CN202679060U - Uninterrupted power source management system of seabed observation network - Google Patents
Uninterrupted power source management system of seabed observation network Download PDFInfo
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- CN202679060U CN202679060U CN2012202862038U CN201220286203U CN202679060U CN 202679060 U CN202679060 U CN 202679060U CN 2012202862038 U CN2012202862038 U CN 2012202862038U CN 201220286203 U CN201220286203 U CN 201220286203U CN 202679060 U CN202679060 U CN 202679060U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
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Abstract
The utility model discloses an uninterrupted power source management system of a seabed observation network comprising a pressure reduction module used for the pressure reduction transformation of a direct current high pressure output by a main power source, a back-up power source, and a central processor. An output end of the pressure reduction module is connected with a cathode of a diode by a switch access of a first switch on one hand, and an anode of the diode is connected with the back-up power source, on the other hand, the output end of the pressure reduction module can be used to output the power of the power source to the central processor and a node circuit control board of the seabed observation network. The direct current power source output by the pressure reduction module and the back-up power source can be used to output a detection signal to the central processor after the sampling of a voltage detection circuit and a current detection circuit, and the central processor can be used to output a control signal to a control end of the first switch. The power source management system can be controlled to switch from the main power source to the back-up power source according to the unusual conditions of the system, therefore the normal running of the seabed observation network system can be guaranteed, and the maintenance costs can be reduced.
Description
Technical field
The utility model belongs to oceanographic observation systems technology field, specifically, relates to a kind of control and management system for the power-supply system of seabed observation network being realized monitoring and maintenance.
Background technology
The seabed observation network system can provide many key elements, multi-disciplinary long-term real-time monitored; can be applicable to comprise the research work of the aspects such as basic scientific research, natural resources and energy resources, exploration and development utilization, disaster and environmental protection, navigation, satisfy the observation requirements to the various parameter key elements in seabed, water body and sea.
Electric energy is the lifeblood of seabed observation network in the seabed observation network system, does not have the electric energy whole system just can not turn round.Because failure and other reasons when causing main electrical network to disconnect, the instrument and equipment in the seabed observation network will be out of service when the seabed observation network system, and observation data will be interrupted, the whole network state that will paralyse.In order to guarantee the normal operation of seabed observation network, in the system joint box, often be provided with the backup battery group as uninterrupted power supply, with chronicity and the continuity of guaranteeing submarine observation, and then provide complete data for the deep-sea research work.
In order to realize the uninterrupted power supply of seabed observation network, need to design perfect main power source and back-up source control switching circuit, charging circuit and power parameter testing circuit.And also do not have perfect uninterrupted power supply management system for seabed observation network in the market, thereby can't satisfy the application demand of the long-term normal operation of seabed observation network.
Summary of the invention
The utility model provides a kind of uninterrupted power supply management system for seabed observation network, has satisfied the application demand of the long-term normal operation of seabed observation network.
In order to solve the problems of the technologies described above, the utility model is achieved by the following technical solutions:
A kind of uninterrupted power supply management system of seabed observation network comprises the voltage reduction module, back-up source and the central processing unit that the high direct voltage of main power source output are carried out decompression transformation; The output of described voltage reduction module connects the negative electrode of a diode on the one hand by the switch ways of the first switch, the described back-up source of the anodic bonding of described diode is exported the node circuit control board of power supply to described central processing unit and the seabed observation network on the other hand; After sampling by voltage detecting circuit and current detection circuit respectively by the DC power supply of described voltage reduction module and back-up source output, output detection signal is to described central processing unit, and described central processing unit outputs control signals to the control end of the first switch.
In order to realize the charging accumulation of energy to back-up source, to guarantee when the mains power failure, can store the need for electricity that sufficient electric energy satisfies each instrument, equipment in the seabed observation network in the back-up source, the output of described voltage reduction module connects described back-up source by the switch ways of the 3rd switch, described central processing unit outputs control signals to the control end of the 3rd switch, when normal and back-up source is under-voltage at main power source, control the 3rd switch conduction, utilize main power source to charge for back-up source.
