4G wireless audio and video acquisition and transmission device, method and system for remote maintenance of equipment

Abstract

The invention is suitable for the technical field of equipment maintenance, and provides a 4G wireless audio and video acquisition and transmission device, method and system for equipment remote maintenance. The device comprises a main control circuit module, a camera module, an audio module, a 4G wireless transmission module and a power supply module. The camera module is used for collecting video image information of a maintenance site; the audio module is used for acquiring an audio signal and outputting the audio signal; each module is connected with the main control circuit module; the main control circuit module is used for processing the video image information and the audio signal and carrying out coordination control and resource configuration; the 4G wireless transmission module is used for transmitting the processed video image information and audio signals to a maintenance center server through a 4G wireless network; the power module is used for supplying power to each module. The requirement of audio and video collection and transmission on an equipment maintenance site under the field condition can be met.

Description

Technical Field

[0001] The present application belongs to the technical field of equipment maintenance, and in particular, relates to a 4G wireless audio and video acquisition and transmission device, method and system for remote maintenance of equipment. Background Art

[0002] At the equipment maintenance site, in order to obtain technical support from remote experts, it is necessary to transmit the audio and video of the maintenance site to the equipment maintenance information center. Traditional audio and video acquisition and transmission systems basically use wired networking, which has the advantages of mature technology, less susceptible to interference, reduced signal attenuation, high reliability, and fast transmission speed.

[0003] However, under field conditions, the equipment maintenance site has the characteristics of uncertain location and wide distribution, relatively remote location, and long distance from the maintenance center. There are no available wired network resources at the field maintenance site, and it is far away from the maintenance center, making it difficult to lay network cables. Even if network cables are laid, they are constrained by transmission cables and network cables and are not flexible to move. Many cables are required, the cost is high, debugging is difficult, and there are many disadvantages such as narrow coverage and high maintenance costs.

[0004] With the rapid development of wireless communication technology, especially the continuous development and improvement of 4G technology, it has become possible to collect and transmit audio and video based on 4G wireless network. How to use 4G wireless network to meet the needs of audio and video collection and transmission at the equipment maintenance site under field conditions is an urgent problem to be solved. Summary of the invention

[0005] In order to overcome the problems existing in the related art, the embodiments of the present application provide a 4G wireless audio and video acquisition and transmission device, method and system for remote equipment maintenance, which can meet the needs of audio and video acquisition and transmission on-site of equipment maintenance under field conditions.

[0006] This application is implemented through the following technical solutions:

[0007] In a first aspect, an embodiment of the present application provides a 4G wireless audio and video acquisition and transmission device for remote maintenance of equipment, including a main control circuit module, a camera module, an audio module, a 4G wireless transmission module and a power module;

[0008] The camera module is used to collect video image information at the maintenance site;

[0009] The audio module is used to obtain audio signals and output audio signals;

[0010] The camera module, audio module and 4G wireless transmission module are respectively connected to the main control circuit module; the main control circuit module is used to process video image information and audio signals, and to coordinate control and resource allocation;

[0011] The 4G wireless transmission module is used to transmit the processed video image information and the processed audio signal to the maintenance center server through the 4G wireless network;

[0012] The camera module, audio module, main control circuit module and 4G wireless transmission module are respectively connected to the power module; the power module is used to supply power to the main control circuit module, camera module, audio module and 4G wireless transmission module.

[0013] In a possible implementation of the first aspect, the main control circuit module includes a main control processor, a data storage module, an LCD display circuit, an external communication circuit, and a peripheral circuit;

[0014] The main control processor includes a first chip; the first chip has a built-in DRAM memory; the data storage module, the LCD display circuit, the external communication circuit and the peripheral circuit are respectively connected to the first chip;

[0015] The data storage module includes a NAND Flash chip, an SD card, and an internal on-chip memory; the NAND Flash chip stores U-boot system startup code, Linux kernel code, file system code, and application programs; the SD card is used to store video image information and audio signals; the internal on-chip memory is used to access program data when the system is running, as well as to receive video image information and audio signals;

[0016] The external communication circuit includes a first serial communication interface, a second serial communication interface, an I2C serial communication interface, an Ethernet interface and a WIFI interface; the first serial communication interface is used to communicate with the host computer; the second serial communication interface is connected to the 4G wireless communication module for data transmission with the 4G wireless communication module; the Ethernet interface is used for wired communication; the WIFI interface is used for wireless communication;

[0017] The peripheral circuit includes crystal oscillator circuit, reset circuit, external button and display circuit; the crystal oscillator circuit is used to provide the required 24M and 32K external clocks for the main control processor; the reset circuit is used for system reset; the external button circuit and display circuit are used for mode switching, mode selection and function indication.

[0018] In a possible implementation of the first aspect, the camera module includes a second chip, a three-terminal voltage stabilizing filter circuit, and a light emitting diode circuit;

[0019] The three-terminal voltage stabilizing filter circuit includes a first voltage stabilizing filter circuit, a second voltage stabilizing filter circuit and a third voltage stabilizing filter circuit;

[0020] The serial data pin SDA of the second chip is connected to the serial data pin of the first chip; the serial clock pin SCL of the second chip is connected to the serial clock pin of the first chip; the 8-bit pixel data pins D0-D7 of the second chip are respectively connected to the GPIO port of the first chip; the frame synchronization signal pin of the second chip is connected to the frame synchronization signal receiving pin of the first chip; the frame synchronization signal pin of the second chip is used to output the frame synchronization signal VSYNC and the line synchronization signal HSYNC; the pixel output clock pin PCLK of the second chip is connected to the pixel output clock signal receiving pin of the first chip;

[0021] The analog voltage pin of the second chip is connected to the third voltage control port of the third voltage stabilizing and filtering circuit; the working voltage pin of the second chip is respectively connected to the second voltage control port of the first voltage stabilizing and filtering circuit and the voltage control port of the second voltage stabilizing and filtering circuit; the digital voltage pin of the second chip is connected to the fourth voltage control port of the third voltage stabilizing and filtering circuit.

[0022] In a possible implementation of the first aspect, the first voltage stabilizing filter circuit includes a first inductor, a second inductor, a first capacitor, a second capacitor, a third capacitor, and a first voltage control chip;

[0023] The first voltage control port of the first voltage stabilizing filter circuit is connected to the first end of the first inductor; the second end of the first inductor is respectively connected to the first end of the first capacitor and the input end of the first voltage control chip; the output end of the first voltage control chip is connected to the first end of the second inductor; the second end of the second inductor is respectively connected to the first end of the second capacitor, the first end of the third capacitor and the second voltage control port of the first voltage stabilizing filter circuit; the second end of the first capacitor, the ground end of the first voltage control chip, the second end of the second capacitor and the second end of the third capacitor are all grounded;

[0024] The second voltage stabilizing filter circuit includes a fourth capacitor; the voltage control port of the second voltage stabilizing filter circuit is connected to the first end of the fourth capacitor; the second end of the fourth capacitor is grounded;

[0025] The third voltage stabilizing filter circuit includes a fifth capacitor, a sixth capacitor, a seventh capacitor, an eighth capacitor, a ninth capacitor, a tenth capacitor, an eleventh capacitor, a third inductor, a fourth inductor and a second voltage control chip;

[0026] The first voltage control port of the third voltage stabilizing and filtering circuit is respectively connected to the first end of the fifth capacitor and the input end of the second voltage control chip; the output end of the second voltage control chip is respectively connected to the first end of the sixth capacitor, the first end of the seventh capacitor, the second voltage control port of the third voltage stabilizing and filtering circuit, the first end of the third inductor and the first end of the fourth inductor; the second end of the third inductor is respectively connected to the first end of the eighth capacitor, the first end of the ninth capacitor and the third voltage control port of the third voltage stabilizing and filtering circuit; the second end of the fourth inductor is respectively connected to the first end of the tenth capacitor, the first end of the eleventh capacitor and the fourth voltage control port of the third voltage stabilizing and filtering circuit; the second end of the fifth capacitor, the ground end of the second voltage control chip, the second end of the sixth capacitor, the second end of the seventh capacitor, the second end of the eighth capacitor, the second end of the ninth capacitor, the second end of the tenth capacitor and the second end of the eleventh capacitor are all grounded.

