CN106403795A - Preposition device for current vortex displacement sensor - Google Patents
Preposition device for current vortex displacement sensor Download PDFInfo
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- CN106403795A CN106403795A CN201610861038.7A CN201610861038A CN106403795A CN 106403795 A CN106403795 A CN 106403795A CN 201610861038 A CN201610861038 A CN 201610861038A CN 106403795 A CN106403795 A CN 106403795A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/02—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness
-
- 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
- G01D3/00—Indicating or recording apparatus with provision for the special purposes referred to in the subgroups
- G01D3/02—Indicating or recording apparatus with provision for the special purposes referred to in the subgroups with provision for altering or correcting the law of variation
- G01D3/024—Indicating or recording apparatus with provision for the special purposes referred to in the subgroups with provision for altering or correcting the law of variation for range change; Arrangements for substituting one sensing member by another
Abstract
The invention discloses a preposition device for current vortex displacement sensor which comprises a signal adjusting circuit wherein the signal adjusting circuit includes a voltage follower circuit for the output of voltage zero displacement and an inverter circuit capable of outputting adjustable linear range and voltage signals with variable voltage ranges. According to the invention, through the voltage follower circuit, it is possible to adjust the current vortex displacement sensor to the output of voltage zero displacement; and through the inverter circuit, it is possible to output adjustable linear range and voltage signals with variable voltage ranges. This not only meets the requirement for digital software correction circuit adjustment but also the requirement for the low cost of simulated circuit.
Description
Technical field
The present invention relates to fore-lying device technical field, more particularly, to a kind of eddy current displacement sensor fore-lying device.
Background technology
At present, existing eddy current displacement sensor fore-lying device substantially adopts full analog circuit or combines software rectification
The design of circuit.Wherein, full analog circuit is directed to probe inductance parameters and is debugged with output range and has limitation, each
Inductance parameters can only correspond to a range output it is impossible to enough accomplish to correspond to the optimum voltage letter of each probe output linearity range
Number, need repeatedly regulation probe inductance value parameter just can find out corresponding sensor probe parameter with many experiments.Using number
Although word software correction circuit can be adjusted from software, relatively costly and debug get up also can comparatively laborious it is impossible to
Realize linearity measuring range to be adjusted in real time with output voltage.
Content of the invention
The invention provides a kind of eddy current displacement sensor fore-lying device, by the resistance in real-time adjustment fore-lying device circuit
Parameter, can effectively adjust sensor output range and output voltage size, can both meet numerical software correcting circuit and adjust,
Meet the requirement of analog circuit low cost again.
The invention provides a kind of eddy current displacement sensor fore-lying device, including：Circuit for signal conditioning；
Described circuit for signal conditioning includes：The voltage follower circuit of output voltage null drift；And export adjustable nodel line
The inverter circuit of the property range voltage signal variable with output voltage range.
Preferably, described voltage follower circuit includes：First potentiometer and the first amplifier；By adjusting described first electricity
The numerical value of position device and the size of described first amplifier output voltage, determine output voltage null drift.
Preferably, described inverter circuit includes：Second potentiometer and operational amplifier；By adjusting described second current potential
The size of the numerical value of device and described first amplifier output voltage, through described operational amplifier relatively after, output is adjustable
The linearity measuring range voltage signal variable with output voltage range.
