CN103471765A - Underwater dynamic pressure sensor signal conditioning circuit - Google Patents
Underwater dynamic pressure sensor signal conditioning circuit Download PDFInfo
- Publication number
- CN103471765A CN103471765A CN2013104043552A CN201310404355A CN103471765A CN 103471765 A CN103471765 A CN 103471765A CN 2013104043552 A CN2013104043552 A CN 2013104043552A CN 201310404355 A CN201310404355 A CN 201310404355A CN 103471765 A CN103471765 A CN 103471765A
- Authority
- CN
- China
- Prior art keywords
- resistance
- capacitor
- circuit
- amplifier
- power supply
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Amplifiers (AREA)
Abstract
The invention discloses an underwater dynamic pressure sensor signal conditioning circuit. The underwater dynamic pressure sensor signal conditioning circuit comprises a power circuit, an amplification and filter circuit and an output interface circuit; the power circuit provides a stable +15V power supply and a stable -15V power supply for the amplification and filter circuit and provides a stable +10V power supply for a sensitive element of a pressure sensor; the amplification and filter circuit comprises a zero position and full volume debugging circuit and an 8-order Butterworth lowpass filter circuit, wherein a positive output signal V+ and a negative output signal V- of the sensitive element of the pressure sensor are input into the zero position and full volume debugging circuit, a voltage output signal Vout2 of the zero position and full volume debugging circuit is input into the 8-order Butterworth lowpass filter circuit, and a voltage signal output by the 8-order Butterworth lowpass filter circuit is input into the output interface circuit. The underwater dynamic pressure sensor signal conditioning circuit is wide in frequency response range, high in reliability and safety, and capable of realizing measurement of underwater dynamic pressure signals with the frequency band ranging from 0 kHz to 5 kHz.
Description
Technical field
The invention belongs to electronic measuring technology field, be specifically related to a kind of signal conditioning circuit of dynamic pressure transducer under water.
Background technology
In fields such as space flight, aviation, weapon, boats and ships, pressure transducer is widely used.General space telemetry pressure transducer is mainly measured gradual pressure signal, and Hz-KHz mostly is below 100Hz.Under some special measurement environment, as the pressure of crumbling and fall of cavity under water, this compression shock rise time is fast, and the duration is short, and surge pressure is high, and frequency response generally can reach KHz, i.e. so-called high frequency dynamic pressure.The measurement effects on surface loading analysis of dynamic pressure signal and verify significant.
Summary of the invention
Technical matters to be solved by this invention is: a kind of reliability and the safe signal conditioning circuit of dynamic pressure transducer under water are provided, have been used for mating employing and are bordering on the thin film strain formula pressure-sensing device that flushes installation; Can realize the dynamic pressure signal measurement under water of 0-5kHz frequency range.
Technical scheme of the present invention is:
A kind of signal conditioning circuit of dynamic pressure transducer under water, comprise power circuit, filtering and amplifying circuit and output interface circuit, power circuit for filtering and amplifying circuit provide stable+15V and-the 15V power supply; The sensitive element that power circuit is pressure transducer provides stable+10V power supply; Filtering and amplifying circuit comprises zero-bit and completely measures debug circuit and 8 rank Butterworth low-pass filter circuits, the positive output signal V of the sensitive element of pressure transducer
+, negative output signal V
-input to respectively zero-bit and completely measure debug circuit, zero-bit reaches the Voltage-output signal Vout2 that completely measures debug circuit and inputs to 8 rank Butterworth low-pass filter circuits, and the filtered voltage signal of 8 rank Butterworth low-pass filter circuits outputs inputs to described output interface circuit;
Power circuit comprises commutation diode V1-V2, resistance R 1-R2, capacitor C 1-C8, three end reference source G1, power supply+15VIN end is connected with the anode of commutation diode V1, the negative electrode of commutation diode V1 is connected with an end of resistance R 1, the other end of resistance R 1 respectively with the input end of three end reference source G1, one end of capacitor C 2, one end of capacitor C 3 is connected, an end stable output by described capacitor C 3+the 15V power supply, the other end of capacitor C 2 with the GND end of power supply, be connected after the other end of capacitor C 3 is connected, the other end of capacitor C 2 is connected with an end of capacitor C 7, the other end of capacitor C 7 is connected with an end of resistance R 2, the other end of capacitor C 3 is connected with an end of capacitor C 8, the other end of capacitor C 8 is connected with an end of resistance R 2, other end stable output by described capacitor C 8-the 15V power supply, the other end of resistance R 2 is connected with the anode of commutation diode V2, the negative electrode of commutation diode V2 and power supply-the 15VIN end is connected, power supply+15VIN end connects mechanically JXD by capacitor C 1, power supply-15VIN end connects mechanically JXD by capacitor C 6, the GND end of power supply connects mechanically JXD by capacitor C 5, output terminal stable output by three end reference source G1+the 10V power supply, the output terminal of three end reference source G1 is connected with the ground end of three end reference source G1 by capacitor C 4, the ground end of three end reference source G1 is connected with the GND of power supply end,
