CN208270637U - Photoelectric isolating circuit - Google Patents
Photoelectric isolating circuit Download PDFInfo
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- CN208270637U CN208270637U CN201821008295.7U CN201821008295U CN208270637U CN 208270637 U CN208270637 U CN 208270637U CN 201821008295 U CN201821008295 U CN 201821008295U CN 208270637 U CN208270637 U CN 208270637U
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Abstract
This application involves a kind of photoelectric isolating circuits, it include: optocoupler output circuit, feedback measuring circuit, comparison circuit and control switch circuit, optocoupler output circuit connection feedback measuring circuit, it feeds back measuring circuit and connects comparison circuit, comparison circuit connects optocoupler output circuit, and optocoupler output circuit connects control switch circuit.Above-mentioned photoelectric isolating circuit, comparison circuit compares the input of optocoupler output circuit with output state according to input signal and acquisition signal, and output control signal control control switch circuit disconnects when the input of optocoupler output circuit and output state are inconsistent, output control signal makes control switch closing of circuit when the input of optocoupler output circuit is consistent with output state.Foregoing circuit can be inconsistent in the input of optocoupler output circuit and output state, and control control switch circuit enters off-state, to avoid that malfunction occurs, improves the security reliability of photoelectric isolating circuit.
Description
Technical field
This application involves technical field of electric power, more particularly to a kind of photoelectric isolating circuit.
Background technique
The automatic safety device of electric system is a kind of high-voltage web system computerized equipment, can by output after
Electric appliance contact is incorporated to or cuts off setting to power circuit and power plant to realize, can if automatic safety device occurs accidentally to touch
Safety responsibility accident occurs, or even will affect the stable operation of power grid.It is aobvious accordingly, with respect to the output reliability of automatic safety device
It obtains particularly important.
The output relay of traditional automatic safety device is driven by photoelectric coupling circuit, during the work time, light
Coupling device be easy it is breakdown by the effect of forceful electric power so that relay tip closure and occur accidentally to touch and make.Therefore, it passes
The photoelectric coupling circuit of system haves the shortcomings that security reliability is low.
Utility model content
Based on this, it is necessary to for the low problem of traditional automatic safety device security reliability, provide a kind of photoelectricity every
From circuit.
A kind of photoelectric isolating circuit, optocoupler output circuit；Control switch circuit；Acquire the optocoupler output circuit output
Signal obtains acquisition signal, and exports to the feedback measuring circuit of comparison circuit；Input signal controls the light based on the received
The on-off of coupling output circuit, receives the acquisition signal of the feedback measuring circuit output, and outputs control signals to the control
Switching circuit processed controls the comparison circuit of the on-off of the control switch circuit；The optocoupler output circuit connects the feedback
Measuring circuit, the feedback measuring circuit connect the comparison circuit, and the comparison circuit connects the optocoupler output circuit, institute
It states optocoupler output circuit and connects the control switch circuit.
It in one embodiment, further include locking warning circuit, the locking warning circuit connects the comparison circuit.
In one embodiment, the comparison circuit includes connecting the feedback measuring circuit and the optocoupler output circuit
Programmable logic device.
In one embodiment, the optocoupler output circuit includes starting optocoupler output circuit and movement optocoupler output electricity
Road, the starting optocoupler output circuit connect the programmable logic device, and the starting optocoupler output circuit connects the control
Switching circuit processed, the starting optocoupler output circuit connect the feedback measuring circuit, the movement optocoupler output circuit connection
The programmable logic device, the movement optocoupler output circuit connect the control switch circuit, the movement optocoupler output
Measuring circuit is fed back described in circuit connection.
In one embodiment, the starting optocoupler output circuit include the first current-limiting resistance, the first rectifier diode and
First photo-coupler, the movement optocoupler output circuit include the second current-limiting resistance, the second rectifier diode and the second optical coupling
One end of device, one end of first current-limiting resistance and second current-limiting resistance is all connected with power supply, first current-limiting resistance
The other end connect first photo-coupler light emitting diode anode, the light emitting diode of first photo-coupler
Cathode connects the programmable logic device, one end connection of the phototriode of first photo-coupler first rectification
The anode of the cathode of diode, first rectifier diode connects the control switch circuit, second photo-coupler
The other end of phototriode is grounded；The other end of second current-limiting resistance connects the light-emitting diodes of second photo-coupler
The cathode of the anode of pipe, the light emitting diode of second photo-coupler connects the programmable logic device, second light
One end of the phototriode of coupler connects the control switch circuit, the phototriode of second photo-coupler it is another
One end ground connection.
