GB669462A - Improvements in or relating to equipment for use with electrical resistence strain gauges - Google Patents

Improvements in or relating to equipment for use with electrical resistence strain gauges

Info

Publication number
GB669462A
GB669462A GB767946A GB767946A GB669462A GB 669462 A GB669462 A GB 669462A GB 767946 A GB767946 A GB 767946A GB 767946 A GB767946 A GB 767946A GB 669462 A GB669462 A GB 669462A
Authority
GB
United Kingdom
Prior art keywords
resistance
calibrating
battery
galvanometer
resistances
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.)
Expired
Application number
GB767946A
Inventor
Frank Aughtie
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.)
National Research Development Corp UK
Original Assignee
National Research Development Corp UK
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 National Research Development Corp UK filed Critical National Research Development Corp UK
Priority to GB767946A priority Critical patent/GB669462A/en
Publication of GB669462A publication Critical patent/GB669462A/en
Expired 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
    • G01L1/225—Measuring circuits therefor

Landscapes

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

Abstract

669,462. Electrical strain gauges. NATIONAL RESEARCH DEVELOPMENT CORPORATION. April 12, 1947 [March 12, 1946], No. 7679/46. Addition to 586,268. Class 37. The parent Specification describes a bridgeconnected electrical strain gauge having a calibrating resistance for passing a current, corresponding to a specified strain, through the galvanometer and an additional network for rendering the calibration unaffected by the initial balancing adjustment of the bridge. In the present Specification a further network, connected to the calibrating resistance, permits that resistance to be of a much lower value than that used in the former case. In one embodiment the calibrating resistance R37 is connected through a switch S to the point of connection of two resistances R41, R42 which bridge the battery B7, and which are so chosen that the potential drop across R37 is considerably reduced, e.g. onehundredth of battery voltage. The calibrating resistance is made correspondingly low in order that the correct calibrating current may pass through the galvanometer. A series of settings may be obtained by connecting the resistance R37 through a selecting switch to one of a number of tapping points on the potentiomater across the battery. The Specification also discusses mathematically the possibility of reduction of error in calibration for different positions of the slider and deduces that the ideal distribution of potential along the slide wire is parabolic. For practical purposes a reasonable approximation is obtained by two tappings to the ends of the middle section R23, as in the Figure, but greater accuracy is obtained by additional tappings through resistances of suitable value, see Fig. 8, not shown.
GB767946A 1946-03-12 1946-03-12 Improvements in or relating to equipment for use with electrical resistence strain gauges Expired GB669462A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB767946A GB669462A (en) 1946-03-12 1946-03-12 Improvements in or relating to equipment for use with electrical resistence strain gauges

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB767946A GB669462A (en) 1946-03-12 1946-03-12 Improvements in or relating to equipment for use with electrical resistence strain gauges

Publications (1)

Publication Number Publication Date
GB669462A true GB669462A (en) 1952-04-02

Family

ID=9837712

Family Applications (1)

Application Number Title Priority Date Filing Date
GB767946A Expired GB669462A (en) 1946-03-12 1946-03-12 Improvements in or relating to equipment for use with electrical resistence strain gauges

Country Status (1)

Country Link
GB (1) GB669462A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111166358A (en) * 2018-11-13 2020-05-19 深圳市理邦精密仪器股份有限公司 Pressure zero point correction method, device, equipment and computer readable storage medium

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111166358A (en) * 2018-11-13 2020-05-19 深圳市理邦精密仪器股份有限公司 Pressure zero point correction method, device, equipment and computer readable storage medium
CN111166358B (en) * 2018-11-13 2023-04-14 深圳市理邦精密仪器股份有限公司 Pressure zero point correction method, device, equipment and computer readable storage medium

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