JPS57208428A - Temperature detecting device - Google Patents

Temperature detecting device

Info

Publication number
JPS57208428A
JPS57208428A JP9503681A JP9503681A JPS57208428A JP S57208428 A JPS57208428 A JP S57208428A JP 9503681 A JP9503681 A JP 9503681A JP 9503681 A JP9503681 A JP 9503681A JP S57208428 A JPS57208428 A JP S57208428A
Authority
JP
Japan
Prior art keywords
thermistor
circuit
detecting
resistor
temperature detecting
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
Application number
JP9503681A
Other languages
Japanese (ja)
Inventor
Yoshio Ogino
Yuichi Yoshida
Takao Kobayashi
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP9503681A priority Critical patent/JPS57208428A/en
Publication of JPS57208428A publication Critical patent/JPS57208428A/en
Pending 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
    • 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

Landscapes

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

Abstract

PURPOSE:To impart the highly accurate wire breakage detecting function to a temperature detecting circuit wherein a thermistor is used by a simple circuit, by providing a means for detecting the polarity of the terminal voltage of a resistor which is connected to the thermistor in a bridge in series. CONSTITUTION:A first detecting means 7, which detects the variation in resistance value of the thermistor 1, is provided in the bridge circuit whose one side is the thermistor 1. Bias resistors 6 and 8 are provided between both ends of the resistor 2 which is connected to the thermistor 1 and a power source 5. In this temperature detecting circuit, a second detecting means 9, which detects the polarity of the terminal voltage of the resistor 2, is provided. For example, the circuit as shown by the Figure, wherein an open collector type comparator is used as the detecting means 7 and 9, is used. When the output of the comparator is ''L'', it is regarded that the temperature is higher than the upper limit, or the thermistor wire 1 might be broken, and heating is not performed.
JP9503681A 1981-06-18 1981-06-18 Temperature detecting device Pending JPS57208428A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9503681A JPS57208428A (en) 1981-06-18 1981-06-18 Temperature detecting device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9503681A JPS57208428A (en) 1981-06-18 1981-06-18 Temperature detecting device

Publications (1)

Publication Number Publication Date
JPS57208428A true JPS57208428A (en) 1982-12-21

Family

ID=14126849

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9503681A Pending JPS57208428A (en) 1981-06-18 1981-06-18 Temperature detecting device

Country Status (1)

Country Link
JP (1) JPS57208428A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62147910A (en) * 1985-12-23 1987-07-01 松下電工株式会社 Circuit abnormality detector
JPH01166289A (en) * 1987-12-23 1989-06-30 Matsushita Electric Works Ltd Semiconductor type heat sensor
JPH02136613A (en) * 1988-11-18 1990-05-25 Matsushita Electric Ind Co Ltd Gas table
JPH04357067A (en) * 1991-03-08 1992-12-10 Tokyo Electric Co Ltd Temperature monitor of printer
JPH05196511A (en) * 1992-01-21 1993-08-06 Tamura Seisakusho Co Ltd Temperature window circuit
US6582119B2 (en) * 2000-03-13 2003-06-24 Toyoda Koki Kabushiki Kaisha Wire breaking detection method for temperature sensor and temperature sensing apparatus for using the method

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62147910A (en) * 1985-12-23 1987-07-01 松下電工株式会社 Circuit abnormality detector
JPH01166289A (en) * 1987-12-23 1989-06-30 Matsushita Electric Works Ltd Semiconductor type heat sensor
JPH02136613A (en) * 1988-11-18 1990-05-25 Matsushita Electric Ind Co Ltd Gas table
JPH04357067A (en) * 1991-03-08 1992-12-10 Tokyo Electric Co Ltd Temperature monitor of printer
JPH05196511A (en) * 1992-01-21 1993-08-06 Tamura Seisakusho Co Ltd Temperature window circuit
US6582119B2 (en) * 2000-03-13 2003-06-24 Toyoda Koki Kabushiki Kaisha Wire breaking detection method for temperature sensor and temperature sensing apparatus for using the method

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