CN204256126U - A kind of actuating of relay testing circuit - Google Patents
A kind of actuating of relay testing circuit Download PDFInfo
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- CN204256126U CN204256126U CN201420690239.1U CN201420690239U CN204256126U CN 204256126 U CN204256126 U CN 204256126U CN 201420690239 U CN201420690239 U CN 201420690239U CN 204256126 U CN204256126 U CN 204256126U
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- optocoupler
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- testing circuit
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Abstract
The utility model relates to a kind of structure and the simple actuating of relay testing circuit of function, and comprise relay, driving circuit, testing circuit, described driving circuit and testing circuit are linked together by relay; This actuating of relay testing circuit, do not need independent current source to power, it has alternating current-direct current measuring ability, and isolating withstand voltage interchange in one minute can not damage, and takes up room less, a kind of actuating of relay testing circuit that production cost is low.
Description
Technical field
The utility model belongs to electricity field, particularly in electric system, and a kind of actuating of relay testing circuit.
Background technology
Testing circuit in available circuit is of a great variety, and most structure and function complexity, and need independent current source to power, do not possess alternating current-direct current measuring ability, checkout equipment is taken up room comparatively large, and the instability of the testing circuit of complexity behind and unreliability factors also can increase thereupon, and after being out of order, need detection and maintenace point also can increase thereupon, reduce the qualification rate of product virtually, add production cost.
Utility model content
For solving the problem, the utility model provides a kind of structure and the simple testing circuit of function, independent current source is not needed to power, it has alternating current-direct current measuring ability, isolate withstand voltage interchange 4000V in mono-minute can not damage, take up room less, a kind of actuating of relay testing circuit that production cost is low.
The utility model realizes by the following technical solutions:
A kind of actuating of relay testing circuit, comprise relay, driving circuit, testing circuit, described driving circuit and testing circuit are linked together by relay;
Described driving circuit, comprise resistance R2, resistance R3, resistance R4, resistance R5, optocoupler OP3, triode Q1, triode Q2, diode D1, Power of SCM System, relay driving power, one end of described resistance R2 connects Power of SCM System, the other end connects the positive input of optocoupler OP3, the emitter of another input end connecting triode Q1 of optocoupler OP3, the driving power of the collector output contact relay of optocoupler OP3, the negative pole of another output terminating diode D1 of optocoupler OP3 and relay, the base stage contact resistance R3 of triode Q1, the collector of the collector connecting triode Q2 of triode Q1, the other end of resistance R3 is connected on an output port of single-chip microcomputer, the emitter contact resistance R5 of triode Q2 and ground connection, the base stage contact resistance R4 of triode Q2, the other end contact resistance R4 of resistance R5, the other end of resistance R4 is connected on another output port of single-chip microcomputer,
Described testing circuit comprises resistance R1, electric capacity C1, optocoupler OP1, optocoupler OP2, power supply, the positive input of described optocoupler OP1 connects the negative input of optocoupler OP2, be connected with relay together again, another input end of optocoupler OP1 connects the positive input of optocoupler OP2, be connected with relay together again, the collector output of optocoupler OP1 is connected with resistance R1, the emitter output head grounding of optocoupler OP1, ground connection after the collector output of optocoupler OP2 is connected with electric capacity C1, the emitter output head grounding of optocoupler OP1, the other end of resistance R1 connects power supply, the collector output of optocoupler OP1 is connected with the collector output of optocoupler OP2 and is connected to the input port of single-chip microcomputer.
In described driving circuit, described Power of SCM System is 3.3V, and described relay driving power is 12V.
In described testing circuit, described power supply is the 3.3V power supply of Single Chip Microcomputer (SCM) system.
The current-limiting resistance detecting optocoupler is set in optocoupler OP1 and optocoupler OP2 in described testing circuit, this current-limiting resistance one end is connected with optocoupler negative input, the other end is connected on relay, the resistance of current-limiting resistance can be modified according to different situations, ensure that the On current of optocoupler has 1-2 milliampere just passable, the maximum drive current of optocoupler can not be exceeded.
In described testing circuit, electric capacity C1 is ceramic disc capacitor.
Described relay is that output relay has normally opened contact and normally closed contact.
