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This study addresses the problem of pipeline opening measurement in SASOL pipeline gallery modules by proposing the use of an industrial photogrammetry method. The position coordinates of the pipeline opening in the local coordinate system were first obtained and then converted to the overall modular coordinate system using the common point. Experiments showed that the coordinates obtained from industrial photogrammetry had an internal accord accuracy better than 0.2 mm, which satisfies the accuracy requirements for pipeline measurement. Compared with the electronic distance measuring device (EDM) method, the industrial photogrammetry method reduced the time taken for one measurement from 21.6 h to 1.5 h, which substantially increases the measurement efficiency of the method, thereby increasing its application value.

Study on pipeline photogrammetry in pipeline gallery modules in the SASOL project