CN106706007A - Device for adjusting damping ratio of sensor - Google Patents
Device for adjusting damping ratio of sensor Download PDFInfo
- Publication number
- CN106706007A CN106706007A CN201710150847.1A CN201710150847A CN106706007A CN 106706007 A CN106706007 A CN 106706007A CN 201710150847 A CN201710150847 A CN 201710150847A CN 106706007 A CN106706007 A CN 106706007A
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- Prior art keywords
- sensor
- damping
- resistor
- resistance
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
- G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
- G01D5/16—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying resistance
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
The invention relates to a device for adjusting the damping ratio of a sensor, and the device comprises a sensor, a damping adjustment circuit and a voltage processing circuit. The output end of the sensor is connected with the input end of the damping adjustment circuit. The output end of the damping adjustment circuit is connected with the input end of the voltage processing circuit. The output end of the voltage processing circuit is connected with the output end of the sensor, and the voltage processing circuit enables a voltage difference signal of the damping adjustment circuit to be fed back to the sensor, and the sensor outputs a damping ratio signal. Compared with the prior art, the device can facilitate the change of the damping ratio of the sensor through the designing of the damping adjustment circuit and the voltage processing circuit and the changing of the parameters of the damping adjustment circuit and the voltage processing circuit. Furthermore, the device can obtain a bigger damping ratio without changing the internal mechanical structure of the sensor, does not has a resonance ratio point, and guarantees the detection accuracy of the sensor.
Description
Technical field
The present invention relates to sensor field, more particularly to a kind of sensor damping ratio adjusting apparatus.
Background technology
Moving-coil transducing inertial sensor is a kind of common vibration measurement sensor.Moving-coil transducing inertial sensor is using electricity
Magnetic induction principle, coil is placed in magnetic field, and after sensor is subject to extraneous vibration, coil is also moved therewith, coil movement cutting
The magnetic line of force produces induced electromotive force, so as to measure extraneous motion.The vibration physical quantity of moving-coil transducing inertial sensor measurement can
Being speed, or acceleration.
Not being both by the damping ratio for adjusting moving-coil transducing inertial sensor come what is realized for measurement physical quantity, works as sensor
During in small damping state, the physical quantity of sensor measurement is speed；When sensor is in big damping state, the physics of measurement
Amount is acceleration.Measurement acceleration needs to obtain larger damping ratio, at present, larger damping is obtained using the following two kinds method
Than：
First, a resistance in parallel, increases damping ratio on a sensor, constitutes speed pendulum accelerometer, and the method is one
Kind of passive servo feedback method, its deficiency is that damping is increased by way of parallel resistance is limited, general damping ratio
After being increased to 3-5, limited by sensor mechanism parameter, damping is difficult to be enlarged again, the width of sensor service band compared with
It is narrow；
Second, two groups of coils are designed on moving-coil transducing sensing element, one group is signal coil, and one group is feedback coil,
The signal of signal coil can obtain larger damping ratio in being added to feedback coil after feedback circuit using the method,
Its deficiency is the influence due to self-induction of loop and mutual inductance, and sensor has obvious resonant frequency point.
The content of the invention
Based on this, it is an object of the present invention to provide a kind of sensor damping ratio adjusting apparatus, it need not change sensing
Mechanical mechanism inside device, it is only necessary to by changing the circuit parameter in two circuits, just can easily change the resistance of sensor
Buddhist nun's ratio, obtains larger damping ratio, and be not in resonance ratio point, it is ensured that the accuracy of sensor detection.
A kind of sensor damping ratio adjusting apparatus, including sensor, damping adjustment circuit and voltage processing circuitry；The biography
The output end of sensor is connected with the input of the damping adjustment circuit；The output end and the voltage of the damping adjustment circuit
The input connection of process circuit；The output end of the voltage processing circuitry is connected with the output end of the sensor, will be described
The pressure difference signal for damping adjustment circuit feeds back to the sensor, then exports damping ratio signal by the sensor.
Compared to prior art, the present invention damps adjustment circuit and voltage processing circuitry by designing, by changing two
Circuit parameter in circuit, just can easily change the damping ratio of sensor；Further, the present invention need not change sensor
Internal mechanical mechanism, just can obtain larger damping ratio, and be not in resonance ratio point, it is ensured that sensor detection
Accuracy.
Further, the damping adjustment circuit includes first resistor, second resistance, 3rd resistor, first lead-out terminal
With the second lead-out terminal；
First output end of the sensor is connected with the first connection end of the first resistor；The of the first resistor
First connection end of two connection ends and the second resistance, the second connection end ground connection of the second resistance；The sensor
First output end is also connected by the first lead-out terminal and the second lead-out terminal with extraneous vibration signal processing circuit；It is described
First connection end of 3rd resistor is connected with second lead-out terminal, the second connection end ground connection of the 3rd resistor；It is described
Second output head grounding of sensor；Second lead-out terminal accesses institute as the first voltage output end of damping adjustment circuit
State voltage processing circuitry；Then accessed as the second voltage output end of damping adjustment circuit second connection end of the first resistor
The voltage processing circuitry.
