CN207051445U - A kind of relay fault detecting circuit and the relay with the circuit - Google Patents
A kind of relay fault detecting circuit and the relay with the circuit Download PDFInfo
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- CN207051445U CN207051445U CN201720507109.3U CN201720507109U CN207051445U CN 207051445 U CN207051445 U CN 207051445U CN 201720507109 U CN201720507109 U CN 201720507109U CN 207051445 U CN207051445 U CN 207051445U
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Abstract
The utility model discloses a kind of relay fault detecting circuit and with the circuit relay, including contact voltage drop detection means and signal output apparatus, contact voltage drop detection means detects relay contact both ends pressure drop, when judging that relay contact both ends have malfunction, signal output apparatus output fault-signal prompting judges that relay is faulty or fails；The contact voltage drop detection means includes comparison circuit and photo-coupler, and photo-coupler detection obtains relay contact both ends contact voltage drop signal, and it is off-state that relay contact is illustrated when detecting that there is pressure drop at relay contact both ends；Optocoupler output inputs contact voltage drop signal to comparison circuit, after contact voltage drop detection means obtains contact voltage drop signal, will detect the breakdown judge signal output obtained into signal output apparatus, judges to prompt relay to be in trouble or failure state.System failure point position can quickly be judged, fault detection efficiency is high, and breakdown loss is low.
Description
Technical field
A kind of relay is the utility model is related to, relay contact malfunction detected more particularly, to a kind of
Relay.
Background technology
Relay is a kind of conventional electric control device, it be when the change of input energizing quantity reach regulation requirement when,
Make controlled volume that a kind of electrical equipment of predetermined Spline smoothing occur in electric output circuit.It has control system or input circuit
And by the interactive relationship between control system or output loop.It is commonly used in the control circuit of automation, relay exists
It is often used as going to control one kind " automatic switch " of high current running by low current in actual circuit, and is widely used in crowd
More occasions, play in circuit automatically adjust, safeguard protection, the effect such as change-over circuit.Because relay is with isolation features
Automatic switch element, therefore be widely used in remote control, remote measurement, communicate, automatically control, electromechanical integration, power electronics are set
It is one of most important control element in standby and Vehicle Electronic Control element, existing relay species is various, such as electromagnetism relay
Device, optical relay etc.；Wherein relay element has also been used in automobile manufacture, it is therefore an objective to for entering to vehicle mounted electrical apparatus
Row is effectively protected and controlled；But existing AUTOMOTIVE RELAY is detected and tested to relay contact break-make only before dispatching from the factory
Examine, and relay is not possess self detection on off operating mode and malfunction in itself, and this without suspected of relay in conduct
After the input actual use of electric control device, self the detection break-make and malfunction of itself are difficult to realize, both easily triggers electricity
Road failure occurs, and there is when control circuit breaks down, it is impossible to trouble point position is quick and precisely judged, to electricity
Road fault detect brings delay, is unfavorable for the maintenance of whole control system.
The content of the invention
The utility model does not possess self detection on off operating mode and malfunction there is itself to solve existing relay
The defects of, cause both easy detonator circuit failure appearance, and there is when control circuit breaks down, it is impossible to quick and precisely sentence
A disconnected position of being out of order, is delayed to fault detection band, is unfavorable for the present situations such as the maintenance of whole control system and carries
One kind of confession can in time judge that control system trouble point institute is in place with effective detection relay contact both ends on off operating mode
Put, improve the relay fault detecting circuit of fault detection efficiency and the relay with the circuit.
The utility model is that concrete technical scheme is used by solving above-mentioned technical problem：A kind of relay fault detect
Circuit, it is characterised in that：Including contact voltage drop detection means and signal output apparatus, contact voltage drop detection means detection relay
The pressure drop of contact both ends, when the detection of contact voltage drop detection means judges that relay contact both ends have malfunction, signal output electricity
Output fault-signal prompting in road judges that relay is in trouble or failure state；The contact voltage drop detection means includes more electric
Road and photo-coupler, photo-coupler detection obtain the contact voltage drop signal at relay contact both ends, when detecting relay contact
Both ends illustrate that relay contact is off when having pressure drop；Optocoupler output is believed to comparison circuit input contact voltage drop
Number, after contact voltage drop detection means obtains contact voltage drop signal, by the breakdown judge signal output that detection obtains to signal output
In circuit, judge to prompt relay to be in trouble or failure state.Relay carries self detection on off operating mode and failure in itself
Status function, effectively automatic detection it can go out the on off operating mode at relay contact both ends, can in control system failure state
It is quick to judge system failure point position in time, fault detection efficiency is improved, more utilizes the inspection of whole control system
Repair and safeguard, reduce many-sided loss that barrier for some reason is brought.
