We validate the feasibility of velocity transducer based on the laser diode self-mixing effect. Single laser diode sensor prototype is developed. Standard deviation of velocity measurement result is 0.22 % in road test.  本文验证了基于自混合效应的速度传感器的可行性,并设计了单激光二极管速度传感器,其标准偏差为0.22%。