Described driving circuit, wherein triode Q1 and triode Q2 is two-stage switch, and only when two switches are opened simultaneously, relay could work, and two-stage switch plays the object preventing relay misoperation from doing.
In described testing circuit, resistance R1 plays pull-up resistor effect, is the reliable high level output of circuit with stable; Electric capacity C1 function is filtering, the signal ripple detected is reduced, is convenient to microprocessor detect.
The Cleaning Principle of this actuating of relay testing circuit is: be low level when single-chip microcomputer exports KZ1 one end simultaneously, time other end KZ2 is high level, optocoupler OP3 conducting, output relay has electric current to flow through, the actuating of relay, and normally closed contact disconnects, normally opened contact closes, after normally opened contact is closed, relay 2 is identical with 3 pin level, and optocoupler OP1 and optocoupler OP2 not conducting, be connected to the input port of single-chip microcomputer by R1 pull-up.Microprocessor detect, to high level, can judge that relay has action.After relay resets, normally closed contact closes, normally opened contact disconnects, there is voltage difference in relay 2 and 3 pin, if what relay was external is alternating current, time so alternating current is by optocoupler OP1 and optocoupler OP2, always have an optocoupler conducting, the level being connected to the input port of single-chip microcomputer can become a low level.
If what relay was external is direct current, no matter direction of current how, also can ensure an optocoupler conducting, and make the level of the input port being connected to single-chip microcomputer be low, when microprocessor detect is low level to this time, just can judge that relay is now in non-action status.
If relay access is high pressure, needs to consider the withstand voltage of resistance, withstand voltage high resistance be selected.
Accompanying drawing explanation
Fig. 1 is the Cleaning Principle of actuating of relay testing circuit of the present utility model;
Fig. 2 is the circuit block diagram of actuating of relay testing circuit of the present utility model
Embodiment
Below in conjunction with Figure of description, actuating of relay testing circuit of the present utility model is described in further detail.
See Fig. 2, a kind of actuating of relay testing circuit of the utility model, comprise relay R ELAY1, driving circuit, testing circuit, described driving circuit and testing circuit are linked together by relay R ELAY1, described driving circuit, comprise resistance R2, resistance R3, resistance R4, resistance R5, optocoupler OP3, triode Q1, triode Q2, diode D1, Power of SCM System, relay driving power, it is 3.3V that one end of described resistance R2 connects Power of SCM System, the other end connects the positive input of optocoupler OP3, the emitter of another input end connecting triode Q1 of optocoupler OP3, the collector output contact relay driving power 12V of optocoupler OP3, the negative pole of another output terminating diode D1 of optocoupler OP3 and relay, the base stage contact resistance R3 of triode Q1, the collector of the collector connecting triode Q2 of triode Q1, the other end KZ1 of resistance R3 is connected on an output port of single-chip microcomputer, the emitter contact resistance R5 of triode Q2 and ground connection, the base stage contact resistance R4 of triode Q2, the other end contact resistance R4 of resistance R5, the other end KZ2 of resistance R4 is connected on another output port of single-chip microcomputer,
Described testing circuit comprises resistance R1, ceramic disc capacitor C1, optocoupler OP1, optocoupler OP2, the 3.3V power supply of Single Chip Microcomputer (SCM) system, the positive input of described optocoupler OP1 connects the negative input of optocoupler OP2, contact resistance R6 with R7 is connected with relay together again, another input end of optocoupler OP1 connects the positive input of optocoupler OP2, contact resistance R8 with R9 is connected with relay together again, the collector output of optocoupler OP1 is connected with resistance R1, the emitter output head grounding of optocoupler OP1, ground connection after the collector output of optocoupler OP2 is connected with electric capacity C1, the emitter output head grounding of optocoupler OP1, the other end of resistance R1 connects the 3.3V power supply of Single Chip Microcomputer (SCM) system, the collector output of optocoupler OP1 is connected with the collector output of optocoupler OP2 and is connected to the input port of single-chip microcomputer.
Described relay is that output relay has normally opened contact and normally closed contact.
Above embodiment is only be described preferred implementation of the present utility model; not scope of the present utility model is limited; under the prerequisite not departing from the utility model design spirit; the various distortion that the common engineering technical personnel in this area make the technical solution of the utility model and improvement, all should fall in protection domain that claims of the present utility model determine.
