| 摘要 |
<p>PROBLEM TO BE SOLVED: To obtain a defense management system that a monitor system is constructed at a low cost maintenance and management are easily performed malfunction is prevented, a wiring processing is faciliated and has high detecting sensitivity by detecting the distortion of a wire rope and reporting danger, based on the detected result. SOLUTION: Distortion sensor parts 10 for housing an FBG sensor for detecting the distortion of a wire rope are mounted on appropriate several parts between a wire net part 1 and an anchor bolt. The distortion sensor part 10 is connected through an optical fiber cable 2 for signal transmission with a distortion measuring equipment 3 provided so as to be separated from the wire net part 1. Thus, the distortion of the wire rope can be detected by the distortion sensor part 10, and the detected value is converted into distortion amounts by the distortion measuring equipment 3, and the location and level of the occurrence of an accident is judged by a processing part 4. In an emergency, an alarming device 5 or a warning display device 6 or the like are operated, and the accident situation is reported so that the expansion of the accident can be previously prevented.</p> |
