CN206147316U - Low power consumption control circuit based on RS485 bus - Google Patents
Low power consumption control circuit based on RS485 bus Download PDFInfo
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- CN206147316U CN206147316U CN201621251620.3U CN201621251620U CN206147316U CN 206147316 U CN206147316 U CN 206147316U CN 201621251620 U CN201621251620 U CN 201621251620U CN 206147316 U CN206147316 U CN 206147316U
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Abstract
The utility model provides a low power consumption control circuit based on RS485 bus, the getting during electric side's circuit passes through RS485 bus connection's device of supplier of electricity circuit and outer machine of machine is stated the supplier of electricity circuit and is included first relay, first communication unit and second newsletter unit in being applied to, gets electric side's circuit and includes that second relay, third communication unit, fourth communication unit and main power source awaken the unit up. Through above -mentioned scheme, when having solved inside and outside machine adoption RS485 bus communication, interior office closes or standby state can't cut off the condition in outer electromechanical source down again to the machine of having realized outside does not need automatic outer quick -witted main power source, the consumption of having practiced thrift the complete machine cut off of during operation.
Description
Technical field
This utility model is related to electronic circuit field, more particularly to the low power consumpting controling circuit based on RS485 buses.
Background technology
RS485 buses are due to long transmission distance, strong antijamming capability, low cost and other advantages, being widely used in industry
The fields such as control, air-conditioning.But in the prior art, if air-conditioning internal-external machine adopt RS485 bus communications, air-conditioning shutdown or
Outer electromechanical source cannot be cut off under person's waiting condition, or uncontrollable outer owner's power supply is powered, so as to outer machine is constantly in power supply
State, i.e., under air-conditioning shutdown or waiting condition, it is impossible to reduce Overall Power Consumption.Therefore it provides a kind of based on RS485 buses
Low-power-consumptiocontrol control method or circuit, become current problem demanding prompt solution.
Utility model content
The technical problems to be solved in the utility model has been to provide a kind of relay using switching supply line to realize
When interior electromechanical road and outer electromechanical road communications status or the circuit of power supply state switching are to solve outer machine using RS485 bus communications
Cannot be introduced into the problem of low power consumpting state.
The technical solution of the utility model is：Based on the low power consumpting controling circuit of RS485 buses, including by connection electricity
The interior electromechanical road controlled by interior machine panel of connection and the outer electromechanical road controlled by outer machine panel, the interior electromechanical road bag
Include the first relay for electrically connecting with the interior machine panel and and be connected on the normally-closed contact of first relay
First communication chip, on the normally opened contact of first relay fixed voltage is accessed；The outer electromechanical road includes outer with described
Machine panel and the second relay of first relay electrical connection, and second electrically connected with second relay
Communication chip and main power source wakeup unit, the main power source wakeup unit includes waking up relay, and the wake-up relay is opened
Close and access line voltage on contact, resistance two ends are connected on one group of normally-closed contact of the second relay.
Preferably, two of first communication chip transmitting-receiving pins be connected to first relay one group is normal
On closed contact, the data receiver of first communication chip, enable control end and data transmit-receive end with the interior machine control
Making sheet is electrically connected；The data sending terminal of second communication chip, enable switch terminal and data receiver with the outer machine
Panel is electrically connected.
Preferably, the interior electromechanical road includes the second communication being connected on one group of normally-closed contact of first relay
Unit, the outer electromechanical road includes the 4th communication unit being connected on one group of normally-closed contact of second relay, described
Second communication unit and the 4th communication unit are electrically connected.
Preferably, being also in series with rectifier bridge and storage capacitor list between the wake-up relay and second relay
Unit.
Preferably, the interior machine panel is also connected with the normally opened contact of first relay, to carry out to the contact
Current detecting；The outer machine panel is additionally attached between the wake-up relay and second relay, with total to communicating
Line voltage is detected.
Above-mentioned technical proposal has the advantage that or beneficial effect：By said method and circuit, solve again inside and outside
When machine adopts RS485 bus communications, interior office close or holding state under cannot cut off the situation of outer electromechanical source, it is achieved thereby that
The main power source of outer machine is automatically cut off when outer machine does not need work, the power consumption of whole machine has been saved.In addition, wake up outer in interior machine
During machine, using power supply and the switching mode for communicating, corresponding outer machine is only in communication by corresponding detection in interior machine
Internal machine is communicated under state, and this mode is more intelligent, improves the wake-up efficiency and accuracy of the external machine of interior machine.