Zero-bit and completely measure debug circuit and comprise that wherein said differential amplifier circuit comprises resistance R 3-R7, resistance R 6T, amplifier N1A for the differential amplifier circuit of zero-bit debugging with for the see-saw circuit of full amount debugging; Described see-saw circuit comprises resistance R 8-R11, resistance R 10T, capacitor C 9 and amplifier N1B; The negative output terminal V of pressure transducer sensitive element
-by resistance R 3, with the negative input end of amplifier N1A, be connected, simultaneously the negative input end of amplifier N1A by resistance R 5 with the output terminal of amplifier N1A, be connected, the positive output end V of sensitive element
+by resistance R 4, with the positive input terminal of amplifier N1A, be connected, simultaneously the positive input terminal of amplifier N1A is connected with an end of resistance R 6, the other end of resistance R 6 ground connection afterwards of connecting with resistance R 6T and R7; The output terminal of amplifier N1A is connected with the positive input terminal of amplifier N1B by resistance R 8, and the negative input end of amplifier N1B is connected with an end of resistance R 9, the other end ground connection of resistance R 9; The negative input end of amplifier N1B is connected with the output terminal of amplifier N1B by capacitor C 9; The output terminal of amplifier N1B is connected with an end of resistance R 11, exports zero-bit by the other end of resistance R 11 and reaches the output signal Vout2 that completely measures debug circuit; The negative input end of amplifier N1B is connected with an end of resistance R 10, and the other end of resistance R 10 is connected with the end of resistance R 10T, and the other end of resistance R 10T is connected with the other end of described resistance R 11;
Described 8 rank Butterworth low-pass filter circuits are in series by level Four 2 rank Butterworth LPF, first adopts second order unity gain voltage controlled voltage source type filtering circuit of the same type to the third level 2 rank Butterworth LPF, and the fourth stage 2 rank Butterworth LPF increase the anti-self-excited circuit be comprised of capacitor C 18 and resistance R 20 on the basis of second order unity gain voltage controlled voltage source type filtering circuit; The negative input end of the amplifier N2D of the fourth stage 2 rank Butterworth LPF is connected with the output terminal of amplifier N2D by capacitor C 18, and the output terminal of amplifier N2D is by the voltage signal after resistance R 20 output filterings;
Output interface circuit comprises voltage adjustment diode V3, silicon Schotty diode V4, current-limiting resistance R21 and capacitor C 19; The negative electrode of voltage adjustment diode V3, silicon Schotty diode V4 is connected with filtered voltage signal respectively, and the anode of voltage adjustment diode V3, silicon Schotty diode V4 connects respectively the GND end of power supply; The end of current-limiting resistance R21 is connected with signal after filtering, and the other end of current-limiting resistance R21 is connected with an end of capacitor C 19, and the other end of capacitor C 19 meets mechanically JXD, and an end of wherein said capacitor C 19 is as the signal output part of signal conditioning circuit.
The present invention's advantage compared with prior art is:
(1) Hz-KHz is wide.The present invention measures mainly for the cavity dynamic pressure signal of crumbling and fall.This pressure signal rise time is fast, and the duration is short, and surge pressure is high, and this just requires signal conditioning circuit to have higher Hz-KHz.Signal conditioning circuit of the present invention adopts 8 rank Butterworth low-pass filter circuits, has designed the 5kHz low-pass filter circuit, and guarantees flatness and attenuation outside a channel speed in passband as far as possible.
(2) there is higher reliability and security.The present invention has taken into full account the environment service factor of circuit when design.At first power supply has been carried out to anti-reverse, current limliting, voltage stabilizing, decoupling equistability and processed, secondly operational amplifier has increased anti-self-excited circuit, and at output terminal Finite Amplitude and isolation circuit.By these effective measures, improved reliability and the security of circuit.
