CN203658480U - Voltage-stabilization photoelectric coupler detection circuit - Google Patents
Voltage-stabilization photoelectric coupler detection circuit Download PDFInfo
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- CN203658480U CN203658480U CN201320606857.9U CN201320606857U CN203658480U CN 203658480 U CN203658480 U CN 203658480U CN 201320606857 U CN201320606857 U CN 201320606857U CN 203658480 U CN203658480 U CN 203658480U
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Abstract
The utility model relates to a voltage-stabilization photoelectric coupler detection circuit. The voltage-stabilization photoelectric coupler detection circuit comprises a DC (direct-current) regulated power supply circuit. The 3V DC voltage output by the DC regulated power supply circuit is connected in series with one end of the key switch (S1). One path of the key switch (S1) is connected in series with a key switch (S2), and adjustable resistor and a resistor (R1), and then is connected with a binding post (A). The other path of the key switch (S1) is connected in series with a resistor (R2) and then is connected with a binding post (B). A binding post (C) is connected to the ground. A binding post (D) is connected in series with a light-emitting diode and then is connected to the ground. The DC regulated power supply circuit is composed of a step-down circuit, a rectification circuit, a filter circuit and a voltage stabilizing circuit which are sequentially connected, and outputs a stable 3V DC voltage. The voltage-stabilization photoelectric coupler detection circuit is simple in structure, convenient to use and accurate in testing.
Description
Technical field
The utility model relates to field tests, particularly a kind of voltage stabilizing photoelectrical coupler testing circuit.
Background technology
Photoelectrical coupler is as circuit isolating device, plays signal isolation, coupled transfer effect is widely used in the each field of the commercial production such as household electrical appliance, frequency converter.When if the electronic equipment of having applied photoelectrical coupler above-mentioned breaks down, tester is in failure diagnostic process, usually need to judge the quality of photoelectrical coupler, common method is to utilize two multimeter tests, a multimeter is measured photoelectrical coupler input end with R*1, another multimeter is measured photoelectric coupler output end with R*100, in the time of input end conducting, the pointer of output terminal multimeter has swing, judge that photoelectrical coupler is normal, this test mode is inaccurate, and easily erroneous judgement, affects testing efficiency.
Summary of the invention
Technical problem to be solved in the utility model is to provide a kind of a kind of voltage stabilizing photoelectrical coupler testing circuit of simple in structure and accurate judgement.
The utility model adopts following technical scheme: it comprises, DC-stabilized circuit, the 3V DC voltage of DC-stabilized circuit output is connected with keyswitch S1 one end, keyswitch S1Yi road is connected with binding post A with after keyswitch S2, adjustable resistance Rp, resistance R 1 series connection, another road of keyswitch S1 is connected with binding post B with after resistance R 2 series connection, binding post C ground connection, post D connect with LED after ground connection; Described DC-stabilized circuit is connected to form successively by reduction voltage circuit, rectification circuit, filtering circuit, mu balanced circuit, stable output 3V DC voltage; Reduction voltage circuit utilizes transformer T1 by 220V alternating voltage step-down output 6V voltage, and rectification circuit is the rectifier bridge of four diode compositions, and filtering circuit is made up of capacitor C in parallel 1 and capacitor C 2; Mu balanced circuit is by resistance R 3, diode U1, and triode Q1, resistance R 4 and resistance R 5 form; When test, the anode of single channel photoelectrical coupler to be measured, collector, negative electrode, emitter are connected with binding post A, binding post B, binding post C, post D respectively.
Further, described adjustable resistance Rp is 220 Ω adjustable resistances, and resistance R 1 is 220 Ω resistance, and resistance R 2 is 330 Ω resistance.
Positive technique effect of the present utility model: the utility model is simple in structure, easy to use.After single channel photoelectrical coupler pin to be measured and binding post A, binding post B, binding post C, post D are connected, adjust adjustable resistance Rp resistance, according to LED, brightness changes to judge that whether photoelectrical coupler is normal, measures rapidly, accurately.
Brief description of the drawings
Accompanying drawing 1 is circuit theory diagrams of the present utility model.
Accompanying drawing 2 is the circuit theory diagrams of DC-stabilized circuit in the utility model.
Embodiment
As shown in accompanying drawing 1 and Fig. 2, the utility model comprises: DC-stabilized circuit, the 3V DC voltage of DC-stabilized circuit output is connected with keyswitch S1 one end, keyswitch S1Yi road is connected with binding post A with after keyswitch S2, adjustable resistance Rp, resistance R 1 series connection, another road of keyswitch S1 is connected with binding post B with after resistance R 2 series connection, binding post C ground connection, post D connect with LED after ground connection.
