Remote data and positioning information transmission system

Abstract

The utility model discloses a remote data and positioning information transmission system, which comprises a client server, a DTU communication module, a central control unit, a communication isolation unit, slave equipment and power supplies at all levels, the client server is electrically connected with the DTU communication module; the DTU communication module is electrically connected with the central control unit; the central control unit is electrically connected with the slave equipment through the communication isolation unit; each stage of power supply comprises a 3.88 V power supply circuit, a 3.3 V power supply circuit and a 5V power supply circuit, the corresponding end of the 3.88 V power supply circuit is electrically connected with the DTU communication module and the corresponding end of the 5V power supply circuit, the corresponding end of the 3.3 V power supply circuit is electrically connected with the central control unit and the corresponding end of the 5V power supply circuit, and the corresponding end of the 5V power supply circuit is electrically connected with the corresponding end of the slave equipment.

Description

Technical Field

[0001] This utility model relates to the field of information transmission technology, and in particular to a remote data and positioning information transmission system. Background Technology

[0002] Most existing related technologies adopt embedded development of DTU modules, using the main MCU to realize remote data uploading or downloading, and are applied in fields such as vehicle monitoring, remote control, telemetry, security and fire protection systems, wireless remote control systems, wireless 485 / 422 data communication, and digital image transmission.

[0003] Existing products suffer from problems such as needing to send commands and constantly reconnect, inaccurate or lost location information, inability to remotely change server addresses or data, high data charges, difficulty in module development, difficulty in ensuring the storage of important information, difficulty in guaranteeing after-sales service, and the need for commands in server pass-through mode.

[0004] 1. Similar products on the market fall into two categories:

[0005] 1) Embedded module solution:

[0006] ① Currently, most devices on the market use embedded modules for design, which use a main MCU to continuously access the data for data transmission. However, this requires constantly sending commands to reconnect, monitor, or process data, which affects the main function implementation and power consumption design of the main device.

[0007] ② Embedded modules have high requirements for antennas and are subject to interference from other signal lines or power supplies on the motherboard, requiring additional cost for shielding measures.

[0008] ③ During long-term high-load data transmission, the power consumption of the communication and GPS modules can reach 3-5W. If they share the heat dissipation channel with other chips (such as MCU and FPGA) on the main device function board, the local temperature rise may exceed the device specifications (such as commercial-grade chips, which usually require ≤85℃).

[0009] ④ The high-frequency radio frequency signals (such as GSM band 850MHz-1900MHz) of the communication and GPS modules may be coupled to the analog circuits (such as sensor interfaces) of the function board through the power supply or ground wire, resulting in a decrease in sampling accuracy.

[0010] ⑤ Embedded modules increase the size of the main functional board, affecting the subsequent shell design and reducing flexibility and space utilization.

[0011] 2) Secondary Development Solution

[0012] ① The secondary development approach requires developers to master the module's underlying hardware architecture (such as baseband processor and RF front-end), communication protocol stack (such as TCP / IP and MQTT), and the manufacturer's proprietary AT instruction set, which requires a high level of embedded development experience.

[0013] ② During development, manpower is required for driver adaptation, protocol parsing and peripheral control. Time and resources are also required for testing, debugging and optimization, especially when dealing with complex communication protocols or implementing specific functions, which may lead to complex problems and require technical support from module manufacturers.

[0014] ③ The OpenCPU solutions from different module manufacturers vary greatly (e.g., Quectel uses C language, while Youfang uses Python), resulting in high porting costs.

[0015] ④ As network standards are upgraded (such as the retirement of 2G networks), the protocol stack needs to be continuously updated; after the hardware reaches end of life, technical support may be lost.

[0016] 2. Modules are generally used as slave devices. During data transmission, the master device needs to continuously send commands to obtain uplink information, which increases the cost of the master device and the difficulty of development.

[0017] 3. When using secondary development or embedded modules, the integrated design results in a fixed number of interfaces (such as a limited number of USB / UART), making it difficult to adapt to future functional upgrades (such as adding sensors or peripherals). Moreover, when there is important information that needs to be stored, it will lead to a shortage of resources such as memory and pins in the development module, making it difficult to expand a large amount of memory for storage.

[0018] 4. The CPU performance of the secondary development module is relatively weak (e.g., using a low-cost MCU), making it difficult to meet the requirements of complex protocol parsing and high-frequency data acquisition. For example, in MQTT DTU, latency or packet loss may occur during high-concurrency data throughput.

