CN111380605B - Sensor signal conditioning circuit for measuring vibration speed based on IEPE (IEPE) adapter - Google Patents
Sensor signal conditioning circuit for measuring vibration speed based on IEPE (IEPE) adapter Download PDFInfo
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- CN111380605B CN111380605B CN202010424558.8A CN202010424558A CN111380605B CN 111380605 B CN111380605 B CN 111380605B CN 202010424558 A CN202010424558 A CN 202010424558A CN 111380605 B CN111380605 B CN 111380605B
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- 230000003750 conditioning effect Effects 0.000 title claims abstract description 30
- 230000001133 acceleration Effects 0.000 claims abstract description 33
- 239000003990 capacitor Substances 0.000 claims description 24
- 230000005669 field effect Effects 0.000 claims description 15
- 230000000087 stabilizing effect Effects 0.000 claims description 5
- 230000035945 sensitivity Effects 0.000 abstract description 11
- 230000005540 biological transmission Effects 0.000 abstract description 7
- 238000005259 measurement Methods 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H11/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties
- G01H11/06—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties by electric means
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
The invention discloses a sensor signal conditioning circuit for measuring vibration speed based on an IEPE (IEPE) adapter, which comprises an acceleration voltage signal amplifying circuit, an integrating circuit and a bias voltage conditioning circuit; the acceleration voltage signal amplifying circuit is connected with the integrating circuit and the bias voltage conditioning circuit; the integrating circuit is connected with the bias voltage conditioning circuit. The invention realizes the measurement of vibration speed and solves the problems of long-distance transmission signal attenuation and speed sensitivity difference of speed voltage signals.
Description
Technical Field
The invention relates to the technical field of signal detection, in particular to a sensor signal conditioning circuit for measuring vibration speed based on an IEPE (IEPE) adapter.
Background
In engineering mechanics experiments, the accurate measurement of vibration speed has very important significance. However, the existing vibration sensor is generally an acceleration sensor, the output signal is an acceleration signal, and the voltage signal is attenuated and is easy to be interfered when long-distance transmission is carried out; even if the acceleration sensors are produced under the same process, the acceleration sensitivity of the acceleration sensors is still different from the uniform value, and the sensitivity difference of the individual sensors is very large, so that the sensitivity difference of the finally obtained speed is also very large.
Disclosure of Invention
The invention aims to solve the problems and provide a sensor signal conditioning circuit for measuring vibration speed based on an IEPE (IEPE) adapter, which comprises an acceleration voltage signal amplifying circuit, an integrating circuit and a bias voltage conditioning circuit; the acceleration voltage signal amplifying circuit is connected with the integrating circuit and the bias voltage conditioning circuit; the integrating circuit is connected with the bias voltage conditioning circuit. The acceleration voltage signal amplifying circuit is used for amplifying an input acceleration voltage signal; the integrating circuit is used for integrating the acceleration voltage signal to obtain a speed voltage signal; the bias voltage conditioning circuit is used for adjusting the output voltage of the IEPE.
The invention has the beneficial effects that: the invention has simple circuit and low cost, realizes the measurement of vibration speed, solves the problems of signal attenuation and speed sensitivity difference of long-distance transmission of speed and voltage signals, and realizes the long-distance transmission of speed and voltage signals and the unification of speed sensitivity.
Drawings
FIG. 1 is a schematic diagram of a system of the present invention;
fig. 2 is a circuit diagram of the present invention.
In the figure: c1-a first capacitance; c2-a second capacitance; a C3-third capacitor; c4-fourth capacitance; u1-an operational amplifier; u2-triode; u3-field effect transistor; d-zener diode; r1-a first resistor; r2-a second resistor; r3-a third resistor; r4-fourth resistor; r5-fifth resistor; r6-sixth resistance; r7-seventh resistor; r8-eighth resistor; r9-ninth resistance; r10-tenth resistor; r11-eleventh resistor.
