CN102798817A - Relay fault detection circuit and fault detection method thereof - Google Patents
Relay fault detection circuit and fault detection method thereof Download PDFInfo
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- CN102798817A CN102798817A CN2011101383430A CN201110138343A CN102798817A CN 102798817 A CN102798817 A CN 102798817A CN 2011101383430 A CN2011101383430 A CN 2011101383430A CN 201110138343 A CN201110138343 A CN 201110138343A CN 102798817 A CN102798817 A CN 102798817A
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Abstract
The invention discloses a relay fault detection circuit, which comprises a relay control part, a first resistor, a second resistor, a voltage source, a transistor, a voltage sampling unit and a control unit, wherein the transistor is provided with a base, a collector and an emitter; one end of the relay control part is connected with a power supply through the first resistor; the other end of the relay control part is connected with the collector of the transistor; the emitter of the transistor is grounded sequentially through the second resistor and the voltage source; the base of the transistor is connected with the voltage sampling unit through the control unit; a point T is randomly arranged on a connection wire for connecting the first resistor and one end of the relay control part; the voltage sampling unit is connected with the point T through the connection wire; and the control unit can determine a broken circuit or a faulted relay according to a voltage value of the point T acquired by the voltage sampling unit. By the relay fault detection circuit, the shortcoming that a worker cannot accurately determine the fault of the relay and cannot take corresponding processing measures in the prior art is overcome.
Description
Technical field
The present invention is specifically related to a kind of relay fault detecting circuit and fault detection method thereof.
Background technology
Along with keep reforming technologically, the use of relay is more and more frequent, and more convenient brought to people, yet, if in a single day relay breaks down, can't carry out break-make exactly, thereby bring serious potential safety hazard to electrical equipment.
The control circuit of existing relay is not generally established special failure detector circuit; Judge but report to the police through other input voltages with electric parts; Yet the reason that causes fault possibly appear on the relay circuit of control distribution; Therefore, this mode of prior art has following problem: one, the uncertainty of fault origination point needs could to confirm through detailed diagnosis which parts breaks down and causes; Even losing efficacy appears in two control relay circuits, also difficult judging is where circuit occurs opening circuit or the fault of short circuit; Three, for some parts that do not have the input voltage detection, can't in time send warning to the relay unusual condition.
Summary of the invention
The present invention is for solving the control circuit that has relay now owing to do not establish special failure detector circuit; Can't judge it specifically is the technical matters that which section wire harness or relay itself break down, a kind of relay fault detecting circuit and fault detection method thereof are provided.
Technical scheme of the present invention is:
A kind of relay fault detecting circuit; The control section, first resistance, second resistance, voltage source, transistor, voltage sample unit and the control module that comprise relay; Said transistor has base stage, collector and emitter; Control section one end of said relay links to each other with power supply through first resistance; The control section other end of relay links to each other with transistorized collector, and transistorized emitter is successively through second resistance, voltage source ground connection, and transistorized base stage links to each other with the voltage sample unit through control module; And on the connecting line of control section one end that connects first resistance and relay, establish T point arbitrarily; Be connected through connecting line between said voltage sample unit and the T point, be used for gathering in real time the voltage that T is ordered, control module judges it specifically is that which partly opens circuit or relay breaks down according to the T point voltage value of voltage sample unit collection.
A kind of fault detection method of relay fault detecting circuit; Relay fault detecting circuit comprises control section, first resistance, second resistance, voltage source, transistor, voltage sample unit and the control module of relay; Said transistor has base stage, collector and emitter; Control section one end of said relay links to each other with power supply through first resistance, and the control section other end of relay links to each other with transistorized collector, and transistorized emitter is successively through second resistance, voltage source ground connection; Transistorized base stage links to each other with the voltage sample unit through control module; And on the connecting line of control section one end that connects first resistance and relay, establish T point arbitrarily, be connected through connecting line between said voltage sample unit and the T point, wherein fault detection method may further comprise the steps:
Step S1: the voltage sample unit is gathered the voltage that T is ordered in real time;
Step S2: control module receives and judges it specifically is that which partly opens circuit or relay breaks down according to the T point voltage value that the voltage sample unit is gathered in real time.