[0027] In a possible implementation of the first aspect, the first voltage port of the light emitting diode circuit is connected to the first voltage control port of the third voltage stabilizing filter circuit; the light emitting diode circuit is used to provide a light source for the camera module;

[0028] The light emitting diode circuit comprises a first light emitting diode, a second light emitting diode, a first MOS tube and a first resistor;

[0029] The first voltage port of the light-emitting diode circuit is respectively connected to the anode of the first light-emitting diode and the anode of the second light-emitting diode; the cathode of the first light-emitting diode is respectively connected to the cathode of the second light-emitting diode and the D pole of the first MOS tube; the G pole of the first MOS tube is respectively connected to the first end of the first resistor and the detection overvoltage protection port of the light-emitting diode circuit; the second end of the first resistor and the S pole of the first MOS tube are both grounded.

[0030] In a possible implementation of the first aspect, the audio module includes an audio signal input circuit and an audio signal output circuit;

[0031] The audio signal input circuit includes a microphone input unit, a twelfth capacitor, a thirteenth capacitor, a fourteenth capacitor, a fifteenth capacitor, a sixteenth capacitor, a seventeenth capacitor, a second resistor and a third resistor;

[0032] The positive electrode of the microphone input unit is respectively connected to the first end of the thirteenth capacitor, the first end of the fifteenth capacitor, the first end of the second resistor and the first end of the fourteenth capacitor; the second end of the second resistor is connected to the first end of the twelfth capacitor; the second end of the fourteenth capacitor is connected to the first differential signal output terminal; the negative electrode of the microphone input unit is respectively connected to the second end of the fifteenth capacitor, the first end of the sixteenth capacitor, the first end of the third resistor and the first end of the seventeenth capacitor; the second end of the seventeenth capacitor is connected to the second differential signal output terminal; the second end of the twelfth capacitor, the second end of the thirteenth capacitor, the second end of the sixteenth capacitor and the second end of the third resistor are all grounded;

[0033] The audio signal output circuit includes a speaker audio output unit, a fourth resistor, a fifth resistor, a sixth resistor, an eighteenth capacitor and a nineteenth capacitor;

[0034] The first end of the speaker audio output unit is connected to the first end of the fourth resistor; the second end of the fourth resistor is respectively connected to the bias voltage control port and the first end of the eighteenth capacitor; the second end of the speaker audio output unit is connected to the right channel output port; the third end of the speaker audio output unit is connected to the left channel output port; the fourth end of the speaker audio output unit is respectively connected to the common port, the first end of the nineteenth capacitor and the first end of the sixth resistor; the second end of the sixth resistor is connected to the common feedback port; the second end of the nineteenth capacitor is connected to the first end of the fifth resistor; the second end of the eighteenth capacitor and the second end of the fifth resistor are both grounded.

[0035] In a possible implementation of the first aspect, the 4G wireless transmission module is connected to the USB differential data terminal of the main control processor; the 4G wireless transmission module includes a network communication circuit and a SIM card circuit;

[0036] The network communication circuit includes a third chip, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor and an electrostatic protection component;

[0037] The USB differential data positive electrode of the third chip is respectively connected to the first end of the ninth resistor and the first end of the seventh resistor; the second end of the ninth resistor is respectively connected to the first test endpoint and the first end of the electrostatic protection component array; the second end of the seventh resistor is connected to the USB differential data positive electrode of the first chip; the USB differential data negative electrode of the third chip is respectively connected to the first end of the tenth resistor and the first end of the eighth resistor; the second end of the tenth resistor is respectively connected to the second test endpoint and the second end of the electrostatic protection component array; the second end of the eighth resistor is connected to the USB differential data negative electrode of the first chip; the third end of the electrostatic protection component array is grounded;

[0038] The SIM card circuit includes a SIM chip, a TSV diode array, an eleventh resistor, a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a twentieth capacitor, a twenty-first capacitor, a twenty-second capacitor, and a twenty-third capacitor; the distance between the SIM chip and the third chip is less than a preset value;

[0039] The power input end of the SIM chip is respectively connected to the first end of the twentieth capacitor, the fifth end of the TSV diode array and the working voltage port; the reset signal input end of the SIM chip is respectively connected to the first end of the eleventh resistor and the fourth end of the TSV diode array; the second end of the eleventh resistor is connected to the reset control port; the clock signal input end of the SIM chip is respectively connected to the first end of the twelfth resistor and the third end of the TSV diode array; the second end of the twelfth resistor is respectively connected to the clock control port, the first end of the twentieth capacitor and the first end of the twenty-first capacitor; the serial input and output data end is respectively connected to the sixth end of the TSV diode array, the first end of the twenty-third capacitor, the first end of the fourteenth resistor and the first end of the thirteenth resistor; the second end of the thirteenth resistor is connected to the data transmission control end; the second end of the fourteenth resistor is connected to the working voltage port; the second end of the twentieth capacitor, the second end of the twenty-first capacitor, the second end of the twenty-second capacitor, the second end of the twenty-third capacitor and the second end of the TSV diode array are all grounded.

[0040] In a possible implementation of the first aspect, the power module includes a power management chip; the power management chip has a built-in three-way synchronous power-off module and a compensation circuit.

[0041] In a second aspect, an embodiment of the present application provides a 4G wireless audio and video acquisition and transmission method for remote maintenance of equipment, which is applied to a main control circuit module of a 4G wireless audio and video acquisition and transmission device for remote maintenance of equipment in the first aspect. The 4G wireless audio and video acquisition and transmission method for remote maintenance of equipment includes:

[0042] Control the camera module to collect video image information of the maintenance site and the audio module to obtain audio signals of the maintenance site;

[0043] Compress and fuse video image information and audio signals;

[0044] Transmit the processed video image information and the processed audio signal to the maintenance center server via the 4G wireless network; or

[0045] The video image information and audio signal uploaded by the maintenance center server are processed, and the processed video image information and audio signal uploaded by the maintenance center server are output.

[0046] In a third aspect, the present application provides a remote equipment maintenance system, including a 4G wireless audio and video acquisition and transmission device for remote equipment maintenance as in the first aspect.

[0047] It can be understood that the beneficial effects of the second to third aspects mentioned above can be found in the relevant description of the first aspect mentioned above, and will not be repeated here.

