An electrical equipment operation monitor and monitoring method

Abstract

This invention provides an electrical equipment operation monitor and monitoring method, belonging to the field of electrical and electronic technology. The monitor includes: a multi-protocol serial transceiver circuit for connecting to electrical equipment with corresponding communication protocol interfaces and receiving the operating information of the electrical equipment; a signal conversion circuit for connecting to electrical equipment without corresponding communication protocol interfaces, receiving the operating information of the electrical equipment, and converting the information into a voltage signal; and a microcontroller connected to the multi-protocol serial transceiver circuit and the signal conversion circuit, for receiving the operating information of the electrical equipment from the multi-protocol serial transceiver circuit and / or the voltage signal from the signal conversion circuit, converting it into text format, and transmitting it to a storage device for storage. This invention receives and stores all information about the operation of the electrical equipment. When a fault occurs in the equipment, the corresponding operating information of the electrical equipment can be obtained at any time to solve the corresponding problem.

Description

Technical Field

[0001] This invention relates to the field of electrical and electronic technology, and more specifically to an electrical equipment operation monitor and monitoring method. Background Technology

[0002] The complexity of electrical instrumentation equipment on-site is increasing. Due to limitations in transmission channels, only a small portion of the equipment's operational information can be input into the control system. For example, with frequency converters, only the speed signal can be input into the DCS system according to design requirements. However, during actual operation, other information remains unavailable when needed. For instance, when a frequency converter malfunctions, it's necessary to retrieve its fault information, such as voltage, current, DC bus voltage, and charging current at the time of the fault. Using this information allows for analysis of the fault's cause, identification of the fault's characteristics, and prevention of recurrence.

[0003] However, current production and equipment sites cannot save this fault information, or can only save a small portion of the information. For example, for frequency converters, only the instantaneous information when a fault occurs can be saved. However, the strong interference that occurs when equipment fails, such as the instantaneous high voltage caused by a short circuit, interferes with the equipment itself, resulting in inaccurate stored data. It is difficult to analyze the cause of the fault by relying solely on the instantaneous information of the equipment when a fault occurs, which is saved by existing technology. Therefore, it is necessary to receive and save the information of electrical and instrumentation equipment during daily operation in order to monitor whether the electrical and instrumentation equipment is operating normally. Summary of the Invention

[0004] The purpose of this invention is to provide an electrical equipment operation monitor and monitoring method. This electrical equipment operation monitor is used to solve the deficiency of the prior art, which can only save instantaneous information when electrical equipment fails, but cannot save information on the daily operation of electrical equipment.

[0005] To address the aforementioned problems, this invention provides an electrical equipment operation monitor, comprising: a multi-protocol serial transceiver circuit for connecting to an electrical equipment with a corresponding communication protocol interface and receiving the operation information of the electrical equipment; a signal conversion circuit for connecting to an electrical equipment without a corresponding communication protocol interface, receiving the operation information of the electrical equipment, and converting the information into a voltage signal; and a microcontroller connected to the multi-protocol serial transceiver circuit and the signal conversion circuit for receiving the operation information of the electrical equipment from the multi-protocol serial transceiver circuit and / or the voltage signal from the signal conversion circuit, converting it into text format, and transmitting it to a storage device for storage.

[0006] In some embodiments, the multi-protocol serial transceiver circuit includes a multi-protocol serial transceiver and an optocoupler, wherein the multi-protocol serial transceiver is connected to the optocoupler, and the multi-protocol serial transceiver transmits the received operating information of the electrical instrument to the microcontroller after opto-isolation by the optocoupler. The microcontroller converts the operating information into a digital signal and then into a text format for storage.

[0007] In some embodiments, the microcontroller converts the voltage signal into a digital signal and then into a text format for storage.

[0008] In some embodiments, the monitor further includes a power supply circuit for providing power to the microcontroller.

[0009] In some embodiments, the power supply circuit includes a voltage regulator circuit and a battery circuit. The voltage regulator circuit includes a voltage regulator and an external power interface. The voltage regulator circuit stabilizes the voltage provided by the external power supply through the external power interface to a set voltage value and then supplies power to the microcontroller. The battery circuit is used to supply power to the microcontroller when the external power supply is turned off.

[0010] In some embodiments, the monitor further includes a clock circuit connected to the microcontroller, which is used to input corresponding time information into the microcontroller while the microcontroller receives the operating information of the electrical equipment. The clock circuit includes a first crystal oscillator and a second crystal oscillator.

[0011] In some embodiments, the monitor further includes a reset circuit connected to the microcontroller to ensure that the microcontroller starts running from the initial state when it restarts.

