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 COEFFICIENTInfo
- 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- Withdrawn
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
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.
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)
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3830457A1 (en) * | 1988-09-08 | 1990-03-15 | Telefunken Electronic Gmbh | TEMPERATURE SENSOR |
Citations (2)
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 |
-
1977
- 1977-12-22 SE SE7714645A patent/SE7714645L/en unknown
-
1978
- 1978-12-15 GB GB7848664A patent/GB2011095A/en not_active Withdrawn
- 1978-12-20 FR FR7835818A patent/FR2412830A1/en not_active Withdrawn
- 1978-12-20 DE DE19782855084 patent/DE2855084A1/en active Pending
Patent Citations (2)
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)
Title |
---|
EXBK/73 * |
EXBK/74 * |
Cited By (1)
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 |