Research on the Tracing Method of Vehicle Speedometer Based on Standard Speed System

This paper proposes and designs a laboratory simulation testing method of vehicle speedometer based on standard speed system, which can avoid the impact of environmental conditions and anthropic factor caused by on-site testing on the measurement results, and introduces the basic principle. The experimental data shows that the method is operable for the detection of vehicle speedometer, and the experimental data is stable and reliable. Subsequently, this paper evaluated the uncertainty of the measurement results, which provides technical support for ensuring the accurate traceability of vehicle speedometer.