CN103344267A - Analog signal conversion module of photoelectric encoder - Google Patents
Analog signal conversion module of photoelectric encoder Download PDFInfo
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- CN103344267A CN103344267A CN2013102786457A CN201310278645A CN103344267A CN 103344267 A CN103344267 A CN 103344267A CN 2013102786457 A CN2013102786457 A CN 2013102786457A CN 201310278645 A CN201310278645 A CN 201310278645A CN 103344267 A CN103344267 A CN 103344267A
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Abstract
The invention relates to an analog signal conversion module of a photoelectric encoder. The analog signal conversion module of the photoelectric encoder comprises a power module, an encoder signal receiving module, a photoelectric isolation module, a phase demodulation module, a frequency voltage conversion module and a voltage adjusting module. The power module supplies power to the encoder signal receiving module, the output end of the photoelectric encoder is connected to the encoder signal receiving module, and the output end of the encoder signal receiving module is sequentially connected with the photoelectric isolation module, the phase demodulation module, the frequency voltage conversion module and the voltage adjusting module. Circuits are simple and reliable, components needed in a conversion device are simple and fewer in number, and failures are easily investigated when circuit detection and failure processing are conducted; professional orthogonal decoding chips are adopted for the phase demodulation module, and therefore the analog signal conversion module is high in accuracy, quick in response, high in reliability and anti-jamming capacity, accurate in phase demodulation, wide in application range, and easy and convenient to operate. With regard to different frequency of the same encoder model, a user can convert signals by selecting a dial switch. In addition, the user can adjust output voltages according to actual requirements.
Description
Technical field
The present invention relates to a kind of signal code conversion technology, particularly a kind of analog signal conversion module of photoelectric encoder.
Background technology
At present, in hyundai electronics industry, be sensing means and extensively adopting with the photoelectric encoder.Photoelectric encoder is a kind of sensor that the geometry of machinery displacement on the output shaft is converted to pulse or digital quantity by opto-electronic conversion.Usually, be divided into absolute type, increment type and hybrid three kinds according to code-disc form photoelectric encoder.Incremental encoder is directly to utilize photoelectricity transformation principle to export three prescription wave impulse A, B and Z mutually.But the pulse signal of existing photoelectric encoder output often can not directly be adopted, and causes in actual applications, and the user must carry out corresponding expansion processing of circuit to the output signal of scrambler, and its application makes troubles to the user.
Summary of the invention
The present invention be directed to present photoelectric encoder output signal can not directly use, and needs the problem of conversion, has proposed a kind of analog signal conversion module of photoelectric encoder, integrates the photoelectric coding conversion equipment of phase demodulation and output adjustable voltage.
Technical scheme of the present invention is: a kind of analog signal conversion module of photoelectric encoder, comprise power module, code device signal receiver module, photoelectric isolation module, phase demodulation module, voltage to frequency conversion module and voltage regulator module, power module is given the power supply of code device signal receiver module, photoelectric encoder output inserts the code device signal receiver module, and code device signal receiver module output terminal connects photoelectric isolation module, phase demodulation module, voltage to frequency modular converter, voltage regulator module successively.
Described code device signal receiver module receives 2RHIB type encoder output by socket, and " TP-standard "/" TP-difference " signal receiving chip, " the OL7272 line drives and is adapted to long cable " differential signal receiving chip, " with the line drive circuit of 26C31 chip " differential signal receiving chip by the code device signal receiver module receive signal by importing photoelectric isolation module with the door chip.
Described photoelectric isolation module comprises optocoupler TLP521-2 and driving circuit thereof.
Described phase demodulation module comprises quadrature decoder chip, rotating pilot lamp and simulant electronic switch chip, the two signals input quadrature decoder chip of photoelectric isolation module output, the CLK output terminal of quadrature decoder chip inserts the voltage to frequency modular converter, UP/DN output termination rotating pilot lamp and the simulant electronic switch chip of quadrature decoder chip.
