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| Large Surface Measurement Method of Effectively Eliminating Multi-view Stitching Accumulative Error |
| SHAO Wei1,PENG Peng1,ZHOU A-wei2,GAO Rui-peng1 |
1.Xi’an University of Technology, Xi’an, Shaanxi 710048, China
2.Xi’an Polytechnic University, Xi’an, Shaanxi 710048, China |
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Abstract For the purpose of improving the accuracy of measuring large-sized curved surfaces, precision machines, photoelectric technology, CAD/CAM/CAT and automatic control technology are employed comprehensively, and high-precision measuring equipment and numerically controlled processing equipment are combined to realize the integration of on-line inspection and processing of large-sized curved surfaces. According to a detailed analysis of factors that affect the precision of splicing sub-contours of a multi-view sequence, both a contour splicing strategy based on mutual reference and a splicing method based on integral error compensation are proposed to diminish the effect of accumulative errors resulting from multi-view splicing. Subsequently, quadratic assignment of accumulative errors is achieved in line with the principle that the closed continuous splicing error of contours is zero in the end, thus reducing the accumulative errors resulting from continuous splicing of sequential contour data. The results show that the accuracy of this system is higher than 20μm.
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Received: 06 March 2018
Published: 06 November 2018
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2018, Vol. 39 
