An on-vehicle internet device

Abstract

This utility model discloses an in-vehicle internet access device. It employs a UIS8310 processor as the main control module, an SR3595D chip as the radio frequency module connected to the main control via an SPI interface, MP9486A and SC2720A chips to form a power management module communicating with the main control via an I2C interface, a Wi-Fi module connected to the main control via a USB 2.0 interface, DDR2 memory and NAND flash memory connected to the main control via a DDR2 bus and an SPI interface respectively, a high-gain antenna connected to the radio frequency module via an SMA interface, and a BMS communication interface connected to the main control via a serial interface. The UIS8310 main control and SR3595D radio frequency module work together to support high-speed TD-LTE data transmission, and the Wi-Fi module meets the needs of multi-device connectivity. The high-gain antenna can be flexibly adjusted to improve signal strength. The power management module ensures stable power supply through the MP9486A's wide voltage input and the SC2720A's protection mechanism. The BMS communication interface provides the hardware foundation for battery monitoring. The standardized interface achieves a compact connection, significantly improving the device's shock resistance, dust resistance, and temperature adaptability.

Description

Technical Field

[0001] This utility model relates to the field of electrical technology, and in particular to a vehicle-mounted internet access device. Background Technology

[0002] With the increasing demand for intelligence and connectivity in commercial vehicles, in-vehicle wireless internet terminals need to provide stable and high-speed network services under complex operating conditions. Commercial vehicles mostly use personal portable MIFI devices, which have limited main control processing capabilities, and their radio frequency modules are mostly based on 2G / 3G standards, resulting in low transmission rates and weak signal coverage. The antennas are mostly fixed low-gain designs, which cannot flexibly adjust the signal direction according to the vehicle's location, leading to frequent disconnections while driving and making it difficult to meet the actual needs of commercial vehicles for connecting multiple devices. Summary of the Invention

[0003] In view of this, the purpose of this utility model is to propose an in-vehicle Internet access device.

[0004] To achieve the above-mentioned technical objectives, the technical solution adopted by this utility model is as follows: An in-vehicle internet access device includes a main control module, a radio frequency (RF) module, a power management module, a Wi-Fi module, a storage module, an antenna module, and a BMS communication interface. The main control module is configured with a UIS8310 processor. The RF module is configured with an SR3595D chip, which is connected to the main control module via an SPI interface. The power management module includes an MP9486A step-down chip and an SC2720A power management chip. The MP9486A step-down chip is connected to an external power supply, and the SC2720A power management chip is connected to the main control module via an I2C interface. The Wi-Fi module is connected to the main control module via a USB 2.0 interface. The storage module includes DDR2 memory and NAND flash memory. The DDR2 memory is connected to the main control module via a DDR2 bus, and the NAND flash memory is connected to the main control module via an SPI interface. The antenna module includes a high-gain antenna, which is connected to the RF module via an SMA interface. The BMS communication interface is connected to the main control module via a serial communication interface.

[0005] In some embodiments, the antenna module further includes a magnetic mounting base, which is mechanically connected to the high-gain antenna for attaching the high-gain antenna to the top surface of the vehicle.

[0006] In some embodiments, a protective housing is also included. The protective housing contains a main control module, an RF module, a power management module, a Wi-Fi module, a storage module, and a BMS communication interface. The protective housing is made of ABS+PC composite material and is filled with shock-absorbing foam.

[0007] In some embodiments, the SC2720A power management chip has an overvoltage protection circuit, an overcurrent protection circuit, and an undervoltage protection circuit.

[0008] In some embodiments, the GPIO1 pin of the UIS8310 processor is connected to the enable pin of the Wi-Fi module, the GPIO2 pin is connected to the reset pin of the RF module, and the GPIO3 pin is connected to the enable control circuit of the BMS communication interface.

[0009] In some embodiments, the CE, WE, and RE pins of the NAND flash memory are connected to the chip select signal, write enable signal, and read enable signal of the main control module, respectively, and the IO0-IO3 data pins are connected to the SPI interface of the main control module.

[0010] In some embodiments, the 485 interface of the BMS communication interface includes A and B differential signal pins and a GND pin.

[0011] In some embodiments, the A0-A12 address pins and D0-D15 data pins of the DDR2 memory of the storage module are connected to the corresponding pins of the main control module, and impedance matching is performed through terminating resistors.

[0012] In some embodiments, the VIN pin of the MP9486A step-down chip is connected to the external power input, the EN pin is connected to the enable control circuit, the SW pin is connected to the power inductor, and the FB pin is connected to the feedback resistor network.

