CN110275201A - Micro high sensitivity magnetoelectricity speed machine - Google Patents
Micro high sensitivity magnetoelectricity speed machine Download PDFInfo
- Publication number
- CN110275201A CN110275201A CN201910723435.1A CN201910723435A CN110275201A CN 110275201 A CN110275201 A CN 110275201A CN 201910723435 A CN201910723435 A CN 201910723435A CN 110275201 A CN110275201 A CN 110275201A
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- resistance
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- operational amplifier
- bandpass filter
- capacitor
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- 230000035945 sensitivity Effects 0.000 title claims abstract description 22
- 230000003321 amplification Effects 0.000 claims abstract description 29
- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 29
- 239000003990 capacitor Substances 0.000 claims description 16
- 230000005611 electricity Effects 0.000 claims 1
- 238000012544 monitoring process Methods 0.000 abstract description 5
- 239000002131 composite material Substances 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 12
- 238000012360 testing method Methods 0.000 description 6
- 238000001914 filtration Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 2
- 238000011000 absolute method Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002452 interceptive effect Effects 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
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Classifications
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- 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
- G01H11/02—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties by magnetic means, e.g. reluctance
-
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
- G01V1/16—Receiving elements for seismic signals; Arrangements or adaptations of receiving elements
- G01V1/18—Receiving elements, e.g. seismometer, geophone or torque detectors, for localised single point measurements
- G01V1/181—Geophones
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Remote Sensing (AREA)
- Life Sciences & Earth Sciences (AREA)
- Acoustics & Sound (AREA)
- Environmental & Geological Engineering (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geophysics (AREA)
- Geophysics And Detection Of Objects (AREA)
Abstract
The present invention provides a kind of micro high sensitivity magnetoelectricity speed machine, and which solve existing wave detectors to improve the technical issues of sensitivity will increase wave detector volume.Equipped with wave detector, miniature active circuit module is connected between two leading-out terminals of wave detector, miniature active circuit module includes in-phase amplification circuit, bandpass filter；The output end of in-phase amplification circuit and the input terminal of bandpass filter connect, and bandpass filter includes second order active low-pass filter circuit, high-pass filter.It the composite can be widely applied to seismic monitoring, vibration monitoring field.
Description
Technical field
The present invention relates to the magnetoelectricity speed machines that a kind of seismic monitoring, vibration monitoring field use, more particularly to a kind of micro-
Type high sensitivity magnetoelectricity speed machine.
Background technique
General moving-coil geophone is the conventional sensors for seismic prospecting and engineering survey, it turns ground vibration
It is changed to the electric signal directly proportional to vibration velocity, is the device for converting mechanical energy to electric energy.Existing moving-coil geophone connects
The technological deficiency that the small signal ability of microseism is poor, raising sensitivity just has to increase volume is received, for receiving small letter
It is number unfavorable, it is not able to satisfy current seismic monitoring and the needs for the signal that predicts an earthquake in advance are not achieved, constrains data acquisition quality
Further promotion.So improving sensitivity the adopting for tiny signal of wave detector in the case where wave detector constancy of volume
Collection and it is easy for construction be vital.
Summary of the invention
The present invention improves the technical issues of sensitivity will increase wave detector volume to solve existing wave detector, provides one
The micro high sensitivity magnetoelectric speed sensor of kind constancy of volume high sensitivity.
For this purpose, the technical scheme is that, it is equipped with wave detector, being connected between two leading-out terminals of wave detector miniature has
Source circuit module, miniature active circuit module include in-phase amplification circuit, bandpass filter；The output end of in-phase amplification circuit with
The input terminal of bandpass filter connects, and bandpass filter includes second order active low-pass filter circuit, high-pass filter.
Preferably, in-phase amplification circuit includes the first operational amplifier U1, the normal phase input end of the first operational amplifier U1
It is connect with the positive leading-out terminal of wave detector, inverting input terminal is grounded after connecting with resistance R1, and output end is by resistance R2 and bears
Input terminal connection.
Preferably, second order active low-pass filter circuit includes second operational amplifier U2, and second operational amplifier U2's is same
Phase input terminal is connect with one end of resistance R5, and the other end of resistance R5 is connect with one end of resistance R4, the other end of resistance R4 with
The output end of in-phase amplification circuit connects；The inverting input terminal of second operational amplifier U2 is connect with one end of capacitor C1, capacitor
The other end of C1 is connect with the node of resistance R4, R5；The one end of the non-inverting input terminal of second operational amplifier U2 also with capacitor C2
Connection, the other end of capacitor C2 are connect with power supply VSS.
Preferably, high-pass filter includes capacitor C3, C4 and resistance R6, with resistance R6's after capacitance C3, C4 are in parallel
The node of one end connection, the other end ground connection of resistance R6, capacitance C3 and resistance R6 are connect with output end J1-1, output end
J1-1 is connect with cathode leading-out terminal.
