Centralized controller system

Abstract

A centralized controller system comprises a multi-protocol control module and a measurement control module. Wherein the measurement control module comprises a plurality of metering devices and / or control devices; and the multi-protocol control module is in communication connection with the plurality of metering devices and / or control devices, and performs communication interaction with the plurality of metering devices and / or control devices through communication protocols corresponding to the plurality of metering devices and / or control devices.

Description

Technical Field

[0001] This application relates to the technical field of instruments and meters, and particularly to a centralized controller system. Background Art

[0002] With the wide application of intelligent control systems, the heating system has become more flexible and energy-efficient. In the current intelligent heating system, there are many types of measurement and control devices, many manufacturers, complex protocols, and inconsistent standards. For example, in the intelligent heating system, there are various devices such as calorimeters, flow meters, electric meters, electric valve actuators, and wireless communication. Each device uses a different communication protocol, and most of them are proprietary protocols, and these protocols cannot operate on the same physical layer. In order to enable measurement and control devices with different protocols to work together, a centralized control device with a wide interface, high integration, strong processing ability, and adaptable to future intelligent big data streams needs to be designed. Utility Model Content

[0003] The utility model provides a centralized controller system to achieve centralized control with a wide interface and high integration for measurement and control devices using various different protocols.

[0004] According to one aspect of the present application, a centralized controller system is provided, including: a multi-protocol control module and a measurement and control module. Among them, the measurement and control module includes a plurality of metering devices and / or control devices; and the multi-protocol control module is communicatively connected to the plurality of metering devices and / or control devices, and communicates with the plurality of metering devices and / or control devices through communication protocols corresponding to the plurality of metering devices and / or control devices.

[0005] Optionally, the system further includes a communication device communicatively connected to the multi-protocol control module.

[0006] Optionally, the communication device is an industrial router.

[0007] Optionally, the plurality of metering devices and / or control devices include: a wireless temperature control panel, a pressure transmitter, a temperature transmitter, an ultrasonic flow meter, and / or an intelligent regulating valve.

[0008] Optionally, the multi-protocol control module includes: a control board, a protocol conversion circuit, and a multi-protocol communication module. Among them, the multi-protocol communication module includes a plurality of communication circuit modules supporting different protocols, and communicates with the plurality of metering devices and / or control devices through communication protocols corresponding to the plurality of metering devices and / or control devices; the protocol conversion circuit is connected to the plurality of communication circuit modules and is connected to the control board to communicate with the control board with a unified communication protocol; and the control board is communicatively connected to the communication device.

[0009] Optionally, the multiple communication circuit modules include: a radio frequency module, an RS485 transceiver circuit, and an M-BUS transceiver circuit.

[0010] Optionally, the protocol conversion circuit includes: a USB hub controller; and multiple protocol conversion chips. And among them, the multiple protocol conversion chips are respectively connected to the corresponding communication circuit modules, and are used to communicate with the communication circuit modules through the communication protocol corresponding to the corresponding communication circuit modules, and communicate with the USB hub controller through the USB communication protocol; and the USB hub controller is respectively connected to the multiple protocol conversion chips through the USB serial bus, and is connected to the control board through the USB serial bus.

[0011] Optionally, the system further includes a power supply module, where the power supply module is connected to the communication device, the multi-protocol control module, and the measurement control module.

[0012] Optionally, the power supply module further includes: a circuit breaker, a smart meter, an AC-DC power supply, a protection circuit, and multiple DC-DC power supplies. Among them, the input end of the circuit breaker is connected to an external AC power supply; the input end of the smart meter is connected to the output end of the circuit breaker; the input end of the AC-DC power supply is connected to the output end of the smart meter; the input end of the protection circuit is connected to the output end of the AC-DC power supply; and the output end of the protection circuit is connected to the input ends of the multiple DC-DC power supplies.

