CN104180748A - Detecting circuit of displacement sensor - Google Patents
Detecting circuit of displacement sensor Download PDFInfo
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- CN104180748A CN104180748A CN201310223890.8A CN201310223890A CN104180748A CN 104180748 A CN104180748 A CN 104180748A CN 201310223890 A CN201310223890 A CN 201310223890A CN 104180748 A CN104180748 A CN 104180748A
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Abstract
The invention relates to a detecting circuit of a displacement sensor. The displacement sensor comprises an acquiring coil, an operational amplifier circuit for outputting an analog signal, an excitation signal generating circuit for generating an excitation signal applied to the two ends of the acquiring coil, a phase shifting circuit used for shifting the phase of a signal, generated by the excitation signal, of the acquiring coil, and a power module for supplying power to each circuit. The detecting circuit achieves simple debugging and higher output signal precision.
Description
Technical field
The present invention relates to electric circuit inspection technical field, particularly relate to a kind of testing circuit of displacement transducer.
Background technology
Moment sensor is applied and has been arrived very consequence in various machine industry equipment, has not had sensor that accurate location is provided, and the product that machine industry processes all cannot be used.Sensor even becomes an important attraction of machine industry manufacturer.The sensor of superior performance provides accurate location will to these products in process, has reduced some unnecessary troubles, thereby has brought great economic benefit to manufacturer, has also driven the industry development of machine industry.
Along with the development of machine industry, to sensor device, require also more and more higher.So high precision, the life-span is long, anti-oily water resistant antidusting antidetonation, and the sensor that can work in rugged environment is the needs of the times.
In current sensor, measure displacement and mainly contain light signal collection processing and two kinds of devices of electrical signal collection processing.The chi that electrical signal collection treating apparatus is comprised of magnetic steel ball and a steel pipe being equipped with through special processing adds that one forms with drive coil and the reading and the digital display meter three parts that gather coil and signal processing circuit.By digital display meter, supply the sine wave exciting signal of 12V voltage and about 3V to read head, then gather feeble signal that coil gathers by 4 logical amplifiers, through one, secondary amplifies, low pass, the high pass circuit out sine wave of a standard is processed to digital display meter, finally on charactron, shows reading, namely shift value.
The shortcoming that in the market this kind of displacement transducer exists is that debugging is complicated, and the signal accuracy of output is not high enough.Therefore wish that proposing a kind of sensor can overcome above shortcoming, makes it have debugging simple, the feature that output signal accuracy is high.
Summary of the invention
Technical matters to be solved by this invention is to provide a kind of testing circuit of displacement transducer, makes displacement transducer debugging simple, and output accuracy is high.
The technical solution adopted for the present invention to solve the technical problems is: a kind of testing circuit of displacement transducer is provided, and described displacement transducer comprises collection coil, also comprises: discharge circuit, outputting analog signal; Pumping signal produces circuit, and for generation of pumping signal, described pumping signal is carried in the two ends of described collection coil; Phase-shift circuit, carries out phase shifts for the signal that collection coil is produced by pumping signal; Power module is used to each circuit supply.
Described external pumping signal is carried in coil two ends, coil acquisition module processing of circuit tickler signal.
Described coil at least comprises the first collection coil, and second gathers coil, and the 3rd gathers coil, and the 4th gathers coil, wherein
First gathers coil is connected with the second collection coil, and the 3rd collection coil and the 4th gathers coil and is connected.
Described phase-shift circuit comprises the first operational amplifier, the second operational amplifier, and the 3rd operational amplifier, four-operational amplifier, the 5th operational amplifier, the 6th operational amplifier, the 7th operational amplifier, the 8th calculates amplifier; The input end of described the first operational amplifier is connected with the output terminal of the first collection coil, between negative input end and output terminal, by a resistance, is connected; The negative input end of described the second operational amplifier is connected with the second collection coil output, between positive input terminal and output terminal, by an electric capacity, is connected; The output terminal that the input end of described the 3rd operational amplifier and the 3rd gathers coil is connected, and between negative input end and output terminal, by a resistance, is connected; The negative input end of described four-operational amplifier and the 4th gathers coil output and is connected, and between positive input terminal and output terminal, by an electric capacity, is connected; The positive input terminal of described the 5th operational amplifier is connected by a resistance respectively with the output terminal of the first operational amplifier and the second operational amplifier, between negative input end and output terminal, by a resistance, is connected; The positive input terminal of described the 6th operational amplifier is connected by a resistance respectively with the output terminal of the 3rd operational amplifier and four-operational amplifier, and negative input end is connected by a resistance with output terminal; The positive input terminal of described the 7th operational amplifier is connected with the output terminal of the 6th operational amplifier with the 5th operational amplifier, and output terminal is connected with negative input end by a resistance, by an electric capacity, is connected with positive input terminal; The positive input terminal of described the 8th operational amplifier is connected with the output terminal of the 7th operational amplifier, and output terminal is connected with positive input terminal with negative input end by a resistance respectively.
