| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a position detecting facility capable of securely identifying the positions of ultrasonic receiving devices, even when of shelves are high. <P>SOLUTION: Ultrasonic transmitters 21A, 21B are mounted on forklifts 10, 30, such that ultrasonic waves are transmitted in the direction of work passages 3 when work is performed with respect to zone storing spaces 6 of fixed shelves 7 by the forklifts 10, 30. The plurality of ultrasonic receiving devices for receiving the ultrasonic waves transmitted by the ultrasonic transmitters 21A, 21B are provided above the work passages 3, and the position measuring device for detecting space absolute coordinates of the ultrasonic transmitters 21A, 21B based on the detection result of the ultrasonic waves received by each of the plurality of the ultrasonic receiving devices is provided. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
