| 摘要 |
PROBLEM TO BE SOLVED: To enable high precision detection of the straight line position of a rectilinear moving object by a stepping motor, even under high radiating environment, and control thereof, by using a radiation-resistant rotation detector using a proximity sensor of simple structure, and by monitoring the pulse control of the stepping motor. SOLUTION: In a device for rectilinearly moving the moving object 5 via a rectilinear moving mechanism 2 for converting rotation motion of the stepping motor 1 into rectilinear motion, the rotation detector 6 is provided to journal a synchronous rotary shaft 7 connected to a rotary shaft 1a of the stepping motor 1, an impeller 8 is provided in the synchronization rotary shaft 7, a first proximity sensor PX-A and a second proximity sensor PX-B are fixed at positions respectively facing one of the blades 8b in the impeller 8, and the first proximity sensor PX-A and the second proximity sensor PX-B are provided to bring the one sensor to a position semi-facing one of the blades, when the other sensor completely faces the other of the blades. COPYRIGHT: (C)2006,JPO&NCIPI
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