Advantage of the present invention: can learn from technique scheme of the present invention; Control section, first resistance, second resistance, voltage source, transistor, voltage sample unit and the control module of a kind of relay fault detecting circuit through comprising relay; Said transistor has base stage, collector and emitter; Control section one end of said relay links to each other with power supply through first resistance; The control section other end of relay links to each other with transistorized collector, and transistorized emitter is successively through second resistance, voltage source ground connection, and transistorized base stage links to each other with the voltage sample unit through control module; And on the connecting line of control section one end that connects first resistance and relay, establish T point arbitrarily; Be connected through connecting line between said voltage sample unit and the T point, be used for gathering in real time the voltage that T is ordered, control module judges it specifically is that which partly opens circuit or relay breaks down according to the T point voltage value of voltage sample unit collection.Than prior art; Relay fault detecting circuit of the present invention can judge it specifically is that which partly opens circuit or relay breaks down well; The correspondingly drawback of treatment measures is taked in inconvenience to have avoided the staff owing to can't accurately confirm the fault origination point, so the fault detect that the invention enables relay more reliably and more accurate.
In like manner; Can learn from the technical scheme of the fault detection method of relay fault detecting circuit of the present invention; The fault detection method of relay fault detecting circuit of the present invention also can judge well concrete which partly open circuit or relay self breaks down; The correspondingly drawback of treatment measures is taked in inconvenience to have avoided the staff owing to can't accurately confirm the fault origination point, so the fault detection method that the invention enables relay more reliably and more accurate.
Description of drawings
The structured flowchart of the embodiment that Fig. 1 provides for relay fault detecting circuit of the present invention.
The method flow diagram of the embodiment that Fig. 2 provides for the fault detection method of relay fault detecting circuit of the present invention.
Embodiment
Clearer for technical matters, technical scheme and beneficial effect that the present invention is solved, below in conjunction with accompanying drawing and embodiment, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
Before describing specific embodiment of the present invention, what need explanation is, the present invention is the failure detector circuit to relay, and therefore, the present invention can be applicable to arbitrary circuit or device with relay.
As shown in Figure 1; A kind of relay 1 failure detector circuit comprises control section, first resistance R 1, second resistance R 2, voltage source Uref, transistor Q1, voltage sample unit 3 and the control module 2 of relay 1; Said transistor Q1 has base stage, collector and emitter; Control section one end of said relay 1 links to each other with power supply Us through first resistance R 1; The control section other end of relay 1 links to each other with the collector of transistor Q1, and the emitter of transistor Q1 is successively through second resistance R 2, voltage source Uref ground connection, and the base stage of transistor Q1 links to each other with voltage sample unit 3 through control module 2; And on the connecting line of control section one end that connects first resistance R 1 and relay 1, establish T point arbitrarily; Be connected through connecting line between said voltage sample unit 3 and the T point, be used for gathering in real time the voltage that T is ordered, the T point voltage value that control module 2 is gathered according to voltage sample unit 3 judges it specifically is that which partly opens circuit or relay 1 breaks down; Thereby make the staff can accurately find out the fault origination point and then take correspondingly treatment measures, bring more convenience therefore for the use of relay 1.
In the practical implementation, the value of said voltage source Uref deducts the difference of the rated operational voltage of relay 1 less than supply voltage Us voltage.
In the practical implementation, said control module 2 is ECU, and certainly, the control module 2 of present embodiment is not limited to ECU, can also not be described in detail at this for other device with above-mentioned arbitration functions.
In the practical implementation, said connecting line is a wire harness, can also have the connecting line of above-mentioned functions certainly for other, for example lead etc.
