CN103353569A - Relay connection state detecting apparatus - Google Patents

Relay connection state detecting apparatus Download PDF

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Publication number
CN103353569A
CN103353569A CN 201310256425 CN201310256425A CN103353569A CN 103353569 A CN103353569 A CN 103353569A CN 201310256425 CN201310256425 CN 201310256425 CN 201310256425 A CN201310256425 A CN 201310256425A CN 103353569 A CN103353569 A CN 103353569A
Authority
CN
China
Prior art keywords
relay
optical coupled
coupled switch
chip microprocessor
microprocessor mcu
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN 201310256425
Other languages
Chinese (zh)
Inventor
徐�明
杨志华
许诺
史玲玲
盛龙
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ANHUI WICOM NEW ENERGY TECHNOLOGY Co Ltd
Original Assignee
ANHUI WICOM NEW ENERGY TECHNOLOGY Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ANHUI WICOM NEW ENERGY TECHNOLOGY Co Ltd filed Critical ANHUI WICOM NEW ENERGY TECHNOLOGY Co Ltd
Priority to CN 201310256425 priority Critical patent/CN103353569A/en
Publication of CN103353569A publication Critical patent/CN103353569A/en
Pending legal-status Critical Current

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Abstract

The invention discloses a relay connection state detecting apparatus. The apparatus comprises an optical coupling switch Op_1, an optical coupling switch Op_2 and a single-chip microcomputer MCU. One output terminal of the optical coupling switch Op_1 is interposed between and connected with the anode of a battery Bat and a relay, and a resistor R2 is interposed between and connected with the other output terminal of the optical coupling switch Op_1 and an anode control end of the optical coupling switch Op_2. One control terminal of the optical coupling switch Op_2 is interposed between and connected with the relay and a resistor R1, while the other control terminal is connected to an output OUT_1 of the single-chip microcomputer MCU. One output terminal of the optical coupling switch Op_2 is connected to an input voltage VCC, while the other output terminal has two branches: one is connected to an input IN_1 of the single-chip microcomputer MCU, and the other one is grounded through a resistor R4. The apparatus provided by the invention has the advantages of simple method, simple circuit and clear control logic, and is efficient in the detection of relay connection state.