Further, the output of described voltage reduction module connects the input of an inverter circuit by the switch ways of the 3rd switch, and the output of described inverter circuit connects charging circuit, by charging circuit output charging current to described back-up source.
Preferably, described back-up source preferably adopts the lithium battery group, and the amplitude of the direct voltage of its output equals the amplitude of the direct voltage of voltage reduction module output.
In order to realize the detection to back-up source working temperature abnormity situation, preferably connect a thermistor at described back-up source, by the temperature of thermistor detection back-up source, and output detection signal is to described central processing unit.
Further again, described voltage detecting circuit, current detection circuit and thermistor be the connection mode number converter respectively, converts the detection signal of analog quantity to digital signal by analog to digital converter and exports described central processing unit to.
In order to satisfy the different power demands of central processing unit and node circuit control board, preferably with the output of described voltage reduction module by the first switch respectively with the corresponding connection of input of two DC-to-DC converter, the output of one of them DC-to-DC converter is by the feeder ear of the switch ways connected node circuit control panel of second switch, and the control end of described second switch receives the control signal of central processing unit output; The output of another one DC-to-DC converter is by the feeder ear of the switch ways connection central processing unit of the 4th switch, the control signal of the control end receiving node circuit control panel output of described the 4th switch.
Further, also be connected with a voltage stabilizing circuit between the feeder ear of the switch ways of described the 4th switch and central processing unit, voltage stabilizing generates the required power supply of central processing unit; Preferably, described the first switch, second switch and the 4th switch preferably adopt normally closed switch, to reduce the action frequency of switch.
Preferably, described central processing unit preferably carries out serial communication, transmission of control signals by serial port communication chip and described node circuit control board.
Further, in described central processing unit, be built-in with ethernet controller, connect Ethernet interface, described Ethernet interface connects Ethernet switch, and by described Ethernet switch and seashore base station connecting communication, to satisfy the telecommunication requirement between seashore base station and the central processing unit.
Compared with prior art, advantage of the present utility model and good effect are: the utility model for the long-term uninterrupted power supply demand of seabed observation network node system and specialized designs a kind of uninterrupted power supply management system, this power-supply management system can Real-Time Monitoring power-supply system parameter, can between main power source and back-up source, carry out quickly switching controls according to the system exception situation, and can carry out the fault emergency processing to power-supply management system according to the instruction that send the seashore base station, thereby kept to the full extent the normal operation of seabed observation network system, reduced the maintenance cost of system.
Description of drawings
Fig. 1 is the schematic block circuit diagram of the uninterrupted power supply management system of the seabed observation network that proposes of the utility model.
Embodiment
Below in conjunction with accompanying drawing embodiment of the present utility model is described in more detail.
Embodiment one, the uninterrupted power supply management system of present embodiment is for the node circuit control system specialized designs in the seabed observation network, be used to the node circuit control board in the system that continual working power is provided, to satisfy the long-term normal operation of seabed observation network.The uninterrupted power supply management system of present embodiment mainly by central processing unit, be used for main power source is carried out voltage reduction module, the back-up source of decompression transformation and be used for power supply detection module that unusual condition to main power source and back-up source carries out Real-Time Monitoring setting up and forming, referring to shown in Figure 1.In the present embodiment, described central processing unit can adopt the integrated chip with signal handling capacity to carry out system, and present embodiment is following to be described as an example of single-chip microcomputer example.For present seabed observation network system, the main power source that is delivered to each sea bed observation platform by the seashore base station is generally the high direct voltage of 6000VDC, after need to carrying out decompression transformation via the high voltage source module, direct voltage output to the voltage reduction module conversion that generates 400VDC generates low-voltage dc power supply (for example 48VDC), and then is the electricity consumption load supplying in the node circuit control system.
