时间测量系统(TDC)的原理及实现

车辆与轨道间的作用力是评价车辆运行品质和线路状态的重要因素。研制能够连续精确测量轮轨力的测力轮对装置是非常必要的。由于在对高速动车组轮轨力性能参数的测量中,其温度变化、强电磁场往往会给传统模拟测试系统带来误差。于是,采用了以CMOS技术组成的TDC时间数字测量系统。由TDC的转换原理可知,TDC可在强电磁场下工作,并为数字输出。本文重点讨论了TDC测量原理。不仅如此,也讨论了在工程测量中应变测量的硬件实现和温度偏移、零点偏移的调整。

Principle of time-to-digital converter and its realization

Vehicle and track interaction is important factors of the evaluation of operation quality of vehicles and line status.It is necessary to develop a continuous measurement of wheel rail force measuring wheelset device.In the measurement of performance parameters of high speed EMU temperature changes and electromagnetic field often bring error to the traditional simulation test system.Then,adoption of the CMOS technique consisting of TDC time to digital converter.By the TDC conversion principle knowable,TDC can work in strong electromagnetic field and it is digital output.The discussion focuses on TDC measurement principle.Not only that,but also discussed the engineering measurement of strain measurement hardware implementation and temperature drift,zero offset adjustment.