The X-ray penetrates the inspected material and is received by the X-ray digital flat panel detection. The X-ray signal is converted into a digital signal. After computer processing, the defect nature, size, location and other information inside the inspected material are displayed on the monitor screen. . The X-ray digital flat panel detection direct imaging technology system is mainly composed of five parts: a ray source, a digital flat panel, a computer image processing system and a matching auxiliary mechanical device on-site monitoring system. Currently used X-ray digital flat panel detection technologies include amorphous silicon, amorphous selenium and CMOS. Compared with radiographic film imaging technology, X-ray digital flat panel detection has the following main advantages:
(1) Transillumination of the inspected workpiece can immediately obtain digital images, with fast inspection speed and work efficiency
(2) No film is required, no darkroom processing is required, and no chemical environmental pollution is caused.
(3) Digital image storage, transmission, retrieval, and observation are convenient.
(4) The amount of exposure can be reduced, the latitude is large, and the exposure parameters are easy to choose.