[0013] In some embodiments, a Type-C power supply interface is also included, which is circuit isolated from the vehicle power supply interface through diodes D5 and D8.

[0014] By adopting the above technical solution, the beneficial effects of this utility model compared with the prior art are as follows: Unlike existing technologies, the above technical solution employs a UIS8310 processor as the main control module, an SR3595D chip as the RF module connected to the main control via an SPI interface, MP9486A and SC2720A chips to form a power management module communicating with the main control via an I2C interface, a Wi-Fi module connected to the main control via a USB 2.0 interface, DDR2 memory and NAND flash memory connected to the main control via a DDR2 bus and an SPI interface respectively, a high-gain antenna connected to the RF module via an SMA interface, and a BMS communication interface connected to the main control via a serial interface. The UIS8310 main control and SR3595D RF module work together to support high-speed TD-LTE data transmission, and the Wi-Fi module meets the needs of multi-device connectivity. The high-gain antenna can be flexibly adjusted to improve signal strength. The power management module ensures stable power supply through the MP9486A's wide voltage input and the SC2720A's protection mechanism. The BMS communication interface provides the hardware foundation for battery monitoring. The standardized interface achieves a compact connection, significantly improving the device's shock resistance, dust resistance, and temperature adaptability. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a first schematic diagram of the in-vehicle internet access device described in the specific implementation; Figure 2 This is a second schematic diagram of the in-vehicle internet access device described in the specific implementation. Detailed Implementation

[0017] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be particularly noted that the following embodiments are only for illustrating the present invention and do not limit the scope of the present invention. Similarly, the following embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present invention.

[0018] Please see Figure 1This embodiment provides an in-vehicle internet access device, including a main control module, a radio frequency (RF) module, a power management module, a Wi-Fi module, a storage module, an antenna module, and a BMS communication interface. The main control module is configured with a UIS8310 processor; the RF module is configured with an SR3595D chip, which is connected to the main control module via an SPI interface; the power management module includes an MP9486A step-down chip and an SC2720A power management chip, with the MP9486A step-down chip connected to an external power supply and the SC2720A power management chip connected to the main control module via an I2C interface; the Wi-Fi module is connected to the main control module via a USB 2.0 interface; the storage module includes DDR2 memory and NAND flash memory, with the DDR2 memory connected to the main control module via a DDR2 bus and the NAND flash memory connected to the main control module via an SPI interface; the antenna module includes a high-gain antenna, which is connected to the RF module via an SMA interface; and the BMS communication interface is connected to the main control module via a serial communication interface.

[0019] In this embodiment, the main control module uses a UIS8310 processor as the core control unit, and implements system scheduling and protocol processing through its 1.0GHz ARM Cortex-A7 architecture; the radio frequency module is equipped with an SR3595D chip, which establishes a data path with the main control module through the SPI interface to complete the modulation and demodulation of TD-LTE signals; the power management module includes an MP9486A step-down chip and an SC2720A power management chip, where the MP9486A realizes step-down conversion with a wide voltage input, and the SC2720A communicates with the main control module through the I2C interface to complete the monitoring and protection of power status; the Wi-Fi module is connected to the main control module through a USB 2.0 interface to realize the conversion of TD-LTE data stream to 802.11ax Wi-Fi signal; the storage module consists of DDR2 memory and NAND flash memory, which provide system operation cache and firmware storage functions through the DDR2 bus and SPI interface, respectively; the antenna module uses a high-gain antenna, and realizes impedance-matched signal transmission with the radio frequency module through the SMA interface; the BMS communication interface is connected to the main control module through a serial interface to establish a data acquisition channel with the vehicle battery management system.

[0020] This embodiment achieves an organic combination of high-speed TD-LTE communication and multi-device Wi-Fi access. The UIS8310 main controller and SR3595D RF module ensure data transmission rate, the power management system composed of MP9486A and SC2720A ensures stable operation of the equipment in the environment of fluctuating commercial vehicle batteries, the rotatable high-gain antenna enhances signal coverage, the BMS communication interface expands battery monitoring function, and the overall structure improves system reliability and environmental adaptability through standardized interface design.

[0021] In some embodiments, the antenna module further includes a magnetic mounting base, which is mechanically connected to the high-gain antenna for attaching the high-gain antenna to the top surface of the vehicle.

[0022] In this embodiment, a magnetic mounting base is added to the original high-gain antenna. The magnetic mounting base forms a stable overall structure with the high-gain antenna through a mechanical connection. A permanent magnet array is embedded at the bottom of the base. The antenna module can be quickly installed on the metal surface of the vehicle roof using the principle of magnetic adsorption. This enables the antenna to be quickly installed, removed, and repositioned. It also maintains the antenna's stable posture during vehicle operation, effectively avoiding signal fluctuations caused by vibration.

