全苏铁道运输科学研究院研制了一种测量机车和电动车组车速的多普勒测速仪,用它来检查极限粘着下机车车轮的滑行情况。这种测速仪的工作原理是:用超高频率照射路面和接收反射信号。测定照射信号和接收信号的频率差(多普勒频率),就能确定机车的运行速度。多普勒测速仪的功能可以扩大,还可以作 All-Su Tientsin Railway Transportation Research Institute has developed a Doppler velocimeter for measuring the speed of locomotives and EMUs, which is used to check the gliding of locomotive wheels under extreme adhesion. The working principle of this tachometer is to illuminate the road surface with ultra-high frequencies and receive reflected signals. Determine the radiation signal and the received signal frequency difference (Doppler frequency), you can determine the locomotive speed. Doppler velocimetry can be expanded to work