In one embodiment, the control switch circuit includes starting control switch circuit and action control switch electricity
Road, action control switch circuit described in the starting control switch circuit connection, described in the starting control switch circuit connection
The anode of first rectifier diode, the anode of the second rectifier diode described in the action control switch circuit connection.
In one embodiment, the control switch circuit is relay circuit, and the starting control switch circuit includes
First switch diode, the first relay coil and the first relay contact, the action control switch circuit are opened including second
Close diode, the second relay coil and the second relay contact, the anode connection described first of the first switch diode
The anode of rectifier diode, the cathode of the first switch diode connect one end of first relay coil, and described
The other end of one relay coil connects the anode of first rectifier diode, one end connection of first relay coil
Power supply, first relay contact connect one end of second relay coil；The anode of the second switch diode
The anode of second rectifier diode is connected, the cathode of the second switch diode connects second relay coil
One end, the other end of second relay coil connect the anode of second rectifier diode, the second relay touching
The connection external equipment of point.
In one embodiment, the feedback measuring circuit includes starting state measuring circuit and action state measurement electricity
Road, the starting state measuring circuit connect the programmable logic device, the starting state measuring circuit connection described the
The cathode of one rectifier diode, the action state measuring circuit connect the programmable logic device, and the action state is surveyed
Measure the cathode of the second rectifier diode described in circuit connection.
In one embodiment, the starting state measuring circuit includes third current-limiting resistance, third photo-coupler and
One pull-up resistor, the action state measuring circuit include the 4th current-limiting resistance, the 4th photo-coupler and the second pull-up resistor, institute
The first pull-up resistor connection power supply is stated, first pull-up resistor connects the programmable logic device, the first pull-up electricity
Resistance connects the open-collector gate of the third photo-coupler, and one end of the phototriode of the third photo-coupler connects institute
State the first pull-up resistor, the other end ground connection of the phototriode of the third photo-coupler, the hair of the third photo-coupler
The anode of optical diode connects one end of the third current-limiting resistance, and the other end of the third current-limiting resistance connects power supply, institute
State the light emitting diode of third photo-coupler cathode connect first photo-coupler phototriode one end；Described
Two pull-up resistors connect power supply, and second pull-up resistor connects the programmable logic device, and second pull-up resistor connects
Connect the open-collector gate of the 4th photo-coupler, one end connection of the phototriode of the 4th photo-coupler described the
Two pull-up resistors, the other end ground connection of the phototriode of the 4th photo-coupler, luminous the two of the 4th photo-coupler
The anode of pole pipe connects one end of the 4th current-limiting resistance, and the other end of the 4th current-limiting resistance connects power supply, and described the
The cathode of the light emitting diode of four photo-couplers connects one end of the phototriode of second photo-coupler.
In one embodiment, the movement optocoupler output circuit, the action control switch circuit and the movement shape
The quantity of state measuring circuit is two or more, and the movement optocoupler output circuit, the action control switch are electric
Road is consistent with the quantity of the action state measuring circuit.
Above-mentioned photoelectric isolating circuit, the signal that feedback measuring circuit can acquire the output of optocoupler output circuit obtain acquisition letter
Number and be sent to comparison circuit, input and output shape of the comparison circuit according to input signal and acquisition signal to optocoupler output circuit
State compares, and the output control signal control control switch electricity when the input of optocoupler output circuit and output state are inconsistent
Road disconnects, and output control signal makes control switch closing of circuit when the input of optocoupler output circuit is consistent with output state.Pass through
The signal of feedback measuring circuit acquisition optocoupler output circuit is compared with input signal, and in the input of optocoupler output circuit and
Output state is inconsistent, and control control switch circuit enters off-state, to avoid that malfunction occurs, improves Phototube Coupling electricity
The security reliability on road.
Detailed description of the invention
Fig. 1 is photoelectric isolating circuit structural schematic diagram in an embodiment；
Fig. 2 is photoelectric isolating circuit structural schematic diagram in another embodiment；
Fig. 3 is photoelectric isolating circuit structural schematic diagram in another embodiment；
Fig. 4 is photoelectric isolating circuit structural schematic diagram in another embodiment；
Fig. 5 is that signal judges flow diagram in an embodiment.
Specific embodiment
The application in order to facilitate understanding is described more fully the application below with reference to relevant drawings.In attached drawing
Give the preferred embodiment of the application.But the application can realize in many different forms, however it is not limited to herein
Described embodiment.On the contrary, purpose of providing these embodiments is keeps the understanding to disclosure of this application more saturating
It is thorough comprehensive.
