WO2002018892A3 - Displacement transducer - Google Patents

Displacement transducer Download PDF

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Publication number
WO2002018892A3
WO2002018892A3 PCT/US2001/026768 US0126768W WO0218892A3 WO 2002018892 A3 WO2002018892 A3 WO 2002018892A3 US 0126768 W US0126768 W US 0126768W WO 0218892 A3 WO0218892 A3 WO 0218892A3
Authority
WO
WIPO (PCT)
Prior art keywords
transducer
displacement transducer
measuring
displacement
resolution
Prior art date
Application number
PCT/US2001/026768
Other languages
French (fr)
Other versions
WO2002018892A2 (en
Inventor
Antonio Valdevit
Helen Kambic
Theodore Elster
Ahmed El-Said
Brian Laakaniemi
Original Assignee
Cleveland Clinic Foundation
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 Cleveland Clinic Foundation filed Critical Cleveland Clinic Foundation
Priority to AU2001285323A priority Critical patent/AU2001285323A1/en
Publication of WO2002018892A2 publication Critical patent/WO2002018892A2/en
Publication of WO2002018892A3 publication Critical patent/WO2002018892A3/en

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/45—For evaluating or diagnosing the musculoskeletal system or teeth
    • A61B5/4528—Joints
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
    • G01B7/12—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring diameters
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
    • G01B7/16—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring the deformation in a solid, e.g. by resistance strain gauge
    • G01B7/18—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring the deformation in a solid, e.g. by resistance strain gauge using change in resistance
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/45—For evaluating or diagnosing the musculoskeletal system or teeth
    • A61B5/4504—Bones

Abstract

A displacement transducer (10) capable of measuring very small displacements (on the order of 100 νm or less) comprises a strain gage (50) mounted to the curved arc (31) of a substrate (30) in a pre-stressed condition. The tansducer has a resolution of at least 10 νm, preferably at least 1 νm or better. The transducer can measure positive or negative displacement in a specimen and can also be used as an extremely sensitive load cell for very high resolution weight, load or mass determinations. The transducer can be used in a hoop strain device for measuring radial expansion of a femur or other bone.
PCT/US2001/026768 2000-08-29 2001-08-28 Displacement transducer WO2002018892A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2001285323A AU2001285323A1 (en) 2000-08-29 2001-08-28 Displacement transducer

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US22864900P 2000-08-29 2000-08-29
US60/228,649 2000-08-29
US09/938,385 US6810753B2 (en) 2000-08-29 2001-08-24 Displacement transducer
US09/938,385 2001-08-24

Publications (2)

Publication Number Publication Date
WO2002018892A2 WO2002018892A2 (en) 2002-03-07
WO2002018892A3 true WO2002018892A3 (en) 2002-10-24

Family

ID=26922540

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2001/026768 WO2002018892A2 (en) 2000-08-29 2001-08-28 Displacement transducer

Country Status (3)

Country Link
US (1) US6810753B2 (en)
AU (1) AU2001285323A1 (en)
WO (1) WO2002018892A2 (en)

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CN105403141A (en) * 2015-11-27 2016-03-16 中国科学院武汉岩土力学研究所 Circumferential strain gauge for inner wall of circular hole
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CN109780988B (en) * 2019-01-04 2020-04-28 大连理工大学 Star-shaped cantilever type strain multiplier for amplifying surface strain of multi-axis loading mechanical part in real time and design method
JP2022030201A (en) * 2020-08-06 2022-02-18 株式会社マキタ Screw fastening machine and torque sensor
CN113701858A (en) * 2021-07-20 2021-11-26 上海秋豪衡器有限公司 Upright column loading force sensor structure
CN113587836A (en) * 2021-07-30 2021-11-02 中国计量大学 In-situ calibration method for fiber grating strain sensor
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Also Published As

Publication number Publication date
AU2001285323A1 (en) 2002-03-13
US20020050174A1 (en) 2002-05-02
WO2002018892A2 (en) 2002-03-07
US6810753B2 (en) 2004-11-02

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