CN1274075A - 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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Abstract
A multi-signal processing circuit features that J terminals correspondent to internal circuit are arranged on basic circuit board, the internal circuit has a multi-signal adder for converting each input signal to voltage, amplifying it and adding them and a voltage/current converter for converting voltage signal to current one, and two lines are used to connect with following circuit for supplying electric power. Its advantages include low voltage of power supply, no losing original information of multiple signals, high frequency response for remote transmission and high anti-interference nature. It is suitable for processing signals of composite sensor.
Description
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.
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, be subjected to the cable distribution parameter influence and be 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 and installed at sensor internal, be used for the original signal of sensor is nursed one's health, amplify, the signal conditioner of long-distance transmissions again is as the U.S., the piezoelectric acceleration sensor of the output voltage signal that country such as Denmark makes, its built-in two-wire system electron-amplifier promptly is a kind of one-parameter, the signal conditioner of 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 antijamming capability, 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.
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 contains circuit substrate 1 and is arranged on J (P1, P2, P3 on the substrate ... PJ) be laid in substrate on the corresponding connection terminal that is 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, multichannel alternating current-direct current conversion of signals are arranged is voltage many signals superimposer N01 of amplifying, superposeing and energy with many signals superimposer N01 relatively the voltage signal of " virtual earth " M output be converted to the voltage-current converter N02 of current signal; P1, P2 are the positive and negative power input of this circuit, also are the output terminals of its current signal, and P3 is public virtual earth M link; A plurality of curtages, electric charge, resistance, all original input signal S1～SN of Hall effect (N 〉=2) insert internal circuit by the relative virtual earth M of certain a few terminal in J the connection terminal and realize corresponding required the connection with circuit; The common port G of multiple signals superimposer N01 meets virtual earth M, and its output terminal OUT and virtual earth M receive input end A, the B of voltage-current converter N02 respectively, and the positive output end C of N02 meets the sub-P1 of power positive end, and its negative output terminal D meets the negative terminal P2 of power supply.(referring to accompanying drawing 1)
As long as these many signal conditioning circuits are appropriate match circuit parameter and the device selected, promptly have the two-wire system power supply output of holding concurrently, required circuit voltage is low, and 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.
Below in conjunction with accompanying drawing some embodiment that these many signal conditioning circuits are applied to compound sensor are further described.
The embodiment of described compound sensor contains " temperature-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 N1, N2, resistor R 1～R7, reducing transformer R8, and capacitor C 1, connection terminal P1～P8 forms.N1, R1～R4, C1 form many signals superimposer N01, and N2, R5～R8 forms current-voltage converter N02.
The continuous current that produces behind the temperature sensor T sensitive temperature flows through the pressure drop U1 of R1 generation with respect to virtual earth M, and the sensitivity of T (AD590) is A/ ℃ of SW=1 μ, and the scope of measuring temperature is-50～125 ℃, is 273 μ A corresponding to 0 electric current of spending.When absolute temperature was t, the voltage on the R1 was U1t=R1 * t * SW.This voltage is received the positive input terminal of amplifier N1 through R2, is followed by amplifier N1 virtual earth P3, P4 (M) are exported.Because the input impedance high (the only about 1Pa of the electric current of input end) of amplifier N1 does not almost have pressure drop (pressure drop only is 10 μ V) on the R2 resistance (for example 10M Ω).Vibration-sensitive device Y (as piezoelectric ceramics) is received terminals P 3 (M) and P5, it experiences vibration, impact in sensor after, the electric charge that produces produces alternating voltage u on the electric capacity of itself, the anode input end capacitor of amplifier N1, the distributed capacitance that goes between, the positive input terminal of the DC voltage V1t that on R1 produce corresponding with temperature t stack input in parallel amplifier N1.The resistance of resistance R 2 design enough big (10M Ω), make it to be not enough to piezoelectric signal is shunted.So the vibration of amplifier N1 output terminal, impact alternating voltage u1 equal:
u1＝u×(1+R3/R4)
The Capacity design of CSET C1 gets enough big, makes it for the capacitive reactance of the alternating current impedance much smaller than outer meeting resistance R4, thereby good LF-response is arranged.