Description

A kind of relay device connection status detection
Technical field
The present invention relates to the electric relay detection device field, be specially a kind of relay device connection status detection.
Background technology
In the high-voltage great-current DC loop, because relay is in large current work, loud-break switch state for a long time, the phenomenon of relay contact sintering short circuit or disconnection can occur after use a period of time, affect the normal operation in loop, particularly can cause the excessive use to electric battery to cause security incident, therefore, need the connection status of major loop relay is carried out effective monitoring.
The method of current judgement relay connection status has a lot, and two schemes is typically arranged: the coil determining method that the relay coil on off state is detected, to the contact determining method of relay contact switch state-detection.The coil determining method is by judging electric current or the both end voltage on the coil, judge the switch of relay duty, but this method only can be judged relay contact coil working state under normal circumstances, can't judge the situation that relay contact damages, and does not meet final testing goal.
As shown in Figure 2.Fig. 2 is the synoptic diagram by voltage detection method detector switch state.Wherein, battery Bat, relay K 1, load R1 have formed the application loop, and 1 pair of loop of relay K is effectively protected.Single-chip microprocessor MCU is passed through operational amplifier Op AMP realization to the detection of relay both end voltage, and realizes detecting the control in loop by two switch Op_1 and Op_2.The method can effectively detect the voltage at relay two ends, is that 0V judges that it is in connection status by judging its voltage, and voltage then is off-state with Bat voltage.
This circuit can be realized the detection to the relay connection status, but circuit is complicated, detects loaded down with trivial detailsly, needs simple effective method more to realize the detection of relay connection status.
Summary of the invention
The purpose of this invention is to provide a kind of relay device connection status detection, the problem that exists to solve prior art.
In order to achieve the above object, the technical solution adopted in the present invention is:
A kind of relay device connection status detection, described relay one end connects the end of a load R1, the other end of load R1 connects the negative pole of a battery Bat, the positive pole of battery Bat connects the other end of relay, by relay, load R1, battery Bat consists of the loop, it is characterized in that: comprise optical coupled switch Op-_1, optical coupled switch Op-_2, single-chip microprocessor MCU, between described optical coupled switch Op-_1 collector output access battery Bat positive pole and the relay, be connected to resistance R 2 between optical coupled switch Op-_1 emitter output terminal and the optical coupled switch Op-_2 anodic control end, optical coupled switch Op-_2 cathodic control termination enters between relay and the resistance R 1, the anodic control termination of described optical coupled switch Op-_1 enters the output OUT_1 of single-chip microprocessor MCU, the cathodic control end of optical coupled switch Op-_1 is by resistance R 3 ground connection, the collector output access voltage VCC of optical coupled switch Op-_2, the emitter output terminal of optical coupled switch Op-_2 is divided into two-way, the input IN_1 of one tunnel access single-chip microprocessor MCU, another road is by resistance R 4 ground connection.
Described a kind of relay device connection status detection is characterized in that: described single-chip microprocessor MCU also is connected with relay coil RL.
Detection method circuit of the present invention is simpler, and steering logic is clear, is the efficient apparatus that actual effect relay connection status detects.
Description of drawings
Fig. 1 is circuit theory diagrams of the present invention.
Fig. 2 is the synoptic diagram that prior art is passed through voltage detection method detector switch state.
Embodiment
As shown in Figure 1.A kind of relay device connection status detection, relay K 1 one ends connect the end of a load R1, the other end of load R1 connects the negative pole of a battery Bat, the positive pole of battery Bat connects the other end of relay, by relay K 1, load R1, battery Bat consists of the loop, comprise optical coupled switch Op-_1, optical coupled switch Op-_2, single-chip microprocessor MCU, between optical coupled switch Op-_1 collector output access battery Bat positive pole and the relay, be connected to resistance R 2 between optical coupled switch Op-_1 emitter output terminal and the optical coupled switch Op-_2 anodic control end, optical coupled switch Op-_2 cathodic control termination enters between relay K 1 and the resistance R 1, the anodic control termination of optical coupled switch Op-_1 enters the output OUT_1 of single-chip microprocessor MCU, the cathodic control end of optical coupled switch Op-_1 is by resistance R 3 ground connection, the collector output access voltage VCC of optical coupled switch Op-_2, the emitter output terminal of optical coupled switch Op-_2 is divided into two-way, the input IN_1 of one tunnel access single-chip microprocessor MCU, another road is by resistance R 4 ground connection.Single-chip microprocessor MCU also is connected with relay K 1 coil RL.
Battery Bat, relay K 1, load R1 have formed the application loop; Single-chip microprocessor MCU, optical coupled switch Op_1, Op_2 and relevant current-limiting resistance R2, R3, R4 form the relay connection status and judge the loop.
Single-chip microprocessor MCU is by realizing the control to relay on-off to the management of relay K 1 coil RL.
Optical coupled switch Op_1 is in off-state when flat, the relay connection status of Op_1 output terminal and resistance R 2, optocoupler Op_2 control end composition is in off working state at this moment; Single-chip microprocessor MCU output this moment OUT_1 is that low level, single-chip microprocessor MCU input IN_1 are low level.
When single-chip microprocessor MCU need detect the relay connection status, control OUT_1 output high level, optical coupled switch Op_1 exports closed; If relay K 1 is in attracting state, relay K 1 both end voltage is 0V, and Op_1 output terminal and resistance R 2, optocoupler Op_2 control end loop both end voltage are 0 at this moment, does not work in the loop, optocoupler Op_1 does not work, thus single-chip microprocessor MCU detect its input IN_1 be low level.If relay K 1 is in off-state, relay K 1 both end voltage is with battery Bat voltage, this moment, the Op_1 output terminal also existed with the identical pressure drop of battery Bat terminal voltage with the two ends, loop that resistance R 2, optocoupler Op_2 control end form, but this loop conducting work, optocoupler Op_1 output is in closure state, this moment single-chip microprocessor MCU to detect its input IN_1 be high level.
Therefore, when single-chip microprocessor MCU output OUT_1 was high level, control optical coupled switch Op_1 output was closed, if single-chip microprocessor MCU input this moment IN_1 is low level, then relay K 1 is in connection status; If single-chip microprocessor MCU input IN_1 is high level, then relay K 1 is in off-state.
And then single-chip microprocessor MCU also can in conjunction with the state of a control to relay K 1 coil RL, judge whether relay is working properly.If the coil RL adhesive of single-chip microprocessor MCU pilot relay K1, and relay K 1 is in off-state can judge that then relay K 1 output opens circuit normally adhesive; If the coil RL of single-chip microprocessor MCU pilot relay K1 disconnects, and relay K 1 is in attracting state, then can judge the phenomenons such as sintering to occur by relay K 1 output short-circuit, can not normally disconnect.These situations all need relay is again overhauled or changes, to guarantee the normal operation in loop.

