| 摘要 |
PROBLEM TO BE SOLVED: To provide a means for fully automating transfer of a conveyed object by a crane. SOLUTION: The crane 1 is constituted of a traveling rail 21, a girder 22, a lateral rail 23, a crab 24 and a lifting tool 27. A base station terminal 70 is provided to an upper part of a supporting part 28 of the lifting tool 27, and to a central position and both ends of a lifting beam 29. A sensor net terminal 50 is attached to upper both ends of each coil 40. The sensor net terminal 50 transmits radio packets to the base station terminal 70. The base station terminal 70 transmits a reception time of the radio packets from the sensor net terminal 50 to a crane control device 12. The crane 1 transmits a position of the base station terminal 70 to the crane control device 12. The crane control device 12 calculates the position of the sensor net terminal 50 based on the reception time of the radio packets and the position of the base station terminal 70 to detect the position of the coil 40. COPYRIGHT: (C)2005,JPO&NCIPI
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