Measurement and identification of the structure parameters in the four-light-screen optical target

The structure parameters of four screens such as the parallelism, angles between the screens in four-light-screen optical target affect the precision of measurement results. This paper puts forward a method of structure parameters measurement by means of adopting vertical boards. Laser aiming devices provided in the both ends of transmitters and receivers of each light screen is to convert angle measurement into length measurement by means of the laser spot positions shown in the vertical board. This paper presents a method of identifying system structure parameters by real firing according to the principle of the equal distance between the two bullet holes in the different coordinate systems. The feasibility of the algorithm has been simulated and verified in the Matlab and in the test of real firing respectively. The results show that the measurement precision of the four-light-screen optical target is improved.