CN207741273U - Air-conditioning site monitor and monitoring air-conditioner - Google Patents
Air-conditioning site monitor and monitoring air-conditioner Download PDFInfo
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- CN207741273U CN207741273U CN201721730165.XU CN201721730165U CN207741273U CN 207741273 U CN207741273 U CN 207741273U CN 201721730165 U CN201721730165 U CN 201721730165U CN 207741273 U CN207741273 U CN 207741273U
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Abstract
A kind of air-conditioning site monitor of the utility model offer and monitoring air-conditioner, the air-conditioning site monitor includes main control module and power module, power module provides power supply for main control module, main control module includes capacitance-resistance voltage reduction circuit, communicate sample circuit, low-voltage power circuit and MAX232 communicating circuits, capacitance-resistance voltage reduction circuit provides the first power supply for communication sample circuit, low-voltage power circuit provides second source for MAX232 communicating circuits, communicate the communication signal transmitted by sample circuit reception air-conditioner controller, it communicates sample circuit and exports Transistor-Transistor Logic level signal to MAX232 communicating circuits, MAX232 communicating circuits export RS232 communication signals to host computer.The monitoring air-conditioner includes above-mentioned air-conditioning site monitor.The monitoring air-conditioner of the utility model can carry out the status information of air-conditioning to monitor and can realize multiple air-conditioning real time monitorings in real time.
Description
Technical field
The utility model is related to convertible frequency air-conditioner technical fields, more particularly, to a kind of air-conditioning site monitor and air conditioning monitoring
System.
Background technology
The characteristics of convertible frequency air-conditioner, is according to practical indoor environment, set temperature and electric current, voltage etc. are related to join
Several running frequencies to compressor are adjusted, and in the stage high frequency operation being just switched on, fast-refrigerating heating are realized, in environment temperature
When degree is close to user's set temperature, running frequency is reduced, accurate temperature controlling is realized, avoids the occurrence of sometimes hot and sometimes cold situation.
The mode of current zero firewire of convertible frequency air-conditioner generally use communication realizes the exchange of internal-external machine status information, air-conditioning
Internal-external machine only needs to be attached by four lines, this four lines are zero curve, firewire, connection and ground wire respectively, and this
Communication modes are that the zero curve and connection of internal-external machine are formed a current loop, when being sent out data, the current loop
Communication signal is converted into current signal and is exported outward, when receiving data, the receiving terminal of the current loop receives electric current letter
Number and current signal be converted into communication signal communicate.
But maintenance personal is when testing convertible frequency air-conditioner or air-conditioning maintenance, in this case it is not apparent that the shape of internal-external machine
State information, from being unable to solve the problems, such as accurately and in time.Moreover, zero firewire communication modes on order circuit only there are one
Two nodes of outer machine and an interior machine, it is not possible to connect with other nodes such as line control machine, centralized manager, remote monitoring.
Invention content
The main purpose of the utility model be to provide it is a kind of the status information of air-conditioning can be carried out real time monitoring and energy
Enough realize the air-conditioning site monitor of multiple air-conditioning real time monitorings.
The another object of the utility model is to provide a kind of monitoring that real time information can be carried out to the status information of air-conditioning
And facilitate the monitoring air-conditioner of test and the repair of air-conditioning system.
For realize above-mentioned main purpose, a kind of air-conditioning site monitor provided by the utility model, including main control module with
And power module, power module provide power supply for main control module, main control module include capacitance-resistance voltage reduction circuit, communication sample circuit,
Low-voltage power circuit and MAX232 communicating circuits, capacitance-resistance voltage reduction circuit provide the first power supply, low tension for communication sample circuit
Source circuit provides second source for MAX232 communicating circuits；The communication that sample circuit receives transmitted by air-conditioner controller is communicated to believe
Number, communication sample circuit exports Transistor-Transistor Logic level signal to MAX232 communicating circuits, and MAX232 communicating circuits turn Transistor-Transistor Logic level signal
Change RS232 communication signals into, MAX232 communicating circuits export RS232 communication signals to host computer；It includes fortune to communicate sample circuit
Calculate amplifier, multiple isolating diodes and photoisolator, the cathode of multiple isolating diodes respectively with operational amplifier
Input terminal is electrically connected, and the output end of operational amplifier is electrically connected with photoisolator.