[0013] Optionally, the protection circuit includes: a first diode, a varistor, a second diode, and a filter capacitor. Among them, the first end of the first diode is connected to the output end of the AC-DC power supply, and the second end of the first diode is connected to the input ends of the multiple DC-DC power supplies; and the varistor, the second diode, and the filter capacitor are arranged in parallel between the second end of the first diode and the ground, where the second diode is used to prevent surges. And among them, a super capacitor is provided at the output end of the DC-DC power supply that outputs a specified voltage among the multiple DC-DC power supplies.

[0014] In summary, the present utility model provides a centralized controller system. According to this centralized controller system, the measurement and control module includes a plurality of metering devices and / or control devices that interact with information using different protocols. More specifically, the plurality of metering devices and / or control devices include: a wireless temperature control panel, a pressure transmitter, a temperature transmitter, an ultrasonic flowmeter, and / or an intelligent regulating valve. Among them, for example, the wireless temperature control panel communicates through a radio frequency protocol, the pressure transmitter and the temperature transmitter communicate through an RS485 protocol, and the ultrasonic flowmeter and the intelligent regulating valve communicate through an M-BUS. Thus, the centralized controller system is communicatively connected to the plurality of metering devices and / or control devices through a multi-protocol control module, and communicates and interacts with the plurality of metering devices and / or control devices through the communication protocols corresponding to the plurality of metering devices and / or control devices. In this way, for measurement and control devices using various different protocols, centralized control with a wide interface and high integration is achieved.

[0015] Those skilled in the art will better understand the above and other objects, advantages, and features of the present utility model from the following detailed description of specific embodiments of the present application in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Some specific embodiments of the present application will be described in detail hereinafter with reference to the accompanying drawings in an exemplary and non-limiting manner. The same reference numerals in the drawings denote the same or similar components or parts. Those skilled in the art should understand that these drawings are not necessarily drawn to scale. In the drawings:

[0017] Figure 1 is a schematic diagram of the architecture of a centralized controller system according to an embodiment of the present application;

[0018] Figure 2 is Figure 1 the multi-protocol control module of the centralized controller system shown;

[0019] Figure 3 is Figure 1 a schematic diagram of the power supply module of the centralized controller system shown;

[0020] Figure 4 is Figure 3 a schematic diagram of the protection circuit of the power supply module shown;

[0021] Figure 5 is Figure 1 a schematic diagram of the communication between the multi-protocol control module of the centralized controller system and the cloud database; and

[0022] Figure 6 is a schematic diagram of debugging the control board. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments may be combined with each other. The following will describe the present utility model in detail with reference to the drawings and in conjunction with the embodiments.

[0024] In order to enable those skilled in the art of this technology to better understand the solution of the present utility model, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the scope of protection of the present utility model.

[0025] It should be noted that the terms "first", "second", etc. in the specification and claims of the present utility model and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily need to be used to describe a specific order or sequence. It should be understood that such terms can be interchanged under appropriate circumstances, so as to describe the embodiments of the present utility model here. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0026] It should be noted that the terms used here are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used here, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should also be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0027] Figure 1 is a schematic diagram of the architecture of a centralized controller system according to an embodiment of the present application. Refer to Figure 1 As shown, the centralized controller system includes: a multi-protocol control module 200 and a measurement control module 300. Among them, the measurement control module 300 includes a plurality of metering devices and / or control devices; and the multi-protocol control module 200 is communicatively connected to the plurality of metering devices and / or control devices, and communicates and interacts with the plurality of metering devices and / or control devices through the communication protocols corresponding to the plurality of metering devices and / or control devices.

[0028] As described in the background art, there are many types of measurement and control devices used in current intelligent heating systems, with numerous manufacturers, complex protocols, and inconsistent standards. For example, in an intelligent heating system, there are various devices such as calorimeters, flow meters, electricity meters, electric valve actuators, and wireless communications. Each device uses a different communication protocol, and most of them are proprietary protocols that cannot operate on the same physical layer. To enable the coordinated operation of measurement and control devices with different protocols, a centralized control device with a wide interface, high integration level, strong processing power, and the ability to adapt to future intelligent big data streams needs to be designed.