Preferably, described circuit for signal conditioning also includes：Peripheral circuit；
Described peripheral circuit includes：First resistor, second resistance, 3rd resistor, the 4th resistance, the 5th resistance, the 6th electricity
Resistance, the 7th resistance, the 8th resistance, the 9th resistance, the tenth resistance, the 11st resistance and electric capacity；Wherein：
One end of described first resistor is connected with one end of described second potentiometer, the other end of described first resistor and institute
The other end stating the second potentiometer is connected；
One end of described second resistance is connected with the adjustable end of described second potentiometer, the other end of described second resistance with
The negative input end of described operational amplifier is connected；
One end of described 3rd resistor is connected with the negative input end of described operational amplifier, the other end of described 3rd resistor
It is connected with the outfan of described operational amplifier；
One end of described electric capacity is connected with the negative input end of described operational amplifier, the other end of described electric capacity and described fortune
The outfan calculating amplifier is connected；
One end of described 4th resistance is connected with the outfan of described operational amplifier, another termination of described 4th resistance
Ground；
One end of described 5th resistance is connected with one end of described first potentiometer, the other end of described 5th resistance and institute
The other end stating the first potentiometer is connected；
One end of described 6th resistance is connected with the adjustable end of described first potentiometer, another termination of described 6th resistance
Ground；
One end of described 7th resistance is connected with the positive input terminal of described first amplifier, the other end of described 7th resistance
It is connected with one end of described 8th resistance and the 9th resistance respectively, the other end of described 8th resistance is connected with power positive end, institute
The other end stating the 9th resistance is connected with described power supply negative terminal；
One end of described tenth resistance is connected with the outfan of described first amplifier, the other end of described tenth resistance with
The positive input terminal of described operational amplifier is connected；
One end of described 11st resistance is connected with the outfan of described operational amplifier, described 11st resistance another
Hold the outfan for described circuit for signal conditioning.
Preferably, described eddy current displacement sensor fore-lying device also includes：The signal that high-frequency excitation signal is processed
Test circuit.
Preferably, described signal test circuit includes：Crystal oscillator, denoising resistance, inductance, the second electric capacity, second put
Big device, cymoscope and wave filter；Wherein：
One end of described denoising resistance is connected with crystal oscillator, the other end of described denoising resistance respectively with described inductance
One end, one end of the second electric capacity is connected with the input of the second amplifier；
The other end ground connection of the other end of described inductance and affiliated second electric capacity；
The outfan of described second amplifier is connected with the input of described cymoscope, the outfan of described cymoscope and institute
The input stating wave filter is connected；
The input of described wave filter is connected with the signal input part of described circuit for signal conditioning.
A kind of eddy current displacement sensor fore-lying device being provided from such scheme, the present invention, including Signal Regulation electricity
Road, circuit for signal conditioning includes voltage follower circuit and inverter circuit, can adjust current vortex by voltage follower circuit
Displacement transducer output voltage null drift, can adjust eddy current displacement sensor by inverter circuit and export adjustable nodel line
Property the range and variable voltage signal of output voltage range, can both meet numerical software correcting circuit is adjusted, and meets simulation again
The low requirement of circuit cost.
Brief description
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
Have technology description in required use accompanying drawing be briefly described it should be apparent that, drawings in the following description be only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, acceptable
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is a kind of structural representation of eddy current displacement sensor fore-lying device embodiment 1 disclosed by the invention；
Fig. 2 is a kind of structural representation of eddy current displacement sensor fore-lying device embodiment 2 disclosed by the invention；
Fig. 3 is a kind of structural representation of eddy current displacement sensor fore-lying device embodiment 3 disclosed by the invention；
Fig. 4 is a kind of structural representation of eddy current displacement sensor fore-lying device embodiment 4 disclosed by the invention；
Fig. 5 is a kind of structural representation of eddy current displacement sensor fore-lying device embodiment 5 disclosed by the invention；
Fig. 6 is a kind of structural representation of eddy current displacement sensor fore-lying device embodiment 6 disclosed by the invention；
Fig. 7 is the circuit diagram of the signal test circuit in embodiment 7 disclosed by the invention；
Fig. 8 is the circuit diagram of the circuit for signal conditioning in embodiment 7 disclosed by the invention.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation description is it is clear that described embodiment is only a part of embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of not making creative work
Embodiment, broadly falls into the scope of protection of the invention.
As shown in figure 1, being a kind of structural representation of eddy current displacement sensor fore-lying device embodiment 1 disclosed by the invention
Figure, this eddy current displacement sensor fore-lying device includes：Circuit for signal conditioning 11, wherein, circuit for signal conditioning 11 includes：Output electricity
The voltage follower circuit 111 of pressure null drift, and the voltage letter that output scalable linearity measuring range is variable with output voltage range
Number inverter circuit 112.