The numerical value of the sensitivity of piezoelectric ceramics Y and resistance R 1 is made following coupling: the pressure drop V1 when lower limit temperature (50 degree) on the R1, the crest voltage that is produced greater than piezoelectric ceramics circuit when the responsive maximum impact.
In voltage-current converter, as output terminal, as the reference point, input signal is the output voltage (U1+u1) of N1 to M with M with P2.Circuit is controlled P2 automatically:
U2＝-(U1+u1)×R6/R5
Then P2 with respect to the electric current of M output is:
I2＝U2/R7＝-(U1+u1)×R6/(R5×R7)
From M be to the electric current that P2 flows out:
IOUT＝-I2＝(U1+u1)×R6/(R5×R7)
The effect of reducing transformer R8 is to make the output terminal of amplifier N2 provide the output current of voltage to current converter to power end P1 current sinking by it.For unlikely when making little electric current because R8 is too little the output end voltage of amplifier N2 lost efficacy near the voltage of power supply P1, the output end voltage that also is unlikely to because R8 is too big amplifier N2 when electric current is big 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 R8 can be the diode of a suitable resistor or a positive termination P1 or the luminotron of a positive termination P1.
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-50～125 ℃,
The voltage sensitivity of the output of piezoelectric sensitivity device and relevant capacitor decision is: SY=10mV/g,
R1=10k, R2=10M, R3=100k, R4=100k, R5=100k, R6=10k, R7=0.10101k, R8=1N4148, N1 and N2 are dual operational amplifier TLC2252, the quiescent current of its single amplifier is 0.0625mA, capacitor C1=1 μ f.
Calculate A/ ℃ of the temperature current sensitivity S WIP2[μ of its output] and oscillating current sensitivity S YIP2[μ A/g] as follows.
The N1 output terminal is with respect to the sensitivity of the temperature voltage U1 of M:
SWV1＝SW×R1＝SW×10k＝10mV/℃
P2 holds the temperature voltage sensitivity of relative M:
SWVP2＝SWV1×R6/R5＝1mV//℃
P2 holds the temperature current sensitivity of relative M:
SWIP2＝SWVP2/(R7∥R6)＝1mV/℃/0.1k＝10μA/℃
In like manner, P2 holds the oscillating current sensitivity of relative M:
SYIP2＝20μA/g
When temperature survey lower limit-50 ℃, the voltage on the R1 is:
V1
-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 ℃, direct current (temperature) electric current that flows through R7 is:
IR7min＝10μA/℃×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, the voltage on the R1 is:
U1
+125＝10k×(273+125)℃×1μA/℃＝3.98V
When 125 ℃ of the temperature survey upper limits, direct current (temperature) electric current that flows through R7 is:
IR7min＝10μA/℃×398℃＝3.98mA
Voltage drop on the R7 is 3.98V, considers the vibratory impulse of 100g, and its alternating voltage peak is 2V, and the high level of the relative virtual earth output of N01 is 6V, and therefore, this multiparameter conditioner circuit does not have strict requirement to the supply voltage of instrument, 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 N3 on the basis of embodiment 1, and its positive input terminal is received P7.Its negative input end is received its output terminal makes follower, and the R4 reconfiguration between the output terminal of the negative input end of N1 and N3.Because R2＞＞R1, the ac potential of P7 is similar to virtual earth M, so the ac potential of the output terminal of follower N3 also is similar to M, N2 equals (R3/R4+1) for the amplification coefficient of vibration voltage, with coming to the same thing of embodiment 1; Because the DC voltage of N3 output terminal is equal to the input voltage of N1, so N2 is 1 to the amplification coefficient of temperature DC voltage, also with the coming to the same thing of embodiment 1.But the advantage of bringing is: owing to be not subjected to the influence of the time constant of limited C1 and R4, the LF-response of embodiment 2 is only determined by the distributed capacitance of R2 and 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, contain silicon cup formula piezoresistive pressure Sensitive Apparatus YZ, its positive power source terminal E meets P7, negative power end F meets P4, its output terminal G (or H) meets P6, the other end is idle, is G (or H) and the alternative R4 of the resistance between the F with the pressure resistance type pressure-sensitive component, constitutes 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 it is also determined with R1 parallel resistor Rw (is unit with k Ω), and then the temperature control (electric current) exported of circuit is:
SWIOUT＝Rw[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]×(Rw/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+R3/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 ", the solenoid substitutional resistance R4 of the rotating speed Sensitive Apparatus N of " temperature-magneto-electric rotating speed compound sensor " is connected between P6, the P4 two-terminal, amplified by N1 with the shunt voltage negative feedback mode, P5, P7 can short circuits.