[0048] Compared with the prior art, the embodiments of the present invention have the following beneficial effects:

[0049] In the embodiment of the present application, the video image information of the maintenance site can be captured in real time through the integrated camera module, providing an intuitive on-site picture for the remote maintenance expert. At the same time, the addition of the audio module ensures the smoothness of two-way voice communication, so that the maintenance expert can clearly hear the on-site sound and give guidance. As the core of the device, the main control circuit module is not only responsible for processing video image information and audio signals, but also undertakes the important tasks of coordination control and resource allocation, ensuring that the device can operate stably in a complex and changeable field environment, and flexibly adjust the working state according to actual needs. Crucially, the application of the 4G wireless transmission module enables audio and video data to be quickly transmitted to the maintenance center server through the 4G wireless network, greatly broadening the coverage of maintenance services, so that even in remote or poor signal field areas, remote guidance and technical support for equipment maintenance can be achieved. The device is designed for equipment maintenance sites under field conditions and can efficiently meet the needs of audio and video acquisition and transmission.

[0050] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present specification. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0052] Figure 1 This is a schematic diagram of an application scenario of a 4G wireless audio and video acquisition and transmission device for remote maintenance of equipment provided by an embodiment of the present application;

[0053] Figure 2 It is a structural diagram of a 4G wireless audio and video acquisition and transmission device for remote maintenance of equipment provided by an embodiment of the present application;

[0054] Figure 3 is a schematic diagram of the structure of a second chip provided in an embodiment of the present application;

[0055] Figure 4 is a schematic diagram of the structure of a three-terminal voltage stabilizing filter circuit provided by an embodiment of the present application, wherein: Figure 4(a) is a schematic diagram of the structure of the first voltage stabilizing filter circuit. Figure 4 (b) is a schematic diagram of the structure of the second voltage stabilizing filter circuit. Figure 4 (c) is a schematic diagram of the structure of the third voltage stabilizing filter circuit;

[0056] Figure 5 is a structural schematic diagram of a light emitting diode circuit provided by an embodiment of the present application;

[0057] Figure 6 is a structural diagram of an audio module provided in an embodiment of the present application; Figure 6 (a) is a schematic diagram of the structure of the audio signal input circuit. Figure 6 (b) is a schematic diagram of the structure of the audio signal output circuit;

[0058] Figure 7 It is a schematic diagram of the structure and connection of a network communication circuit provided in an embodiment of the present application;

[0059] Figure 8 It is a structural schematic diagram of a SIM card circuit provided by an embodiment of the present application;

[0060] Fig. 9 is a schematic diagram of the structure of a power management chip provided in one embodiment of the present application;

[0061] Fig.10 It is a schematic diagram of the structure of a controller provided in one embodiment of the present application. DETAILED DESCRIPTION

[0062] In the following description, specific details such as specific system structures, technologies, etc. are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present application. However, it should be clear to those skilled in the art that the present application may also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to prevent unnecessary details from obstructing the description of the present application.

[0063] It should be understood that when used in the present specification and the appended claims, the term "comprising" indicates the presence of described features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or combinations thereof.

[0064] It should also be understood that the term “and / or” used in the specification and appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0065] As used in the specification and appended claims of this application, the term "if" can be interpreted as "when" or "uponce" or "in response to determining" or "in response to detecting", depending on the context. Similarly, the phrase "if it is determined" or "if [described condition or event] is detected" can be interpreted as meaning "uponce it is determined" or "in response to determining" or "uponce [described condition or event] is detected" or "in response to detecting [described condition or event]", depending on the context.

[0066] In addition, in the description of the present application specification and the appended claims, the terms "first", "second", "third", etc. are only used to distinguish the descriptions and cannot be understood as indicating or implying relative importance.

[0067] References to "one embodiment" or "some embodiments" etc. described in the specification of this application mean that one or more embodiments of the present application include specific features, structures or characteristics described in conjunction with the embodiment. Therefore, the statements "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc. that appear in different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "including", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized in other ways.

[0068] The 4G wireless audio and video acquisition and transmission module combines 4G wireless network technology with audio and video image acquisition and transmission technology, overcoming the deficiencies and shortcomings of traditional wired network audio and video transmission systems. It has the advantages of wide network coverage, flexible networking, few time and geographical restrictions, good scalability, and suitability for mobile devices. These features meet the needs of audio and video acquisition and transmission at equipment maintenance sites under field conditions.

[0069] Therefore, this application aims to meet the needs of on-site audio and video acquisition and transmission during equipment maintenance in the field. It uses 4G wireless network to enable audio and video data to be quickly transmitted to the maintenance center server, greatly broadening the coverage of maintenance services, so that even in remote or poor signal areas, remote guidance and technical support for equipment maintenance can be achieved.

[0070] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0071] Figure 1 This is a schematic diagram of an application scenario of a 4G wireless audio and video acquisition and transmission device for remote maintenance of equipment provided by an embodiment of the present application, with reference to Figure 1In response to the audio and video acquisition and transmission needs of equipment maintenance sites under field conditions, portable maintenance equipment with 4G wireless communication function is used to collect and transmit audio and video of the maintenance site. Portable maintenance equipment can be used to perform real-time on-site maintenance of missile equipment, and the video information and voice information of the maintenance site are connected to the Internet through the 4G wireless network base station through the 4G audio and video acquisition and transmission module, so as to quickly access the equipment maintenance information center, store audio and video images in the server of the maintenance information center, and interact with the remote maintenance information center to provide remote expert technical support for on-site maintenance personnel. Since the 4G wireless network signal has a wide coverage area and is not limited by remote areas in the field and the maintenance distance range, the maintenance information network can be accessed at any location on the maintenance site, meeting the needs of audio and video transmission of equipment maintenance sites under field conditions.

[0072] Figure 2 This is a schematic diagram of the structure of a 4G wireless audio and video acquisition and transmission device for remote maintenance of equipment provided by an embodiment of the present application, referring to Figure 2 The details of the remote maintenance of the 4G wireless audio and video acquisition and transmission device are as follows:

[0073] An embodiment of the present application provides a 4G wireless audio and video acquisition and transmission device for remote equipment maintenance, which is integrated on the above-mentioned portable maintenance equipment for audio and video acquisition and transmission at the maintenance site under field conditions, and includes a main control circuit module, a camera module, an audio module, a 4G wireless transmission module and a power module.

[0074] The camera module is used to collect video image information at the maintenance site.

[0075] The audio module is used to obtain audio signals and output audio signals.

[0076] The camera module, audio module and 4G wireless transmission module are respectively connected to the main control circuit module; the main control circuit module is used to process video image information and audio signals, and perform coordinated control and resource allocation.

[0077] The 4G wireless transmission module is used to transmit the processed video image information and the processed audio signal to the maintenance center server through the 4G wireless network.

[0078] The camera module, audio module, main control circuit module and 4G wireless transmission module are respectively connected to the power module; the power module is used to supply power to the main control circuit module, camera module, audio module and 4G wireless transmission module.

[0079] This embodiment can capture the video image information of the maintenance site in real time through the integrated camera module, providing intuitive on-site images for remote maintenance experts. At the same time, the addition of the audio module ensures the smoothness of two-way voice communication, allowing maintenance experts to clearly hear the on-site sound and give guidance. As the core of the device, the main control circuit module is not only responsible for processing video image information and audio signals, but also undertakes the important tasks of coordination control and resource allocation, ensuring that the device can operate stably in a complex and changeable field environment and flexibly adjust the working state according to actual needs. Crucially, the application of the 4G wireless transmission module enables audio and video data to be quickly transmitted to the maintenance center server through the 4G wireless network, greatly broadening the coverage of maintenance services, so that even in remote or poor signal areas in the field, remote guidance and technical support for equipment maintenance can be achieved. The device is designed for equipment maintenance sites under field conditions and can efficiently meet the needs of audio and video acquisition and transmission.

