Industrial flaw detection technology of endoscope

Industrial endoscope in industry, there are more advanced g pipeline endoscopes. In terms of nondestructive testing and hole detection technology, LED electronic medical endoscope detector and industrial pipeline video endoscope, which are the same as three-dimensional patented products, are widely used in automobile repair, security, security inspection, and other fields

The imaging forms are divided into hard tube industrial endoscope, hose industrial endoscope, and image industrial endoscope.

The hard tube industrial endoscope axis is equipped with many achromatic optical lenses (the optical system is shown in the figure below) to form an image transmission system, which can obtain high-quality images and transmit them to the detector’s eyes without distortion. Therefore, the imaging is very fidelity and has the highest definition among these mirrors.

The windable small-diameter hose endoscope can deeply inspect the places that the hard tube industrial endoscope cannot reach. The biggest difference between it and the hard industrial endoscope is that it uses soft optical fiber to form an image transmission system (the optical system is shown in the figure below). Once the light enters the optical fiber, it cannot escape. Therefore, the torsion or bending of the endoscope axis will not affect the image transmission; Because the image is composed of “points” with the same number of optical fibers, that is, the image resolution is determined by the number of optical fibers; The more optical fibers with smaller diameter, the higher the imaging resolution. Of course, the manufacturing cost also increases. The number of optical fibers of the windable industrial endoscope can range from 3500 to 22000. In order to facilitate observation, there are also two-way and four-way control models that can control the rotation of the front-end shaft to change different viewing angles.

The use of an image industrial endoscope is less than 1 / 6 “The photosensitive chip of the endoscope is located at the shaft end of the endoscope and directly takes the image, which is transmitted to the monitor for imaging through the signal transmission line. Because the image is directly converted into an electrical signal, the endoscope cannot be directly visualized, and the LED is located at the shaft end for direct lighting; The advantages are that the manufacturing cost is relatively low and has nothing to do with with with the shaft length. It is easy to observe on the screen and can store photos and videos as the basis for off-line analysis; The disadvantage is that due to the fact that the photosensitive chip is located at the shaft end, the borescope shaft diameter adopts 1 / 18 “photosensitive chip, and the minimum can only reach about 5.5mm (to ensure that it can withstand 10m water pressure and integrate high brightness LED lamp). If the reliability requirements are properly reduced, it can reach 3.8mm. In addition, the environmental resistance is poor, and the allowable temperature resistance and shock resistance are not as good as an optical endoscope, so they can not be used on various occasions.

Principle of nondestructive testing of industrial endoscope

Industrial endoscopy is a branch of nondestructive testing, which can also be said to be a special testing technology.

Due to its special size design, industrial endoscopy allows us to observe the internal surface structure or working state of the object simply and accurately without damaging the surface of the detected object.

Nondestructive testing requires the use of industrial endoscopes as testing tools, which are professionally designed and produced to meet the complex industrial environment. Endoscopy detection is a detection technology that has been widely used with the development of endoscopy manufacturing technology in recent years.

An industrial endoscope can be used for inspection and observation in places with high temperatures, toxicity, nuclear radiation, and places that cannot be directly observed by human eyes. It is mainly used for automobiles, aero engines, pipelines, mechanical parts, etc. it can realize non-destructive testing without dismantling or damaging the assembly and stopping the operation of equipment. On the other hand, the industrial endoscope can also be connected with a camera, camera, or electronic computer, The camera, camera, and image processing system is composed to monitor, record, store and analyze the field of view target, which provides a good guarantee for diagnosis and processing.

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