Accompanying drawing 6 is that many signal conditions of the present invention road is used for the embodiment 5 of " temperature-Hall rotating speed compound sensor ".The anode E of hall device HE meets P8, and negative terminal F meets P4, and one of half-bridge output terminal H or G meet P6, and the other end is idle, with the G or the replacement of the resistance between H and the F R4 of Hall magnetic-sensitive elements.Hall magnetic effect signal is amplified with the shunt voltage negative feedback mode by N1.P7, P5 can short circuits.
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 current-voltage converter N03 and demultiplexer N04, and the feed circuit that required plus or minus power supply can be provided to signal conditioner.This just (or negative) power supply be connected with the terminals P 1 (or P2) of many signal conditioning circuits, the current input terminal I-of current-voltage converter N03 is connected with another terminal P2 (or P1), other end I+ ground connection, the voltage that its output terminal OV exports is over the ground received the input end IV of demultiplexer N04, another input end grounding of N04.Each signal voltage that N04 will separate exports subsequent conditioning circuit to from its output terminal VS1～VSN respectively.(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 compound sensor embodiment 1,2,4,5 continued accesses.
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 N4 and resistance R 9, demultiplexer N04 contains amplifier N5, resistance R 10, R11, capacitor C 10, C11, instrument with+12V to the power supply of sensor P1 end, the electric current of autobiography sensor P2 end output causes the negative input end I-of N4, resistance R 9 is connected between the negative input end and output terminal of N4, the positive input terminal I+ ground connection of N4; The negative input end of amplifier N5 is connected with the output terminal of N4 through resistance R 10, and resistance R 11, capacitor C 11 are connected between the negative input end and output terminal of N5 in parallel, the positive input terminal ground connection of N5; The output terminal of N4 excludes DC component output vibration AC signal SYOUT through capacitor C10, N5, C11, R11, R10 form the inverting integrator filtering and exchange, output terminal output filtering positive polarity d. c. voltage signal AC compounent, corresponding temperature the SWOUT of N5.
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.Similarly current-to-voltage convertor N03 contains amplifier N4 and resistance R 9.Demultiplexing circuit N04 contains C10, C12, R12, and C10 excludes DC component, output vibration AC signal SYOUT, R12, C12 filtering 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 (10)
- Signal conditioning circuit more than 1 one kinds, contain circuit substrate (1) and be arranged on J (P1, P2, P3 on the substrate ... PJ) be laid in substrate on the corresponding connection terminal that is connected of internal circuit, it is characterized in that internal circuit is provided with " virtual earth " M as each original input signal common port; With an energy with relative interior virtual earth M input, certain frequency or pulse width difference, multichannel alternating current-direct current conversion of signals are arranged is voltage many signals superimposer (N01) of amplifying, superposeing and energy with many signals superimposer (N01) relatively the voltage signal of " virtual earth " M output be converted to current signal " voltage-current converter " (N02); P1, P2 are the positive-negative power input end of this circuit, also are the output terminals of its current signal, and P3 is public virtual earth M link; A plurality of curtages, electric charge, resistance, all original input signal S1～SN of Hall effect insert internal circuit by the relative virtual earth M of certain a few terminal in J the connection terminal and realize corresponding required the connection with circuit; " multiple signals superimposer " common port G (N01) meets virtual earth M, its output terminal OUT and virtual earth M receive " voltage-current converter " input end A, B (N02) respectively, (N02) positive output end C meets the sub-P1 of power positive end, and its negative output terminal D meets the negative terminal P2 of power supply.
