CN204421927U - The special anti-interference expander of a kind of photoelectric encoder - Google Patents
The special anti-interference expander of a kind of photoelectric encoder Download PDFInfo
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- CN204421927U CN204421927U CN201520023881.9U CN201520023881U CN204421927U CN 204421927 U CN204421927 U CN 204421927U CN 201520023881 U CN201520023881 U CN 201520023881U CN 204421927 U CN204421927 U CN 204421927U
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Abstract
The utility model discloses the special anti-interference expander of a kind of photoelectric encoder, comprise power protection filtering, signal filtering, Phototube Coupling, external drive, output protection and circuit thereof, power protection filtering is connection signal filtering respectively, Phototube Coupling, external drive and output protection, channel signal A is successively through signal filtering, Phototube Coupling, output is expanded for channel signal A+ and channel signal A-after external drive and output protection, channel signal B is successively through signal filtering, Phototube Coupling, output is expanded for channel signal B+ and channel signal B-after external drive and output protection.The utility model filtering interference noise of input signal and power supply; protect the reliability of port; improve the overall use level of photoelectric encoder; by former two passage signal extension to four-way signal; enhance fan-out capability; cancellation common mode interference, makes PLC control more accurate, avoids the fault that counting is inaccurate.
Description
Technical field
The utility model relates to scrambler field, specifically the special anti-interference expander of a kind of photoelectric encoder.
Background technology
Photoelectric encoder amplifies by narrow thin light path coding microelectronics device the sophisticated sensor exported, but photoelectric encoder is often arranged on the very harsh occasion of condition, is subject to various electric and electromagnetic interference (EMI), but requires to provide accurately useful data reliably.Photoelectric encoder is at industrial control system as gate, and during elevator and row hang, forceful electric power is wired to threephase motor by frequency converter with PWM mode often, and transducer power is large, and the interference of generation is strong, and low frequency amplitude is large, High-order Harmonic Generation bandwidth.
Motor reel is loaded onto photoelectric encoder to realize accurately locating by force with weak control for frequency converter or PLC close-loop feedback to read indexing signal, the electromagnetic induction of motor, eddy current, electric leakage and vibration are inevitable, motor reel communicates with both photoelectric encoders housing again, if the earth-free line of motor housing, both affected safety and also brought severe jamming.
The interior PLC configured of control box and the power supply specializing in photoelectric encoder are all often AC/DC Switching Power Supplies, and the common mode filtering ground wire had in AC/DC Switching Power Supply is often missed again, and common mode interference impact is at this moment very large.It is hard to guard against that mutual inductance between the line of parallel wire, resistance conducts pressure drop and distributed capacitance are harassed, and is difficult to filtering again, the potential difference (PD) of multipoint earthing, and the common code impedance of common return and noise ripple are difficult to ensure the calmness of cold junction.
Photoelectric encoder is accurate light current sensor, works in such a case, is inevitable by multiple interference, reduce that anti-interference is system, installation, use and the supporting preparation that must do of product.
Summary of the invention
The purpose of this utility model is to provide a kind of special anti-interference expander of photoelectric encoder strengthening fan-out capability, the interference of cancellation work mould, to solve the problem proposed in above-mentioned background technology.
For achieving the above object, the utility model provides following technical scheme:
The special anti-interference expander of a kind of photoelectric encoder, comprise power protection filtering, signal filtering, Phototube Coupling, external drive, output protection and circuit thereof, described power protection filtering is connection signal filtering respectively, Phototube Coupling, external drive and output protection, the channel signal A of photoelectric encoder is successively through connection signal filtering, Phototube Coupling, output is expanded for channel signal A+ and channel signal A-after external drive and output protection, the channel signal B of photoelectric encoder is successively through connection signal filtering, Phototube Coupling, output is expanded for channel signal B+ and channel signal B-after external drive and output protection.