Referring to Fig. 1, a kind of photoelectric isolating circuit, comprising: optocoupler output circuit 100；Control switch circuit 200；Acquisition
The signal that optocoupler output circuit 100 exports obtains acquisition signal, and exports to the feedback measuring circuit 300 of comparison circuit 400；Root
According to the on-off of received input signal control optocoupler output circuit 100, the acquisition signal that feedback measuring circuit 300 exports is received,
And control switch circuit 200 is output control signals to, control the comparison circuit 400 of the on-off of control switch circuit 200；Optocoupler
The connection feedback measuring circuit 300 of output circuit 100, feedback measuring circuit 300 connect comparison circuit 400, and comparison circuit 400 connects
Optocoupler output circuit 100, optocoupler output circuit 100 connect control switch circuit 200.
Specifically, the connection of optocoupler output circuit 100 feedback measuring circuit 300, feedback measuring circuit 300 being capable of real-time reception
The output signal of optocoupler output circuit 100, and send comparison circuit 400 for received signal and analyze and determine, according to not
Same judging result carrys out control switch circuit and is in different working conditions.Under normal operating conditions, i.e. optocoupler output circuit 100
There is no in the case where failure, the reception input signal of optocoupler output circuit 100 makes the photo-coupler of optocoupler output circuit 100
Part is in the conductive state, passes the signal to control switch circuit 200, so that control switch circuit 200 connects with external equipment
It connects, is formed into a loop, to send signal to corresponding equipment.Feedback measuring circuit 300 can acquire optocoupler output in real time
The output signal amount of circuit 100, sends the signal of acquisition to the input signal of comparison circuit 400 Yu optocoupler output circuit 100
It compares and analyzes, judges whether the output signal amount of optocoupler output circuit 100 is equal with input signal amount, to judge optocoupler
Whether output circuit 100 works normally.Under abnormal operating state, by taking optocoupler output circuit 100 is without input signal as an example,
I.e. the input of optocoupler output circuit 100 is 0, and the output signal that feedback measuring circuit 300 collects optocoupler output circuit 100 is also
0, then by comparing the judgement of circuit 400, optocoupler output circuit 100 is worked normally at this time；If feedback measuring circuit 300 collects light
The output signal of coupling output circuit 100 is 1, i.e., in the case where optocoupler output circuit 100 is connected in the input of no signal, optocoupler
Output circuit 100 breaks down (such as photo-coupler is breakdown) and in the conductive state, then judges this by comparing circuit 400
When 100 abnormal work of optocoupler output circuit, comparison circuit is according to multilevel iudge as a result, sending lock-in control signal through optocoupler at this time
Output circuit 100 is transferred to control switch circuit 200, control switch circuit 200 based on the received lock-in control signal disconnect with
The connection of external equipment.When optocoupler 100 operation irregularity of output circuit, comparison circuit 400 sends block signal (i.e. control letter
Number) to control switch circuit 200, so that the contact of control switch circuit 200 is disconnected with external equipment, to avoid occurring
Malfunction.It is set it should be pointed out that the external equipment connecting with control switch circuit 200 can be the electric power such as transformer, generator
It is standby.It is appreciated that feedback measuring circuit 300 detects optocoupler output electricity when the input signal of optocoupler output circuit 100 is 1
The output signal on road 100 is 0, i.e. optocoupler output circuit 100 works without signal based on the received, referred to as tripping, at this time
Also think that failure has occurred in optocoupler output circuit 100.In one embodiment, above-mentioned photoelectric isolating circuit is applied to safety automation
Device, by foregoing circuit, can be breakdown in photo-coupler and when being connected, cut off the connection between power system device, prevent
Only occur accidentally to touch, the power supply reliability of electric system can be effectively improved, guarantee the safe operation of electric system.
In one embodiment, referring to Fig. 2, photoelectric isolating circuit further includes locking warning circuit 500, locking alarm electricity
Road 500 connects comparison circuit 400.
Specifically, locking warning circuit 500 connects comparison circuit 400, when comparison circuit 400 thinks optical coupling by judgement
When output circuit breaks down, comparison circuit 400 can also send alarm signal to locking warning circuit 500, be latched warning circuit
500 issue corresponding warning information according to alarm signal.It can be when optocoupler output circuit 100 breaks down by warning circuit
Staff is reminded in time, effectively improves the operation ease of photoelectric isolating circuit.It is appreciated that locking warning circuit
500 can connect external alert device, when receiving locking alarm signal, warning message can occur by warning device.