Automatically switch in order between main power source and back-up source, to realize, the continuous need for electricity of using electric loading to satisfy each, present embodiment is connected respectively to the negative electrode of a diode D1 and rear class with on the electric loading with the output of the voltage reduction module switch ways by the first switch, the positive pole of the anodic bonding back-up source of diode D1, the control end of the first switch connects one road GPIO mouth of single-chip microcomputer, receive the control signal of single-chip microcomputer output, and then control its switch ways break-make.In the present embodiment, consider that in most times all be for the load supplying in each network node by main power source, in order to reduce the action frequency of switch, the preferred normally closed switch (hereinafter referred to as normally closed switch 1) that adopts is as described the first switch, the output and the rear class that are connected to voltage reduction module are used between the electric loading, can only when main power source breaks down, just need to control thus normally closed switch 1 action, switch to back-up source and continue as each electricity consumption load supplying in the node circuit.
For the operation irregularity situation to main power source and back-up source is carried out Real-Time Monitoring, present embodiment arranges voltage detecting circuit and current detection circuit in power-supply management system comes respectively the voltage and current of voltage reduction module and back-up source output is carried out sample detecting, and then the detection signal that generates reflecting voltage size and size of current exports single-chip microcomputer to, judging the working condition of present main power source and back-up source, and then provide foundation for the accurate switching of two-way power supply.For the single-chip microcomputer that needs receiving digital signals, the detection signal of the analog quantity that can export sampling by voltage detecting circuit and current detection circuit at first exports analog to digital converter to and carries out analog quantity after the conversion process of digital quantity, transfers to single-chip microcomputer again and judges identification.In the present embodiment, preferably adopt spi bus to be connected between described analog to digital converter and the single-chip microcomputer, to realize detecting data transfer.
For the working condition to back-up source realizes accurately judging, the working temperature of back-up source also is a factor that needs consideration.For this reason, present embodiment arranges a thermistor near back-up source, and be connected between the positive pole and analog to digital converter of back-up source, the characteristic that the resistance of utilizing thermistor changes with the variations in temperature of back-up source, cross the size of current of thermistor (and after converting digital signal to by analog to digital converter by acquisition stream, transfer in the single-chip microcomputer) can converse the temperature level of back-up source, and then realize that single-chip microcomputer is to the comprehensive judgement of back-up source working condition.
In the present embodiment, the preferred lithium battery group that adopts is as described back-up source, auxiliary main power source is realized the uninterrupted power supply to the network node control system, as shown in Figure 1, and the amplitude of the direct voltage of described lithium battery group output should equal main power source by the voltage magnitude of described voltage reduction module conversion output.Present embodiment is all exported under normal circumstances the 48V direct voltage take voltage reduction module and lithium battery group and is described as example.When main power source is powered when normal, the 48V direct voltage by voltage reduction module output transfers to the rear class electric loading via normally closed switch 1, and is applied to the negative electrode of diode D1.Described diode D1 can adopt a Schottky diode to carry out the design of circuit system.Because the direct voltage by the output of lithium battery group also is 48V, and the conducting of Schottky diode D1 need to have the forward voltage drop of 0.7V, thereby in main power source situation working properly, diode D1 is in cut-off state, and each in the network node used the power supply of main power source output with electric loading.And when single-chip microcomputer detects direct voltage by voltage reduction module output and the unusual condition such as overvoltage, overcurrent or under-voltage, undercurrent occurs by voltage detecting circuit and current detection circuit, output control signals to normally closed switch 1 by its GPIO mouth, control normally closed switch 1 disconnects.At this moment, diode D1 changes conducting state over to owing to its anode voltage is higher than its cathode voltage, and then each use electric loading with the direct voltage of lithium battery group output transfers in the network node, is that load continues to power.