One Preferable scheme is that, capacitance-resistance voltage reduction circuit includes step-down capacitor, zener diode, rectifier diode and puts
Resistance, discharge resistance is in parallel with step-down capacitor, and the cathode of zener diode is electrically connected with discharge resistance, and rectifier diode is just
Pole is electrically connected with step-down capacitor.
One Preferable scheme is that, low-voltage power circuit include voltage stabilizing chip, the first capacitance, the second diode, inductance with
And second capacitance, the first capacitance are electrically connected with the first input end of voltage stabilizing chip, inductance and the second diode respectively with voltage stabilizing core
The second output terminal of piece is electrically connected.
Further embodiment is that the first input end of voltage stabilizing chip receives the second voltage signal of power module output, surely
The 4th output end of chip is pressed to export low voltage signal to MAX232 communicating circuits.
Further embodiment is that MAX232 communicating circuits include MAX232 communication chips, the input of MAX232 communication chips
Pin receives Transistor-Transistor Logic level signal, and the output pin of MAX232 communication chips exports RS232 communication signals to host computer.
By said program as it can be seen that capacitance-resistance voltage reduction circuit is used to provide the voltage source needed for communication sample circuit, low tension
Source circuit is used to provide 5 volts of voltage sources needed for MAX232 communicating circuits, and communication sample circuit using zero firewire for that will be led to
The current signal that the air-conditioning internal machine or outdoor machine of air-conditioner of news are exported is converted to Transistor-Transistor Logic level signal, is then communicated again by MAX232
Transistor-Transistor Logic level signal is converted to RS232 communication signals and exported to host computer by circuit, is realized and is connected to zero firewire of internal-external machine of air-conditioning
The real time monitoring of the status information connect provides great convenience for the test and repair of air-conditioning, can quickly analyze and ask
Topic solves the problems, such as, realizes high efficiency.
Moreover, it is also possible to realize the monitoring to multi-split air conditioner, the operating status of air-conditioning is remotely supervised in real time
Control and operation.
For the another object for realizing above-mentioned, a kind of monitoring air-conditioner provided by the utility model, including at least one sky
Controller and host computer are adjusted, air-conditioning site monitor is connected between air-conditioner controller and host computer, air-conditioner controller output is logical
Signal is interrogated to air-conditioning site monitor, air-conditioning site monitor includes main control module and power module, and power module is main control module
Power supply is provided, main control module includes capacitance-resistance voltage reduction circuit, communication sample circuit, low-voltage power circuit and MAX232 communication electricity
Road, capacitance-resistance voltage reduction circuit provide the first power supply for communication sample circuit, and low-voltage power circuit provides for MAX232 communicating circuits
Two power supplys；The communication signal transmitted by sample circuit reception air-conditioner controller is communicated, communication sample circuit exports Transistor-Transistor Logic level signal
To MAX232 communicating circuits, Transistor-Transistor Logic level signal is converted into RS232 communication signals, MAX232 communication electricity by MAX232 communicating circuits
Road exports RS232 communication signals to host computer；It includes operational amplifier, multiple isolating diodes and photoelectricity to communicate sample circuit
The cathode of isolator, multiple isolating diodes is electrically connected with the input terminal of operational amplifier respectively, the output end of operational amplifier
It is electrically connected with photoisolator.
Further embodiment is that capacitance-resistance voltage reduction circuit includes step-down capacitor, zener diode, rectifier diode and electric discharge
Resistance, discharge resistance is in parallel with step-down capacitor, and the cathode of zener diode is electrically connected with discharge resistance, the anode of rectifier diode
It is electrically connected with step-down capacitor.
Further embodiment is, low-voltage power circuit include voltage stabilizing chip, the first capacitance, the second diode, inductance and
Second capacitance, the first capacitance are electrically connected with the first input end of voltage stabilizing chip, inductance and the second diode respectively with voltage stabilizing chip
Second output terminal electrical connection.
Further embodiment is that the first input end of voltage stabilizing chip receives the second voltage signal of power module output, the
4th output end of two voltage stabilizing chips exports low voltage signal to MAX232 communicating circuits.