[0029] In view of this, the present utility model provides a centralized controller system. According to this centralized controller system, the measurement and control module 300 includes multiple metering devices and / or control devices that interact with information using different protocols. More specifically, referring to Figure 1 as shown, the multiple metering devices and / or control devices include: a wireless temperature control panel 310, a pressure transmitter 320, a temperature transmitter 330, an ultrasonic flow meter 340, and / or an intelligent regulating valve 350. Among them, for example, the wireless temperature control panel 310 communicates through a wireless radio frequency protocol, and the pressure transmitter 320 and the temperature transmitter 330 communicate through an RS485 protocol, for example, and the ultrasonic flow meter 340 and the intelligent regulating valve 350 communicate through an M-BUS, for example. Thus, the centralized controller system is communicatively connected to the multiple metering devices and / or control devices through the multi-protocol control module 200, and communicates and interacts with the multiple metering devices and / or control devices through the communication protocols corresponding to the multiple metering devices and / or control devices. In this way, for measurement and control devices using various different protocols, a centralized control with a wide interface and high integration is achieved.

[0030] Optionally, the system further includes a communication device communicatively connected to the multi-protocol control module 200. Further optionally, the communication device can be an industrial router 100. Thus, according to the technical solution of the present utility model, after the centralized controller system realizes centralized control with a wide interface and high integration through the multi-protocol control module 200, it communicates with the upper-level device (such as the cloud database 400, referring to Figure 5 as shown) according to a unified communication protocol through a unified communication device (such as the industrial router 100).

[0031] Among them, as an example, the industrial router 100 can adopt the AR300 of Zhiyun Internet of Things, for example. The control board 210 can be connected to the industrial router 100 through a network port or WiFi function, and the industrial router 100 can communicate with the cloud through an Internet of Things card for data upload.

[0032] Optionally, referring to Figure 1As shown, the multi-protocol control module 200 includes: a control board 210, a protocol conversion circuit 220 and a multi-protocol communication module 230. The multi-protocol communication module 230 includes a plurality of communication circuit modules supporting different protocols, and communicates and interacts with a plurality of metering devices and / or control devices through communication protocols corresponding to the plurality of metering devices and / or control devices; the protocol conversion circuit 220 is connected to the plurality of communication circuit modules, and is connected to the control board 210, and communicates with the control board 210 using a unified communication protocol; and the control board 210 is connected to the communication device for communication.

[0033] Specifically, the control board 210 is provided with components such as a processor, memory, storage, input / output interface, and wireless network card, and can run an operating system. The signal from the control board 210 is sent to multiple communication circuit modules of the multi-protocol communication module 230 through the protocol conversion circuit 220. Thus, the wireless temperature control panel is connected through the wireless radio frequency function, the temperature transmitter and the pressure transmitter are connected through the RS485 circuit, and the ultrasonic flow meter 340, the intelligent regulating valve 350, and the intelligent meter 420 are connected through the M-BUS circuit (see Figure 3 )wait.

[0034] Thus, through the protocol conversion circuit 220 and the multi-protocol communication module 230, the control board 210 can communicate and interact with multiple metering devices and / or control devices supporting different communication protocols through the protocol conversion circuit 220 and the multi-protocol communication module 230 without setting up interfaces for multiple protocols.

[0035] As an example, the control board 210 may be an ARM control board using Orange Pi Zero3.

[0036] Optionally, refer to Figure 1 As shown, the multiple communication circuit modules include: a wireless radio frequency module 231, an RS485 transceiver circuit 232, and an M-BUS transceiver circuit 233. Of course, the above communication circuit modules are only exemplary, and may also include communication circuit modules of other protocol types.

[0037] As a specific example, the wireless RF module 231 may adopt the SX1268 module of the Lora protocol, for example; the RS485 transceiver circuit 232 may adopt the GM3085 chip of GATEMODE, for example; and the M-BUS transceiver circuit 233 may adopt the MC8721C chip, for example.

