GB1487670A - Measuring bridge - Google Patents
Measuring bridgeInfo
- 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
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.
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)
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 |
-
1974
- 1974-11-06 DE DE2452529A patent/DE2452529C3/en not_active Expired
-
1975
- 1975-06-11 AT AT446775A patent/AT354555B/en not_active IP Right Cessation
- 1975-06-25 GB GB26973/75A patent/GB1487670A/en not_active Expired
- 1975-11-05 CH CH1433575A patent/CH591086A5/xx not_active IP Right Cessation
-
1976
- 1976-12-27 AT AT0966576A patent/AT366824B/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
ATA966576A (en) | 1981-09-15 |
AT366824B (en) | 1982-05-10 |
DE2452529C3 (en) | 1979-12-13 |
DE2452529B2 (en) | 1977-03-03 |
AT354555B (en) | 1979-01-10 |
DE2452529A1 (en) | 1976-05-13 |
ATA446775A (en) | 1979-06-15 |
CH591086A5 (en) | 1977-09-15 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |