Industrial Endoscope Troubleshooting

Industrial endoscope is mainly used for automobile, aero engine, pipe, mechanical parts, etc., can realize nondestructive testing without disassembly or destruction of assembly and equipment stop operation.

In recent years, although the quality of endoscope has been steadily improved, as a kind of precision equipment, improper operation and collision caused by random placement of instruments may cause damage to precision optical components. The damage of industrial endoscope has the following aspects. In this article, ATO automation will introduce something about this topic.

• Image optical resolution is reduced and image blur. There are many reasons for the decrease of optical resolution in industrial endoscope, such as dirty optical components, scratches on the surface of the distal/ proximal lens, cracks in the optical channel, and fracture of the fiber image beam.
• Field of view size is changed. The field of view of a 4.3" LCD endoscope is determined by the angle between the left and right of the image at its apex, which controls the circumference of the image displayed on the field monitor. Once the field size changes, images that should be displayed will be offset or not displayed. The general reasons for this situation are: the eyepiece is damaged; video adapter fault; CCD system changes, etc.
• Image transmission distortion or halo phenomenon. Generally speaking, the image in the process of transmission, fiber optic fiber photography and lens system aperture size has a great relationship, once the transmission process of a link problems, will cause image distortion or edge blur, dim, and halo phenomenon. At this time, if the brightness of the light source is increased, the edge of the field of vision can be clearly seen, but the central part will become too bright and dazzling, which is mostly caused by the failure of the lens in the endoscope camera.
• The image is blurred or too dark. When the image is blurred or too dark, it is difficult for maintenance engineers to find out the specific problems. Generally, this fault occurs for the following reasons. The aging of fiber coloring layer and fiber causes the energy output of light source to decrease. When the light is transmitted to the optical fiber, the light bulb in the light source is not aligned with the optical fiber head or other optical components in the light source are not aligned, resulting in reduced optical output energy. There may be broken fibers or damaged fiber ends in the fiber; endoscopic system includes failures of camera, camera wire, adapter, adaptive ring, image processor, display and other parts. If you want to distinguish the specific fault location, generally use the substitution method to distinguish. Usually, if the whole image is blurred, it may be due to the fault of the endoscope system or incomplete fracture of the optical fiber. If the edge is fuzzy, it indicates that the tip fiber of the industrial borescope is not sufficiently bent or the fiber end is rough.