Detailed Description
The invention is further described below with reference to the accompanying drawings:
As shown in figure 1, the sensor signal conditioning circuit for measuring vibration speed based on the IEPE adapter comprises an acceleration voltage signal amplifying circuit, an integrating circuit and a bias voltage conditioning circuit; the acceleration voltage signal amplifying circuit is connected with the integrating circuit and the bias voltage conditioning circuit; the integrating circuit is connected with the bias voltage conditioning circuit. The acceleration voltage signal amplifying circuit is used for amplifying an input acceleration voltage signal; the integrating circuit is used for integrating the acceleration voltage signal to obtain a speed voltage signal; the bias voltage conditioning circuit is used for adjusting the output voltage of the IEPE.
Specifically, the acceleration voltage signal amplifying circuit comprises a first resistor, a first capacitor, an operational amplifier, a second resistor, a third resistor, a fourth resistor and a zener diode; the first end of the first resistor is used for inputting an acceleration voltage signal; the second end of the first resistor is connected with the first end of the second resistor and the first same-direction input end of the operational amplifier through a first capacitor; the second end of the third resistor is connected with the first end of the fourth resistor and the first reverse input end of the operational amplifier; the second end of the fourth resistor is connected with the first output end of the operational amplifier and the first input end of the integrating circuit; the power input end of the operational amplifier is connected with the power input end of the bias voltage conditioning circuit; the second output end of the operational amplifier is connected with the second input end of the integrating circuit; the first end of the third resistor and the second end of the second resistor are connected with the cathode of the zener diode; the positive electrode of the voltage stabilizing diode is grounded.
The integrating circuit comprises a sixth resistor, a seventh resistor, a second capacitor and a third capacitor; the first output end of the operational amplifier is connected with the first end of the second capacitor and the first end of the third capacitor through a sixth resistor; the second end of the second capacitor is connected with the second end of the seventh resistor and the second reverse input end of the operational amplifier; the first end of the seventh resistor is connected with the second end of the third capacitor and the second output end of the operational amplifier.
Specifically, the bias voltage conditioning circuit comprises an eighth resistor, a fourth capacitor, a ninth resistor, a tenth resistor, an eleventh resistor, a triode and a field effect tube; the output end of the integrating circuit is connected with the first end of the fourth capacitor through an eighth resistor; the second end of the fourth capacitor is connected with the second end of the ninth resistor, the base electrode of the triode and the first end of the tenth resistor; the power input end of the operational amplifier is connected with the first end of the ninth resistor, the collector electrode of the triode and the drain electrode of the field effect transistor; the triode emitter is connected with the grid electrode of the field effect transistor and the first end of the eleventh resistor; the second end of the tenth resistor and the second end of the eleventh resistor are grounded; the source electrode of the field effect transistor is connected with the first input end of the acceleration voltage signal amplifying circuit, namely the first end of the third resistor, the second end of the second resistor and the cathode of the zener diode; the bias voltage conditioning circuit enables the zener diode to be in a normal working state by adjusting the sizes of the ninth resistor, the tenth resistor and the eleventh resistor, and the zener diode provides voltage for the first end of the third resistor, so that the voltage of the first reverse input end of the operational amplifier is adjusted. The second homodromous input end of the operational amplifier is also connected with a fifth resistor; the second equidirectional input end of the operational amplifier is connected with the cathode of the zener diode through a fifth resistor. The IEPE constant current source supplies power for the power input end, the field effect transistor and the triode of the operational amplifier.
And a source electrode of the field effect tube in the bias voltage conditioning circuit is connected with a cathode of the voltage stabilizing diode, and an anode of the voltage stabilizing diode is grounded, so that the voltage is stabilized.
As shown in fig. 2, the OUT terminal is a power supply terminal of the IEPE constant current source of the device and is also an output signal acquisition terminal of the circuit. The sensor signal conditioning circuit is powered by the IEPE constant current source and obtains signals, so that long-distance transmission of the signals can be realized.