The present invention also provides a kind of fault detection method of relay 1 failure detector circuit; Wherein, Relay 1 failure detector circuit is as shown in Figure 1, comprises control section, first resistance R 1, second resistance R 2, voltage source Uref, transistor Q1, voltage sample unit 3 and the control module 2 of relay 1, and said transistor Q1 has base stage, collector and emitter; Control section one end of said relay 1 links to each other with power supply Us through first resistance R 1; The control section other end of relay 1 links to each other with the collector of transistor Q1, and the emitter of transistor Q1 is successively through second resistance R 2, voltage source Uref ground connection, and the base stage of transistor Q1 links to each other with voltage sample unit 3 through control module 2; And on the connecting line of control section one end that connects first resistance R 1 and relay 1, establish T point arbitrarily; Be connected through connecting line between said voltage sample unit 3 and the T point, wherein fault detection method is as shown in Figure 2, may further comprise the steps:
Step 21: voltage sample unit 3 is gathered the voltage that T is ordered in real time;
Step 21: the T point voltage value that control module 2 is gathered according to voltage sample unit 3 in real time judges it specifically is that which partly opens circuit or relay 1 breaks down.It is understandable that; Any fault during the control module 2 of this step also can be judged according to the T point voltage values that voltage sample unit 3 is gathered in real time belong to specifically that sampling section opens circuit, power unit opens circuit, the control section short circuit of relay and control section open circuit; Consult Fig. 1, wherein
Sampling section opens circuit and is meant that the T point is to opening circuit between the voltage sample unit 3;
Power unit opens circuit and is meant that power supply Us is to opening circuit between the T point;
The control section short circuit of relay is meant that the T point to the short circuit between the S point (being to comprise relay 1 self short circuit) with being appreciated that;
Control section opens circuit and is meant that the T point is to opening circuit between the S point.
Above-mentioned S point is meant any point on the connecting line of the control section other end that connects relay and transistor Q1 collector.
It is understandable that, in the present embodiment, thereby control module through oxide-semiconductor control transistors whether the conducting pilot relay control section (being coil) whether electric, thereby the Be Controlled of pilot relay part (switch promptly gets an electric shock) is closed or break off.Because this is the state of the art, and is not main improvement of the present invention, therefore, this partial content is not described in detail.
In the practical implementation, the value of said voltage source Uref deducts the difference of the rated operational voltage of relay 1 less than power supply Us voltage.
In the practical implementation, said control module 2 is ECU.
As a preferred version of present embodiment, the T point voltage values that above-mentioned control module 2 is gathered according to voltage sample unit 3 in real time judge belong to specifically that sampling section opens circuit, power unit opens circuit, the control section short circuit of relay and the control section any fault in opening circuit is specially:
The T point voltage value u that gathers when voltage sample unit 3
t=0 o'clock, control module 2 judged that sampling section opens circuit;
The T point voltage value u that gathers when voltage sample unit 3
tDuring=uref, control module 2 judges that power supply Us partly opens circuit;
The T point voltage value u that gathers when voltage sample unit 3
t=
The time, control module 2 is judged the control section short circuit of relay 1;
The T point voltage value u that gathers when voltage sample unit 3
tDuring=Us, control module 2 judges that control section opens circuit; Wherein us is a supply voltage, and r1 is the resistance of first resistance, and r2 is the resistance of second resistance, and uref is the terminal voltage of voltage source.
As the further preferred version of the foregoing description, above-mentioned steps 23 comprises also the T point voltage value that control module 2 is gathered according to voltage sample unit 3 in real time judges whether the The whole control circuit of relay 1 is normal, wherein
The T point voltage value u that gathers when voltage sample unit 3
t=
The time; Control module 2 judges that the The whole control circuit of relay 1 is normal, and wherein us is a supply voltage, and r1 is the resistance of first resistance; R2 is the resistance of second resistance; R3 is the resistance (for the art technology people, this is easy to obtain) of relay equivalent resistance, and uref is the terminal voltage of voltage source.