Further, the voltage processing circuitry includes first voltage follower, second voltage follower, subtracter and puts
Big device；
The input of the first voltage follower is connected with the second connection end of the first resistor；The second voltage
The input of follower is connected with second lead-out terminal；The output of the first voltage follower and second voltage follower
End is connected with two inputs of the subtracter respectively, by the pressure difference of the subtracter output damping adjustment circuit.Institute
The output end for stating subtracter is connected with the input of the amplifier；The output end of the amplifier and the first of the sensor
Output end is connected, and then the pressure difference signal of adjustment circuit is fed back into the sensor.
Further, the first resistor, second resistance and 3rd resistor are variable resistor.
Further, the resistance of the second resistance and 3rd resistor is the 1/10-1/ of the D.C. resistance of the sensor
5。
Further, the damping ratio of the sensor increases with the increase of the multiplication factor of the amplifier.
Further, the multiplication factor of the damping ratio of the sensor and amplifier, second resistance, 3rd resistor meet such as
Lower formula：
Wherein, G is electromechanical coupling factor；K is the multiplication factor of amplifier；RsIt is the DC impedance of sensor；R=R2=
R4, wherein R2And R3The respectively resistance of second resistance and 3rd resistor；M is sensor heavy moving parts；K is sensor bullet
Property element elastic coefficient.
Compared to prior art, the present invention damps adjustment circuit and voltage processing circuitry by designing, by changing two
Circuit parameter in circuit, just can easily change the damping ratio of sensor；Further, the present invention need not change sensor
Internal mechanical mechanism, just can obtain larger damping ratio, and be not in resonance ratio point, it is ensured that sensor detection
Accuracy.
In order to more fully understand and implement, the invention will now be described in detail with reference to the accompanying drawings.
Brief description of the drawings
Fig. 1 is the equivalent circuit diagram of inventive sensor；
Fig. 2 is the present invention for adjusting the electrical block diagram of sensor damping ratio.
Specific embodiment
It is the equivalent circuit diagram of inventive sensor please refer to Fig. 1 and Fig. 2, Fig. 1；Fig. 2 is the present invention for adjusting
The electrical block diagram of sensor damping ratio.The sensor damping ratio adjusting apparatus, including sensor B, damping adjustment circuit
G1With voltage processing circuitry G2.The output end of the sensor B and the damping adjustment circuit G1Input connection；The resistance
Buddhist nun's adjustment circuit G1Output end and the voltage processing circuitry G2Input connection；The output of the voltage processing circuitry G2
End is connected with the output end of the sensor B, by the damping adjustment circuit G1Pressure difference signal feed back to the sensor B,
Damping ratio signal is exported by the sensor B again.
The damping adjustment circuit G1Including first resistor R1, second resistance R2, 3rd resistor R3, first lead-out terminal P1With
Second lead-out terminal P2。
First output end of the sensor B and the first resistor R1The first connection end connection, the first resistor R1
The second connection end and the second resistance R2The first connection end after, by the second resistance R2The second connection end ground connection.Institute
First output end of sensor B is stated also by the first lead-out terminal P1With the second lead-out terminal P2At extraneous vibration signal
Reason circuit connection；The 3rd resistor R3The first connection end and the second lead-out terminal P2Connection, by the 3rd resistor R3
The second connection end ground connection；Second output head grounding of the sensor B.The second lead-out terminal P2As damping adjustment electricity
Road G1First voltage output end access the voltage processing circuitry G2；The first resistor R1The second connection end then as resistance
Buddhist nun's adjustment circuit G1Second voltage output end access the voltage processing circuitry G2。
In the present invention, the first resistor R1, second resistance R2With 3rd resistor R3Variable resistor is, or can basis
Need in damping adjustment circuit G1The middle first resistor R for accessing different resistances1, second resistance R2With 3rd resistor R3.The present embodiment
In, the second resistance R2With 3rd resistor R3Resistance be the sensor B D.C. resistance 1/10-1/5.
The voltage processing circuitry G2Including first voltage follower N1, second voltage follower N2, subtracter Z and amplification
Device A.
The first voltage follower N1Input and the first resistor R1The second connection end connection；Described second
Voltage follower N2Input and the second lead-out terminal P2Connection；The first voltage follower N1With second voltage with
With device N2Output end be connected with two inputs of the subtracter Z respectively, by the subtracter Z output it is described damping adjustment
Circuit G1Pressure difference.The output end of the subtracter Z is connected with the input of the amplifier A；The output end of the amplifier A
The first output end with the sensor B is connected, and then the pressure difference signal of adjustment circuit is fed back into the sensor B, and then
Realize the closed loop detection and regulation to sensor B damping ratios.
