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针对基于位置的车辆安全预警服务对车辆位置的判定精度要求较高,以及目前卫星定位精度在成本约束条件下通常存在较大定位误差的问题,研究实现了一种用于车辆安全预警的基于条件极值和车辆历史相对位置前溯法的路上车辆相对位置判定方法,在提高运算效率的同时保证了车辆与车辆或车辆与基准参照物间相对位置的判定精度。试验研究及试验数据分析表明,该方法可提高车辆相对位置判定精度。通过应用系统测试,验证了该方法适于行车安全预警应用。
Aiming at the problem that the location-based vehicle safety early-warning service has high requirements on vehicle location accuracy and the current positioning accuracy of the satellite usually has large positioning errors under cost constraints, a new method based on the condition The extremum and the vehicle history relative location forwardtracking method on the road to determine the relative position of the vehicle while improving the computational efficiency while ensuring the vehicle and the vehicle or the relative position between the vehicle and the reference reference to determine the accuracy. Experimental research and experimental data analysis show that this method can improve the accuracy of vehicle relative position determination. Through the application of system testing, it is verified that this method is suitable for early warning application of traffic safety.