In the above-described embodiments, eddy current displacement sensor output voltage zero point position can be adjusted by voltage follower circuit
Move, eddy current displacement sensor output scalable linearity measuring range can be adjusted by inverter circuit and output voltage range is variable
Voltage signal, can both meet numerical software correcting circuit adjust, meet the requirement of analog circuit low cost again.
As shown in Fig. 2 being a kind of structural representation of eddy current displacement sensor fore-lying device embodiment 2 disclosed by the invention
Figure, this eddy current displacement sensor fore-lying device includes：Circuit for signal conditioning, wherein, circuit for signal conditioning includes：Output voltage zero
The voltage follower circuit 21 of point displacement, and export the anti-of the scalable linearity measuring range voltage signal variable with output voltage range
Phase device circuit 22；Wherein：
Voltage follower circuit 21 includes：First potentiometer 211 and the first amplifier 212；By adjusting the first potentiometer 211
Numerical value and the first amplifier 212 output voltage size, determine output voltage null drift.
In the above-described embodiments, eddy current displacement sensor output voltage zero point position can be adjusted by voltage follower circuit
Move, specifically, the size of data and the first amplifier output voltage by adjusting the first potentiometer realizes output voltage zero
Point displacement；Eddy current displacement sensor can be adjusted by inverter circuit and export scalable linearity measuring range and output voltage range
Variable voltage signal, can both meet numerical software correcting circuit and adjust, meet the requirement of analog circuit low cost again.
As shown in figure 3, being a kind of structural representation of eddy current displacement sensor fore-lying device embodiment 3 disclosed by the invention
Figure, this eddy current displacement sensor fore-lying device includes：Circuit for signal conditioning, wherein, circuit for signal conditioning includes：Output voltage zero
The voltage follower circuit 31 of point displacement, and export the anti-of the scalable linearity measuring range voltage signal variable with output voltage range
Phase device circuit 32；Wherein：
Voltage follower circuit 31 includes：First potentiometer 311 and the first amplifier 312；By adjusting the first potentiometer 311
Numerical value and the first amplifier 312 output voltage size, determine output voltage null drift；
Inverter circuit 32 includes：Second potentiometer 321 and operational amplifier 322；By adjusting the second potentiometer 321
Numerical value and the size of the first amplifier 312 output voltage, after operational amplifier 322 compares, export adjustable linear amount
The journey voltage signal variable with output voltage range.
In the above-described embodiments, eddy current displacement sensor output voltage zero point position can be adjusted by voltage follower circuit
Move, specifically, the size of data and the first amplifier output voltage by adjusting the first potentiometer realizes output voltage zero
Point displacement；Eddy current displacement sensor can be adjusted by inverter circuit and export scalable linearity measuring range and output voltage range
Variable voltage signal, specifically, by adjusting the numerical value of the second potentiometer and the size of the first amplifier output voltage, passes through
Operational amplifier relatively after, export adjustable linearity measuring range voltage signal variable with output voltage range, can both meet
Numerical software correcting circuit is adjusted, and meets the requirement of analog circuit low cost again.
As shown in figure 4, being a kind of structural representation of eddy current displacement sensor fore-lying device embodiment 4 disclosed by the invention
Figure, this eddy current displacement sensor fore-lying device includes：Circuit for signal conditioning and the signal that high-frequency excitation signal is processed are surveyed
Examination circuit 40；Wherein, circuit for signal conditioning includes：The voltage follower circuit 41 of output voltage null drift, and output is adjustable
The inverter circuit 42 of the section linearity measuring range voltage signal variable with output voltage range；Wherein：
Voltage follower circuit 41 includes：First potentiometer 411 and the first amplifier 412；By adjusting the first potentiometer 411
Numerical value and the first amplifier 412 output voltage size, determine output voltage null drift；
Inverter circuit 42 includes：Second potentiometer 421 and operational amplifier 422；By adjusting the second potentiometer 421
Numerical value and the size of the first amplifier 412 output voltage, after operational amplifier 422 compares, export adjustable linear amount
The journey voltage signal variable with output voltage range.
In the above-described embodiments, signal processing is carried out to high frequency mechanism signal by signal test circuit, by voltage with
Eddy current displacement sensor output voltage null drift can be adjusted with circuit, specifically, by adjusting the number of the first potentiometer
To realize output voltage null drift according to the size with the first amplifier output voltage；Electric whirlpool can be adjusted by inverter circuit
Stream displacement transducer exports scalable linearity measuring range and the variable voltage signal of output voltage range, specifically, by adjusting the
The numerical value of two potentiometers and the size of the first amplifier output voltage, through operational amplifier relatively after, export adjustable line
Property the range voltage signal variable with output voltage range, can both meet numerical software correcting circuit adjust, again meet simulation
The low requirement of circuit cost.
As shown in figure 5, being a kind of structural representation of eddy current displacement sensor fore-lying device embodiment 5 disclosed by the invention
Figure, this eddy current displacement sensor fore-lying device includes：Circuit for signal conditioning and the signal that high-frequency excitation signal is processed are surveyed
Examination circuit 50；Wherein, circuit for signal conditioning includes：The voltage follower circuit 51 of output voltage null drift, and output is adjustable
The inverter circuit 52 of the section linearity measuring range voltage signal variable with output voltage range, and peripheral circuit 53；Wherein：
Voltage follower circuit 51 includes：First potentiometer 511 and the first amplifier 512；By adjusting the first potentiometer 511
Numerical value and the first amplifier 512 output voltage size, determine output voltage null drift；
Inverter circuit 52 includes：Second potentiometer 521 and operational amplifier 522；By adjusting the second potentiometer 521
Numerical value and the size of the first amplifier 512 output voltage, after operational amplifier 522 compares, export adjustable linear amount
The journey voltage signal variable with output voltage range.
In the above-described embodiments, signal processing is carried out to high frequency mechanism signal by signal test circuit, by voltage with
Eddy current displacement sensor output voltage null drift can be adjusted with circuit, specifically, by adjusting the number of the first potentiometer
To realize output voltage null drift according to the size with the first amplifier output voltage；Electric whirlpool can be adjusted by inverter circuit
Stream displacement transducer exports scalable linearity measuring range and the variable voltage signal of output voltage range, specifically, by adjusting the
The numerical value of two potentiometers and the size of the first amplifier output voltage, through operational amplifier relatively after, export adjustable line
Property the range voltage signal variable with output voltage range, can both meet numerical software correcting circuit adjust, again meet simulation
The low requirement of circuit cost.
As shown in fig. 6, being a kind of structural representation of eddy current displacement sensor fore-lying device embodiment 6 disclosed by the invention
Figure, this eddy current displacement sensor fore-lying device includes：Circuit for signal conditioning and the signal that high-frequency excitation signal is processed are surveyed
Examination circuit 60；Wherein, circuit for signal conditioning includes：The voltage follower circuit 61 of output voltage null drift, and output is adjustable
The inverter circuit 62 of the section linearity measuring range voltage signal variable with output voltage range, and peripheral circuit 63；Wherein：
Voltage follower circuit 61 includes：First potentiometer 611 and the first amplifier 612；By adjusting the first potentiometer 611
Numerical value and the first amplifier 612 output voltage size, determine output voltage null drift；
Inverter circuit 62 includes：Second potentiometer 621 and operational amplifier 622；By adjusting the second potentiometer 621
Numerical value and the size of the first amplifier 612 output voltage, after operational amplifier 622 compares, export adjustable linear amount
The journey voltage signal variable with output voltage range；
Signal test circuit 60 includes：Crystal oscillator 601, denoising resistance R, inductance L, the second electric capacity C, the second amplifier
602nd, cymoscope 603 and wave filter 604；Wherein：
One end of denoising resistance R is connected with crystal oscillator 601, the other end of denoising resistance R respectively with inductance L one
End, one end of the second electric capacity C are connected with the input of the second amplifier 602；
The other end ground connection of the other end of described inductance and affiliated second electric capacity；
The outfan of described second amplifier is connected with the input of described cymoscope, the outfan of described cymoscope and institute
The input stating wave filter is connected；
The input of described wave filter is connected with the signal input part of described circuit for signal conditioning.
In the above-described embodiments, in eddy current displacement sensor fore-lying device signal processing, when one group is shaken by crystal
The high-frequency excitation signal swinging device generation, by inductance L and the second electric capacity C after, can export that a corresponding frequency is constant, amplitude change
The alternating voltage feedback signal changed, amplitude changes with inductance L displacement different from detection faces, this feedback signal through detection,
Amplify, filter etc. and can export corresponding voltage signal after processing.For example, by electric vortex displacement sensor probe detection range design
For 0-2mm, in this range ability, LC is changed with measured object displacement with L and amplitude is corresponding changes, and through detection, puts
Greatly, after filtering, displacement transducer output voltage signal is 0-5V, realizes leading sensor device high frequency signals and adjusts with signal
Reason.
Meanwhile, signal processing is carried out to high frequency mechanism signal by signal test circuit, can by voltage follower circuit
Adjust eddy current displacement sensor output voltage null drift, specifically, put with first by the data adjusting the first potentiometer
The size of big device output voltage is realizing output voltage null drift；Current vortex displacement sensing can be adjusted by inverter circuit
Device exports scalable linearity measuring range and the variable voltage signal of output voltage range, specifically, by adjusting the second potentiometer
Numerical value and the size of the first amplifier output voltage, through operational amplifier relatively after, export adjustable linearity measuring range with defeated
Go out the variable voltage signal of voltage range, can both meet numerical software correcting circuit and adjust, meet analog circuit low cost again
Requirement.
As shown in Figure 7 and Figure 8, be a kind of eddy current displacement sensor fore-lying device embodiment 7 disclosed by the invention structure
Schematic diagram, this eddy current displacement sensor fore-lying device includes：Circuit for signal conditioning and the letter that high-frequency excitation signal is processed
Number test circuit；Wherein, circuit for signal conditioning includes：The voltage follower circuit of output voltage null drift, and output is adjustable
The inverter circuit of the section linearity measuring range voltage signal variable with output voltage range, and peripheral circuit；Wherein：
Voltage follower circuit includes：First potentiometer R52 and the first amplifier U2B；By adjusting the first potentiometer R52's
Numerical value and the size of the first amplifier U2B output voltage, determine output voltage null drift；
Inverter circuit includes：Second potentiometer R31 and operational amplifier U2C；By adjusting the number of the second potentiometer R31
Value and the size of the first amplifier U2B output voltage, through operational amplifier U2C relatively after, export adjustable linearity measuring range
The voltage signal variable with output voltage range；
Signal test circuit 70 includes：Crystal oscillator 701, denoising resistance R, inductance L, the second electric capacity C, the second amplifier
702nd, cymoscope 703 and wave filter 704；Wherein：
One end of denoising resistance R is connected with crystal oscillator 701, the other end of denoising resistance R respectively with inductance L one
End, one end of the second electric capacity C are connected with the input of the second amplifier 702；
The other end ground connection of the other end of inductance L and the second electric capacity C；
The outfan of the second amplifier 702 is connected with the input of cymoscope 703, the outfan of cymoscope 703 and filtering
The input of device 704 is connected；
The input of wave filter 704 is connected with the signal input part of circuit for signal conditioning；
Peripheral circuit includes：First resistor R32, second resistance R33,3rd resistor R34, the 4th resistance R35, the 5th resistance
R38, the 6th resistance R39, the 7th resistance R41, the 8th resistance R40, the 9th resistance R42, the tenth resistance R43, the 11st resistance R44
With electric capacity C23；Wherein：
One end of first resistor R32 is connected with one end of the second potentiometer R31, the other end of first resistor R32 and second
The other end of potentiometer R31 is connected；
One end of second resistance R33 is connected with the adjustable end of the second potentiometer R31, the other end of second resistance R33 and fortune
The negative input end calculating amplifier U2C is connected；
One end of 3rd resistor R34 is connected with the negative input end of operational amplifier U2C, the other end of 3rd resistor R34 with
The outfan of operational amplifier U2C is connected；
One end of electric capacity C23 is connected with the negative input end of operational amplifier U2C, the other end of electric capacity C23 and operation amplifier
The outfan of device U2C is connected；
One end of 4th resistance R35 is connected with the outfan of operational amplifier U2C, the other end ground connection of the 4th resistance R35；
One end of 5th resistance R38 is connected with one end of the first potentiometer R52, the other end and first of the 5th resistance R38
The other end of potentiometer R52 is connected；
One end of 6th resistance R39 is connected with the adjustable end of the first potentiometer R52, the other end ground connection of the 6th resistance R39；
One end of 7th resistance R41 is connected with the positive input terminal of the first amplifier U2B, and the other end of the 7th resistance R41 divides
It is not connected with one end of the 8th resistance R40 and the 9th resistance R42, the other end of the 8th resistance R40 is connected with power positive end, the 9th
The other end of resistance R42 is connected with power supply negative terminal；
One end of tenth resistance R43 is connected with the outfan of the first amplifier U2B, the other end of the tenth resistance R43 and fortune
The positive input terminal calculating amplifier U2C is connected；
One end of 11st resistance R44 is connected with the outfan of operational amplifier U2C, the other end of the 11st resistance R44
Outfan for circuit for signal conditioning.
In the above-described embodiments, in eddy current displacement sensor fore-lying device signal processing, when one group is shaken by crystal
The high-frequency excitation signal swinging device generation, by inductance L and the second electric capacity C after, can export that a corresponding frequency is constant, amplitude change
The alternating voltage feedback signal changed, amplitude changes with inductance L displacement different from detection faces, this feedback signal through detection,
Amplify, filter etc. and can export corresponding voltage signal after processing.For example, by electric vortex displacement sensor probe detection range design
For 0-2mm, in this range ability, LC is changed with measured object displacement with L and amplitude is corresponding changes, and through detection, puts
Greatly, after filtering, displacement transducer output voltage signal is 0-5V, realizes leading sensor device high frequency signals and adjusts with signal
Reason.
Meanwhile, signal processing is carried out to high frequency mechanism signal by signal test circuit, can by voltage follower circuit
Adjust eddy current displacement sensor output voltage null drift, specifically, put with first by the data adjusting the first potentiometer
The size of big device output voltage is realizing output voltage null drift；Current vortex displacement sensing can be adjusted by inverter circuit
Device exports scalable linearity measuring range and the variable voltage signal of output voltage range, specifically, by adjusting the second potentiometer
Numerical value and the size of the first amplifier output voltage, through operational amplifier relatively after, export adjustable linearity measuring range with defeated
Go out the variable voltage signal of voltage range, can both meet numerical software correcting circuit and adjust, meet analog circuit low cost again
Requirement.
If the function described in the present embodiment method is realized and as independent product pin using in the form of SFU software functional unit
When selling or using, can be stored in a computing device read/write memory medium.Based on such understanding, the embodiment of the present invention
Partly being embodied in the form of software product of part that prior art is contributed or this technical scheme, this is soft
Part product is stored in a storage medium, including some instructions with so that computing device (can be personal computer,
Server, mobile computing device or network equipment etc.) execution each embodiment methods described of the present invention all or part step
Suddenly.And aforesaid storage medium includes：USB flash disk, portable hard drive, read only memory (ROM, Read-Only Memory), deposit at random
Access to memory (RAM, Random Access Memory), magnetic disc or CD etc. are various can be with the medium of store program codes.
In this specification, each embodiment is described by the way of going forward one by one, and what each embodiment stressed is and other
The difference of embodiment, between each embodiment same or similar partly mutually referring to.
Described above to the disclosed embodiments, makes professional and technical personnel in the field be capable of or uses the present invention.
Multiple modifications to these embodiments will be apparent from for those skilled in the art, as defined herein
General Principle can be realized without departing from the spirit or scope of the present invention in other embodiments.Therefore, the present invention
It is not intended to be limited to the embodiments shown herein, and be to fit to and principles disclosed herein and features of novelty phase one
The scope the widest causing.