Further, warning device can be phonetic alarm device, indicator light alarm device etc., as long as can effectively send out warning message
Give staff.
In one embodiment, comparison circuit 400 includes connection feedback measuring circuit 300 and optocoupler output circuit 100
Programmable logic device.
Specifically, programmable logic device can be FPGA (Field Programmable Gate Array, scene can
Program gate array), PLD (Programmable Logic Device, programmable logic device) or CPLD (Complex
Programmable Logic Device, Complex Programmable Logic Devices) etc..Comparison circuit 400 passes through programmable logic device
Logical expression or other circuit forms such as logic chart realize the comparative analysis to input signal and acquisition signal, when receiving
After the measurement feedback result for feeding back measuring circuit 300, the transmission of faulty action preventing can be achieved with according to simple logic judgment, there is behaviour
Make the high advantage of convenience.
In one embodiment, referring to Fig. 3, optocoupler output circuit 100 includes starting optocoupler output circuit 110 and movement
Optocoupler output circuit 120, starting optocoupler output circuit 110 connect programmable logic device, and starting optocoupler output circuit 110 connects
Control switch circuit 200, the starting connection feedback measuring circuit 300 of optocoupler output circuit 110, movement optocoupler output circuit 120 connect
Programmable logic device is connect, movement optocoupler output circuit 120 connects control switch circuit 200, and movement optocoupler output circuit 120 connects
Reversed feedback measuring circuit 300.
Specifically, start the suitable switching circuit of optocoupler output circuit 110, only when receive enabling signal make start optocoupler
When output circuit 110 is started to work, could action signal based on the received, make to act optocoupler output signal and execute corresponding movement
Signal output.In the case that starting optocoupler output circuit 110 receives enabling signal, movement optocoupler output circuit 120 is received
When to action signal, it action signal can just be worked accordingly based on the received, can be improved the work of optocoupler output circuit
Reliability.
Further, in one embodiment, referring to Fig. 4, starting optocoupler output circuit 110 includes the first current-limiting resistance
R1, the first rectifier diode D1 and the first photo-coupler 111, movement optocoupler output circuit 120 include the second current-limiting resistance R2, the
One end of two rectifier diode D2 and the second photo-coupler 121, the first current-limiting resistance R1 and the second current-limiting resistance R2 are all connected with electricity
The other end of source VCC, the first current-limiting resistance R1 connect the anode of the light emitting diode D5 of the first photo-coupler 111, the first optocoupler
The cathode of the light emitting diode D5 of clutch 111 connects programmable logic device, the phototriode B1's of the first photo-coupler 111
The cathode of the first rectifier diode D1 of one end connection, the anode connection control switch circuit 200 of the first rectifier diode D1, second
The other end of the phototriode B2 of photo-coupler 121 is grounded；The other end of second current-limiting resistance R2 connects the second photo-coupler
The cathode of the anode of 121 light emitting diode D6, the light emitting diode D6 of the second photo-coupler 121 connects programmable logic device
One end of part, the phototriode B2 of the second photo-coupler 121 connects control switch circuit 200, the light of the second photo-coupler 121
The other end of quick triode B2 is grounded.
Specifically, programmable logic device can receive enabling signal and action signal, when programmable logic device receives
When to enabling signal and action signal, if optical coupling output circuit is in normal operating conditions before this, i.e., without corresponding
Block signal generates.The cathode and the second optical coupling of the light emitting diode D5 of programmable logic device and the first photo-coupler 111
The I/O pin of the cathode connection of the light emitting diode D6 of device 121 is set to low level, and current signal passes through the first current limliting electricity respectively
Resistance R1 and the second current-limiting resistance R2 is sent to the anode and the second photo-coupler of the light emitting diode D5 of the first photo-coupler 111
The anode of 121 light emitting diode D6 makes the first photo-coupler 111 and the second photo-coupler 121 be on state, respectively
Control switch circuit 200 is sent signal to by the first rectifier diode D1 and the second rectifier diode D2.It should be understood that
It is that in one embodiment, the supply voltage being connected with the first current-limiting resistance R1 is 3.3V；It is appreciated that in other embodiments
In, which can also be the voltage of other sizes, as long as can realize that the conducting of optocoupler output circuit 100 is by the voltage
It can.
In one embodiment, referring to Fig. 3, control switch circuit 200 includes starting control switch circuit 210 and movement
Control switch circuit 220 starts 210 connecting moves control switch circuit 220 of control switch circuit, starts control switch circuit
The anode of 210 the first rectifier diode D1 of connection, action control switch circuit 220 connect the anode of the second rectifier diode D2.
