The design of signal processing circuit for the four-light-screen optical target

In order to meet the requirement of measuring projectile impacting position with high precision in 1.5m×1.5m large sensor area, a novel large area accuracy target with four light screen targets is designed. Based on the engineering realization of the four-light-screen target, the corresponding signal processing circuits are designed in this paper. The composition of the four-light-screen target is analyzed, and the calculation method is put forward. In order to ensure that the analog signal of projectile shape did not distort after long-distance transmission, long line driving circuit and the analog signal isolating trigger circuit are designed. It can also ensure that the consistency of the transmission delay of multi-channel signals. In allusion to the convenience of the installation and debugging of the fixing site, the indicate circuit was designed. The accuracy target designed has high sensitivity and high precision which is proved through actual firing. The coordinate of impacting measuring errors less than 2.5mm compared with the cardboard target, and it can satisfy the accuracy requirement of the inspection test of the product.