CN206248742U - Multi-way switching values signal pickup assembly and its on-off model Acquisition Circuit - Google Patents
Multi-way switching values signal pickup assembly and its on-off model Acquisition Circuit Download PDFInfo
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- CN206248742U CN206248742U CN201621266134.9U CN201621266134U CN206248742U CN 206248742 U CN206248742 U CN 206248742U CN 201621266134 U CN201621266134 U CN 201621266134U CN 206248742 U CN206248742 U CN 206248742U
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Abstract
The utility model is related to a kind of on-off model Acquisition Circuit of multi-way switching values signal pickup assembly, including the first voltage-stabiliser tube, the second voltage-stabiliser tube, first resistor, second resistance, switching tube and optocoupler.The control end and the negative electrode of the second voltage-stabiliser tube of first resistor and second resistance series connection and common port connecting valve pipe, the first resistor other end connects the anode of the first voltage-stabiliser tube, the anode of the positive pole of the negative electrode connection remote signalling power supply of the first voltage-stabiliser tube, the second resistance other end and the second voltage-stabiliser tube is all connected with the negative pole of remote signalling power supply.One end of the control unit of the input connection optocoupler of switching tube, the output end of switching tube connects the negative pole of remote signalling power supply, the other end of the control unit of optocoupler connects the positive pole of remote signalling power supply, and controlled portion one end of optocoupler connects the processor of multi-way switching values signal pickup assembly, other end ground connection.Output voltage control optocoupler according to remote signalling power supply is reliably turned on and reliable turn-off, it is to avoid is collected the on-off model of mistake, is improve signal acquisition accuracy.
Description
Technical field
The utility model is related to data acquisition technology field, more particularly to a kind of multi-way switching values signal pickup assembly and
Its on-off model Acquisition Circuit.
Background technology
Distribution automation measure and control device needs collection breaker point, conjunction, non-energy storage state, local shift knob state, electricity
The on-off models such as source module state, cell activation state.Switch acquisition way is more while needing according to actually used need
Increase or reduce the way of switch acquisition, the switching value of collection is passive bus, the remote signalling power supply of switch acquisition
There is provided by distribution automation measure and control device.
Traditional multi-way switching values signal acquisition circuit is to access multi-way switching values signal by same acquisition chip to enter
Row collection.Distribution automation measure and control device is excessive in operating breaker and load current and installation's power source is dry by external world EMC
When disturbing, installation's power source occurs the situation of fluctuation, and traditional multi-way switching values signal acquisition circuit occurs collection switching value letter
The phenomenon of number mistake, haves the shortcomings that signal acquisition accuracy is low.
Utility model content
Based on this, it is necessary to regarding to the issue above, there is provided a kind of multi-way switching values letter for improving signal acquisition accuracy
Number harvester and its on-off model Acquisition Circuit.
A kind of on-off model Acquisition Circuit of multi-way switching values signal pickup assembly, including it is the first voltage-stabiliser tube, second steady
Pressure pipe, first resistor, second resistance, switching tube and optocoupler,
The first resistor and second resistance series connection and common port connect the control end and described the of the switching tube
The negative electrode of two voltage-stabiliser tubes, the first resistor other end connects the anode of first voltage-stabiliser tube, the moon of first voltage-stabiliser tube
The anode of the positive pole of pole connection remote signalling power supply, the second resistance other end and second voltage-stabiliser tube is all connected with the remote signalling electricity
The negative pole in source；The input of the switching tube connects one end of the control unit of the optocoupler, the output end connection of the switching tube
The negative pole of the remote signalling power supply, the other end of the control unit of the optocoupler connects the positive pole of the remote signalling power supply, the optocoupler
Controlled portion one end connects the processor of multi-way switching values signal pickup assembly, other end ground connection；
The switching tube is in when the output voltage of the remote signalling power supply is more than the first percentage of default rated voltage
Saturation state, when the output voltage of the remote signalling power supply is less than the second percentage of the default rated voltage in cut-off shape
State；First percentage is more than second percentage.
A kind of multi-way switching values signal pickup assembly, including processor and multiple above-mentioned on-off model Acquisition Circuits, respectively
The controlled portion of optocoupler connects the processor in the on-off model Acquisition Circuit.