[0038] Optionally, refer to Figure 2As shown, the protocol conversion circuit 220 includes: a USB hub controller 221; and a plurality of protocol conversion chips 222a - 222c. Among them, the plurality of protocol conversion chips 222a - 222c are respectively connected to corresponding communication circuit modules, and are used to communicate with the communication circuit modules through the communication protocols corresponding to the respective communication circuit modules, and communicate with the USB hub controller 221 through the USB communication protocol; and the USB hub controller 221 is connected to the plurality of protocol conversion chips 222a - 222c respectively through a USB serial bus, and is connected to the control board 210 through the USB serial bus.

[0039] Specifically, the USB hub controller 221 can divide one USB interface into multiple independent USB interfaces, and convert the signal into the TTL level form through the protocol conversion chip. The input of the protocol conversion circuit 220 is connected to the control board 210, and the output is connected in parallel to the RS485 transceiver circuit 232, the M - BUS transceiver circuit 233, and the radio frequency module 231.

[0040] Thus, according to the present utility model, each of the protocol conversion chips 222a - 222c can communicate with the respective connected communication circuit modules (such as the radio frequency module 231, the RS485 transceiver circuit 232, and the M - BUS transceiver circuit 233) according to the corresponding protocols, and then communicate with the USB hub controller 221 through the USB protocol, so as to realize the conversion between the communication protocols of each communication circuit module and the USB protocol, and then the USB hub controller 221 communicates with the control board 210 through the USB serial bus uniformly. In this way, a communication method with a wide range of interfaces and a high degree of integration is realized.

[0041] As a specific example, the USB hub controller 221 can adopt, for example, the SL2.1A chip of CoreChips; and the protocol conversion chips 222a - 222c can adopt, for example, the CH340 chips of WCH.

[0042] Optionally, referring to Figure 1 As shown, the system further includes a power module 400, where the power module 400 is connected to the communication device, the multi - protocol control module 200, and the measurement and control module 300. In addition, further optionally, referring to Figure 3As shown in the figure, the power supply module 400 further includes: a circuit breaker 410, an intelligent electricity meter 420, an AC-DC power supply 430, a protection circuit 440, and multiple DC-DC power supplies 451 to 453. Among them, the input end of the circuit breaker 410 is connected to an external AC power supply; the input end of the intelligent electricity meter 420 is connected to the output end of the circuit breaker 410; the input end of the AC-DC power supply 430 is connected to the output end of the intelligent electricity meter 420; the input end of the protection circuit 440 is connected to the output end of the AC-DC power supply 430; and the output end of the protection circuit 440 is connected to the input ends of the multiple DC-DC power supplies.

[0043] Thus, in the technical solution of the present application, the input is two-phase three-wire 220V AC power, which is converted into 24V DC power after passing through the circuit breaker 410 and the intelligent electricity meter 420. After the 24V DC power passes through the protection circuit 440, it is respectively converted into 3.3V, 5V, and 36V DC power by the DC-DC power supplies 451 to 453. Among them, the 3.3V DC power is used to supply power to the radio frequency module 231; the 5V DC power is used to supply power to the control board 210 and each integrated chip; and the 36V DC power is connected to the M-BUS transceiver circuit for power supply.

[0044] For example, the DC-DC power supply 451 can adopt the LM2594M-3.3 of UMW, so as to provide a 1.5A DC current with a voltage of 3.3V. The DC-DC power supply 452 can adopt the LM2596 of TI, which can provide a 5A DC current with a voltage of 5V. The DC-DC power supply 453 can adopt the XL6019 of XLSEMI, which can provide a 5A DC current with a voltage of 36V.

