The Vtest-1074 high-precision laser velocimeter developed in this project is based on the principle of laser Doppler velocimetry, and adopts high-resolution and high-precision spectrum analysis signal processing methods. The measurement error of instantaneous speed is ±0.05%. The speed of the moving vehicle can be measured in real time. The project device uses a differential detection subsystem to detect Doppler signals, makes full use of the laser energy, reduces the influence of the power fluctuation of the light source on the measurement accuracy, and reduces the requirements of the system on the light source.

With the application of new techniques and methods for speed measurement of motor vehicles in recent years, the product form and function performance of the speedometer have undergone major changes: in speed measurement mode, single-point speed measurement has been expanded to single-point speed measurement, interval speed measurement and point detection. With the combination of speed and other speed measurement methods. At present, various types of laser speedometers are commonly used in the traffic police industry and are of great significance for traffic safety work.

At the acceptance meeting, the expert group of the acceptance group heard the work summary report of the project team and proposed to increase the promotion and application of the research results in order to exert good economic and social benefits.

(Original title: "High-precision laser speedometer for vehicle speed monitoring" developed by the provincial metrology institute reaches the domestic advanced level)