CN206990102U - A kind of strong vibration sensor circuit and signal acquiring system for primary cut-out - Google Patents
A kind of strong vibration sensor circuit and signal acquiring system for primary cut-out Download PDFInfo
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- CN206990102U CN206990102U CN201720939356.0U CN201720939356U CN206990102U CN 206990102 U CN206990102 U CN 206990102U CN 201720939356 U CN201720939356 U CN 201720939356U CN 206990102 U CN206990102 U CN 206990102U
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Abstract
The utility model discloses a kind of strong vibration sensor circuit and signal acquiring system for primary cut-out, circuit includes charge voltage converter unit, second-order low-pass filter unit and multi gear amplifying unit, the huge quantity of electric charge caused by the strong vibration signal of voltage levels sensor test primary cut-out can be received,, still can be with steady operation in the case that electromagnetic environment is badly lower.Charge voltage converter unit is using self discharge, the integrating circuit with blocking function, multi gear amplifying unit is using fixed resistance splicing gearshift, resistance value dispersiveness is small, stepping is accurate, and Design Orientation device, the dispersiveness of offset sensor, solve under high acceleration charge sensitivity is low, under voltage levels the defects of electromagnetic environment difference.The utility model circuit theory is simple, and component cost is cheap, ingenious in design, suitable for the severe occasion of collection strong vibration, electromagnetic environment, is advantageous to promote.
Description
Technical field
The utility model belongs to primary cut-out vibration measurement technical field, more particularly to a kind of for high pressure open circuit
The strong vibration sensor circuit and strong vibration signal acquiring system of device.
Background technology
Primary cut-out is important, typical electrical equipment in power system, and its operational reliability is most important, in electric power
During system jam, if circuit, disengagement failure can not be cut-off in time, it is possible to create major accident, therefore often design error failure is examined
Disconnected system.Validity, the authenticity of data acquisition for vibration signal are the key links of diagnostic system, and vibrating sensor exists
Played an important role always in primary cut-out fault detect.In the primary cut-out field of greater degree, to wide range,
The vibrating sensor of high reliability has more urgent demand, at present vibrating sensor system acceleration grade 10000g with
Interior, because the breaker under voltage levels has strong vibration signal, vibration signal is typically much deeper than 10000g or so, conventional
Vibrating sensor system testing circuit, which does not reach, receives so big strong vibration signal charge quantity, and electromagnetic environment is severe in addition, meeting
The dynamic response of sensing system is influenceed, causes stepping error big, reliability reduces.
Utility model content
Goal of the invention：It is of the present utility model to overcome the problem of strong vibration signal acquisition reliability is relatively low in the prior art
Purpose is to provide a kind of strong vibration sensor circuit and signal acquiring system for primary cut-out, further to improve equipment
Reliability and sensor range.
Technical scheme：In order to achieve the above object, technical scheme is used by the utility model：
A kind of strong vibration sensor circuit for primary cut-out, including it is connected on the electric charge of vibrating sensor output end
Voltage transformation module, second-order low-pass filter unit and multi gear amplifying unit；
The charge voltage converter unit includes the first operational amplifier, is connected with the first operational amplifier inverting input
The 3rd electric capacity, the first electric capacity being connected in parallel between the first operational amplifier inverting input and output end and 3rd resistor, string
The 6th resistance being associated between the 3rd electric capacity and vibrating sensor electric charge output end, and with the first operational amplifier homophase input
The 11st connected resistance of end, the output end of the first operational amplifier are connected with the input of second-order low-pass filter unit；
The multi gear amplifying unit includes the 3rd operational amplifier, is connected on the 3rd operational amplifier inverting input and two
The 7th resistance and the 5th resistance between rank low pass filter unit output end, are connected in parallel on the 3rd operational amplifier inverting input
Multiple gear resistance between output end, driving switch, and the tenth to be connected with the 3rd operational amplifier in-phase input end
Two resistance, the output end of the 3rd operational amplifier are connected through the tenth resistance with signal output port.
Preferably, the 5th resistance uses potentiometer.
Preferably, the 3rd electric capacity is capacitance.
Preferably, first operational amplifier and the 3rd operational amplifier use model LF353 operation amplifier
Device.
Preferably, the vibrating sensor is quartz crystal acceleration transducer.
Preferably, the second-order low-pass filter unit uses second order Butterworth filter.
Preferably, the second-order low-pass filter unit include the second operational amplifier, the second electric capacity, the 4th electric capacity,
8th resistance and the 9th resistance；8th resistance and the 9th resistant series are in the first operational amplifier output terminal and the second operation amplifier
Between device in-phase input end, second electric capacity one end is connected between the 8th resistance and the 9th resistance, and the other end is connected to the second fortune
Amplifier inverting input is calculated, the second operational amplifier inverting input is connected with output end, the 4th electric capacity one end and the second fortune
Calculate amplifier in-phase input end to be connected, other end ground connection.