[0012] In some embodiments, the microcontroller transmits the operating information to the storage device via synchronous transmission.

[0013] In some embodiments, the monitor further includes a switch input circuit connected to the microcontroller, which transmits the switch information of the electrical instrument to the microcontroller, and the microcontroller converts the information into text format for storage.

[0014] In some embodiments, the microcontroller is an embedded system STM32V107.

[0015] In some embodiments, the corresponding communication protocol interface is an RS485 interface.

[0016] On the other hand, the present invention provides a method for monitoring the operation of electrical equipment, the method comprising: receiving operation information of electrical equipment having a corresponding communication protocol interface using a multi-protocol serial transceiver circuit, and converting the operation information into text format and inputting it into a storage device for storage using a microcontroller; and converting the operation information of electrical equipment without a corresponding communication protocol interface into a voltage signal using a signal conversion circuit and inputting it into the microcontroller, and converting the voltage signal into text format and inputting it into a storage device for storage using the microcontroller.

[0017] Through the above technical solution, this disclosure utilizes a multi-protocol serial transceiver circuit to receive operating information from electrical equipment with corresponding communication protocol interfaces. The received operating information is then input into a microcontroller, which converts this information into text format and stores it in a storage device. For electrical equipment without corresponding communication protocol interfaces, a signal conversion circuit converts the operating information into voltage signals, which are then input into the microcontroller. The microcontroller performs A / D conversion, converting the voltage signals into digital signals, and finally into text format for storage. This method allows for the reception and storage of all operating information from the electrical equipment, enabling real-time recording of all operating information, understanding of the equipment's operating status, and timely detection of abnormal performance changes. When equipment malfunctions, the operating information can provide crucial fault indications, helping technicians quickly locate the cause of the problem and shorten repair time.

[0018] Other features and advantages of the embodiments of the present invention will be described in detail in the following detailed description section. Attached Figure Description

[0019] The accompanying drawings are provided to further illustrate embodiments of the present invention and form part of the specification. They are used together with the following detailed description to explain the embodiments of the present invention, but do not constitute a limitation thereof. In the drawings:

[0020] Figure 1 This is a schematic diagram of the structure of the electrical equipment operation monitor provided in the embodiments of this disclosure;

[0021] Figure 2 This is a schematic diagram of the multi-protocol serial port transceiver circuit structure provided in the embodiments of this disclosure;

[0022] Figure 3 This is a schematic diagram of the power supply circuit provided in an embodiment of this disclosure;

[0023] Figure 4 This is a schematic diagram of the clock circuit provided in an embodiment of the present disclosure;

[0024] Figure 5This is a schematic diagram of the reset circuit provided in the embodiments of this disclosure;

[0025] Figure 6 This is a schematic diagram of the structure of the switch input circuit provided in the embodiments of this disclosure;

[0026] Figure 7 This is a schematic diagram of the debugging circuit provided in the embodiments of this disclosure;

[0027] Figure 8 This is a schematic diagram of the structure of the program input circuit provided in the embodiments of this disclosure;

[0028] Figure 9 This is a schematic diagram of the structure of the EEPROM circuit provided in the embodiments of this disclosure.

[0029] Explanation of reference numerals in the attached figures

[0030] 1. Microcontroller; 2. Multi-protocol serial transceiver circuit; 3. Signal conversion circuit; 4. Storage device; 5. Voltage regulator circuit; 6. Battery circuit. Detailed Implementation

[0031] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of the present invention.

[0032] It should be noted that the acquisition, transmission, storage, use, and processing of data in the technical solution of this application all comply with the relevant provisions of national laws and regulations. In the embodiments of this application, certain existing industry solutions such as software, components, and models may be mentioned. These should be considered exemplary, intended only to illustrate the feasibility of implementing the technical solution of this application, and do not imply that the applicant has already used or necessarily used such solutions.

[0033] Figure 1 This is a schematic diagram of the structure of the electrical equipment operation monitor provided in the embodiments of this disclosure. Figure 1 As shown, the monitor includes: a multi-protocol serial transceiver circuit for connecting to an electrical instrument with a corresponding communication protocol interface and receiving the operating information of the electrical instrument; a signal conversion circuit for connecting to an electrical instrument without a corresponding communication protocol interface, receiving the operating information of the electrical instrument, and converting the information into a voltage signal; and a microcontroller connected to the multi-protocol serial transceiver circuit and the signal conversion circuit for receiving the operating information of the electrical instrument from the multi-protocol serial transceiver circuit and / or the voltage signal from the signal conversion circuit, converting it into text format, and transmitting it to a storage device for storage.