Preferably, operational amplifier U1, U2 is low offset voltage operational amplifier.
Present invention has the advantages that using the miniature magnetoelectric speed sensor of electric-mechanic control system, in the case where constancy of volume,
Sensitivity is 3800V/ms-1, improves 38 times, can reliably receive tiny signal.
Detailed description of the invention
Fig. 1 is circuit diagram of the invention；
Fig. 2 is input and output sensitivity contrast table of the invention；
Fig. 3 is the present invention in 2Hz output waveform and waveform amplification comparison diagram；
Fig. 4 is the present invention in 3Hz output waveform and waveform amplification comparison diagram；
Fig. 5 is the present invention in 4Hz output waveform and waveform amplification comparison diagram；
Fig. 6 is the present invention in 5Hz output waveform and waveform amplification comparison diagram；
Fig. 7 is the present invention in 10Hz output waveform and waveform amplification comparison diagram；
Fig. 8 is the present invention in 20Hz output waveform and waveform amplification comparison diagram；
Fig. 9 is the present invention in 60Hz output waveform and waveform amplification comparison diagram；
Figure 10 is the present invention in 160Hz output waveform and waveform amplification comparison diagram；
Figure 11 is the present invention in 200Hz output waveform and waveform amplification comparison diagram.
Specific embodiment
With reference to the accompanying drawings and examples to can the present invention be described further so that the skill of the technical field of the invention
Art personnel can be easy to implement the present invention.
The present invention is by electric-mechanic control system mode, by the external active circuit of conventional wave detector, wave detector leading-out terminal simultaneously
It is associated with miniature source amplifying circuit.
Two leading-out terminals of wave detector are connected with miniature active circuit module between two leading-out terminals；Two exits
Son one is anode, the other is cathode.
As shown in Figure 1, miniature active circuit module includes in-phase amplification circuit, bandpass filter, in-phase amplification circuit
The connection of the input terminal of output end and bandpass filter.
In-phase amplification circuit includes the first operational amplifier U1, the normal phase input end and wave detector of the first operational amplifier U1
The connection of positive leading-out terminal, inverting input terminal is grounded after connect with resistance R1, and output end passes through resistance R2 and negative input end company
It connects.The circuit is negative feedback amplifier circuit, and signal is flowed into from operational amplifier U1 anode, and amplification factor is determined by the ratio of R2 and R1
Fixed, amplification factor is (1+R2/R1).
Bandpass filter includes second order active low-pass filter circuit, high-pass filter.
Second order active low-pass filter circuit includes second operational amplifier U2, the non-inverting input terminal of second operational amplifier U2
It is connect with one end of resistance R5, the other end of resistance R5 is connect with one end of resistance R4, the other end of resistance R4 and same Xiang Fang great
The output end of circuit connects；The inverting input terminal of second operational amplifier U2 is connect with one end of capacitor C1, and capacitor C1's is another
End is connect with the node of resistance R4, R5；The non-inverting input terminal of second operational amplifier U2 is also connect with one end of capacitor C2, capacitor
The other end of C2 is connect with power supply VSS.The cutoff frequency expression formula of second order active low-pass filter circuit is fc=1/ (2 π √ (R4*
R5*C1*C2))。
High-pass filter is for filtering out biasing voltage signal, including capacitor C3, C4 and resistance R6, and capacitance C3, C4 are simultaneously
It is connect after connection with one end of resistance R6, the other end ground connection of resistance R6, the node and output end J1- of capacitance C3 and resistance R6
1 connection, output end J1-1 are connect with cathode leading-out terminal.J1-2 ground connection, the external ± 12V DC power supply of J2-2/3, J2-1 ground connection.
Operational amplifier U1, U2 are low offset voltage operational amplifier.
Active amplifying circuit test report
1. test objective
Active low frequency filtering amplifying circuit is verified to the output amplification effect of wave detector.
2. test method
Power supply: using two pieces of battery (12V) series connection, intermediate connection point is as GND, just extremely+12V, and cathode is -12V；
Monitor whether the output waveform behind power-up road is sinusoidal, measures wave detector output valve and detection respectively with digital multimeter with oscillograph
Device: VAS-2Hz (22V/ms2) calculates separately its sensitivity and puts added with the output valve after the low frequency filtering amplifying circuit of source
Big multiple.
3. capital equipment and measurement range that this test uses
Using absolute method low-frequency vibration standard set-up, measurement range: 2Hz~100Hz, given speed: wave recording deformation
The velocity amplitude of critical point.
4. test data is as follows:
As shown in Fig. 2, be output sensitivity of the invention and geophone sensitivity contrast table, wherein table middle and upper part Diamond spot
For output sensitivity, table middle and lower part circular dot is geophone sensitivity, unit Sv(V/m·s-1)。
As shown in figs. 3-10, be respectively the present invention in 2Hz, 3Hz, 4Hz, 5Hz, 10Hz, 20Hz, 60Hz, 160Hz and
Output waveform and waveform amplification comparison diagram when 200Hz, wherein every pair waveform diagram middle and upper part waveform is defeated after adding filter amplification circuit
Waveform out, lower waveform are detector output waveforms.