Preferably, described comparison circuit includes direct current power source voltage, second resistance, 3rd resistor, the 4th resistance, the
Seven resistance and voltage comparator, voltage comparator use voltage comparator of the chip model for LM393, the comparison of voltage comparator
The level output end of input IN+ pins and photo-coupler is electrically connected, second resistance and 3rd resistor series connection after with direct current
Source voltage is in parallel electrical connection, and the comparison that what second resistance and 3rd resistor were in series be connected in series a little with voltage comparator inputs
End IN- pins are electrically connected, and comparison output end and the signal output apparatus of voltage comparator, which are electrically connected to export, judges that prompting is touched
Point both ends on off operating mode；Direct current power source voltage positive terminal, light are accessed after the level output end of photo-coupler and the 4th resistant series
Another output end of coupler is with accessing direct current power source voltage negative pole end after the 7th resistant series；Detected and obtained by photo-coupler
The contact voltage drop signal at relay contact both ends, illustrate that relay contact is in when detecting that there is pressure drop at relay contact both ends
Off-state, and exported and prompted by signal output apparatus；Illustrate relay when detecting that the pressure drop of relay contact both ends is zero
Device contact both ends are in closure state.Effective automatic detection goes out the on off operating mode at relay contact both ends, occurs in control system
During malfunction, system failure point position can be quickly judged in time, improves fault detection efficiency, more using whole
The maintenance and maintenance of control system, reduce many-sided loss that barrier for some reason is brought.
Preferably, also include the coil pressure drop detection means and a ratio of a detection relay coil both ends electric signal
Compared with judging that relay is in normal or failure state multilevel iudge device, it is provided with the contact voltage drop detection means more electric
Road and signal output apparatus, voltage comparator and photo-coupler, comparison circuit detection relay contact pressure are provided with comparison circuit
The on off operating mode at both ends is dropped, and the voltage ratio that on off operating mode is converted into contact voltage drop signal input comparison circuit is relatively held；It is logical
The contact voltage drop at photo-coupler detection relay contact both ends is crossed, when detecting that relay contact both ends have pressure drop to illustrate relay
Contact is off, and is exported and prompted by signal output apparatus；Multilevel iudge circuit, line are provided with multilevel iudge device
The coil pressure drop signal at ring signal detection means detection read coil both ends, detection obtain the coil pressure drop signal at coil both ends with
The contact voltage drop signal that contact voltage drop detection means obtains contact both ends inputs to the multilevel iudge in multilevel iudge device jointly
Circuit is compared, and is compared and is judged whether contact is in closure state and judges relay whether in normal or failure shape
State.The pressure drop at relay contact both ends is detected by photo-coupler, has pressure drop to illustrate that contact is off, pressure drop be zero or
It is almost equal to zero, illustrates that contact is in closure state；Pass through the electricity at the XOR gate read coil both ends in multilevel iudge device simultaneously
Signal, it is compared and judges whether contact is in closure state and judges relay whether in normal or failure state.Effectively
Automatic detection goes out the on off operating mode at relay contact both ends, in control system failure state, quickly can judge in time
System failure point position, improve fault detection efficiency, more using the maintenance and maintenance of whole control system, reduce because
Many-sided loss that failure is brought.
Preferably, also include one detection the end-coil pressure drop signal of relay coil two coil signal detection means,
One multilevel iudge relay is in normal or failure state multilevel iudge device, and the contact voltage drop detection means detection obtains
The contact voltage drop signal at relay contact both ends is obtained, the coil signal detection means detection obtains the line at relay coil both ends
Pressure drop signal is enclosed, contact voltage drop signal by multilevel iudge device with coil pressure drop signal input multilevel iudge device, being compared
Compared with whether judging relay in normal or failure state, and detected by signal output apparatus obtain relay it is whether normal or
Failure state.The pressure drop at contact both ends is detected by contact voltage drop detection means, passes through coil signal detection means detection coil
The pressure drop at both ends, and detect obtained signal to two and be analyzed, judge relay whether in normal or failure shape
State.Effective automatic detection goes out the on off operating mode at relay contact both ends, can be quickly timely in control system failure state
Judge system failure point position, improve fault detection efficiency, more using the maintenance and maintenance of whole control system,
Reduce many-sided loss that barrier for some reason is brought.
Preferably, described photo-coupler uses photo-coupler of the chip model for P521, the input of photo-coupler
It is in series by first resistor and relay contact both ends and is joined together to form the input circuit of photo-coupler；Photo-coupler
Level output end is electrically connected with voltage comparator input, another output end of photo-coupler and the earth polar phase in comparison circuit
Electrical connection, form the output loop of photo-coupler.Improving can to the contact voltage drop signal detection collection stabilization of contact both ends pressure drop
By property.
Preferably, direct current power source voltage, the 12nd resistance, the 13rd resistance, the tenth are provided with described comparison circuit
Resistance, the 16th resistance and voltage comparator, voltage comparator use voltage comparator of the chip model for LM393, voltage ratio
The first level output end for comparing input IN+ pins and photo-coupler compared with device is electrically connected, the 12nd resistance and the 13rd
Be in parallel and be connected with direct current power source voltage after resistant series, what the 12nd resistance and the 13rd resistance were in series be connected in series a little with
The first of voltage comparator compares input IN- pins and is electrically connected, comparison output end and the signal output electricity of voltage comparator
Road, which is electrically connected, exports prompting contact both ends on off operating mode；Accessed after the level output end of photo-coupler and the tenth resistant series straight
Supply voltage positive terminal is flowed, another output end of photo-coupler is with accessing direct current power source voltage negative pole after the 16th resistant series
End.It is simple and reliable to detect circuit structure.
