JPS57208425A - Device for measuring temperature of heat generating resistor - Google Patents
Device for measuring temperature of heat generating resistorInfo
- Publication number
- JPS57208425A JPS57208425A JP9376281A JP9376281A JPS57208425A JP S57208425 A JPS57208425 A JP S57208425A JP 9376281 A JP9376281 A JP 9376281A JP 9376281 A JP9376281 A JP 9376281A JP S57208425 A JPS57208425 A JP S57208425A
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- resistor
- heat generating
- terminal
- generating resistor
- 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.)
- Pending
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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Temperature Or Quantity Of Heat (AREA)
Abstract
PURPOSE:To make it possible to read the output as a temperature regardless of the presence or absence of the mounted heat sensitive paper, by measuring the variation in the resistance value of the heat generating resistor due to the rise and fall of the temperature and measuing the temperature of the heat generating resistor from the temperature resistance coefficient. CONSTITUTION:A bridge circuit which includes the heat generating resistor 4 is adjusted so that it is balanced at a room temperature. When a pulse voltage V1 is applied to said bridge circuit from a terminal 1, the resistor 4 is heated. At this time, the temperature T of the resistor 4 is proportional to V2/V1.A1.alpha, where A1 is the gain of a differential amplifier 10, alpha is the temperature resistance coefficient of the resistor 4, and V2 is an output voltage of a terminal 3. The temperature of the resistor 4 during a cooling period after the current conduction and heating can be found from the same proportional constant, by applying a minute current to the terminal 1, and varying the gain of the differential amplifier 10 by IC switches 9, with the temperature variation in the resistor 4 being proportional to the output voltage. Therefore, by using the temperature resistance coefficient of the heat generating body, the temperature can be directly read from the output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9376281A JPS57208425A (en) | 1981-06-19 | 1981-06-19 | Device for measuring temperature of heat generating resistor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9376281A JPS57208425A (en) | 1981-06-19 | 1981-06-19 | Device for measuring temperature of heat generating resistor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS57208425A true JPS57208425A (en) | 1982-12-21 |
Family
ID=14091439
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9376281A Pending JPS57208425A (en) | 1981-06-19 | 1981-06-19 | Device for measuring temperature of heat generating resistor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57208425A (en) |
-
1981
- 1981-06-19 JP JP9376281A patent/JPS57208425A/en active Pending
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