【摘要】 在动车运行过程中,速度和位置是保障其安全的重要数据。文章根据动车测速的要求,设计了一种雷达测速和加速度传感器测速协同工作的系统,雷达测速依据多普勒原理直接计算得到动车相对于地面的速度,加速度传感器可以监测雷达是否正常,在雷达测速的盲区,利用加速度传感器测得动车的加速度数据,通过加速度的积分得到速度值,雷达测速和加速度传感器测速相互补充。利用数字信号处理(digital signal processing,DSP)对测量数据进行处理,通过通用异步收发传输器(universal asynchronous reciver/transmitter,UART)将更可靠的速度值发往上位机。实验证明,该测速方式在复杂的铁路环境中能长期稳定地运行,满足全天候、实时性要求,在保障动车安全运行方面发挥重要作用。更多还原

【Abstract】 In Electric Multiple Unit(EMU)running process,velocity and position data are important to ensure its security.According to the requirements for EMU velocity measurement,a kind of velocity measurement system based on Doppler radar and acceleration sensor is developed.The radar can obtain the velocity of EMU relative to ground directly with Doppler principle.The acceleration sensor can monitor the working state of the radar.In radar dead zone,the value of velocity can be obtained by integrating the acceleration values measured by the acceleration sensor.The radar and acceleration sensor can complement each other.The data is processed by the digital signal processing(DSP)and more reliable velocity value is sent to the host computer through the universal asynchronous receiver/transmitter(UART).The experimental results show that this system can run stably for a long time in the complex railway environment,meeting the full-time and real-time requirements.It can play an important role in guaranteeing the EMU security.更多还原