- 2 one kinds of compound sensors are 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 containing the temperature sensor T (as AD590) of a constant-current source type, signal conditioning circuit contains amplifier N1, N2, resistor R 1～R7, reducing transformer R8, capacitor C 1,8 connection terminal P1～P8, N1, R1～R4, C1 forms " many signals superimposer " (N01), N2, R5～R8 forms " current-voltage converter " (N02), terminals P 8 meets P1, terminals P 7 connects the end of R2 and the end of R1, another termination virtual earth M of R1, the positive input terminal of another termination amplifier N1 of R2, terminals P 5 connects the positive input terminal of amplifier N1, resistance R 3 is connected between the negative input end and output terminal of amplifier N1, the negative input end of amplifier N1 also is connected in series capacitor C 1 connecting terminal P6 again, terminals P 4 meets virtual earth M, R4 is connected in P4, between P6, amplifier N1, the negative supply termination virtual earth M of N2, amplifier N1, the positive supply termination P1 of N2, connecting resistance R7 between virtual earth M and terminals P 2, negative input end connecting resistance R6 from 2 couples of N2 of terminals P, from the output terminal of amplifier N1 and the negative input end indirect resistance R5 of amplifier N2, meet reducing transformer R8 between the output terminal of amplifier N2 and the P1, the anodal connecting terminal P8 of temperature sensor T, its negative pole connecting terminal P7, the device Y of a responsive vibration is connected to P3, between the P5.
- 4 by the described compound sensor of claim 3, it is characterized in that the signal conditioner circuit also contains amplifier N3, its positive input terminal is received P7, its negative input end is received its output terminal makes follower, resistance R 4 reconfigurations between the output terminal of the negative input end of N1 and N3.
- 5 by the described compound sensor of claim 3, it is characterized in that also containing silicon cup formula piezoresistive pressure Sensitive Apparatus YZ, and its positive power source terminal E meets P7, negative power end F meets P4, its output terminal G or H termination P6, the other end is idle, with the G or the alternative R4 of the resistance between H and the F of pressure resistance type pressure-sensitive component.
- 6 by the described compound sensor of claim 3, it is characterized in that a kind of temperature-magneto-electric rotating speed compound sensor, and the solenoid substitutional resistance R4 of its rotating speed Sensitive Apparatus N is connected between P6, the P4 two ends.
- 7 by the described compound sensor of claim 3, it is characterized in that being temperature-Hall rotating speed compound sensor that the anode E of hall device HE meets P8, negative terminal F meets P4, half-bridge output terminal H or G meet P6, and the other end is idle, with the G or the alternative R4 of the resistance between H and the F of Hall magnetic-sensitive elements.
- 8 one kinds of detecting instruments (2) with the continued access of many signal conditioning circuits is characterized in that containing in the instrument corresponding current-voltage converter (N03) and demultiplexer (N04); The power supply E that just (bears) of instrument power source circuit connects P1 (P2) terminal to many signal conditioning circuits, the current input terminal I-of current-voltage converter (N03) inserts the electric current of another terminal P2 (or P1) output of signal conditioner circuit, (N03) another input end I+ ground connection GND, (N03) the output terminal OV voltage of GND output over the ground receives the input end IV of demultiplexer (N04), (N04) another input end grounding, (N04) carry out Signal Separation, and each signal voltage that will separate exports the subsequent conditioning circuit of instrument respectively to from its output terminal VS1～VSN.