[0045] Optionally, referring to Figure 4 As shown in the figure, the protection circuit 440 includes: a first diode 441, a varistor 442, a second diode 443, and a filter capacitor 444. Among them, the first end of the first diode 441 is connected to the output end of the AC-DC power supply 430, and the second end of the first diode 441 is connected to the input ends of the multiple DC-DC power supplies 451 to 453; and the varistor 442, the second diode 443, and the filter capacitor 444 are arranged in parallel between the second end of the first diode 441 and the ground, where the second diode 443 is used to prevent surges. For example, in the present application, a super capacitor 445 is arranged at the output end of the DC-DC power supply 452 with an output voltage of 5V.

[0046] In addition, referring to Figure 4 As shown in the figure, a super capacitor 445 can also be arranged at the output end of the DC-DC power supply that outputs a specified voltage. For example, in the present application, a super capacitor 445 is arranged at the output end of the DC-DC power supply 452 with an output voltage of 5V.

[0047] In addition, the control board 210 is also provided with ports for assisting debugging. Specifically, referring to Figure 6 as shown, the ports of the control board 210 can lead out a reset button 501, an OLED display screen 502, a debugging serial port 503, and a USB interface 504, so as to be used for debugging the control board 210.

[0048] In summary, the present utility model provides a centralized controller system. According to this centralized controller system, the measurement and control module includes multiple metering devices and / or control devices that perform information interaction using different protocols. More specifically, the multiple metering devices and / or control devices include: a wireless temperature control panel, a pressure transmitter, a temperature transmitter, an ultrasonic flowmeter, and / or an intelligent regulating valve. Among them, for example, the wireless temperature control panel communicates through a wireless radio frequency protocol, the pressure transmitter and the temperature transmitter communicate through an RS485 protocol, and the ultrasonic flowmeter and the intelligent regulating valve communicate through an M-BUS. Thus, the centralized controller system is communicatively connected to the multiple metering devices and / or control devices through a multi-protocol control module, and communicates and interacts with the multiple metering devices and / or control devices through the communication protocols corresponding to the multiple metering devices and / or control devices. In this way, for measurement and control devices using various different protocols, a centralized control with a wide interface and high integration is achieved.

[0049] Furthermore, the centralized controller system can simplify the system architecture, reduce equipment redundancy, simplify operation and maintenance, and can implement communication, monitoring, and control of multiple devices within one device; using an ARM control board as the core controller can enhance data integration and analysis capabilities, improve response speed, and reduce system power consumption; the OLED display screen can display the information of the ARM control board, and the debugging serial port can directly control the device using other computers, making the development, testing, and interaction with end users of the device more convenient and efficient, and performing basic system monitoring and debugging without additional peripheral devices; using an industrial router to upload data to the cloud is convenient for remote management and monitoring, ensures the security of data during transmission, is easy to upgrade and maintain, and improves the efficiency of data transmission; the wireless temperature control panel is connected to the centralized controller through a wireless radio frequency function, is easy to install, can be remotely controlled and monitored, and is easy to maintain.

[0050] Unless otherwise specifically stated, the relative arrangements, numerical expressions, and numerical values of the components and steps set forth in these embodiments do not limit the scope of the present utility model. At the same time, it should be understood that for the sake of description, the dimensions of the various parts shown in the drawings are not drawn in actual proportional relationships. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such technologies, methods, and devices should be regarded as part of the authorization specification. In all the examples shown and discussed here, any specific value should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0051] For the sake of description, spatial relative terms such as "above", "over", "on the upper surface", "upper" etc. may be used here to describe the spatial positional relationship of one device or feature to other devices or features as shown in the drawings. It should be understood that the spatial relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the drawings. For example, if the device in the drawing is inverted, the device described as "above" or "over" other devices or structures will then be positioned "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both the orientations of "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the corresponding explanations should be made for the spatial relative descriptions used here.

[0052] In the description of the present utility model, it should be understood that the orientation or positional relationships indicated by orientation terms such as "front, rear, upper, lower, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are generally based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description. Without contrary instructions, these orientation terms do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and thus should not be construed as limiting the protection scope of the present utility model; the orientation terms "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0053] As described above, the above are only the preferred specific embodiments of this application, but the protection scope of this application is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed in this application should be covered by the protection scope of this application. Therefore, the protection scope of this application should be subject to the protection scope of the claims.

