Jun 30, 2563 BE
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The present invention relates to a method for inspecting structural members in a body to which a metallic component is attached. More particularly, the invention relates to a method for visually inspecting the appearance of a connection between a component and a body and between a body and a component to be attached to the body.
In an electronic apparatus, metallic components are often attached to and detached from a body through a socket. The appearance of the connection between the body and the component and between the body and the component after they are attached to the body is extremely important.
Conventionally, after the component is attached to the body, the appearance of the connection is checked by means of an X-ray radiographic method. In the method, a rear side of the component is placed between the body and a carrier for the body. A X-ray is radiated from the carrier, and the X-rays are absorbed by the component, the component and the body, or the component and the carrier. The X-rays passing through the component cause shadows on an image formed on an X-ray detector to be reversed, so that the shadow of the component appears on the image. It is thus possible to check the appearance of the connection by visually observing the image.
The method as described above, however, is not suited for automatically inspecting the appearance of a plurality of connections because a carrier is required for attaching a component to a body. Moreover, since an X-ray is used, the method is disadvantageous in that the X-ray is radioactive.
JP-A-63-176612 discloses an inspection apparatus which provides a tube for X-raying only a connection between a component and a body in a body, so that a part of the X-ray is shielded from the connection, without using a carrier. In the inspection apparatus, a first X-ray detector detects X-rays from a portion of the tube provided for the connection and a second X-ray detector detects X-rays from a portion of the tube provided for a non-connection. The appearance of the connection between the component and the body and that between the body and the component can be checked by visually observing a signal obtained by comparing a signal obtained by the first X-ray detector with a signal obtained by the second X-ray detector.
Since the inspection apparatus as described above uses the tube ac619d1d87
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