Above-mentioned multi-way switching values signal pickup assembly and its on-off model Acquisition Circuit, switching tube is in the defeated of remote signalling power supply
Go out when voltage is more than the first percentage of default rated voltage and be in saturation state, optocoupler is reliably turned on；Switching tube is in remote signalling
The output voltage of power supply is in cut-off state when being less than the second percentage of default rated voltage, makes optocoupler reliable turn-off.According to
The output voltage of remote signalling power supply is reliably turned on and reliable turn-off with the relation control optocoupler of default rated voltage, realizes Width funtion model
Collection is enclosed, and avoids collecting the on-off model of mistake, improve signal acquisition accuracy.On-off model Acquisition Circuit is adopted
Discrete element is used, the reliable of the direct controlling switch pipe of the virtual voltage according to remote signalling power supply turns on and reliable turn-off, while
The control unit of optocoupler increased current amplification circuit, can effectively reduce remote signalling power supply power consumption.
Brief description of the drawings
Fig. 1 is the schematic diagram of multi-way switching values signal pickup assembly and its on-off model Acquisition Circuit in an embodiment；
Fig. 2 is the structure chart of multi-way switching values signal pickup assembly in an embodiment；
Fig. 3 is the schematic diagram of level shifting circuit in an embodiment.
Specific embodiment
In one embodiment, a kind of on-off model Acquisition Circuit of multi-way switching values signal pickup assembly, such as Fig. 1 institutes
Show, including the first voltage-stabiliser tube Z1, the second voltage-stabiliser tube Z2, first resistor R1, second resistance R2, switching tube Q1 and optocoupler T1,
First resistor R1 and second resistance R2 series connection and the control end and the second voltage-stabiliser tube Z2 of common port connecting valve pipe Q1
Negative electrode, the first resistor R1 other ends connect the first voltage-stabiliser tube Z1 anode, the first voltage-stabiliser tube Z1 negative electrode connection remote signalling power supply
Positive pole, be connected with the positive pole of remote signalling power supply especially by port SwitchSignal_In, the second resistance R2 other ends and second
The anode of voltage-stabiliser tube Z2 is all connected with the negative pole of remote signalling power supply, is connected with the negative pole of remote signalling power supply especially by port Com.Switching tube
One end of the control unit of the input connection optocoupler T1 of Q1, the output end of switching tube Q1 connects the negative pole of remote signalling power supply, same logical
Port Com is crossed to be connected with the negative pole of remote signalling power supply.The other end of the control unit of optocoupler T1 connects the positive pole of remote signalling power supply, same logical
Port SwitchSignal_In is crossed to be connected with the positive pole of remote signalling power supply.Controlled portion one end connection multi-way switching values letter of optocoupler T1
The processor of number harvester, is connected especially by port SwitchSignal_Out with processor, the controlled portion of optocoupler T1
The other end is grounded.
Switching tube Q1 is in saturation shape when the output voltage of remote signalling power supply is more than the first percentage of default rated voltage
State, makes optocoupler T1 reliably turn on；It is in when the output voltage of remote signalling power supply is less than the second percentage of default rated voltage and is cut
Only state, makes optocoupler T1 reliable turn-offs；First percentage is more than the second percentage.
First voltage-stabiliser tube Z1, the second voltage-stabiliser tube Z2, first resistor R1 and second resistance R2 are provided for the conducting of switching tube Q1
Bias voltage.The type of switching tube Q1 is not unique, can be that triode can also be metal-oxide-semiconductor, in the present embodiment, switching tube Q1
It is NPN type triode, used as control end, used as input, emitter stage is used as output end for colelctor electrode for base stage.Default rated voltage
Value is not unique, can be 24V, 48V, 110V or 220V, or other magnitudes of voltage.
The model of the second voltage-stabiliser tube Z2, second resistance R2 and optocoupler T1 is not unique, in the present embodiment, the second voltage-stabiliser tube Z2
It is KDZ5.1B voltage-stabiliser tubes, the resistance of second resistance R2 is 1M ohm, and optocoupler T1 is TLP185-GB optocouplers.First percentage and
The specific value of two percentages is not also unique, specifically can be by changing the first voltage-stabiliser tube Z1, first resistor R1 and switching tube Q1
Specifications parameter be adjusted, in the present embodiment, the first voltage-stabiliser tube Z1 be ISMB5927B voltage-stabiliser tubes, the resistance of first resistor R1
It it is 3.3K ohm, switching tube Q1 is 2SC5201 triodes, the first percentage is 70%, and the second percentage is 55%.Switching tube Q1
Reliable conducting when the output voltage of remote signalling power supply is more than the 70% of default rated voltage for optocoupler T1 provides enough IF electric currents,
It is the reliable turn-off control IF electric currents of optocoupler T1 to be less than the 55% of default rated voltage in the output voltage of remote signalling power supply.Wherein,
IF electric currents are the primary current of optocoupler T1.Optocoupler T1 is isolated for switch amount signal, increases the anti-dry of switch acquisition
Disturb ability.