Description of the drawings
With reference to appended accompanying drawing, more fully to describe embodiment of the present utility model.However, appended accompanying drawing is only used for
Bright and elaboration, does not constitute the restriction to this utility model scope.
Fig. 1 is that the flow process of interior electromechanical road work of this utility model based on the Low-power-consumptiocontrol control method of RS485 buses is illustrated
Figure one；
Fig. 2 is that the flow process of interior electromechanical road work of this utility model based on the Low-power-consumptiocontrol control method of RS485 buses is illustrated
Figure two；
Fig. 3 is that the flow process of outer electromechanical road work of this utility model based on the Low-power-consumptiocontrol control method of RS485 buses is illustrated
Figure；
Fig. 4 is circuit diagram of this utility model based on interior electromechanical road in the low power consumpting controling circuit of RS485 buses；
Fig. 5 is the circuit diagram on low power consumpting controling circuit China and foreign countries electromechanical road of this utility model based on RS485 buses.
Specific embodiment
Below in conjunction with the accompanying drawings this utility model is carried out based on the low power consumpting controling circuit of RS485 buses with specific embodiment
Describe in detail.
Embodiment one
This utility model provides a kind of Low-power-consumptiocontrol control method based on RS485 buses, and the method is applied to interior
In the device of machine and outer machine, such as air-conditioning.The method specifically include interior machine enter, exit low-power consumption and outer machine enter, exit it is low
The several parts of method of power consumption, are described in detail below to the method.
Based on the Low-power-consumptiocontrol control method of RS485 buses, as shown in figure 1, including step：
S11, interior machine panel exit low power consumpting state, outer machine communication are waited, if receiving the positive exact figures that outer machine sends
According to then interior machine enters normal communication, otherwise, execution step S12；
Interior electromechanical road is switched to 12V and is powered by S12, interior machine panel the first relay RY4 of control, the outer machine of interior electromechanical road direction
Main power source wakeup unit in circuit is powered, and whether machine circuital current is more than current protection value in detection, if so, into step
S14；Otherwise, into step S13；
S13, interior machine panel control the first relay RY4 and interior electromechanical road are switched to into communication state, if receive outer machine sending out
The just data sent, into normal communication；Otherwise, repeat step S12；
S14, interior machine short circuit, no longer switch to interior electromechanical road 12V and power, report communication failure.
Specifically, in the above-mentioned methods, mainly interior electromechanical road (i.e. interior machine side) exits the process of low-power consumption.It is interior first
Machine panel exits low power consumpting state, and waits standby communication data to be received.If have received within the predetermined time outer
The just data that machine sends, illustrates that outer machine has also correctly exited low-power consumption process, then interior machine enters normal communication.It is no
Then, interior electromechanical road will be switched to 12V and be powered by interior machine panel by the first relay RY4 of control, i.e. now outside machine control
Plate is powered, and then again the first relay RY4 is switched to into communication state Jing after certain hour.If now have received outer machine to send out
The just data sent, then illustrate that outer machine has logged out low-power consumption, otherwise returns execution step S12, repeats said process.
When interior electromechanical road being switched to into 12V powering, whether need to detect current supply circuit electric current more than current protection value, if
It is more than, illustrates interior machine short circuit, then interior electromechanical road is no longer switched to 12V to supply by interior machine panel by the first relay RY4
Electricity condition, and report communication failure.There is not short trouble if less than electromechanics road in equal to current protection value, then illustrating.
Wherein, in order to ensure carrying out in order for whole program process, so in step s 11, interior machine panel exits low
After power consumption state, outer machine is waited to communicate for first scheduled time, if receiving just data ability in first scheduled time again
Can determine that as normal communication, otherwise into step S12.First scheduled time is preferably 4s.In step s 12, interior electromechanics
Road is switched to after 12V powers, only to the scheduled time of host supplying power second and electromechanical in monitor in real time in second scheduled time
Road electric current.Second scheduled time is preferably 5S.In step s 13, interior electromechanical road is switched to after communication state, simply waits for leading to
Interrogated for the 3rd scheduled time, it is preferred that the 3rd scheduled time was 8S.