Preferably, described coil signal detection means uses NOR gate circuit of the chip model for 74h086, relay
Device coil both ends are parallel with the 8th resistance and the 9th resistance, and the series connection node after the 8th resistance and the 9th resistant series is inputted to different
Second in OR circuit compares input IN+ pins, and the level output end and voltage comparator input of photo-coupler are mutually electric
Connection, another output end of photo-coupler input IN- pins compared with second in NOR gate circuit are electrically connected, by different
The coil pressure drop signal at OR gate read coil both ends, and the judgement relay contact compared with the contact voltage drop letter at contact both ends
Whether it is in closure state and judges relay whether in normal or failure state.It is simple and reliable to detect circuit structure.
Preferably, described signal output apparatus is using LED instruction output circuits or the instruction output of honey device；LED
Indicate output circuit using the 14th resistance and the 2nd LED light emitting diodes being connected in series, the 14th resistance one end and voltage
Comparator output terminal is electrically connected, and the other end is electrically connected with the 2nd LED light-emitting diodes tube anodes, the 2nd LED light emitting diodes
Negative electrode is electrically connected with power cathode；NOR gate circuit output end, which is provided with, judges signal output apparatus, judges signal output apparatus
Output circuit or the instruction output of honey device are judged using LED instructions；LED instructions judge that output circuit use is connected in series
15 resistance and the 3rd LED light emitting diodes, the 15th resistance one end are electrically connected with NOR gate circuit output end, the other end with
3rd LED light-emitting diodes tube anodes are electrically connected, and the 3rd LED light-emitting diodes tube cathode is electrically connected with power cathode.It is easy to make
User or guardian quickly judge the break-make or malfunction that relay contact both ends occur.
Preferably, described contact voltage drop detection means includes photo-coupler, the input of photo-coupler passes through first
Resistance is in series with relay contact both ends and is joined together to form the input circuit of photoelectrical coupler；The level of photo-coupler is defeated
Go out end with accessing direct current power source voltage positive terminal, another output end of photo-coupler and the 14th electricity after the 19th resistant series
Direct current power source voltage negative pole end is accessed after resistance series connection, forms the output loop of photo-coupler, while another output of photo-coupler
In end input multilevel iudge device, the coil pressure drop signal with being obtained in multilevel iudge device from the second photo-coupler is compared
Compared with judgement, judge relay whether in normal or failure state；Coil signal detection means includes the second photo-coupler, and second
The input both ends of photo-coupler are in parallel after series resistance with relay coil both ends are joined together to form the second photoelectricity respectively
The input circuit of coupler；The output both ends of second photo-coupler are in parallel after series resistance with direct current power source voltage both ends respectively
It is joined together to form the output loop of the second photo-coupler, level output end the 11st resistance of series connection of the second photo-coupler
It is connected afterwards with DC voltage positive polarity, while another output end of the second photo-coupler is inputted into multilevel iudge device,
Judge compared with the contact voltage drop signal obtained in multilevel iudge device from photo-coupler, judge whether relay is in
Normal or failure state.The pressure drop at contact both ends is detected by a photo-coupler, passes through another photo-coupler detection coil
The pressure drop at both ends, and the signal of two photo-coupler detections is analyzed, judge relay whether in normal or mistake
Effect state.Effective automatic detection goes out the on off operating mode at relay contact both ends, can be quick in control system failure state
Judge system failure point position in time, improve fault detection efficiency, more using whole control system maintenance with
Safeguard, reduce many-sided loss that barrier for some reason is brought.
Another goal of the invention of the present utility model is to provide a kind of relay, including relay package shell, relay
Device coil and relay contact, it is characterised in that：Also include above-mentioned technical proposal described in one of relay fault detecting circuit,
Shape together with relay package shell, relay coil, relay contact and the common assembly and connection of relay fault detecting circuit
The integrated relay finished product connect.Effective automatic detection goes out the on off operating mode at relay contact both ends, occurs in control system
During malfunction, system failure point position can be quickly judged in time, improves fault detection efficiency, more using whole
The maintenance and maintenance of control system, reduce many-sided loss that barrier for some reason is brought.
