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Title:
DETECTOR FOR DETECTING SLOPE FAILURE IN ROAD
Document Type and Number:
Japanese Patent JP2002365149
Kind Code:
A
Abstract:

To make monitoring continued after slope failure occurs.

A steel wire 1 is laid within a monitoring objective range for monitoring the slope failure, a tension converting part 3 for converting tension applied onto the steel wire 1 in the slope failure to apply it onto an optical fiber, and a fiber Bragg grating 32 for converting the tension applied to the optical fiber into a wavelength variation of light are provided outside the monitoring objective range, a light wavelength measuring instrument 5 is connected to the Bragg grating 32, and the tension applied onto the steel wire is obtained based on the measured wavelength variation.


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Inventors:
HISHIDA YASUYUKI
FUKUCHI KEISUKE
FUKUSHI MORIHISA
Application Number:
JP2001177355A
Publication Date:
December 18, 2002
Filing Date:
June 12, 2001
Export Citation:
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Assignee:
HITACHI CABLE
International Classes:
E02D17/20; G01D21/00; G01L1/24; G01L5/00; G02B6/00; (IPC1-7): G01L5/00; E02D17/20; G01D21/00; G01L1/24; G02B6/00
Attorney, Agent or Firm:
Nobuo Kinutani



 
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