Research And Implementation Of Remote Monitoring Terminal For Pure Electric Vehicle Based On GB/T 32960

Recently,due to the importance of resource shortage and environmental pollution caused by traditional automobiles,new energy vehicles have been developing rapidly.With the implementation of a series of plans in China,the development of new energy vehicles has risen to the height of national strategy.At the same time,the state also raised requirements and supervision for new energy vehicles in terms of safety and performance.Among them,the GB/T 32960 "technical specification for electric vehicle remote service and management system",which began to be implemented in 2017,requires enterprises to establish a monitoring platform for new energy vehicles and monitor the key factors such as vehicle and power battery.This thesis mainly describes the development of monitoring terminal that meets this standard.First of all,this thesis analyzes the requirements and communication protocols of GB/T 32960 specification,and clarifies the system requirements.The remote service and management system of electric vehicle is composed of vehicle monitoring terminal and remote service platform.The vehicle terminal is installed in the target vehicle,and the main working condition data on the body are collected through the CAN bus,such as SOC,motor information,motor controller and other real-time parameters,and stored in the vehicle equipment.At the same time,the data is packaged as packets according to requirements,and then sent to the service platform through 4G mobile network after adaptive Huffman lossless compression coding.The service platform uses the B/S architecture.After receiving the message from the vehicle terminal,the data is parsed and stored in the database.At the same time,the monitoring personnel can view the real-time data of the target vehicle through the WEB,and download the analysis of the historical data.The monitoring center can also give instructions such as parameter setting,program remote upgrading and so on.Then the vehicle terminal is demonstrated and hardware designed.Under the premise of meeting the functional requirements,a device with low power consumption or sleep mode is adopted.The vehicle terminal uses the 32 bit processor LPC1758 chip of the Cortex-M3 kernel to collect the data with the TJA1042 CAN transceiver,and stores it on the SD card by the date,uses the 4G LTE module SIM7600 CE to transmit the wireless data TCP/IP,and uses the NEO-7N module to collect the GPS information.According to the chip data handbook,we finish the design of vehicle terminal schematic and PCB board.The design of vehicle terminal software is divided into bootstrap program(Bootloader)and application program,the purpose is to achieve remote IAP application upgrade.The application architecture is based on the open source embedded operating system(C/OS-II)to realize the cooperative and efficient operation of multi task.This thesis designs 10 tasks,such as CAN bus collecting data task,4G data sending task and so on,and formulating the inter task communication mechanism to synchronize each task,and avoid accessing public resource conflicts.Finally,carry on the vehicle terminal test.The terminal can be installed on a certain type of autonomous electric vehicle,and the verification function is analyzed.The vehicle terminal can collect,store and send CAN data according to the requirements.It is in good coordination with the service platform to achieve the design requirements.