For further, as shown in Fig. 2 S13 specifically includes step：
S131, interior machine panel control the first relay RY4 and interior electromechanical road are switched to into communication state, if receive outer machine sending out
The just data sent, into normal communication, otherwise, execution step S132；
S132, judge whether communication failure occur, if it is not, execution step S133；Otherwise, execution step S134；
S133, judge that the first relay switching times, if so, then will be interior whether more than the first pre-determined number (preferably 3)
Electromechanical road switches to communication state, and execution step S11 is returned Jing after the 4th scheduled time (preferably 30S)；Otherwise, step is performed
Rapid S12；
S134, the first relay switching times are judged whether more than the second pre-determined number (preferably 2000 times), if not
It is, execution step S135；Otherwise, terminate；
S135, Jing after the 5th scheduled time (preferably 5min) return execution step S11.
Specifically, normal communication can't be entered after step S12, S13 is repeated 3 times, then interior machine panel control
Interior electromechanical road is switched to 485 communications by the first relay RY4, often attempts to through the 4th scheduled time wake up outer machine afterwards, i.e.,
Return execution step S11.Wherein, after each communication failure, execution step S11 is returned again to after the 5th scheduled time.
It is worthy of note that, if communication failure number of times has been more than pre-determined number, then machine or outer machine have failure in illustrating, terminate whole
Individual program.
For further, also include that the process of low-power consumption is exited on outer electromechanical road in said method, specifically, such as Fig. 3 institutes
Show, the process includes step：
Under outage condition, outer electromechanical road is connected on communication bus, when the electricity on communication bus for S21, outer machine panel
When pressure is higher than the first scheduled voltage (preferably 6V), relay RY5 adhesives, the outside machine control of main power source wakeup unit are waken up
Plate is powered, and outer machine panel completes electrification reset；
S22, the magnitude of voltage obtained according to outer machine panel, judge in electromechanics road whether still power shape in communication state
State；
S23, when interior electromechanical road is in power supply state, the uncontrollable second relay RY6 of outer machine panel switches to logical
News circuit, and repeat execution step S22；When interior electromechanical road is in communication state, outer machine panel controls the second relay RY6
Communication line is switched to, starts normal communication.
Specifically, when outer electromechanical road is in low-power consumption, wake up relay RY5 and disconnect, and the second relay RY6 connects
On normally-closed contact (i.e. power supply contact), whole outer electromechanics road is in off-position.So powering when interior electromechanical road switches to 12V
Afterwards, the voltage between communication line is higher than 6V, now wakes up relay RY5 adhesives, and main power source is outwards powered on electromechanics road, outer machine control
Making sheet electrification reset.It is worthy of note that, after outer machine panel electrification reset, need to host control panel feedback data, to accuse
Know that the outer machine of host control panel has dropped out low-power consumption mode.But when exiting low power consumpting state due to interior electromechanical road, interior machine panel
Control outside machine to power the 5S that only continue, beyond machine panel need ceaselessly to monitor outer electromechanical road it is rectified after voltage it is big
It is little, to determine that now interior electromechanical road is to be in communication state in power supply state, only it is in when determining interior electromechanical road
During communication state, outer machine panel just controls the second relay RY6 and switches to 485 communication states, sets up just in interior machine panel
Normal open is interrogated.It is worthy of note that, when the voltage that outer machine panel is detected is 6V, interior electromechanics road is illustrated in power supply state,
When the voltage that outer machine panel is detected is less than 2.5V, illustrate that interior electromechanics road is in communication state.
The above-mentioned process for exiting low power consumpting state respectively for interior electromechanical road and outer electromechanical road, below internally electromechanics road and outer machine
Circuit is described in detail into the process of low power consumpting state：
1st, interior electromechanical road enters low power consumpting state：The scheduled time of off-mode the 6th is entered in interior machine panel (preferably
After 10min), into low-power consumption waiting state and continue the 7th scheduled time (preferably 10s), outside machine sends low-power consumption and waits
Signal, interior machine enters low power consumpting state, cuts off chip periphery circuit；
2nd, outer electromechanical road enters low power consumpting state：After the low-power consumption waiting signal that outer machine panel receives interior machine, enter
Enter low-power consumption waiting state, and the signal that interior machine panel sends is not received by within the 8th scheduled time (preferably 3s)
Afterwards, own power source is cut off.