As the utility model further scheme: in described circuit, positive source V+ connects diode D1 respectively, electric capacity C1, fuse P1, 2 pin of photoelectrical coupler U1, 3 pin of external drive chip U3, 2 pin of photoelectrical coupler U2 and 9 pin of external drive chip U3, the diode D1 other end connects diode D2, and the fuse P1 other end connects 15 pin of external drive chip U3 respectively, 16 pin of external drive chip U3, 2 pin of rectifier bridge QD1, 2 pin of rectifier bridge QD2, diode DP, electric capacity C2 and diode D, the diode D other end exports DC8-15V voltage signal, and the diode DP other end connects the electric capacity C2 other end respectively, the electric capacity C1 other end, the diode D2 other end, and mend electric capacity CE, resistance R3, resistance R7, 2 pin of external drive chip U3, 6 pin of external drive chip U3, 7 pin of external drive chip U3, 8 pin of external drive chip U3, resistance R4, resistance R8, electric capacity C7, 4 pin of rectifier bridge QD2, electric capacity C8, electric capacity C5, 4 pin of rectifier bridge QD1, electric capacity C6 and power cathode V-, the resistance R3 other end is contact resistance R2 respectively, 4 pin of electric capacity C3 and photoelectrical coupler U1, the resistance R2 other end connects the electric capacity C3 other end respectively, 1 pin of photoelectrical coupler U1 and resistance R1, the 3 pin contact resistance R4 other end respectively of resistance R1 other end interface channel signal A, photoelectrical coupler U1, 1 pin of external drive chip U3 and 4 pin of external drive chip U3, the resistance R7 other end is contact resistance R6 respectively, 4 pin of electric capacity C4 and photoelectrical coupler U2, the resistance R6 other end connects the electric capacity C4 other end respectively, 1 pin of photoelectrical coupler U2 and resistance R5, the 3 pin contact resistance R8 other end respectively of resistance R5 other end interface channel signal B, photoelectrical coupler U2, 5 pin of external drive chip U3 and 10 pin of external drive chip U3,11 pin of external drive chip U3 connect the electric capacity C8 other end respectively, 3 pin of rectifier bridge QD2 and fuse P5, fuse P5 other end expansion output channel signal B-, 12 pin of external drive chip U3 connect the electric capacity C7 other end respectively, 1 pin of rectifier bridge QD2 and fuse P4, fuse P4 other end expansion output channel signal B+, 13 pin of external drive chip U3 connect the electric capacity C6 other end respectively, 3 pin of rectifier bridge QD1 and fuse P3, fuse P3 other end expansion output channel signal B-, 14 pin of external drive chip U3 connect the electric capacity C5 other end respectively, 1 pin of rectifier bridge QD1 and fuse P2, fuse P2 other end expansion output channel signal A+.
Compared with prior art, the beneficial effects of the utility model are:
The utility model filtering interference noise of input signal and power supply; protect the reliability of port; improve the overall use level of photoelectric encoder; by former two passage signal extension to four-way signal; enhance fan-out capability; cancellation common mode interference, makes PLC control more accurate, avoids the fault that counting is inaccurate.
Accompanying drawing explanation
Fig. 1 is structured flowchart of the present utility model.
Fig. 2 is circuit theory diagrams of the present utility model.
In figure: the filtering of 1-power protection; 2-signal filtering; 3-Phototube Coupling; 4-external drive; 5-output protection.
Embodiment
Be described in more detail below in conjunction with the technical scheme of embodiment to this patent.
Refer to Fig. 1-2, the special anti-interference expander of a kind of photoelectric encoder, comprise power protection filtering 1, signal filtering 2, Phototube Coupling 3, external drive 4, output protection 5 and circuit thereof, described power protection filtering 1 is connection signal filtering 2 respectively, Phototube Coupling 3, external drive 4 and output protection 5, the channel signal A of photoelectric encoder is successively through connection signal filtering 2, Phototube Coupling 3, output is expanded for channel signal A+ and channel signal A-after external drive 4 and output protection 5, the channel signal B of photoelectric encoder is successively through connection signal filtering 2, Phototube Coupling 3, output is expanded for channel signal B+ and channel signal B-after external drive 4 and output protection 5.