[0034] Specifically, the microcontroller in this embodiment is an embedded system STM32V107. This system has 100 pins; apart from the power supply and crystal oscillator pins, the rest are input and output pins, totaling approximately 96. The STM32V107 embedded system uses the ARM series Core, and it has 256K flash memory, 64K SRAM, and a DAM storage system, making it very powerful. The multi-protocol serial transceiver circuit in this embodiment includes an SP3485 chip, therefore the corresponding communication protocol interface is RS485. The electrical device without the corresponding communication protocol interface is a motor. The storage device used in this embodiment is a USB flash drive, and the text format is TXT. Because the TXT format is easy for computers to read, a small amount of text can be used to store a large amount of data, and USB flash drives typically have a capacity of 128GB or more, they can store a large amount of information. Calculations show that a 128GB USB flash drive, saving data once per second, can store data from this electrical device for more than 30 years. Furthermore, the USB flash drive can be freely plugged in and out, and the saved contents can be viewed and retrieved on computers and mobile phones. However, it should be noted that those skilled in the art can replace different storage devices and choose different file saving formats according to actual needs.

[0035] Understandably, electrical equipment with a RS485 interface connects to the SP3485 to transmit its operational information. Since the STM32 microcontroller has an RS485 interface, the SP3485 can be directly connected to the STM32 microcontroller, outputting the operational information to the microcontroller. The microcontroller then processes the RS485 signal, converting it into a digital signal, and finally into a TXT format for storage on a USB flash drive. Furthermore, the STM32 microcontroller integrates the USB protocol, has a USB interface, and provides power to the USB port. Figure 1 The microcontroller's PA11 / PA12 ports directly lead to a USB data transfer interface, and the microcontroller's power supply uses a USB port HOST type, which can directly power the USB port. Furthermore, the microcontroller transmits the operating information of the electrical equipment to the USB port synchronously. Since asynchronous transmission lacks a clock signal, and storing the operating information of the electrical equipment requires time recording, synchronous transmission is used.

[0036] In this embodiment, the signal conversion circuit receives current input from electrical equipment lacking a 485 interface, such as a motor, and connects it to the PC0, PC1, and PC2 interfaces of the microcontroller. A resistor is incorporated into this circuit; the input current is multiplied by the resistor to convert it into a voltage, which is then transmitted to the microcontroller. The microcontroller performs an A / D conversion based on the voltage signal, converting the analog signal into a digital signal, and finally converting the digital signal into TXT format text information stored on a USB flash drive. By connecting the electrical equipment to the electrical equipment operation monitor provided in this embodiment, real-time operational information of the electrical equipment can be collected and stored. When it is necessary to find the cause of an accident or process flow data, the USB flash drive can be unplugged at any time, and the relevant data can be retrieved to resolve the problem.

[0037] Figure 2 This is a schematic diagram of the multi-protocol serial port transceiver circuit structure provided in an embodiment of this disclosure. Figure 2 As shown, the multi-protocol serial transceiver circuit includes a multi-protocol serial transceiver and an optocoupler. The multi-protocol serial transceiver is connected to the optocoupler. The multi-protocol serial transceiver transmits the received operating information of the electrical instrument to the microcontroller after opto-isolation by the optocoupler. The microcontroller converts the operating information into a digital signal and then into a text format for storage.

[0038] Specifically, the multi-protocol serial transceiver circuit includes a multi-protocol serial transceiver SP3485 and three optocouplers. Pins 485out+ and 485out- are used to connect to electrical equipment with a 485 interface. Pins 1, 3, and 4 of the SP3485 are each connected to an optocoupler, and through these optocouplers, they are connected to the 485TX interface of the microcontroller, opto-isolated the received signal before inputting it to the microcontroller.

[0039] The digital signal DI of the electrical equipment is opto-isolated, while the analog signal AI is amplified and shaped by an operational amplifier circuit before being output to the STM32. Additionally, the monitor implements RS485 opto-isolated transmission through three opto-isolated modules: SP3485 and DG1-DG3. The monitor is programmed using a combination of C language and the UCOS operating system, dividing the program into multiple parts. RS485, AI, and DI information are stored in the STM32's RAM via DMA, and then written to a USB flash drive using a file processing system via USB protocol.

[0040] In some embodiments, the monitor further includes a power supply circuit for providing power to the microcontroller.

[0041] Figure 3 This is a schematic diagram of the power supply circuit provided in an embodiment of this disclosure. Figure 3As shown, the power supply circuit includes a voltage regulator circuit and a battery circuit. The voltage regulator circuit includes a voltage regulator and an external power interface. The voltage regulator circuit stabilizes the voltage provided by the external power supply through the external power interface to a set voltage value before supplying power to the microcontroller. The battery circuit is used to supply power to the microcontroller when the external power supply is turned off.