Damping adjustment circuit G of the invention1With voltage processing circuitry G2It is mainly used in adjusting moving-coil transducing inertial sensor
Damping ratio, to obtain larger damping ratio, specifically, being specifically described the principle of present invention adjustment damping ratio below：
Assuming that sensor heavy moving parts are m, Sensor Elastic Element coefficient of elasticity is k, and electromechanical coupling factor is G,
The relative displacement of sensor moving component relative sensors housing is x, and the displacement for measuring vibration signal is X.It is described in the present invention
Sensor B can be equivalent to by DC impedance R in circuitsWith anti-induction electromotive force e1Composition.In damping adjustment circuit G1In, it is false
If the second lead-out terminal P2Output current be i1, its output voltage is e2；3rd resistor R3Output current be i2；Damping adjustment
Circuit G1The pressure difference of output is Δ u.In voltage processing circuitry G2In, the multiplication factor of amplifier A is K；Acceleration of gravity is g；
Then：
e1=-Gsx (2)
Wherein, damping adjustment circuit G1First voltage output end and second voltage output end be respectively：
Make Rs=R3, R2=R4=R, has according to formula (1) and formula (3)：
Laplce's equation of motion of sensor B is：
(ms2+k)x-Gi1=ms2X (5)
Wherein, s is complex variable.
According to formula (1) and formula (4), the second lead-out terminal P2Output current i1For：
According to formula (2), formula (5) and formula (6), relative displacement x and the measurement of sensor moving component relative sensors housing
The ratio of the displacement X of vibration signal is：
Then now damped coefficient C is：
The critical damping coefficient C of sensorcFor：
Damping ratio ξ is：
Formula (8) and formula (9) are substituted into formula (10), obtaining damping ratio ξ of the invention is：
From formula (11), the damping ratio of sensor B is relevant with circuit parameter, by change damping adjustment circuit second
Resistance R2, 3rd resistor R3, or the multiplication factor K of amplifier can easily adjust the damping ratio of sensor, and can obtain
Obtain larger damping ratio.
Compared to prior art, the present invention damps adjustment circuit and voltage processing circuitry by designing, by changing two
Circuit parameter in circuit, just can easily change the damping ratio of sensor；Further, the present invention need not change sensor
Internal mechanical mechanism, just can obtain larger damping ratio, and be not in resonance ratio point, it is ensured that sensor detection
Accuracy.
Embodiment described above only expresses several embodiments of the invention, and its description is more specific and detailed, but simultaneously
Can not therefore be construed as limiting the scope of the patent.It should be pointed out that coming for one of ordinary skill in the art
Say, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention
Scope.
Claims (7)
1. a kind of sensor damping ratio adjusting apparatus, it is characterised in that：Including sensor, damping adjustment circuit and voltage treatment electricity
Road；The output end of the sensor is connected with the input of the damping adjustment circuit；The output end of the damping adjustment circuit
Input with the voltage processing circuitry is connected；The output end of the voltage processing circuitry connects with the output end of the sensor
Connect, the pressure difference signal of the damping adjustment circuit is fed back into the sensor, then damping ratio signal is exported by the sensor.
2. a kind of sensor damping ratio adjusting apparatus, it is characterised in that：The damping adjustment circuit includes first resistor, the second electricity
Resistance, 3rd resistor, first lead-out terminal and the second lead-out terminal；
First output end of the sensor is connected with the first connection end of the first resistor；Second company of the first resistor
Connect first connection end at end and the second resistance, the second connection end ground connection of the second resistance；The first of the sensor
Output end is also connected by the first lead-out terminal and the second lead-out terminal with extraneous vibration signal processing circuit；Described 3rd
First connection end of resistance is connected with second lead-out terminal, the second connection end ground connection of the 3rd resistor；The sensing
Second output head grounding of device；Second lead-out terminal accesses the electricity as the first voltage output end of damping adjustment circuit
Pressure process circuit；Then accessed as the second voltage output end of damping adjustment circuit described in second connection end of the first resistor
Voltage processing circuitry.
3. sensor damping ratio adjusting apparatus according to claim 2, it is characterised in that：The voltage processing circuitry includes
First voltage follower, second voltage follower, subtracter and amplifier；
The input of the first voltage follower is connected with the second connection end of the first resistor；The second voltage is followed
The input of device is connected with second lead-out terminal；The output end of the first voltage follower and second voltage follower point
It is not connected with two inputs of the subtracter, by the pressure difference of the subtracter output damping adjustment circuit.It is described to subtract
The output end of musical instruments used in a Buddhist or Taoist mass is connected with the input of the amplifier；The output end of the amplifier is exported with the first of the sensor
End connection, and then the pressure difference signal of adjustment circuit is fed back into the sensor.