[0019] 5. Currently, most existing technologies passively upload data and do not transmit GPS location information, which leads to the need for more resources to process the data during slave device development, increasing the development difficulty. Utility Model Content

[0020] In view of the problems existing in the prior art, this utility model provides a remote data and positioning information transmission system.

[0021] To achieve the above objectives, the technical solution of this utility model is as follows:

[0022] This utility model provides a remote data and location information transmission system, including: a client server, a DTU communication module, a central control unit, a communication isolation unit, slave devices, and power supplies at various levels;

[0023] The client server is electrically connected to the DTU communication module;

[0024] The DTU communication module is electrically connected to the central control unit;

[0025] The central control unit is electrically connected to the slave device through a communication isolation unit;

[0026] The power supply at each level includes a 3.88V power supply circuit, a 3.3V power supply circuit, and a 5V power supply circuit. The corresponding terminals of the 3.88V power supply circuit are electrically connected to the DTU communication module and the corresponding terminals of the 5V power supply circuit, respectively. The corresponding terminals of the 3.3V power supply circuit are electrically connected to the central control unit and the corresponding terminals of the 5V power supply circuit, respectively. The corresponding terminals of the 5V power supply circuit are electrically connected to the corresponding terminals of the slave devices.

[0027] Preferably, the client server and the DTU communication module are connected via TCP; the DTU communication module is connected to the central control unit via the MQTT protocol.

[0028] Preferably, the DTU communication module includes a DTU communication circuit, a SIM card circuit, a DTU-MCU communication circuit, and a reset and indicator light circuit; the corresponding terminals of the DTU communication circuit are electrically connected to the corresponding terminals of the SIM card circuit, the DTU-MCU communication circuit, and the reset and indicator light circuit, respectively.

[0029] Preferably, the central control unit includes an MCU main control circuit and a storage circuit; the corresponding terminals of the MCU main control circuit are electrically connected to the corresponding terminals of the storage circuit and the DTU-MCU communication circuit, respectively.

[0030] Preferably, the 5V power supply circuit includes a DC-DC step-down chip and its peripheral circuits, an isolation power chip and its peripheral circuits, and an isolation transformer; the DC-DC step-down chip is electrically connected to the corresponding terminal of the isolation transformer via the isolation power chip.

[0031] Preferably, the 3.88V power supply circuit includes a voltage regulator chip and its peripheral circuits. The corresponding terminal of the voltage regulator chip is electrically connected to the corresponding terminal of the 5V power supply circuit, and is used to regulate the input 5V power supply to 3.8V to supply power to the circuit.

[0032] Preferably, the 3.3V power supply circuit includes a second voltage regulator chip and its peripheral circuits. The corresponding terminal of the second voltage regulator chip is electrically connected to the corresponding terminal of the 5V power supply circuit, and is used to regulate the output 5V power supply to 3.3V to supply power to the circuit.

[0033] Preferably, the communication isolation unit includes a communication isolation circuit, which includes a 485 communication isolation chip and its peripheral circuits, and a 485 transceiver circuit; the corresponding terminal of the 485 communication isolation chip is electrically connected to the corresponding terminal of the 485 transceiver circuit.

[0034] The technical solution of this utility model has the following beneficial effects:

[0035] This technical solution reduces the difficulty of subsequent development by combining a DTU communication module with a microcontroller, and it offers abundant resources, allowing for the addition of other modules and functions. It integrates 4G cloud transmission and GPS positioning, enabling remote monitoring and real-time viewing of device status from the client. For slave devices, it reduces development difficulty, minimizing the need for frequent command connections to the network, thus reducing resource consumption and task execution bottlenecks.

[0036] 2. Abundant external device resources allow for the selection of different control units to achieve various functions such as data transmission and GPS positioning, including local data storage. Multiple storage chips can be added, theoretically enabling data storage at the megabyte level.

[0037] 3. Low development difficulty: Users can complete the communication of the communication module using AT commands. Subsequent development only requires calling the relevant APIs, which facilitates the development of additional functions for the module.

[0038] 4. Currently used in cloud-based battery management systems for aerial work platforms, electric forklifts, express delivery vehicles, and sanitation sweepers. The system is reliable, with a robust fault and safety early warning mechanism, 24-hour manual data monitoring, and a lifetime free server and backend big data platform. User feedback indicates that its safety and applicability are superior to the products it replaces. Attached Figure Description

[0039] Figure 1 This is a control block diagram of the present invention;

[0040] Figure 2 This is the circuit schematic diagram of the DTU module of this utility model;

[0041] Figure 3 This is a circuit diagram of the central control unit of this utility model;

[0042] Figure 4 The circuit diagrams for each stage of the power supply of this utility model are shown below.