The beneficial effects of the utility model are：The pressure drop at relay contact both ends is detected by photo-coupler, has pressure drop to say
Bright contact is off, and pressure drop is zero or is almost equal to zero, and illustrates that contact is in closure state；Pass through multilevel iudge simultaneously
The electric signal at the XOR gate read coil both ends in device, it is compared and judges whether contact is in closure state and judges relay
Whether device is in normal or failure state.The pressure drop at contact both ends is either detected by a photo-coupler, passes through another
The pressure drop at photo-coupler detection coil both ends, and the signal of two photo-coupler detections is analyzed, judge relay
Whether in normal or failure state.Relay carries self detection on off operating mode and malfunction function in itself, can effectively certainly
The dynamic on off operating mode for detecting relay contact both ends, in control system failure state, quickly can judge in time be
System trouble point position, improves fault detection efficiency, more using the maintenance and maintenance of whole control system, reduces for some reason
Hinder the many-sided loss brought.
Brief description of the drawings：
The utility model is described in further detail with reference to the accompanying drawings and detailed description.
Fig. 1 is a kind of theory diagram structural representation of relay fault detecting circuit of the utility model.
Fig. 2 is that a kind of relay fault detecting circuit of the utility model and the relay circuit principle with the circuit are illustrated
Figure；
Fig. 3 is that the utility model another kind relay fault detecting circuit and the relay circuit principle with the circuit are shown
It is intended to；
Fig. 4 is that another relay fault detecting circuit of the utility model and the relay circuit principle with the circuit are shown
It is intended to.
Embodiment
Embodiment 1：
In embodiment shown in Fig. 1, Fig. 2, a kind of relay fault detecting circuit, including the He of contact voltage drop detection means 10
Signal output apparatus 40, contact voltage drop detection means 10 detect relay contact CD both ends pressure drops, contact voltage drop detection means 10
When detection judges that relay contact CD both ends have malfunction, signal output apparatus exports the prompting of 40 fault-signals and judges relay
Device is in trouble or failure state；The contact voltage drop detection means includes comparison circuit 11 and photo-coupler IC1, photo-coupler
IC detections obtain the contact voltage drop signal at relay contact both ends, illustrate relay when detecting that there is pressure drop at relay contact both ends
Device contact is off；The defeated IC1 of photo-coupler goes out end and inputs contact voltage drop signal, contact voltage drop detection to comparison circuit 11
After device obtains contact voltage drop signal, the breakdown judge signal output obtained will be detected into signal output apparatus, judge to prompt
Relay is in trouble or failure state.Comparison circuit 11 includes direct current power source voltage 12V/24V, second resistance R2, the 3rd electricity
Resistance R3, the 4th resistance R4, the 7th resistance R7 and voltage comparator, voltage comparator use voltage ratio of the chip model for LM393
Compared with device IC2, the comparison input IN+ pins of voltage comparator ic 2 and the level output end E of photo-coupler are electrically connected, and second
It is in parallel and electrically connects with direct current power source voltage after resistance R2 and 3rd resistor R3 series connection, second resistance R2 goes here and there with 3rd resistor R3 phases
Connection be connected in series point F and the comparison input IN- pins of voltage comparator are electrically connected, the comparison output end of voltage comparator
It is electrically connected to export with signal output apparatus and judges prompting contact both ends on off operating mode；The level output end E of photo-coupler and
Direct current power source voltage positive terminal is accessed after four resistance R4 series connection, another output end of photo-coupler is connected with the 7th resistance R7 to be followed by
Enter direct current power source voltage negative pole end；The contact voltage drop signal for obtaining relay contact both ends is detected by photo-coupler, works as detection
Go out relay contact both ends and illustrate that relay contact is off when having pressure drop, and carried by signal output apparatus output
Show；Illustrate that relay contact both ends are in when being either almost equal to zero when detecting that relay contact CD both ends pressure drops are zero to close
Conjunction state.Photo-coupler IC1 uses photo-coupler of the chip model for P521, and the input of photo-coupler passes through first resistor R1
It is in series with relay contact CD both ends and is joined together to form the input circuit of photoelectrical coupler；The level output of photo-coupler
End E is electrically connected with voltage comparator input, and another output end and the earth polar in comparison circuit of photo-coupler are electrically connected,
Form the output loop of photo-coupler.Signal output apparatus 40 is using LED instruction output circuits or the instruction output of honey device.
LED instruction output circuits 40 are using the 6th resistance R6 and the first LED LEDs 1 that are connected in series, the 6th resistance R6 mono-
End is electrically connected with voltage comparator output end, and the other end is electrically connected with the anode of LED LEDs 1, LED luminous two
Pole pipe negative electrode is electrically connected with direct current power source voltage negative pole.Direct current power source voltage uses power supply on vehicle DC voltage.