The accompanying drawing explanation
Fig. 1 is the present invention's dynamic pressure transducer signal conditioning circuit theory diagram under water;
Fig. 2 is the power circuit schematic diagram;
Fig. 3 is zero-bit and completely measures the debug circuit schematic diagram;
Fig. 4 is 8 rank Butterworth low-pass filter circuit schematic diagram;
Fig. 5 is the output interface circuit schematic diagram.
Embodiment
Below just by reference to the accompanying drawings the present invention is described further.
As shown in Figure 1, signal conditioning circuit of the present invention mainly comprises power circuit, filtering and amplifying circuit, output interface circuit.Power circuit suppresses the ripple and the interference that exist in electric power system, for signal conditioning circuit and sensitive element provide stable ± 15V and+the 10V power supply.Filtering and amplifying circuit adopts zero-bit to reach and completely measures debug circuit, 8 rank Butterworth low-pass filter circuits are nursed one's health into the Voltage-output of (0～5) V by the small-signal of sensitive element output, and has amplitude-frequency and the phase-frequency characteristic of corresponding requirements.The security of the output interface circuit output interface circuit that utilized amplitude limiter circuit and isolation circuit to guarantee and the system input interface that matches.
As shown in Figure 2, power circuit comprises commutation diode V1-V2, resistance R 1-R2, capacitor C 1-C8, three end reference source G1, power supply+15VIN end is connected with the anode of commutation diode V1, the negative electrode of commutation diode V1 is connected with an end of resistance R 1, the other end of resistance R 1 respectively with the input end of three end reference source G1, one end of capacitor C 2, one end of capacitor C 3 is connected, an end stable output by described capacitor C 3+the 15V power supply, the other end of capacitor C 2 with the GND end of power supply, be connected after the other end of capacitor C 3 is connected, the other end of capacitor C 2 is connected with an end of capacitor C 7, the other end of capacitor C 7 is connected with an end of resistance R 2, the other end of capacitor C 3 is connected with an end of capacitor C 8, the other end of capacitor C 8 is connected with an end of resistance R 2, other end stable output by described capacitor C 8-the 15V power supply, the other end of resistance R 2 is connected with the anode of commutation diode V2, the negative electrode of commutation diode V2 and power supply-the 15VIN end is connected, power supply+15VIN end connects mechanically JXD by capacitor C 1, power supply-15VIN end connects mechanically JXD by capacitor C 6, the GND end of power supply connects mechanically JXD by capacitor C 5, output terminal stable output by three end reference source G1+the 10V power supply, the output terminal of three end reference source G1 is connected with the ground end of three end reference source G1 by capacitor C 4, the ground end of three end reference source G1 is connected with the GND of power supply end.Wherein commutation diode V1 and V2, can effectively prevent+15VIN and-infringement that the 15VIN reverse power connection brings circuit.And diode has the characteristic of one-way conduction, so V1 and V2 also have certain ability that reduces power supply differential mode interference signal.Power supply+15VIN ,-15VIN and GND be connected mechanically JXD by be situated between little capacitor C 1, C5, C6 of radioceramic, the high frequency interference that such method of attachment exists in can filter out power.Resistance R 1 and R2 are current-limiting resistance, while in circuit, having instantaneous high pressure, can reduce the momentary current in circuit, can prevent that in circuit, large electric current moves back in power supply simultaneously.Capacitor C 2, C3, C7, C8 have the decoupling effect, and wherein C2, C7 are tantalum electric capacity, and C3, C8 are the radioceramic little electric capacity that is situated between.The radioceramic little electric capacity that is situated between can absorb the high frequency interference of MHz magnitude, and tantalum electric capacity can absorb the undesired signal of kHz magnitude.Three end reference source G1 and decoupling capacitor C4 can be provide accurately+10V of pressure-sensing device reference voltage source, and G1 for example can adopt the reference source chip AD581SH of ADI company.
