| 摘要 |
PROBLEM TO BE SOLVED: To provide a method and a system for detecting a worker around construction machinery with an arm member, which keep variations in detection distance in an approach direction small. SOLUTION: A directional antenna 14 directed to the side of the arm member 3 together with a nondirectional antenna 17 is mounted on the body section 2 of the working machine 1 with the movable arm member 3 operating on a job site 9; the worker 10 in the job site 9 holds an active RFID tag 11 which transmits an ID signal; and the worker 10 getting closer to the periphery of the working machine 1 is detected by the reception of the ID signal of either the nondirectional antenna 17 or the directional antenna 14. Preferably, the pair of directional antennae 14a and 14b directed to the side of the arm member 3 is mounted on both the sides of the arm member 3 of the body section 2 of the working machine 1, respectively. More preferably, the pair of directional antennae 14a and 14b is mounted on the locations, different in height from each other, of the body section 2 of the working machine 1, respectively. COPYRIGHT: (C)2009,JPO&INPIT
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