By said method, solve again internal-external machine using RS485 bus communications when, interior office close or holding state under nothing
Method cuts off the situation of outer electromechanical source, it is achieved thereby that the automatically main power source of the outer machine of cut-out when outer machine does not need work, saves
The power consumption of whole machine.In addition, during interior machine wakes up outer machine, using power supply and the switching mode for communicating, accordingly
By corresponding detection, internally machine is communicated outer machine only in the case where interior machine is in communication state, and this mode is more intelligent, carries
The wake-up efficiency and accuracy of the high external machine of interior machine.
Embodiment two
According to the Low-power-consumptiocontrol control method based on RS485 buses that above-described embodiment is proposed, the present embodiment proposes one kind
Low power consumpting controling circuit based on RS485 buses.
A kind of low power consumpting controling circuit based on RS485 buses, including interior electromechanical road and outer electromechanical road, pass through between the two
Connection is connected.Separately below internally electromechanics road and outer electromechanical road are described in detail.
Interior electromechanical road is connected with interior machine panel (for the control on internally electromechanics road) and outer electromechanics road, as shown in figure 4,
Including：
First relay RY4, control end is connected with interior machine panel, and fixed power source is connected with normally opened contact, and (i.e. 12V is electric
Source), normally-closed contact is connected on two communication lines, to the working condition for switching interior electromechanical road；
First communication unit, is connected, to set up with one group of normally-closed contact and interior machine panel of the first relay RY4
Communicate between outer electromechanical road；
Second communication unit, is connected with another group of normally-closed contact of the first relay RY4, and with outer machine circuit communication.
Wherein, the first communication unit includes one first communication chip IC6, and two transmitting-receivings of first communication chip IC6 are drawn
Foot (Z pins and Y pins) is connected on one group of normally-closed contact of the first relay RY4, in the Y of the first communication chip IC6
The resistance R2 of a ground connection is also parallel between pin and the first relay RY4.Additionally, the data of the first communication chip IC6 connect
Receiving end (RO pins), enable control end (RE pins, DE pins) and data sending terminal (DI pins) are connected to interior machine control
Plate.Wherein, resistance R48 in parallel between RO pins and interior machine panel, RE pins and DE pins are also connected an earth resistance
R53, DI pin is connected on the first communication chip IC6 by series resistance R49.Pull-up resistor is connected with data sending terminal
R54, data receiver is connected with one end of pull-up resistor R55, resistance R54 and resistance R55 and accesses 5V voltages.Finally, first
The RXP pins of communication chip IC6 and TXP pins UNICOM, are connected as AB polarity switchings end with interior machine panel.
For further, interior machine panel is also connected with the communication/power switching control end of the first relay RY4, both
Between be in series with the audion Q4 of grounded emitter, and the resistance R63 being connected with audion ground level, the colelctor electrode of audion Q4
It is connected with the coil of the first relay RY4, the diode D7 of coils from parallel connection of coils one of the first relay RY4.Additionally, the first relay
The normally opened contact of RY4 is also connected with interior machine controller, interior machine controller by the current detecting to the contact, to judge interior electromechanics
Whether road electric current is more than current protection value.Also it is in series between the normally opened contact and interior machine controller of the first relay RY4 point
Current circuit, the shunt circuit by three parallel connections and be grounded resistance R44, R45 and R62 constitute.
Outer electromechanical road is connected with outer machine panel and interior electromechanical road, as shown in figure 5, specifically including：
Second relay RY6, to the working condition for switching outer electromechanical road；
3rd communication unit, is connected, to pass through with one group of normally opened contact and outer machine panel of the second relay RY6
First communication unit is set up communication and is connected with interior electromechanical road；
4th communication unit, is connected on one group of normally-closed contact of the second relay RY6, and with interior electromechanical road on second
Communication unit is electrically connected；
Main power source wakeup unit, is connected on another group of normally-closed contact of the second relay RY6, carries to outside electromechanics road
For main power source.