Embodiment 2：
In embodiment shown in Fig. 1, Fig. 3, include the coil pressure drop inspection of a detection relay coil both ends electric signal
Survey device 10 and a multilevel iudge relay is in normal or failure state multilevel iudge device 30, the contact voltage drop inspection
Survey in device and be provided with comparison circuit 10 and signal output apparatus 40, voltage comparator and photo-coupler IC1 are provided with comparison circuit,
The on off operating mode at comparison circuit detection relay contact CD both ends, and on off operating mode is converted into the input of contact voltage drop signal and compared
Voltage ratio in circuit is relatively held；The contact voltage drop at relay contact both ends is detected by photo-coupler IC1, when detecting relay
Contact both ends have pressure drop to illustrate that relay contact is off, and are exported and prompted by signal output apparatus；Multilevel iudge
Multilevel iudge circuit 31, the coil pressure drop letter at the coil signal detection means detection read coil AB both ends are provided with device 30
Number, detection obtains the coil pressure drop signal and the contact voltage drop signal at contact voltage drop detection means acquisition contact both ends at coil both ends
30 multilevel iudge circuit 31 is inputted into multilevel iudge device jointly to be compared, and is compared and is judged contact whether in closing
Whether conjunction state simultaneously judges relay in normal or failure state.Direct current power source voltage 12V/24V, the are provided with comparison circuit
12 resistance R12, the 13rd resistance R13, the tenth resistance R10, the 16th resistance R16 and voltage comparator, voltage comparator ic 3
Voltage comparator of the chip model for LM393 is used, the first of voltage comparator ic 3 compares input IN+ pins and optical coupling
The level output end of device is electrically connected, and is in parallel after the 12nd resistance R12 and the 13rd resistance R13 series connection with direct current power source voltage
What connection, the 12nd resistance R12 and the 13rd resistance R13 were in series is connected in series a little compared with the first of voltage comparator ic 3
Input IN- pins are electrically connected, and the output that is electrically connected of comparison output end and the signal output apparatus 40 of voltage comparator ic 3 carries
Show contact both ends on off operating mode；The level output end G of photo-coupler is accessing direct current power source voltage just after being connected with the tenth resistance R10
Extremely, direct current power source voltage negative pole end is accessed after another output end of photo-coupler is connected with the 16th resistance R16.Coil signal
Detection means uses chip model the NOR gate circuit IC4 for 74h086, NOR gate circuit IC4 to form multilevel iudge circuit 31
Main circuit.Relay coil both ends are parallel with the 8th resistance R8 and the 9th resistance R9, the 8th resistance R8 and the 9th resistance R9 string
What the series connection node after connection was inputted into NOR gate circuit IC4 second compares input IN+ pins, photo-coupler IC1 level
Output end is electrically connected with voltage comparator input, another output end H of photo-coupler and the second ratio in NOR gate circuit
Be electrically connected compared with input IN- pins, by the coil pressure drop signal at XOR gate read coil AB both ends, and with contact both ends
Contact voltage drop letter, which is compared, judges whether relay contact is in closure state and judges relay whether in normal or mistake
Effect state.Signal output apparatus 40 is using LED instruction output circuits or the instruction output of honey device；LED instruction output circuits are adopted
With the 14th resistance R14 being connected in series and the 2nd LED LEDs 2, the 14th resistance R14 one end and voltage ratio compared with
Device IC3 output ends are electrically connected, and the other end is electrically connected with the 2nd LED light-emitting diodes tube anodes LED2, the 2nd LED light-emitting diodes
Tube cathode is electrically connected with power cathode；NOR gate circuit output end is electrically connected with judgement signal output apparatus, judges that signal is defeated
Go out circuit and output circuit or the instruction output of honey device are judged using LED instructions；LED instructions judge that output circuit is connected using series connection
The 15th resistance R15 connect and the 3rd LED light emitting diodes, the 15th resistance R15 one end and NOR gate circuit IC4 output end phases
Electrical connection, the other end are electrically connected with the 3rd LED light-emitting diodes tube anodes LED3, the 3rd LED light-emitting diodes tube cathode and power supply
Negative pole is electrically connected.It is electrically coupled in series between NOR gate circuit IC4 output ends and the 15th resistance R15 to have a NOT gate.XOR gate electricity
Road IC4 accesses direct current power source voltage by three terminal regulator IC41, and three terminal regulator IC41 uses model L7805 voltage stabilizing core
Piece.The other the same as in Example 1 is identical.
