Analysis and calculation object detection capture rate in multi-sky-screens across measurement system

In this paper, a new calculation method on the capture rate of multi-sky-screens across measurement system was researched and analyzed. The measurement principle of multi-sky-screens across measurement system was introduced, and the optical detection principle and detection sensitivity were discussed based on photometric theory. According to the relation of detection screen thickness, projectile length and photoelectric detector performance, and the gradient screen characteristic, the calculation expression of capture rate on multi-sky-screens across measurement system was induced and analyzed in detail. From the three kind states relation between projectile length and detection screen thickness, the function of capture rates was analyzed and calculated by experimentation under different detection distances and different environments. The result shows when the projectile length is more than and equal to the detection screen thickness under the same conditions, the capture rate is highest; when the projectile length is less than the detection screen thickness, the capture rate will reduce; and the gradient screen's capture rate is less than vertical screen, those experiments are consistent with the theories analysis.