[0043] Figure 5 This is a circuit diagram of the communication isolation unit of this utility model. Detailed Implementation

[0044] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0045] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0046] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0047] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0048] In this utility model, unless otherwise expressly specified and limited, the first feature is "on" or "on" the second feature.

[0049] The term "below" can include situations where the first and second features are in direct contact, or situations where the first and second features are in contact through another feature between them. Furthermore, "above," "over," and "on top" of the first feature above the second feature includes situations where the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" of the first feature below the second feature includes situations where the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0050] Reference Figures 1 to 5 This utility model provides a remote data and location information transmission system, including: a client server 100, a DTU communication module 200, a central control unit 300, a communication isolation unit 400, a slave device 500, and power supplies at various levels;

[0051] The client server 100 is electrically connected to the DTU communication module 200;

[0052] The DTU communication module 200 is electrically connected to the central control unit 300;

[0053] The central control unit 300 is electrically connected to the slave device 500 through the communication isolation unit 400;

[0054] The power supply at each level includes a 3.88V power supply circuit 600, a 3.3V power supply circuit 700 and a 5V power supply circuit 800, wherein the corresponding terminals of the 3.88V power supply circuit 600 are electrically connected to the corresponding terminals of the DTU communication module 200 and the 5V power supply circuit 800, respectively.

[0055] The corresponding terminals of the 3.3V power supply circuit 700 are electrically connected to the corresponding terminals of the central control unit 300 and the 5V power supply circuit 800, respectively. The corresponding terminal of the 5V power supply circuit 800 is electrically connected to the corresponding terminal of the slave device 500.

[0056] Furthermore, the client server 100 is connected to the DTU communication module 200 via TCP; the DTU communication module 200 is connected to the central control unit 300 via the MQTT protocol.

[0057] Furthermore, the DTU communication module 200 includes a DTU communication circuit 201, a SIM card circuit 202, a DTU-MCU communication circuit 203, and a reset and indicator light circuit 204. The corresponding terminals of the DTU communication circuit 201 are electrically connected to the corresponding terminals of the SIM card circuit 202, the DTU-MCU communication circuit 203, and the reset and indicator light circuit 204, respectively. The DTU communication circuit 201 includes a DTU communication chip and its peripheral circuits. The DTU communication chip is model ML307A-GCLN. This DTU module has the advantages of low cost, integration of MQTT, TCP, GPS, LBS, and other functions, and the use of the AT command set, reducing development difficulty and time.

[0058] The SIM card chip in the SIM card circuit 202 is easy to operate; simply push it in or out to easily insert or remove the SIM card. Furthermore, the chip features a CD detection function, ensuring accurate card status identification each time it is inserted, avoiding unnecessary trouble.

[0059] The DTU-MCU communication circuit 203: VDD_EXT is provided by U10. When U10 is underpowered, Q3 and Q4 are not turned on to prevent external signals from interfering with the internal chip when U10 is in an unknown state. When U10 is powered normally, VDD_EXT outputs 1.8V. When U12 has data to send, the TXD_MCU pin of U12 outputs a low level, the base-emitter voltage Vbe of Q3 is greater than 0.7V, Q3 turns on, causing the U10 pin USART0_RXD to be pulled low, realizing data transmission. The parallel circuit to the right of Q3 acts as a pull-up resistor for the U10 pin. When U10 has data to send, the USART0_TXD pin of U10 outputs a low level, the base-emitter voltage Vbe of Q4 is greater than 0.7V, Q4 turns on, causing the U12 RXD_MCU pin to be pulled low, realizing data transmission. The parallel circuit to the left of Q4 acts as a pull-up resistor for the U10 pin.

[0060] Reset and indicator light circuit 204: When U12 and U10 are powered normally, Q5 is turned on, and LED D11 will light up, indicating that the device is working normally. SW1 is the reset button, and SW2 is the upgrade switch. When the switch is set to high level, it is in normal working mode; when it is set to low level, it will enter the programming mode.

[0061] Furthermore, the central control unit 300 includes an MCU main control circuit 301 and a storage circuit 302; the corresponding terminals of the MCU main control circuit 301 are electrically connected to the storage circuit 302 and the corresponding terminals of the DTU-MCU communication circuit 203, respectively.