Described voltage to frequency modular converter adopts voltage to frequency conversion chip LM331, the phase demodulation module output signal inputs to 6 pin of voltage to frequency conversion chip LM331 chip through the first resistance shaping, 2 pin of LM331 connect potentiometer to GND ground, 5 pin of LM331 connect the 4th resistance to the VCC power supply, connect first electric capacity to GND ground, 7 pin of LM331 connect the 3rd resistance to GND ground, second resistance is to the VCC power supply, 8 pin of LM331 connect the VCC power supply, 3 pin and 4 pin of LM331 connect GND ground, 1 pin of LM331 connects second electric capacity to GND ground, and connect 4-bit DIP switch, the 3rd electric capacity and amplifier connect four resistance to output terminal behind the 4-bit DIP switch.
Described voltage regulator module comprises three amplifiers; First amplifier constitutes see-saw circuit, and its inverting input and output terminal connect two input ends of simulant electronic switch chip respectively; Second amplifier constitutes the positive amplifying circuit, exports positive phase voltage; The 3rd amplifier constitutes see-saw circuit, the output reverse voltage.
Beneficial effect of the present invention is: the analog signal conversion module of photoelectric encoder of the present invention, and circuit is simple and reliable, and required components and parts are simple in the conversion equipment, quantity is few, investigate fault when carrying out channel check and fault handling easily; The phase demodulation module adopts professional quadrature decoder chip IC 6, the precision height, and response is fast, the reliability height, antijamming capability is strong, and phase demodulation is accurate; Applied widely, easy and simple to handle.At the different frequency of same scrambler model, the user can realize the conversion of signal by selecting toggle switch.In addition, the user also can regulate output voltage according to actual needs.
Description of drawings
Fig. 1 is total theory diagram of the analog signal conversion module of photoelectric encoder of the present invention;
Fig. 2 is the analog signal conversion modular circuit structured flowchart of photoelectric encoder of the present invention;
Fig. 3 is the analog signal conversion module medium frequency voltage transformation module circuit diagram of photoelectric encoder of the present invention.
Embodiment
Total theory diagram of the analog signal conversion module of photoelectric encoder as shown in Figure 1, the analog signal conversion module of photoelectric encoder is made up of power module 101, code device signal receiver module 102, photoelectric isolation module 103, phase demodulation module 104, voltage to frequency conversion module 105 and voltage regulator module 106 these six parts.Power module 101 gives the code device signal receiver module 102 power supplies, photoelectric encoder output inserts code device signal receiver module 102, and code device signal receiver module 102 output terminals connect photoelectric isolation module 103, phase demodulation module 104, voltage to frequency modular converter 105, voltage regulator module 106 successively.
Photoelectric encoder is incremental encoder, and common output signal has A, A-, B, B-, Z, Z-, adds power lead and ground wire, needs 8 altogether with transmission line.The scrambler model that the present invention adopts is the 2RHIB type of Denmark SCANON company, umber of pulse 1 to 9000, maximum (top) speed can reach 3000 rev/mins, and output signal has three kinds of " TP-standard "/" TP-difference ", " the OL7272 line drive and is adapted to long cable " and " with the line drive circuit of 26C31 chip ".
The analog signal conversion modular circuit structured flowchart of photoelectric encoder as shown in Figure 2, code device signal receiver module 102 comprises IC1, IC2, IC3, IC4 and socket P1, P2, P3, P4, P5.P1 is two four-core sockets that have been connected with P2.1,2,3,4 of P1 connects A, A-, B, the B-line of 2RHIB type scrambler respectively.P3, P4, P5 are three four-core sockets, are connected with " TP-standard "/" TP-difference " signal receiving chip IC1, " the OL7272 line drives and is adapted to long cable " differential signal receiving chip IC2, " with the line drive circuit of 26C31 chip " differential signal receiving chip IC3 respectively.The user can be according to the arbitrary socket butt joint with P2 and P3, P4, P5 of the real output signal kind of scrambler.The signal of IC1, IC2 and IC3 output is imported photoelectric isolation module 103(IC5 through three 3 inputs with door IC4).