As shown in Figure 3, zero-bit of the present invention reaches and completely measures debug circuit, comprises that wherein said differential amplifier circuit comprises resistance R 3-R7, resistance R 6T, amplifier N1A for the differential amplifier circuit of zero-bit debugging and the see-saw circuit of debugging for full amount; Described see-saw circuit comprises resistance R 8-R11, resistance R 10T, capacitor C 9 and amplifier N1B; The negative output terminal V of pressure transducer sensitive element
-by resistance R 3, with the negative input end of amplifier N1A, be connected, simultaneously the negative input end of amplifier N1A by resistance R 5 with the output terminal of amplifier N1A, be connected, the positive output end V of sensitive element
+by resistance R 4, with the positive input terminal of amplifier N1A, be connected, simultaneously the positive input terminal of amplifier N1A is connected with an end of resistance R 6, the other end of resistance R 6 ground connection afterwards of connecting with resistance R 6T and R7; The output terminal of amplifier N1A is connected with the positive input terminal of amplifier N1B by resistance R 8, and the negative input end of amplifier N1B is connected with an end of resistance R 9, the other end ground connection of resistance R 9; The negative input end of amplifier N1B is connected with the output terminal of amplifier N1B by capacitor C 9; The output terminal of amplifier N1B is connected with an end of resistance R 11, exports zero-bit by the other end of resistance R 11 and reaches the output signal Vout2 that completely measures debug circuit; The negative input end of amplifier N1B is connected with an end of resistance R 10, and the other end of resistance R 10 is connected with the end of resistance R 10T, and the other end of resistance R 10T is connected with the other end of described resistance R 11.Output capacitor C9 and resistance R 11 form the phase compensation link of amplifying circuit, can effectively prevent the generation of amplifying circuit self-excitation phenomena.In circuit, Vout1, Vout2 computation process are:
R5=R7 in formula, R3=R4.R6, R6T, R10, R10T are adjusting resistance, during adjustment, can replace with potentiometer.When circuit is input as the zero-bit of sensitive element or completely measures output, adjustment R6, R6T, R10, R10T make Vout2 meet zero-bit and full output requirement of measuring simultaneously.
As shown in Figure 4,8 rank Butterworth low-pass filter circuits of the present invention are in series by level Four 2 rank Butterworth LPF, first adopts second order unity gain voltage controlled voltage source type filtering circuit of the same type to the third level 2 rank Butterworth LPF, and each second order unity gain voltage controlled voltage source type filtering circuit is comprised of two resistance, two electric capacity and an amplifier; The fourth stage 2 rank Butterworth LPF increase the anti-self-excited circuit be comprised of capacitor C 18 and resistance R 20 on the basis of second order unity gain voltage controlled voltage source type filtering circuit; The negative input end of the amplifier N2D of the fourth stage 2 rank Butterworth LPF is connected with the output terminal of amplifier N2D by capacitor C 18, and the output terminal of amplifier N2D is by the voltage signal after resistance R 20 output filterings.For meeting other frequency response requirement of hydrodynamic pressure signal kHz level, the filtering parameter account form of each low-pass filter circuit is identical, and first filtering circuit parameter calculation procedure is:
ω in formula
0for natural frequency, Q is quality factor.In actual using, the size of nominal resistance, capacitance can be determined by Filter solutions filtering circuit design software, utilize the Multisim circuit simulating software to carry out frequency response emulation, and come adjusting resistance, capacitance according to amplitude versus frequency characte and the phase-frequency characteristic measured, the amplitude-frequency of circuit and phase frequency parameter are met the demands.
The output terminal of the fourth stage 2 rank Butterworth LPF consists of the phase compensation link of filtering circuit capacitor C 18 and resistance R 20, can effectively prevent the generation of amplifying circuit self-excitation phenomena.
As shown in Figure 5, output interface circuit of the present invention comprises voltage adjustment diode V3, silicon Schotty diode V4, current-limiting resistance R21 and capacitor C 19; The negative electrode of voltage adjustment diode V3, silicon Schotty diode V4 is connected with filtered voltage signal respectively, and the anode of voltage adjustment diode V3, silicon Schotty diode V4 connects respectively the GND end of power supply; The end of current-limiting resistance R21 is connected with signal after filtering, and the other end of current-limiting resistance R21 is connected with an end of capacitor C 19, and the other end of capacitor C 19 meets mechanically JXD, and an end of wherein said capacitor C 19 is as the signal output part of signal conditioning circuit.Voltage adjustment diode V3 and silicon Schotty diode V4 form amplitude limiter circuit, and while when the abnormal saltus step of circuit output voltage, surpassing specialized range, amplitude limiter circuit can be by its clamper in the limiting voltage scope, the magnitude of voltage of avoiding output voltage to surpass requiring.On output interface circuit short circuit or misconnection, during large voltage, current-limiting resistance R21 can absorb most electric current, prevents burning out of whole circuit.Capacitor C 19 is little capacitor C 19 for radioceramic is situated between, and has the decoupling effect, the high-frequency interferencing signal effectively existed in the filtering output voltage.
