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FR2412830A1 - TEMPERATURE MEASUREMENT METHOD BY MEANS OF A RESISTOR WITH A NEGATIVE TEMPERATURE COEFFICIENT - Google Patents

TEMPERATURE MEASUREMENT METHOD BY MEANS OF A RESISTOR WITH A NEGATIVE TEMPERATURE COEFFICIENT

Info

Publication number
FR2412830A1
FR2412830A1 FR7835818A FR7835818A FR2412830A1 FR 2412830 A1 FR2412830 A1 FR 2412830A1 FR 7835818 A FR7835818 A FR 7835818A FR 7835818 A FR7835818 A FR 7835818A FR 2412830 A1 FR2412830 A1 FR 2412830A1
Authority
FR
France
Prior art keywords
temperature
resistor
negative
duration
coefficient
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.)
Withdrawn
Application number
FR7835818A
Other languages
French (fr)
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.)
Electrolux AB
Original Assignee
Electrolux AB
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 Electrolux AB filed Critical Electrolux AB
Publication of FR2412830A1 publication Critical patent/FR2412830A1/en
Withdrawn legal-status Critical Current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
    • G01K7/22—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 non-linear resistance, e.g. thermistor
    • G01K7/24—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 non-linear resistance, e.g. thermistor in a specially-adapted circuit, e.g. bridge circuit
    • 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
    • G01K7/22—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 non-linear resistance, e.g. thermistor
    • G01K7/24—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 non-linear resistance, e.g. thermistor in a specially-adapted circuit, e.g. bridge circuit
    • G01K7/25—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 non-linear resistance, e.g. thermistor in a specially-adapted circuit, e.g. bridge circuit for modifying the output characteristic, e.g. linearising

Landscapes

  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Temperature Or Quantity Of Heat (AREA)

Abstract

L'INVENTION CONCERNE UN PROCEDE DE MESURE DE TEMPERATURE UTILISANT UNE RESISTANCE A COEFFICIENT DE TEMPERATURE NEGATIF. UN CONDENSATEUR 12 EST CHARGE EN SERIE AVEC LA RESISTANCE 10 A COEFFICIENT DE TEMPERATURE NEGATIF ET UNE RESISTANCE, JUSQU'A CE QUE SA TENSION AUX BORNES ATTEIGNE UNE VALEUR PREDETERMINEE ET IL EST ENSUITE DECHARGE JUSQU'A CE QUE CETTE TENSION ATTEIGNE UNE AUTRE VALEUR PREDETERMINEE. LA TEMPERATURE EST DETERMINEE DIRECTEMENT A PARTIR DU RAPPORT ENTRE LA DUREE DE CHARGE ET LA DUREE DE DECHARGE, CETTE DUREE ETANT MESUREE EN COMPTANT DES IMPULSIONS D'HORLOGE PENDANT PLUSIEURS PERIODES SUCCESSIVES DE CHARGE ET DE DECHARGE. L'INVENTION S'APPLIQUE NOTAMMENT AU REGLAGE DE LA TEMPERATURE DE CUISSON DE PRODUITS ALIMENTAIRES.THE INVENTION RELATES TO A TEMPERATURE MEASUREMENT PROCESS USING A RESISTOR WITH NEGATIVE TEMPERATURE COEFFICIENT. A CAPACITOR 12 IS CHARGED IN SERIES WITH RESISTOR 10 A NEGATIVE COEFFICIENT OF TEMPERATURE AND A RESISTANCE, UNTIL ITS TERMINAL VOLTAGE REACHES A PREDETERMINED VALUE AND IT IS THEN DISCHARGED UNTIL THIS VOLTAGE REACHES ANOTHER . THE TEMPERATURE IS DETERMINED DIRECTLY FROM THE RELATIONSHIP BETWEEN THE CHARGING DURATION AND THE DISCHARGE DURATION, THIS DURATION BEING MEASURED BY ACCOUNTING CLOCK PULSES DURING SEVERAL SUCCESSIVE CHARGING AND DISCHARGING PERIODS. THE INVENTION APPLIES IN PARTICULAR TO THE ADJUSTMENT OF THE COOKING TEMPERATURE OF FOOD PRODUCTS.

FR7835818A 1977-12-22 1978-12-20 TEMPERATURE MEASUREMENT METHOD BY MEANS OF A RESISTOR WITH A NEGATIVE TEMPERATURE COEFFICIENT Withdrawn FR2412830A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE7714645A SE7714645L (en) 1977-12-22 1977-12-22 SET TO META TEMPERATURE

Publications (1)

Publication Number Publication Date
FR2412830A1 true FR2412830A1 (en) 1979-07-20

Family

ID=20333294

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7835818A Withdrawn FR2412830A1 (en) 1977-12-22 1978-12-20 TEMPERATURE MEASUREMENT METHOD BY MEANS OF A RESISTOR WITH A NEGATIVE TEMPERATURE COEFFICIENT

Country Status (4)

Country Link
DE (1) DE2855084A1 (en)
FR (1) FR2412830A1 (en)
GB (1) GB2011095A (en)
SE (1) SE7714645L (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2489509A1 (en) * 1980-08-26 1982-03-05 Elster Ag METHOD AND DEVICE FOR ELECTRICALLY MEASURING QUANTITIES OF HEAT

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3830457A1 (en) * 1988-09-08 1990-03-15 Telefunken Electronic Gmbh TEMPERATURE SENSOR

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3620082A (en) * 1970-03-13 1971-11-16 Us Air Force Digital thermometer
US3875503A (en) * 1972-11-15 1975-04-01 Yokogawa Electric Works Ltd Dual slope type resistance deviation measuring apparatus

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3620082A (en) * 1970-03-13 1971-11-16 Us Air Force Digital thermometer
US3875503A (en) * 1972-11-15 1975-04-01 Yokogawa Electric Works Ltd Dual slope type resistance deviation measuring apparatus

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
EXBK/73 *
EXBK/74 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2489509A1 (en) * 1980-08-26 1982-03-05 Elster Ag METHOD AND DEVICE FOR ELECTRICALLY MEASURING QUANTITIES OF HEAT

Also Published As

Publication number Publication date
DE2855084A1 (en) 1979-07-05
SE7714645L (en) 1979-06-23
GB2011095A (en) 1979-07-04

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Legal Events

Date Code Title Description
ST Notification of lapse