The operational amplifier adopts a rail-to-rail dual operational amplifier, and comprises an operational stage and an integration stage. The acceleration voltage signal is input from the input end of the first resistor, enters the first stage (amplifying stage) of the operational amplifier, obtains the amplified acceleration voltage signal through the impedance transformation of the amplifying stage and the action of the feedback resistor, and realizes the speed sensitivity unification by adjusting the proportional relation between the two feedback resistors of the third resistor and the fourth resistor. Then the integrated speed voltage signal is obtained by the action of a feedback capacitor and a resistor after entering a second stage (an integration stage) of the operational amplifier; the speed voltage signal enters a triode and a field effect tube, the variable speed voltage signal is obtained at the drain electrode of the field effect tube, and the variable speed voltage signal is output through an output end.
The bias voltage conditioning circuit is used for adjusting the power supply voltage of the operational amplifier, the triode and the field effect transistor. By adjusting the ninth resistor, the tenth resistor and the eleventh resistor, the static working points of the operational amplifier, the triode and the field effect transistor can be in a stable working state, and the output voltage of the IEPE is stabilized at 8-12V.
The input acceleration voltage signal of the IN end of the circuit is amplified by the operational amplifier to obtain an amplified acceleration voltage signal, the acceleration voltage signal is integrated into a speed voltage signal by the integrating circuit, and finally the voltage signal is taken OUT of the OUT end. The speed voltage sensitivity is measured, and the vibration speed is obtained by dividing the voltage signal obtained from the OUT terminal of the present circuit by the speed voltage sensitivity.
The invention has simple circuit and low cost, realizes the measurement of vibration speed, solves the problems of signal attenuation and speed sensitivity difference of long-distance transmission of speed and voltage signals, and realizes the long-distance transmission of speed and voltage signals and the unification of speed sensitivity.
The technical scheme of the invention is not limited to the specific embodiment, and all technical modifications made according to the technical scheme of the invention fall within the protection scope of the invention.
Claims (1)
1. The sensor signal conditioning circuit for measuring the vibration speed based on the IEPE adapter is characterized by comprising an acceleration voltage signal amplifying circuit, an integrating circuit and a bias voltage conditioning circuit; the acceleration voltage signal amplifying circuit is connected with the integrating circuit and the bias voltage conditioning circuit; the integrating circuit is connected with the bias voltage conditioning circuit, and the acceleration voltage signal amplifying circuit is used for amplifying an input acceleration voltage signal; the integrating circuit is used for integrating the acceleration voltage signal to obtain a speed voltage signal; the bias voltage conditioning circuit is used for adjusting the output voltage of the IEPE;
The acceleration voltage signal amplifying circuit comprises a first resistor, a first capacitor, an operational amplifier, a second resistor, a third resistor, a fourth resistor and a zener diode; the first end of the first resistor is used for inputting an acceleration voltage signal; the second end of the first resistor is connected with the first end of the second resistor and the first same-direction input end of the operational amplifier through a first capacitor; the second end of the third resistor is connected with the first end of the fourth resistor and the first reverse input end of the operational amplifier; the second end of the fourth resistor is connected with the first output end of the operational amplifier and the first input end of the integrating circuit; the power input end of the operational amplifier is connected with the power input end of the bias voltage conditioning circuit; the second output end of the operational amplifier is connected with the second input end of the integrating circuit; the first end of the third resistor and the second end of the second resistor are connected with the cathode of the zener diode; the positive electrode of the voltage stabilizing diode is grounded;
