Development and Research of Laser Ranging Vehicle Driving Deviation Test System 2019-01-0926

Before the new car rolls from the line, due to assembly errors, inaccurate four-wheel positioning, etc., the vehicle will run off on a flat road, which will affect the driving comfort and safety. At present, most automobile manufacturers choose to perform the deviation test in the process of vehicle rolls from the line. Compared with other detection methods, the online deviation test system is developed with high precision of laser ranging, fast response and good reliability, which can realize fast and high-precision detection of vehicle deviation. In this paper, test system software is developed based on the LABVIEW, a variety of communication methods to build the communication system, using information check and queue task processing to control, to meet the test needs. Firstly, the calculation model of the deviation of the test system is established. Considering the influence of the driving angle in the measurement, the functional structure of the test system is built to determine the main functions of each part. In the system software design, it mainly includes the main test program and communication program, which controls the entire test, realizes functions such as measuring, extracting data and processing, calculating test result and uploading. In the trial, the test system device was fabricated, installed and tested. The results show that the system can accurately measure the running deviation and the technical indicators meet the production needs of the enterprise.