Further embodiment is that MAX232 communicating circuits include MAX232 communication chips, the input of MAX232 communication chips
Pin receives Transistor-Transistor Logic level signal, and the output pin of MAX232 communication chips exports RS232 communication signals to host computer.
Description of the drawings
Fig. 1 is the schematic block circuit diagram of the utility model monitoring air-conditioner embodiment.
Fig. 2 is the schematic block circuit diagram of capacitance-resistance voltage reduction circuit in the utility model monitoring air-conditioner embodiment.
Fig. 3 is the circuit diagram that sample circuit is communicated in the utility model monitoring air-conditioner embodiment.
Fig. 4 is the circuit diagram of MAX232 communicating circuits in the utility model monitoring air-conditioner embodiment.
The utility model is described in further detail with reference to the accompanying drawings and embodiments.
Specific implementation mode
Air-conditioning site monitor provided by the utility model can be used for monitoring air-conditioner, such as be used in two or more
Convertible frequency air-conditioner on, also, the zero firewire communication signal that the air-conditioning site monitor of the utility model can use convertible frequency air-conditioner
RS232 communication signals are converted to, realize the real time monitoring of the status information of zero firewire of the internal-external machine connection to air-conditioning, it can also be real
Now to the monitoring of multi-split air conditioner, remote monitoring and operation are carried out to the operating status of air-conditioning in real time.
Air-conditioning site monitor embodiment：
It is the schematic block circuit diagram of the utility model monitoring air-conditioner embodiment referring to Fig. 1, Fig. 1.The utility model
Air-conditioning site monitor includes main control module 10 and power module 1, and power module 1 is that main control module 10 provides power supply, master control mould
Block 10 includes capacitance-resistance voltage reduction circuit 40, communication sample circuit 20, low-voltage power circuit 41 and MAX232 communicating circuits 30, capacitance-resistance
Reduction voltage circuit 40 is that communication sample circuit 20 provides the first power supply, and low-voltage power circuit 41 is that MAX232 communicating circuits 30 provide the
Two power supplys.For example, power module 1 can be the power supply for receiving alternating current and 220 volts of alternating current being converted into low-voltage DC.
It is the circuit theory frame of capacitance-resistance voltage reduction circuit 40 in the utility model monitoring air-conditioner embodiment referring to Fig. 2, Fig. 2
Figure.Capacitance-resistance voltage reduction circuit 40 includes step-down capacitor C1, zener diode D6, rectifier diode D7 and discharge resistance R1, electric discharge
Resistance R1 is in parallel with step-down capacitor C1, and the cathode of zener diode D6 is electrically connected with discharge resistance R1, and rectifier diode D7 is just
Pole is electrically connected with step-down capacitor C1.Discharge resistance R1 is connected in parallel on the both ends of step-down capacitor C1, for protecting circuit, zener diode
D6 is used for providing discharge loop.So capacitance-resistance voltage reduction circuit 40 voltage signal that power module 1 exports can be converted into 56 volts,
24 volts or 36 volts of DC power supplies, and for for communication sample circuit 20 modules or circuit provide required 56 volts, 24 volts
Or 36 volts of DC power supplies.
In addition, low-voltage power circuit 41 includes voltage stabilizing chip, the first capacitance, the second diode, inductance and the second capacitance,
First capacitance is electrically connected with the first input end of voltage stabilizing chip, and inductance and the second diode are exported with the second of voltage stabilizing chip respectively
End electrical connection.Wherein, the first input end of voltage stabilizing chip receives the second voltage signal that power module 1 exports, voltage stabilizing chip
4th output end exports low voltage signal to MAX232 communicating circuits 30.So what voltage stabilizing chip can export power module 1
Voltage signal is converted into 5 volts of DC power supplies, and for providing required 5 for the modules or circuit of MAX232 communicating circuits 30
Lie prostrate DC power supply.