The integrating circuit comprises a sixth resistor, a seventh resistor, a second capacitor and a third capacitor; the first output end of the operational amplifier is connected with the first end of the second capacitor and the first end of the third capacitor through a sixth resistor; the second end of the second capacitor is connected with the second end of the seventh resistor and the second reverse input end of the operational amplifier; the first end of the seventh resistor is connected with the second end of the third capacitor and the second output end of the operational amplifier;
The bias voltage conditioning circuit comprises an eighth resistor, a fourth capacitor, a ninth resistor, a tenth resistor, an eleventh resistor, a triode and a field effect transistor; the output end of the integrating circuit is connected with the first end of the fourth capacitor through an eighth resistor; the second end of the fourth capacitor is connected with the second end of the ninth resistor, the base electrode of the triode and the first end of the tenth resistor; the power supply input end of the acceleration voltage signal amplifying circuit is connected with the first end of the ninth resistor, the collector electrode of the triode and the drain electrode of the field effect transistor; the triode emitter is connected with the grid electrode of the field effect transistor and the first end of the eleventh resistor; the second end of the tenth resistor and the second end of the eleventh resistor are grounded; the source electrode of the field effect transistor is connected with the first end of the third resistor, the second end of the second resistor and the cathode of the zener diode; the second homodromous input end of the operational amplifier is also connected with a fifth resistor; the second homodromous input end of the operational amplifier is connected with the cathode of the voltage stabilizing diode through a fifth resistor; the IEPE constant current source supplies power for the power input end, the field effect transistor and the triode of the operational amplifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010424558.8A CN111380605B (en) | 2020-05-19 | 2020-05-19 | Sensor signal conditioning circuit for measuring vibration speed based on IEPE (IEPE) adapter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010424558.8A CN111380605B (en) | 2020-05-19 | 2020-05-19 | Sensor signal conditioning circuit for measuring vibration speed based on IEPE (IEPE) adapter |
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| Publication Number | Publication Date |
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| CN111380605A CN111380605A (en) | 2020-07-07 |
| CN111380605B true CN111380605B (en) | 2024-07-23 |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN211740386U (en) * | 2020-05-19 | 2020-10-23 | 中国工程物理研究院总体工程研究所 | Sensor signal conditioning circuit based on IEPE (emitter edge detector) adapter for measuring vibration speed |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW200614846A (en) * | 2004-09-24 | 2006-05-01 | Hosiden Corp | Signal amplifying circuit and acceleration sensor having the same |
| WO2006129712A1 (en) * | 2005-06-01 | 2006-12-07 | Citizen Holdings Co., Ltd. | Physical amount sensor |
| CN201307123Y (en) * | 2008-12-05 | 2009-09-09 | 祁金玉 | Primary instrument with combination of vibration speed and temperature |
| EP2343507B1 (en) * | 2009-12-24 | 2012-11-28 | EM Microelectronic-Marin SA | Method of capacitively measuring a physical parameter and electronic circuit to interface with a capacitive sensor |
| CN103323100B (en) * | 2013-05-24 | 2014-12-10 | 江阴市江凌科技有限公司 | Vibration amplitude measuring circuit |
| CN104568242B (en) * | 2014-12-09 | 2017-04-05 | 太原航空仪表有限公司 | The small-sized resonant vibration barrel pressure pickup signal conditioning circuit of piezoelectric excitation |
| JP6314813B2 (en) * | 2014-12-16 | 2018-04-25 | 株式会社デンソー | Acceleration sensor |
| CN105048864A (en) * | 2015-08-24 | 2015-11-11 | 哈尔滨工业大学 | Novel error-amplification-type piezoelectric ceramic driving circuit |
| CN105092894B (en) * | 2015-09-09 | 2018-02-27 | 南京林业大学 | A kind of piezoelectric acceleration sensor signal conversion circuit of Impetus of Current Source |
| CN209055214U (en) * | 2018-11-15 | 2019-07-02 | 郑州易度传感技术有限公司 | A vibration velocity sensor circuit |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN211740386U (en) * | 2020-05-19 | 2020-10-23 | 中国工程物理研究院总体工程研究所 | Sensor signal conditioning circuit based on IEPE (emitter edge detector) adapter for measuring vibration speed |
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