Specifically, the 3rd communication unit includes one second communication chip IC4, the data of second communication chip IC4
Transmitting terminal, enable switch terminal and data receiver with outer machine panel in electrical communication, and second communication chip IC4 is also with the
One communication chip IC6 is electrically connected, for setting up the communication connection on interior electromechanical road and outer electromechanical road, i.e., interior machine panel and outer machine control
Signal transmission between system is completed by the first communication chip IC6 and the second communication chip IC4.It is worthy of note that, the
One communication chip IC6 and the second communication chip IC4 are preferably 485 communication chips, and model can be MAX13089.Additionally, outer
Machine panel is also connected with the coil of the second relay RY6, communicates switching control to power supply/485 for carrying out outer electromechanical road, i.e.,
Power supply/485 communication switching control the end on whole outer electromechanics road electrically connects with outer machine panel.It is worthy of note that, the second relay
The coils from parallel connection of coils of device RY6 has a diode D22, is in series with an emitter stage between outer machine panel and the positive pole of diode D22 and connects
The audion Q3 on the ground and resistance R18 being connected with the ground level of audion Q3.
Main power source wakeup unit is described in detail below, the main power source wakeup unit includes waking up relay RY5, should
Wake up relay RY5 switch contact two ends be connected with the live wire input and fire wire output end of 220V respectively, i.e., the wake-up after
For controlling 220V main power sources, outwards whether electromechanics road powers electrical equipment RY5.Additionally, the wake-up relay RY5 and second after
Rectifier bridge and storage capacitor unit are also in series between one group of normally-closed contact of electrical equipment RY6.Wherein, rectifier bridge has four two poles
Pipe D19, D20, D9 and D18 are constituted, and storage capacitor is made up of electric capacity C21 and polarized electric capacity E21 in parallel.Additionally, outer machine control
Making sheet is additionally attached to storage capacitor unit and wakes up between relay RY5.The resistance R15 and resistance R16 of series connection and polarized electricity
Hold E21, outer machine panel is connected between resistance R15 and resistance R16, on communication bus by series resistance R21
Voltage is detected.
It is worthy of note that, interior machine panel and outer machine panel are MCU control chips, respectively to internal machine and outward
The overall work state of machine is controlled.During work, when interior machine panel exits low-power consumption working condition and wakes up outer machine control
During plate, interior machine panel controls the double-point double-throw switch of the first relay RY4 and switches to normally opened contact, will 12V plant-grid connections
On the normally opened contact of first relay RY4, now interior machine is powered by outside machine.Due to waking up relay RY5 in inductance two
Automatic pick when terminal voltage reaches 6V, so wake up relay RY5 closures main power source outwards power on electromechanics road, on outer machine panel
Reset.It is worthy of note that, after outer machine panel electrification reset, need to host control panel feedback data, to inform main frame
The outer machine of panel has dropped out low-power consumption mode.But when exiting low power consumpting state due to interior electromechanical road, interior machine panel control to
Outer machine is powered the 5S that only continue, beyond machine panel need ceaselessly to monitor outer electromechanical road it is rectified after voltage size, with
It is determined that now interior electromechanical road is to be in communication state in power supply state, only when determining interior electromechanical road in communication shape
During state, outer machine panel just controls the second relay RY6 and switches to 485 communication states, and in interior machine panel normal communication is set up.
It is worthy of note that, when the voltage that outer machine panel is detected is 6V, interior electromechanics road is illustrated in power supply state, when outer machine control
When the voltage that making sheet is detected is less than 2.5V, illustrate that interior electromechanics road is in communication state.
In addition, the double-point double-throw switch in the first relay RY4 switches to normally opened contact, will 12V plant-grid connections this
When on the normally opened contact of one relay RY4, in order to ensure the safety of whole system, interior machine panel is needed on interior electromechanical road
Current detecting end constantly measures electric current, once finding that current value is more than current protection value, then no longer switches on interior electromechanical road
12V power supply states, and report communication failure.
By foregoing circuit, solve again internal-external machine using RS485 bus communications when, interior office close or holding state under nothing
Method cuts off the situation of outer electromechanical source, it is achieved thereby that the automatically main power source of the outer machine of cut-out when outer machine does not need work, saves
The power consumption of whole machine.In addition, during interior machine wakes up outer machine, using power supply and the switching mode for communicating, accordingly
By corresponding detection, internally machine is communicated outer machine only in the case where interior machine is in communication state, and this mode is more intelligent, carries
The wake-up efficiency and accuracy of the high external machine of interior machine.
