Title:
MOISTURE BEHAVIOR/SUBSTANCE MIGRATION MEASURING SYSTEM IN STRATUM, SEARCHING METHOD AND OPTICAL FIBER FOR TEMPERATURE SENSOR
Document Type and Number:
Japanese Patent JP2612812
Kind Code:
B2
Abstract:
PURPOSE: To make it possible to motion and predict formation/retraction of overdried or water saturated layer, flow-out of buried contaminants, collapse of weak ground, e.g. a fill, by searching the behavior of moisture/migration of substance in a stratum for a long term while allowing the maintenance/ management of temperature distribution measuring system of the stratum to be performed for a long term.
CONSTITUTION: Optical fibers 8 are laid three-dimensionally in the stratum 1 and coupled with a measuring unit 12 which is connected electrically with an operating unit 13. Temperature on the optical fiber 8 is determined instantaneously through the use of temperature dependency of anti-Stokes scattered light of an optical pulse delivered on the optical fiber 8 and recorded in the form of three-dimensional temperature distribution of the stratum 1. Measurement is effected at some time interval and a temporal variation of the temperature variation is determined. The temporal variation is then subjected to simulator analysis thus determining the behavior of moisture/migration of substance in the stratum 1.
Inventors:
Oya Shun
Wakabayashi virtue
Takemura Tomoyuki
Katsu Masakatsu
Wakabayashi virtue
Takemura Tomoyuki
Katsu Masakatsu
Application Number:
JP16980893A
Publication Date:
May 21, 1997
Filing Date:
June 17, 1993
Export Citation:
Assignee:
Mitsui Mining & Smelting Co., Ltd.
Mitsui Metal Resources Development Co., Ltd.
Mitsui Metal Resources Development Co., Ltd.
International Classes:
G01V9/02; G01K11/12; G02B6/00; (IPC1-7): G01V9/02; G01K11/12; G02B6/00
Domestic Patent References:
| JP3130531U |
Attorney, Agent or Firm:
Yamashita
Previous Patent: FLOOR HEATER AND HEAT-TRANSFER MEMBER BURIED IN TATAMI (STRAW MAT) FOR FLOOR HEATER
Next Patent: MULTISTAGE LUNCH VESSEL
Next Patent: MULTISTAGE LUNCH VESSEL