The unspecified part of the present invention belongs to general knowledge as well known to those skilled in the art.
Claims (2)
1. a dynamic pressure transducer signal conditioning circuit under water, it is characterized in that, modulate circuit comprises power circuit, filtering and amplifying circuit and output interface circuit, power circuit for filtering and amplifying circuit provide stable+15V and-the 15V power supply, and provide stable+10V power supply for the sensitive element of pressure transducer; Filtering and amplifying circuit comprises zero-bit and completely measures debug circuit and 8 rank Butterworth low-pass filter circuits, the positive output signal V of the sensitive element of pressure transducer
+, negative output signal V
-input to zero-bit and completely measure debug circuit, zero-bit reaches the Voltage-output signal Vout2 that completely measures debug circuit and inputs to 8 rank Butterworth low-pass filter circuits, and the voltage signal of 8 rank Butterworth low-pass filter circuits outputs inputs to described output interface circuit;
Power circuit comprises commutation diode V1-V2, resistance R 1-R2, capacitor C 1-C8, three end reference source G1, power supply+15VIN end is connected with the anode of commutation diode V1, the negative electrode of commutation diode V1 is connected with an end of resistance R 1, the other end of resistance R 1 respectively with the input end of three end reference source G1, one end of capacitor C 2, one end of capacitor C 3 is connected, an end stable output by described capacitor C 3+the 15V power supply, the other end of capacitor C 2 with the GND end of power supply, be connected after the other end of capacitor C 3 is connected, the other end of capacitor C 2 is connected with an end of capacitor C 7, the other end of capacitor C 7 is connected with an end of resistance R 2, the other end of capacitor C 3 is connected with an end of capacitor C 8, the other end of capacitor C 8 is connected with an end of resistance R 2, other end stable output by described capacitor C 8-the 15V power supply, the other end of resistance R 2 is connected with the anode of commutation diode V2, the negative electrode of commutation diode V2 and power supply-the 15VIN end is connected, power supply+15VIN end connects mechanically JXD by capacitor C 1, power supply-15VIN end connects mechanically JXD by capacitor C 6, the GND end of power supply connects mechanically JXD by capacitor C 5, output terminal stable output by three end reference source G1+the 10V power supply, the output terminal of three end reference source G1 is connected with the ground end of three end reference source G1 by capacitor C 4, the ground end of three end reference source G1 is connected with the GND of power supply end,
Zero-bit and completely measure debug circuit and comprise that wherein said differential amplifier circuit comprises resistance R 3-R7, resistance R 6T, amplifier N1A for the differential amplifier circuit of zero-bit debugging with for the see-saw circuit of full amount debugging; Described see-saw circuit comprises resistance R 8-R11, resistance R 10T, capacitor C 9 and amplifier N1B; The negative output terminal V of pressure transducer sensitive element
-by resistance R 3, with the negative input end of amplifier N1A, be connected, simultaneously the negative input end of amplifier N1A by resistance R 5 with the output terminal of amplifier N1A, be connected, the positive output end V of sensitive element
+by resistance R 4, with the positive input terminal of amplifier N1A, be connected, simultaneously the positive input terminal of amplifier N1A is connected with an end of resistance R 6, the other end of resistance R 6 ground connection afterwards of connecting with resistance R 6T and R7; The output terminal of amplifier N1A is connected with the positive input terminal of amplifier N1B by resistance R 8, and the negative input end of amplifier N1B is connected with an end of resistance R 9, the other end ground connection of resistance R 9; The negative input end of amplifier N1B is connected with the output terminal of amplifier N1B by capacitor C 9; The output terminal of amplifier N1B is connected with an end of resistance R 11, exports zero-bit by the other end of resistance R 11 and reaches the output signal Vout2 that completely measures debug circuit; The negative input end of amplifier N1B is connected with an end of resistance R 10, and the other end of resistance R 10 is connected with the end of resistance R 10T, and the other end of resistance R 10T is connected with the other end of described resistance R 11;
Described 8 rank Butterworth low-pass filter circuits are in series by level Four 2 rank Butterworth LPF, first adopts second order unity gain voltage controlled voltage source type filtering circuit of the same type to the third level 2 rank Butterworth LPF, and the fourth stage 2 rank Butterworth LPF increase the anti-self-excited circuit be comprised of capacitor C 18 and resistance R 20 on the basis of second order unity gain voltage controlled voltage source type filtering circuit; The negative input end of the amplifier N2D of the fourth stage 2 rank Butterworth LPF is connected with the output terminal of amplifier N2D by capacitor C 18, and the output terminal of amplifier N2D is by the voltage signal after resistance R 20 output filterings;
Output interface circuit comprises voltage adjustment diode V3, silicon Schotty diode V4, current-limiting resistance R21 and capacitor C 19; The negative electrode of voltage adjustment diode V3, silicon Schotty diode V4 is connected with filtered voltage signal respectively, and the anode of voltage adjustment diode V3, silicon Schotty diode V4 connects respectively the GND end of power supply; The end of current-limiting resistance R21 is connected with signal after filtering, and the other end of current-limiting resistance R21 is connected with an end of capacitor C 19, and the other end of capacitor C 19 meets mechanically JXD, and an end of wherein said capacitor C 19 is as the signal output part of signal conditioning circuit.