In one embodiment, on-off model Acquisition Circuit also includes counnter attack diode D1 and transient diode TVS1,
The anode of counnter attack diode D1 connects the positive pole of remote signalling power supply, especially by port SwitchSignal_In and remote signalling power supply
Positive pole is connected.Negative electrode, the negative electrode and optocoupler of the first voltage-stabiliser tube Z1 of the negative electrode connection transient diode TVS1 of counnter attack diode D1
The control unit of T1, the anode of transient diode TVS1 connects the negative pole of remote signalling power supply, especially by port Com and remote signalling power supply
Negative pole is connected.
The type of counnter attack diode D1 and transient diode TVS1 is not unique, and in the present embodiment, counnter attack diode D1 is
M7 diodes, transient diode TVS1 is SMBJ30A diodes.Counnter attack diode D1 and transient diode TVS1 composition switching values
The leading portion protection circuit of signal acquisition circuit, the effectively component of protection circuit rear end, from the damage to surge pulse.
In one embodiment, on-off model Acquisition Circuit also includes 3rd resistor R3 and the first electric capacity C1, the first electricity
The common port of R1 and second resistance R2 is hindered by the control end of 3rd resistor R3 connecting valve pipes Q1, the connection of first electric capacity C1 one end
The control end of switching tube Q1, the other end connects the negative pole of remote signalling power supply, and the negative pole again by port Com and remote signalling power supply connects
Connect.The LPF of 3rd resistor R3 and the first electric capacity C1 compositions, prevents the control end of switching tube Q1 from being done by spike burr
Disturb, improve the break-make control reliability of switching tube Q.In the present embodiment, 3rd resistor R3 is 10K ohm of resistance, the first electric capacity
C1 is the electric capacity of 100pF.
In one embodiment, on-off model Acquisition Circuit also includes the 4th resistance R4 and the 5th resistance R5, optocoupler T1
Control unit by the 4th resistance R4 connect remote signalling power supply positive pole, especially by port SwitchSignal_In and remote signalling electricity
The positive pole connection in source.The output end of switching tube Q1 connects the negative pole of remote signalling power supply by the 5th resistance R5, especially by port Com
It is connected with the negative pole of remote signalling power supply.4th resistance R4 and the 5th resistance R5 plays adjustment switching tube Q1 magnifying states and remote signalling loop point
The effect of pressure.In the present embodiment, the 4th resistance R4 and the 5th resistance R5 is 10K ohm of resistance.
Further, on-off model Acquisition Circuit can simultaneously include counnter attack diode D1, transient diode TVS1, the 4th
The control unit of resistance R4 and the 5th resistance R5, optocoupler T1 connects the negative electrode of counnter attack diode D1, counnter attack two by the 4th resistance R4
The anode of pole pipe D1 is connected by port SwitchSignal_In with the positive pole of remote signalling power supply.
Wherein in one embodiment, with continued reference to Fig. 1, on-off model Acquisition Circuit also includes the 6th resistance R6 and the
The controlled portion of two electric capacity C2, optocoupler T1 is connected power access end with the common port of processor by the 6th resistance R6, and by
Two electric capacity C2 are grounded.6th resistance R6 is used to adjust the size of optocoupler T1 output currents so that energy saturation is led when optocoupler T1 is turned on
Logical, in the present embodiment, the 6th resistance R6 connects the power access end of positive 5V, uses 5V pull-up power supplies to improve signal transmission between plate
Antijamming capability and driving force.Second electric capacity C2 is decoupling filter capacitor, for carrying out signal filtering, improves signal transmission
Reliability.In the present embodiment, the 6th resistance R6 is 22K ohm of resistance, and the second electric capacity C2 is the electric capacity of 100nF.
