CN110456263A - A kind of relay is adhered detection circuit, device and its detection method - Google Patents
A kind of relay is adhered detection circuit, device and its detection method Download PDFInfo
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- CN110456263A CN110456263A CN201910713086.5A CN201910713086A CN110456263A CN 110456263 A CN110456263 A CN 110456263A CN 201910713086 A CN201910713086 A CN 201910713086A CN 110456263 A CN110456263 A CN 110456263A
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Abstract
The present invention provides a kind of relay and is adhered detection circuit, including the first detection circuit being adhered for detecting the first relay, first detection circuit includes first voltage input terminal, second voltage input terminal and the first detection voltage output end, wherein, the first voltage input terminal is connect with the stationary contact of the first relay, the second voltage input terminal is connect with the movable contact of the second relay, and whether the first detection voltage output end is adhered the corresponding first detection voltage value of output according to first relay.Realize firewire and zero curve relay is adhered detection, improves the safety that charging gun uses.The present invention also provides a kind of relays to be adhered detection device and detection method.
Description
Technical field
The present invention relates to relays to be adhered detection technique field, specifically, relating generally to a kind of relay is adhered detection
Circuit, device and its detection method.
Background technique
Support of the country to new-energy automobile, promotes the fast development of new-energy automobile, corresponding matched charging pile
More and more set up, wherein alternating-current charging pile is relatively common one kind, it is mostly built on the parking stall of residential area, or
Other Public Parkings.(pulse width modulation, pulse are wide by controlling the PWM of guidance circuit for alternating-current charging pile
Degree modulation) signal and CP (control pilot function controls guidance function) signal wire and auto communication, the company of realizing
It connects determining, charging current determination and starting stops the communication functions such as charging.
Charging is started and stopped, the way in industry is to control by relay, but there is relay after working long hours
It is likely to occur contact to be adhered, be adhered once there is contact, when charging pile leaves unused, with the alternating current of 220V AC on charging gun
Pressure, there are biggish security risks.
Summary of the invention
It is an object of the invention to overcome the deficiencies of existing technologies, a kind of relay is provided and is adhered detection circuit, Neng Goushi
Existing zero curve, firewire relay are adhered detection, improve the safety in utilization of charging gun；It is glutinous that the present invention also provides a kind of relays
Even detection device.
To achieve the goals above, it adopts the following technical scheme that:
In a first aspect, a kind of relay is adhered detection circuit, comprising: the first detection being adhered for detecting the first relay
Circuit, first detection circuit include first voltage input terminal, second voltage input terminal and first detection voltage output end,
In,
The first voltage input terminal is connect with the stationary contact of the first relay, the second voltage input terminal and second after
The movable contact of electric appliance connects, and whether the first detection voltage output end is adhered output corresponding the according to first relay
One detection voltage value.
Second aspect, a kind of relay are adhered detection device, including processor and detection circuit above-mentioned, wherein described
Processor is used to provide the first enable signal to first relay, and according to first enable signal and first inspection
The the first detection voltage for surveying voltage output end output determines whether first relay is adhered.
The third aspect, a kind of relay are adhered detection method, include the following steps:
It generates and sends the first enable signal to the first relay, and obtained according to the output voltage of first relay
First detection voltage；
Determine whether first relay is adhered according to first enable signal and the first detection voltage；With/
Or,
It generates and sends the second enable signal to the second relay, and obtained according to the output voltage of second relay
Second detection voltage；
Determine whether second relay is adhered according to second enable signal and the second detection voltage.
Beneficial effects of the present invention: the stationary contact and described second by the way that the first detection circuit to be arranged in the first relay
Between the movable contact of relay, the second detection circuit is arranged in the movable contact of the second relay and the stationary contact of the first relay
Between, make the first of the first detection circuit to detect according to the state that is adhered for being adhered state and the second relay of the first relay
Voltage output end or the second detection voltage output end of the second detection circuit export corresponding voltage signal, according to making for relay
It can control signal and detection voltage determine whether corresponding relay is adhered, to realize being adhered for firewire and zero curve relay
Detection, improves the safety that charging gun uses.