2. a kind of signal conditioning circuit of dynamic pressure transducer under water according to claim 1, is characterized in that, capacitor C 1, C5, C6 are the radioceramic little electric capacity that is situated between; Capacitor C 2, C7 are tantalum electric capacity, and capacitor C 3, C8 are the radioceramic little electric capacity that is situated between, and capacitor C 19 is little electric capacity for radioceramic is situated between.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310404355.2A CN103471765B (en) | 2013-09-06 | 2013-09-06 | Underwater dynamic pressure sensor signal conditioning circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310404355.2A CN103471765B (en) | 2013-09-06 | 2013-09-06 | Underwater dynamic pressure sensor signal conditioning circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103471765A true CN103471765A (en) | 2013-12-25 |
| CN103471765B CN103471765B (en) | 2015-07-08 |
Family
ID=49796707
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310404355.2A Active CN103471765B (en) | 2013-09-06 | 2013-09-06 | Underwater dynamic pressure sensor signal conditioning circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103471765B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104883147A (en) * | 2015-06-04 | 2015-09-02 | 西南科技大学 | Preamplifier of acoustic emission detector |
| CN105181218A (en) * | 2015-09-29 | 2015-12-23 | 中国地质科学院地质力学研究所 | Pressure measurement device and system |
| CN106813813A (en) * | 2015-11-30 | 2017-06-09 | 北京航天斯达科技有限公司 | It is a kind of can automatic response zeroing strain conditioning device |
| CN113340516A (en) * | 2021-06-07 | 2021-09-03 | 中国工程物理研究院总体工程研究所 | Pressure measuring cell |
| CN115357083A (en) * | 2022-04-22 | 2022-11-18 | 陕西电器研究所 | Phase-frequency consistency analog circuit optimization method |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2240183A (en) * | 1989-11-13 | 1991-07-24 | Nat Res Dev | Transducer signal conditioning circuit |
| US5451940A (en) * | 1989-12-20 | 1995-09-19 | Endress U. Hauser Gmbh U. Co. | Capacitive sensor signal processing arrangement using switch capacitor structures |
| US20070109064A1 (en) * | 2003-03-31 | 2007-05-17 | Suren Systems, Ltd. | Piezoelectric Transducer Signal Processing Circuit |
| CN101131334A (en) * | 2006-08-21 | 2008-02-27 | 昆山双桥传感器测控技术有限公司 | High-frequency wideband amplification circuit used for piezoresistive dynamic pressure sensor |
| CN102354084A (en) * | 2011-06-22 | 2012-02-15 | 浙江大学 | Flow field pressure transducer of immersion lithography machine based on PVDF (polyvinylidene fluoride) |
| CN202305092U (en) * | 2011-10-14 | 2012-07-04 | 桑增产 | Variable-frequency interference resistant circuit and variable-frequency interference resistant pressure transmitter |
| CN202372296U (en) * | 2011-10-19 | 2012-08-08 | 北京强度环境研究所 | Sealed waterproof absolute pressure sensor and sensor circuit thereof |
-
2013
- 2013-09-06 CN CN201310404355.2A patent/CN103471765B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2240183A (en) * | 1989-11-13 | 1991-07-24 | Nat Res Dev | Transducer signal conditioning circuit |
| US5451940A (en) * | 1989-12-20 | 1995-09-19 | Endress U. Hauser Gmbh U. Co. | Capacitive sensor signal processing arrangement using switch capacitor structures |
| US20070109064A1 (en) * | 2003-03-31 | 2007-05-17 | Suren Systems, Ltd. | Piezoelectric Transducer Signal Processing Circuit |
| CN101131334A (en) * | 2006-08-21 | 2008-02-27 | 昆山双桥传感器测控技术有限公司 | High-frequency wideband amplification circuit used for piezoresistive dynamic pressure sensor |