Preferably, second operational amplifier uses model LF353 operational amplifier.
A kind of strong vibration signal acquiring system for primary cut-out, set between vibrating sensor and collecting device
Above-mentioned strong vibration sensor circuit.
Beneficial effect：The sensor that strong vibration sensor circuit provided by the utility model can receive voltage levels is surveyed
The huge quantity of electric charge caused by the strong vibration signal of primary cut-out is tried, still can be with the case that electromagnetic environment is severe
Steady operation.Compared with prior art, have the following advantages：
1st, input series connection capacitance (the 3rd electric capacity), makes circuit have blocking function, by the direct current in vibration signal
Signal removes, and is easy to subsequent treatment, improves the antijamming capability of signal.
2nd, the first electric capacity self-shield for making circuit to there is self discharge function, possessing equipment in parallel with 3rd resistor.
3rd, post-amplifier is using fixed resistance splicing gearshift, and resistance value dispersiveness is small, and stepping is accurate.
4th, the dispersiveness of offset sensor is played in the presence of the 5th resistance, and it is low, high to solve charge sensitivity under high acceleration
Under voltage class the defects of electromagnetic environment difference.
5th, circuit theory is simple, and component cost is cheap, ingenious in design, can carry out stepping adjustment, can eliminate interference
Signal, suitable for the severe occasion of collection strong vibration, electromagnetic environment, be advantageous to promote.
Brief description of the drawings
Fig. 1 is the circuit structure schematic diagram of the utility model embodiment.
Fig. 2 is the acquisition system structural representation of the utility model embodiment.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is further described：
A kind of strong vibration sensor circuit for primary cut-out disclosed in the utility model embodiment, including electric charge electricity
Press converter unit, second-order low-pass filter unit and multi gear amplifying unit.Charge voltage converter unit connection vibrating sensor
Output end, the voltage signal of output are normalized simultaneously after second-order low-pass filter unit filters out high-frequency signal by multi gear amplifying unit
It is amplified to ± 5V outputs.
Fig. 1 is the circuit theory diagrams of a preferred embodiment of the present utility model.In Fig. 1, vibrating sensor is using quartz
Crystal acceleration transducer, such as YD-50, the YD-50 acceleration transducer amplitudes linearity is big, zero restoring ability, stability after large impact
It is good, it is the domestic special piezoelectric acceleration sensor for exploding, colliding contour velocity shock measurement.Vibrating sensor will receive
Vibration signal be converted into charge signal, the output end of vibrating sensor is connected with M5 cable input ports, and M5 cables are defeated
Exit port P1 is connected with charge voltage converter unit input.
Charge voltage converter unit includes the first operational amplifier U1, the first electric capacity C1, the 3rd electric capacity C3,3rd resistor
R3, the 6th resistance R6 and the 11st resistance R11.3rd electric capacity C3 is connected with the first operational amplifier U1 inverting inputs, and the 6th
Resistance R6 is connected between the 3rd electric capacity C3 and vibrating sensor electric charge output end, and the first electric capacity C1 and 3rd resistor R3 are connected in parallel on
Between first operational amplifier U1 inverting inputs and output end, it is same that the 11st resistance R11 mono- terminates the first operational amplifier U1
Phase input, other end ground connection.The block isolating circuit designed in charge voltage converter unit using the 3rd electric capacity C3 of input series connection,
Direct current signal in vibration signal is removed, is easy to subsequent treatment, improves the antijamming capability of signal.First in integrating circuit
Electric capacity C1 is in parallel with 3rd resistor R3's, circuit is had self discharge function, the self-shield for possessing equipment.Computing in the present embodiment
Amplifier uses model LF353 double operational, and the operational amplifier of different units can share same operational amplifier chip,
The operational amplifier of other models can be selected.
Step low-pass filter is input to by the voltage signals exported of the first operational amplifier U1 in charge voltage converter unit
Ripple device unit filters out high-frequency signal.Second-order low-pass filter unit can use step low-pass Butterworth filter, ensure
Signal amplitude basic guarantee is constant within 20KHZ, i.e., subtracts strong antijamming capability without declining to useful signal.Step low-pass Bart irrigates
This wave filter, including the second operational amplifier U2, the second electric capacity C2, the 4th electric capacity C4, the 8th resistance R8 and the 9th resistance R9；The
Eight resistance R8 and the 9th resistance R9 are connected on the first operational amplifier U1 output ends and the second operational amplifier U2 in-phase input ends
Between, second electric capacity C2 one end is connected to R9 between the 8th resistance and the resistance of R8 the 9th, and the other end is connected to the second operation amplifier
Device U2 inverting inputs, the second operational amplifier U2 inverting inputs are connected with output end, the 4th electric capacity C4 one end and the second fortune
Calculate amplifier U2 in-phase input ends to be connected, other end ground connection.Step low-pass Butterworth filter, filters out high-frequency signal, and it hinders
Slope with attenuation characteristic is -40dB/10oct, overcomes the shortcomings that low-pass first order filter stopband attenuation is too slow.
