| 摘要 |
PURPOSE:To detect the absolute position of an object mounted on a moving body accurately, by obtaining the absolute position data of the moving and the relative position data of the mounted object on the moving body. CONSTITUTION:A moving body 1 crosses the line between a light source 6 and a photoelectric switch 7 at a specific position XA. Luminous flux is cut by the leading edge of a mounted object 4. The absolute position of the leading edge of the mounted object is XA. The signal from an induction radio transmitter 2 of the moving body 1 is received by a crossing induction radio path 2. The absolute position X1 of the leading edge of the moving body 1 is detected. When the leading edge of the mounted object 4 crosses the line between the light source 6 and the photoelectric switch 8, the absolute position of the leading edge of the moving body 1 is X2. Then a distance Y between the light source 6 and the mounted object 4 is obtained by an expression Y.tanalpha=¦X2-X1¦. Since the size of the mounted object 4 is known, the absolute position of the gravity center is computed by a data processing device 9. The absolute position data of the mounted object 4 and the speed data of the moving body are inputted 10 to a crane control device. |
