GB1361931A - Weighing apparatus having strain gauge transducers - Google Patents

Weighing apparatus having strain gauge transducers

Info

Publication number
GB1361931A
GB1361931A GB3287172A GB3287172A GB1361931A GB 1361931 A GB1361931 A GB 1361931A GB 3287172 A GB3287172 A GB 3287172A GB 3287172 A GB3287172 A GB 3287172A GB 1361931 A GB1361931 A GB 1361931A
Authority
GB
United Kingdom
Prior art keywords
strain gauge
voltage
difference voltage
difference
july
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
GB3287172A
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.)
REALISATIONS DINSTALLATIONS DE
Original Assignee
REALISATIONS DINSTALLATIONS DE
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
Priority claimed from FR7126538A external-priority patent/FR2150571B1/fr
Priority claimed from FR7222778A external-priority patent/FR2189719B2/fr
Application filed by REALISATIONS DINSTALLATIONS DE filed Critical REALISATIONS DINSTALLATIONS DE
Publication of GB1361931A publication Critical patent/GB1361931A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01G—WEIGHING
    • G01G23/00—Auxiliary devices for weighing apparatus
    • G01G23/18—Indicating devices, e.g. for remote indication; Recording devices; Scales, e.g. graduated
    • G01G23/36—Indicating the weight by electrical means, e.g. using photoelectric cells
    • G01G23/365—Indicating the weight by electrical means, e.g. using photoelectric cells involving comparison with a reference value
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01G—WEIGHING
    • G01G3/00—Weighing apparatus characterised by the use of elastically-deformable members, e.g. spring balances
    • G01G3/12—Weighing apparatus characterised by the use of elastically-deformable members, e.g. spring balances wherein the weighing element is in the form of a solid body stressed by pressure or tension during weighing
    • G01G3/14—Weighing apparatus characterised by the use of elastically-deformable members, e.g. spring balances wherein the weighing element is in the form of a solid body stressed by pressure or tension during weighing measuring variations of electrical resistance
    • G01G3/142—Circuits specially adapted therefor
    • G01G3/147—Circuits specially adapted therefor involving digital counting

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
  • Feedback Control In General (AREA)

Abstract

1361931 Weighing system SOC D'ETUDES ET DE REALISATIONS D'INSTALLATIONS DE MESURE 13 July 1972 [20 July 1971 23 June 1972] 32871/72 Heading G4H [Also in Divisions H3-H5] In an electric digital weighing system, the voltage produced by a strain gauge bridge is subtracted from a voltage representing the contents of a counter and the difference voltage is amplified and converted into a frequency significant train of pulses which are applied, additively or subtractively, in accordance with the sign of the difference to the counter, whereby the count follows the weight and the difference voltage is reduced to zero. The difference voltage is amplified by amplitude modulating a pulse train with the difference voltage, amplifying the pulses and demodulating. To compensate for non linearities in the strain gauge, means may be provided for providing different correction factors over different weight ranges and end error may be compensated by storing the reading of the scale at zero load and subtracting it from the loaded reading.
GB3287172A 1971-07-20 1972-07-13 Weighing apparatus having strain gauge transducers Expired GB1361931A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7126538A FR2150571B1 (en) 1971-07-20 1971-07-20
FR7222778A FR2189719B2 (en) 1972-06-23 1972-06-23

Publications (1)

Publication Number Publication Date
GB1361931A true GB1361931A (en) 1974-07-30

Family

ID=26216531

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3287172A Expired GB1361931A (en) 1971-07-20 1972-07-13 Weighing apparatus having strain gauge transducers

Country Status (4)

Country Link
BE (1) BE786020A (en)
DE (1) DE2234546B2 (en)
GB (1) GB1361931A (en)
IT (1) IT962965B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2130035A (en) * 1982-07-07 1984-05-23 Micro Consultants Ltd Isolator system for data loggers

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2130035A (en) * 1982-07-07 1984-05-23 Micro Consultants Ltd Isolator system for data loggers

Also Published As

Publication number Publication date
DE2234546B2 (en) 1974-07-25
BE786020A (en) 1972-11-03
IT962965B (en) 1973-12-31
DE2234546A1 (en) 1973-02-01

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee