CN202903121U - Detection circuit of displacement sensor - Google Patents
Detection circuit of displacement sensor Download PDFInfo
- Publication number
- CN202903121U CN202903121U CN 201220446279 CN201220446279U CN202903121U CN 202903121 U CN202903121 U CN 202903121U CN 201220446279 CN201220446279 CN 201220446279 CN 201220446279 U CN201220446279 U CN 201220446279U CN 202903121 U CN202903121 U CN 202903121U
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- operational amplifier
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- circuit
- drive coil
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Abstract
The utility model relates to a detection circuit of a displacement sensor. The detection circuit of the displacement sensor comprises a first excitation coil and a second excitation coil for generating excitation signals; a signal adjusting circuit for adjusting the waveforms of the excitation signals; an amplifying filter circuit for amplifying and filtering signals output by the signal adjusting circuit; and an amplifying circuit for further amplifying the amplified and filtered signals. A reading head measuring circuit can be simplified. The manufacturing cost can be lowered. The precision of the displacement sensor can be enhanced.
Description
Technical field
The utility model relates to the electric circuit inspection technical field, particularly relates to a kind of testing circuit of displacement transducer.
Background technology
Moment sensor is used in various machine industry equipment and has been arrived very consequence, has not had sensor that accurate location is provided, and the product that machine industry processes all can't use.Sensor even become an important attraction of machine industry manufacturer.The sensor of superior performance provides accurate location will for these products in process, reduced some unnecessary troubles, thereby brought great economic benefit to manufacturer, has also driven the industry development of machine industry.
Measure displacement in the present sensor and mainly contain that light signal collection is processed and electrical signal collection is processed two kinds of devices, the chi that the electrical signal collection treating apparatus is comprised of magnetic steel ball and a steel pipe that is equipped with through special processing adds that one forms with reading and the digital display meter three parts of drive coil with collection coil and signal processing circuit.Supply the sine wave exciting signal of 12V voltage and about 3V to read head by digital display meter, then gather the feeble signal of coil collection by one 4 logical amplifier, through one, secondary amplifies, low pass, the high pass circuit out sine wave of a standard is processed to digital display meter, shows reading at charactron at last, namely shift value.
Along with the development of machine industry, require also more and more higher to sensor device.So high precision, the life-span is long, the anti-water antidusting of anti-oil antidetonation, and the low-cost sensor that can work in rugged environment is the demand in market.
But the shortcoming that displacement transducer in the market exists is the normal operation that abominable working environment very easily affects sensor circuit, and normally used read head circuit structure is complicated, element is many, and manufacture difficulty is large, and is difficult to reduce the common requirements of cost satisfying the market.
Summary of the invention
Technical problem to be solved in the utility model provides a kind of testing circuit of displacement transducer, can simplify the read head metering circuit, reduces cost of manufacture, improves the precision of displacement transducer.
The technical scheme that its technical matters that solves the utility model adopts is: a kind of testing circuit of displacement transducer is provided, comprises the first drive coil and the second drive coil, for generation of pumping signal; Signal adjustment circuit is for the waveform of adjusting pumping signal; Filtering and amplifying circuit is used for the output signal of signal adjustment circuit is carried out amplification filtering; Amplifying circuit is used for the signal after the amplification filtering is amplified.
Described signal adjustment circuit comprises the first operational amplifier and the second operational amplifier; The positive input terminal of described the first operational amplifier links to each other by electric capacity with the positive output end of the first drive coil, links to each other by the first potentiometer with the negative output terminal of the first drive coil; The output terminal of described the first operational amplifier links to each other with the negative output terminal of the first operational amplifier by the 3rd potentiometer, and the output terminal of described the first operational amplifier also links to each other with described filtering and amplifying circuit; The positive input terminal of described the second operational amplifier links to each other by electric capacity with the positive output end of the second drive coil, links to each other by the second potentiometer with the negative output terminal of the second drive coil; The output terminal of described the second operational amplifier links to each other with the negative input end of described the second operational amplifier by a resistance, and the output terminal of described the second operational amplifier also links to each other with described filtering and amplifying circuit by the 4th potentiometer.