[0042] Specifically, the voltage regulator circuit used in this embodiment includes an SPX1117 voltage regulator connected to capacitors C11 and C12, an external power supply interface, and an LED1. The external power supply is connected to the SPX1117 voltage regulator via the external power supply interface. The SPX1117 voltage regulator converts the 5V voltage provided by the external power supply to 3.3V before supplying it to the microcontroller, which receives the input through its 3.3V power port. The external power supply is connected to the SPX1117 voltage regulator via capacitor C11 to filter out interference signals in the 5V voltage provided by the external power supply. The SPX1117 voltage regulator is connected to the microcontroller via capacitor C12. Since the power consumption of the microcontroller may be uneven, capacitor C12 stabilizes the 3.3V voltage supplied to the microcontroller, thus acting as a filter. Furthermore, the battery circuit BT1 is connected to the microcontroller's VBAT (AT) interface, providing 3.3V power to the microcontroller when the external power supply is interrupted.

[0043] Figure 4 This is a schematic diagram of the clock circuit provided in an embodiment of this disclosure. Figure 4 As shown, the clock circuit is connected to the microcontroller and is used to input the corresponding time information into the microcontroller while the microcontroller receives the operating information of the electrical instrument.

[0044] Specifically, the clock circuit includes a first crystal oscillator CTAL and a second crystal oscillator CTAL2, with capacitors C1 and C2 connected to the two ends of the first crystal oscillator CTAL, and capacitor C1 and C2 connected to the two ends of the second crystal oscillator CTAL2, respectively. rt 1 and capacitor C rt 2. This clock circuit can save the current time when storing information from the electrical equipment to the microcontroller. Furthermore, the frequency of the first crystal oscillator (CTAL) is higher than that of the second crystal oscillator (CTAL2). The first crystal oscillator (CTAL) typically has a frequency of 37 MHz, while the second crystal oscillator (CTAL2) has a frequency of 37 kHz. If the timing accuracy is insufficient when using the first crystal oscillator (CTAL) alone, higher timing accuracy can be achieved by using it in conjunction with the second crystal oscillator (CTAL2).

[0045] Figure 5 This is a schematic diagram of the reset circuit provided in an embodiment of this disclosure. Figure 5As shown, the reset circuit is connected to the microcontroller via the REST pin, and the external power supply is connected to capacitor C3 and resistor Rr. Utilizing the characteristic that the capacitor's voltage cannot change abruptly, it ensures that the microcontroller starts running from its initial state upon restart. One end of capacitor C3 is grounded, so its voltage is 0V. When the microcontroller detects 0V and powers on, its program begins running. When the voltage reaches 3.3V, the microcontroller will not restart. However, when power is interrupted and then restored, the microcontroller needs to restart. The reset circuit controls this restart instead of starting from an intermediate state, preventing program corruption. Furthermore, capacitor C3 also serves to prevent interference.

[0046] Figure 6 This is a schematic diagram of the structure of the switch input circuit provided in the embodiments of this disclosure. Figure 6 As shown, this digital input circuit can be connected to a microcontroller via the PA0-PA7 interface to collect digital input information from electrical equipment and transmit it to the microcontroller, which then converts the information into text format for storage. Meanwhile, ports 1-20 on the DIS connector can also be used for other functions, such as acquiring current signals via the PA0-PA7 interface and inputting them to the microcontroller, or connecting a display via DIS(PE3)-DIS(PE5). Furthermore, DIS(PE0) is connected to the microcontroller's PE0 interface and an opto-isolator is connected to output information from the microcontroller; the PE0 interface flashes when the microcontroller is working normally. Resistor Rd2 is used to detect whether the DIS connector is in a normal state after an external power supply is connected. A normal state is indicated when the external power supply is on, and an abnormal state is indicated when the power supply is off.

[0047] Figure 7 This is a schematic diagram of the debugging circuit provided in an embodiment of this disclosure. Figure 7 As shown, the debugging circuit includes switches S1 and S2, capacitors Cw1 and Cw2, inductors Rw1 and Rw2, and is connected to the microcontroller via PC4 and PC5 interfaces. When debugging the microcontroller, the operation of switches S1 and S2 controls the microcontroller to save or stop saving information from the electrical equipment earlier than a preset time.

[0048] Figure 8 This is a schematic diagram of the program input circuit provided in an embodiment of this disclosure. This circuit is connected to a microcontroller to input the program that controls the microcontroller's operation.

