| 摘要 |
PROBLEM TO BE SOLVED: To measure the minimum operation voltage with a high precision in a short time, and prevent a measurement error from occurring. SOLUTION: An operation position L (v) of a vane coupling plate 22 is successively detected by a laser displacement gauge 5, the detected operation position is compared with the final operation position L of the vane coupling plate 22 memorized in the final operation position determination part 6, and a normal stop position of the vane coupling plate 22 is detected. At this time, since a driving voltage applied to a rail coil is detected as the minimum operation voltage, measurement precision of the minimum operation voltage of a rail relay 2 can be improved, the minimum operation voltage can be measured automatically, and measuring time can be shortened, thereby improving work efficiency. COPYRIGHT: (C)2008,JPO&INPIT
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