基于GPS的在线车速检测校准系统设计

摘要

为解决现有车速检测校准系统由于安装位置差异所产生测量误差,检测装置数量多,拆装调试不便的问题,在了解了在线车速检测的基础上,分析基于多普勒频移算法的GPS测速特点,提出基于GPS的在线车速检测校准,并设计车速校准系统.买验结果表明,在线车速检测系统的测速精度可达0.01 m/s以上,置信度高,满足车速检测校准标准的要求.%In order to resolve the problem about the measurement error due to the installing location differences and the number of detecte devices,disassembling debugging inconvenience of the existing vehicle speed detecting system. Based on the understanding of the method of speed measurement online,analysis the GPS speed characteristics which base on Doppler frequency shift algorithm,put forward the GPS (global position system)speed measurement as vehicle online speed calibration standards and then design the speed calibration system. The results indicate that the precision of the speed was in 0.01 m/s,the degree of confidence was high. Meet the precision requirements of vehicle calibration standards.