The communication signal transmitted by the reception air-conditioner controller 2 of sample circuit 20 is communicated, communication sample circuit 20 exports TTL electricity
Transistor-Transistor Logic level signal is converted into RS232 communication signals by ordinary mail number to MAX232 communicating circuits 30, MAX232 communicating circuits 30,
MAX232 communicating circuits 30 export RS232 communication signals to host computer 3.In the present embodiment, air-conditioner controller 2 can be 1
Or 1 or more, particular number can need to be configured according to user.As it can be seen that communication sample circuit 20 can be used to acquire frequency conversion sky
Machine or zero firewire communication signal of external convertible frequency air conditioner output in adjusting, and the signal is exported to MAX232 communicating circuits 30,
MAX232 communicating circuits 30 export RS232 communication signals to host computer 3, to realize the monitoring to multi-split air conditioner, in fact
When remote monitoring and operation are carried out to the operating status of air-conditioning.
Specifically, it is the electricity that sample circuit 20 is communicated in the utility model monitoring air-conditioner embodiment referring to Fig. 3, Fig. 3
Road schematic diagram.It includes operational amplifier 21, multiple isolating diodes and photoisolator U1 to communicate sample circuit 20, it is multiple every
Cathode from diode is electrically connected with the input terminal of operational amplifier 21 respectively, and the anode of multiple isolating diodes is respectively by logical
Communication interface is electrically connected with the communication terminal of air-conditioner controller 2, and the output end of operational amplifier 21 is electrically connected with photoisolator U1.It is excellent
Selection of land is connected with divider resistance R2 and divider resistance R7 between multiple above-mentioned diodes and operational amplifier 21, it is seen then that frequency conversion is empty
Adjust interior machine or the communication signal of external convertible frequency air conditioner output after being divided by multiple diode-isolateds and divider resistance, using
The amplified communication signal of 21 output signal of operational amplifier exports Transistor-Transistor Logic level letter after photoisolator U1 light-coupled isolations
Number to MAX232 communicating circuits 30, to realize the conversion of communication signal.
It is the circuit theory of MAX232 communicating circuits 30 in the utility model monitoring air-conditioner embodiment referring to Fig. 4, Fig. 4
Figure.MAX232 communicating circuits 30 include that the input pin reception communication of MAX232 communication chips U2, MAX232 communication chip U2 is adopted
The output pin of the Transistor-Transistor Logic level signal that sample circuit 20 exports, MAX232 communication chips U2 exports RS232 communication signals to host computer
3.Therefore, MAX232 communication chips U2 can will communicate the Transistor-Transistor Logic level signal that exports of sample circuit 20 and be converted into host computer 3 and can connect
232 level signals received, alternatively, 232 level signals that MAX232 communication chips U2 can export host computer 3 are converted to communication
The Transistor-Transistor Logic level signal that sample circuit 20 can receive.So increasing zero fire of monitoring on the basis of the communication of zero firewire of internal-external machine
The air-conditioning site monitor of line status information is monitored reception to the status information of internal-external machine, and is sent to host computer, looks into real time
Data are seen and analyzed, test and repair of the user to air-conditioning are convenient to, can more in time, accurately monitor the company of internal-external machine in real time
Information is connect, realizes to the real time monitoring of air-conditioning, improves work efficiency.
So capacitance-resistance voltage reduction circuit 40 is used to provide the voltage source needed for communication sample circuit 20, low-voltage power circuit
41 for providing 5 volts of voltage sources needed for MAX232 communicating circuits 30, and communication sample circuit 20 using zero firewire for that will be led to
The current signal that the air-conditioning internal machine or outdoor machine of air-conditioner of news are exported is converted to Transistor-Transistor Logic level signal, is then communicated again by MAX232
Transistor-Transistor Logic level signal is converted to RS232 communication signals and exported to host computer 3 by circuit 30, realizes zero fire of internal-external machine to air-conditioning
The real time monitoring of the status information of line connection, provides great convenience for the test and repair of air-conditioning, can quickly divide
Analysis problem solves the problems, such as, realizes high efficiency.Moreover, it is also possible to the monitoring to multi-split air conditioner be realized, in real time to air-conditioning
Operating status carries out remote monitoring and operation.