The above is merely preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of within spirit of the present invention and principle, being done, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. relay fault detecting circuit; It is characterized in that; The control section, first resistance, second resistance, voltage source, transistor, voltage sample unit and the control module that comprise relay; Said transistor has base stage, collector and emitter, and control section one end of said relay links to each other with power supply through first resistance, and the control section other end of relay links to each other with transistorized collector; Transistorized emitter is successively through second resistance, voltage source ground connection; Transistorized base stage links to each other with the voltage sample unit through control module, and on the connecting line of control section one end of connection first resistance and relay, establishes T point arbitrarily, is connected through connecting line between said voltage sample unit and the T point; Be used for gathering in real time the voltage that T is ordered, control module judges it specifically is that which partly opens circuit or relay breaks down according to the T point voltage value of voltage sample unit collection.
2. relay fault detecting circuit according to claim 1 is characterized in that, the terminal voltage of said voltage source deducts the difference of the rated operational voltage of relay less than supply voltage.
3. relay fault detecting circuit according to claim 1 and 2 is characterized in that, said control module is ECU.
4. relay fault detecting circuit according to claim 1 and 2 is characterized in that, said connecting line is a wire harness.
5. the fault detection method of a relay fault detecting circuit; Relay fault detecting circuit comprises control section, first resistance, second resistance, voltage source, transistor, voltage sample unit and the control module of relay; Said transistor has base stage, collector and emitter; Control section one end of said relay links to each other with power supply through first resistance, and the control section other end of relay links to each other with transistorized collector, and transistorized emitter is successively through second resistance, voltage source ground connection; Transistorized base stage links to each other with the voltage sample unit through control module; And on the connecting line of control section one end that connects first resistance and relay, establish T point arbitrarily, be connected through connecting line between said voltage sample unit and the T point, wherein fault detection method may further comprise the steps:
Step S1: the voltage sample unit is gathered the voltage that T is ordered in real time;
Step S2: control module receives and judges it specifically is that which partly opens circuit or relay breaks down according to the T point voltage value that the voltage sample unit is gathered in real time.
6. the fault detection method of relay fault detecting circuit according to claim 5 is characterized in that, the terminal voltage of said voltage source deducts the difference of the rated operational voltage of relay less than supply voltage.
7. the fault detection method of relay fault detecting circuit according to claim 5 is characterized in that, said control module is ECU.
8. according to the fault detection method of claim 5,6 or 7 described relay fault detecting circuits, it is characterized in that said step S3 comprises:
The T point voltage value that control module is gathered in real time according to the voltage sample unit judge belong to specifically that sampling section opens circuit, power unit opens circuit, the control section short circuit of relay and the control section any fault in opening circuit, wherein
Said sampling section opens circuit and is meant that the T point is to opening circuit between the voltage sample unit;
Said power unit opens circuit and is meant that power supply is to opening circuit between the T point;
The control section short circuit of said relay is meant that the T point is to the short circuit between the S point;
Said control section opens circuit and is meant that the T point is to opening circuit between the S point;
Above-mentioned S point is meant any point on the connecting line of the control section other end that connects relay and transistor collector.
9. the fault detection method of relay fault detecting circuit according to claim 8 is characterized in that,
The T point voltage value u that gathers when the voltage sample unit
t=0 o'clock, control module judged that sampling section opens circuit;
The T point voltage value u that gathers when the voltage sample unit
tDuring=uref, control module judges that power unit opens circuit;
The T point voltage value u that gathers when the voltage sample unit
t=
The time, control module is judged the control section short circuit of relay;
The T point voltage value u that gathers when the voltage sample unit
tDuring=us, control module judges that control section opens circuit; Wherein us is a supply voltage, and r1 is the resistance of first resistance, and r2 is the resistance of second resistance, and uref is the terminal voltage of voltage source.