Consider that the required operating voltage of node circuit control board in single-chip microcomputer and the network node system often is not the situation of 48V, after also needing further to carry out conversion process respectively via two DC-to-DC converter DC/DC1, DC/DC2 for the 48V power supply by the output of voltage reduction module and lithium battery group, satisfy the different needs for electricity of single-chip microcomputer and node circuit control board with the direct voltage that generates different amplitudes.Need situation that 5V direct current supply, single-chip microcomputer need 3.3V direct current supply to describe as example take the node circuit control board.Utilize DC/DC1 to receive the auxiliary electric power supply that voltage reduction module passes through diode D1 output by main electricity or the reception lithium battery group of normally closed switch 1 output, and then convert the 5V direct voltage transfers to the node circuit control board by the switch ways of second switch feeder ear to, and then further change via the power module on the node circuit control board and to generate the required operating voltage of each instrument and equipment, be different instruments, power devices.The same preferred normally closed switch (hereinafter referred to as normally closed switch 2) that adopts of described second switch carries out the design of circuit system, its control end is connected to other one road GPIO mouth of single-chip microcomputer, controls its switch ways conducting or shutoff according to the control signal of single-chip microcomputer output.For DC/DC2, its input is connected with the negative electrode of normally closed switch 1 with diode D1 respectively, receive main power source by the main electricity of voltage reduction module conversion output or receive the lithium battery group by the auxiliary electric power supply of diode D1 output, and then convert the switch ways of 12V direct voltage by the 4th switch to and transfer to a voltage stabilizing circuit, and then convert the direct voltage output of 3.3V to by voltage stabilizing circuit to the feeder ear VCC of single-chip microcomputer, for single-chip microcomputer provides its required operating voltage.Same, also preferably adopt a normally closed switch (hereinafter referred to as normally closed switch 4) to carry out the design of circuit system for described the 4th switch, the control end of normally closed switch 4 is connected to the node circuit control board, utilizes the node circuit control board that it is carried out break-make control.
When single-chip microcomputer detects the voltage of main power source by voltage reduction module output, when current parameters is normal, then controls normally closed switch 1 closure by voltage detecting circuit and current detection circuit, make main power source recover power supply to network node system.Meanwhile, for the electric energy of lithium battery group consumption is in time supplied, 48V DC power supply by voltage reduction module output is transferred to an inverter circuit via the switch ways of the 3rd switch (describing as an example of normally closed switch 3 example), be reverse into the alternating voltage of 220V by described inverter circuit after, export charging circuit to and become the required charging voltage of lithium battery group and charging current with rectifying conversion, and then be the accumulation of energy of charging of lithium battery group.The control end of described normally closed switch 3 can be connected on independent one road GPIO mouth of single-chip microcomputer, utilizes single-chip microcomputer that it is carried out break-make control.
To detect main power source power supply by voltage detecting circuit and current detection circuit normal when single-chip microcomputer, and the lithium battery group is when under-voltage, 3 conductings of control normally closed switch, and then to utilize main power source be lithium battery group charging accumulation of energy.When detecting the lithium battery group by voltage detecting circuit, single-chip microcomputer has been full of electricity; perhaps single-chip microcomputer detects the lithium battery group by current detection circuit overcurrent, undercurrent etc. to occur unusual; also or single-chip microcomputer detect the lithium battery group by thermistor and excess Temperature or excessively low etc. when unusual occurs; then output control signals to the control end of normally closed switch 3; control normally closed switch 3 disconnects; main power source is stopped the charging of lithium battery group, to realize the protection to the lithium battery group by the 48V DC power supply of voltage reduction module output.
In addition, single-chip microcomputer is connected communication by serial port communication chip MAX232 with the node circuit control board, on the one hand the main power source that collects and voltage, electric current, the temperature data of lithium battery group are sent to the node circuit control board, and then be uploaded to the seashore base station by Ethernet switch, to realize that the seashore staff is to the remote monitor of power-supply management system operation conditions in each network node system; On the other hand, when the node circuit control board judges that catastrophe failure appears in SCM Based uninterrupted power supply management system, can output control signals to normally closed switch 4 by its IO circuit, normally closed switch 4 is disconnected, and then control single chip computer be out of service.