Monitoring air-conditioner embodiment：
Monitoring air-conditioner in the present embodiment includes multiple air-conditioner controllers 2 and host computer 3, air-conditioner controller 2 with
Air-conditioning site monitor, 2 outputting communication signal of air-conditioner controller to air-conditioning site monitor, air conditioning monitoring are connected between host computer 3
Device includes main control module 10 and power module 1, and power module 1 is that main control module 10 provides power supply, and main control module 10 includes
Capacitance-resistance voltage reduction circuit 40, communication sample circuit 20, low-voltage power circuit 41 and MAX232 communicating circuits 30, capacitance-resistance voltage reduction circuit
40 provide the first power supply for communication sample circuit 20, and low-voltage power circuit 41 is that MAX232 communicating circuits 30 provide second source,
The communication signal transmitted by the reception air-conditioner controller 2 of sample circuit 20 is communicated, communication sample circuit 20 exports Transistor-Transistor Logic level signal extremely
Transistor-Transistor Logic level signal is converted into RS232 communication signals, MAX232 communications by MAX232 communicating circuits 30, MAX232 communicating circuits 30
Circuit 30 exports RS232 communication signals to host computer 3, and communication sample circuit 20 includes operational amplifier 21, two poles of multiple isolation
Pipe and photoisolator U1, multiple isolating diodes are electrically connected with the input terminal of operational amplifier 21 respectively, operational amplifier
21 output end is electrically connected with photoisolator U1.In the present embodiment, air-conditioner controller 2 can be 1 or 1 or more, tool
Body quantity can need to be configured according to user.
So capacitance-resistance voltage reduction circuit 40 is used to provide the voltage source needed for communication sample circuit 20, low-voltage power circuit
41 for providing 5 volts of voltage sources needed for MAX232 communicating circuits 30, and communication sample circuit 20 using zero firewire for that will be led to
The current signal that the air-conditioning internal machine or outdoor machine of air-conditioner of news are exported is converted to Transistor-Transistor Logic level signal, is then communicated again by MAX232
Transistor-Transistor Logic level signal is converted to RS232 communication signals and exported to host computer 3 by circuit 30, realizes zero fire of internal-external machine to air-conditioning
The real time monitoring of the status information of line connection, provides great convenience for the test and repair of air-conditioning, can quickly divide
Analysis problem solves the problems, such as, realizes high efficiency.Moreover, it is also possible to the monitoring to multi-split air conditioner be realized, in real time to air-conditioning
Operating status carries out remote monitoring and operation.
Finally it is emphasized that the above is only the preferred embodiment of the present invention, it is not limited to this reality
With novel, for those skilled in the art, the utility model can have various change and change, all in the utility model
Spirit and principle within, any modification, equivalent substitution, improvement and etc. done should be included in the protection model of the utility model
Within enclosing.
Claims (10)
1. air-conditioning site monitor, including main control module and power module, the power module provide electricity for the main control module
Source, it is characterised in that：
The main control module includes capacitance-resistance voltage reduction circuit, communicates sample circuit, low-voltage power circuit and MAX232 communicating circuits,
The capacitance-resistance voltage reduction circuit provides the first power supply for the communication sample circuit, and the low-voltage power circuit is logical for the MAX232
It interrogates circuit and second source is provided；
The communication sample circuit receives the communication signal transmitted by air-conditioner controller, the communication sample circuit output TTL electricity
To the MAX232 communicating circuits, the Transistor-Transistor Logic level signal is converted into RS232 and communicated ordinary mail number by the MAX232 communicating circuits
Signal, the MAX232 communicating circuits export the RS232 communication signals to host computer；
The communication sample circuit includes operational amplifier, multiple isolating diodes and photoisolator, multiple isolation
The cathode of diode is electrically connected with the input terminal of the operational amplifier respectively, the output end of the operational amplifier and the light
Electric isolator is electrically connected.
2. air-conditioning site monitor according to claim 1, it is characterised in that：
The capacitance-resistance voltage reduction circuit includes step-down capacitor, zener diode, rectifier diode and discharge resistance, the electric discharge electricity
Resistance is in parallel with the step-down capacitor, and the cathode of the zener diode is electrically connected with the discharge resistance, the rectifier diode
Anode be electrically connected with the step-down capacitor.
3. air-conditioning site monitor according to claim 1, it is characterised in that：
The low-voltage power circuit includes voltage stabilizing chip, the first capacitance, the second diode, inductance and the second capacitance, and described
One capacitance is electrically connected with the first input end of the voltage stabilizing chip, the inductance and second diode respectively with the voltage stabilizing
The second output terminal of chip is electrically connected.