- 9 by the described detecting instrument of claim 8, it is characterized in that current-voltage converter (N03) contains amplifier N4 and resistance R 9, demultiplexer contains amplifier N5, resistance R 10, R11, capacitor C 10, C11, instrument is powered to the P1 terminal with positive supply E, cause the negative input end I-of N4 from the electric current of P2 terminal output, resistance R 9 is connected between the negative input end and output terminal of N4, the positive input terminal I+ ground connection of N4; The negative input end of amplifier N5 is connected with the output terminal of N4 through resistance R 10, and resistance R 11, capacitor C 11 are connected between the negative input end and output terminal of N5 in parallel, the positive input terminal ground connection of N5; The output terminal of N4 excludes DC component output vibration AC signal SYOUT through capacitor C10, output terminal output filtering positive polarity d. c. voltage signal AC compounent, corresponding temperature the SWOUT of N5.
- 10 by the described detecting instrument of claim 8, it is characterized in that current-voltage converter (N03) contains amplifier N4 and resistance R 9, demultiplexer contains C10, C12, R12, instrument is powered to many signal conditioning circuits P2 terminal with negative supply E, guide the negative input end I-of N4 into from the electric current of P1 terminal output, resistance R 9 is connected between the negative input end and output terminal of N4, the positive input terminal I+ ground connection of N4; The output terminal of N4 excludes flip-flop through capacitor C 10, output AC signal SYOUT, the output terminal connecting resistance R12 of N4, another termination capacitor C 12 of R12 is to ground, from R12, C12 tie point output filtering positive polarity d. c. voltage signal AC compounent, corresponding temperature SWOUT.
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| Application Number | Priority Date | Filing Date | Title |
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| CN001059920A CN100406852C (en) | 2000-04-24 | 2000-04-24 | Multi-signal processing circuit, compund sensor and following detector thereof |
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| CN001059920A CN100406852C (en) | 2000-04-24 | 2000-04-24 | Multi-signal processing circuit, compund sensor and following detector thereof |
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| CN1274075A true CN1274075A (en) | 2000-11-22 |
| CN100406852C CN100406852C (en) | 2008-07-30 |
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| CN001059920A Expired - Lifetime CN100406852C (en) | 2000-04-24 | 2000-04-24 | Multi-signal processing circuit, compund sensor and following detector thereof |
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| Country | Link |
|---|---|
| CN (1) | CN100406852C (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102162740A (en) * | 2010-12-14 | 2011-08-24 | 中国飞机强度研究所 | Transmitter |
| 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 |
| CN107179418A (en) * | 2016-03-11 | 2017-09-19 | 易宝股份有限公司 | Use the Speed Detection Technology in multi task process path |
| 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 |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0940917B1 (en) * | 1993-09-20 | 2004-12-08 | 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 | Multipath high-power discharge pulse transient parameter monitoring system |
| 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 | Vibration and resonance demodulation fault detector |
| CN1141588C (en) * | 1999-06-24 | 2004-03-10 | 谭维克 | Capacitance detecting circuit and its application |
-
2000
- 2000-04-24 CN CN001059920A patent/CN100406852C/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102162740A (en) * | 2010-12-14 | 2011-08-24 | 中国飞机强度研究所 | Transmitter |
| CN102162740B (en) * | 2010-12-14 | 2012-10-10 | 中国飞机强度研究所 | Transmitter |
| CN107179418A (en) * | 2016-03-11 | 2017-09-19 | 易宝股份有限公司 | Use the Speed Detection Technology in multi task process path |
| CN107179418B (en) * | 2016-03-11 | 2020-01-21 | 易宝股份有限公司 | Speed detection technique 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100406852C (en) | 2008-07-30 |
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