Claims (6)
1. a kind of eddy current displacement sensor fore-lying device is it is characterised in that include：Circuit for signal conditioning；
Described circuit for signal conditioning includes：The voltage follower circuit of output voltage null drift, and output scalable linearly measure
The inverter circuit of the journey voltage signal variable with output voltage range.
2. eddy current displacement sensor fore-lying device according to claim 1 is it is characterised in that described voltage follower circuit bag
Include：First potentiometer and the first amplifier；By adjusting the numerical value of described first potentiometer and described first amplifier output electricity
The size of pressure, determines output voltage null drift.
3. eddy current displacement sensor fore-lying device according to claim 2 is it is characterised in that described inverter circuit bag
Include：Second potentiometer and operational amplifier；By adjusting the numerical value of described second potentiometer and described first amplifier output electricity
The size of pressure, through described operational amplifier relatively after, export adjustable linearity measuring range electricity variable with output voltage range
Pressure signal.
4. eddy current displacement sensor fore-lying device according to claim 3 it is characterised in that described circuit for signal conditioning also
Including：Peripheral circuit；
Described peripheral circuit includes：First resistor, second resistance, 3rd resistor, the 4th resistance, the 5th resistance, the 6th resistance,
Seven resistance, the 8th resistance, the 9th resistance, the tenth resistance, the 11st resistance and electric capacity；Wherein：
One end of described first resistor is connected with one end of described second potentiometer, the other end of described first resistor and described the
The other end of two potentiometers is connected；
One end of described second resistance is connected with the adjustable end of described second potentiometer, the other end of described second resistance with described
The negative input end of operational amplifier is connected；
One end of described 3rd resistor is connected with the negative input end of described operational amplifier, the other end of described 3rd resistor and institute
The outfan stating operational amplifier is connected；
One end of described electric capacity is connected with the negative input end of described operational amplifier, and the other end of described electric capacity is put with described computing
The outfan of big device is connected；
One end of described 4th resistance is connected with the outfan of described operational amplifier, the other end ground connection of described 4th resistance；
One end of described 5th resistance is connected with one end of described first potentiometer, the other end of described 5th resistance and described the
The other end of one potentiometer is connected；
One end of described 6th resistance is connected with the adjustable end of described first potentiometer, the other end ground connection of described 6th resistance；
One end of described 7th resistance is connected with the positive input terminal of described first amplifier, and the other end of described 7th resistance is respectively
It is connected with one end of described 8th resistance and the 9th resistance, the other end of described 8th resistance is connected with power positive end, described
The other end of nine resistance is connected with described power supply negative terminal；
One end of described tenth resistance is connected with the outfan of described first amplifier, the other end of described tenth resistance with described
The positive input terminal of operational amplifier is connected；
One end of described 11st resistance is connected with the outfan of described operational amplifier, and the other end of described 11st resistance is
The outfan of described circuit for signal conditioning.
5. the eddy current displacement sensor fore-lying device according to any one in claim 1-4 is it is characterised in that also wrap
Include：The signal test circuit that high-frequency excitation signal is processed.
6. eddy current displacement sensor fore-lying device according to claim 5 is it is characterised in that described signal test circuit bag
Include：Crystal oscillator, denoising resistance, inductance, the second electric capacity, the second amplifier, cymoscope and wave filter；Wherein：
One end of described denoising resistance is connected with crystal oscillator, the other end of described denoising resistance respectively with described inductance one
End, one end of the second electric capacity are connected with the input of the second amplifier；
The other end ground connection of the other end of described inductance and affiliated second electric capacity；
The outfan of described second amplifier is connected with the input of described cymoscope, the outfan of described cymoscope and described filter
The input of ripple device is connected；
The input of described wave filter is connected with the signal input part of described circuit for signal conditioning.
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| CN201610861038.7A CN106403795B (en) | 2016-09-28 | 2016-09-28 | A kind of eddy current displacement sensor fore-lying device |
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| CN201610861038.7A CN106403795B (en) | 2016-09-28 | 2016-09-28 | A kind of eddy current displacement sensor fore-lying device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN113721517A (en) * | 2021-08-31 | 2021-11-30 | 上海兰宝传感科技股份有限公司 | Return difference setting system and method for proximity switch sensor |
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