JPS57190237A - Photo load cell - Google Patents

Photo load cell

Info

Publication number
JPS57190237A
JPS57190237A JP56075167A JP7516781A JPS57190237A JP S57190237 A JPS57190237 A JP S57190237A JP 56075167 A JP56075167 A JP 56075167A JP 7516781 A JP7516781 A JP 7516781A JP S57190237 A JPS57190237 A JP S57190237A
Authority
JP
Japan
Prior art keywords
strain
spiral
attached
optical fiber
deformation
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
JP56075167A
Other languages
Japanese (ja)
Inventor
Tadaharu Ko
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 JP56075167A priority Critical patent/JPS57190237A/en
Publication of JPS57190237A publication Critical patent/JPS57190237A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L1/00—Measuring force or stress, in general
    • G01L1/24—Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet
    • G01L1/242—Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet the material being an optical fibre
    • G01L1/243—Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet the material being an optical fibre using means for applying force perpendicular to the fibre axis

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Instruments For Measurement Of Length By Optical Means (AREA)
  • Length Measuring Devices By Optical Means (AREA)

Abstract

PURPOSE:To enable to perform an average and easy detection of a load applied to a wide area, by a method wherein a plural number of circular holes is machined in an iron block, and a strain-detecting optical fiber and a dummy fiber are attached in a spiral therein to use them as detecting means. CONSTITUTION:A plural number of circular holes 10 are formed in an iron block 9, and a strain-detecting optical fiber 4 is attached in a spiral to the inner wall thereof so that it deforms corresponding to the deformation of the circular hole 10 due to an external force. Meanwhile, a dummy fiber 5 is attached in a spiral to the inside of the circular hole 10 so that it is brought to a free state, under which it is prevented from being influenced by the deformation of the circular hole 10, or it performs an opposite deformation to that of the strain-detecting optical fiber 4. Laser light is caused to simultaneously enter the two fibers 4 and 5 through the ends at one side thereof, and an external force is detected from movement of an interference fringe created due to interference of the two lights radiated through the ends at the other side.
JP56075167A 1981-05-19 1981-05-19 Photo load cell Pending JPS57190237A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56075167A JPS57190237A (en) 1981-05-19 1981-05-19 Photo load cell

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56075167A JPS57190237A (en) 1981-05-19 1981-05-19 Photo load cell

Publications (1)

Publication Number Publication Date
JPS57190237A true JPS57190237A (en) 1982-11-22

Family

ID=13568366

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56075167A Pending JPS57190237A (en) 1981-05-19 1981-05-19 Photo load cell

Country Status (1)

Country Link
JP (1) JPS57190237A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017043949A (en) * 2015-08-26 2017-03-02 国立大学法人京都大学 Assessment device for remnant tensile force of anchorage body

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017043949A (en) * 2015-08-26 2017-03-02 国立大学法人京都大学 Assessment device for remnant tensile force of anchorage body

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