| 摘要 |
<P>PROBLEM TO BE SOLVED: To reflect a hydraulic tester on optimization of the next process condition by adding a scaling function to a series of test processes of the hydraulic tester. <P>SOLUTION: Migration length of both head parts 1, 2 in a hydraulic test are measured by a pulse generator system, laser type position sensors 4<SB POS="POST">1</SB>, 4<SB POS="POST">2</SB>for detecting pipe end positions of a steel pipe are installed at the respective head parts, the respective head parts are moved to match laser optical paths of the laser type position sensors to a predetermined origin before setting of the steel pipe 3, pieces of the migration length of the respective head parts are measured from a point of time when the laser optical paths are matched to the predetermined origin to a point of time when the respective laser type position sensors detect the pipe end positions of the steel pipe when the respective head parts are separated from the steel pipe via the hydraulic test, and pipe length of the steel pipe is calculated by using this measurement result. <P>COPYRIGHT: (C)2012,JPO&INPIT |