Detailed description of the invention
It, below will be to use required in embodiment in order to illustrate more clearly of the technical solution of embodiment of the present invention
Attached drawing be briefly described, it should be understood that the following drawings illustrates only certain embodiments of the invention, therefore should not be seen
Work is limiting the scope of the invention.
Fig. 1 is the circuit theory schematic diagram that relay provided in an embodiment of the present invention is adhered detection circuit；
Fig. 2 is the electrical block diagram of the first detection circuit；
Fig. 3 is the electrical block diagram of the second detection circuit；
Fig. 4 is the first enabled control circuit schematic diagram；
Fig. 5 is the second enabled control circuit schematic diagram；
Fig. 6 is that the relay of the embodiment of the present invention is adhered detection method flow diagram；
Fig. 7 is that the relay of the embodiment of the present invention is adhered an idiographic flow schematic diagram of detection method stream；
Fig. 8 is that the relay of the embodiment of the present invention is adhered an idiographic flow schematic diagram of detection method stream.
Specific embodiment
Hereinafter, various embodiments of the invention will be described more fully.The present invention can have various embodiments,
And it can adjust and change wherein.It should be understood, however, that: it is public herein there is no various embodiments of the invention are limited to
The intention for the particular implementation opened, but should invention is construed as cover the spirit for falling into various embodiments of the invention
With all adjustment, equivalent and/or the optinal plan in range.
Hereinafter, the term " includes " that can be used in the various embodiments of the present invention or " may include " instruction institute are public
The presence of function, operation or the element opened, and the increase of one or more functions, operation or element is not limited.In addition, such as
Used in the various embodiments of the present invention, term " includes ", " having " and its cognate be meant only to indicate special characteristic,
Number, step, operation, the combination of element, component or aforementioned item, and be understood not to exclude first it is one or more its
Its feature, number, step, operation, the combined presence or one or more features of increase, number of element, component or aforementioned item
Word, step, operation, element, component or aforementioned item combination a possibility that.
In the various embodiments of the present invention, statement " A or/and B " include the text listed file names with any combination or
All combinations, such as, it may include A, it may include B or may include A and B both.
The statement (" first ", " second " etc.) used in the various embodiments of the present invention can be modified in various realities
The various constituent element in mode are applied, but respective sets can not be limited into element.For example, the above statement is not intended to limit the element
Sequence and/or importance.The above statement is only used for the purpose for differentiating an element and other elements.For example, first uses
Family device and second user device indicate different user device, although the two is all user apparatus.For example, not departing from the present invention
Various embodiments range in the case where, first element is referred to alternatively as second element, and similarly, second element can also be claimed
For first element.
It should also be noted that in the present invention, unless otherwise specific regulation and definition, the arts such as " installation ", " connection ", " fixation "
Language shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection or being integrally connected；It can be machine
Tool connection, is also possible to be electrically connected；It can be and be directly connected to, and can be indirectly connected through an intermediary；It can be two
Connection inside element.For the ordinary skill in the art, above-mentioned term can be understood at this as the case may be
Concrete meaning in invention.
In the present invention, those skilled in the art are it is to be appreciated that indicating position or positional relationship in text
Term be orientation based on the figure or positional relationship, be merely for convenience of description of the present invention and simplification of the description, without
It is that the device of indication or suggestion meaning or element must have a particular orientation, be constructed and operated in a specific orientation, therefore
It is not considered as limiting the invention.
The term used in the various embodiments of the present invention is only used for the purpose and simultaneously of description particular implementation
It is not intended to limit various embodiments of the invention.Unless otherwise defined, otherwise all terms used herein (including technology
Term and scientific term) have and the normally understood meaning phase of field those of ordinary skill described in various embodiments of the invention
Same meaning.The term (term such as limited in the dictionary generally used) be to be interpreted as have in the relevant technologies
The identical meaning of situational meaning in field and it will be interpreted as having Utopian meaning or meaning too formal, removed
It is non-to be clearly defined in the various embodiments of the present invention.
