JPS55118242A - Optical sensing system - Google Patents

Optical sensing system

Info

Publication number
JPS55118242A
JPS55118242A JP2630679A JP2630679A JPS55118242A JP S55118242 A JPS55118242 A JP S55118242A JP 2630679 A JP2630679 A JP 2630679A JP 2630679 A JP2630679 A JP 2630679A JP S55118242 A JPS55118242 A JP S55118242A
Authority
JP
Japan
Prior art keywords
optical
mode group
optical fiber
abnormal overheat
point
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
JP2630679A
Other languages
Japanese (ja)
Inventor
Takeshi Koseki
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP2630679A priority Critical patent/JPS55118242A/en
Publication of JPS55118242A publication Critical patent/JPS55118242A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/001—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for superconducting apparatus, e.g. coils, lines, machines
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/60—Superconducting electric elements or equipment; Power systems integrating superconducting elements or equipment

Landscapes

  • Burglar Alarm Systems (AREA)
  • Emergency Alarm Devices (AREA)
  • Optical Communication System (AREA)

Abstract

PURPOSE:To estimate the degree of failure, if necessary and to position the failure point of the system in linear distribution, by using the mode conversion by abnormal overheat for optical fibers. CONSTITUTION:The optical fiber 3 is located along the linear heater 2 of the unit 1 in normal measurement. The optical fiber 3 is led to the location sufficiently apart from the unit 1, and optical pulse is transmitted through the provision of the optical pulse generator 4 at the transmission end. The optical detector 5 and the display unit 6 are provided at the reception end to display the reached optical pulse waveform. When the first propagation mode group specified for the optical fiber 3 is excited at the transmission end, mode conversion from the first propagation mode group to other propagable second mode group is made if abnormal overheat point A is present in the linear heater 2. The difference of arrival time of the first and second propagation mode group optical waves to the reception end is monitored to inform the position of the abnormal overheat point A.
JP2630679A 1979-03-07 1979-03-07 Optical sensing system Pending JPS55118242A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2630679A JPS55118242A (en) 1979-03-07 1979-03-07 Optical sensing system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2630679A JPS55118242A (en) 1979-03-07 1979-03-07 Optical sensing system

Publications (1)

Publication Number Publication Date
JPS55118242A true JPS55118242A (en) 1980-09-11

Family

ID=12189673

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2630679A Pending JPS55118242A (en) 1979-03-07 1979-03-07 Optical sensing system

Country Status (1)

Country Link
JP (1) JPS55118242A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0415709A2 (en) * 1989-08-31 1991-03-06 Westinghouse Electric Corporation Hydraulic sensor for quench detection and location in superconductors
DE4124433C2 (en) * 1990-08-20 2003-02-20 Siemens Ag Circuit arrangement with an electrical conductor and a device for detecting the temperature along the electrical conductor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0415709A2 (en) * 1989-08-31 1991-03-06 Westinghouse Electric Corporation Hydraulic sensor for quench detection and location in superconductors
DE4124433C2 (en) * 1990-08-20 2003-02-20 Siemens Ag Circuit arrangement with an electrical conductor and a device for detecting the temperature along the electrical conductor

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