JPS57151803A - Sensor for erosion of optical fiber in furnace wall - Google Patents

Sensor for erosion of optical fiber in furnace wall

Info

Publication number
JPS57151803A
JPS57151803A JP3658781A JP3658781A JPS57151803A JP S57151803 A JPS57151803 A JP S57151803A JP 3658781 A JP3658781 A JP 3658781A JP 3658781 A JP3658781 A JP 3658781A JP S57151803 A JPS57151803 A JP S57151803A
Authority
JP
Japan
Prior art keywords
light
refractory body
erosion
optical fiber
lambdax
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
JP3658781A
Other languages
Japanese (ja)
Inventor
Seiji Terai
Kenji Shirai
Yasuhiro Sawada
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.)
Fujitsu Ltd
Nippon Steel Corp
Original Assignee
Fujitsu Ltd
Nippon Steel Corp
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 Fujitsu Ltd, Nippon Steel Corp filed Critical Fujitsu Ltd
Priority to JP3658781A priority Critical patent/JPS57151803A/en
Publication of JPS57151803A publication Critical patent/JPS57151803A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
    • G01B11/06—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness for measuring thickness ; e.g. of sheet material

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
  • Length Measuring Devices By Optical Means (AREA)
  • Blast Furnaces (AREA)

Abstract

PURPOSE:To perform an accurate measurement of erosion of a refractory body by means of a simple constitution, by a method wherein a plural number of photo transfer paths each, consisting of optical fibers having a reflection film at an end surface, is embedded in the refractory body, with which a furnace is lined, to different depths through the outside of a furnace wall, and a light detector is connected to said paths. CONSTITUTION:A plural number of bores 12-15, being different in a depth l from each other, are formed in a refractory body 1, with which a furnace is lined, through the outside of a furnace wall, and optical fibers 2-5 are inserted thereinto for securing until they bump against the bottoms of their respective bores. Reflection films 2a- 5a, reflecting light having a particular wavelength lambdax and transmitting other light than aforesaid light, are formed on the ends of the optical fibers 2-5. Pulse light from a light source 8a, havng the wavelength lambdax, is detected by a photo detector via an optical fiber 7, the reflection film 2a, an optical fiber 6, and a branching filter 9 for relfecting light having the wavelength lambdax. If the refractory body 1 is eroded into a dotted line, the reflection film 2a drops off, and as a result, no pulse light is detected. The other reflection films drop off in a manner described above, and this permits the reliable measurement of the erosion of the refractory body by means of a simple constitution.
JP3658781A 1981-03-16 1981-03-16 Sensor for erosion of optical fiber in furnace wall Pending JPS57151803A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3658781A JPS57151803A (en) 1981-03-16 1981-03-16 Sensor for erosion of optical fiber in furnace wall

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3658781A JPS57151803A (en) 1981-03-16 1981-03-16 Sensor for erosion of optical fiber in furnace wall

Publications (1)

Publication Number Publication Date
JPS57151803A true JPS57151803A (en) 1982-09-20

Family

ID=12473901

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3658781A Pending JPS57151803A (en) 1981-03-16 1981-03-16 Sensor for erosion of optical fiber in furnace wall

Country Status (1)

Country Link
JP (1) JPS57151803A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02193005A (en) * 1989-01-20 1990-07-30 Mitsubishi Cable Ind Ltd Wear sensor
JPH02212707A (en) * 1989-02-13 1990-08-23 Mitsubishi Cable Ind Ltd Wear sensor
GB2449708A (en) * 2007-06-02 2008-12-03 Rolls Royce Plc Optical system for determining wear between relatively movable components
US20110231110A1 (en) * 2010-03-16 2011-09-22 Johnston Robert T Fiber Optic Sensor System for Detecting Surface Wear
WO2012109183A1 (en) * 2011-02-09 2012-08-16 Siemens Energy, Inc. Multiplexed optical fiber wear sensor
FR3084662A1 (en) * 2018-08-01 2020-02-07 Saint-Gobain Centre De Recherches Et D'etudes Europeen WEAR DETECTOR FOR GLASS OVEN

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02193005A (en) * 1989-01-20 1990-07-30 Mitsubishi Cable Ind Ltd Wear sensor
JPH02212707A (en) * 1989-02-13 1990-08-23 Mitsubishi Cable Ind Ltd Wear sensor
GB2449708A (en) * 2007-06-02 2008-12-03 Rolls Royce Plc Optical system for determining wear between relatively movable components
US20110231110A1 (en) * 2010-03-16 2011-09-22 Johnston Robert T Fiber Optic Sensor System for Detecting Surface Wear
US8571813B2 (en) * 2010-03-16 2013-10-29 Siemens Energy, Inc. Fiber optic sensor system for detecting surface wear
WO2012109183A1 (en) * 2011-02-09 2012-08-16 Siemens Energy, Inc. Multiplexed optical fiber wear sensor
US8790074B2 (en) 2011-02-09 2014-07-29 Siemens Energy, Inc. Multiplexed optical fiber wear sensor
FR3084662A1 (en) * 2018-08-01 2020-02-07 Saint-Gobain Centre De Recherches Et D'etudes Europeen WEAR DETECTOR FOR GLASS OVEN

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