JPS6444595A - Method and device for detecting abnormality - Google Patents

Method and device for detecting abnormality

Info

Publication number
JPS6444595A
JPS6444595A JP20165687A JP20165687A JPS6444595A JP S6444595 A JPS6444595 A JP S6444595A JP 20165687 A JP20165687 A JP 20165687A JP 20165687 A JP20165687 A JP 20165687A JP S6444595 A JPS6444595 A JP S6444595A
Authority
JP
Japan
Prior art keywords
optical fiber
jig
light
shape changing
flood
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP20165687A
Other languages
Japanese (ja)
Inventor
Kunihiro Noba
Yukio Sakuraba
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sumitomo Riko Co Ltd
Original Assignee
Sumitomo Riko Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sumitomo Riko Co Ltd filed Critical Sumitomo Riko Co Ltd
Priority to JP20165687A priority Critical patent/JPS6444595A/en
Publication of JPS6444595A publication Critical patent/JPS6444595A/en
Pending legal-status Critical Current

Links

Landscapes

  • Fire-Detection Mechanisms (AREA)
  • Emergency Alarm Devices (AREA)

Abstract

PURPOSE:To highly accurately detect abnormal states such as flood or fire on the bottom part of or ceiling of a tank by means of simple constitution by fitting a shape changing jig for converting a change in temperature or humidity around an optical fiber into physical bending force to the optical fiber in response to the change to the optical fiber. CONSTITUTION:The shape changing jig 1 is fitted to the optical fiber. A light source for transmitting the prescribed quantity of light to the optical fiber is connected to one end of the optical fiber 2 and a light quantity measuring instrument for measuring the quantity of light transmitted to the optical fiber is connected to the other end. When the temperature is raised up to 50-60 deg.C, the jig 1 is deformed to a curved shape. When the deformation of the jig 1 is generated, the optical fiber 2 is forcedly bent and the quantity of light flowing into the optical fiber 2 is lost. Thus, the abnormal state such as flood or fire can be remotely sensed. A chemical reaction layer 6 generating a heat generating or heat absorbing reaction at the time of coming into contact with water may be arranged on the shape changing jig 1.
JP20165687A 1987-08-11 1987-08-11 Method and device for detecting abnormality Pending JPS6444595A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP20165687A JPS6444595A (en) 1987-08-11 1987-08-11 Method and device for detecting abnormality

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP20165687A JPS6444595A (en) 1987-08-11 1987-08-11 Method and device for detecting abnormality

Publications (1)

Publication Number Publication Date
JPS6444595A true JPS6444595A (en) 1989-02-16

Family

ID=16444710

Family Applications (1)

Application Number Title Priority Date Filing Date
JP20165687A Pending JPS6444595A (en) 1987-08-11 1987-08-11 Method and device for detecting abnormality

Country Status (1)

Country Link
JP (1) JPS6444595A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58163097A (en) * 1982-03-24 1983-09-27 古河電気工業株式会社 Optical fiber sensing wire
JPS61115197A (en) * 1984-11-09 1986-06-02 日本鋼管工事株式会社 Temperature detector for disaster prevention system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58163097A (en) * 1982-03-24 1983-09-27 古河電気工業株式会社 Optical fiber sensing wire
JPS61115197A (en) * 1984-11-09 1986-06-02 日本鋼管工事株式会社 Temperature detector for disaster prevention system

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