CS-D type intelligent train velocimeter, is according to the road and line construction work of the actual need to research and development of new products. The instrument has high degree of intelligence, the function is much, simple operation, accurate speed, the use of safe, applicable scope, cost performance is good wait for a characteristic. Applicable to train amble lots of speed and monitoring, and can be used in the yard camel bee, grow up curve, electrification section and any need to test the speed of the train operation occasion. The railway line overhaul, road and other departments extensive application safety surveillance and monitoring of the ideal equipment