[0023] This embodiment significantly improves the ease of installation and stability of the antenna module through the innovative design of the magnetic fixing base. The permanent magnet array ensures the antenna is firmly fixed on the vehicle roof, and the mechanical connection structure ensures the integrity of the antenna and the base. This meets the requirements of commercial vehicles for easy equipment installation and ensures the working stability of the antenna during vehicle operation, thereby effectively improving the signal reception quality and communication reliability of the entire wireless Internet terminal.

[0024] In some embodiments, a protective housing is also included. The protective housing contains a main control module, an RF module, a power management module, a Wi-Fi module, a storage module, and a BMS communication interface. The protective housing is made of ABS+PC composite material and is filled with shock-absorbing foam.

[0025] In this embodiment, the protective shell serves as the load-bearing structure for each functional module. It is injection molded from ABS+PC composite material. The ABS+PC composite material combines the mechanical strength of ABS with the impact resistance of PC. The shell is securely connected to the circuit boards of each module through a precisely designed snap-fit ​​structure. The shock-absorbing foam inside is made of closed-cell foamed polyethylene material, which is pre-compressed and filled in the gap between the circuit board and the inner wall of the shell to form a three-dimensional buffer structure.

[0026] This embodiment achieves multiple protective effects through the synergistic design of the composite material of the protective shell and the shock-absorbing structure. The ABS+PC composite material shell provides IP65-level dustproof and waterproof protection, while the internal shock-absorbing foam effectively attenuates the mechanical vibration generated during vehicle operation through energy absorption and dispersion mechanisms. This enables the terminal to adapt to the complex working environment of commercial vehicles and significantly improves the long-term working reliability of the equipment under harsh conditions such as vibration and high and low temperatures.

[0027] In some embodiments, the SC2720A power management chip has an overvoltage protection circuit, an overcurrent protection circuit, and an undervoltage protection circuit.

[0028] In this embodiment, the SC2720A power management chip integrates a triple protection circuit. The overvoltage protection circuit monitors the input voltage in real time through a voltage sampling network and immediately cuts off the power supply when the voltage exceeds a preset threshold. The overcurrent protection circuit uses a current sensing amplifier to detect the load current and automatically limits the output current when an overload occurs. The undervoltage protection circuit monitors the power supply voltage through a reference voltage comparator and performs a system shutdown operation when the voltage is lower than the operating threshold.

[0029] This embodiment constructs a complete power safety system through the multiple protection mechanisms of the SC2720A power management chip. Overvoltage protection prevents damage to sensitive devices from high voltage surges, overcurrent protection avoids thermal failure caused by line overload, and undervoltage protection ensures the safe shutdown of the system under abnormally low voltage conditions. The comprehensive power protection design significantly improves the reliability and service life of the terminal in the complex power supply environment of commercial vehicles.

[0030] In some embodiments, the GPIO1 pin of the UIS8310 processor is connected to the enable pin of the Wi-Fi module, the GPIO2 pin is connected to the reset pin of the RF module, and the GPIO3 pin is connected to the enable control circuit of the BMS communication interface.

[0031] In this embodiment, the GPIO1 pin of the UIS8310 processor is connected to the enable pin of the Wi-Fi module through a pull-up resistor, and controls the start-up and sleep states of the Wi-Fi module by outputting high and low level signals; the GPIO2 pin is connected to the reset pin of the RF module through a buffer, and can output a reset pulse signal to realize the soft reset operation of the RF module; the GPIO3 pin is connected to the enable control circuit of the BMS communication interface through a level conversion circuit, and realizes the power management of the BMS communication interface through programmable timing control.

[0032] This embodiment achieves precise control of each functional module by reasonably configuring the GPIO pin resources of the UIS8310 processor. The control of the GPIO1 pin ensures the power consumption management of the Wi-Fi module, the reset function of the GPIO2 pin improves the reliability of the RF module, and the enable control of the GPIO3 pin optimizes the working timing of the BMS communication interface.

[0033] In some embodiments, the CE, WE, and RE pins of the NAND flash memory are connected to the chip select signal, write enable signal, and read enable signal of the main control module, respectively, and the IO0-IO3 data pins are connected to the SPI interface of the main control module.