5. conclusion (of pressure testing):
By the way that test data analysis, which can be effective to geophone output signal in 2Hz~200Hz
Amplification, about 38 times of amplification factor, and can effectively inhibit interfering noise signal.
The above is not intended to restrict the invention, only to the preferred embodiment of the present invention for the skill of this field
For art personnel, the invention may be variously modified and varied.It is all to be limited in range in claim of the invention, it is done
Any modification, equivalent substitution, improvement and etc., should all be within protection scope of the present invention.
Claims (5)
1. a kind of micro high sensitivity magnetoelectricity speed machine is equipped with wave detector, characterized in that two leading-out terminals of the wave detector
Between be connected with miniature active circuit module, the miniature active circuit module includes in-phase amplification circuit, bandpass filter；It is described
The output end of in-phase amplification circuit is connect with the input terminal of the bandpass filter, and the bandpass filter includes that second order active is low
Bandpass filter circuit, high-pass filter.
2. micro high sensitivity magnetoelectricity speed machine according to claim 1, which is characterized in that the in-phase amplification circuit packet
The positive leading-out terminal of the normal phase input end and wave detector that include the first operational amplifier U1, the first operational amplifier U1 connects, instead
Phase input terminal is grounded after connecting with resistance R1, and output end is connect by resistance R2 with negative input end.
3. micro high sensitivity magnetoelectricity speed machine according to claim 1 or 2, which is characterized in that the second order active is low
Bandpass filter circuit includes second operational amplifier U2, and the non-inverting input terminal of second operational amplifier U2 and one end of resistance R5 connect
It connects, the other end of resistance R5 is connect with one end of resistance R4, and the other end of resistance R4 and the output end of in-phase amplification circuit connect；
The inverting input terminal of second operational amplifier U2 is connect with one end of capacitor C1, the other end of capacitor C1 and the section of resistance R4, R5
Point connection；The non-inverting input terminal of second operational amplifier U2 is also connect with one end of capacitor C2, the other end and power supply of capacitor C2
VSS connection.
4. micro high sensitivity magnetoelectricity speed machine according to claim 3, which is characterized in that the high-pass filter includes
Capacitor C3, C4 and resistance R6 are connect after capacitance C3, C4 are in parallel with one end of resistance R6, the other end ground connection of resistance R6, electricity
The node for holding capacitor C3 and resistance R6 is connect with output end J1-1, and output end J1-1 is connect with cathode leading-out terminal.
5. micro high sensitivity magnetoelectricity speed machine according to claim 4, which is characterized in that the operational amplifier U1,
U2 is low offset voltage operational amplifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910723435.1A CN110275201A (en) | 2019-08-07 | 2019-08-07 | Micro high sensitivity magnetoelectricity speed machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910723435.1A CN110275201A (en) | 2019-08-07 | 2019-08-07 | Micro high sensitivity magnetoelectricity speed machine |
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| Publication Number | Publication Date |
|---|---|
| CN110275201A true CN110275201A (en) | 2019-09-24 |
Family
ID=67966033
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910723435.1A Pending CN110275201A (en) | 2019-08-07 | 2019-08-07 | Micro high sensitivity magnetoelectricity speed machine |
Country Status (1)
| Country | Link |
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| CN (1) | CN110275201A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204065423U (en) * | 2014-06-30 | 2014-12-31 | 中国石油化工集团公司 | Field discrete earthquake digital recording equipment |
| CN206865425U (en) * | 2017-07-03 | 2018-01-09 | 济南大学 | Fourth-order band-pass wave filter with gain amplifier |
| CN108562383A (en) * | 2018-02-05 | 2018-09-21 | 合肥工业大学 | Static excitation/piezoresistive detection silicon micro resonance type pressure sensor closed loop autonomous system |
| CN210005707U (en) * | 2019-08-07 | 2020-01-31 | 威海动测仪器科技有限公司 | miniature high-sensitivity magnetoelectric speed machine |
-
2019
- 2019-08-07 CN CN201910723435.1A patent/CN110275201A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204065423U (en) * | 2014-06-30 | 2014-12-31 | 中国石油化工集团公司 | Field discrete earthquake digital recording equipment |
| CN206865425U (en) * | 2017-07-03 | 2018-01-09 | 济南大学 | Fourth-order band-pass wave filter with gain amplifier |
| CN108562383A (en) * | 2018-02-05 | 2018-09-21 | 合肥工业大学 | Static excitation/piezoresistive detection silicon micro resonance type pressure sensor closed loop autonomous system |
| CN210005707U (en) * | 2019-08-07 | 2020-01-31 | 威海动测仪器科技有限公司 | miniature high-sensitivity magnetoelectric speed machine |
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