[0080] In one embodiment, the main control module is the core of the 4G wireless video image acquisition and transmission module, and the main control circuit module may include a main control processor, a data storage module, an LCD display circuit, an external communication circuit and a peripheral circuit.

[0081] The main control processor comprises a first chip; the first chip has a built-in DRAM memory; the data storage module, the LCD display circuit, the external communication circuit and the peripheral circuit are respectively connected to the first chip.

[0082] Among them, considering the requirements of small size, low power consumption, cost performance and high integration of the device-side hardware design, the first chip can be the V3S chip. The processor of the V3S chip is based on the ARM Cortex-A7 architecture, with a main frequency of 1.2GHz, fast running speed, low power consumption, integrated Hawk View ISP, and supports up to 5M processing; supports 1080P@60fps H.264 encoding and 1080PMJEPG to 1080P H.264 re-encoding. It has a built-in 64M DRAM memory, uses internal on-chip memory, integrates 512M DDR2 (double-rate synchronous dynamic random access memory) and Ethernet, audio interface, and supports Linux operating system.

[0083] The data storage module includes NAND Flash chip, SD card and internal on-chip memory. In order to reduce the size of the device, the number of NAND Flash chip, SD card and internal on-chip memory is 1, and the model of NAND Flash chip can be selected as 25Q128. The NAND Flash chip stores U-boot system startup code, Linux kernel code, file system code and application program. The size of SD card can be 32G, and SD card is used to store video image information and audio signal; the internal on-chip memory SDRAM is used for accessing program data when the system is running, as well as receiving and processing video image information and audio signal.

[0084] The external communication circuit includes a first serial communication interface, a second serial communication interface, an I2C serial communication interface, an Ethernet interface, and a WIFI interface. The first serial communication interface is used to communicate with the host computer, such as receiving commands from the host computer, reporting data results, etc. The second serial communication interface is connected to the 4G wireless communication module for data transmission with the 4G wireless communication module. The Ethernet interface is used for wired communication; the WIFI interface is used for wireless communication.

[0085] The peripheral circuit includes crystal oscillator circuit, reset circuit, external button and display circuit; the crystal oscillator circuit is used to provide the required 24M and 32K external clocks for the main control processor; the reset circuit is used for system reset; the external button circuit and display circuit are used for mode switching, mode selection and function indication.

[0086] In this embodiment, by integrating the main control processor, data storage module, LCD display circuit, external communication circuit and peripheral circuit, a high degree of hardware integration is achieved, and the modular design makes the system construction, debugging and maintenance more convenient, and at the same time improves the reliability and stability of the system. The main control processor adopts the first chip (V3S chip) and has a built-in DRAM memory, so that the system can efficiently process a large amount of data, and provides sufficient computing power for the system to run complex applications, process video image information and audio signals. The external communication circuit includes a variety of communication interfaces, such as a serial communication interface, an I2C serial communication interface, an Ethernet interface and a WIFI interface, so that the system can communicate data with different types of external devices. This design not only improves the scalability of the system, but also enables the system to adapt to different application scenarios. The peripheral circuit includes a crystal oscillator circuit, a reset circuit, an external button and a display circuit, which provide the system with necessary clock signals, reset functions and user interaction interfaces. The crystal oscillator circuit ensures the accuracy of the system clock, the reset circuit provides a reliable reset function for the system, and the external button and display circuit enable users to easily control the system and obtain system status information.

[0087] In one embodiment, see Figures 3 to 5, Figure 3 is a schematic diagram of the structure of the second chip, Figure 4 It is a schematic diagram of the structure of a three-terminal voltage stabilizing filter circuit, where: Figure 4 (a) is a schematic diagram of the structure of the first voltage stabilizing filter circuit. Figure 4 (b) is a schematic diagram of the structure of the second voltage stabilizing filter circuit. Figure 4 (c) is a schematic diagram of the structure of the third voltage stabilizing filter circuit; Figure 5 The camera module includes a second chip, a three-terminal voltage stabilizing filter circuit and a light emitting diode circuit.

[0088] For example, the camera module is used to collect video image information of the maintenance site. Since the CMOS image sensor has the characteristics of high integration, small size and low cost, the camera module can adopt a multifunctional VGA type CMOS camera module GC0308.

[0089] The peripheral power supply of the camera module uses a three-terminal voltage stabilizing filter circuit to output the 1.5V, 2.8V, and 2.5V DC voltages required by GC0308. The three-terminal voltage stabilizing filter circuit includes a first voltage stabilizing filter circuit, a second voltage stabilizing filter circuit, and a third voltage stabilizing filter circuit.

[0090] Exemplarily, the serial data pin SDA of the second chip M1 is connected to the serial data pin of the first chip; the serial clock pin SCL of the second chip M1 is connected to the serial clock pin of the first chip; before starting the image sensor module to work, the working mode of GC0308 is set through the I2C bus. The 8-bit pixel data pins D0-D7 of the second chip M1 are respectively connected to the GPIO port of the first chip; the frame synchronization signal pin of the second chip M1 is connected to the frame synchronization signal receiving pin of the first chip; the frame synchronization signal pin of the second chip M1 is used to output the frame synchronization signal VSYNC and the line synchronization signal HSYNC; the pixel output clock pin PCLK of the second chip M1 is connected to the pixel output clock signal receiving pin of the first chip.

[0091] The analog voltage pin of the second chip M1 is connected to the third voltage control port AVDD of the third voltage stabilizing and filtering circuit; the working voltage pin of the second chip M1 is respectively connected to the second voltage control port VCC1.5 of the first voltage stabilizing and filtering circuit and the voltage control port 1.5V of the second voltage stabilizing and filtering circuit; the digital voltage pin of the second chip M1 is connected to the fourth voltage control port DOVDD of the third voltage stabilizing and filtering circuit.

[0092] The second chip M1GC0308 is connected to the first chip V3S using a DVP parallel interface. The pixel data output control circuit includes a frame synchronization signal VSYNC, a line synchronization signal HSYNC and a pixel output clock signal PCLK. When the second chip M1GC0308 works in a progressive scanning mode, the frame synchronization signal first triggers the start of a frame of data, and then the line synchronization signal starts to trigger the specified number of rows where the pixels are located, preparing for the output of a row of data. Finally, under the action of the synchronous pixel clock signal, the sensor outputs each pixel data from left to right in turn. Based on the characteristics of the pixel output timing control circuit, the DMA transmission method is used to realize the acquisition of video image data, thereby reducing the burden of the processor receiving a large amount of image data.

[0093] Exemplarily, the first voltage stabilizing filter circuit includes a first inductor L1, a second inductor L2, a first capacitor C1, a second capacitor C2, a third capacitor C3 and a first voltage control chip U1, such as Figure 4 As shown in (a) in .