The on-off model Acquisition Circuit of above-mentioned multi-way switching values signal pickup assembly, according to the output voltage of remote signalling power supply
Relation control optocoupler T1 with default rated voltage is reliably turned on and reliable turn-off, realizes that wide-voltage range is gathered, and avoid adopting
Collect the on-off model of mistake, improve signal acquisition accuracy.On-off model Acquisition Circuit uses discrete element, root
According to the reliable conducting of the direct controlling switch pipe of the virtual voltage of remote signalling power supply and reliable turn-off, while be increased in optocoupler control unit
Current amplification circuit, can effectively reduce remote signalling power supply power consumption.
In one embodiment, a kind of multi-way switching values signal pickup assembly, can be used for distribution automation measure and control device
Multi-way switching values signal acquisition.As shown in Fig. 2 multi-way switching values signal pickup assembly includes that processor MCU is above-mentioned with multiple opening
Signal acquisition circuit 100 is measured in pass, and the controlled portion connection processor MCU of optocoupler, specifically leads in each on-off model Acquisition Circuit 100
Port SwitchSignal_Out is crossed to be connected with processor MCU.On-off model Acquisition Circuit 100 can be by port
SwitchSignal_In is connected with the positive pole DC+ of remote signalling power supply, is connected with the negative pole DC- of remote signalling power supply by port Com.
The modularization of on-off model Acquisition Circuit 100, the quantity of on-off model Acquisition Circuit 100 can be adopted according to required
The quantity of the on-off model of collection is increased or is reduced, and scalability is strong.Each way switch amount signal acquisition circuit 100 will be adopted
The on-off model that collection is obtained is concentrated and sent to processor MCU.
Above-mentioned multi-way switching values signal pickup assembly, the relation of output voltage according to remote signalling power supply and default rated voltage
Control optocoupler is reliably turned on and reliable turn-off, realizes that wide-voltage range is gathered, and avoids collecting the on-off model of mistake, is carried
Signal acquisition accuracy high.On-off model Acquisition Circuit uses discrete element, and the virtual voltage according to remote signalling power supply is straight
Reliable conducting and the reliable turn-off of controlling switch pipe are connect, realizes, per power consumption≤100mVA all the way, can effectively reducing remote signalling power supply work(
Consumption.
In one embodiment, with continued reference to Fig. 2, multi-way switching values signal pickup assembly also includes being adopted with on-off model
The quantity identical controlling switch of collector 100, each on-off model Acquisition Circuit 100 is connected by one controlling switch of correspondence respectively
The positive pole DC+ of remote signalling power supply.Specifically, controlling switch include switch K1 ..., switch Kn-1 and switch Kn, each switching value letter
Number Acquisition Circuit 100 connects one end of one controlling switch of correspondence, the other end of controlling switch by port SwitchSignal_In
Connect the positive pole DC+ of remote signalling power supply.Signal acquisition control is carried out to corresponding on-off model Acquisition Circuit 100 by controlling switch
System, improves operation ease.
In one embodiment, multi-way switching values signal pickup assembly also includes being counted with on-off model Acquisition Circuit 100
Amount identical level shifting circuit 210, each on-off model Acquisition Circuit 100 is respectively by one level shifting circuit 210 of correspondence
Connection processor MCU.Specifically, each on-off model Acquisition Circuit 100 connects correspondence by port SwitchSignal_Out
The input In of level shifting circuit 210, the port I/O of the output end OUT connection processors MCU of level shifting circuit 210.
When multi-way switching values signal pickup assembly is used for distribution automation measure and control device, due to distribution automation observing and controlling dress
Put used MCU (Micro Controller Unit, Chinese is micro-control unit) power supply and be 3.3V systems.It is logical
The signal of 210 pairs of correspondence outputs of level shifting circuit 210 of over level change-over circuit carries out level conversion, with processor MCU level
It is compatible to receive signal in order to processor MCU, improve signal acquisition convenience.
In one embodiment, as shown in figure 3, level shifting circuit 210 include level translator U1, the 7th resistance R7 and
The power end VCC connection power access ends of the 3rd electric capacity C3, level translator U1, specifically connect the power access end of positive 5V, and
It is grounded by the 3rd electric capacity C3, the earth terminal GND ground connection of level translator U1, the input A/B of level translator U1 is used as electricity
The input IN of flat change-over circuit 210, connects corresponding on-off model Acquisition Circuit 100, the output end Y of level translator U1
Processor MCU is connected as the output end OUT of level shifting circuit 210, and power access end, tool are connected by the 7th resistance R7
Body connects the power access end of positive 3.3V.
