Measurement and characterization of ultra-thin gaps in cylindrical assembling parts

Guangxi Dong; Lingbao Kong; Sijia Liu

doi:10.1117/12.2586573

12 March 2021 Measurement and characterization of ultra-thin gaps in cylindrical assembling parts

Guangxi Dong, Lingbao Kong, Sijia Liu

Proceedings Volume 11763, Seventh Symposium on Novel Photoelectronic Detection Technology and Applications; 117633I (2021) https://doi.org/10.1117/12.2586573
Event: Seventh Symposium on Novel Photoelectronic Detection Technology and Application 2020, 2020, Kunming, China

Abstract

Ultra-thin gaps between two metallic workpieces in assembling parts need to be measured and characterized, for determining the assembling accuracy and further ensuring the final performance of the parts. Methods such as fringe projection or optical profilers encounter the difficulties in distinguishing such micro features in several tens of micrometers. In this paper, a microscopic imaging system combining image processing algorithms is designed and developed to measure the thickness of such air gaps. Simulation studies are undertaken to validate the feasibility of the proposed method. A measuring system is then designed and developed, based on which a series of measurement experiments is carried out to verify the measuring accuracy and precision. Finally, a cylindrical assembling parts with thin gaps are measured and characterized. The proposed measuring method is useful to determine the shape of air gap and the local contact situation for assembling parts.

Citation Download Citation

Guangxi Dong, Lingbao Kong, and Sijia Liu "Measurement and characterization of ultra-thin gaps in cylindrical assembling parts", Proc. SPIE 11763, Seventh Symposium on Novel Photoelectronic Detection Technology and Applications, 117633I (12 March 2021); https://doi.org/10.1117/12.2586573

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