| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To detect the positions of workers 25 working in a pit 3 such as a coal pit. <P>SOLUTION: This pit monitoring device monitoring the positions of workers 25 entering the pit 3 having a gallery formed under the ground 7 comprises a means for reading radio IC tags fitted to the workers 25 and outputting identification signals specific to the workers by a reading/writing device 41 installed in the pit 3 and transmitting the identification signals to a monitoring device computer 43 and a detector database 77 receiving the identification signals output from the radio IC tags and storing information on the detected positions and the identification signals. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
