CN206685314U - A kind of relay with load faulty detection function - Google Patents

A kind of relay with load faulty detection function Download PDF

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Publication number
CN206685314U
CN206685314U CN201720390571.XU CN201720390571U CN206685314U CN 206685314 U CN206685314 U CN 206685314U CN 201720390571 U CN201720390571 U CN 201720390571U CN 206685314 U CN206685314 U CN 206685314U
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CN
China
Prior art keywords
relay
output
detection
input
control unit
Prior art date
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Expired - Fee Related
Application number
CN201720390571.XU
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Chinese (zh)
Inventor
陈宇果
周慧勤
陈培可
李敬斌
阮昆
曹桐军
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 Jianghuai Automobile Group Corp
Original Assignee
Anhui Jianghuai Automobile Group Corp
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Priority to CN201720390571.XU priority Critical patent/CN206685314U/en
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Publication of CN206685314U publication Critical patent/CN206685314U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The utility model provides a kind of relay with load faulty detection function, and the relay includes:Coil-end, the normally opened terminals of input and the normally closed terminals of output, in addition to:Detection unit, control unit, detection resistance and triode.One end of detection resistance is connected with inputting the input of normally opened terminals and detection unit respectively, and the other end of detection resistance is connected with the incoming end at relay coil end, and the power input using tie point as relay.The input of described control unit is connected with the output end of the detection unit, and the first output end of described control unit is connected with the base stage of triode;The end that picks out at the colelctor electrode of triode and the relay coil end is connected, the low side control terminal of the emitter stage of triode as the relay.Power output end of the normally closed terminals of output of relay as relay.The load being connected with relay of the utility model energy pair carries out fault detect or alarm, improves the security of automobile electronic system.

