| 摘要 |
PROBLEM TO BE SOLVED: To measure the displacement of an object with low costs and high accuracy. SOLUTION: A direct-acting displacement measuring device 4 projects lights onto the mirror surface 2a of a mirror surface body 2, and measures the detecting point of a reflected light. The direct-acting displacement measuring device 4 calculates the displacement of the object 1 on the basis of the measured displacement of the reflected light. The direct-acting displacement measuring device 4 transmits the calculated displacement to a personal computer 7 through an antenna 5 using radio communications.
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