Level translator U1, the 7th resistance R7 and the 3rd electric capacity C3 particular type and parameter it is not unique, the present embodiment
In, level translator U1 is SN74LVC1G07DCK chips, and the 7th resistance R7 is 10K ohm of resistance, and the 3rd electric capacity C3 is
The electric capacity of 100nF.
Each technical characteristic of embodiment described above can be combined arbitrarily, to make description succinct, not to above-mentioned reality
Apply 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, the scope of this specification record is all considered to be.
Embodiment described above only expresses several embodiments of the present utility model, and its description is more specific and detailed,
But therefore can not be interpreted as the limitation to utility model patent scope.It should be pointed out that for the common skill of this area
For art personnel, without departing from the concept of the premise utility, various modifications and improvements can be made, these are belonged to
Protection domain of the present utility model.Therefore, the protection domain of the utility model patent should be determined by the appended claims.
Claims (10)
1. a kind of on-off model Acquisition Circuit of multi-way switching values signal pickup assembly, it is characterised in that including the first voltage stabilizing
Pipe, the second voltage-stabiliser tube, first resistor, second resistance, switching tube and optocoupler,
The first resistor and second resistance series connection and common port connect the control end of the switching tube and described second steady
The negative electrode of pressure pipe, the first resistor other end connects the anode of first voltage-stabiliser tube, and the negative electrode of first voltage-stabiliser tube connects
Connect the positive pole of remote signalling power supply, the anode of the second resistance other end and second voltage-stabiliser tube is all connected with the remote signalling power supply
Negative pole；The input of the switching tube connects one end of the control unit of the optocoupler, and the output end connection of the switching tube is described
The negative pole of remote signalling power supply, the other end of the control unit of the optocoupler connects the positive pole of the remote signalling power supply, the optocoupler it is controlled
Portion one end connects the processor of multi-way switching values signal pickup assembly, other end ground connection；
The switching tube is in saturation when the output voltage of the remote signalling power supply is more than the first percentage of default rated voltage
State, cut-off state is in when the output voltage of the remote signalling power supply is less than the second percentage of the default rated voltage；
First percentage is more than second percentage.
2. the on-off model Acquisition Circuit of multi-way switching values signal pickup assembly according to claim 1, its feature exists
In also including counnter attack diode and transient diode, the anode of the counnter attack diode connects the positive pole of the remote signalling power supply, institute
The negative electrode for stating counnter attack diode connects negative electrode, the control of the negative electrode and the optocoupler of first voltage-stabiliser tube of the transient diode
Portion processed, the anode of the transient diode connects the negative pole of the remote signalling power supply.
3. the on-off model Acquisition Circuit of multi-way switching values signal pickup assembly according to claim 1, its feature exists
In also including 3rd resistor and the first electric capacity, the common port of the first resistor and the second resistance is by the described 3rd electricity
The control end of the resistance connection switching tube, described first electric capacity one end connects the control end of the switching tube, other end connection institute
State the negative pole of remote signalling power supply.
4. the on-off model Acquisition Circuit of multi-way switching values signal pickup assembly according to claim 1, its feature exists
In also including the 4th resistance and the 5th resistance, the control unit of the optocoupler connects the remote signalling power supply by the 4th resistance
Positive pole, the output end of the switching tube passes through the negative pole that the 5th resistance connects the remote signalling power supply.
5. the on-off model Acquisition Circuit of multi-way switching values signal pickup assembly according to claim 1, its feature exists
In also including the 6th resistance and the second electric capacity, the controlled portion of the optocoupler passes through the described 6th with the common port of the processor
Resistance connects power access end, and by second capacity earth.
6. the on-off model collection of the multi-way switching values signal pickup assembly according to claim 1-5 any one is electric
Road, it is characterised in that the switching tube is NPN type triode.
7. a kind of multi-way switching values signal pickup assembly, it is characterised in that including processor and multiple as claim 1-6 are any
On-off model Acquisition Circuit described in one, the controlled portion of optocoupler connects the place in each on-off model Acquisition Circuit
Reason device.