Described filtering and amplifying circuit comprises the 3rd operational amplifier, and the positive input terminal of described the 3rd operational amplifier links to each other with the output terminal of the first operational amplifier with the second operational amplifier respectively; The output terminal of described the 3rd operational amplifier links to each other by the negative input end of resistance with the 3rd operational amplifier, links to each other by the positive input terminal of electric capacity with the 3rd operational amplifier; The output terminal of described the 3rd operational amplifier also links to each other with described amplifying circuit by two electric capacity.
Beneficial effect
Owing to adopted above-mentioned technical scheme, the utility model compared with prior art, have following advantage and good effect: the utility model utilizes the changes of magnetic field that produces in the chi moving process, by gather the coil collection after treatment out the sine wave of standard be converted into digital signal to digital display meter, rear demonstration shift value.The utility model is simple in structure, makes simple and easyly, not affected by rugged surroundings, and can reduce the displacement transducer read head testing circuit of cost of manufacture.
Description of drawings
Fig. 1 is functional-block diagram of the present utility model;
Fig. 2 is circuit diagram of the present utility model.
Embodiment
Below in conjunction with specific embodiment, further set forth the utility model.Should be understood that these embodiment only are used for explanation the utility model and are not used in the scope of the present utility model that limits.Should be understood that in addition those skilled in the art can make various changes or modifications the utility model after the content of having read the utility model instruction, these equivalent form of values fall within the application's appended claims limited range equally.
Embodiment of the present utility model relates to a kind of testing circuit of displacement transducer, as shown in Figure 1, comprises the first drive coil and the second drive coil, for generation of pumping signal; Signal adjustment circuit is for the waveform of adjusting pumping signal; Filtering and amplifying circuit is used for the output signal of signal adjustment circuit is carried out amplification filtering; Amplifying circuit is used for the signal after the amplification filtering is amplified.
As shown in Figure 2, described signal adjustment circuit comprises the first operational amplifier and the second operational amplifier; The positive input terminal of described the first operational amplifier links to each other by electric capacity with the positive output end of the first drive coil, links to each other by the first potentiometer with the negative output terminal of the first drive coil; The output terminal of described the first operational amplifier links to each other with the negative output terminal of the first operational amplifier by the 3rd potentiometer, and the output terminal of described the first operational amplifier also links to each other with described filtering and amplifying circuit; The positive input terminal of described the second operational amplifier links to each other by electric capacity with the positive output end of the second drive coil, links to each other by the second potentiometer with the negative output terminal of the second drive coil; The output terminal of described the second operational amplifier links to each other with the negative input end of described the second operational amplifier by a resistance, and the output terminal of described the second operational amplifier also links to each other with described filtering and amplifying circuit by the 4th potentiometer.
Described filtering and amplifying circuit comprises the 3rd operational amplifier, and the positive input terminal of described the 3rd operational amplifier links to each other with the output terminal of the first operational amplifier with the second operational amplifier respectively; The output terminal of described the 3rd operational amplifier links to each other by the negative input end of resistance with the 3rd operational amplifier, links to each other by the positive input terminal of electric capacity with the 3rd operational amplifier; The output terminal of described the 3rd operational amplifier also links to each other with described amplifying circuit by two electric capacity.
Described amplifying circuit comprises four-operational amplifier, and the positive input terminal of described four-operational amplifier links to each other with the output terminal of the 3rd operational amplifier, and the output terminal of described four-operational amplifier links to each other by the negative input end of resistance with described four-operational amplifier.
As shown in Figure 2, workflow of the present utility model is as follows: offer two drive coil pumping signal W by two oscillators simultaneously, B, after drive coil has pumping signal W and B, when attachable mechanical stage, can in drive coil, produce an induced field, gather the D+ end of drive coil, the D-end, the A+ end, the A-end is collected these faint signals, regulate sinusoidal wave crest through potentiometer RV1, potentiometer RV2 regulates sinusoidal wave trough, when crest and trough all after on the same surface level, give respectively 3 pin of operational amplifier IC1A and 5 pin of operational amplifier IC1B, after operational amplifier IC1A and operational amplifier IC1B amplification, after can regulator potentiometer RV3 the same the signal peak peak value furnishing of 7 pin of 1 pin of operational amplifier IC1A output and operational amplifier IC1B output, regulator potentiometer RV4 does the phase place adjustment again, makes more standard of sine wave.Then signal flows to 10 pin of operational amplifier IC1C, resistance R 15 by operational amplifier IC1C and resistance R 20 amplify and and carry out low-pass filtering by capacitor C 6 after, give capacitor C 4 and capacitor C 5 is carried out high-pass filtering, at last to the sine wave of exporting a standard after the operational amplifier IC1D amplification twice, and be transferred to digital display meter, just can show the exact value of distance that how long moved after signal is processed in digital display meter.