The embodiment of the present invention provides a kind of relay and is adhered detection circuit, as shown in Figure 1, the relay is adhered detection electricity
Road includes the first detection circuit 3 being adhered for detecting the first relay 1, and first detection circuit includes first voltage input
End, second voltage input terminal and the first detection voltage output end, wherein the first voltage input terminal is quiet with the first relay
Contact connection, the second voltage input terminal are connect with the movable contact of the second relay 2, and first detection circuit 3 is according to institute
State the corresponding first detection voltage value of open and-shut mode output of the first relay.
Further, as shown in Figure 1, the detection circuit further includes the second detection circuit 4, second detection circuit 4
Including tertiary voltage input terminal, the 4th voltage input end and the second detection voltage output end, wherein the tertiary voltage input terminal
It is connect with the movable contact of first relay 12, the stationary contact of the 4th voltage input end and second relay 2 connects
It connects, second detection circuit 4 is according to the corresponding second detection voltage value of the open and-shut mode of second relay 2 output.
Specifically, the movable contact of the first relay 1 is connect with firewire LIN, and the stationary contact of the first relay 1 is the first relay
The voltage output end LOUT of device 1, the movable contact of the second relay 2 are connect with zero curve NIN, and the stationary contact of the second relay is described
The voltage output end NOUT of second relay.The DC voltage that voltage between firewire and zero curve is 220V, frequency 50HZ.
As shown in Fig. 2, first detection circuit includes: first resistor R1, the first photo-coupler U1 and second resistance R2,
Wherein, one end of the first resistor R1 is connect with the stationary contact of first relay 1, the other end of the first resistor R1
It is connect with the anode of the light emitting diode of the first photo-coupler U1, the light emitting diode of the first photo-coupler U1 is born
Pole is connect with the movable contact of second relay 2, and the emitter-base bandgap grading of the photistor of the first photo-coupler U1 is connected to ground,
The collector of the photistor is connect by the second resistance R2 with first voltage end, the current collection of the photistor
The extremely described first detection voltage output end.When first relay is not closed, not formed circuit between L_IN and N_IN,
When first relay 1 closure, circuit is formd between L_IN and N_IN, when input voltage is positive half period, first
The LEDs ON of photo-coupler U1, thus the first detection voltage output end exports low level.Thus, if the first relay
Make can control signal and disconnect the first relay 1, when input voltage be in positive half period and the first detection voltage is low level
When, then illustrate that first relay is adhered, otherwise illustrates that the first relay is not adhered.
Specifically, first detection circuit further includes first diode D1, the cathode of the first diode D1 and institute
State the other end connection of first resistor R1, the light-emitting diodes of the anode and the first photo-coupler U1 of the first diode D1
The cathode of pipe connects.When first relay 1 closure, circuit is formd between L_IN and N_IN, when input voltage is negative
When the half period, first diode D1 is connected and the first photo-coupler U1 is not turned on, thus the first detection voltage output end output is high
Level.Thus, if the signal that makes can control of the first relay disconnects the first relay 1, when input voltage is in negative half-cycle
And first detection voltage be low level when, then illustrate that first relay is adhered, otherwise illustrate that the first relay is not adhered.
Further, first detection circuit further includes 3rd resistor R3, and one end of the first resistor R1 passes through institute
3rd resistor R3 is stated to connect with the stationary contact of first relay 1.By in the first voltage input terminal and described first
Between the cathode of diode D1 access 3rd resistor R3, can to avoid in actual application process when one of resistance occur
When short-circuit, 220V voltage occurs and is applied directly on first diode D1 and the first diode D1 is caused to puncture.
Further, first detection circuit includes the 4th resistance R4 and first capacitor C1, first photo-coupler
The collector of the photistor of U1 is also connected to ground by the 4th resistance R4 and first capacitor C1.
Second detection circuit and the first detection circuit topology having the same, as shown in figure 3, second inspection
Slowdown monitoring circuit includes the 5th resistance R5, the second photo-coupler U2 and the 6th resistance R6, wherein one end of the 5th resistance R5 and institute
The movable contact connection of the first relay 1 is stated, the other end of the 5th resistance R5 shines with the second photo-coupler U2's
The anode connection of diode, the cathode of the light emitting diode of the second photo-coupler U2 and the stationary contact of second relay 2
Point connection, the emitter-base bandgap grading of the phototriode of the second photo-coupler U2 are connected to ground, and the second photo-coupler U2's is photosensitive
The collector of diode is connect by the 6th resistance R6 with first voltage end, and the current collection of the photodiode is extremely described
Second detection voltage output end.When second relay 2 does not disconnect because of being adhered, between the firewire and the zero curve
The circuit for forming closure, when being in the voltage positive half period, the second photo-coupler U2 conducting, thus the second detection electricity
Output end is pressed to export low level, when the enable signal of the second relay is to disconnect second relay, and second detects voltage
When the level of output end output is low level, then illustrate that second relay is adhered.
