FR2298788A1 - Bar dynamometer with attached extensometer gauges - has some in longitudinal and others in transverse directions and has bridge network - Google Patents

Bar dynamometer with attached extensometer gauges - has some in longitudinal and others in transverse directions and has bridge network

Info

Publication number
FR2298788A1
FR2298788A1 FR7501934A FR7501934A FR2298788A1 FR 2298788 A1 FR2298788 A1 FR 2298788A1 FR 7501934 A FR7501934 A FR 7501934A FR 7501934 A FR7501934 A FR 7501934A FR 2298788 A1 FR2298788 A1 FR 2298788A1
Authority
FR
France
Prior art keywords
gauges
bar
longitudinal
attached
bridge network
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.)
Granted
Application number
FR7501934A
Other languages
French (fr)
Other versions
FR2298788B1 (en
Inventor
Georges Fouretier
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.)
Testut Aequitas SA
Original Assignee
Testut Aequitas SA
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 Testut Aequitas SA filed Critical Testut Aequitas SA
Priority to FR7501934A priority Critical patent/FR2298788A1/en
Publication of FR2298788A1 publication Critical patent/FR2298788A1/en
Application granted granted Critical
Publication of FR2298788B1 publication Critical patent/FR2298788B1/fr
Granted 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
    • G01L1/20—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress
    • G01L1/22—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress using resistance strain gauges
    • G01L1/2206—Special supports with preselected places to mount the resistance strain gauges; Mounting of supports
    • G01L1/2218—Special supports with preselected places to mount the resistance strain gauges; Mounting of supports the supports being of the column type, e.g. cylindric, adapted for measuring a force along a single direction
    • 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
    • G01L1/20—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress
    • G01L1/22—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress using resistance strain gauges
    • G01L1/2206—Special supports with preselected places to mount the resistance strain gauges; Mounting of supports
    • G01L1/2212—Special supports with preselected places to mount the resistance strain gauges; Mounting of supports particularly adapted to unbounded-wire-type strain gauges
    • 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
    • G01L1/20—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress
    • G01L1/22—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress using resistance strain gauges
    • G01L1/225—Measuring circuits therefor
    • G01L1/2262—Measuring circuits therefor involving simple electrical bridges

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)

Abstract

Bar-type dynamometer, working in compression or extension, has electrical resistance extensometer gauges attached to it. Four gauges with thin threads are positioned at the ends of two orthogonal diameters of the bar and make up two opposing arms of a Wheatstone bridge network. Such an arrangement, with some gauges (21-24) orientated in the longitudinal direction of the bar and others (31-32) in the transverse direction, enables corrections to be made for sensitivity to bending. The longitudinal gauges are made from an alloy whose Poisson number is as near as possible to that of the bar material.
FR7501934A 1975-01-22 1975-01-22 Bar dynamometer with attached extensometer gauges - has some in longitudinal and others in transverse directions and has bridge network Granted FR2298788A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7501934A FR2298788A1 (en) 1975-01-22 1975-01-22 Bar dynamometer with attached extensometer gauges - has some in longitudinal and others in transverse directions and has bridge network

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7501934A FR2298788A1 (en) 1975-01-22 1975-01-22 Bar dynamometer with attached extensometer gauges - has some in longitudinal and others in transverse directions and has bridge network

Publications (2)

Publication Number Publication Date
FR2298788A1 true FR2298788A1 (en) 1976-08-20
FR2298788B1 FR2298788B1 (en) 1979-02-09

Family

ID=9150151

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7501934A Granted FR2298788A1 (en) 1975-01-22 1975-01-22 Bar dynamometer with attached extensometer gauges - has some in longitudinal and others in transverse directions and has bridge network

Country Status (1)

Country Link
FR (1) FR2298788A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2485191A2 (en) * 1980-06-20 1981-12-24 Testut Aequitas Wheatstone bridge connected gauge wire dynamometer - has two windings parallel and two windings perpendicular to applied stress

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2485191A2 (en) * 1980-06-20 1981-12-24 Testut Aequitas Wheatstone bridge connected gauge wire dynamometer - has two windings parallel and two windings perpendicular to applied stress

Also Published As

Publication number Publication date
FR2298788B1 (en) 1979-02-09

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Legal Events

Date Code Title Description
GC Lien (pledge) constituted
ST Notification of lapse