Be not difficult to find that the utility model utilizes the changes of magnetic field that produces in the chi moving process, by gather the coil collection after treatment out the sine wave of standard be converted into digital signal to digital display meter, rear demonstration shift value.The utility model is simple in structure, makes simple and easyly, not affected by rugged surroundings, and can reduce the displacement transducer read head testing circuit of cost of manufacture.
Claims (3)
1. the testing circuit of a displacement transducer is characterized in that, comprises the first drive coil and the second drive coil, for generation of pumping signal; Signal adjustment circuit is for the waveform of adjusting pumping signal; Filtering and amplifying circuit is used for the output signal of signal adjustment circuit is carried out amplification filtering; Amplifying circuit is used for the signal after the amplification filtering is amplified.
2. the testing circuit of displacement transducer according to claim 1 is characterized in that, described signal adjustment circuit comprises the first operational amplifier and the second operational amplifier; The positive input terminal of described the first operational amplifier links to each other by electric capacity with the positive output end of the first drive coil, links to each other by the first potentiometer with the negative output terminal of the first drive coil; The output terminal of described the first operational amplifier links to each other with the negative output terminal of the first operational amplifier by the 3rd potentiometer, and the output terminal of described the first operational amplifier also links to each other with described filtering and amplifying circuit; The positive input terminal of described the second operational amplifier links to each other by electric capacity with the positive output end of the second drive coil, links to each other by the second potentiometer with the negative output terminal of the second drive coil; The output terminal of described the second operational amplifier links to each other with the negative input end of described the second operational amplifier by a resistance, and the output terminal of described the second operational amplifier also links to each other with described filtering and amplifying circuit by the 4th potentiometer.
3. the testing circuit of displacement transducer according to claim 2, it is characterized in that, described filtering and amplifying circuit comprises the 3rd operational amplifier, and the positive input terminal of described the 3rd operational amplifier links to each other with the output terminal of the first operational amplifier with the second operational amplifier respectively; The output terminal of described the 3rd operational amplifier links to each other by the negative input end of resistance with the 3rd operational amplifier, links to each other by the positive input terminal of electric capacity with the 3rd operational amplifier; The output terminal of described the 3rd operational amplifier also links to each other with described amplifying circuit by two electric capacity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220446279 CN202903121U (en) | 2012-09-03 | 2012-09-03 | Detection circuit of displacement sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220446279 CN202903121U (en) | 2012-09-03 | 2012-09-03 | Detection circuit of displacement sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202903121U true CN202903121U (en) | 2013-04-24 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220446279 Expired - Fee Related CN202903121U (en) | 2012-09-03 | 2012-09-03 | Detection circuit of displacement sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202903121U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104180749A (en) * | 2013-05-28 | 2014-12-03 | 上海球栅测量系统有限公司 | Detecting circuit of displacement sensor |
| CN106556334A (en) * | 2015-09-29 | 2017-04-05 | 中国飞机强度研究所 | Portable electric flow pattern displacement transducer detection means |
-
2012
- 2012-09-03 CN CN 201220446279 patent/CN202903121U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104180749A (en) * | 2013-05-28 | 2014-12-03 | 上海球栅测量系统有限公司 | Detecting circuit of displacement sensor |
| CN106556334A (en) * | 2015-09-29 | 2017-04-05 | 中国飞机强度研究所 | Portable electric flow pattern displacement transducer detection means |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C53 | Correction of patent for invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Zhang Wei Inventor after: Zhang Lei Inventor before: Zhang Wei Inventor before: Zhang Lei Inventor before: Gong Xiangdong Inventor before: Yang Xiangdong |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: ZHANG WEI ZHANG LEI GONG XIANGDONG YANG XIANGDONG TO: ZHANG WEI ZHANG LEI |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130424 Termination date: 20180903 |