GB1487670A - Measuring bridge - Google Patents

Measuring bridge

Info

Publication number
GB1487670A
GB1487670A GB26973/75A GB2697375A GB1487670A GB 1487670 A GB1487670 A GB 1487670A GB 26973/75 A GB26973/75 A GB 26973/75A GB 2697375 A GB2697375 A GB 2697375A GB 1487670 A GB1487670 A GB 1487670A
Authority
GB
United Kingdom
Prior art keywords
bridge
resistor
potentiometer
current
thermistor
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
GB26973/75A
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.)
SATCHWELL BIRKA REGELUNGSTECH
Original Assignee
SATCHWELL BIRKA REGELUNGSTECH
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 SATCHWELL BIRKA REGELUNGSTECH filed Critical SATCHWELL BIRKA REGELUNGSTECH
Publication of GB1487670A publication Critical patent/GB1487670A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
    • G01K7/16—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements
    • G01K7/18—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements the element being a linear resistance, e.g. platinum resistance thermometer
    • G01K7/20—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements the element being a linear resistance, e.g. platinum resistance thermometer in a specially-adapted circuit, e.g. bridge circuit
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D3/00—Indicating or recording apparatus with provision for the special purposes referred to in the subgroups
    • G01D3/02—Indicating or recording apparatus with provision for the special purposes referred to in the subgroups with provision for altering or correcting the law of variation
    • G01D3/021—Indicating or recording apparatus with provision for the special purposes referred to in the subgroups with provision for altering or correcting the law of variation using purely analogue techniques
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R17/00—Measuring arrangements involving comparison with a reference value, e.g. bridge
    • G01R17/10—AC or DC measuring bridges
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D23/00—Control of temperature
    • G05D23/19—Control of temperature characterised by the use of electric means
    • G05D23/1906—Control of temperature characterised by the use of electric means using an analogue comparing device
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D23/00—Control of temperature
    • G05D23/19—Control of temperature characterised by the use of electric means
    • G05D23/20—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
    • G05D23/24—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature the sensing element having a resistance varying with temperature, e.g. a thermistor

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Technology Law (AREA)
  • Indication And Recording Devices For Special Purposes And Tariff Metering Devices (AREA)
  • Investigating Or Analyzing Materials Using Thermal Means (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)

Abstract

1487670 Bridge "SATCHWELL-BIRKA" REGELUNGSTECHNIK GmbH 25 June 1975 [6 Nov 1974] 26973/75 Heading G1U A bridge consisting essentially of a variable resistor 3, Fig. 1, e.g. a thermistor, to be measured, a second resistor 4, and two potentiometers 20, 22, is characterized in that the supply voltage across the bridge is automatically controlled 27 so that the potential difference between the two potentiometer taps is maintained constant equal to the potential across a resistor 38 when a constant current is drawn through it by a current sink 28. The diagonal output voltage from the bridge is converted to a proportional current i through a resistor 9 by isolating amplifiers 6, 17 and a transistor 7. The arrangement is such that when the resistor 3 is a thermistor the relationship between its temperature t and the resulting current i is substantially a straight line extending between a lower point set by potentiometer 22 and an upper point set by potentiometer 20. Typical possible characteristics are shown Fig. 2 (not shown), and by using slider potentiometers the two slider knobs can be arranged against a calibrated scale to indicate the two end points of the characteristic. The bridge is for use with a night storage heater or a hot water system.
GB26973/75A 1974-11-06 1975-06-25 Measuring bridge Expired GB1487670A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2452529A DE2452529C3 (en) 1974-11-06 1974-11-06 Device for the independent setting of the start and end values of an electrical measuring range with a bridge circuit

Publications (1)

Publication Number Publication Date
GB1487670A true GB1487670A (en) 1977-10-05

Family

ID=5930107

Family Applications (1)

Application Number Title Priority Date Filing Date
GB26973/75A Expired GB1487670A (en) 1974-11-06 1975-06-25 Measuring bridge

Country Status (4)

Country Link
AT (2) AT354555B (en)
CH (1) CH591086A5 (en)
DE (1) DE2452529C3 (en)
GB (1) GB1487670A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2901276A1 (en) 1979-01-13 1980-07-24 Dokoupil Jiri Industrial iron - has a thermostat sepd. from the iron and linked to a sensor
DE3524886A1 (en) * 1985-07-12 1987-01-22 Vdo Schindling MEASURING CIRCUIT ARRANGEMENT FOR AN ELECTRICAL PROCESSOR

Also Published As

Publication number Publication date
ATA966576A (en) 1981-09-15
DE2452529A1 (en) 1976-05-13
ATA446775A (en) 1979-06-15
DE2452529B2 (en) 1977-03-03
AT366824B (en) 1982-05-10
CH591086A5 (en) 1977-09-15
DE2452529C3 (en) 1979-12-13
AT354555B (en) 1979-01-10

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Legal Events

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