Filter out the voltage signal after high frequency and be output to multi gear amplifying unit, multi gear amplifying unit is by preceding magnitude voltage signals normalizing
Change and be amplified to ± 5V outputs, using normalization three gears amplification, including the 3rd operational amplifier U3, the 7th electricity in the present embodiment
Hinder R7, the 5th resistance R5, first resistor R1, second resistance R2, the 4th resistance R4 and the 12nd resistance R12.7th resistance R7 mono-
End be connected with the second operational amplifier U2 output ends, the other end is connected with the 5th resistance R5 one end, the 5th resistance R5 other ends and
3rd operational amplifier U3 inverting inputs are connected, the 12nd resistance R12 one end and the 3rd operational amplifier U3 in-phase input ends
It is connected, other end ground connection.First resistor R1, second resistance R2, the 4th resistance R4 resistance value are of different sizes, are connected in parallel on the 3rd fortune
Calculate between amplifier U3 inverting inputs and output end, the choosing of R1, R2, R4 resistance performance is determined by stirring driving switch K1
Select, realize the different gain amplifier of three gears, so as to realize the three of sensor different ranges.Multi gear amplifying unit is using solid
Determine resistance splicing gearshift, resistance value dispersiveness is small, and stepping is accurate.5th resistance R5 uses potentiometer, and it, which exists, plays counteracting biography
The dispersiveness of sensor, solves that charge sensitivity under high acceleration is low, electromagnetic environment is poor under voltage levels with this.Returned using resistance
One changes three gear amplifications, so as to ensure that circuit output voltage is stable, improves conventional charge amplifier and is shifted gears using electric capacity, and electric capacity
The shortcomings that dispersiveness is big, has inductance and resistance along with wiring, can influence dynamic characteristic, and stepping error is big, reliability is low, helps
In accurate gear shift position.
Voltage signal after amplification is connected by the 3rd operational amplifier U3 output end with the tenth resistance R10 one end,
The R10 other end is connected to BNC signal output ports, by BNC output ports (P2) output ± 5V signal to capture card, from
And realize the function of vibrating sensor.
Fig. 2 is the acquisition system structural representation using above-mentioned strong vibration sensor circuit.Including being fixedly mounted on open circuit
The vibrating sensor of device body, the strong vibration sensor circuit being arranged between vibrating sensor and collecting device.Vibrating sensing
Device receives the mechanical oscillation amount of breaker, is transformed into correspondingly by strong vibration sensor circuit of the present utility model
Electricity, be output to collecting device.Strong vibration sensor circuit use ± 15V power supplys are powered, and reaching collection by BNC lines sets
It is standby.Collecting device is existing collection or detecting instrument.
Under strong vibration, caused electric charge is especially big, and under breaker different faults, acceleration magnitude is different, caused
The quantity of electric charge is of different sizes, and the utility model can make circuit meet engine request with regulation stall button.
In summary, the vibration signal that the utility model can be tested under strong vibration acceleration levels, circuit theory is simple,
Component cost is cheap, ingenious in design, can carry out stepping adjustment, and the effect of block isolating circuit can eliminate interference signal, is applicable
In the severe occasion of collection strong vibration, electromagnetic environment, be advantageous to promote.
Claims (9)
- A kind of 1. strong vibration sensor circuit for primary cut-out, it is characterised in that：It is defeated including being connected on vibrating sensor Go out the charge voltage converter unit, second-order low-pass filter unit and multi gear amplifying unit at end；The charge voltage converter unit includes the first operational amplifier, to be connected with the first operational amplifier inverting input Three electric capacity, the first electric capacity being connected in parallel between the first operational amplifier inverting input and output end and 3rd resistor, are connected on The 6th resistance between 3rd electric capacity and vibrating sensor electric charge output end, and with the first operational amplifier in-phase input end phase The 11st resistance even, the output end of the first operational amplifier are connected with the input of second-order low-pass filter unit；The multi gear amplifying unit includes the 3rd operational amplifier, and it is low with second order to be connected on the 3rd operational amplifier inverting input The 7th resistance and the 5th resistance between pass filter unit output end, be connected in parallel on the 3rd operational amplifier inverting input with it is defeated The multiple gear resistance gone out between end, driving switch, and the 12nd electricity being connected with the 3rd operational amplifier in-phase input end Resistance, the output end of the 3rd operational amplifier are connected through the tenth resistance with signal output port.
