A Combined Measurement and Reconstruction System Applied on Large Size Workpiece Manufacture

一種應用於大尺寸工件的組合式測量及重構方法

耿欣(Xin Geng) ； 張福民(Fu-Min Zhang) ； 畢超(Chao Bi) ； 曲興華(Xing-Hua Qu) ； 段玲(Ling Duan) ； 張進(Jin Zhang)

《中國機械工程學刊》 33卷6期 (2012/12) Pp. 487-496

https://doi.org/10.29979/JCSME.201212.0003

摘要

本文針對測量和重建在工業現場大尺寸工件製造中的需要，提出了一種適用於大尺寸工件的非接觸式三維測量方法。基於多資料融合的原理，建立了一套高精度三維重構系統，它集成了光學，數位成像和電腦視覺技術。可以有效的減少逆向工程中由於掃描拼接而造成的累積誤差，提高掃描測量精度。為了滿足工業應用的測量要求，所採用的表面重建演算法充分考慮了擬合精度和效率。文章給出了它應用於工業現場大尺寸管道加工和測量的驗證試驗，並給出了現場採集和重構的資料，資料表明，系統的精度可以達到0.087mm，這一高效的測量系統滿足了工業領域大型零件加工時的尺寸控制要求。儘管現場試驗給出了令人滿意的結果，但是後期還需要進行進一步的試驗和驗證。

並列摘要

A detailed study of measurement and reconstruction of large workpieces in industrial manufacture and measurement fields is proposed in the paper. It is based on the mathematical principle of multi-data fusion, which overcomes the difficulties exist in other measurement methods. Therefore, a non-contact 3D measurement system integrated of optics, digital imaging and computer vision technologies is set up. And then multi-data fusion method proposed is applied to the measurement system established. With the reduction of cumulated error produced during the 3D measurement process, the accuracy can be improved significantly. In order to fully meet the measurement requirements of industrial applications, precision and efficiency requirements are taken into consideration in the algorithm of surface reconstruction. Finally, the method proposed is applied on the data acquisition of a large industry tube and then results are displayed that the accuracy of the system is up to 0.087mm, which indicates the precision and practicability of the method used as an effective automation solution for measurement and reconstruction of large objects. Although a number of tests and comparison of the method have derived satisfactory results, additional investigations to provide further justification and verification are required.

並列關鍵字

large-size ； digital photography measurement ； tubular object ； surface parameterization