[0062] The MCU main control circuit 301 includes the MCU and its peripheral circuits. The MCU (U12) is model N32L406CBL7. U12 is a central controller microcontroller system. The control program uses bare-metal programming. If an operating system such as RTOS is used, the current consumption of the system will increase during task scheduling. D12 is a network indicator light, which will stay on when the network connection is successful. The main control MCU connects to the DTU communication module 200 via a serial port and connects to the client server 100 using AT command set. Once the connection is established, the client server will send query information or data to the DTU communication module 200. The MCU will actively receive information from the client server 100, perform data cleaning, verification, and filtering operations, and then transmit the data transparently via 485 communication. The slave device 500 sends data to the MCU. After verifying the data, the MCU sends the data to the client server 100 for processing via AT commands and finally displays it on the client interface. Currently, market communication modules use slave-device transmission. This design uses a host (client server 100) to request data from slave device 500. If slave device 500 replies, the data is transparently transmitted to the host computer; if no reply is received, the server is notified that the slave device has failed. The DTU communication module 200 in this design also features GPS 3D positioning, capable of periodically sending or receiving GPS location data. The advantage of GPS positioning is its speed measurement accuracy better than 0.1 m / s and timing accuracy better than 120 nanoseconds (an error of 1 second in 3 million years), enabling precise location information and facilitating remote management and monitoring of device status. The storage circuit 302 incorporates an SPI communication memory. If sufficient pin resources are available, additional pins can be added to expand storage space, addressing the issue of insufficient resources when storing large amounts of data on the device or locally.

[0063] Furthermore, the 5V power supply circuit includes a DC-DC step-down chip BMO451E and its peripheral circuitry, an isolation power supply chip VPS8504B and its peripheral circuitry, and an isolation transformer; the DC-DC step-down chip BMO451E is electrically connected to the corresponding terminal of the isolation transformer via the isolation power supply chip VPS8504B.

[0064] The system's 12V power input is stepped down to 5V by a DC-DC buck chip BMO451E, then converted to isolated power by an isolation power chip VPS8504B, and finally powered by an isolation transformer. The 3.88V power supply circuit includes an AMS1117 voltage regulator chip and its peripheral circuitry. The corresponding terminal of the AMS1117 voltage regulator chip is electrically connected to the corresponding terminal of the 5V power supply circuit, used to regulate the input 5V power to 3.8V to power the circuit. The 3.3V power supply circuit includes a second voltage regulator chip and its peripheral circuitry. The corresponding terminal of the second voltage regulator chip is electrically connected to the corresponding terminal of the 5V power supply circuit, used to regulate the output 5V power to 3.3V to power the circuit.

[0065] Furthermore, the communication isolation unit 400 includes a communication isolation circuit, which includes a 485 communication isolation chip IS3722 and its peripheral circuits, and a 485 transceiver circuit. The corresponding terminals of the 485 communication isolation chip and the corresponding terminals of the 485 transceiver circuit are electrically connected. In this embodiment, U6 is the 485 communication isolation chip IS3722 and U8 is the 485 transceiver, which can convert logic level signals into differential signals to achieve communication isolation and participate in the bus arbitration process to ensure that data collisions are avoided when multiple devices share the bus. In addition, it can reduce unnecessary frame listening through a specific frame wake-up mechanism, further reduce power consumption, and extend the device's battery life.

[0066] The technical solution of this utility model has the following beneficial effects:

[0067] This technical solution reduces the difficulty of subsequent development by combining a DTU communication module with a microcontroller, and it offers abundant resources, allowing for the addition of other modules and functions. It integrates 4G cloud transmission and GPS positioning, enabling remote monitoring and real-time viewing of device status from the client. For slave devices, it reduces development difficulty, minimizing the need for frequent command connections to the network, thus reducing resource consumption and task execution bottlenecks.

[0068] 2. Abundant external device resources allow for the selection of different control units to achieve various functions such as data transmission and GPS positioning, including local data storage. Multiple storage chips can be added, theoretically enabling data storage at the megabyte level.

[0069] 3. Low development difficulty: Users can complete the communication of the communication module using AT commands. Subsequent development only requires calling the relevant APIs, which facilitates the development of additional functions for the module.

[0070] 4. Currently used in cloud-based battery management systems for aerial work platforms, electric forklifts, express delivery vehicles, and sanitation sweepers. The system is reliable, with a robust fault and safety early warning mechanism, 24-hour manual data monitoring, and a lifetime free server and backend big data platform. User feedback indicates that its safety and applicability are superior to the products it replaces.