[0049] Figure 9This is a schematic diagram of the EEPROM circuit provided in this embodiment. The circuit is connected to a microcontroller and uses an AT24LC02 chip to store fixed information in the microcontroller, and can still store information even when the power is off.

[0050] On the other hand, the present invention provides a method for monitoring the operation of electrical equipment, the method comprising: receiving operation information of electrical equipment having a corresponding communication protocol interface using a multi-protocol serial transceiver circuit, and converting the operation information into text format and inputting it into a storage device for storage using a microcontroller; and converting the operation information of electrical equipment without a corresponding communication protocol interface into a voltage signal using a signal conversion circuit and inputting it into the microcontroller, and converting the voltage signal into text format and inputting it into a storage device for storage using the microcontroller.

[0051] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0052] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0053] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0054] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0055] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0056] Memory may include non-persistent memory in computer-readable media, such as random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM. Memory is an example of computer-readable media.

[0057] Computer-readable media includes both permanent and non-permanent, removable and non-removable media that can store information using any method or technology. Information can be computer-readable instructions, data structures, modules of programs, or other data. Examples of computer storage media include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, CD-ROM, digital versatile optical disc (DVD) or other optical storage, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other non-transferable medium that can be used to store information accessible by a computing device. As defined herein, computer-readable media does not include transient computer-readable media, such as modulated data signals and carrier waves.

[0058] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0059] The above are merely embodiments of this application and are not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. An electrical equipment operation monitor, characterized in that, The monitor includes: A multi-protocol serial transceiver circuit is used to connect to electrical instruments with corresponding communication protocol interfaces and to receive the operating information of the electrical instruments. A signal conversion circuit is used to connect to electrical equipment that does not have a corresponding communication protocol interface, receive the operating information of the electrical equipment, and convert the information into a voltage signal; and A microcontroller, connected to the multi-protocol serial transceiver circuit and the signal conversion circuit, is used to receive the operating information of the electrical equipment from the multi-protocol serial transceiver circuit and / or the voltage signal from the signal conversion circuit, and convert them into text format for transmission to a storage device for storage.

2. The monitor according to claim 1, characterized in that, The multi-protocol serial transceiver circuit includes a multi-protocol serial transceiver and an optocoupler. The multi-protocol serial transceiver is connected to the optocoupler. The multi-protocol serial transceiver transmits the received operating information of the electrical equipment to the microcontroller after opto-isolation via the optocoupler. The microcontroller converts the operating information into digital signals and then into text format for storage.

3. The monitor according to claim 1, characterized in that, The microcontroller converts the voltage signal into a digital signal and then into a text format for storage.

4. The monitor according to claim 1, characterized in that, The monitor also includes a power supply circuit for providing power to the microcontroller.

5. The monitor according to claim 4, characterized in that, The power supply circuit includes a voltage regulator circuit and a battery circuit. The voltage regulator circuit includes a voltage regulator and an external power interface. The voltage regulator circuit stabilizes the voltage provided by the external power supply through the external power interface to a set voltage value and then supplies power to the microcontroller. The battery circuit is used to supply power to the microcontroller when the external power supply is interrupted.

6. The monitor according to claim 1, characterized in that, The monitor also includes a clock circuit connected to the microcontroller, which inputs corresponding time information into the microcontroller while the microcontroller receives the operating information of the electrical equipment. The clock circuit includes a first crystal oscillator and a second crystal oscillator.

7. The monitor according to claim 1, characterized in that, The monitor also includes a reset circuit connected to the microcontroller to ensure that the microcontroller starts running from the initial state when it restarts.

8. The monitor according to claim 1, characterized in that, The microcontroller transmits the operating information to the storage device via synchronous transmission.

9. The monitor according to claim 1, characterized in that, The monitor also includes a switch input circuit, which is connected to the microcontroller and is used to transmit the switch information of the electrical instrument to the microcontroller, which then converts the information into text format for storage.

10. The monitor according to claim 1, characterized in that, The microcontroller is an embedded system STM32V107.

11. The monitor according to claim 1, characterized in that, The corresponding communication protocol interface is an RS485 interface.

12. A method for monitoring the operation of electrical equipment, characterized in that, The method includes: The system uses a multi-protocol serial transceiver circuit to receive operating information from electrical equipment with corresponding communication protocol interfaces, and then uses a microcontroller to convert the operating information into text format and input it into a storage device for storage; and The operating information of electrical instruments that do not have a corresponding communication protocol interface is converted into a voltage signal by a signal conversion circuit and input to the microcontroller. The microcontroller then converts the voltage signal into a text format and inputs it to a storage device for storage.

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