| CN102354084A (en) * | 2011-06-22 | 2012-02-15 | 浙江大学 | Flow field pressure transducer of immersion lithography machine based on PVDF (polyvinylidene fluoride) |
| CN202305092U (en) * | 2011-10-14 | 2012-07-04 | 桑增产 | Variable-frequency interference resistant circuit and variable-frequency interference resistant pressure transmitter |
| CN202372296U (en) * | 2011-10-19 | 2012-08-08 | 北京强度环境研究所 | Sealed waterproof absolute pressure sensor and sensor circuit thereof |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104883147A (en) * | 2015-06-04 | 2015-09-02 | 西南科技大学 | Preamplifier of acoustic emission detector |
| CN105181218A (en) * | 2015-09-29 | 2015-12-23 | 中国地质科学院地质力学研究所 | Pressure measurement device and system |
| CN106813813A (en) * | 2015-11-30 | 2017-06-09 | 北京航天斯达科技有限公司 | It is a kind of can automatic response zeroing strain conditioning device |
| CN113340516A (en) * | 2021-06-07 | 2021-09-03 | 中国工程物理研究院总体工程研究所 | Pressure measuring cell |
| CN113340516B (en) * | 2021-06-07 | 2023-03-17 | 中国工程物理研究院总体工程研究所 | Pressure measuring cell |
| CN115357083A (en) * | 2022-04-22 | 2022-11-18 | 陕西电器研究所 | Phase-frequency consistency analog circuit optimization method |
| CN115357083B (en) * | 2022-04-22 | 2023-09-15 | 陕西电器研究所 | Phase frequency consistency analog circuit optimization method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103471765B (en) | 2015-07-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103471765A (en) | Underwater dynamic pressure sensor signal conditioning circuit | |
| CN109743057B (en) | Thing networking data transmission correction equipment | |
| CN109495017B (en) | Broadband piezoelectric vibration energy collecting system | |
| CN110376989B (en) | Industrial control system based on big data | |
| CN204465483U (en) | A kind of signal processing circuit with digital regulation resistance | |
| CN108768310B (en) | Low-noise charge amplifier for piezoelectric sensor and implementation method thereof | |
| CN105486882A (en) | Detection device for MHD angular-rate sensor | |
| CN110333753B (en) | Building site information transmission system | |
| CN104242834B (en) | Receiver preamplifier nonlinear response modeling method based on higher order polynomial-fitting | |
| US8803595B2 (en) | Common mode noise cancellation circuit for unbalanced signals | |
| CN201917355U (en) | Weak signal detection circuit | |
| CN102981021B (en) | Differential capacitance-voltage conversion circuit and acceleration sensor detection system | |
| CN105571710A (en) | Acquisition circuit of airborne vibration signals of engine | |
| CN103532507A (en) | Sensor signal operational amplifier | |
| CN204556030U (en) | Multiple sensor signals acquisition processing device | |
| CN103487631A (en) | Modulation-demodulation type current sensor | |
| CN104749416A (en) | Electricity leakage detecting protecting circuit | |
| CN202918246U (en) | Preposed charge amplifier with low noise | |
| CN101764511B (en) | Pulse width modulation signal voltage converting circuit | |
| CN221202543U (en) | Signal acquisition circuit and signal acquisition equipment | |
| CN201191299Y (en) | Arbitrary waveform generating apparatus for device aging screening cart | |
| CN214591106U (en) | Direct current component signal extraction circuit based on alternating current voltage and power supply equipment | |
| CN104639077A (en) | Passive filtering and amplifying circuit | |
| US20160308691A1 (en) | System for transmitting information between circuits | |
| US2286436A (en) | Piezoelectric temperature compensating circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |