JPS57190237A - Photo load cell - Google Patents
Photo load cellInfo
- 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
Links
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract 4
- 239000000835 fiber Substances 0.000 abstract 3
- 239000013307 optical fiber Substances 0.000 abstract 3
- 229910052742 iron Inorganic materials 0.000 abstract 2
- 238000001514 detection method Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
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.
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)
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 |
-
1981
- 1981-05-19 JP JP56075167A patent/JPS57190237A/en active Pending
Cited By (1)
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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