[0034] In this embodiment, the CE pin of the NAND flash memory is connected to the chip select signal line of the main control module through a series resistor to realize the selection control of the memory chip; the WE pin and RE pin are directly connected to the write enable signal line and read enable signal line of the main control module, respectively, and the timing of read and write operations is controlled by level triggering; the four data pins IO0-IO3 are connected in parallel to the corresponding pins of the SPI interface of the main control module to form a 4-bit wide data communication channel.

[0035] This embodiment optimizes the interface connection between NAND flash memory and the main control module, achieving efficient and reliable data storage management. Independent control signal lines ensure precise timing of read and write operations, and the 4-bit parallel SPI interface provides high data transmission bandwidth, ensuring the stability of the storage system. It fully leverages the performance advantages of NAND flash memory and effectively improves the data processing capabilities of the terminal.

[0036] In some embodiments, the 485 interface of the BMS communication interface includes A and B differential signal pins and a GND pin.

[0037] In this embodiment, the 485 interface of the BMS communication interface adopts a standard differential signal transmission structure. The A pin is connected to the TX+ signal line of the main control module as a non-inverting input terminal, the B pin is connected to the TX- signal line as an inverting input terminal, and the GND pin is connected to the system ground plane through a low impedance path. An isolation transformer and a common-mode choke are also provided between the differential signal pins and the main control module to form a complete electromagnetic interference protection circuit.

[0038] This embodiment establishes a reliable BMS data communication link through the differential signal transmission mechanism of the 485 interface. The anti-common-mode interference capability provided by the A and B differential pins ensures the stability of signal transmission. The optimized layout of the GND pin effectively reduces ground loop interference. Together with electromagnetic protection components, a complete noise suppression scheme is formed, enabling the terminal to achieve stable data interaction with the battery management system in the complex electromagnetic environment of commercial vehicles.

[0039] In some embodiments, the A0-A12 address pins and D0-D15 data pins of the DDR2 memory of the storage module are connected to the corresponding pins of the main control module, and impedance matching is performed through terminating resistors.

[0040] In this embodiment, the DDR2 memory of the storage module is interconnected with the main control module using a parallel bus architecture. The A0-A12 address pins are connected to the address bus of the main control module through equal-length wiring, and the D0-D15 data pins are connected to the data bus of the main control module through a point-to-point topology. All signal lines are configured with precise terminating resistors in parallel near the terminal, which are installed in the form of a resistor array at the position closest to the interface and are matched with the characteristic impedance of the transmission line.

[0041] This embodiment achieves stable transmission of high-speed data storage by optimizing the circuit design of the DDR2 memory interface. Equal-length wiring of the address bus and data bus ensures the consistency of signal timing. Precise matching of terminating resistors effectively suppresses signal reflection. The rigorous impedance control scheme significantly improves the reliability of memory access and data transmission rate, providing the necessary storage support for the high-performance operation of the terminal.

[0042] In some embodiments, the VIN pin of the MP9486A step-down chip is connected to the external power input, the EN pin is connected to the enable control circuit, the SW pin is connected to the power inductor, and the FB pin is connected to the feedback resistor network.

[0043] In this embodiment, the VIN pin of the MP9486A step-down chip is connected to the external power input through a π-type filter circuit to effectively suppress power supply noise; the EN pin is connected to the enable control signal of the main control module through a voltage divider resistor network to realize soft start and shutdown control; the SW pin is connected to the input terminal of the power inductor through a copper foil ground area to form an efficient power transmission path; the FB pin is connected to a voltage divider feedback network composed of precision resistors to monitor the output voltage in real time and form a closed-loop regulation.

[0044] This embodiment constructs a stable and efficient power conversion system through optimized circuit design of each functional pin of the MP9486A. Input filtering ensures power quality, enable control realizes intelligent power consumption management, power path design minimizes conduction losses, and feedback network ensures voltage accuracy.

[0045] Please see Figure 2 In some embodiments, a Type-C power supply interface is also included, which is circuit isolated from the vehicle power supply interface through diodes D5 and D8.

[0046] In this embodiment, the VBUS pin of the Type-C power supply interface is connected to the system power bus through a D5 Schottky diode, while the vehicle power supply interface is connected in parallel to the same power bus through a D8 Schottky diode. The two diodes are connected in a common cathode configuration, with their anodes connected to different power sources and their cathodes connected to the system load circuit, forming an OR logic power supply structure.

[0047] This embodiment achieves intelligent switching of the power supply system through a dual-diode isolation circuit. The D5 and D8 Schottky diodes minimize power loss due to their low voltage drop characteristics. At the same time, the unidirectional conductivity of the diodes effectively prevents current backflow between different power sources, ensuring the safe coexistence of the Type-C interface and the vehicle power supply. This achieves seamless switching of power sources and significantly improves the reliability and applicability of the terminal power supply system.