10. the fault detection method of relay fault detecting circuit according to claim 9 is characterized in that, step S3 comprises also the T point voltage value that control module is gathered according to the voltage sample unit in real time judges whether the The whole control circuit of relay is normal, wherein
The T point voltage value u that gathers when the voltage sample unit
t=
The time, control module judges that the The whole control circuit of relay is normal. wherein us is a supply voltage, and r1 is the resistance of first resistance, and r2 is the resistance of second resistance, and r3 is the resistance of relay equivalent resistance, and uref is the terminal voltage of voltage source.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110138343.0A CN102798817B (en) | 2011-05-26 | 2011-05-26 | A kind of relay fault detecting circuit and fault detection method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110138343.0A CN102798817B (en) | 2011-05-26 | 2011-05-26 | A kind of relay fault detecting circuit and fault detection method thereof |
Publications (2)
| Publication Number | Publication Date |
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| CN102798817A true CN102798817A (en) | 2012-11-28 |
| CN102798817B CN102798817B (en) | 2015-08-26 |
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| CN201110138343.0A Active CN102798817B (en) | 2011-05-26 | 2011-05-26 | A kind of relay fault detecting circuit and fault detection method thereof |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103207343A (en) * | 2013-01-15 | 2013-07-17 | 镇江明润信息科技有限公司 | Line break detection device for DC (direct current) remote control actuator |
| CN104034996A (en) * | 2014-06-04 | 2014-09-10 | 安徽江淮汽车股份有限公司 | Detection circuit for high-voltage connector |
| CN104181438A (en) * | 2014-08-28 | 2014-12-03 | 长城汽车股份有限公司 | Fault detection circuit, method and device |
| CN104345267A (en) * | 2013-07-24 | 2015-02-11 | 西安宝力电子科技有限公司 | Aging and early failure detection method and detection apparatus of solid relay |
| CN104453527A (en) * | 2014-11-28 | 2015-03-25 | 深圳市方大自动化系统有限公司 | Safety relay module with fault monitoring function, safety relay unit and monitoring method thereof |
| CN104701807A (en) * | 2015-03-19 | 2015-06-10 | 西电通用电气自动化有限公司 | Relay protecting device exit relay actuating coil self-detecting module and method |
| CN105048301A (en) * | 2015-06-23 | 2015-11-11 | 浪潮软件集团有限公司 | Intelligent power box capable of detecting output voltage and self-repairing faults |
| CN106026054A (en) * | 2016-08-08 | 2016-10-12 | 许继集团有限公司 | Digital output self-inspection circuit |
| CN107748305A (en) * | 2017-09-26 | 2018-03-02 | 九阳股份有限公司 | A kind of water purifier fault detection method and circuit |
| CN107850643A (en) * | 2016-02-19 | 2018-03-27 | 株式会社Lg化学 | For the apparatus and method for the failure for diagnosing switch element |
| CN109471025A (en) * | 2018-11-09 | 2019-03-15 | 四川赛科安全技术有限公司 | The method that twin voltage realizes electromagnetic relay wireline inspection and feedback signal detection |
| CN110134055A (en) * | 2019-06-21 | 2019-08-16 | 厦门美图之家科技有限公司 | Self-shield heater circuit, beauty instrument, circuitry fault detection method and device |
| CN110361621A (en) * | 2018-04-11 | 2019-10-22 | 佛山市顺德区美的电热电器制造有限公司 | Load detecting circuit and method |
| CN111812492A (en) * | 2019-04-10 | 2020-10-23 | Sk新技术株式会社 | Battery management system and relay diagnosis device |
