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Endoscope Camera industrial flaw detection technology

Time:2017-08-31 Views:188

Endoscope Camera industrial flaw detection technology

Currently, in the industry, there are more advanced pipeline endoscopes. In the aspects of non-destructive testing and hole-exploration technology, industrial pipeline video endoscopes are widely used in the fields of auto repair, security, security inspection and so on.

According to imaging theory, endoscopy is divided into: rigid tube industrial endoscope, soft tube industrial endoscopy and video industrial borescope. 

The rigid tube industrial endoscope axis is equipped with a number of achromatic optical lenses to form an image transmission system, which can obtain higher quality images, and are transmitted to the examiner‘s eyes without distortion, so the imaging is very fidelity. It is also the highest resolution among these lens.
 

The small-diameter soft cable endoscope camera can be used to inspect the inaccessible area that rigid tube industrial endoscope can not reach. The biggest difference between soft cable endoscope camera and rigid industrial endoscope is  that soft cable endoscope use soft optical fiber to form the image transmission system once the light enters the fiber, the light cannot escape. Therefore, the torsion or bending of the endoscope axis does not affect the image transmission; Since the image is composed of the point which is the same as the number of fibers, that is, the image resolution is determined by the number of fibers; The more fibers with smaller diameters, the higher the imaging resolution, and of course the manufacturing cost increases. The number of industrial optical fiber of the wrap-around industrial endoscope can be from 3,500 to as high as 2,2000. For the convenience of observation, there are also two-way and four-direction control models that can control the front-end axis to change the different viewing angles. 

Video industry borescope use a sensor chip of less than 1/6" to directly capture the image at the end of the endoscope, and transmits it to the monitor through the signal transmission line. Since the image is directly converted into an electrical signal, the endoscope cannot be directly visualized. The illumination adopts the LED to be directly illuminated at the shaft end; the advantage is that the manufacturing cost is relatively low and has nothing to do with the axial length, the screen observation is easy, and the photo and video can be stored for offline analysis; the disadvantage is that the photosensitive chip is located at the axial end. The inner diameter of the endoscope is 1/18". The minimum sensitivity of the sensor chip is only 5.5mm ( withstand 10m water pressure and integrated with high-brightness LED light). If the reliability requirement is properly reduced, it can be 3.8mm. In addition, the environmental resistance is poor, the temperature and the shock resistance are not as good as those of the optical endoscope, so it cannot be applied to various occasions. 

Principle of nondestructive testing of industrial endoscope camera

Industrial endoscope camera, a branch of non-destructive testing, can also be said to be a specialized detection technique.Due to its special size design, the industrial endoscope camera allows us to observe the internal surface structure or working state of the object easily and accurately without damaging the surface of the object being inspected.Non-destructive testing requires industrial endoscopes as inspection tools which was designed and manufactured to meet the complex industrial environment. Endoscopic detection is a detection technology that has been widely used in recent years with the development of endoscope manufacturing technology.

Industrial endoscopes can be used for inspection and observation of high temperature, toxic, nuclear radiation and places that are invisible to the human eye. They are mainly used in automobiles, aero engines, pipelines, mechanical parts, etc., no need to disassemble or destroy assembly and equipment. Non-destructive testing is achieved in the event of a stop operation.  

Industrial endoscope camera application range:

Building

Though in the construction industry, endoscopes are used for not long time, but the effect is excellent. Check holes, walls, door, window joints, and water pipes where the naked eye is difficult to see. Central air conditioning, TV and network cable installation and inspection. Surface magnification inspection Electron microscopy, variants used in endoscopes, suitable for electronic circuit chips and observation of skin pores. More uses are still being explored.


Oil and gas chemical industry

Due to the particularity of the oil and gas chemical industry and the extremely high safety requirements, large pipes, irregular containers, slender seamless steel pipes, etc. are all in need of professional industrial inspection camera to inspect the internal walls carefully. 

Mechanical Overhaul
Endoscope mainly used for internal inspection of large-scale mechanical equipment, as well as observation of machine working conditions in environments with excessive temperature, toxic or too narrow environment, in order to effectively avoid the adverse effects of direct observation on the observer. The optimization and adjustment of endoscope’s structure can make a very comprehensive adjustment of the observation angle and the observation range. Operation is very simple.

Security monitor
Endoscope can be used for safety inspection, customs, etc. It is used to detect bagged items such as luggage and parcels. It is unnecessary to open the package then can be inspected. It not only ensures the efficiency of the security persons but also protects the testee’s privacy. There are also more and more anti-terrorist actions for military need endoscope.


Car overhaul

Industrial endoscopes for car inspection are relatively new directions for endoscope using. They can be used mainly in car engines, fuel tanks, brake systems, etc. where the naked eye cannot see directly. With the increase in the number of private cars and the trend of DIY, The rise of small portable electronic video endoscopes with higher image clarity will gradually become a part of the home toolbox. For the detection of the performance of the car, the engine is one of the main components to be tested. At present, some manufacturers who contact the engine, such as the engine manufacturer, will encounter problems with the internality of the engine product or the internal carbon deposition and damage repair of the automobile engine. It is not enough to judge such problems with the sound and the experience. Car endoscopes can solve this problem easily.

Power facility
Regularly check the surface of the turbine and large column wheel core of generator for damage and stress decay cracks. Detect the welding quality of the inner surface of the pressure weld of the main steam pipe, deaerator, header, etc., to see whether there are serious welding defects. During the overhaul, to check if there is micro cracks on the turbine blade, the retaining ring and the stress concentration part. The generator set and equipment in the power plant need to be keeping operating for a long time, it is necessary to check the internal operation by endoscope camera.

Pipeline chemical

Endoscope is used to inspect the weld surface quality of the weld pipe, pressure vessel, reactor, heat ex-changer, etc., stress corrosion cracks and chemical corrosion of the inner wall.

 

Aerospace

Endoscope is used to check turbine blades and guard rings, it is more accurate and efficient than traditional hand touch inspection.

 

Boiler gas turbine

Endoscope is used to inspect the inner pipe of boiler, gas turbine, and diesel engine.

 

For more information about endoscope camera, please refer to www.nuohengx.com