Further, second detection circuit includes the second diode D2, the cathode of the second diode D2 and institute
The other end connection of the 5th resistance R5 is stated, the anode of the second diode D2 connects with the stationary contact of second relay 2
It connects.It does not disconnect when the second relay is adhered and, when input voltage is negative half-cycle, then the second diode D2 conducting
And the second photo-coupler U2 is not turned on, thus the second detection voltage output end exports high level 3.3V.When enabled letter
Number to disconnect the second relay, and when the voltage of input is negative half-cycle, if the second detection voltage is high level, illustrate the
Two relays are adhered.
Further, second detection circuit further includes the 7th resistance R7, and one end of the 5th resistance R5 passes through institute
The 7th resistance R7 is stated to connect with the movable contact of first relay.It can be avoided and work as by the 5th resistance R5 and the 7th resistance R7
When one of resistive short, the 220V voltage between firewire and zero curve is applied directly to the second photo-coupler U2 or second
So as to cause the second diode D2 breakdown on diode D2.
Further, second detection circuit further includes the 8th resistance R8 and the second capacitor C2, second optical coupling
The collector of the photistor of device U2 also passes through the 8th resistance R8 and the second capacitor C2 is connected to ground.
It should be noted that relay of the invention is adhered detection circuit, the first relay and second can be detected simultaneously
Whether relay is adhered, and can also individually detect whether any one relay therein is adhered, when individually detecting therein
When whether relay of anticipating is adhered, a relay in addition might not be limited to relay, can be that can connect electricity
The original part on road.
The relay of the present embodiment is adhered detection circuit, by the stationary contact that the first detection circuit is arranged in the first relay
Point the movable contact of second relay between, by the second detection circuit be arranged in the second relay movable contact and first after
Between the stationary contact of electric appliance, make the first detection electric according to the state that is adhered for being adhered state and the second relay of the first relay
The first detection voltage output end on road or the second detection voltage output end of the second detection circuit export corresponding voltage signal, root
Determine whether relay is adhered according to the enable signal of relay input and the first detection voltage and the second detection voltage, to realize
Firewire and zero curve relay are adhered detection, improve the safety that charging gun uses.
Based on the embodiment of the present invention one, second embodiment of the present invention provides a kind of relays to be adhered detection device, described device
It include: that processor and relay above-mentioned are adhered detection circuit, wherein
The processor is used to provide the first enable signal to first relay, and according to first enable signal
Determine whether first relay is adhered with the first detection voltage of the first detection voltage output end output.
Further, the processor is also used to provide the second enable signal to second relay, and according to described
Whether second enable signal and the second detection voltage of the second detection voltage output end output determine second relay
It is adhered.
Further, the detection device further includes the first enabled control circuit, the first enabled control circuit it is defeated
Enter end to connect with the first enable signal output end of the processor, the output end of the first enabled control circuit and described the
The enabled input terminal en1 connection of one relay opens and closes enable signal for providing relay for first relay.
Further, the detection device further includes the second enabled control circuit, the second enabled control circuit it is defeated
Enter end to connect with the second enable signal output end of the processor, the output end of the second enabled control circuit and described the
The enabled input terminal en2 connection of two relays opens and closes enable signal for providing relay for second relay.