For a person skilled in the art, read after described above, various changes and modifications undoubtedly will be evident that.
Therefore, appending claims should regard the whole variations and modifications for covering true intention of the present utility model and scope as.
Any and all scope of equal value and content, are all considered as still belonging to intention of the present utility model and model in Claims scope
In enclosing.
Claims (5)
1. the low power consumpting controling circuit based on RS485 buses, is controlled including being electrically connected by RS485 buses by interior machine panel
Interior electromechanical road and by outer machine panel control outer electromechanical road, it is characterised in that the interior electromechanical road includes interior with described
Machine panel electrical connection the first relay and and be connected on the normally-closed contact of first relay first communication core
Piece, on the normally opened contact of first relay fixed voltage is accessed；The outer electromechanical road include with the outer machine panel with
And the second relay of first relay electrical connection, and the second communication chip for electrically connecting with second relay and
Main power source wakeup unit, the main power source wakeup unit includes waking up relay, connects on the switch contact of the wake-up relay
Enter line voltage, relay coil two ends are connected on one group of normally-closed contact of the second relay.
2. the low power consumpting controling circuit based on RS485 buses according to claim 1, it is characterised in that described first leads to
Two transmitting-receiving pins of news chip are connected on one group of normally-closed contact of first relay, first communication chip
Data receiver, enable control end and data transmit-receive end and electrically connect with the interior machine panel；The second communication core
The data sending terminal of piece, enable switch terminal and data receiver is electrically connected with the outer machine panel.
3. the low power consumpting controling circuit based on RS485 buses according to claim 2, it is characterised in that the interior electromechanics
Road includes the second communication unit being connected on one group of normally-closed contact of first relay, and the outer electromechanical road includes connection
The 4th communication unit on one group of normally-closed contact of second relay, second communication unit and the 4th communication
Unit is electrically connected.
4. the low power consumpting controling circuit based on RS485 buses according to claim 1, it is characterised in that the wake-up after
Rectifier bridge and storage capacitor unit are also in series between electrical equipment and second relay.
5. the low power consumpting controling circuit based on RS485 buses according to claim 1, it is characterised in that the interior machine control
Making sheet is also connected with the normally opened contact of first relay, to carry out current detecting to the contact；The outer machine panel is also
It is connected between the wake-up relay and second relay, to detect to communication bus voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621251620.3U CN206147316U (en) | 2016-11-15 | 2016-11-15 | Low power consumption control circuit based on RS485 bus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621251620.3U CN206147316U (en) | 2016-11-15 | 2016-11-15 | Low power consumption control circuit based on RS485 bus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206147316U true CN206147316U (en) | 2017-05-03 |
Family
ID=58626112
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621251620.3U Active CN206147316U (en) | 2016-11-15 | 2016-11-15 | Low power consumption control circuit based on RS485 bus |
Country Status (1)
| Country | Link |
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| CN (1) | CN206147316U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106383478A (en) * | 2016-11-15 | 2017-02-08 | 宁波奥克斯电气股份有限公司 | RS 485 bus-based low-power control method and circuit |
| CN109143838A (en) * | 2018-08-03 | 2019-01-04 | 湖南兴天电子科技有限公司 | A kind of underwater dedicated dual redundant switching circuit |
-
2016
- 2016-11-15 CN CN201621251620.3U patent/CN206147316U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106383478A (en) * | 2016-11-15 | 2017-02-08 | 宁波奥克斯电气股份有限公司 | RS 485 bus-based low-power control method and circuit |
| CN106383478B (en) * | 2016-11-15 | 2019-10-11 | 宁波奥克斯电气股份有限公司 | Low-power-consumptiocontrol control method and circuit based on RS485 bus |
| CN109143838A (en) * | 2018-08-03 | 2019-01-04 | 湖南兴天电子科技有限公司 | A kind of underwater dedicated dual redundant switching circuit |
| CN109143838B (en) * | 2018-08-03 | 2022-02-11 | 湖南兴天电子科技股份有限公司 | Special dual-redundancy switching circuit for underwater |
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