Photoelectric isolation module 103(IC5) comprises optocoupler TLP521-2 and driving circuit thereof.The A of IC5 output, B signal input phase demodulation module 104 are differentiated the sense of rotation of scrambler.
As shown in Figure 3, voltage to frequency modular converter 105(IC8) adopts voltage to frequency conversion chip LM331, frequency signal f, be the CLK of IC6 output, input to 6 pin of voltage to frequency conversion chip LM331 chip through resistance R 1 shaping, 2 pin connect potentiometer VR1 to GND ground, 5 pin connecting resistance R4 to VCC power supplys, connect capacitor C 1 to GND ground, 7 pin connecting resistance R3 to GND ground, resistance R 2 to VCC power supplys, 8 pin connect the VCC power supply, 3 pin and 4 pin connect GND ground, 1 pin connects capacitor C 2 to GND ground, and meets 4-bit DIP switch SW3, capacitor C 3 and amplifier U4D to V output terminal connect four resistance R 5 behind the SW3, R6, R7 and R8.The pass of output voltage V and f is:
V=-2.09RLR4C1f/VR1
The value of R3 is:
R3=（Vcc-2V）/0.2mA
RL is any among R5, R6, R7, the R8, also can be the resistance in parallel of these several resistance.The system of selection of RL is: at first calculate incoming frequency:
Notice that incoming frequency must not surpass 100KHz.
Calculated resistance value again:
Selection is lower than and the resistance of the most approaching resistance value of calculating, and also can select the mode of a plurality of resistance parallel connections to arrange.
Resistance R L and capacitor C 2 are formed low-pass filter.Capacitor C 2 is big, and the ripple of output voltage V can be littler, and capacitor C 2 is littler, and when the input pulse frequency change, the output response can be hurry up.These factors will be taken all factors into consideration when practice.
Adopt quadrature decoder chip IC 6 to come the sense of rotation of differential coding device; Be provided with toggle switch SW3 in the voltage to frequency modular converter, be applicable to the situation when same model scrambler is exported different frequency; Conversion equipment provides two-way output, and one the tunnel is positive phase voltage output, and one the tunnel is reverse voltage output, and output voltage is all adjustable.
Claims (6)
1. the analog signal conversion module of a photoelectric encoder, it is characterized in that, comprise power module, code device signal receiver module, photoelectric isolation module, phase demodulation module, voltage to frequency conversion module and voltage regulator module, power module is given the power supply of code device signal receiver module, photoelectric encoder output inserts the code device signal receiver module, and code device signal receiver module output terminal connects photoelectric isolation module, phase demodulation module, voltage to frequency modular converter, voltage regulator module successively.
2. according to the analog signal conversion module of the described photoelectric encoder of claim 1, it is characterized in that, described code device signal receiver module receives 2RHIB type encoder output by socket, and " TP-standard "/" TP-difference " signal receiving chip, " the OL7272 line drives and is adapted to long cable " differential signal receiving chip, " with the line drive circuit of 26C31 chip " differential signal receiving chip by the code device signal receiver module receive signal by importing photoelectric isolation module with the door chip.
3. according to the analog signal conversion module of the described photoelectric encoder of claim 1, it is characterized in that described photoelectric isolation module comprises optocoupler TLP521-2 and driving circuit thereof.
4. according to the analog signal conversion module of the described photoelectric encoder of claim 1, it is characterized in that, described phase demodulation module comprises quadrature decoder chip, rotating pilot lamp and simulant electronic switch chip, the two signals input quadrature decoder chip of photoelectric isolation module output, the CLK output terminal of quadrature decoder chip inserts the voltage to frequency modular converter, UP/DN output termination rotating pilot lamp and the simulant electronic switch chip of quadrature decoder chip.