Embodiment 3：
In embodiment shown in Fig. 1, Fig. 4, include the coil of a detection end-coil pressure drop signal of relay coil two
20, multilevel iudge relays of signal supervisory instrument are in normal or failure state multilevel iudge device 30, the contact
The detection of pressure drop detection means 10 obtains the contact voltage drop signal at relay contact both ends, and the coil signal detection means 20 detects
Obtain the coil pressure drop signal at relay coil both ends, contact voltage drop signal and coil pressure drop signal input multilevel iudge device 30
Judgement comparison circuit 32 in, be compared by multilevel iudge device and whether judge relay in normal or failure state, and
Detected by signal output apparatus and obtain whether relay normal or failure state.Judgement in multilevel iudge device 30 is more electric
Road 32 includes using chip model as LM393 second voltage comparator IC5 and uses chip model as the second different of 74h086
OR circuit IC6.The 10th resistance R20 of the common series connection of second voltage comparator IC5 and the second NOR gate circuit IC6 power end
Direct current power source voltage 12V/24V is accessed afterwards.Second NOR gate circuit IC6 output end access second voltage comparator IC5 ratio
Compared with judging input.Contact voltage drop detection means includes photo-coupler IC1, the input of photo-coupler by first resistor R1 with
Relay contact both ends, which are in series, is joined together to form the input circuit of photo-coupler；The level output end G of photo-coupler with
Direct current power source voltage 12V/24V positive terminals, photo-coupler CI1 another output end H and the are accessed after 19th resistance R19 series connection
Direct current power source voltage negative pole end is accessed after 14 resistance R24 series connection, forms the output loop of photo-coupler, while photo-coupler
Another output end input multilevel iudge device 30 judgement comparison circuit 32 in, with multilevel iudge device from the second optical coupling
Whether the coil pressure drop signal that device IC7 is obtained is compared judgement, judge relay in normal or failure state；Coil is believed
Number detection means includes the second photo-coupler IC7, after the input both ends difference series resistance of the second photo-coupler with relay line
Circle AB both ends, which are in parallel, is joined together to form the second photoelectrical coupler IC7 input circuit；The two of second photo-coupler IC7 are defeated
Go out end and be in parallel with direct current power source voltage 12V/24V both ends after series resistance respectively to be joined together to form the second photo-coupler
Output loop, the level output end of the second photo-coupler are connected after the 11st resistance R21 with DC voltage voltage 12V/24V just
Pole is connected, while another output end F of the second photo-coupler is inputted into the judgement comparison circuit 32 of multilevel iudge device 30,
Judge compared with the contact voltage drop signal obtained in multilevel iudge device from photo-coupler, judge whether relay is in
Normal or failure state.Judge that signal output apparatus judges output circuit or the instruction output of honey device using LED instructions；LED
Indicate to judge output circuit use the 13rd resistance R23 and the 4th LED LEDs 4 that are connected in series, the 13rd
Resistance R23 one end is electrically connected with NOR gate circuit IC4 output ends, the other end and the 3rd LED light-emitting diodes tube anode LED3 phases
Electrical connection, the 3rd LED light-emitting diodes tube cathode are electrically connected with power cathode.The other the same as in Example 1 is identical.
Embodiment 4：
In embodiment shown in Fig. 1, Fig. 2, a kind of relay, including relay package shell, relay coil and relay
Device contact, in addition to the relay fault detecting circuit described in embodiment 1, relay package shell, relay coil AB, relay
The relay K finished products that integral type connects are formed together with device contact CD and the common assembly and connection of relay fault detecting circuit.Relay
When device K works, C contacts and D contacts Liang Ge contacts are used to control band dynamic load R work.Detect the inspection of relay malfunction
Slowdown monitoring circuit is located in the package cavity that relay package shell is surrounded.Can certainly be by the inspection of detection relay malfunction
Slowdown monitoring circuit is located at relay package outer shell outer wall, and fixed test relay malfunction is provided with relay package outer shell outer wall
Detection circuit fixed mount, detection relay malfunction detection circuit fixed by fixed mount and relay package shell
Form the mounting connection structure of integral type.
Embodiment 5：
In embodiment shown in Fig. 1, Fig. 3, a kind of relay, including relay package shell, relay coil and relay
Device contact, in addition to the relay fault detecting circuit described in embodiment 2, relay package shell, relay coil, relay
The relay K finished products that integral type connects are formed together with contact and the common assembly and connection of relay fault detecting circuit.Relay K works
When making, C contacts and D contacts Liang Ge contacts are used to control band dynamic load R work.Detect the detection circuit of relay malfunction
It is located in the package cavity that relay package shell is surrounded.Can certainly be by the detection circuit of detection relay malfunction
It is located at relay package outer shell outer wall, the detection of fixed test relay malfunction is provided with relay package outer shell outer wall
The fixed mount of circuit, the detection circuit for detecting relay malfunction are fixed to form one by fixed mount and relay package shell
The mounting connection structure of body formula.
Embodiment 6：
In embodiment shown in Fig. 1, Fig. 4, a kind of relay, including relay package shell, relay coil and relay
Device contact, in addition to the relay fault detecting circuit described in embodiment 3, relay package shell, relay coil, relay
The relay K finished products that integral type connects are formed together with contact and the common assembly and connection of relay fault detecting circuit.Relay K works
When making, C contacts and D contacts Liang Ge contacts are used to control band dynamic load R work.Detect the detection circuit of relay malfunction
It is located in the package cavity that relay package shell is surrounded.Can certainly be by the detection circuit of detection relay malfunction
It is located at relay package outer shell outer wall, the detection of fixed test relay malfunction is provided with relay package outer shell outer wall
The fixed mount of circuit, the detection circuit for detecting relay malfunction are fixed to form one by fixed mount and relay package shell
The mounting connection structure of body formula.
Above content and structure describes the general principle of the utility model product, principal character and of the present utility model excellent
Point, it should be understood by those skilled in the art that.Simply illustrate principle of the present utility model described in examples detailed above and specification,
On the premise of the spirit and scope of the utility model is not departed from, the utility model also has various changes and modifications, these changes
Belonged to improving within claimed the scope of the utility model.The utility model requires protection scope will by appended right
Ask book and its equivalent thereof.