[0071] The DTU communication module is controlled by an external MCU. In theory, replacing the MCU can increase the memory storage chip without affecting the function, thus helping to store information locally.

[0072] External modules allow microcontrollers to connect via serial ports or other means, facilitating module replacement or upgrades as needed without replacing the entire system. This modular design enhances system flexibility and scalability. Furthermore, the microcontroller can adapt to various application scenarios, such as remote monitoring and IoT applications, improving the device's versatility and applicability.

[0073] The combination of cloud data transmission and GPS positioning allows data to be uploaded to the server via an internal protocol. Simultaneously, the server can also directly send data via the protocol, and the MCU performs data filtering, cleaning, and verification operations. This helps users better manage and process device information and reduces resource consumption for slave devices during development and storage operations.

[0074] When a device needs to integrate other functions but the slave device resources are insufficient, the system can directly perform system integration, reducing the burden on the slave device, and enabling intelligent management of the device from multiple aspects such as multiple modules, multiple systems, and multiple levels.

[0075] DTU modules typically encapsulate complex communication protocols and dialing functions, eliminating the need for developers to implement these functions from the ground up. This simplifies the development process, shortens the development cycle, facilitates integration and debugging with microcontrollers, and reduces the difficulty and time required for development.

[0076] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A remote data and positioning information transmission system, characterized in that, include: Client server, DTU communication module, central control unit, communication isolation unit, slave devices, and power supplies at all levels; The client server is electrically connected to the DTU communication module; The DTU communication module is electrically connected to the central control unit; The central control unit is electrically connected to the slave device through a communication isolation unit; The power supply at each level includes a 3.88V power supply circuit, a 3.3V power supply circuit, and a 5V power supply circuit. The corresponding terminals of the 3.88V power supply circuit are electrically connected to the DTU communication module and the corresponding terminals of the 5V power supply circuit, respectively. The corresponding terminals of the 3.3V power supply circuit are electrically connected to the central control unit and the corresponding terminals of the 5V power supply circuit, respectively. The corresponding terminals of the 5V power supply circuit are electrically connected to the corresponding terminals of the slave devices.

2. The remote data and positioning information transmission system according to claim 1, characterized in that, The client server and the DTU communication module are connected via TCP; the DTU communication module is connected to the central control unit via the MQTT protocol.

3. The remote data and positioning information transmission system according to claim 2, characterized in that, The DTU communication module includes a DTU communication circuit, a SIM card circuit, a DTU-MCU communication circuit, and a reset and indicator light circuit; the corresponding terminals of the DTU communication circuit are electrically connected to the corresponding terminals of the SIM card circuit, the DTU-MCU communication circuit, and the reset and indicator light circuit, respectively.

4. The remote data and positioning information transmission system according to claim 1, characterized in that, The central control unit includes an MCU main control circuit and a storage circuit; the corresponding terminals of the MCU main control circuit are electrically connected to the storage circuit and the corresponding terminals of the DTU-MCU communication circuit, respectively.

5. The remote data and positioning information transmission system according to claim 1, characterized in that, The 5V power supply circuit includes a DC-DC step-down chip and its peripheral circuits, an isolation power chip and its peripheral circuits, and an isolation transformer; the DC-DC step-down chip is electrically connected to the corresponding terminals of the isolation transformer via the isolation power chip.

6. The remote data and positioning information transmission system according to claim 5, characterized in that, The 3.88V power supply circuit includes a voltage regulator chip and its peripheral circuits. The corresponding terminal of the voltage regulator chip is electrically connected to the corresponding terminal of the 5V power supply circuit, and is used to regulate the input 5V power supply to 3.8V to supply power to the circuit.

7. The remote data and positioning information transmission system according to claim 6, characterized in that, The 3.3V power supply circuit includes a second voltage regulator chip and its peripheral circuit. The corresponding terminal of the second voltage regulator chip is electrically connected to the corresponding terminal of the 5V power supply circuit, and is used to regulate the output 5V power supply to 3.3V to supply power to the circuit.

8. The remote data and positioning information transmission system according to claim 1, characterized in that, The communication isolation unit includes a communication isolation circuit, which includes a 485 communication isolation chip and its peripheral circuits, and a 485 transceiver circuit; the corresponding terminal of the 485 communication isolation chip is electrically connected to the corresponding terminal of the 485 transceiver circuit.

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