[0048] Unlike existing technologies, the above technical solution employs a UIS8310 processor as the main control module, an SR3595D chip as the RF module connected to the main control via an SPI interface, MP9486A and SC2720A chips to form a power management module communicating with the main control via an I2C interface, a Wi-Fi module connected to the main control via a USB 2.0 interface, DDR2 memory and NAND flash memory connected to the main control via a DDR2 bus and an SPI interface respectively, a high-gain antenna connected to the RF module via an SMA interface, and a BMS communication interface connected to the main control via a serial interface. The UIS8310 main control and SR3595D RF module work together to support high-speed TD-LTE data transmission, and the Wi-Fi module meets the needs of multi-device connectivity. The high-gain antenna can be flexibly adjusted to improve signal strength. The power management module ensures stable power supply through the MP9486A's wide voltage input and the SC2720A's protection mechanism. The BMS communication interface provides the hardware foundation for battery monitoring. The standardized interface achieves a compact connection, significantly improving the device's shock resistance, dust resistance, and temperature adaptability.

[0049] The above description is only a part of the embodiments of this utility model, and does not limit the scope of protection of this utility model. Any equivalent device or equivalent process transformation made based on the content of this utility model specification and drawings, or direct or indirect application in other related technical fields, are similarly included in the patent protection scope of this utility model.

Claims

1. A vehicle-mounted internet access device, characterized in that, It includes a main control module, radio frequency module, power management module, Wi-Fi module, storage module, antenna module, and BMS communication interface; The main control module is configured with a UIS8310 processor; The radio frequency module is configured with an SR3595D chip, which is connected to the main control module via an SPI interface. The power management module includes an MP9486A step-down chip and an SC2720A power management chip. The MP9486A step-down chip is connected to an external power supply, and the SC2720A power management chip is connected to the main control module via an I2C interface. The Wi-Fi module is connected to the main control module via a USB 2.0 interface; The storage module includes DDR2 memory and NAND flash memory. The DDR2 memory is connected to the main control module via a DDR2 bus, and the NAND flash memory is connected to the main control module via an SPI interface. The antenna module includes a high-gain antenna, which is connected to the radio frequency module via an SMA interface. The BMS communication interface is connected to the main control module via a serial communication interface.

2. The vehicle-mounted internet access device according to claim 1, characterized in that, The antenna module also includes a magnetic mounting base, which is mechanically connected to the high-gain antenna and is used to magnetically fix the high-gain antenna to the top surface of the vehicle.

3. The vehicle-mounted internet access device according to claim 1, characterized in that, Also includes: The protective housing contains the main control module, radio frequency module, power management module, Wi-Fi module, storage module and BMS communication interface. The protective housing is made of ABS+PC composite material and is filled with shock-absorbing foam.

4. The vehicle-mounted internet access device according to claim 1, characterized in that, The SC2720A power management chip has overvoltage protection circuit, overcurrent protection circuit and undervoltage protection circuit.

5. The vehicle-mounted internet access device according to claim 1, characterized in that, The GPIO1 pin of the UIS8310 processor is connected to the enable pin of the Wi-Fi module, the GPIO2 pin is connected to the reset pin of the RF module, and the GPIO3 pin is connected to the enable control circuit of the BMS communication interface.

6. The vehicle-mounted internet access device according to claim 1, characterized in that, The CE, WE, and RE pins of the NAND flash memory are connected to the chip select signal, write enable signal, and read enable signal of the main control module, respectively, and the IO0-IO3 data pins are connected to the SPI interface of the main control module.

7. The vehicle-mounted internet access device according to claim 1, characterized in that, The 485 interface of the BMS communication interface includes A and B differential signal pins and a GND pin.

8. The vehicle-mounted internet access device according to claim 1, characterized in that, The A0-A12 address pins and D0-D15 data pins of the DDR2 memory of the storage module are connected to the corresponding pins of the main control module, and impedance matching is performed through terminating resistors.

9. The vehicle-mounted internet access device according to claim 1, characterized in that, The MP9486A step-down chip's VIN pin is connected to the external power input, the EN pin is connected to the enable control circuit, the SW pin is connected to the power inductor, and the FB pin is connected to the feedback resistor network.

10. The vehicle-mounted internet access device according to claim 1, characterized in that, It also includes a Type-C power supply interface, which is circuit isolated from the vehicle power supply interface through diodes D5 and D8.

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