Vehicle driving wandering means: cars driving on straight roads, the driver will auto adjust to the straight state, the steering wheel does not exert any force and moment, vehicles can not maintain the original straight state, deviation from the straight line travel path anomalies. This paper introduces the vehicle driving wandering relevant laws and regulations, analyzes the car and steering wheel driving wandering positional parameters, tires, suspension and steering system of relations, described a series of vehicle driving wandering hazards, such as driver fatigue, speed up the tires wear. And thus that the development of automotive driving wandering the significance of the test system. By analyzing the deviation of the test system's technical requirements, and the deviation test system using the environment, lists three possible methods for the detection of driving wandering. Deviation compared traditional testing methods, CCD image sensor solutions, fiber optic sensor solutions and advantages and disadvantages of GPS orientation measurement programs, final confirmation of program development using CCD image sensor test system driving wandering. Based on this analysis and determine the system's hardware configuration, system hardware, including image acquisition system hardware, wireless communication system hardware and the corresponding civil construction and other hardware installation. In introducing the hardware of the system, the article with the system requirements, key technology of the hardware on the system parameters of the analysis. According to the system functions that form the hardware, system software into the wireless communication module, image acquisition and processing module, the production of network communication module and the main program module. Article describes a software development project management methods to analyze the typical software development model to guide software development. Software as an important part of system development, during which the problems are many, the article highlights the typical process of system development issues (such as adjusting the camera exposure time, CCD order to open control, test vehicles and the corresponding correct VIN, the system interface control, etc.), and explains the corresponding treatment. CCD image capture conversion of coordinates to physical coordinates is to achieve detection of the key features driving wandering. This article analyzes some of the factors to achieve coordinate transformation: the arrangement of control points and the analytic method for the close-range measurements. Deviation of the test system, the control point is arranged in the test lane plane, due to control points on the same plane to solve internal and external orientation elements of both solutions will lead to instability, deviation test system will eventually abandon the Direct Linear Transformation Method for the selection of single-image space Resection algorithm. This paper introduces the LabVIEW-based test vehicle driving wandering system development process, from programming to hardware selection, software development and then the whole process.
Keywords: driving wandering, LabVIEW, image processing, automotive testing
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