5. according to the analog signal conversion module of the described photoelectric encoder of claim 1, it is characterized in that, described voltage to frequency modular converter adopts voltage to frequency conversion chip LM331, the phase demodulation module output signal inputs to 6 pin of voltage to frequency conversion chip LM331 chip through the first resistance shaping, 2 pin of LM331 connect potentiometer to GND ground, 5 pin of LM331 connect the 4th resistance to the VCC power supply, connect first electric capacity to GND ground, 7 pin of LM331 connect the 3rd resistance to GND ground, second resistance is to the VCC power supply, 8 pin of LM331 connect the VCC power supply, 3 pin and 4 pin of LM331 connect GND ground, 1 pin of LM331 connects second electric capacity to GND ground, and connect 4-bit DIP switch, the 3rd electric capacity and amplifier connect four resistance to output terminal behind the 4-bit DIP switch.
6. according to the analog signal conversion module of the described photoelectric encoder of claim 1, it is characterized in that described voltage regulator module comprises three amplifiers; First amplifier constitutes see-saw circuit, and its inverting input and output terminal connect two input ends of simulant electronic switch chip respectively; Second amplifier constitutes the positive amplifying circuit, exports positive phase voltage; The 3rd amplifier constitutes see-saw circuit, the output reverse voltage.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105180979A (en) * | 2015-08-04 | 2015-12-23 | 宁波摩米创新工场电子科技有限公司 | High-speed differential digital photoelectrical detecting system based on linear modulation and demodulation circuit |
| CN105181597A (en) * | 2015-08-04 | 2015-12-23 | 宁波摩米创新工场电子科技有限公司 | High speed difference based digital photoelectric detection system |
| CN107218955A (en) * | 2016-03-22 | 2017-09-29 | 横河电机株式会社 | Field apparatus and detector |
| CN107257217A (en) * | 2017-08-15 | 2017-10-17 | 昆山华恒焊接股份有限公司 | A kind of direct current generator feedback driving circuit and method |
| CN107764291A (en) * | 2016-08-17 | 2018-03-06 | 西安益翔航电科技有限公司 | A kind of incremental rotary encoder signal transacting and distributor circuit |
| CN109217743A (en) * | 2018-11-23 | 2019-01-15 | 成都芯进电子有限公司 | A kind of absolute type magnetic angle encoder output voltage control system and method |
| CN109218239A (en) * | 2018-09-28 | 2019-01-15 | 天津市英贝特航天科技有限公司 | A kind of the frequency pressure decoder and its working method of frequency modulation(PFM) type orthogonal encoder |
| CN109506680A (en) * | 2018-11-23 | 2019-03-22 | 成都芯进电子有限公司 | A kind of absolute type magnetic angle encoder Digital Implementation framework |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105180979A (en) * | 2015-08-04 | 2015-12-23 | 宁波摩米创新工场电子科技有限公司 | High-speed differential digital photoelectrical detecting system based on linear modulation and demodulation circuit |
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| CN107218955A (en) * | 2016-03-22 | 2017-09-29 | 横河电机株式会社 | Field apparatus and detector |
| CN107218955B (en) * | 2016-03-22 | 2021-04-20 | 横河电机株式会社 | Field device and detector |
| CN107764291A (en) * | 2016-08-17 | 2018-03-06 | 西安益翔航电科技有限公司 | A kind of incremental rotary encoder signal transacting and distributor circuit |
| CN107257217A (en) * | 2017-08-15 | 2017-10-17 | 昆山华恒焊接股份有限公司 | A kind of direct current generator feedback driving circuit and method |
| CN109218239A (en) * | 2018-09-28 | 2019-01-15 | 天津市英贝特航天科技有限公司 | A kind of the frequency pressure decoder and its working method of frequency modulation(PFM) type orthogonal encoder |
| CN109217743A (en) * | 2018-11-23 | 2019-01-15 | 成都芯进电子有限公司 | A kind of absolute type magnetic angle encoder output voltage control system and method |
| CN109506680A (en) * | 2018-11-23 | 2019-03-22 | 成都芯进电子有限公司 | A kind of absolute type magnetic angle encoder Digital Implementation framework |
| CN109217743B (en) * | 2018-11-23 | 2020-12-22 | 成都芯进电子有限公司 | Output voltage control system and method for absolute magnetic angle encoder |
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Application publication date: 20131009 |