Specifically, starting control switch circuit 210 is corresponding with starting optocoupler output circuit 110, starts control switch
Circuit 210 passes through one end of contact connecting moves control switch circuit 220, and the power supply of action control switch circuit 220 is activated
Control switch circuit 210 controls, only when starting control switch circuit 210 receives the output of starting optocoupler output circuit 110
When signal, step switch control circuit 220 action signal could enter normal operating conditions or locking work shape based on the received
State, i.e. action control switch circuit 220 are connected or disconnected with external equipment.
Further, in one embodiment, referring to Fig. 4, starting control switch circuit 210 includes two pole of first switch
Pipe D3, the first relay coil J1 and the first relay contact C1, moving control switch circuit 220 includes second switch diode
D4, the second relay coil J2 and the second relay contact C2, two poles of the first rectification of anode connection of first switch diode D3
The anode of pipe D1, the cathode of first switch diode D3 connect one end of the first relay coil J1, the first relay coil J1
The other end connect the anode of the first rectifier diode D1, one end of the first relay coil J1 connects power supply VCC, the first relay
One end of device contact C1 the second relay coil of connection J2；The anode of second switch diode D4 connects the second rectifier diode D2
Anode, the cathode of second switch diode D4 connects one end of the second relay coil J2, and the second relay coil J2's is another
One end connects the anode of the second rectifier diode D2, the connection external equipment of the second relay contact C2.
Specifically, the first relay coil J1 and the first relay contact C1 forms the first relay, the second relay line
It encloses J2 and the second relay contact C2 and forms the second relay.The anode of first switch diode D3 and second switch diode D4
It is separately connected the anode of the first rectifier diode D1 and the anode of the second rectifier diode D2, when optocoupler output circuit 100 is normal
When work, electric current is unidirectionally absorbed through first switch diode D3 and second switch diode D4, makes the first relay coil respectively
J1 and the second relay coil J2 conducting, the electric current and magnetic generated by the isolated power supply being connected with the first relay coil J1
Power, driving the first relay contact C1 closure, further drives the second relay contact C2 to be closed.It should be pointed out that
In one embodiment, the supply voltage being connected with the first relay coil J1 is 24V；It is appreciated that in other embodiments, it should
Power supply can also be the voltage of other sizes, as long as the closure of relay line contact can be realized by the voltage.
In one embodiment, referring to Fig. 3, feedback measuring circuit 300 includes starting state measuring circuit 310 and movement
State measuring circuitry 320, starting state measuring circuit 310 connect programmable logic device, and starting state measuring circuit 310 connects
The cathode of first rectifier diode D1, action state measuring circuit 320 connect programmable logic device, action state measuring circuit
The cathode of 320 the second rectifier diode D2 of connection.
Specifically, starting state measuring circuit 310 and action state measuring circuit 320 respectively with starting optocoupler output circuit
110 is corresponding with movement optocoupler output circuit 120, respectively the output signal and movement of acquisition starting optocoupler output circuit 110
The output signal of optocoupler output circuit 120, and send comparison circuit 400 for the signal collected and analyze and determine.From
And carry out subsequent blocking or normal operating conditions.
Further, in one embodiment, referring to Fig. 4, starting state measuring circuit 310 includes third current-limiting resistance
R5, third photo-coupler 311 and the first pull-up resistor R3, action state measuring circuit 320 include the 4th current-limiting resistance R6, the 4th
Photo-coupler 321 and the second pull-up resistor R4, the first pull-up resistor R3 connection power supply VCC, the first pull-up resistor R3 connection can compile
Journey logical device, open-collector gate (the Open Collector, OC of the first pull-up resistor R3 connection third photo-coupler 311
Door), one end of the phototriode B3 of third photo-coupler 311 connects the first pull-up resistor R3, the light of third photo-coupler 311
The other end of quick triode B3 is grounded, and the anode of the light emitting diode D7 of third photo-coupler 311 connects third current-limiting resistance R5
One end；The other end of third current-limiting resistance R5 connects power supply VCC, the cathode of the light emitting diode D7 of third photo-coupler 311
Connect one end of the phototriode B1 of the first photo-coupler 111, the second pull-up resistor R4 connection power supply VCC, the second pull-up electricity
Hinder R4 connection programmable logic device, the open-collector gate of the 4th photo-coupler 321 of the second pull-up resistor R4 connection, the 4th light
One end of the phototriode B4 of coupler 321 connects the second pull-up resistor R4, the phototriode B4 of the 4th photo-coupler 321
Other end ground connection, the anode of the light emitting diode D8 of the 4th photo-coupler 321 connects one end of the 4th current-limiting resistance R6, the 4th
The other end of current-limiting resistance R6 connects power supply VCC, and the cathode of the light emitting diode D8 of the 4th photo-coupler 321 connects the second optocoupler
One end of the phototriode B2 of clutch 121.
