汽车道路试验系统设计

摘要

本文在分析国、内外现有的汽车道路试验技术的基础之上，深入地研究了汽车道路试验设备的特性以及试验数据采集、数据处理和数据分析的方法。采用虚拟仪器软件LabVIEw8.6作为开发工具，结合GPS设备，独立开发和研制出基于GPS汽车道路试验系统软件。整个流程是：先进行GPS系统的硬件设置，使其达到较高的定位精度；然后利用笔记本电脑来接收、处理和分析数据，完成汽车道路试验相关项目。

本课题中所用GPS设备是GARMIN公司的GPS OEM产品，它采用OEM4-G2板卡作为数据来源，提供多种通信方式(USB和九针串口)，具有高速率数据采样、低速率延迟、快速信号重捕、功耗低、抵抗恶劣环境、抗射频干扰等优势。可以达到较高的定位精度，准确的输出车辆的行驶位置经纬度，为汽车产品试验提供可靠的试验参数。

本课题从动态测量的角度出发，根据最新的国家标准和国际标准，开发出新的道路试验系统配套的软件。软件实现了通过串口来实时发送和接收试验命令和数据，满足高速率、大流量数据采样要求，并在其中加入以往试验软件中没有实现的功能：自动生成数据存放目录、试验车辆的轨迹、各种运动参数关系曲线的实时显示等。配套本软件的新系统可以进行以下试验项目：汽车最高车速试验、最低稳定车速试验、加速试验、滑行试验和制动试验。从而使新系统大大提高了道路试验的实时性、可靠性和精度。

关键词：汽车道路试验；GPS；Labview；数据；串口

ABSTRACT

This paper analyzes foreign and domestic the vehicle road test technology based on in-depth study of the characteristics of motor vehicle road test equipment and test data collection, data processing and data analysis. LabVIEw8.6 used as a virtual instrument software development tools, combined GPS device, independent research and development of a GPS-based vehicle road test system software. The whole process is: first, the GPS system's hardware settings to achieve high positioning accuracy; then use the notebook computers to receive, process and analyze data, complete vehicle road test related projects.

Used in this project GARMIN GPS device is the company's GPS OEM product, it uses OEM4-G2 board as a data source, offers a variety of communications (USB and nine-pin serial port), with a high-speed data sampling, low-rate delay, fast signal reacquisition, low power consumption, resistance to harsh environments, anti-RF interference and other advantages. Can achieve a higher positioning accuracy, the exact latitude and longitude location of the vehicle output for the automotive product testing to provide reliable test parameters.

Dynamic measurement of the subject from the point of view, according to the latest national and international standards, the development of new road test system supporting the software. Software in real time through the serial port to send and receive test command and data to meet the high-speed, high flow data sampling requirements, and add no previous experience in the implementation of the software functions: automatic generation of data storage directory, the test vehicle's trajectory, the kinds of motion parameters in real time curve display. The software supporting the new system the following test items: the maximum speed of vehicles, the lowest steady speed test, speed test, taxi test and brake test. So that the new system has greatly enhanced the real-time road test, reliability and accuracy.

Keywords: Automobile Test；Global Satellite Positioning System；Labview；Data；Serial