CN206993132U - A communication access board for a vehicle security control Internet of Things access device - Google Patents

Abstract

A kind of communication access plate of vehicle peace control Internet of things access equipment belongs to Internet of Things field.Described communication access module is divided into data communication module, 4G wireless transport modules, magnetic card plug-in module, direct current turns die block, and it is used as LCD display template and connector modules, it is possible to achieve vehicle-mounted external RS232, RS485 signal, the transmitting-receiving of CAN, the data transfer of 4G modules, while the magnetic card plug-in module extended has also provided the user external interface and can communicated with the Zynq master chips of vehicle peace control access device terminal mainboard.The utility model is realized the collection information of environment, pacify the collection information of control terminal, the collection information transmission of running state of the vehicle is processed and displayed after eventually passing through the respective handling of Zynq process chips to Zynq process chips by uplink channel transmission to PC application ends.The utility model has good versatility, simple structure, low cost.

Description

A communication access board for a vehicle security control Internet of Things access device

technical field

The utility model relates to an interface design that satisfies common communication transmission protocols, can realize network transmission of other communication protocol modules such as RS232, RS485, CAN bus, supports wireless transmission of 4G modules, and realizes the transmission of dot matrix through a special connector. The signal line of the display panel, the signal line of the self-communication access board and the main board of the vehicle safety control Internet of Things are connected to realize the interactive communication between the board levels.

Background technique

With the popularization of Internet technology and the rapid development of embedded technology, sensor technology and wireless transmission technology, information network has an increasing influence on people's life style, and goes deep into various application fields to further exert its influence. The Internet of Things is an important part of the new generation of information technology. It connects any item with the Internet through various information sensing devices and according to the agreed agreement for information exchange and communication, so as to realize intelligent identification, positioning, tracking, A network that is monitored and managed. The Internet of Things uses a large number of various information collection sensors and devices to continuously obtain application and environmental information, and supports people to implement intelligent control of objects.

With the rapid development of the economy, road traffic is also developing rapidly, and the number of motor vehicles is increasing rapidly, which poses new challenges to traffic management. In the environment of the Internet of Things, realizing an intelligent traffic management system, that is, "Internet of Vehicles", is no longer out of reach, which will be of great help to the research and management of traffic systems. Due to its large passenger capacity and long transportation distance, buses are in a very important position in intelligent transportation systems. Therefore, real-time vehicle status information, including monitoring of video, vehicle temperature, GPS and other information, has always attracted research attention. .

Utility model content:

In view of the rapid development of the Internet of Things technology, in order to expand the application field of the existing technology and solve the above-mentioned problems, it is necessary to design an Internet of Things interface with multi-channel information data collection, reconfigurable and expandable functions, and applicable to various scenarios. into the hardware system. In this way, the design flexibility of the bus Internet of Things security control system access is guaranteed to be strong, thereby reducing the design complexity of the Internet of Things access technology promotion.

A communication access board for a vehicle security control Internet of Things access device, characterized in that it includes a data communication module, a 4G wireless transmission module, a two-way DC/DC voltage conversion module, a magnetic card plug-in module, and an LCD liquid crystal display auxiliary connector Module and motherboard board-level connector module; LCD liquid crystal display auxiliary connector module leads the signal line of the LCD dot matrix module to the communication access board through the connector; the motherboard board-level connector module connects the signal line of the communication board through the connector Lead to the vehicle security control Internet of Things access device terminal motherboard to realize the communication between the two.

The data communication module is externally used for GPIO serial port transmission, RS232, RS485, and CAN bus transmission; the data communication module includes at least one GPIO interface, one UART to RS232 interface, one UART to RS485, and one CAN bus transceiver interface module.

DC/DC conversion module, at least can output voltage value and supply power to at least one module; among them, it mainly reduces the 12V power provided by the motherboard to 3.7V to supply power to Huawei's ME3760 module; 5V is reserved for UART to RS485 adapter chip use And supply power to the USB interface.

The 4G wireless transmission module contains at least one ME3760 module to realize the communication between the vehicle security control IoT access setting terminal and the server platform.

The magnetic card plug-in module at least includes a wireless Internet access SIM card and an SD card hot-swappable external reserved interface.

LCD liquid crystal display auxiliary connector module, containing at least one 30-pin communication connector.

Mainboard board level connector module, containing at least one 60-pin board level connector.

