The Research Of Active Laser Screen Velocity Measuring System

In the modernization of production and scientific research, the technology of the precise velocity measurement to high-speed flying objects provides an effective support to the development of modernization. The progress of this technology is important to the research of movement capability, flight posture, flight-path of high-speed flying objects.In this paper, we use the technology of active mark with laser, develop a dual-light screen velocity measurement system, realized the velocity measurement of high-speed flying objects. Considering the noise of the environment around, the system develop a multistage filtering circuit to process the light signal and noise, so the system can extract the edge of the light signal. It optimizes the plan of velocity measurement and guarantees the precision of the velocity measurement. Meanwhile, the design is concise, and it's convenient to regulate. The volume of the system is small and exquisite, so it's fit for measurement outdoors.In this thesis, the main contents include:1. Designed the overall program of active light-screen precision velocity measuring system and analyzed the accuracy of the system.2. Completed the mechanical layout of active light-screen precision velocity measuring system, which includes holders of laser and detector and camera.3. Completed the design of calibrate the screen. Completed the design of surveyor's pole and the holder of laser ranging.4. Completed the design of signal acquisition circuit, amplifying circuit, filter circuit, and took many experiments to test the system and got some desired result.5. Completed some experiments to check the parameter of the signal processing circuit, and did some analysis to the result. And the system has reached all the requirements.