- 2. the described strong vibration sensor circuit for primary cut-out according to claim 1, it is characterised in that：Described Five resistance use potentiometer.
- 3. the described strong vibration sensor circuit for primary cut-out according to claim 1, it is characterised in that：Described Three electric capacity are capacitance.
- 4. the described strong vibration sensor circuit for primary cut-out according to claim 1, it is characterised in that：Described One operational amplifier and the 3rd operational amplifier use model LF353 operational amplifier.
- 5. the described strong vibration sensor circuit for primary cut-out according to claim 1, it is characterised in that：It is described to shake Dynamic sensor is quartz crystal acceleration transducer.
- 6. the described strong vibration sensor circuit for primary cut-out according to claim 1, it is characterised in that：Described two Rank low pass filter unit uses second order Butterworth filter.
- 7. the described strong vibration sensor circuit for primary cut-out according to claim 5, it is characterised in that：Described two Rank low pass filter unit includes the second operational amplifier, the second electric capacity, the 4th electric capacity, the 8th resistance and the 9th resistance；8th Resistance and the 9th resistant series are between the first operational amplifier output terminal and the second operational amplifier in-phase input end, the second electricity Holding one end to be connected between the 8th resistance and the 9th resistance, the other end is connected to the second operational amplifier inverting input, and second Operational amplifier inverting input is connected with output end, and the 4th electric capacity one end is connected with the second operational amplifier in-phase input end, The other end is grounded.
- 8. the described strong vibration sensor circuit for primary cut-out according to claim 7, it is characterised in that：Described Two operational amplifiers use model LF353 operational amplifier.
- A kind of 9. strong vibration signal acquiring system for primary cut-out, it is characterised in that：Set in vibrating sensor and collection Strong vibration sensor circuit as described in claim any one of 1-8 is set between standby.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720939356.0U CN206990102U (en) | 2017-07-31 | 2017-07-31 | A kind of strong vibration sensor circuit and signal acquiring system for primary cut-out |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720939356.0U CN206990102U (en) | 2017-07-31 | 2017-07-31 | A kind of strong vibration sensor circuit and signal acquiring system for primary cut-out |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107192445A (en) * | 2017-07-31 | 2017-09-22 | 江苏省电力试验研究院有限公司 | A kind of strong vibration sensor circuit and signal acquiring system for primary cut-out |
| CN109034084A (en) * | 2018-08-03 | 2018-12-18 | 金陵科技学院 | A kind of high-voltage circuitbreaker vibration signal noise-reduction method based on quick kurtogram algorithm |
| CN110943607A (en) * | 2019-12-20 | 2020-03-31 | 武汉永力科技股份有限公司 | Single-cycle three-phase six-switch power factor correction PWM modulator |
-
2017
- 2017-07-31 CN CN201720939356.0U patent/CN206990102U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107192445A (en) * | 2017-07-31 | 2017-09-22 | 江苏省电力试验研究院有限公司 | A kind of strong vibration sensor circuit and signal acquiring system for primary cut-out |
| CN107192445B (en) * | 2017-07-31 | 2023-11-07 | 江苏省电力试验研究院有限公司 | Strong vibration sensor circuit for high-voltage circuit breaker and signal acquisition system |
| CN109034084A (en) * | 2018-08-03 | 2018-12-18 | 金陵科技学院 | A kind of high-voltage circuitbreaker vibration signal noise-reduction method based on quick kurtogram algorithm |
| CN110943607A (en) * | 2019-12-20 | 2020-03-31 | 武汉永力科技股份有限公司 | Single-cycle three-phase six-switch power factor correction PWM modulator |
| CN110943607B (en) * | 2019-12-20 | 2021-04-06 | 武汉永力科技股份有限公司 | Single-cycle three-phase six-switch power factor correction PWM modulator |
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Inventor after: Yang Jinggang Inventor after: Wu Hao Inventor after: Wang Jingjun Inventor after: Liu Tong Inventor after: Teng Yun Inventor after: Liu Yuan Inventor after: Li Yujie Inventor after: Song Siqi Inventor after: Chen Shaobo Inventor after: Gao Shan Inventor after: Jia Yongyong Inventor after: Zhao Ke Inventor after: Li Hongtao Inventor after: Feng Ying Inventor after: Li Dege Inventor after: Tao Jiagui Inventor before: Zhao Ke Inventor before: Ma Suliang Inventor before: Wang Yuhao Inventor before: Yang Jinggang Inventor before: Jia Yongyong Inventor before: Wu Jianwen Inventor before: Li Dege Inventor before: Feng Ying Inventor before: Wang Jingjun Inventor before: Liu Tong Inventor before: Li Yujie |