X-RAY FOREIGN OBJECT INSPECTION DEVICE

摘要

PROBLEM TO BE SOLVED: To accurately detect a foreign object being mixed into an object to be inspected that moves speedily by allowing X rays passing through the object to be inspected to reach a fluorescent plate and capturing the obtained transmission X-ray image with an image pick-up camera. SOLUTION: An object 2 to be inspected being placed on a belt conveyor 3 is successively carried and passes an inspection position part being provided at an X-ray generation source 1. The X-ray generation source 1 detects the timing of the passage of the inspection position of the object 2 to be inspected and applies X rays to the object 2 to be inspected. Application X rays successively pass through the object 2 to be inspected and the belt conveyor 3 and reach a fluorescent plate 4. In this case, when a foreign object is mixed into the object 2 to be inspected, transmission X rays have different amount of attenuation from the case when there are no foreign objects, and a foreign object is recognized in an X-ray perspective image appearing on the fluorescent plate 4. An X-ray transmission image appearing on the fluorescent plate 4 is reflected by a mirror 5 and is captured by an image pick-up camera 7. An image- processing device 8 where a video signal from the image pick-up camera 7 is inputted processes a signal, performs an operation for detecting the foreign object, and judges the presence or absence of the mixture of the foreign object.