基于速度传感器和加速度传感器的测速算法应用研究

Research on Application of Speed Algorithm Based on Speed Sensor and Acceleration Sensor

该文提出一种基于速度传感器和加速度计融合的列车运行速度测量系统。该系统包含3个加速度计和2个速度传感器,3个加速度计通过三取二加权取值,2个速度传感器冗余取值。该系统通过检测速传在运行过程中的冲击率大小来判断列车的车轮是否发生空转和滑行,再结合加速度计数据和列车所在位置的实时坡度,可准确计算出列车的真实运行速度。使用该方法可解决既有轨道交通车载测速系统中使用雷达测速时遇到的天气干扰问题和在无法获取列车车身坡度时使用加速度计无法准确判断列车车轮是否空滑的问题,提升车载控制系统的可用性和安全性。

This paper proposes a train speed measurement system based on the fusion of speed sensors and accelerometers.The system contains three accelerometers and two speed sensors.The three accelerometers take two weighted values from three and two speed sensors take redundant values.By detecting the impact rate of speed transmission in the running process,the system can judge whether the wheels of the train have idling and sliding,and combining the accelerometer and the real-time slope of the train location,it can accurately calculate the true running speed of the train.Using this method can solve the problem of weather interference encountered when using radar speed measurement in the existing rail transit vehicle control system and the problem of using accelerometers to accurately determine whether the train wheels are slippery when the train body slope cannot be obtained,so as to improve the availability and safety of the on-board control system.