Description

A kind of relay with load faulty detection function
Technical field
It the utility model is related to relay technical field, more particularly to a kind of relay with load faulty detection function Device.
Background technology
With the continuous progress of electronic technology, relay is more and more in the use of automation field, such as, in automobile Electronic system on using a large amount of relays realize automatically controlling for electronic equipment.The total class of relay is various, is used in automobile On common are light relay, AIR COND RLY Air Conditioner Relay, Wiper Relay etc..But the existing not faulty inspection of the relay used Brake, be connected with relay electronic apparatus damage, such as burn-down of electric motor or it is short-circuit when, relay still in work shape State, load faulty can not be detected or alarmed, easily cause automotive safety problem.
Utility model content
The utility model provides a kind of relay with load faulty detection function, solves in existing automobile electronic system The problem of relay used can not be detected or alarmed to load faulty, the security of automobile electronic system is improved, reduced The security risk of automobile.
To realize object above, the utility model provides following technical scheme:
A kind of relay with load faulty detection function, the relay include:Coil-end, the normally opened terminals of input With export normally closed terminals, in addition to:Detection unit, control unit, detection resistance and triode;
One end of the detection resistance inputs the defeated of normally opened terminals and the detection unit with the relay respectively Entering end to be connected, the other end of the detection resistance is connected with the incoming end at the relay coil end, and using tie point as institute State the power input of relay;
The input of described control unit is connected with the output end of the detection unit, the first output of described control unit End is connected with the base stage of the triode;The colelctor electrode of the triode is connected with the end that picks out at the relay coil end, institute State low side control terminal of the emitter stage as the relay of triode;
The relay exports power output end of the normally closed terminals as the relay;
Switch on power in the power input of the relay, and when the low side control terminal of the relay is low level, If the input terminal voltage of the detection unit is less than first threshold or exports failure more than Second Threshold, the detection unit Signal, after described control unit receives the fault-signal, control the triode to disconnect, connect so that the relay disconnects Connect, wherein, the Second Threshold is more than the first threshold.
Preferably, the relay also includes:Fault cues unit;
Described control unit also includes:Detection signal output end, the detection signal output end and the fault cues list Member is connected;
After described control unit receives the fault-signal, the detection signal output end output low level or high electricity It is flat, to control the fault cues unit to carry out fault cues.Preferably, the detection unit is microprocessor.
Preferably, the microprocessor is MAX4172ESA model chips.
Preferably, described control unit includes:Primary processor and voltage-stablizer;
The input of the voltage-stablizer is connected with the power input of the relay, the output end of the voltage-stablizer and institute The power end for stating primary processor is connected;
Input of the input of the primary processor as described control unit, the first output end of the primary processor As the first output end of described control unit, the second output end of the primary processor is second defeated as described control unit Go out end.
Preferably, the primary processor is the single-chip microcomputer of PIC16F1782 models.
Preferably, the voltage-stablizer is L78L05 models.
Preferably, the fault cues unit include it is following any one or more:Light emitting diode, display screen, voice Player.
The utility model provides a kind of relay with load faulty detection function, by caused by detection resistance both ends Voltage whether there is short circuit or open circuit to judge to load, and the relay for solving to use in existing automobile electronic system can not be to load The problem of failure is detected or alarmed, the security of automobile electronic system is improved, reduce the security risk of automobile.
Brief description of the drawings
In order to illustrate more clearly of specific embodiment of the utility model, below by embodiment it is required use it is attached Figure is briefly described.
Fig. 1:It is a kind of relay schematic diagram with load faulty alarm provided by the utility model;
Fig. 2:It is the relay circuit connection diagram that the utility model embodiment provides.
Reference
1 power input
2 power output ends
3 low side control terminals
4 detection signal output ends
R detection resistances
Q triodes
The incoming end of a coil-ends
B coil-ends pick out end
C inputs normally opened terminals
D exports normally closed terminals
Embodiment
In order that those skilled in the art more fully understand the scheme of the utility model embodiment, below in conjunction with the accompanying drawings and Embodiment is described in further detail to the utility model embodiment.
The problem of alarming load faulty is not present for the relay used in current automobile electronic system, this practicality is new Type provides a kind of relay with load faulty detection function, is to judge load by voltage caused by detection resistance both ends No short circuit or open circuit to be present, what the relay for solving to use in existing automobile electronic system can not be alarmed load faulty asks Topic, the security of automobile electronic system is improved, reduce the security risk of automobile.
As shown in figure 1, a kind of relay with load faulty alarm, the relay include:Coil-end, input are normally opened The terminals c and normally closed terminals d of output, in addition to:Detection unit, control unit, detection resistance R and triode Q.Detection resistance R one end is connected with the normally opened terminals c of input of the relay and the input of the detection unit respectively, detection resistance R The other end be connected with the incoming end a at the relay coil end, and the power input using tie point as the relay 1.The input of described control unit is connected with the output end of the detection unit, the first output end of described control unit and institute The base stage for stating triode Q is connected;The colelctor electrode of the triode Q is connected with the end that picks out at the relay coil end, and described three Low side control terminal 3 of the pole pipe Q emitter stage as the relay.The relay coil end picks out end b and triode Q's Colelctor electrode is connected, the low side control terminal 3 of triode Q emitter stage as the relay.The relay exports normally closed wiring Hold power output ends 2 of the d as the relay.Switch on power in the power input 1 of the relay, and the relay Low side control terminal 3 when being low level, if the input terminal voltage of the detection unit is less than first threshold or more than the second threshold Value, then the detection unit output fault-signal, after described control unit receives the fault-signal, controls the triode Q disconnects, so that the relay disconnects, wherein, the Second Threshold is more than the first threshold.
Specifically, in automobile electronic system, the power input of the relay is often connected with the positive pole of battery, in institute When to state the low side control terminal 3 of relay be low level, the relay conducting battery positive voltage and the energization of load, if load hair Raw short circuit, then voltage drop increases on detection resistance R, the input terminal voltage of detection unit is more than the second threshold values, the control is single The fault-signal of first output loading short circuit;If load generation open circuit, the voltage drop on detection resistance R is small, makes detection unit Input terminal voltage be less than first threshold, the fault-signal of described control unit output loading open circuit.It should be noted that failure Signal can be low level or high level or PWM ripples.
Further, the relay also includes:Fault cues unit (is not shown) on figure.Described control unit also includes: Detection signal output end 4, the detection signal output end are connected with the fault cues unit.Received in described control unit After the fault-signal, the detection signal output end output low level or high level, to control the fault cues unit to enter Row fault cues.
It should be noted that the detection signal output end of relay can be connected with vehicle-mounted instrument and meter, in relay When detecting load faulty, instrument and meter can show fault message.
In actual applications, the detection unit can be microprocessor, and the microprocessor is frequently with MAX4172ESA types Number chip.In load short circuits, MAX4172ESA chips determine detection resistance R voltage drop according to the electric current of collection, are examined The input terminal voltage of unit is surveyed, and by it compared with the voltage reference that the chip is set, if the input of detection unit Voltage is more than Second Threshold, then the chip exports low level signal to described control unit.Similarly, during load cut-off, if inspection The input terminal voltage for surveying unit is less than first threshold, then MAX4172ESA chips export low level signal to described control unit.
Described control unit includes:Primary processor and voltage-stablizer.The electricity of the input of the voltage-stablizer and the relay Source input is connected, and the output end of the voltage-stablizer is connected with the power end of the primary processor.The input of the primary processor The input as described control unit is held, the first output end of the primary processor exports as the first of described control unit End, the second output end of the second output end of the primary processor as described control unit.
Specifically, the primary processor can be the single-chip microcomputer of PIC16F1782 models.The voltage-stablizer can use L78L05 Model.Receive the fault-signal of detection unit output in primary processor, the second output end of the single-chip microcomputer for high level or Low level, the detection signal output end of the relay is set to export high level or low level.
The fault cues unit include it is following any one or more:Light emitting diode, display screen, speech player.
Specifically, when the fault cues unit is light emitting diode, the input of the light emitting diode with it is described 3rd output end of control unit is connected, and is less than the first threshold or more than institute in the detection electric current that the detection unit obtains When stating the second threshold values, the 3rd output end of described control unit is high level, the lumination of light emitting diode is alarmed.
When the fault cues unit is display screen, the input of the display screen and the 4th of described control unit the defeated Go out end to be connected, the fault message of display is preset in the primary processor of described control unit, its fault message and detection unit Input terminal voltage corresponds, when the input terminal voltage of the detection unit is less than the first threshold, the display screen display Show load cut-off failure, when the input terminal voltage is more than the Second Threshold, the display screen shows load cut-off failure.
Similarly, when the trouble unit is speech player, the input of the speech player and the control 5th output end of unit is connected, and the fault message played, its fault message are preset in the primary processor of described control unit Corresponded with the input terminal voltage of detection unit, be less than the first threshold or big in the input terminal voltage of the detection unit When the Second Threshold, the speech player reports fault message.
It can be seen that the utility model provides a kind of relay with load faulty detection function, pass through detection resistance both ends Caused voltage whether there is short circuit or open circuit to judge to load, and the relay for solving to use in existing automobile electronic system can not The problem of alarming load faulty, the security of automobile electronic system is improved, reduce the security risk of automobile.
Construction, feature and action effect of the present utility model is described in detail according to diagrammatically shown embodiment above, with Upper described is only preferred embodiment of the present utility model, but the utility model is to limit practical range shown in drawing, it is every according to According to the made change of conception of the present utility model, or the equivalent embodiment of equivalent variations is revised as, still without departing from specification and figure , all should be in the scope of protection of the utility model when showing covered spirit.