Claims (10)
- A kind of 1. relay fault detecting circuit, it is characterised in that：Including contact voltage drop detection means and signal output apparatus, touch Point pressure drop detection means detection relay contact both ends pressure drop, the detection of contact voltage drop detection means judge that relay contact both ends are deposited When nonserviceabling, signal output apparatus output fault-signal prompting judges that relay is in trouble or failure state；It is described to touch Point pressure drop detection means include comparison circuit and photo-coupler, and photo-coupler detection obtains the contact voltage drop at relay contact both ends Signal, illustrate that relay contact is off when detecting that there is pressure drop at relay contact both ends；Optocoupler output Contact voltage drop signal is inputted to comparison circuit, after contact voltage drop detection means obtains contact voltage drop signal, the event obtained will be detected Barrier judges signal output into signal output apparatus, judges to prompt relay to be in trouble or failure state.
- 2. according to the relay fault detecting circuit described in claim 1, it is characterised in that：Described comparison circuit includes direct current Supply voltage, second resistance, 3rd resistor, the 4th resistance, the 7th resistance and voltage comparator, voltage comparator is using chip-shaped The level output end of number voltage comparator for being LM393, the comparison input IN+ pins of voltage comparator and photo-coupler mutually electricity It is in parallel and electrically connects with direct current power source voltage after connection, second resistance and 3rd resistor series connection, second resistance and 3rd resistor phase The comparison input IN- pins being connected in series a little with voltage comparator of series connection are electrically connected, the comparison output of voltage comparator End is electrically connected to export with signal output apparatus judges prompting contact both ends on off operating mode；The level output end of photo-coupler and Direct current power source voltage positive terminal is accessed after four resistant series, another output end of photo-coupler is straight with being accessed after the 7th resistant series Flow supply voltage negative pole end；The contact voltage drop signal for obtaining relay contact both ends is detected by photo-coupler, when detect after Appliance contact both ends illustrate that relay contact is off when having pressure drop, and are exported and prompted by signal output apparatus；When Detect to illustrate that relay contact both ends are in closure state when the pressure drop of relay contact both ends is zero.
- 3. according to the relay fault detecting circuit described in claim 1, it is characterised in that：Also include a detection relay line Enclose the coil pressure drop detection means of both ends electric signal and a multilevel iudge relay is in normal or failure state comparison and sentenced Break device, is provided with comparison circuit and signal output apparatus in the contact voltage drop detection means, voltage ratio is provided with comparison circuit Compared with device and photo-coupler, the on off operating mode at comparison circuit detection relay contact both ends, and on off operating mode is converted into contact pressure The voltage ratio dropped in signal input comparison circuit is relatively held；The contact voltage drop at relay contact both ends is detected by photo-coupler, when Detect that relay contact both ends have pressure drop to illustrate that relay contact is off, and carried by signal output apparatus output Show；Multilevel iudge circuit, the coil pressure drop at coil signal detection means detection read coil both ends are provided with multilevel iudge device Signal, detection obtains the coil pressure drop signal at coil both ends and contact voltage drop detection means obtains the contact voltage drop letter at contact both ends Whether number common input is compared to the multilevel iudge circuit in multilevel iudge device, be compared and judge contact in closing Whether state simultaneously judges relay in normal or failure state.
- 4. according to the relay fault detecting circuit described in claim 1, it is characterised in that：Also include a detection relay line Enclose the coil signal detection means of two end-coil pressure drop signals, a multilevel iudge relay is in normal or failure state ratio Compared with judgment means, the contact voltage drop detection means detection obtains the contact voltage drop signal at relay contact both ends, the coil Signal supervisory instrument detection obtains the coil pressure drop signal at relay coil both ends, and contact voltage drop signal and coil pressure drop signal are defeated Enter in multilevel iudge device, be compared by multilevel iudge device and whether judge relay in normal or failure state, and led to Cross signal output apparatus detection and obtain whether relay normal or failure state.
- 5. according to the relay fault detecting circuit described in claim 1, it is characterised in that：Described photo-coupler uses chip Model P521 photo-coupler, the input of photo-coupler is in series by first resistor with relay contact both ends to be connected to The input circuit of photo-coupler is formed together；The level output end of photo-coupler is electrically connected with voltage comparator input, light Another output end of coupler is electrically connected with the earth polar in comparison circuit, forms the output loop of photo-coupler.
- 6. according to the relay fault detecting circuit described in claim 3, it is characterised in that：It is provided with described comparison circuit straight Stream supply voltage, the 12nd resistance, the 13rd resistance, the tenth resistance, the 16th resistance and voltage comparator, voltage comparator are adopted The voltage comparator for being LM393 with chip model, the first of voltage comparator compares the electricity of input IN+ pins and photo-coupler Flat output end is electrically connected, and is in parallel and is connected with direct current power source voltage after the 12nd resistance and the 13rd resistant series, and the 12nd What resistance and the 13rd resistance were in series be connected in series a little, and input IN- pins are mutually electrically connected compared with the first of voltage comparator Connect, comparison output end and the signal output apparatus of voltage comparator, which are electrically connected, exports prompting contact both ends on off operating mode；Optocoupler After the level output end of clutch and the tenth resistant series access direct current power source voltage positive terminal, another output end of photo-coupler with Direct current power source voltage negative pole end is accessed after 16th resistant series.
- 7. according to the relay fault detecting circuit described in claim 3, it is characterised in that：Described coil signal detection means Using NOR gate circuit of the chip model for 74h086, relay coil both ends are parallel with the 8th resistance and the 9th resistance, and the 8th What the series connection node after resistance and the 9th resistant series was inputted into NOR gate circuit second compares input IN+ pins, optocoupler The level output end of clutch is electrically connected with voltage comparator input, in another output end and NOR gate circuit of photo-coupler Second compare input IN- pins and be electrically connected, by the coil pressure drop signal at XOR gate read coil both ends, and and contact The contact voltage drop letter at both ends, which is compared, judges whether relay contact is in closure state and judges relay whether in just Normal or failure state.
- 8. according to the relay fault detecting circuit described in claim 3 or 7, it is characterised in that：Described signal output apparatus Output circuit or the instruction output of honey device are indicated using LED；LED instruction output circuits are using the 14th resistance being connected in series With the 2nd LED light emitting diodes, the 14th resistance one end is electrically connected with voltage comparator output end, the other end and the 2nd LED Light-emitting diodes tube anode is electrically connected, and the 2nd LED light-emitting diodes tube cathode is electrically connected with power cathode；NOR gate circuit exports End, which is provided with, judges signal output apparatus, judges that signal output apparatus judges output circuit or the instruction of honey device using LED instructions Output；LED instructions judge output circuit using the 15th resistance and the 3rd LED light emitting diodes being connected in series, the 15th electricity Resistance one end is electrically connected with NOR gate circuit output end, and the other end is electrically connected with the 3rd LED light-emitting diodes tube anodes, and the 3rd LED light-emitting diodes tube cathode is electrically connected with power cathode.
- 9. according to the relay fault detecting circuit described in claim 4, it is characterised in that：Described contact voltage drop detection means Including photo-coupler, the input of photo-coupler is in series by first resistor with relay contact both ends to be joined together to form The input circuit of photoelectrical coupler；Direct current power source voltage is being accessed after the level output end of photo-coupler and the 19th resistant series just Extremely, another output end of photo-coupler forms optocoupler with accessing direct current power source voltage negative pole end after the 14th resistant series The output loop of clutch, at the same photo-coupler another output end input multilevel iudge device in, with multilevel iudge device from Whether the coil pressure drop signal that the second photo-coupler is obtained is compared judgement, judge relay in normal or failure shape State；Coil signal detection means includes the second photo-coupler, after the input both ends difference series resistance of the second photo-coupler with after Electric apparatus coil both ends, which are in parallel, is joined together to form the input circuit of the second photoelectrical coupler；The output two of second photo-coupler End is in parallel after series resistance with direct current power source voltage both ends is joined together to form the output loop of the second photo-coupler respectively, It is connected after level output end the 11st resistance of series connection of second photo-coupler with DC voltage positive polarity, while the second light Another output end of coupler is inputted into multilevel iudge device, with multilevel iudge device from the contact that photo-coupler is obtained Whether pressure drop signal is compared judgement, judge relay in normal or failure state.
- 10. a kind of relay, including relay package shell, relay coil and relay contact, it is characterised in that：Also include One of the described relay fault detecting circuit of claim 1~9, relay package shell, relay coil, relay contact With the common assembly and connection of relay fault detecting circuit together with form the relay finished product that integral type connects.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720507109.3U CN207051445U (en) | 2017-05-09 | 2017-05-09 | A kind of relay fault detecting circuit and the relay with the circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720507109.3U CN207051445U (en) | 2017-05-09 | 2017-05-09 | A kind of relay fault detecting circuit and the relay with the circuit |
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| Publication Number | Publication Date |
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| CN207051445U true CN207051445U (en) | 2018-02-27 |
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| CN201720507109.3U Active CN207051445U (en) | 2017-05-09 | 2017-05-09 | A kind of relay fault detecting circuit and the relay with the circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106990353A (en) * | 2017-05-09 | 2017-07-28 | 浙江英洛华新能源科技有限公司 | A kind of relay fault detecting circuit and the relay with the circuit |
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2017
- 2017-05-09 CN CN201720507109.3U patent/CN207051445U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106990353A (en) * | 2017-05-09 | 2017-07-28 | 浙江英洛华新能源科技有限公司 | A kind of relay fault detecting circuit and the relay with the circuit |
| CN106990353B (en) * | 2017-05-09 | 2023-06-16 | 浙江英洛华新能源科技有限公司 | Relay fault detection circuit and relay with same |
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