[0094] The first voltage control port VCC2.8 of the first voltage stabilizing and filtering circuit is connected to the first end of the first inductor L1; the second end of the first inductor L1 is respectively connected to the first end of the first capacitor C1 and the input end VIN of the first voltage control chip U1; the output end VOUT of the first voltage control chip U1 is connected to the first end of the second inductor L2; the second end of the second inductor L2 is respectively connected to the first end of the second capacitor C2, the first end of the third capacitor C3 and the second voltage control port VCC1.5 of the first voltage stabilizing and filtering circuit; the second end of the first capacitor C1, the ground end of the first voltage control chip U1, the second end of the second capacitor C2 and the second end of the third capacitor C3 are all grounded.

[0095] The second voltage stabilizing filter circuit includes a fourth capacitor C4; a voltage control port VCC1.5 of the second voltage stabilizing filter circuit is connected to a first end of the fourth capacitor C4; a second end of the fourth capacitor C4 is grounded. Figure 4 As shown in (b) in .

[0096] The third voltage stabilizing filter circuit includes a fifth capacitor C5, a sixth capacitor C6, a seventh capacitor C7, an eighth capacitor C8, a ninth capacitor C9, a tenth capacitor C10, an eleventh capacitor C11, a third inductor L3, a fourth inductor L4 and a second voltage control chip U2. Figure 4 As shown in (c) in .

[0097] The first voltage control port VCC2.8 of the third voltage stabilizing and filtering circuit is respectively connected to the first end of the fifth capacitor C5 and the input end of the second voltage control chip U2; the output end of the second voltage control chip U2 is respectively connected to the first end of the sixth capacitor C6, the first end of the seventh capacitor C7, the second voltage control port of the third voltage stabilizing and filtering circuit, the first end of the third inductor L3 and the first end of the fourth inductor L4; the second end of the third inductor L3 is respectively connected to the first end of the eighth capacitor C8, the first end of the ninth capacitor C9 and the third voltage control port of the third voltage stabilizing and filtering circuit; the second end of the fourth inductor L4 is respectively connected to the first end of the tenth capacitor C10, the first end of the eleventh capacitor C11 and the fourth voltage control port of the third voltage stabilizing and filtering circuit; the second end of the fifth capacitor C5, the ground end of the second voltage control chip U2, the second end of the sixth capacitor C6, the second end of the seventh capacitor C7, the second end of the eighth capacitor C8, the second end of the ninth capacitor C9, the second end of the tenth capacitor C10 and the second end of the eleventh capacitor C11 are all grounded.

[0098] Exemplarily, the first voltage control port VCC2.8 of the first voltage stabilizing filter circuit indicates that the control voltage of the first voltage control port of the first voltage stabilizing filter circuit is 2.8V, and the second voltage control port VCC1.5 of the first voltage stabilizing filter circuit indicates that the control voltage of the second voltage control port of the first voltage stabilizing filter circuit is 1.5V. Similar expressions follow the same description rules.

[0099] Exemplarily, the first voltage port of the light emitting diode circuit is connected to the first voltage control port VCC2.8 of the third voltage stabilizing filter circuit; the light emitting diode circuit is used to provide a light source for the camera module, such as Figure 5 shown.

[0100] The light emitting diode circuit includes a first light emitting diode LED1, a second light emitting diode LED2, a first MOS tube and a first resistor R1.

[0101] The first voltage port VCC3.3 of the light-emitting diode circuit is respectively connected to the anode of the first light-emitting diode LED1 and the anode of the second light-emitting diode LED2; the cathode of the first light-emitting diode LED1 is respectively connected to the cathode of the second light-emitting diode LED2 and the D pole of the first MOS tube; the G pole of the first MOS tube is respectively connected to the first end of the first resistor R1 and the detection overvoltage protection port OV_LED of the light-emitting diode circuit; the second end of the first resistor R1 and the S pole of the first MOS tube are both grounded.

[0102] This embodiment provides a stable and filtered power supply voltage for the second chip in the camera module through the design of a three-terminal voltage stabilizing filter circuit. This helps to reduce the impact of power supply fluctuations on chip performance and ensure the stable operation of the camera module. In particular, the first voltage stabilizing filter circuit and the second voltage stabilizing filter circuit provide precise voltage control for different operating voltage requirements of the chip, and the third voltage stabilizing filter circuit further meets the separation requirements of analog voltage and digital voltage, reducing mutual interference. The connection of the serial data pin SDA, the serial clock pin SCL and the 8-bit pixel data pin D0-D7 between the second chip and the first chip realizes efficient data transmission. This connection method not only improves the data transmission rate, but also ensures the accuracy and integrity of the data. The connection of the frame synchronization signal pin and the pixel output clock pin PCLK further ensures that the camera module can output image data according to a predetermined timing, thereby improving the efficiency and quality of image processing. The design of the light emitting diode circuit provides an additional light source for the camera module, which helps to improve the clarity and brightness of the image in an environment with insufficient light. At the same time, through the coordinated use of the first MOS tube and the first resistor, overvoltage protection of the light emitting diode circuit is realized, and the reliability and safety of the circuit are improved.

[0103] In one embodiment, see Figure 6 , Figure 6 It is a structural diagram of the audio module. Figure 6 (a) is a schematic diagram of the structure of the audio signal input circuit. Figure 6 (b) is a schematic diagram of the structure of the audio signal output circuit. Since the main control processor has integrated the A / D, D / A conversion and power amplifier circuit, the audio module only needs to be connected to the external audio signal input and output circuit. The audio module includes an audio signal input circuit and an audio signal output circuit.

[0104] The audio signal input circuit includes a microphone input unit U3, a twelfth capacitor C12, a thirteenth capacitor C13, a fourteenth capacitor C14, a fifteenth capacitor C15, a sixteenth capacitor C16, a seventeenth capacitor C17, a second resistor R2 and a third resistor R3.

[0105] The positive electrode of the microphone input unit U3 is respectively connected to the first end of the thirteenth capacitor C13, the first end of the fifteenth capacitor C15, the first end of the second resistor R2 and the first end of the fourteenth capacitor C14; the second end of the second resistor R2 is connected to the first end of the twelfth capacitor C12; the second end of the fourteenth capacitor C14 is connected to the first differential signal output terminal MIC_P; the negative electrode of the microphone input unit U3 is respectively connected to the second end of the fifteenth capacitor C15, the first end of the sixteenth capacitor C16, the first end of the third resistor R3 and the first end of the seventeenth capacitor C17; the second end of the seventeenth capacitor C17 is connected to the second differential signal output terminal MIC_N; the second end of the twelfth capacitor C12, the second end of the thirteenth capacitor C13, the second end of the sixteenth capacitor C16 and the second end of the third resistor R3 are all grounded.

[0106] The audio signal output circuit includes a speaker audio output unit U4, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, an eighteenth capacitor C18 and a nineteenth capacitor C19.

[0107] A first end of the speaker audio output unit U4 is connected to a first end of a fourth resistor R4; a second end of the fourth resistor R4 is respectively connected to a bias voltage control port HBIAS and a first end of an eighteenth capacitor C18; a second end of the speaker audio output unit U4 is connected to a right channel output port HP_R; a third end of the speaker audio output unit U4 is connected to a left channel output port HP_L; a fourth end of the speaker audio output unit U4 is respectively connected to a common port HP_COM, a first end of a nineteenth capacitor C19 and a first end of a sixth resistor R6; a second end of the sixth resistor R6 is connected to a common feedback port HP_COMFB; a second end of the nineteenth capacitor C19 is connected to a first end of a fifth resistor R5; a second end of the eighteenth capacitor C18 and a second end of the fifth resistor R5 are both grounded.