| CN112230132A (en) * | 2020-04-14 | 2021-01-15 | 北京新能源汽车技术创新中心有限公司 | High-voltage relay failure detection device and method for battery management system |
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| CN103207343A (en) * | 2013-01-15 | 2013-07-17 | 镇江明润信息科技有限公司 | Line break detection device for DC (direct current) remote control actuator |
| CN104345267B (en) * | 2013-07-24 | 2017-05-10 | 西安宝力电子科技有限公司 | Aging and early failure detection method and detection apparatus of solid relay |
| CN104345267A (en) * | 2013-07-24 | 2015-02-11 | 西安宝力电子科技有限公司 | Aging and early failure detection method and detection apparatus of solid relay |
| CN104034996A (en) * | 2014-06-04 | 2014-09-10 | 安徽江淮汽车股份有限公司 | Detection circuit for high-voltage connector |
| CN104181438A (en) * | 2014-08-28 | 2014-12-03 | 长城汽车股份有限公司 | Fault detection circuit, method and device |
| CN104453527A (en) * | 2014-11-28 | 2015-03-25 | 深圳市方大自动化系统有限公司 | Safety relay module with fault monitoring function, safety relay unit and monitoring method thereof |
| CN104701807A (en) * | 2015-03-19 | 2015-06-10 | 西电通用电气自动化有限公司 | Relay protecting device exit relay actuating coil self-detecting module and method |
| CN105048301A (en) * | 2015-06-23 | 2015-11-11 | 浪潮软件集团有限公司 | Intelligent power box capable of detecting output voltage and self-repairing faults |
| CN107850643A (en) * | 2016-02-19 | 2018-03-27 | 株式会社Lg化学 | For the apparatus and method for the failure for diagnosing switch element |
| CN107850643B (en) * | 2016-02-19 | 2020-02-21 | 株式会社Lg化学 | Device and method for diagnosing a fault of a switching element |
| CN106026054A (en) * | 2016-08-08 | 2016-10-12 | 许继集团有限公司 | Digital output self-inspection circuit |
| CN106026054B (en) * | 2016-08-08 | 2019-02-05 | 许继集团有限公司 | One kind outputing self-checking circuit |
| CN107748305A (en) * | 2017-09-26 | 2018-03-02 | 九阳股份有限公司 | A kind of water purifier fault detection method and circuit |
| CN107748305B (en) * | 2017-09-26 | 2020-05-19 | 杭州九阳净水系统有限公司 | Water purifier fault detection method and circuit |
| CN110361621A (en) * | 2018-04-11 | 2019-10-22 | 佛山市顺德区美的电热电器制造有限公司 | Load detecting circuit and method |
| CN109471025A (en) * | 2018-11-09 | 2019-03-15 | 四川赛科安全技术有限公司 | The method that twin voltage realizes electromagnetic relay wireline inspection and feedback signal detection |
| CN109471025B (en) * | 2018-11-09 | 2020-12-29 | 四川赛科安全技术有限公司 | Method for realizing electromagnetic relay line detection and feedback signal detection by double voltages |
| CN111812492A (en) * | 2019-04-10 | 2020-10-23 | Sk新技术株式会社 | Battery management system and relay diagnosis device |
| US11740289B2 (en) | 2019-04-10 | 2023-08-29 | Sk On Co., Ltd. | Relay examination device and battery management system |
| CN110134055A (en) * | 2019-06-21 | 2019-08-16 | 厦门美图之家科技有限公司 | Self-shield heater circuit, beauty instrument, circuitry fault detection method and device |
| CN110134055B (en) * | 2019-06-21 | 2020-11-10 | 厦门美图之家科技有限公司 | Self-protection heating circuit, beauty instrument, and line fault detection method and device |
| CN112230132A (en) * | 2020-04-14 | 2021-01-15 | 北京新能源汽车技术创新中心有限公司 | High-voltage relay failure detection device and method for battery management system |
| CN112230132B (en) * | 2020-04-14 | 2024-04-19 | 北京国家新能源汽车技术创新中心有限公司 | Device and method for detecting failure of high-voltage relay of battery management system |
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