Study on detection method of inner wall of small-diameter workpiece based on cone reflector

Wenjun Lu; Yao Yao; Chao Li; Xin Chen; Licheng Shen; Lihua Lei; Weibin Sun

doi:10.1117/12.2036090

10 October 2013 Study on detection method of inner wall of small-diameter workpiece based on cone reflector

Wenjun Lu, Yao Yao, Chao Li, Xin Chen, Licheng Shen, Lihua Lei, Weibin Sun

Proceedings Volume 8916, Sixth International Symposium on Precision Mechanical Measurements; 891646 (2013) https://doi.org/10.1117/12.2036090
Event: Sixth International Symposium on Precision Mechanical Measurements, 2013, Guiyang, China

Abstract

The image detection of the inner wall of the small-diameter workpiece is a difficult problem all along. The industrial endoscope is a common solution of this problem, but its measuring repeatability cannot be guaranteed and it results a large image distortion. In this paper, for this problem, a new method based on the cone reflector has been presented. Firstly, this method introduces a 45-degree cone reflector innovatively, which is placed within the workpiece. Secondly, the optical devices are placed outside, which simplifies the measuring structure and make the adjustment of the optical system easier. Finally, an image conversion method is proposed, making the image observation more intuitive. Though analyses and experiments, the resolution of images obtained from the inner wall can be achieved 10μm/pixel. Meanwhile, the efficiency of measurement has been greatly improved.

Citation Download Citation

Wenjun Lu, Yao Yao, Chao Li, Xin Chen, Licheng Shen, Lihua Lei, and Weibin Sun "Study on detection method of inner wall of small-diameter workpiece based on cone reflector", Proc. SPIE 8916, Sixth International Symposium on Precision Mechanical Measurements, 891646 (10 October 2013); https://doi.org/10.1117/12.2036090

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KEYWORDS

Reflectors

Charge-coupled devices

Image resolution

Image processing

CCD image sensors

Light sources

CCD cameras

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