JPS5722523A - Temperature sensor using optical fiber - Google Patents

Temperature sensor using optical fiber

Info

Publication number
JPS5722523A
JPS5722523A JP9715680A JP9715680A JPS5722523A JP S5722523 A JPS5722523 A JP S5722523A JP 9715680 A JP9715680 A JP 9715680A JP 9715680 A JP9715680 A JP 9715680A JP S5722523 A JPS5722523 A JP S5722523A
Authority
JP
Japan
Prior art keywords
light
sphere
fibers
temperature sensor
glass sphere
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
JP9715680A
Other languages
Japanese (ja)
Inventor
Kunihiro Asakino
Mutsuo Fujita
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.)
NIPPON DORAIKEMIKARU KK
Nippon Dry Chemical Co Ltd
Original Assignee
NIPPON DORAIKEMIKARU KK
Nippon Dry Chemical 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 NIPPON DORAIKEMIKARU KK, Nippon Dry Chemical Co Ltd filed Critical NIPPON DORAIKEMIKARU KK
Priority to JP9715680A priority Critical patent/JPS5722523A/en
Publication of JPS5722523A publication Critical patent/JPS5722523A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
    • G08B21/18—Status alarms
    • G08B21/182—Level alarms, e.g. alarms responsive to variables exceeding a threshold

Landscapes

  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Temperature Or Quantity Of Heat (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)

Abstract

PURPOSE:To mismatch a path for light propagation and permit a warning to be issued at the time of a fire, by connecting optical fibers by a glass sphere into which a medium with a high coefficient of thermal expansion is sealed. CONSTITUTION:A liquid with a high coefficient of thermal expansion is closed up tightly in a thermosensitive glass sphere 1, and with expansion of the liquid at a predetermined temperature, the glass sphere is destoryed. The sphere 1 combines optical fibers 3 and 4 that penetrate a box into a body in cooperation with a spring 2. Through fibers 3 and 4, light from a light source 5 is introduced into a light receiving device 6, and the received signal is transmitted to a detector 7. The temperature sensor is set at a desired position, and the sphere 1 is destroyed when fire coccurs followed by disconnection between the fibers 3 and 4, and further transmitted light is interrupted, and a detected output becomes a value under a set value, thereby allowing a warning to be issued.
JP9715680A 1980-07-16 1980-07-16 Temperature sensor using optical fiber Pending JPS5722523A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9715680A JPS5722523A (en) 1980-07-16 1980-07-16 Temperature sensor using optical fiber

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9715680A JPS5722523A (en) 1980-07-16 1980-07-16 Temperature sensor using optical fiber

Publications (1)

Publication Number Publication Date
JPS5722523A true JPS5722523A (en) 1982-02-05

Family

ID=14184699

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9715680A Pending JPS5722523A (en) 1980-07-16 1980-07-16 Temperature sensor using optical fiber

Country Status (1)

Country Link
JP (1) JPS5722523A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59134213A (en) * 1983-01-24 1984-08-01 Hideo Nagamitsu Automatic rising and falling device for rubber falling dam
JPS62147332A (en) * 1985-12-20 1987-07-01 Matsushita Electric Ind Co Ltd Optical temperature sensor
JPH03197816A (en) * 1989-01-11 1991-08-29 Otto Sensor Corp Fiber light detector
CN115172099A (en) * 2022-07-18 2022-10-11 南京氢灵新能源科技有限公司 Photovoltaic direct current side conflagration automatic disconnection connector

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59134213A (en) * 1983-01-24 1984-08-01 Hideo Nagamitsu Automatic rising and falling device for rubber falling dam
JPS6231122B2 (en) * 1983-01-24 1987-07-07 Hideo Nagamitsu
JPS62147332A (en) * 1985-12-20 1987-07-01 Matsushita Electric Ind Co Ltd Optical temperature sensor
JPH03197816A (en) * 1989-01-11 1991-08-29 Otto Sensor Corp Fiber light detector
CN115172099A (en) * 2022-07-18 2022-10-11 南京氢灵新能源科技有限公司 Photovoltaic direct current side conflagration automatic disconnection connector

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