Further, as shown in figure 4, the first enabled control circuit includes the first triode Q1 and the first field-effect tube
First enable signal of the base stage of MOS1, the 9th resistance R9 and third capacitor C3, the first triode Q1 and the processor
Output end connection, the emitter-base bandgap grading of the first triode Q1 is connected to ground, and the collector of the first triode Q1 passes through described the
Nine resistance R9 are connect with second voltage end, grid of the collector of the first triode Q1 also with the first field-effect tube MOS1
Pole connection, the source electrode of the first field-effect tube MOS1 connect with the enable signal input terminal of first relay 1, and described the
The source electrode of one field-effect tube MOS1 is also connect by the third capacitor C3 with the emitter-base bandgap grading of the first triode Q1, and described first
The drain electrode of field-effect tube MOS1 is also connect with the second voltage output end.
Further, the first enable signal control circuit further includes the tenth resistance R10 and the 4th capacitor C4, and described
The base stage of one triode Q1 is also connect by the tenth resistance R10 with the first enable signal output end of the processing, described
The base stage of first triode Q1 also passes through the 4th capacitor C4 and is connected to ground.
Further, the source electrode of the first field-effect tube MOS1 also passes through the 6th capacitor C6 and the 7th capacitor C7 shape
At parallel branch be connected to ground.
Further, the detection device further includes third diode D3 and twelfth resistor R12, the third diode
The cathode of D3 is connect with the enable signal input terminal of first relay 1, and the anode of the third diode D3 passes through described
Twelfth resistor R12 is connected to ground.When the first relay, which is in, is adhered state, the energy storage of the coil of the first relay can pass through
The third diode D3 and the twelfth resistor R12 release.
Further, as shown in figure 5, the second enabled control circuit includes the second triode Q2, the second field-effect tube
MOS2, thirteenth resistor R13 and the 4th capacitor C4, the base stage of the second triode Q2 and the second relay of the processor
The connection of enable signal output end, the emitter-base bandgap grading of the second triode Q2 are connected to ground, and the collector of the second triode Q2 is logical
It crosses the thirteenth resistor R13 to connect with second voltage end, the collector of the second triode Q2 is also imitated with described second
Should pipe MOS2 grid connection, the enable signal input terminal of the source electrode of the second field-effect tube MOS2 and second relay
Connection, the drain electrode of the second field-effect tube MOS2 are connect with the second voltage end, and the emitter-base bandgap grading of the second triode Q2 is also
It is connect by the 4th capacitor with the source electrode of second field-effect tube.
Further, the described second enabled control circuit further includes the 15th resistance R15 and the 5th capacitor C5, and described second
The base stage of triode Q2 is connected by the second relay enable signal output end of the 15th resistance R15 and the processor
It connects, the base stage of the second triode Q2 also passes through the 5th capacitor and is connected to ground.
Further, the described second enabled control circuit further includes the 16th resistance R16, and the second triode Q2's penetrates
Pole also passes through the 16th resistance R16 and is connected to ground.
Further, the described second enabled control circuit further includes the 7th capacitor C7 and the 8th capacitor C8, and described second
The source electrode of effect pipe MOS2 is also connected to ground by the parallel branch that the 7th capacitor C7 and the 8th capacitor C8 is formed.
Further, the detection device further includes the 4th diode D4 and the 17th resistance R17, the 4th diode
The cathode of D4 is connect with the enable signal input terminal en2 of second relay 2, and the anode of the 4th diode D4 is logical described
17th resistance R17 is connected to ground.When the second relay, which is in, is adhered state, the energy storage of the coil of the second relay can pass through
The 4th diode D4 and the 17th resistance R17 release.
Based on the embodiment of the present invention two, the embodiment of the present invention three also provides a kind of relay and is adhered detection method, such as Fig. 6 institute
Show, this method comprises the following steps:
S1, generation simultaneously send the first enable signal to the first relay, and according to the output voltage of first relay
Obtain the first detection voltage；Whether first relay is determined according to first enable signal and the first detection voltage
It is adhered；And/or
S2, generation simultaneously send the second enable signal to the second relay, and according to the output voltage of second relay
Obtain the second detection voltage；Whether second relay is determined according to second enable signal and the second detection voltage
It is adhered.
Specifically, as shown in fig. 7, the step S1 includes S11, generates and sends the first enabled letter to the first relay
Number, and the first detection voltage is obtained according to the output voltage of first relay；S12 is according to first enable signal and institute
It states the first detection voltage and determines whether first relay is adhered.