8. multi-way switching values signal pickup assembly according to claim 7, it is characterised in that also including with the switching value
Signal acquisition circuit quantity identical controlling switch, each on-off model Acquisition Circuit is respectively by one controlling switch of correspondence
Connect the positive pole of the remote signalling power supply.
9. multi-way switching values signal pickup assembly according to claim 7, it is characterised in that also including with the switching value
Signal acquisition circuit quantity identical level shifting circuit, each on-off model Acquisition Circuit is respectively by one level of correspondence
Change-over circuit connects the processor.
10. multi-way switching values signal pickup assembly according to claim 9, it is characterised in that the level shifting circuit
Including level translator, the 7th resistance and the 3rd electric capacity, the power end connection power access end of the level translator, and pass through
3rd capacity earth, the earth terminal ground connection of the level translator, the input connection of the level translator is corresponding
On-off model Acquisition Circuit, the output end of the level translator connects the processor, and is connected by the 7th resistance
Connect power access end.
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| CN201621266134.9U CN206248742U (en) | 2016-11-24 | 2016-11-24 | Multi-way switching values signal pickup assembly and its on-off model Acquisition Circuit |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107590983A (en) * | 2017-10-18 | 2018-01-16 | 江苏诺圣医疗科技有限公司 | A kind of wireless floor push |
| CN109406864A (en) * | 2018-11-12 | 2019-03-01 | 山东鲁能智能技术有限公司 | Distribution network terminal board remote signalling voltage automatic identification circuit and method |
| CN109709853A (en) * | 2018-12-28 | 2019-05-03 | 川铁电气（天津）股份有限公司 | A kind of cassette drive array unit based on network switching control station |
| CN109839561A (en) * | 2017-11-27 | 2019-06-04 | 中国航空工业集团公司西安航空计算技术研究所 | A kind of switching signal Acquisition Circuit with status detection function |
| CN110136416A (en) * | 2019-04-29 | 2019-08-16 | 湖南沛科交通工程技术股份有限公司 | Wireless collection device, control system and control method including the wireless collection device |
| CN110854803A (en) * | 2019-11-20 | 2020-02-28 | 上海欣能信息科技发展有限公司 | Remote signaling signal acquisition system with function of false wiring protection alarm |
| CN111983298A (en) * | 2020-08-24 | 2020-11-24 | 南京磐能电力科技股份有限公司 | Switching value acquisition circuit and method |
| CN113485194A (en) * | 2021-07-20 | 2021-10-08 | 北京四方继保工程技术有限公司 | Remote signaling acquisition circuit for power distribution device and control method |
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2016
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107590983A (en) * | 2017-10-18 | 2018-01-16 | 江苏诺圣医疗科技有限公司 | A kind of wireless floor push |
| CN109839561A (en) * | 2017-11-27 | 2019-06-04 | 中国航空工业集团公司西安航空计算技术研究所 | A kind of switching signal Acquisition Circuit with status detection function |
| CN109839561B (en) * | 2017-11-27 | 2021-07-16 | 中国航空工业集团公司西安航空计算技术研究所 | Switching signal acquisition circuit with state detection function |
| CN109406864A (en) * | 2018-11-12 | 2019-03-01 | 山东鲁能智能技术有限公司 | Distribution network terminal board remote signalling voltage automatic identification circuit and method |
| CN109709853A (en) * | 2018-12-28 | 2019-05-03 | 川铁电气（天津）股份有限公司 | A kind of cassette drive array unit based on network switching control station |
| CN110136416A (en) * | 2019-04-29 | 2019-08-16 | 湖南沛科交通工程技术股份有限公司 | Wireless collection device, control system and control method including the wireless collection device |
| CN110854803A (en) * | 2019-11-20 | 2020-02-28 | 上海欣能信息科技发展有限公司 | Remote signaling signal acquisition system with function of false wiring protection alarm |
| CN111983298A (en) * | 2020-08-24 | 2020-11-24 | 南京磐能电力科技股份有限公司 | Switching value acquisition circuit and method |
| CN113485194A (en) * | 2021-07-20 | 2021-10-08 | 北京四方继保工程技术有限公司 | Remote signaling acquisition circuit for power distribution device and control method |
| CN113485194B (en) * | 2021-07-20 | 2022-09-30 | 北京四方继保工程技术有限公司 | Remote signaling acquisition circuit for power distribution device and control method |
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