Claims

1. A centralized controller system, characterized in that: include: A multi-protocol control module (200) and a measurement control module (300), wherein The measurement control module (300) includes a plurality of metering devices and / or control devices; and The multi-protocol control module (200) is communicatively connected to the plurality of metering devices and / or control devices, and communicates and interacts with the plurality of metering devices and / or control devices via a communication protocol corresponding to the plurality of metering devices and / or control devices.

2. The centralized controller system according to claim 1, characterized in that: It also includes a communication device, which is communicatively connected to the multi-protocol control module (200).

3. The centralized controller system according to claim 2, characterized in that: The communication device is an industrial router (100).

4. The centralized controller system according to claim 2, characterized in that: The multiple metering devices and / or control devices include: a wireless temperature control panel (310), a pressure transmitter (320), a temperature transmitter (330), an ultrasonic flow meter (340) and / or an intelligent regulating valve (350).

5. The centralized controller system according to claim 2, characterized in that: The multi-protocol control module (200) comprises: a control board (210), a protocol conversion circuit (220) and a multi-protocol communication module (230), wherein The multi-protocol communication module (230) includes a plurality of communication circuit modules supporting different protocols, and communicates and interacts with the plurality of metering devices and / or control devices through communication protocols corresponding to the plurality of metering devices and / or control devices; The protocol conversion circuit (220) is connected to the plurality of communication circuit modules and to the control board (210), and communicates with the control board (210) using a unified communication protocol; and The control board (210) is communicatively connected with the communication device.

6. The centralized controller system according to claim 5, characterized in that: The multiple communication circuit modules include: a wireless radio frequency module (231), an RS485 transceiver circuit (232), and an M-BUS transceiver circuit (233).

7. The centralized controller system according to claim 5, characterized in that: The protocol conversion circuit (220) comprises: a USB hub controller (221); and a plurality of protocol conversion chips (222a-222c), wherein The plurality of protocol conversion chips (222a-222c) are respectively connected to corresponding communication circuit modules, and are used to communicate with the communication circuit modules through communication protocols corresponding to the corresponding communication circuit modules, and to communicate with the USB hub controller (221) through USB communication protocols; and The USB hub controller (221) is respectively connected to the plurality of protocol conversion chips (222a-222c) via a USB serial bus, and is also connected to the control board (210) via a USB serial bus.

8. The centralized controller system according to claim 2, characterized in that: It also includes a power supply module (400), wherein the power supply module (400) is connected to the communication device, the multi-protocol control module (200) and the measurement control module (300).

9. The centralized controller system according to claim 8, characterized in that: The power supply module (400) further comprises: a circuit breaker (410), a smart meter (420), an AC-DC power supply (430), a protection circuit (440) and a plurality of DC-DC power supplies (451-453), wherein The input end of the circuit breaker (410) is connected to an external AC power source; The input end of the smart meter (420) is connected to the output end of the circuit breaker (410); The input end of the AC-DC power supply (430) is connected to the output end of the smart meter (420); The input end of the protection circuit (440) is connected to the output end of the AC-DC power supply (430); and The output end of the protection circuit (440) is connected to the input ends of the plurality of DC-DC power supplies.

10. The centralized controller system according to claim 9, characterized in that: The protection circuit (440) comprises: a first diode (441), a varistor (442), a second diode (443) and a filter capacitor (444), wherein A first end of the first diode (441) is connected to an output end of the AC-DC power supply (430), and a second end of the first diode (441) is connected to input ends of the plurality of DC-DC power supplies (451 to 453); and The varistor (442), the second diode (443) and the filter capacitor (444) are arranged in parallel between the second end of the first diode (441) and the ground, wherein the second diode (443) is used to prevent surges, and wherein, A super capacitor (445) is provided at the output end of a DC-DC power supply (452) that outputs a specified voltage among the plurality of DC-DC power supplies (451-453).

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