Further integrated ethernet controller in described single-chip microcomputer, external Ethernet interface RJ45, and then connect described Ethernet switch by Ethernet interface RJ45, realize the data communication between seashore base station and the single-chip microcomputer.Adopt this design, when catastrophe failure appears in the node circuit control board, control command can be sent to single-chip microcomputer by Ethernet switch in the seashore base station, and then output control signals to normally closed switch 2 by single-chip microcomputer, disconnect with control normally closed switch 2, make the node circuit control board out of service, avoid the further expansion of fault.
Uninterrupted power supply management system of the present utility model is for the seabed observation network node platform specialized designs, can finish well the normal supply of long duration task of seabed observation network node power supply, guarantee to the full extent the normal operation of seabed observation network node power-supply system, greatly reduced the probability of malfunction of seabed observation network node power supply.
Certainly; above-mentioned explanation is not to be to restriction of the present utility model; the utility model also is not limited in above-mentioned giving an example, and the variation that those skilled in the art make in essential scope of the present utility model, remodeling, interpolation or replacement also should belong to protection range of the present utility model.
Claims (10)
1. the uninterrupted power supply management system of a seabed observation network, comprise the voltage reduction module and the back-up source that the high direct voltage of main power source output are carried out decompression transformation, it is characterized in that: also comprise a central processing unit, the output of described voltage reduction module connects the negative electrode of a diode on the one hand by the switch ways of the first switch, the described back-up source of the anodic bonding of described diode is exported the node circuit control board of power supply to described central processing unit and the seabed observation network on the other hand; After sampling by voltage detecting circuit and current detection circuit respectively by the DC power supply of described voltage reduction module and back-up source output, output detection signal is to described central processing unit, and described central processing unit outputs control signals to the control end of the first switch.
2. the uninterrupted power supply management system of seabed observation network according to claim 1, it is characterized in that: the output of described voltage reduction module connects described back-up source by the switch ways of the 3rd switch, and described central processing unit outputs control signals to the control end of the 3rd switch.
3. the uninterrupted power supply management system of seabed observation network according to claim 2, it is characterized in that: the output of described voltage reduction module connects the input of an inverter circuit by the switch ways of the 3rd switch, the output of described inverter circuit connects charging circuit, exports charging current to described back-up source by charging circuit.
4. the uninterrupted power supply management system of seabed observation network according to claim 3, it is characterized in that: described back-up source is the lithium battery group, the amplitude of the direct voltage of its output equals the amplitude of the direct voltage of voltage reduction module output.
5. the uninterrupted power supply management system of seabed observation network according to claim 1 is characterized in that: described back-up source connects thermistor, detect the temperature of back-up source by thermistor, and output detection signal is to described central processing unit.
6. the uninterrupted power supply management system of seabed observation network according to claim 5, it is characterized in that: described voltage detecting circuit, current detection circuit and thermistor be the connection mode number converter respectively, converts the detection signal of analog quantity to digital signal by analog to digital converter and exports described central processing unit to.
7. the uninterrupted power supply management system of each described seabed observation network in 6 according to claim 1, it is characterized in that: with the output of described voltage reduction module by the first switch respectively with the corresponding connection of input of two DC-to-DC converter, the output of one of them DC-to-DC converter is by the feeder ear of the switch ways connected node circuit control panel of second switch, and the control end of described second switch receives the control signal of central processing unit output; The output of another one DC-to-DC converter is by the feeder ear of the switch ways connection central processing unit of the 4th switch, the control signal of the control end receiving node circuit control panel output of described the 4th switch.
