Detector damage online sensing system and method based on cat eye echo image

The invention belongs to the technical field of detector damage detection, and particularly relates to a detector damage online sensing system based on cat eye echo images, which comprises a laser, a divergence angle adjusting device, a spectroscope, a direction pitching table, a detector to be detected, an image receiving device, a damage measuring and calculating module, a hardware control module and a camera lens, the camera lens and the detector to be detected form a cat eye echo device; wherein the laser, the divergence angle adjusting device, the spectroscope and the direction pitching table are sequentially arranged in the horizontal direction, and a detector to be detected is installed on the direction pitching table. The invention provides a new idea for accurately detecting the damage of the detector on line by sensing the change of the cat eye echo image on line and accurately detecting the damage condition of the detector, has the characteristics of compact light path, expandability and convenienc