4. air-conditioning site monitor according to claim 3, it is characterised in that：
The first input end of the voltage stabilizing chip receives the second voltage signal of the power module output, the voltage stabilizing chip
4th output end exports low voltage signal to the MAX232 communicating circuits.
5. air-conditioning site monitor according to any one of claims 1 to 3, it is characterised in that：
The MAX232 communicating circuits include MAX232 communication chips, described in the input pin reception of the MAX232 communication chips
The output pin of Transistor-Transistor Logic level signal, the MAX232 communication chips exports the RS232 communication signals to the host computer.
6. monitoring air-conditioner, including at least one air-conditioner controller and host computer, the air-conditioner controller with it is described upper
Air-conditioning site monitor, the air-conditioner controller outputting communication signal to the air-conditioning site monitor, feature are connected between machine
It is：
The air-conditioning site monitor includes main control module and power module, and the power module provides electricity for the main control module
Source, the main control module include capacitance-resistance voltage reduction circuit, communicate sample circuit, low-voltage power circuit and MAX232 communicating circuits,
The capacitance-resistance voltage reduction circuit provides the first power supply for the communication sample circuit, and the low-voltage power circuit is logical for the MAX232
It interrogates circuit and second source is provided；
The communication sample circuit receives the communication signal transmitted by the air-conditioner controller, and the communication sample circuit is defeated
Go out Transistor-Transistor Logic level signal to the MAX232 communicating circuits, the Transistor-Transistor Logic level signal is converted by the MAX232 communicating circuits
RS232 communication signals, the MAX232 communicating circuits export the RS232 communication signals to host computer；
The communication sample circuit includes operational amplifier, multiple isolating diodes and photoisolator, multiple isolation
The cathode of diode is electrically connected with the input terminal of the operational amplifier respectively, the output end of the operational amplifier and the light
Electric isolator is electrically connected.
7. monitoring air-conditioner according to claim 6, it is characterised in that：
The capacitance-resistance voltage reduction circuit includes step-down capacitor, zener diode, rectifier diode and discharge resistance, the electric discharge electricity
Resistance is in parallel with the step-down capacitor, and the cathode of the zener diode is electrically connected with the discharge resistance, the rectifier diode
Anode be electrically connected with the step-down capacitor.
8. monitoring air-conditioner according to claim 6, it is characterised in that：
The low-voltage power circuit includes voltage stabilizing chip, the first capacitance, the second diode, inductance and the second capacitance, and described
One capacitance is electrically connected with the first input end of the voltage stabilizing chip, the inductance and second diode respectively with the voltage stabilizing
The second output terminal of chip is electrically connected.
9. monitoring air-conditioner according to claim 8, it is characterised in that：
The first input end of the voltage stabilizing chip receives the second voltage signal of the power module output, the voltage stabilizing chip
4th output end exports low voltage signal to the MAX232 communicating circuits.
10. according to claim 6 to 8 any one of them monitoring air-conditioner, it is characterised in that：
The MAX232 communicating circuits include MAX232 communication chips, described in the input pin reception of the MAX232 communication chips
The output pin of Transistor-Transistor Logic level signal, the MAX232 communication chips exports the RS232 communication signals to the host computer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721730165.XU CN207741273U (en) | 2017-12-11 | 2017-12-11 | Air-conditioning site monitor and monitoring air-conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721730165.XU CN207741273U (en) | 2017-12-11 | 2017-12-11 | Air-conditioning site monitor and monitoring air-conditioner |
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| Publication Number | Publication Date |
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| CN207741273U true CN207741273U (en) | 2018-08-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201721730165.XU Active CN207741273U (en) | 2017-12-11 | 2017-12-11 | Air-conditioning site monitor and monitoring air-conditioner |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109901462A (en) * | 2019-02-15 | 2019-06-18 | 航天神舟飞行器有限公司 | A kind of power management and information acquisition circuit |
-
2017
- 2017-12-11 CN CN201721730165.XU patent/CN207741273U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109901462A (en) * | 2019-02-15 | 2019-06-18 | 航天神舟飞行器有限公司 | A kind of power management and information acquisition circuit |
| CN109901462B (en) * | 2019-02-15 | 2022-08-05 | 航天神舟飞行器有限公司 | Power management and information acquisition circuit |
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