[0108] The audio signal input circuit designed in this embodiment includes multiple capacitors and resistors, which can effectively filter out high-frequency noise and interference in the audio signal, ensuring the purity and fidelity of the input signal. Similarly, the resistors and capacitors in the audio signal output circuit also help reduce distortion and noise in the output signal, ensuring high-fidelity transmission of the audio signal.

[0109] In one embodiment, see Figure 7 and Figure 8 , Figure 7 The structure and connection diagram of the network communication circuit is shown in Figure 1. Figure 8 The 4G wireless transmission module is connected to the USB differential data terminal of the main control processor; the 4G wireless transmission module includes a network communication circuit and a SIM card circuit.

[0110] Exemplarily, the 4G transmission module is used to transmit the processed video image data to the maintenance center server via the 4G wireless network, and can conduct voice calls.

[0111] The network communication circuit includes a third chip M2, a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a tenth resistor R10 and an electrostatic protection component ESD.

[0112] Among them, the third chip M2 can use Air720, which has rich built-in network protocols, integrates multiple industrial standard interfaces, and supports multiple drivers and software functions. The 4G module and the main control processor V3S communicate through the USB serial interface. The USB of Air720 complies with the USB2.0 specification and supports high-speed (480Mbps) and full-speed (12Mbps) modes. This interface can be used for AT command transmission, data transmission, software debugging and software upgrades. At the same time, the USB virtual serial port driver supports USB drivers under operating systems such as Windows XP, Windows7 / 10, Linux 2.6.x / 3.x / 4.1, Android 4.x / 5.x / 6.x / 7.x. Among them, USB-VBUS is the USB power supply, USB_DM and USB_DP are the positive and negative terminals of the USB differential data, respectively, and both require an external 90 ohm differential impedance.

[0113] The positive electrode of the USB differential data of the third chip M2 is respectively connected to the first end of the ninth resistor R9 and the first end of the seventh resistor R7; the second end of the ninth resistor R9 is respectively connected to the first test endpoint and the first end of the electrostatic protection component ESD array; the second end of the seventh resistor R7 is connected to the positive electrode of the USB differential data of the first chip; the negative electrode of the USB differential data of the third chip M2 is respectively connected to the first end of the tenth resistor R10 and the first end of the eighth resistor R8; the second end of the tenth resistor R10 is respectively connected to the second test endpoint and the second end of the electrostatic protection component ESD array; the second end of the eighth resistor R8 is connected to the negative electrode of the USB differential data of the first chip; and the third end of the electrostatic protection component ESD array is grounded.

[0114] The SIM card circuit includes a SIM chip JP1, a TSV diode array U5, an eleventh resistor R11, a twelfth resistor R12, a thirteenth resistor R13, a fourteenth resistor R14, a twentieth capacitor C20, a twenty-first capacitor C21, a twenty-second capacitor C22, and a twenty-third capacitor C23. The distance between the SIM chip JP1 and the third chip M2 is less than a preset value, ensuring that the distance between the card holder and the module is as close as possible in the circuit design, and the SIM card signal line is wired away from the RF line and the VBAT power line, so as to ensure good performance of the SIM card and prevent it from being damaged.

[0115] The power input terminal VCC of the SIM chip JP1 is respectively connected to the first end of the twentieth capacitor C20, the fifth end of the TSV diode array U5 and the working voltage port USIM_VDD; the reset signal input terminal RST of the SIM chip JP1 is respectively connected to the first end of the eleventh resistor R11 and the fourth end of the TSV diode array U5; the second end of the eleventh resistor R11 is connected to the reset control port USIM_RST; the clock signal input terminal CLK of the SIM chip JP1 is respectively connected to the first end of the twelfth resistor R12 and the third end of the TSV diode array U5; the second end of the twelfth resistor R12 is respectively connected to the clock control port USIM_CLK, the twentieth The first end of the capacitor C20 is connected to the first end of the twenty-first capacitor C21; the serial input and output data terminal IO is respectively connected to the sixth end of the TSV diode array U5, the first end of the twenty-third capacitor C23, the first end of the fourteenth resistor R14 and the first end of the thirteenth resistor R13; the second end of the thirteenth resistor R13 is connected to the data transmission control terminal USIM_DATA; the second end of the fourteenth resistor R14 is connected to the working voltage port USIM_VDD; the second end of the twentieth capacitor C20, the second end of the twenty-first capacitor C21, the second end of the twenty-second capacitor C22, the second end of the twenty-third capacitor C23 and the second end of the TSV diode array U5 are all grounded.

[0116] In one embodiment, see Fig. 9 , Fig. 9 The power module includes a power management chip; the power management chip has a built-in three-way synchronous power-off module U6 and a compensation circuit.

[0117] The compensation circuit includes a first compensation circuit, a second compensation circuit and a third compensation circuit. The first compensation circuit includes a third inductor, a twenty-fifth capacitor, a fifteenth resistor, a sixteenth resistor, a twenty-fourth capacitor and a thirtieth capacitor. The first end of the third inductor is connected to the first port SW1 of the three-way synchronous power supply power-off module U6; the second end of the third inductor is respectively connected to the first end of the twenty-fifth capacitor, the first end of the fifteenth resistor, the first end of the twenty-fourth capacitor and the 1.2V (1V2) output end; the second end of the twenty-fifth capacitor is respectively connected to the first port FB1 of the three-way synchronous power supply power-off module U6, the second end of the fifteenth resistor and the first end of the sixteenth resistor; the first end of the thirtieth capacitor is respectively connected to the first port VN1 of the three-way synchronous power supply power-off module U6 and the voltage input end VCC_5V; the second end of the thirtieth capacitor, the second end of the sixteenth resistor and the second end of the twenty-fourth capacitor are all grounded.

[0118] The second compensation circuit includes a fourth inductor, a twenty-seventh capacitor, a seventeenth resistor, an eighteenth resistor, a twenty-sixth capacitor and a thirty-second capacitor. The third compensation circuit includes a fifth inductor, a twenty-ninth capacitor, a nineteenth resistor, a twentieth resistor, a twenty-eighth capacitor and a thirty-third capacitor. The connection method of the second compensation circuit and the third compensation circuit is the same as that of the first compensation circuit, which will not be repeated here.

[0119] Exemplarily, the power management chip is powered by a 5V power supply and outputs 1.2V, 1.8V and 3.3V DC voltages to power other circuits of the wireless audio and video transmission module. Since the EA3036 power management chip has a built-in three-way synchronous power-off module, provides a light-load high-efficiency mode, and has a built-in compensation circuit, the circuit design is simplified, the peripheral circuit is simple, and the stability is high.

[0120] It can be seen that the 4G wireless audio and video acquisition and transmission device for remote maintenance of equipment proposed in the present invention is aimed at the audio and video acquisition and transmission needs of equipment maintenance site under field conditions. The 4G wireless audio and video transmission module used for remote maintenance of equipment is based on an embedded system, with a simple hardware circuit and high cost performance. It not only avoids the use and constraints of wired cables, but also gives full play to the advantages of wireless networks. Maintenance personnel can carry portable maintenance equipment for mobile monitoring, which ensures the flexibility of audio and video acquisition at the maintenance site and provides reliable remote technical support for on-site maintenance personnel.

