基于GPS技术的速度标准装置研究

本文介绍了一种利用GPS 技术研制的公路测速系统速度标准装置，通过GPS 接收处
理模块，采用多普勒频移变换速率的测量方式，可直接输出与速度成比例的数字脉冲频率信号，经滤波、放大、整形后，送入单片机运算处理，以实现对机动车速度和里程的测量。本标准装置适用于各种具有超速拍照功能的机动车超速自动监测系统的检定与校准。
关键词：GPS；单片机；机动车超速自动监测系统；测速

Research on standard equipment of speed based on GPS technology ZHAO Jun，LIU Mei Sheng, YANG Chun-Sheng，JIANG Dong， (National Institute of Measurement and Testing Technology，ChengDu 610021) Abstract：A standard equipment of highway speed measurement system using GPS technology introduced in this paper. Through the GPS receiver module, using Doppler frequency shift transform the rate measurement method, Digital pulse-frequency signals proportion to the number of vehicle speed can be output directly. By filtering, amplifing and adjusting,then into the microcontroller processing, to achieve the vehicle speed and mileage measurement. The standard equipment applied to test and calibration of all kinds of automatic devices with overspeed and camera monitoring functions.
Key words：GPS；single chip microcomputer；vehicle overspeed auto-monitoring system；
speed measurement