Claims (2)

1. relay device connection status detection, described relay one end connects the end of a load R1, the other end of load R1 connects the negative pole of a battery Bat, the positive pole of battery Bat connects the other end of relay, by relay, load R1, battery Bat consists of the loop, it is characterized in that: comprise optical coupled switch Op-_1, optical coupled switch Op-_2, single-chip microprocessor MCU, between described optical coupled switch Op-_1 collector output access battery Bat positive pole and the relay, be connected to resistance R 2 between optical coupled switch Op-_1 emitter output terminal and the optical coupled switch Op-_2 anodic control end, optical coupled switch Op-_2 cathodic control termination enters between relay and the resistance R 1, the anodic control termination of described optical coupled switch Op-_1 enters the output OUT_1 of single-chip microprocessor MCU, the cathodic control end of optical coupled switch Op-_1 is by resistance R 3 ground connection, the collector output access voltage VCC of optical coupled switch Op-_2, the emitter output terminal of optical coupled switch Op-_2 is divided into two-way, the input IN_1 of one tunnel access single-chip microprocessor MCU, another road is by resistance R 4 ground connection.
2. a kind of relay device connection status detection according to claim 1, it is characterized in that: described single-chip microprocessor MCU also is connected with relay coil RL.
CN 201310256425 2013-06-25 2013-06-25 Relay connection state detecting apparatus Pending CN103353569A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201310256425 CN103353569A (en) 2013-06-25 2013-06-25 Relay connection state detecting apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201310256425 CN103353569A (en) 2013-06-25 2013-06-25 Relay connection state detecting apparatus

Publications (1)

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CN103353569A true CN103353569A (en) 2013-10-16

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CN (1) CN103353569A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
CN105182149A (en) * 2015-07-29 2015-12-23 深圳市方大自动化系统有限公司 Line disconnection detection circuit for anti-clamping device between subway platform door and train body
CN108832673A (en) * 2018-06-06 2018-11-16 西安特锐德智能充电科技有限公司 The starting method for measuring charged of DC charging system, PDU and charging path
CN109254245A (en) * 2018-11-07 2019-01-22 紫光测控有限公司 A kind of short circuit of relay circuit and open detection circuit

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
CN105182149A (en) * 2015-07-29 2015-12-23 深圳市方大自动化系统有限公司 Line disconnection detection circuit for anti-clamping device between subway platform door and train body
CN105182149B (en) * 2015-07-29 2018-01-23 深圳市方大自动化系统有限公司 Anti-pinch device break detection circuit between a kind of subway platform door and train body
CN108832673A (en) * 2018-06-06 2018-11-16 西安特锐德智能充电科技有限公司 The starting method for measuring charged of DC charging system, PDU and charging path
CN109254245A (en) * 2018-11-07 2019-01-22 紫光测控有限公司 A kind of short circuit of relay circuit and open detection circuit
CN109254245B (en) * 2018-11-07 2020-12-01 紫光测控有限公司 Relay loop short circuit and open circuit detection circuit

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Application publication date: 20131016

RJ01 Rejection of invention patent application after publication