[0121] The present application embodiment provides a 4G wireless audio and video acquisition and transmission method for remote maintenance of equipment, which is applied to the main control circuit module of the 4G wireless audio and video acquisition and transmission device for remote maintenance of equipment in the above embodiment. The 4G wireless audio and video acquisition and transmission method for remote maintenance of equipment includes:

[0122] The camera module is controlled to collect video image information of the maintenance site and the audio module is controlled to obtain audio signals of the maintenance site.

[0123] Compress and fuse video image information and audio signals.

[0124] The processed video image information and processed audio signal are transmitted to the maintenance center server via the 4G wireless network. Or

[0125] The video image information and audio signal uploaded by the maintenance center server are processed, and the processed video image information and audio signal uploaded by the maintenance center server are output.

[0126] The present application provides a remote equipment maintenance system, including a 4G wireless audio and video acquisition and transmission device for remote equipment maintenance as described in the above-mentioned embodiment.

[0127] The present application also provides a controller, see Fig.10The controller 700 may include: at least one processor 710 and a memory 720, wherein the memory 720 stores a computer program that can be run on the at least one processor 710, and when the processor 710 executes the computer program, the steps in any of the above method embodiments are implemented.

[0128] Exemplarily, the computer program may be divided into one or more modules / units, one or more modules / units are stored in the memory 720, and executed by the processor 710 to complete the present application. One or more modules / units may be a series of computer program segments capable of completing specific functions, and the program segments are used to describe the execution process of the computer program in the controller 700.

[0129] Those skilled in the art will understand that Fig.10 These are merely examples of controllers and do not constitute a limitation of the controller, which may include more or fewer components than those shown in the figure, or a combination of certain components, or different components, such as input and output devices, network access devices, buses, etc.

[0130] The processor 710 may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or the processor may be any conventional processor, etc.

[0131] The memory 720 may be an internal storage unit of the controller or an external storage device of the controller, such as a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card, etc. The memory 720 is used to store computer programs, methods, and other programs and data required by the system. The memory 720 may also be used to temporarily store data that has been output or is to be output.

[0132] The bus may be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus, etc. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of representation, the bus in the drawings of the present application is not limited to only one bus or one type of bus.

[0133] The 4G wireless audio and video acquisition and transmission method for remote maintenance of equipment provided in the embodiment of the present application can be applied to controllers such as computers, tablet computers, laptops, netbooks, personal digital assistants (PDAs), etc. The embodiment of the present application does not impose any restrictions on the specific type of controller.

[0134] It should be understood that the size of the serial numbers of the steps in the above embodiments does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0135] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A 4G wireless audio and video acquisition and transmission device for remote maintenance of equipment, characterized in that: include: Main control circuit module, camera module, audio module, 4G wireless transmission module and power module; The camera module is used to collect video image information of the maintenance site; The audio module is used to obtain audio signals and output audio signals; The camera module, the audio module and the 4G wireless transmission module are respectively connected to the main control circuit module; the main control circuit module is used to process the video image information and the audio signal, and perform coordinated control and resource allocation; The 4G wireless transmission module is used to transmit the processed video image information and the processed audio signal to the maintenance center server via the 4G wireless network; The camera module, the audio module, the main control circuit module and the 4G wireless transmission module are respectively connected to the power module; the power module is used to supply power to the main control circuit module, the camera module, the audio module and the 4G wireless transmission module.

2. The 4G wireless audio and video acquisition and transmission device for remote maintenance of equipment according to claim 1, characterized in that: The main control circuit module includes a main control processor, a data storage module, an LCD display circuit, an external communication circuit and a peripheral circuit; The main control processor includes a first chip; the first chip has a built-in DRAM memory; the data storage module, the LCD display circuit, the external communication circuit and the peripheral circuit are respectively connected to the first chip; The data storage module includes a NAND Flash chip, an SD card and an internal on-chip memory; the NAND Flash chip stores U-boot system startup code, Linux kernel code, file system code and application programs; the SD card is used to store the video image information and the audio signal; The internal on-chip memory is used for accessing program data when the system is running, and for receiving the video image information and the audio signal; The external communication circuit includes a first serial communication interface, a second serial communication interface, an I2C serial communication interface, an Ethernet interface and a WIFI interface; the first serial communication interface is used to communicate with the host computer; the second serial communication interface is connected to the 4G wireless communication module for data transmission with the 4G wireless communication module; the Ethernet interface is used for wired communication; the WIFI interface is used for wireless communication; The peripheral circuit includes a crystal oscillator circuit, a reset circuit, an external button and a display circuit; the crystal oscillator circuit is used to provide the required 24M and 32K external clocks for the main control processor; the reset circuit is used for system reset; the external button circuit and display circuit are used for mode switching, mode selection and function indication.

3. The 4G wireless audio and video acquisition and transmission device for remote maintenance of equipment according to claim 2, characterized in that: The camera module includes a second chip, a three-terminal voltage stabilizing filter circuit and a light emitting diode circuit; The three-terminal voltage stabilizing filter circuit comprises a first voltage stabilizing filter circuit, a second voltage stabilizing filter circuit and a third voltage stabilizing filter circuit; The serial data pin SDA of the second chip is connected to the serial data pin of the first chip; the serial clock pin SCL of the second chip is connected to the serial clock pin of the first chip; the 8-bit pixel data pins D0-D7 of the second chip are respectively connected to the GPIO port of the first chip; the frame synchronization signal pin of the second chip is connected to the frame synchronization signal receiving pin of the first chip; the frame synchronization signal pin of the second chip is used to output the frame synchronization signal VSYNC and the line synchronization signal HSYNC; the pixel output clock pin PCLK of the second chip is connected to the pixel output clock signal receiving pin of the first chip; The analog voltage pin of the second chip is connected to the third voltage control port of the third voltage stabilizing and filtering circuit; the working voltage pin of the second chip is respectively connected to the second voltage control port of the first voltage stabilizing and filtering circuit and the voltage control port of the second voltage stabilizing and filtering circuit; the digital voltage pin of the second chip is connected to the fourth voltage control port of the third voltage stabilizing and filtering circuit.

4. The 4G wireless audio and video acquisition and transmission device for remote maintenance of equipment as claimed in claim 3, characterized in that: The first voltage stabilizing filter circuit includes a first inductor, a second inductor, a first capacitor, a second capacitor, a third capacitor and a first voltage control chip; The first voltage control port of the first voltage stabilizing filter circuit is connected to the first end of the first inductor; the second end of the first inductor is respectively connected to the first end of the first capacitor and the input end of the first voltage control chip; the output end of the first voltage control chip is connected to the first end of the second inductor; the second end of the second inductor is respectively connected to the first end of the second capacitor, the first end of the third capacitor and the second voltage control port of the first voltage stabilizing filter circuit; the second end of the first capacitor, the ground end of the first voltage control chip, the second end of the second capacitor and the second end of the third capacitor are all grounded; The second voltage stabilizing filter circuit includes a fourth capacitor; the voltage control port of the second voltage stabilizing filter circuit is connected to the first end of the fourth capacitor; the second end of the fourth capacitor is grounded; The third voltage stabilizing filter circuit includes a fifth capacitor, a sixth capacitor, a seventh capacitor, an eighth capacitor, a ninth capacitor, a tenth capacitor, an eleventh capacitor, a third inductor, a fourth inductor and a second voltage control chip; The first voltage control port of the third voltage stabilizing and filtering circuit is respectively connected to the first end of the fifth capacitor and the input end of the second voltage control chip; the output end of the second voltage control chip is respectively connected to the first end of the sixth capacitor, the first end of the seventh capacitor, the second voltage control port of the third voltage stabilizing and filtering circuit, the first end of the third inductor and the first end of the fourth inductor; the second end of the third inductor is respectively connected to the first end of the eighth capacitor, the first end of the ninth capacitor and the third voltage control port of the third voltage stabilizing and filtering circuit; the second end of the fourth inductor is respectively connected to the first end of the tenth capacitor, the first end of the eleventh capacitor and the fourth voltage control port of the third voltage stabilizing and filtering circuit; the second end of the fifth capacitor, the ground end of the second voltage control chip, the second end of the sixth capacitor, the second end of the seventh capacitor, the second end of the eighth capacitor, the second end of the ninth capacitor, the second end of the tenth capacitor and the second end of the eleventh capacitor are all grounded.