Claims (8)

1. a kind of relay with load faulty detection function, the relay include:Coil-end, the normally opened terminals of input and Export normally closed terminals, it is characterised in that also include:Detection unit, control unit, detection resistance and triode;
One end of detection resistance input for inputting normally opened terminals and the detection unit with the relay respectively Be connected, the other end of the detection resistance is connected with the incoming end at the relay coil end, and using tie point as described in after The power input of electrical equipment;
The input of described control unit is connected with the output end of the detection unit, the first output end of described control unit with The base stage of the triode is connected;The colelctor electrode of the triode is connected with the end that picks out at the relay coil end, and described three Low side control terminal of the emitter stage of pole pipe as the relay;
The relay exports power output end of the normally closed terminals as the relay;
Switch on power in the power input of the relay, and when the low side control terminal of the relay is low level, if The input terminal voltage of the detection unit is less than first threshold or more than Second Threshold, then the detection unit output failure letter Number, after described control unit receives the fault-signal, control the triode to disconnect, connect so that the relay disconnects Connect, wherein, the Second Threshold is more than the first threshold.
2. relay according to claim 1, it is characterised in that the relay also includes:Fault cues unit;
Described control unit also includes:Detection signal output end, the detection signal output end and the fault cues unit phase Even;
After described control unit receives the fault-signal, the detection signal output end output low level or high level, To control the fault cues unit to carry out fault cues.
3. relay according to claim 2, it is characterised in that the detection unit is microprocessor.
4. relay according to claim 3, it is characterised in that the microprocessor is MAX4172ESA model chips.
5. relay according to claim 4, it is characterised in that described control unit includes:Primary processor and voltage-stablizer;
The input of the voltage-stablizer is connected with the power input of the relay, the output end of the voltage-stablizer and the master The power end of processor is connected;
Input of the input of the primary processor as described control unit, the first output end conduct of the primary processor First output end of described control unit, the second output end of the primary processor export as the second of described control unit End.
6. relay according to claim 5, it is characterised in that the primary processor is the monolithic of PIC16F1782 models Machine.
7. relay according to claim 6, it is characterised in that the voltage-stablizer is L78L05 models.
8. according to the relay described in any one of claim 2 to 7, it is characterised in that the fault cues unit includes following Any one or more:Light emitting diode, display screen, speech player.
CN201720390571.XU 2017-04-13 2017-04-13 A kind of relay with load faulty detection function Expired - Fee Related CN206685314U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201720390571.XU CN206685314U (en) 2017-04-13 2017-04-13 A kind of relay with load faulty detection function

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201720390571.XU CN206685314U (en) 2017-04-13 2017-04-13 A kind of relay with load faulty detection function

Publications (1)

Publication Number Publication Date
CN206685314U true CN206685314U (en) 2017-11-28

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108933425A (en) * 2018-07-27 2018-12-04 苏州浪潮智能软件有限公司 A kind of protection circuit, protection system and guard method
CN109859988A (en) * 2017-11-30 2019-06-07 株洲中车时代电气股份有限公司 A kind of control relay circuit

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109859988A (en) * 2017-11-30 2019-06-07 株洲中车时代电气股份有限公司 A kind of control relay circuit
CN109859988B (en) * 2017-11-30 2020-05-08 株洲中车时代电气股份有限公司 Relay control circuit
CN108933425A (en) * 2018-07-27 2018-12-04 苏州浪潮智能软件有限公司 A kind of protection circuit, protection system and guard method

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CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20171128

Termination date: 20200413

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