Power protection filtering 1 forms power filter reversed polarity and overvoltage protection by diode D, diode D1, diode D2, fuse P1, diode DP, electric capacity C1 and electric capacity C2, by the power conditioner of 8-15V supply internal circuit; In signal filtering 2, channel signal A is sent to photoelectrical coupler U1 after resistance R1, resistance R2, resistance R3 and electric capacity C3 carry out signal filtering, channel signal B is sent to photoelectrical coupler U2 after resistance R4, resistance R5, resistance R6 and electric capacity C4 carry out signal filtering, and filtering is higher than the spike disturbing pulse of signal frequency; In Phototube Coupling 3, channel signal A is by photoelectrical coupler U1 and resistance R4 transmission signal, 1 pin of external drive chip U3 and 4 pin of external drive chip U3 are delivered to after carrying out insulate conduction interference, channel signal B is by photoelectrical coupler U2 and resistance R8 transmission signal, 5 pin of external drive chip U3 and 10 pin of external drive chip U3 are delivered to after carrying out insulate conduction interference, two passage input expandings are exported to four-way by external drive chip U3 by external drive 4, and eliminate common mode interference; In output protection 5, channel signal A forms current limliting, overvoltage, negative peak protection by fuse P2, fuse P3, electric capacity C5, electric capacity C6 and rectifier bridge QD1; channel signal B forms current limliting, overvoltage, negative peak protection by fuse P4, fuse P5, electric capacity C7, electric capacity C8 and rectifier bridge QD2, improves reliability.
In described circuit, positive source V+ connects diode D1 respectively, electric capacity C1, fuse P1, 2 pin of photoelectrical coupler U1, 3 pin of external drive chip U3, 2 pin of photoelectrical coupler U2 and 9 pin of external drive chip U3, the diode D1 other end connects diode D2, and the fuse P1 other end connects 15 pin of external drive chip U3 respectively, 16 pin of external drive chip U3, 2 pin of rectifier bridge QD1, 2 pin of rectifier bridge QD2, diode DP, electric capacity C2 and diode D, the diode D other end exports DC8-15V voltage signal, and the diode DP other end connects the electric capacity C2 other end respectively, the electric capacity C1 other end, the diode D2 other end, and mend electric capacity CE, resistance R3, resistance R7, 2 pin of external drive chip U3, 6 pin of external drive chip U3, 7 pin of external drive chip U3, 8 pin of external drive chip U3, resistance R4, resistance R8, electric capacity C7, 4 pin of rectifier bridge QD2, electric capacity C8, electric capacity C5, 4 pin of rectifier bridge QD1, electric capacity C6 and power cathode V-, the resistance R3 other end is contact resistance R2 respectively, 4 pin of electric capacity C3 and photoelectrical coupler U1, the resistance R2 other end connects the electric capacity C3 other end respectively, 1 pin of photoelectrical coupler U1 and resistance R1, the 3 pin contact resistance R4 other end respectively of resistance R1 other end interface channel signal A, photoelectrical coupler U1, 1 pin of external drive chip U3 and 4 pin of external drive chip U3, the resistance R7 other end is contact resistance R6 respectively, 4 pin of electric capacity C4 and photoelectrical coupler U2, the resistance R6 other end connects the electric capacity C4 other end respectively, 1 pin of photoelectrical coupler U2 and resistance R5, the 3 pin contact resistance R8 other end respectively of resistance R5 other end interface channel signal B, photoelectrical coupler U2, 5 pin of external drive chip U3 and 10 pin of external drive chip U3,11 pin of external drive chip U3 connect the electric capacity C8 other end respectively, 3 pin of rectifier bridge QD2 and fuse P5, fuse P5 other end expansion output channel signal B-, 12 pin of external drive chip U3 connect the electric capacity C7 other end respectively, 1 pin of rectifier bridge QD2 and fuse P4, fuse P4 other end expansion output channel signal B+, 13 pin of external drive chip U3 connect the electric capacity C6 other end respectively, 3 pin of rectifier bridge QD1 and fuse P3, fuse P3 other end expansion output channel signal B-, 14 pin of external drive chip U3 connect the electric capacity C5 other end respectively, 1 pin of rectifier bridge QD1 and fuse P2, fuse P2 other end expansion output channel signal A+.
The utility model filtering interference noise of input signal and power supply; protect the reliability of port; improve the overall use level of photoelectric encoder; by former two passage signal extension to four-way signal; enhance fan-out capability; cancellation common mode interference, makes PLC control more accurate, avoids the fault that counting is inaccurate.
Above the better embodiment of this patent is explained in detail, but this patent is not limited to above-mentioned embodiment, in the ken that one skilled in the relevant art possesses, various change can also be made under the prerequisite not departing from this patent aim.