Adopted above-mentioned technical scheme, the present invention compared with prior art, there is following advantage and good effect: the present invention can move the magnetic field changing on ball bar ruler, read head processing of circuit obtains phase shift signal, through single-chip microcomputer, process again the TTL signal of final output difference, can be widely used in various lathes, and reach enough precision, debugging is simple.
Accompanying drawing explanation
Fig. 1 functional-block diagram of the present invention;
The circuit diagram of Fig. 2 collection signal of the present invention;
Fig. 3 circuit diagram of the present invention.
Embodiment
Below in conjunction with specific embodiment, further set forth the present invention.Should be understood that these embodiment are only not used in and limit the scope of the invention for the present invention is described.In addition should be understood that, after having read content of the present invention, those skilled in the art can make various changes or modifications the present invention, these equivalent form of values fall within the application's appended claims limited range equally.
The present invention relates to a kind of testing circuit of displacement transducer, as shown in Figure 1, described displacement transducer comprises collection coil, also comprises: discharge circuit, outputting analog signal; Pumping signal produces circuit, and for generation of pumping signal, described pumping signal is carried in the two ends of described collection coil; Phase-shift circuit, carries out phase shifts for the signal that collection coil is produced by pumping signal; Power module is used to each circuit supply.
Described external pumping signal is carried in coil two ends, coil acquisition module processing of circuit tickler signal.
Described coil at least comprises the first collection coil, and second gathers coil, and the 3rd gathers coil, and the 4th gathers coil, and wherein the first collection coil is connected with the second collection coil, and the 3rd collection coil and the 4th gathers coil and is connected.
Described phase-shift circuit comprises the first operational amplifier IC2A, the second operational amplifier IC2C, the 3rd operational amplifier IC2B, four-operational amplifier IC2D, the 5th operational amplifier IC1A, the 6th operational amplifier IC1B, the 7th operational amplifier IC1C, the 8th calculates amplifier IC1D; The input end of described the first operational amplifier IC2A is connected with the output terminal of the first collection coil, between negative input end and output terminal, by a resistance R 5, is connected; The negative input end of described the second operational amplifier IC2C is connected with the second collection coil output, between positive input terminal and output terminal, by a capacitor C 30, is connected; The output terminal that the input end of described the 3rd operational amplifier IC2B and the 3rd gathers coil is connected, and between negative input end and output terminal, by a resistance R 43, is connected; The negative input end of described four-operational amplifier IC2D and the 4th gathers coil output and is connected, and between positive input terminal and output terminal, by a capacitor C 39, is connected; The positive input terminal of described the 5th operational amplifier IC1A is connected by a resistance respectively with the output terminal of the first operational amplifier IC2A and the second operational amplifier IC2C, between negative input end and output terminal, by a resistance R 12, is connected; The positive input terminal of described the 6th operational amplifier IC1B is connected by a resistance R 38 respectively with the output terminal of the 3rd operational amplifier IC2B and four-operational amplifier IC2D, and negative input end is connected by a resistance R 9 with output terminal; The positive input terminal of described the 7th operational amplifier IC1C is connected with the output terminal of the 6th operational amplifier IC1B with the 5th operational amplifier IC1A, and output terminal is connected with negative input end by a resistance R 15, by a capacitor C 6, is connected with positive input terminal; The positive input terminal of described the 8th operational amplifier IC1D is connected with the output terminal of the 7th operational amplifier, and output terminal is respectively by a resistance R 14, and R18 is connected with positive input terminal with negative input end.
Described coil acquisition module electricity router chip TLC0841 realizes.
As shown in Figure 3, workflow of the present invention is as follows: described discharge circuit comprises that it is A-C that two paths of signals is processed, B-D signal.A, C signal is exported A-C signal again after amplifying separately; B, D signal is exported B-D signal again after amplifying separately; Last A-C signal and B-D signal are through amplifier output.Last again through the final simulating signal of level Four amplification output.Specific descriptions are:
Gather one group of coil as Fig. 2 D+, D-, B+.D+, through resistance R 5, connects capacitor C 3, and to 3 pin of TL084-2, between 1 pin of TL08-2 and 2 pin, through resistance R 28, R29 amplifies D+ signal; B+ is through resistance R 1, and adjustable resistance RV1 is to 9 pin of TL084-2, then has 10 pin and 8 pin feedback to superpose through resistance R 32 and D+ amplifying signal.Wherein the middle position adjustable of RV1 is connected with VCC through resistance R 6.D-signal meets VCC, after the signal of D+ and B+ amplifies, superposed signal is through 3 pin of TL084-1,2 pin of TL084-1 are through resistance R 12, R12 mono-termination VCC, resistance R 12 meets adjustable resistance RV3, a termination R13 of adjustable resistance RV3, R13 mono-termination VCC, the other end connecting resistance R7 of RV3, feeds back to 1 pin of TL084-1.