4. sensor damping ratio adjusting apparatus according to claim 3, it is characterised in that：The first resistor, the second electricity
Resistance and 3rd resistor are variable resistor.
5. sensor damping ratio adjusting apparatus according to claim 4, it is characterised in that：The second resistance and the 3rd electricity
The resistance of resistance is the 1/10-1/5 of the D.C. resistance of the sensor.
6. sensor damping ratio adjusting apparatus according to claim 3, it is characterised in that：The damping ratio of the sensor with
The increase of the multiplication factor of the amplifier and increase.
7. sensor damping ratio adjusting apparatus according to claim 3, it is characterised in that：The damping ratio of the sensor with
The multiplication factor of amplifier, second resistance, 3rd resistor meet equation below：
Wherein, G is electromechanical coupling factor；K is the multiplication factor of amplifier；RsIt is the DC impedance of sensor；R=R2=R4, R2
And R3The respectively resistance of second resistance and 3rd resistor；M is sensor heavy moving parts；K is Sensor Elastic Element bullet
Property coefficient.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710150847.1A CN106706007A (en) | 2017-03-14 | 2017-03-14 | Device for adjusting damping ratio of sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710150847.1A CN106706007A (en) | 2017-03-14 | 2017-03-14 | Device for adjusting damping ratio of sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106706007A true CN106706007A (en) | 2017-05-24 |
Family
ID=58916999
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710150847.1A Pending CN106706007A (en) | 2017-03-14 | 2017-03-14 | Device for adjusting damping ratio of sensor |
Country Status (1)
| Country | Link |
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| CN (1) | CN106706007A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108645503A (en) * | 2018-05-31 | 2018-10-12 | 华中科技大学 | A kind of circuit of enhancing ground sound sensor low frequency measurement ability |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4083433A (en) * | 1976-11-16 | 1978-04-11 | Westinghouse Electric Corporation | Active vibration damper with electrodynamic sensor and drive units |
| US4538203A (en) * | 1983-04-11 | 1985-08-27 | Systron Donner Corp. | Passive mass-spring type of sensing device having electronic damping |
| CN2835963Y (en) * | 2005-10-31 | 2006-11-08 | 中国地震局工程力学研究所 | Closed loop pole compensation type speed vibration pickup |
| CN102252746A (en) * | 2011-04-19 | 2011-11-23 | 中国地震局工程力学研究所 | Big-damping-ratio-based double parameter speed and acceleration output vibration pickup |
| CN104819729A (en) * | 2015-04-20 | 2015-08-05 | 陕西航天导航设备有限公司 | Liquid-floated gyroscope system and damping ratio compensating test method thereof |
| CN105784237A (en) * | 2016-05-13 | 2016-07-20 | 中国科学院力学研究所 | Micro thrust test system and method |
| CN206683657U (en) * | 2017-03-14 | 2017-11-28 | 匙庆磊 | A kind of sensor damping ratio adjusting apparatus |
-
2017
- 2017-03-14 CN CN201710150847.1A patent/CN106706007A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4083433A (en) * | 1976-11-16 | 1978-04-11 | Westinghouse Electric Corporation | Active vibration damper with electrodynamic sensor and drive units |
| US4538203A (en) * | 1983-04-11 | 1985-08-27 | Systron Donner Corp. | Passive mass-spring type of sensing device having electronic damping |
| CN2835963Y (en) * | 2005-10-31 | 2006-11-08 | 中国地震局工程力学研究所 | Closed loop pole compensation type speed vibration pickup |
| CN102252746A (en) * | 2011-04-19 | 2011-11-23 | 中国地震局工程力学研究所 | Big-damping-ratio-based double parameter speed and acceleration output vibration pickup |
| CN104819729A (en) * | 2015-04-20 | 2015-08-05 | 陕西航天导航设备有限公司 | Liquid-floated gyroscope system and damping ratio compensating test method thereof |
| CN105784237A (en) * | 2016-05-13 | 2016-07-20 | 中国科学院力学研究所 | Micro thrust test system and method |
| CN206683657U (en) * | 2017-03-14 | 2017-11-28 | 匙庆磊 | A kind of sensor damping ratio adjusting apparatus |
Non-Patent Citations (1)
| Title |
|---|
| 程丽娜，等: "一种有源超低频速度传感器样机的设计", 《传感技术学报》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108645503A (en) * | 2018-05-31 | 2018-10-12 | 华中科技大学 | A kind of circuit of enhancing ground sound sensor low frequency measurement ability |
| CN108645503B (en) * | 2018-05-31 | 2019-11-12 | 华中科技大学 | A circuit for enhancing the low-frequency measurement capability of geophone sensors |
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Effective date of abandoning: 20231208 |