DC-stabilized circuit is connected to form successively by reduction voltage circuit, rectification circuit, filtering circuit, mu balanced circuit, stable output 3V DC voltage; Reduction voltage circuit utilizes transformer T1 by 220V alternating voltage step-down output 6V voltage, rectification circuit is that four diodes are the rectifier bridge of diode D1, D2, D3, D4 composition, utilize the unilateal conduction characteristic of diode to obtain pulsating direct current through overcommutation, filtering circuit is made up of capacitor C in parallel 1 and capacitor C 2, utilize logical friendship of electric capacity to hinder directly, the character of logical high frequency resistance low frequency, by the alternating component filtering of passing through in the steady direct current of rectifier bridge, thereby obtains smoother DC voltage.Mu balanced circuit is by resistance R 3, diode U1, and triode Q1, resistance R 4 and resistance R 5 form, and realize the 3V DC voltage stability of output, do not change with the variation of ac grid voltage and load; .
When test, the anode of single channel photoelectrical coupler to be measured, collector, negative electrode, emitter are connected with binding post A, binding post B, binding post C, post D respectively.In preferred embodiment, adjustable resistance Rp is 220 Ω adjustable resistances, and resistance R 1 is 220 Ω resistance, and resistance R 2 is 330 Ω resistance.
In the time that reality is tested, the anode of single channel photoelectrical coupler to be measured, collector, negative electrode, emitter are connected with binding post A, binding post B, binding post C, post D respectively, then the switch S 1 that pushes button, power connection, LED does not work, after the switch S that pushes button 2, if LED is lighted, and while adjusting adjustable resistance Rp resistance value, the luminous intensity of LED can change, illustrate that photoelectrical coupler is normal, vice versa.
Claims (2)
1. a voltage stabilizing photoelectrical coupler testing circuit, it is characterized in that comprising, DC-stabilized circuit, the 3V DC voltage of DC-stabilized circuit output is connected with keyswitch S1 one end, keyswitch S1Yi road is connected with binding post A with after keyswitch S2, adjustable resistance Rp, resistance R 1 series connection, after 2 series connection of another road of keyswitch S1 and resistance R, be connected binding post C ground connection, the post D ground connection afterwards of connecting with LED with binding post B; Described DC-stabilized circuit is connected to form successively by reduction voltage circuit, rectification circuit, filtering circuit, mu balanced circuit, stable output 3V DC voltage; Described reduction voltage circuit utilizes transformer T1 by 220V alternating voltage step-down output 6V voltage, and described rectification circuit is the rectifier bridge of four diode compositions, and described filtering circuit is made up of capacitor C in parallel 1 and capacitor C 2; Described mu balanced circuit is by resistance R 3, diode U1, and triode Q1, resistance R 4 and resistance R 5 form; When test, the anode of single channel photoelectrical coupler to be measured, collector, negative electrode, emitter are connected with binding post A, binding post B, binding post C, post D respectively.
2. a kind of voltage stabilizing photoelectrical coupler testing circuit according to claim 1, is characterized in that described adjustable resistance Rp is 220 Ω adjustable resistances, and resistance R 1 is 220 Ω resistance, and resistance R 2 is 330 Ω resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320606857.9U CN203658480U (en) | 2013-09-29 | 2013-09-29 | Voltage-stabilization photoelectric coupler detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320606857.9U CN203658480U (en) | 2013-09-29 | 2013-09-29 | Voltage-stabilization photoelectric coupler detection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203658480U true CN203658480U (en) | 2014-06-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320606857.9U Expired - Fee Related CN203658480U (en) | 2013-09-29 | 2013-09-29 | Voltage-stabilization photoelectric coupler detection circuit |
Country Status (1)
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| CN (1) | CN203658480U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110174576A (en) * | 2019-06-27 | 2019-08-27 | 湖南联诚轨道装备有限公司 | A kind of Optocoupler detection device |
-
2013
- 2013-09-29 CN CN201320606857.9U patent/CN203658480U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110174576A (en) * | 2019-06-27 | 2019-08-27 | 湖南联诚轨道装备有限公司 | A kind of Optocoupler detection device |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140618 Termination date: 20150929 |
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| EXPY | Termination of patent right or utility model |