Gather another group of coil as Fig. 2 A+, A-, C+.A+ signal through resistance R 43, connects C33 to 5 pin of TL084-2, C33 mono-termination VCC wherein, and 6 pin of TL084-2 meet R44, and R44 mono-termination VCC is connected to 7 pin of TL084-2 with R37; A-signal meets VCC, C+ signal is being connected with adjustable resistance RV2 through resistance R 41, the adjustable terminating resistor R42 of RV2 is connected with 5 pin of TL084-2, and the other end of RV2 connects 13 pin of TL084-2, and 12 pin of TL084-2 are received 14 pin of TL084-2 through capacitor C 39.
A+ signal and C+ signal arrive 5 pin of TL084-1 after TL0842 amplifies after R38 stack.The 6 pin process resistance R 11 of TL084-1 meet VCC, and 6 pin of TL084-1 are through 7 pin of resistance R 9 to TL084-1, then it is upper through resistance R 26, to be connected to adjustable resistance RV4, and RV4 is adjustable, and end connection R22 is connected with VCC.
The signal of above-mentioned generation connects through capacitor C 7, then through resistance R 21, is connected to 10 pin of TL084-1, and capacitor C 6 connects this signal to 8 pin of TL084-1.VCC is connected to 10 pin of TL084-1 through capacitor C 8.VCC is connected to 9 pin of TL084-1 through resistance R 20,9 pin of TL084-1 are by 8 pin of resistance R 15 to TL084-1.
9 pin of TL084-1 are connected to 12 pin of TL084-1,12 pin of TL084-1 are connected to 14 pin of TL084-1 through resistance R 18, VCC is connected to 12 pin of TL084-1 through resistance R 17,12 pin are connected to 13 pin of TL084-1 by capacitor C 9, VCC is connected to 13 pin through resistance R 19,13 pin are connected to 14 pin of TL084-1 through resistance R 14,14 pin are by the final feedback signal of resistance R 16 output.
4 pin of TL084-1 and TL084-2 meet POWER, and 11 pin meet GND.POWER and GND and pumping signal are all that outside digital display meter provides, and the feedback signal of exporting through R16 outputs to outside digital display meter.
Be not difficult to find, the present invention can move the magnetic field changing on ball bar ruler, and read head processing of circuit obtains phase shift signal, through single-chip microcomputer, process again the TTL signal of final output difference, can be widely used in various lathes, and reach enough precision, debugging is simple.
Claims (4)
1. a testing circuit for displacement transducer, described displacement transducer comprises collection coil, also comprises: discharge circuit, outputting analog signal; Pumping signal produces circuit, and for generation of pumping signal, described pumping signal is carried in the two ends of described collection coil; Phase-shift circuit, carries out phase shifts for the signal that collection coil is produced by pumping signal; Power module is used to each circuit supply.
2. the testing circuit of displacement transducer according to claim 1, is characterized in that, described external pumping signal is carried in coil two ends, coil acquisition module processing of circuit tickler signal.
3. the testing circuit of displacement transducer according to claim 1, it is characterized in that, described coil at least comprises the first collection coil, second gathers coil, the 3rd gathers coil, the 4th gathers coil, and wherein the first collection coil is connected with the second collection coil, and the 3rd collection coil and the 4th gathers coil and is connected.