The utility model provides an interface that supports serial port transmission of various types of protocols. The Huawei 4G network module attached to the circuit board can perform remote data transmission through the 4G module, and supports the access of peripheral cards such as SIM cards and SD cards. Realization: By adding the sensor interface and control IP core that match the interface of the expansion module, the collection of data transmitted by various serial ports is completed; and the application transmission mode of information data is set, so that it is suitable for the design of various vehicle security terminal IoT devices Requirements; At the same time, it supports SD card as a peripheral of the vehicle security terminal IoT.

Description of drawings:

Figure 1 is a circuit diagram of the Huawei ME3760 module.

Figure 2 is a circuit diagram of the MAX13487 level conversion chip.

Figure 3 is a circuit diagram of the MAX3232 level conversion chip.

Figure 4 is a circuit diagram of TXS0104E and TJA1040 level conversion chip.

Fig. 5 is a peripheral circuit diagram of the SD card slot.

Fig. 6 is a circuit diagram of the signal line connection between the communication access board and the LCD dot matrix board.

Fig. 7 is a connection circuit diagram of the signal line between the communication access board and the main board of the security control terminal.

Fig. 8 is an overall schematic diagram of the communication access board.

detailed description:

By describing the implementation process of the utility model in detail with the help of the accompanying drawings, it will help to understand the purpose and advantages of the utility model, wherein:

Figure 1 is a circuit diagram of the Huawei ME3760 module. As shown in Figure 1, the communication access board communicates with the server platform through remote data transmission through the Huawei 4G module, and communicates with the Zynq chip of the security control terminal motherboard through a pair of 4G_USB differential lines.

Figure 2 is a circuit diagram of the MAX13487 level conversion chip. As shown in Figure 2, the communication access board implements the function of UART to RS485 through the MAX13487 module, and realizes the communication function between the peripheral RS485 module and the Zynq chip through this circuit module.

Figure 3 is a circuit diagram of the MAX3232 level conversion chip. As shown in Figure 3, the communication access board implements the function of UART to RS232 through the MAX3232 module, and realizes the communication function between the peripheral RS485 module and the Zynq chip through this circuit module.

Figure 4 is a circuit diagram of TXS0104E and TJA1040 level conversion chip. As shown in Figure 4, the communication access board realizes the CAN bus transceiver function through the above two CAN bus transceiver chip modules, and realizes the communication function between the peripheral CAN bus module and the Zynq chip through this circuit module.

Fig. 5 is a peripheral circuit diagram of the SD card slot. As shown in Figure 5, according to the design manual, the pins of the SD card are pulled high and the power supply pins are filtered, and the data lines of the SD card are treated with ESD electrostatic protection tubes to prevent users from causing damage during hot swapping. electrostatic damage.

Figure 6 and Figure 7 are respectively the auxiliary connector interface circuit between the communication access board and the LCD12864 dot matrix display; the auxiliary connector interface circuit between the communication access board and the security control terminal main board.

Claims (7)

1. A communication access board for a vehicle safety control Internet of Things access device, characterized in that it includes a data communication module, a 4G wireless transmission module, a two-way DC/DC voltage conversion module, a magnetic card plug-in module, and an LCD liquid crystal display auxiliary The connector module and the board-level connector module of the main board; the LCD liquid crystal display auxiliary connector module leads the signal line of the LCD dot matrix module to the communication access board through the connector; the board-level connector module of the main board leads the signal line of the communication board through The connector leads to the main board of the vehicle security control Internet of Things access device terminal to realize the communication between the two. 2. The communication access board according to claim 1, characterized in that, the data communication module is externally used for GPIO serial port transmission, RS232, RS485, CAN bus transmission; the data communication module at least includes one GPIO interface and one UART Convert to RS232 interface, one UART to RS485 and one CAN bus transceiver interface module. 3. The communication access board according to claim 1, characterized in that, the DC/DC voltage conversion module steps down the 12V power supply provided by the motherboard into 3.7V to supply power to Huawei's ME3760 module; 5V is reserved for UART to RS485 transfer The chip uses and supplies power to the USB interface. 4. The communication access board according to claim 1, wherein the 4G wireless transmission module includes at least one ME3760 module to realize the communication between the vehicle security control Internet of Things access setting terminal and the server platform. 5. The communication access board according to claim 1, wherein the magnetic card plug-in module at least includes a wireless Internet access SIM card and an SD card hot-swappable external reserved interface. 6. The communication access board according to claim 1, wherein the LCD liquid crystal display auxiliary connector module includes at least one communication connector with 30 pins. 7. The communication access board according to claim 1, wherein the board-level connector module of the main board includes at least one board-level connector with 60 pins.