Specifically, if the step S12 includes: first enable signal to disconnect first relay, described the
Input voltage amplitude between one relay and the movable contact of second relay is timing, and described first detects voltage
For low level 0V, it is determined that first relay is adhered.
Specifically, the step S12 further include: described if first enable signal is to disconnect first relay
When input voltage amplitude between the movable contact of first relay and the movable contact of second relay is negative, and described
One detection voltage is high level 3.3V, it is determined that first relay is adhered.
Further, as shown in figure 8, the step S2 includes:
S21, generation simultaneously send the second enable signal to the second relay, and according to the output voltage of second relay
Obtain the second detection voltage；
S22, determine whether second relay sticks according to second enable signal and the second detection voltage
Even.
Further, the S22 includes:
If second enable signal is to disconnect second relay, the movable contact of first relay and described the
The amplitude of input voltage between the movable contact of two relays is greater than zero, and the second detection voltage is low level 0V, then
Second relay is adhered.
Specifically, the step S22 further include:
If second enable signal is to disconnect second relay, the movable contact of first relay and described the
The amplitude of input voltage between the movable contact of two relays is negative, and the second detection voltage is high level, it is determined that institute
The second relay is stated to be adhered.
Only several embodiments of the present invention are expressed for embodiment described above, and the description thereof is more specific and detailed, but
It cannot be understood as limitation of the scope of the invention.It should be pointed out that it will be apparent to those skilled in the art that can root
According to technical solution described above and design, various other corresponding changes and deformation are made, and all these change
And deformation all should belong within the scope of protection of the claims of the present invention.
Claims (33)
1. a kind of relay is adhered detection circuit, which is characterized in that including the first detection being adhered for detecting the first relay
Circuit, first detection circuit include first voltage input terminal, second voltage input terminal and first detection voltage output end,
In,
The first voltage input terminal is connect with the stationary contact of the first relay, the second voltage input terminal and the second relay
Movable contact connection, the movable contact of first relay connects to power supply, the movable contact and the electricity of second relay
Source connection, the first detection voltage output end output the first detection voltage, the first detection voltage is for determining described the
Whether one relay is adhered.
2. detection circuit according to claim 1, which is characterized in that the detection circuit further includes the second detection circuit,
Second detection circuit includes tertiary voltage input terminal, the 4th voltage input end and the second detection voltage output end, wherein
The tertiary voltage input terminal is connect with the movable contact of first relay, the 4th voltage input end and described the
The stationary contact of two relays connects, the second detection voltage output end output the second detection voltage, the second detection voltage
For determining whether second relay is adhered.
3. detection circuit according to claim 1 or 2, which is characterized in that first detection circuit includes: the first electricity
Resistance, the first photo-coupler and second resistance, wherein
One end of the first resistor is connect with the stationary contact of first relay, the other end of the first resistor with it is described
The anode connection of the light emitting diode of first photo-coupler, the cathode of the light emitting diode of first photo-coupler and described the
The movable contact of two relays connects, and the emitter-base bandgap grading of the photistor of first photo-coupler is connected to ground, the photosensitive crystal
The collector of pipe is connect by the second resistance with first voltage end, extremely described first inspection of the current collection of the photistor
Survey voltage output end.
4. detection circuit according to claim 3, which is characterized in that first detection circuit further includes the one or two pole
Pipe,
The cathode of the first diode is connect with the other end of the first resistor, the first diode anode with it is described
The cathode of the light emitting diode of first photo-coupler connects.
5. detection circuit according to claim 4, which is characterized in that first detection circuit further includes 3rd resistor,
One end of the first resistor is connect by the 3rd resistor with the stationary contact of first relay.
6. detection circuit according to claim 5, which is characterized in that first detection circuit includes the 4th resistance and the
One capacitor, the collector of the photistor of first photo-coupler are also connected by the 4th resistance and first capacitor and ground
It connects.
7. detection circuit according to claim 2, which is characterized in that second detection circuit includes the 5th resistance, the
Two photo-couplers and the 6th resistance, wherein
One end of 5th resistance is connect with the movable contact of first relay, the other end of the 5th resistance and institute
State the light emitting diode of the second photo-coupler anode connection, the cathode of the light emitting diode of second photo-coupler with it is described
The stationary contact of second relay connects, and the emitter-base bandgap grading of the phototriode of second photo-coupler is connected to ground, second light
The collector of the photodiode of coupler is connect by the 6th resistance with first voltage end, the collection of the photodiode
Electrode is the second detection voltage output end.