8. the uninterrupted power supply management system of seabed observation network according to claim 7 is characterized in that: also be connected with a voltage stabilizing circuit between the feeder ear of the switch ways of described the 4th switch and central processing unit; Described the first switch, second switch and the 4th switch are normally closed switch.
9. the uninterrupted power supply management system of seabed observation network according to claim 7, it is characterized in that: described central processing unit carries out serial communication by serial port communication chip and described node circuit control board.
10. the uninterrupted power supply management system of seabed observation network according to claim 7, it is characterized in that: in described central processing unit, be built-in with ethernet controller, connect Ethernet interface, described Ethernet interface connects Ethernet switch, and by described Ethernet switch and seashore base station connecting communication.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012202862038U CN202679060U (en) | 2012-06-18 | 2012-06-18 | Uninterrupted power source management system of seabed observation network |
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| CN2012202862038U CN202679060U (en) | 2012-06-18 | 2012-06-18 | Uninterrupted power source management system of seabed observation network |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103354386A (en) * | 2013-05-15 | 2013-10-16 | 佛山市上驰电源科技有限公司 | Single-in and single-out parallel online UPS (uninterrupted power supply) |
| CN103399359A (en) * | 2013-08-21 | 2013-11-20 | 国家海洋局第二海洋研究所 | Benthonic geophysical observation device |
| CN104216319A (en) * | 2014-08-27 | 2014-12-17 | 浙江大学 | Monitoring system in seafloor observatory network junction box |
| CN110034595A (en) * | 2019-04-08 | 2019-07-19 | 深圳市锐明技术股份有限公司 | A kind of backup battery managing device and mobile unit |
| CN110752580A (en) * | 2018-07-23 | 2020-02-04 | 中国科学院沈阳自动化研究所 | Connection box power supply system and method for submarine observation network |
| CN113708445A (en) * | 2021-08-20 | 2021-11-26 | 上海深湾能源科技有限公司 | Box power of plugging into |
| CN114301134A (en) * | 2021-12-29 | 2022-04-08 | 广州南方电力集团科技发展有限公司 | Back-up power on-off control circuit |
| CN115037031A (en) * | 2022-06-30 | 2022-09-09 | 杭州海康消防科技有限公司 | Power supply circuit and electronic equipment |
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2012
- 2012-06-18 CN CN2012202862038U patent/CN202679060U/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103354386A (en) * | 2013-05-15 | 2013-10-16 | 佛山市上驰电源科技有限公司 | Single-in and single-out parallel online UPS (uninterrupted power supply) |
| CN103399359A (en) * | 2013-08-21 | 2013-11-20 | 国家海洋局第二海洋研究所 | Benthonic geophysical observation device |
| CN104216319A (en) * | 2014-08-27 | 2014-12-17 | 浙江大学 | Monitoring system in seafloor observatory network junction box |
| CN110752580A (en) * | 2018-07-23 | 2020-02-04 | 中国科学院沈阳自动化研究所 | Connection box power supply system and method for submarine observation network |
| CN110034595A (en) * | 2019-04-08 | 2019-07-19 | 深圳市锐明技术股份有限公司 | A kind of backup battery managing device and mobile unit |
| CN110034595B (en) * | 2019-04-08 | 2024-03-08 | 深圳市锐明技术股份有限公司 | Backup power supply management device and vehicle-mounted equipment |
| CN113708445A (en) * | 2021-08-20 | 2021-11-26 | 上海深湾能源科技有限公司 | Box power of plugging into |
| CN114301134A (en) * | 2021-12-29 | 2022-04-08 | 广州南方电力集团科技发展有限公司 | Back-up power on-off control circuit |
| CN114301134B (en) * | 2021-12-29 | 2024-05-24 | 广州南方电力集团科技发展有限公司 | On-off control circuit of backup power supply |
| CN115037031A (en) * | 2022-06-30 | 2022-09-09 | 杭州海康消防科技有限公司 | Power supply circuit and electronic equipment |
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