Specifically, the first pull-up resistor R3 and the second pull-up resistor R4 are separately connected power supply VCC, then respectively with third light
The open-collector gate of coupler 311 and the 4th photo-coupler 321, while the first pull-up resistor R3 and the second pull-up resistor R4 are also
The function of current limiting, respectively third photo-coupler 311 and the 4th photo-coupler 321 provide power supply, enable signal respectively can be from
The light emitting diode D7 of third photo-coupler 311 and the light emitting diode D8 of the 4th photo-coupler 321 are sent to comparison circuit
400.The cathode of the light emitting diode D7 of third photo-coupler 311 connects the one of the phototriode B1 of the first photo-coupler 111
End, the cathode of the light emitting diode D8 of the 4th photo-coupler 321 connect the one of the phototriode B2 of the second photo-coupler 121
End, the output signal of acquisition starting optocoupler output circuit 110 and movement optocoupler output circuit 120, passes through third light respectively respectively
Coupler 311 and the 4th photo-coupler 321 are sent to comparison circuit 400 and are judged.It is appreciated that in other embodiments,
Third photo-coupler 311 and the 4th photo-coupler 321 are also possible to no OC of LMDS Light Coupled Device, when light emitting diode and light
Conducting can transfer signals to comparison circuit 400 between quick triode.It should be pointed out that in one embodiment, with the
One pull-up resistor R3 is 3.3V with the second pull-up resistor R4 supply voltage connecting, with third current-limiting resistance R5 and the 4th current limliting
The supply voltage of resistance R6 connection is 24V.It is appreciated that in other embodiments, being connect with third, the 4th current-limiting resistance
Power supply and the power supply being connected with the first, second pull-up resistor can also be the power supply of other sizes.In one embodiment,
The collector of the phototriode B3 of three photo-couplers 311 connects the first pull-up resistor R3, and photosensitive the three of third photo-coupler 311
The emitter of pole pipe B3 is grounded, and the collector of the phototriode B4 of the 4th photo-coupler 321 connects the second pull-up resistor R4, the
The emitter of the phototriode B4 of four photo-couplers 321 is grounded.
Further, in one embodiment, referring to Fig. 5, when the signal judgement starting based on the received of comparison circuit 400
When 1 → 0 or 0 → 1 displacement occurs for signal or action signal, detects corresponding feedback measuring state and need to escape optocoupler output circuit
The transmission delay time of 100 LMDS Light Coupled Device and the LMDS Light Coupled Device of feedback measuring circuit 300.Enabling signal is occurring or is moving
When making the displacement of signal 1 → 0 or 0 → 1, the control 50 μ s timers of starting of comparison circuit 400, when timer does not count the full time, no
Compare the corresponding states for receiving signal and corresponding measuring signal；When timer then after, enter back into normal logic judgment process.
In one embodiment, optocoupler output circuit 120, action control switch circuit 200 and action state measurement are acted
The quantity of circuit 320 is two or more, and acts optocoupler output circuit 120, action control switch circuit 200 and move
The quantity for making state measuring circuitry 320 is consistent.
Specifically, in order to meet the needs of more multiple exit, movement optocoupler output circuit 120, action control can also be opened
The quantity of powered-down road 200 and action state measuring circuit 320 is set as multiple, and specifically number can carry out according to the actual situation
Adjustment, multiple movement optocoupler output circuits 120, multiple action control switch circuits 200 and multiple action state measuring circuits 320
It corresponds, 120, action control switch electricity of a movement optocoupler output circuit in specific connection relationship such as above-described embodiment
Road 200 connects one to one consistent with an action state measuring circuit 320, repeats no more.Multiple action control switch circuits
200 power supply is activated the control of the corresponding contact of control switch circuit 200, and respectively can independently realize blocking function, i.e.,
The connection with external equipment is disconnected by control contact.