4. the testing circuit of displacement transducer according to claim 1 and 2, it is characterized in that, described phase-shift circuit comprises the first operational amplifier, the second operational amplifier, the 3rd operational amplifier, four-operational amplifier, the 5th operational amplifier, the 6th operational amplifier, the 7th operational amplifier, the 8th calculates amplifier; The input end of described the first operational amplifier is connected with the output terminal of the first collection coil, between negative input end and output terminal, by a resistance, is connected; The negative input end of described the second operational amplifier is connected with the second collection coil output, between positive input terminal and output terminal, by an electric capacity, is connected; The output terminal that the input end of described the 3rd operational amplifier and the 3rd gathers coil is connected, and between negative input end and output terminal, by a resistance, is connected; The negative input end of described four-operational amplifier and the 4th gathers coil output and is connected, and between positive input terminal and output terminal, by an electric capacity, is connected; The positive input terminal of described the 5th operational amplifier is connected by a resistance respectively with the output terminal of the first operational amplifier and the second operational amplifier, between negative input end and output terminal, by a resistance, is connected; The positive input terminal of described the 6th operational amplifier is connected by a resistance respectively with the output terminal of the 3rd operational amplifier and four-operational amplifier, and negative input end is connected by a resistance with output terminal; The positive input terminal of described the 7th operational amplifier is connected with the output terminal of the 6th operational amplifier with the 5th operational amplifier, and output terminal is connected with negative input end by a resistance, by an electric capacity, is connected with positive input terminal; The positive input terminal of described the 8th operational amplifier is connected with the output terminal of the 7th operational amplifier, and output terminal is connected with positive input terminal with negative input end by a resistance respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310223890.8A CN104180748A (en) | 2013-05-28 | 2013-05-28 | Detecting circuit of displacement sensor |
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| CN201310223890.8A CN104180748A (en) | 2013-05-28 | 2013-05-28 | Detecting circuit of displacement sensor |
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| CN201310223890.8A Pending CN104180748A (en) | 2013-05-28 | 2013-05-28 | Detecting circuit of displacement sensor |
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Cited By (9)
| 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 |
| CN106124365A (en) * | 2016-08-26 | 2016-11-16 | 李玉峰 | Intelligent blood stagnates condition checkout gear and method |
| CN106153503A (en) * | 2016-08-26 | 2016-11-23 | 李玉峰 | A kind of blood profile system for accurate medical treatment detection and method |
| CN106153504A (en) * | 2016-08-26 | 2016-11-23 | 李玉峰 | Blood testing equipment and method |
| CN106198318A (en) * | 2016-08-26 | 2016-12-07 | 李玉峰 | A kind of Intelligent blood test system and method |
| CN106198317A (en) * | 2016-08-26 | 2016-12-07 | 李玉峰 | Blood stagnation condition checkout gear and method for precisely medical treatment detection |
| CN106353221A (en) * | 2016-08-26 | 2017-01-25 | 李玉峰 | Blood stagnation state detection equipment and blood stagnation state detection method |
| 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 |
| CN112229315A (en) * | 2020-09-22 | 2021-01-15 | 南京磁之汇电机有限公司 | Displacement sensor, method for acquiring displacement signal and computer readable storage medium |
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| JPS5629113A (en) * | 1979-08-20 | 1981-03-23 | Matsushita Electric Ind Co Ltd | Displacement transducer |
| JPH04320914A (en) * | 1991-04-19 | 1992-11-11 | Mitsutoyo Corp | Capacitance-type measuring device for displacement |
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| CN202903125U (en) * | 2012-11-06 | 2013-04-24 | 上海球栅测量系统有限公司 | Detection circuit for displacement sensor |
| CN202903119U (en) * | 2012-09-03 | 2013-04-24 | 上海球栅测量系统有限公司 | Detection circuit for displacement sensor |
| CN203323692U (en) * | 2013-05-28 | 2013-12-04 | 上海雷尼威尔技术有限公司 | Detection circuit of displacement sensor |
| 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 |
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2013
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Patent Citations (7)
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| JPS5629113A (en) * | 1979-08-20 | 1981-03-23 | Matsushita Electric Ind Co Ltd | Displacement transducer |
| JPH04320914A (en) * | 1991-04-19 | 1992-11-11 | Mitsutoyo Corp | Capacitance-type measuring device for displacement |
| CN101788258A (en) * | 2010-03-04 | 2010-07-28 | 上海雷尼威尔测量技术有限公司 | Signal detecting circuit for magnetostrictive displacement sensor |
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| 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 |
Cited By (9)
| 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 |
| CN106124365A (en) * | 2016-08-26 | 2016-11-16 | 李玉峰 | Intelligent blood stagnates condition checkout gear and method |
| CN106153503A (en) * | 2016-08-26 | 2016-11-23 | 李玉峰 | A kind of blood profile system for accurate medical treatment detection and method |
| CN106153504A (en) * | 2016-08-26 | 2016-11-23 | 李玉峰 | Blood testing equipment and method |
| CN106198318A (en) * | 2016-08-26 | 2016-12-07 | 李玉峰 | A kind of Intelligent blood test system and method |
| CN106198317A (en) * | 2016-08-26 | 2016-12-07 | 李玉峰 | Blood stagnation condition checkout gear and method for precisely medical treatment detection |
| CN106353221A (en) * | 2016-08-26 | 2017-01-25 | 李玉峰 | Blood stagnation state detection equipment and blood stagnation state detection method |
| CN112229315A (en) * | 2020-09-22 | 2021-01-15 | 南京磁之汇电机有限公司 | Displacement sensor, method for acquiring displacement signal and computer readable storage medium |
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Application publication date: 20141203 |