Claims (7)
1. an actuating of relay testing circuit, is characterized in that comprising relay, driving circuit, testing circuit, and described driving circuit and testing circuit are linked together by relay;
Described driving circuit, comprise resistance R2, resistance R3, resistance R4, resistance R5, optocoupler OP3, triode Q1, triode Q2, diode D1, Power of SCM System, relay driving power, one end of described resistance R2 connects Power of SCM System, the other end connects the positive input of optocoupler OP3, the emitter of another input end connecting triode Q1 of optocoupler OP3, the driving power of the collector output contact relay of optocoupler OP3, the negative pole of another output terminating diode D1 of optocoupler OP3 and relay, the base stage contact resistance R3 of triode Q1, the collector of the collector connecting triode Q2 of triode Q1, the other end of resistance R3 is connected on an output port of single-chip microcomputer, the emitter contact resistance R5 of triode Q2 and ground connection, the base stage contact resistance R4 of triode Q2, the other end contact resistance R4 of resistance R5, the other end of resistance R4 is connected on another output port of single-chip microcomputer,
Described testing circuit comprises resistance R1, electric capacity C1, optocoupler OP1, optocoupler OP2, power supply, the positive input of described optocoupler OP1 connects the negative input of optocoupler OP2, be connected with relay together again, another input end of optocoupler OP1 connects the positive input of optocoupler OP2, be connected with relay together again, the collector output of optocoupler OP1 is connected with resistance R1, the emitter output head grounding of optocoupler OP1, ground connection after the collector output of optocoupler OP2 is connected with electric capacity C1, the emitter output head grounding of optocoupler OP1, the other end of resistance R1 connects power supply, the collector output of optocoupler OP1 is connected with the collector output of optocoupler OP2 and is connected to the input port of single-chip microcomputer.
2. actuating of relay testing circuit according to claim 1, is characterized in that described relay is that output relay has normally opened contact and normally closed contact.
3. actuating of relay testing circuit according to claim 1, is characterized in that in the driving circuit of described relay, and described Power of SCM System is 3.3V, and described relay driving power is 12V.
4. actuating of relay testing circuit according to claim 1, is characterized in that in described relay test circuit, and described power supply is the 3.3V power supply of Single Chip Microcomputer (SCM) system.
5. actuating of relay testing circuit according to claim 1, is characterized in that arranging the current-limiting resistance detecting optocoupler in described relay test circuit in optocoupler OP1 and optocoupler OP2.
6. actuating of relay testing circuit according to claim 5, is characterized in that the current-limiting resistance of described detection optocoupler is connected with optocoupler negative input.
7. actuating of relay testing circuit according to claim 1, is characterized in that in described relay test circuit, electric capacity C1 is ceramic disc capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420690239.1U CN204256126U (en) | 2014-11-18 | 2014-11-18 | A kind of actuating of relay testing circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420690239.1U CN204256126U (en) | 2014-11-18 | 2014-11-18 | A kind of actuating of relay testing circuit |
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| CN204256126U true CN204256126U (en) | 2015-04-08 |
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| CN201420690239.1U Active CN204256126U (en) | 2014-11-18 | 2014-11-18 | A kind of actuating of relay testing circuit |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109254244A (en) * | 2018-10-10 | 2019-01-22 | 中国核动力研究设计院 | A kind of diagnostic system of relay contact failure |
| CN109342935A (en) * | 2018-10-08 | 2019-02-15 | 珠海格力电器股份有限公司 | A kind of DC bus charging circuit relay failure detection device, method and motor |
| CN110888053A (en) * | 2019-12-19 | 2020-03-17 | 上海怿星电子科技有限公司 | Relay detection device, detection system and detection method |
-
2014
- 2014-11-18 CN CN201420690239.1U patent/CN204256126U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109342935A (en) * | 2018-10-08 | 2019-02-15 | 珠海格力电器股份有限公司 | A kind of DC bus charging circuit relay failure detection device, method and motor |
| CN109254244A (en) * | 2018-10-10 | 2019-01-22 | 中国核动力研究设计院 | A kind of diagnostic system of relay contact failure |
| CN110888053A (en) * | 2019-12-19 | 2020-03-17 | 上海怿星电子科技有限公司 | Relay detection device, detection system and detection method |
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| GR01 | Patent grant |