Further, in one embodiment, the resistance value of the first current-limiting resistance R1 and the second current-limiting resistance R2 are 470
The resistance value of Ω, third current-limiting resistance R5 and the 4th current-limiting resistance R6 are 3.3k Ω, the pull-up electricity of the first pull-up resistor R3 and second
The resistance value for hindering R4 is 2k Ω.First rectifier diode D1, the second rectifier diode D2, first switch diode D3 and second are opened
The diode for being all made of 1N4007 model of pass diode D4, the first photo-coupler 111 and the second photo-coupler 121 are all made of
It is the optocoupler of TLP109 that the photo-coupler of TLP127 model, third photo-coupler 311 and the 4th photo-coupler 321, which use model,
It is the relay of G6B-2214P-1-US-7 that clutch, the first relay and the second relay, which use model,；Programmable logic device
Part uses the FPGA of model EP2C5Q208.
Above-mentioned photoelectric isolating circuit, the signal that feedback measuring circuit can acquire the output of optocoupler output circuit obtain acquisition letter
Number and be sent to comparison circuit, input and output shape of the comparison circuit according to input signal and acquisition signal to optocoupler output circuit
State compares, and the output control signal control control switch electricity when the input of optocoupler output circuit and output state are inconsistent
Road disconnects, and output control signal makes control switch closing of circuit when the input of optocoupler output circuit is consistent with output state.Pass through
The signal of feedback measuring circuit acquisition optocoupler output circuit is compared with input signal, and in the input of optocoupler output circuit and
Output state is inconsistent, and control control switch circuit enters off-state, to avoid that malfunction occurs, improves Phototube Coupling electricity
The security reliability on road.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
The several embodiments of the application above described embodiment only expresses, the description thereof is more specific and detailed, but simultaneously
The limitation to claim therefore cannot be interpreted as.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the concept of this application, various modifications and improvements can be made, these belong to the protection of the application
Range.Therefore, the scope of protection shall be subject to the appended claims for the application patent.
Claims (10)
1. a kind of photoelectric isolating circuit characterized by comprising
Optocoupler output circuit；
Control switch circuit；
The signal for acquiring the optocoupler output circuit output obtains acquisition signal, and exports to the feedback of comparison circuit and measure electricity
Road；
Input signal controls the on-off of the optocoupler output circuit based on the received, receives adopting for the feedback measuring circuit output
Collect signal, and output control signals to the control switch circuit, the comparison for controlling the on-off of the control switch circuit is electric
Road；
The optocoupler output circuit connects the feedback measuring circuit, and the feedback measuring circuit connects the comparison circuit, institute
It states comparison circuit and connects the optocoupler output circuit, the optocoupler output circuit connects the control switch circuit.
2. photoelectric isolating circuit according to claim 1, which is characterized in that further include locking warning circuit, the locking
Warning circuit connects the comparison circuit.
3. photoelectric isolating circuit according to claim 2, which is characterized in that the comparison circuit includes connecting the feedback
The programmable logic device of measuring circuit and the optocoupler output circuit.
4. photoelectric isolating circuit according to claim 3, which is characterized in that the optocoupler output circuit includes starting optocoupler
Output circuit and movement optocoupler output circuit, the starting optocoupler output circuit connects the programmable logic device, described to open
Dynamic optocoupler output circuit connects the control switch circuit, and the starting optocoupler output circuit connects the feedback measuring circuit,
The movement optocoupler output circuit connects the programmable logic device, and the movement optocoupler output circuit connection control is opened
Powered-down road, the movement optocoupler output circuit connect the feedback measuring circuit.
5. photoelectric isolating circuit according to claim 4, which is characterized in that the starting optocoupler output circuit includes first
Current-limiting resistance, the first rectifier diode and the first photo-coupler, the movement optocoupler output circuit include the second current-limiting resistance, the
Two rectifier diodes and the second photo-coupler,
One end of first current-limiting resistance and one end of second current-limiting resistance are all connected with power supply, first current-limiting resistance
The other end connect first photo-coupler light emitting diode anode, the light emitting diode of first photo-coupler
Cathode connects the programmable logic device, one end connection of the phototriode of first photo-coupler first rectification
The anode of the cathode of diode, first rectifier diode connects the control switch circuit, second photo-coupler
The other end of phototriode is grounded；The other end of second current-limiting resistance connects the light-emitting diodes of second photo-coupler
The cathode of the anode of pipe, the light emitting diode of second photo-coupler connects the programmable logic device, second light
One end of the phototriode of coupler connects the control switch circuit, the phototriode of second photo-coupler it is another
One end ground connection.
6. photoelectric isolating circuit according to claim 5, which is characterized in that the control switch circuit includes starting control
Switching circuit and action control switch circuit, action control switch circuit described in the starting control switch circuit connection are described
The anode for starting the first rectifier diode described in control switch circuit connection, second described in the action control switch circuit connection
The anode of rectifier diode.
