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1. (WO1991007713) TRANSDUCER POWER SUPPLY
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1991/007713 International Application No.: PCT/GB1990/001744
Publication Date: 30.05.1991 International Filing Date: 13.11.1990
Chapter 2 Demand Filed: 13.06.1991
IPC:
G01L 1/22 (2006.01) ,G05F 1/46 (2006.01) ,G05F 1/567 (2006.01)
G PHYSICS
01
MEASURING; TESTING
L
MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
1
Measuring force or stress, in general
20
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
22
using resistance strain gauges
G PHYSICS
05
CONTROLLING; REGULATING
F
SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
1
Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
10
Regulating voltage or current
46
wherein the variable actually regulated by the final control device is dc
G PHYSICS
05
CONTROLLING; REGULATING
F
SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
1
Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
10
Regulating voltage or current
46
wherein the variable actually regulated by the final control device is dc
56
using semiconductor devices in series with the load as final control devices
565
sensing a condition of the system or its load in addition to means responsive to deviations in the output of the system, e.g. current, voltage, power factor
567
for temperature compensation
Applicants:
BRITISH TECHNOLOGY GROUP LTD [GB/GB]; 101 Newington Causeway London SE1 6BU, GB (AllExceptUS)
BINNS, John, Philip, Lincoln [GB/GB]; GB (UsOnly)
Inventors:
BINNS, John, Philip, Lincoln; GB
Agent:
GASKIN, John, Shield; Patents Department British Technology Group Ltd 101 Newington Causeway London SE1 6BU, GB
Priority Data:
8925578.013.11.1989GB
9016434.426.07.1990GB
9017573.810.08.1990GB
Title (EN) TRANSDUCER POWER SUPPLY
(FR) ALIMENTATION DE TRANSDUCTEUR
Abstract:
(EN) The invention provides a power supply circuit for applying a temperature-compensating supply voltage across a temperature-sensitive transducer (such as a strain gauge transducer), the circuit comprising a first operational amplifier, means for applying an output level determining voltage to one (preferably the negative) input of the amplifier, means for applying a temperature-dependent output slope determining voltage to the other (preferably the positive) input of the amplifier, and means for applying the resultant temperature-dependent output voltage of the amplifier to the transducer.
(FR) Circuit d'alimentation permettant d'appliquer une tension d'alimentation à compensation de température à un transducteur sensible à la température (tel qu'un transducteur de jauge de contrainte), le circuit comprenant un premier amplificateur opérationnel, un moyen d'application d'une tension de détermination d'un niveau de sortie à une entrée (de préférence négative) de l'amplificateur, un moyen d'application d'une tension de détermination d'une pente de sortie dépendant de la température à l'autre entrée (de préférence positive) de l'amplificateur, ainsi qu'un moyen d'application de la tension de sortie obtenue dépendant de la température de l'amplificateur au transducteur.
Designated States: JP, US
European Patent Office (AT, BE, CH, DE, DK, ES, FR, GB, GR, IT, LU, NL, SE)
Publication Language: English (EN)
Filing Language: English (EN)
Also published as:
EP0500631JPH05505894