8. detection circuit according to claim 7, which is characterized in that second detection circuit includes the second diode,
The cathode of second diode is connect with the other end of the 5th resistance, the anode of second diode and described the
The stationary contact of two relays connects.
9. detection circuit according to claim 8, which is characterized in that second detection circuit further includes the 7th resistance,
One end of 5th resistance is connect by the 7th resistance with the movable contact of first relay.
10. detection circuit according to claim 9, which is characterized in that second detection circuit further includes the 8th resistance
With the second capacitor, the collector of the photistor of second photo-coupler also pass through the 8th resistance and the second capacitor with
Ground connection.
11. a kind of relay is adhered detection device, which is characterized in that including processor and as described in claim any one of 1-10
Detection circuit, wherein
The processor is used to provide the first enable signal to first relay, and according to first enable signal and institute
The the first detection voltage for stating the output of the first detection voltage output end determines whether first relay is adhered.
12. detection device according to claim 11, which is characterized in that the processor is also used to second relay
Device provides the second enable signal, and according to the second inspection of second enable signal and the second detection voltage output end output
It surveys voltage and determines whether second relay is adhered.
13. detection device according to claim 11 or 12, which is characterized in that the detection device further includes first enabled
Control circuit, the input terminal of the first enabled control circuit are connect with the first enable signal output end of the processor, institute
The output end for stating the first enabled control circuit is connect with the enabled input terminal of first relay, for being first relay
Device provides relay and is opened and closed enable signal.
14. detection device according to claim 13, which is characterized in that the detection device further includes second making can control
Circuit, the input terminal of the second enabled control circuit are connect with the second enable signal output end of the processor, and described
The output end of two enabled control circuits is connect with the enabled input terminal of second relay, for mentioning for second relay
Enable signal is opened and closed for relay.
15. detection device described in 3 or 14 according to claim 1, which is characterized in that the first enabled control circuit includes the
One triode and the first field-effect tube, the 9th resistance and third capacitor, base stage and the processor of first triode
The connection of first enable signal output end, the emitter-base bandgap grading of first triode are connected to ground, and the collector of first triode is logical
It crosses the 9th resistance to connect with second voltage end, grid of the collector of first triode also with first field-effect tube
Pole connection, the source electrode of first field-effect tube are connect with the enable signal input terminal of first relay, and described first
The source electrode of effect pipe is also connect by the third capacitor with the emitter-base bandgap grading of first triode, the leakage of first field-effect tube
Pole is also connect with the second voltage output end.
16. detection device according to claim 15, which is characterized in that the first enable signal control circuit further includes
Tenth resistance and the 4th capacitor, the base stage of first triode are also enabled by the first of the tenth resistance and the processing
Signal output end connection, the base stage of first triode also pass through the 4th capacitor and are connected to ground.
17. detection device according to claim 16, which is characterized in that the first enable signal control circuit further includes
The emitter-base bandgap grading of eleventh resistor, first triode is also connected to ground by the eleventh resistor.
18. detection device according to claim 17, which is characterized in that the source electrode of first field-effect tube also passes through institute
The parallel branch that the 6th capacitor and the 7th capacitor are formed is stated to be connected to ground.
19. detection device according to claim 18, which is characterized in that the detection device further include third diode and
Twelfth resistor, the cathode of the third diode are connect with the enable signal input terminal of first relay, the third
The anode of diode is connected to ground by the twelfth resistor.
20. detection device according to claim 12, which is characterized in that the second enabled control circuit includes the two or three
Pole pipe, the second field-effect tube, thirteenth resistor and the 4th capacitor, the base stage of second triode and the second of the processor
The connection of enable signal output end, the emitter-base bandgap grading of second triode are connected to ground, and the collector of second triode passes through institute
It states thirteenth resistor to connect with second voltage end, grid of the collector of second triode also with second field-effect tube
Connection, the source electrode of second field-effect tube are connect with the enable signal input terminal of second relay, second effect
Should the drain electrode of pipe connect with the second voltage end, the emitter-base bandgap grading of second triode also passes through the 4th capacitor and described the
The source electrode of two field-effect tube connects.