5. The 4G wireless audio and video acquisition and transmission device for remote maintenance of equipment as claimed in claim 3, characterized in that: The first voltage port of the light emitting diode circuit is connected to the first voltage control port of the third voltage stabilizing filter circuit; the light emitting diode circuit is used to provide a light source for the camera module; The light emitting diode circuit comprises a first light emitting diode, a second light emitting diode, a first MOS tube and a first resistor; The first voltage port of the light-emitting diode circuit is respectively connected to the anode of the first light-emitting diode and the anode of the second light-emitting diode; the cathode of the first light-emitting diode is respectively connected to the cathode of the second light-emitting diode and the D pole of the first MOS tube; the G pole of the first MOS tube is respectively connected to the first end of the first resistor and the detection overvoltage protection port of the light-emitting diode circuit; the second end of the first resistor and the S pole of the first MOS tube are both grounded.

6. The 4G wireless audio and video acquisition and transmission device for remote maintenance of equipment according to claim 1, characterized in that: The audio module includes an audio signal input circuit and an audio signal output circuit; The audio signal input circuit includes a microphone input unit, a twelfth capacitor, a thirteenth capacitor, a fourteenth capacitor, a fifteenth capacitor, a sixteenth capacitor, a seventeenth capacitor, a second resistor and a third resistor; The positive electrode of the microphone input unit is respectively connected to the first end of the thirteenth capacitor, the first end of the fifteenth capacitor, the first end of the second resistor and the first end of the fourteenth capacitor; the second end of the second resistor is connected to the first end of the twelfth capacitor; the second end of the fourteenth capacitor is connected to the first differential signal output terminal; the negative electrode of the microphone input unit is respectively connected to the second end of the fifteenth capacitor, the first end of the sixteenth capacitor, the first end of the third resistor and the first end of the seventeenth capacitor; the second end of the seventeenth capacitor is connected to the second differential signal output terminal; the second end of the twelfth capacitor, the second end of the thirteenth capacitor, the second end of the sixteenth capacitor and the second end of the third resistor are all grounded; The audio signal output circuit includes a speaker audio output unit, a fourth resistor, a fifth resistor, a sixth resistor, an eighteenth capacitor and a nineteenth capacitor; The first end of the speaker audio output unit is connected to the first end of the fourth resistor; the second end of the fourth resistor is respectively connected to the bias voltage control port and the first end of the eighteenth capacitor; the second end of the speaker audio output unit is connected to the right channel output port; the third end of the speaker audio output unit is connected to the left channel output port; the fourth end of the speaker audio output unit is respectively connected to the common port, the first end of the nineteenth capacitor and the first end of the sixth resistor; the second end of the sixth resistor is connected to the common feedback port; the second end of the nineteenth capacitor is connected to the first end of the fifth resistor; the second end of the eighteenth capacitor and the second end of the fifth resistor are both grounded.

7. The 4G wireless audio and video acquisition and transmission device for remote maintenance of equipment as claimed in claim 2, characterized in that: The 4G wireless transmission module is connected to the USB differential data terminal of the main control processor; the 4G wireless transmission module includes a network communication circuit and a SIM card circuit; The network communication circuit includes a third chip, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor and an electrostatic protection component; The USB differential data positive electrode of the third chip is respectively connected to the first end of the ninth resistor and the first end of the seventh resistor; the second end of the ninth resistor is respectively connected to the first test endpoint and the first end of the electrostatic protection component array; the second end of the seventh resistor is connected to the USB differential data positive electrode of the first chip; the USB differential data negative electrode of the third chip is respectively connected to the first end of the tenth resistor and the first end of the eighth resistor; the second end of the tenth resistor is respectively connected to the second test endpoint and the second end of the electrostatic protection component array; the second end of the eighth resistor is connected to the USB differential data negative electrode of the first chip; the third end of the electrostatic protection component array is grounded; The SIM card circuit includes a SIM chip, a TSV diode array, an eleventh resistor, a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a twentieth capacitor, a twenty-first capacitor, a twenty-second capacitor and a twenty-third capacitor; the distance between the SIM chip and the third chip is less than a preset value; The power input terminal of the SIM chip is respectively connected to the first end of the 20th capacitor, the fifth end of the TSV diode array and the working voltage port; the reset signal input terminal of the SIM chip is respectively connected to the first end of the 11th resistor and the fourth end of the TSV diode array; the second end of the 11th resistor is connected to the reset control port; the clock signal input terminal of the SIM chip is respectively connected to the first end of the 12th resistor and the third end of the TSV diode array; the second end of the 12th resistor is respectively connected to the clock control port, the first end of the 20th capacitor and the first end of the 21st capacitor; The serial input and output data terminals are respectively connected to the sixth terminal of the TSV diode array, the first terminal of the twenty-third capacitor, the first terminal of the fourteenth resistor and the first terminal of the thirteenth resistor; the second terminal of the thirteenth resistor is connected to the data transmission control terminal; the second terminal of the fourteenth resistor is connected to the working voltage port; the second terminal of the twentieth capacitor, the second terminal of the twenty-first capacitor, the second terminal of the twenty-second capacitor, the second terminal of the twenty-third capacitor and the second terminal of the TSV diode array are all grounded.

8. The 4G wireless audio and video acquisition and transmission device for remote maintenance of equipment according to claim 1, characterized in that: The power supply module comprises a power supply management chip; the power supply management chip has a built-in three-way synchronous power supply power-off module and a compensation circuit.

9. A 4G wireless audio and video acquisition and transmission method for remote maintenance of equipment, characterized in that: The main control circuit module used in the 4G wireless audio and video acquisition and transmission device for remote maintenance of equipment as claimed in any one of claims 1 to 8 comprises: Control the camera module to collect video image information of the maintenance site and the audio module to obtain audio signals of the maintenance site; Compressing and fusing the video image information and the audio signal; Transmit the processed video image information and the processed audio signal to the maintenance center server via the 4G wireless network; or The video image information and audio signal uploaded by the maintenance center server are processed, and the processed video image information and audio signal uploaded by the maintenance center server are output.

10. A remote equipment maintenance system, characterized in that: It includes the equipment remote maintenance 4G wireless audio and video acquisition and transmission device as described in any one of claims 1 to 8.

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