Claims (2)
1. the special anti-interference expander of photoelectric encoder, comprise power protection filtering (1), signal filtering (2), Phototube Coupling (3), external drive (4), output protection (5) and circuit thereof, it is characterized in that, described power protection filtering (1) be connection signal filtering (2) respectively, Phototube Coupling (3), external drive (4) and output protection (5), the channel signal A of photoelectric encoder is successively through connection signal filtering (2), Phototube Coupling (3), external drive (4) and output protection (5) are expanded afterwards and are exported as channel signal A+ and channel signal A-, the channel signal B of photoelectric encoder is successively through connection signal filtering (2), Phototube Coupling (3), external drive (4) and output protection (5) are expanded afterwards and are exported as channel signal B+ and channel signal B-.
2. the special anti-interference expander of photoelectric encoder according to claim 1, it is characterized in that, in described circuit, positive source V+ connects diode D1 respectively, electric capacity C1, fuse P1, 2 pin of photoelectrical coupler U1, 3 pin of external drive chip U3, 2 pin of photoelectrical coupler U2 and 9 pin of external drive chip U3, the diode D1 other end connects diode D2, and the fuse P1 other end connects 15 pin of external drive chip U3 respectively, 16 pin of external drive chip U3, 2 pin of rectifier bridge QD1, 2 pin of rectifier bridge QD2, diode DP, electric capacity C2 and diode D, the diode D other end exports DC8-15V voltage signal, and the diode DP other end connects the electric capacity C2 other end respectively, the electric capacity C1 other end, the diode D2 other end, and mend electric capacity CE, resistance R3, resistance R7, 2 pin of external drive chip U3, 6 pin of external drive chip U3, 7 pin of external drive chip U3, 8 pin of external drive chip U3, resistance R4, resistance R8, electric capacity C7, 4 pin of rectifier bridge QD2, electric capacity C8, electric capacity C5, 4 pin of rectifier bridge QD1, electric capacity C6 and power cathode V-, the resistance R3 other end is contact resistance R2 respectively, 4 pin of electric capacity C3 and photoelectrical coupler U1, the resistance R2 other end connects the electric capacity C3 other end respectively, 1 pin of photoelectrical coupler U1 and resistance R1, the 3 pin contact resistance R4 other end respectively of resistance R1 other end interface channel signal A, photoelectrical coupler U1, 1 pin of external drive chip U3 and 4 pin of external drive chip U3, the resistance R7 other end is contact resistance R6 respectively, 4 pin of electric capacity C4 and photoelectrical coupler U2, the resistance R6 other end connects the electric capacity C4 other end respectively, 1 pin of photoelectrical coupler U2 and resistance R5, the 3 pin contact resistance R8 other end respectively of resistance R5 other end interface channel signal B, photoelectrical coupler U2, 5 pin of external drive chip U3 and 10 pin of external drive chip U3,11 pin of external drive chip U3 connect the electric capacity C8 other end respectively, 3 pin of rectifier bridge QD2 and fuse P5, fuse P5 other end expansion output channel signal B-, 12 pin of external drive chip U3 connect the electric capacity C7 other end respectively, 1 pin of rectifier bridge QD2 and fuse P4, fuse P4 other end expansion output channel signal B+, 13 pin of external drive chip U3 connect the electric capacity C6 other end respectively, 3 pin of rectifier bridge QD1 and fuse P3, fuse P3 other end expansion output channel signal B-, 14 pin of external drive chip U3 connect the electric capacity C5 other end respectively, 1 pin of rectifier bridge QD1 and fuse P2, fuse P2 other end expansion output channel signal A.
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| CN201520023881.9U CN204421927U (en) | 2015-01-14 | 2015-01-14 | The special anti-interference expander of a kind of photoelectric encoder |
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| CN201520023881.9U CN204421927U (en) | 2015-01-14 | 2015-01-14 | The special anti-interference expander of a kind of photoelectric encoder |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110026654A (en) * | 2019-04-26 | 2019-07-19 | 吴忠市黄河电焊机有限公司 | A kind of anti-interference good digital source of welding current of wide scope input |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110026654A (en) * | 2019-04-26 | 2019-07-19 | 吴忠市黄河电焊机有限公司 | A kind of anti-interference good digital source of welding current of wide scope input |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
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Address after: Room 13603, 2072 Songjin Road, Zhangyan Town, Jinshan District, Shanghai Patentee after: Tofe sensing technology (Shanghai) Co., Ltd Address before: Jinshan District Zhangyan town 201514 Shanghai City Matsugane Road No. 2072 room 13603 Patentee before: SHANGHAI TOFI ELECTRICAL TECHNOLOGY Co.,Ltd. |
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| CP03 | Change of name, title or address |