7. photoelectric isolating circuit according to claim 6, which is characterized in that the control switch circuit is relay electricity
Road, the starting control switch circuit include first switch diode, the first relay coil and the first relay contact, described
Action control switch circuit includes second switch diode, the second relay coil and the second relay contact,
The anode of the first switch diode connects the anode of first rectifier diode, the first switch diode
Cathode connects one end of first relay coil, the other end connection of first relay coil first rectification two
The anode of pole pipe, one end of first relay coil connect power supply, the first relay contact connection described second after
One end of electric apparatus coil；The anode of the second switch diode connects the anode of second rectifier diode, and described second
The cathode of switching diode connects one end of second relay coil, and the other end of second relay coil connects institute
State the anode of the second rectifier diode, the connection external equipment of second relay contact.
8. photoelectric isolating circuit according to claim 7, which is characterized in that the feedback measuring circuit includes starting state
Measuring circuit and action state measuring circuit, the starting state measuring circuit connects the programmable logic device, described to open
Dynamic state measuring circuitry connects the cathode of first rectifier diode, and the action state measuring circuit connection is described programmable
Logical device, the action state measuring circuit connect the cathode of second rectifier diode.
9. photoelectric isolating circuit according to claim 8, which is characterized in that the starting state measuring circuit includes third
Current-limiting resistance, third photo-coupler and the first pull-up resistor, the action state measuring circuit include the 4th current-limiting resistance, the 4th
Photo-coupler and the second pull-up resistor,
The first pull-up resistor connection power supply, the first pull-up resistor connection programmable logic device, described first
Pull-up resistor connects the open-collector gate of the third photo-coupler, one end of the phototriode of the third photo-coupler
Connect first pull-up resistor, the other end ground connection of the phototriode of the third photo-coupler, the third optical coupling
The anode of the light emitting diode of device connects one end of the third current-limiting resistance, and the other end of the third current-limiting resistance connects electricity
Source, the cathode of the light emitting diode of the third photo-coupler connect one end of the phototriode of first photo-coupler；
Second pull-up resistor connects power supply, and second pull-up resistor connects the programmable logic device, second pull-up
Resistance connects the open-collector gate of the 4th photo-coupler, one end connection of the phototriode of the 4th photo-coupler
Second pull-up resistor, the other end ground connection of the phototriode of the 4th photo-coupler, the 4th photo-coupler
The anode of light emitting diode connects one end of the 4th current-limiting resistance, and the other end of the 4th current-limiting resistance connects power supply,
The cathode of the light emitting diode of 4th photo-coupler connects one end of the phototriode of second photo-coupler.
10. photoelectric isolating circuit according to claim 8, which is characterized in that the movement optocoupler output circuit, described dynamic
The quantity for making control switch circuit and the action state measuring circuit is two or more, and the movement optocoupler is defeated
Circuit, the action control switch circuit are consistent with the quantity of the action state measuring circuit out.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821008295.7U CN208270637U (en) | 2018-06-27 | 2018-06-27 | Photoelectric isolating circuit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821008295.7U CN208270637U (en) | 2018-06-27 | 2018-06-27 | Photoelectric isolating circuit |
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| CN208270637U true CN208270637U (en) | 2018-12-21 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111505364A (en) * | 2020-04-25 | 2020-08-07 | 搜派师自动化科技有限公司 | Intelligent variable-frequency electric actuating mechanism capable of being used for high-intensity magnetic field and diamagnetic method |
-
2018
- 2018-06-27 CN CN201821008295.7U patent/CN208270637U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111505364A (en) * | 2020-04-25 | 2020-08-07 | 搜派师自动化科技有限公司 | Intelligent variable-frequency electric actuating mechanism capable of being used for high-intensity magnetic field and diamagnetic method |
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| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20191008 Address after: 210012 No. 6 Fenghui Avenue, Yuhua Economic Development Zone, Yuhuatai District, Nanjing City, Jiangsu Province Co-patentee after: POWER DISPATCH CONTROL CENTER, GUANGDONG POWER GRID CO., LTD. Patentee after: Jiangsu Huaruitai Technology Co., Ltd. Address before: 210012 No. 6 Fenghui Avenue, Yuhua Economic Development Zone, Yuhuatai District, Nanjing City, Jiangsu Province Co-patentee before: Guangdong Power Grid Co., Ltd. Power Dispatching Control Center Patentee before: Jiangsu Huaruitai Technology Co., Ltd. Co-patentee before: Wu Guobing |
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| TR01 | Transfer of patent right |