2012-10-10 | 中国飞机强度研究所 | Transmitter |
| US10145860B2 (en) * | 2016-03-11 | 2018-12-04 | Epro Gmbh | Speed detection using multiple processing paths |
| CN106644333A (en) * | 2016-07-15 | 2017-05-10 | 北京卫星环境工程研究所 | Large thrust vibration test system current monitoring converter |
| CN114526767A (en) * | 2021-12-24 | 2022-05-24 | 杭州安脉盛智能技术有限公司 | Vibration and temperature integrated sensor based on two-wire system analog signal transmission |
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|---|---|---|---|---|
| CN1133439A (en) * | 1995-05-25 | 1996-10-16 | 中国工程物理研究院计算机应用研究所 | Monitoring and measuring system for transient parameter of multiplex high power discharge pulse |
| CN2274777Y (en) * | 1996-07-30 | 1998-02-18 | 陈国发 | Portable universal instrument |
| US5847592A (en) * | 1993-09-20 | 1998-12-08 | Deutsche Thomson-Brandt Gmbh | Driving circuit with several sensors |
| CN2337548Y (en) * | 1998-07-15 | 1999-09-08 | 中国航空工业总公司第六○八研究所 | Vibrating and resonance demodulation trouble detecting instrument |
| CN1247987A (en) * | 1999-06-24 | 2000-03-22 | 谭维克 | Capacitance detecting circuit and its application |
-
2000
- 2000-04-24 CN CN001059920A patent/CN100406852C/en not_active Expired - Lifetime
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5847592A (en) * | 1993-09-20 | 1998-12-08 | Deutsche Thomson-Brandt Gmbh | Driving circuit with several sensors |
| CN1133439A (en) * | 1995-05-25 | 1996-10-16 | 中国工程物理研究院计算机应用研究所 | Monitoring and measuring system for transient parameter of multiplex high power discharge pulse |
| CN2274777Y (en) * | 1996-07-30 | 1998-02-18 | 陈国发 | Portable universal instrument |
| CN2337548Y (en) * | 1998-07-15 | 1999-09-08 | 中国航空工业总公司第六○八研究所 | Vibrating and resonance demodulation trouble detecting instrument |
| CN1247987A (en) * | 1999-06-24 | 2000-03-22 | 谭维克 | Capacitance detecting circuit and its application |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1274075A (en) | 2000-11-22 |
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