As an embranchment of nondestructive testing, the industrial borescope plays an important role in fields of industrial
fault diagnosing, quality controlling and product evaluating from its beginning. The electronic borescope adopts the
latest technology and is widely used now. A new portable industrial electronic borescope is designed based on CMOS
image sensor and embedded system. It consists of four parts: lighting, imaging lens, CMOS camera and embedded
system for image acquisition and processing, which has the advantages of small volume, low power consumption, and
portable. The optic system uses a reverse-telephoto configuration lens. The white LED is used as light source. A 3.6μm
pixel size of 640*480 image array CMOS image sensor is adopted. The embedded system is designed based on ARM
microprocessor as main control and processing unit. In software image processing technique is used to improve the
image. The diameter of electronic borescope probe is 10mm. It can inspect surfaces inside narrow tubes or difficult-toreach
chambers like inside engine.
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