21. detection device according to claim 20, which is characterized in that the second enabled control circuit further includes the tenth
The base stage of five resistance and the 5th capacitor, second triode is enabled by the second of the 15th resistance and the processor
Signal output end connection, the base stage of second triode also pass through the 5th capacitor and are connected to ground.
22. detection device according to claim 21, which is characterized in that the second enabled control circuit further includes the tenth
Six resistance, the emitter-base bandgap grading of second triode also pass through the 16th resistance and are connected to ground.
23. detection device according to claim 22, which is characterized in that the second enabled control circuit further includes the 7th
Capacitor and the 8th capacitor, the source electrode of second field-effect tube also pass through it is that the 7th capacitor and the 8th capacitor are formed and
Connection branch is connected to ground.
24. detection device according to claim 14, which is characterized in that the detection device further include the 4th diode and
The cathode of 17th resistance, the 4th diode is connect with the enable signal input terminal of second relay, and the described 4th
The anode of diode leads to the 17th resistance and is connected to ground.
25. a kind of relay is adhered detection method, which comprises the steps of:
It generates and sends the first enable signal to the first relay, and obtain first according to the output voltage of first relay
Detect voltage；
Determine whether first relay is adhered according to first enable signal and the first detection voltage；And/or
It generates and sends the second enable signal to the second relay, and obtain second according to the output voltage of second relay
Detect voltage；
Determine whether second relay is adhered according to second enable signal and the second detection voltage.
26. detection method according to claim 25, which is characterized in that the output electricity according to first relay
Pressure obtains the first detection voltage
When the amplitude of the output voltage of first relay is greater than zero, the first detection voltage is low level；When described
When the amplitude of the output voltage of first relay is less than zero, the first detection voltage is high level.
27. detection method according to claim 26, which is characterized in that described according to first enable signal and described
First detection voltage determines whether first relay is adhered and includes:
When first enable signal is to disconnect first relay, the first detection voltage is low level, it is determined that institute
The first relay is stated to be adhered.
28. detection method according to claim 26, which is characterized in that described according to first enable signal and described
First detection voltage determines whether first relay is adhered and includes:
When first enable signal is to disconnect first relay, the first detection voltage is high level, it is determined that institute
The first relay is stated to be adhered.
29. the detection method according to claim 27 or 28, it is characterised in that:
The high level is 3.3V, and the low level is 0V.
30. detection method according to claim 25, which is characterized in that obtained according to the output voltage of second relay
The second detection voltage is taken to include:
When the output voltage of second relay is greater than zero, the second detection voltage is high level, when second relay
For the output voltage of device less than zero, the second detection voltage is low level.
31. detection method according to claim 30, which is characterized in that according to second enable signal and described second
Detection voltage determines whether second relay is adhered and includes:
When second enable signal is to disconnect second relay, the second detection voltage is low level, then described the
Two relays are adhered.
32. detection method according to claim 30, which is characterized in that according to second enable signal and described second
Detection voltage determines whether second relay is adhered and includes:
When second enable signal is to disconnect second relay, the second detection voltage is high level, then described the
Two relays are adhered.
33. the detection method according to claim 31 or 32, it is characterised in that:
The high level is 3.3V, and the low level is 0V.
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| CN201910713086.5A CN110456263A (en) | 2019-08-02 | 2019-08-02 | A kind of relay is adhered detection circuit, device and its detection method |
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Effective date of registration: 20210519 Address after: 201613 301 Rong Le Dong Road, Songjiang District, Shanghai. Applicant after: Hengda hengchi New Energy Vehicle Research Institute (Shanghai) Co.,Ltd. Address before: 518000 Room 201, building A, No. 1, Qian Wan Road, Qianhai Shenzhen Hong Kong cooperation zone, Shenzhen, Guangdong (Shenzhen Qianhai business secretary Co., Ltd.) Applicant before: HENGDA SMART CHARGING TECHNOLOGY Co.,Ltd. |