FR2268258A1 - Temperature measuring device - has thermocouple which is used as sensor, followed by differential amplifier and signal processor - Google Patents

Temperature measuring device - has thermocouple which is used as sensor, followed by differential amplifier and signal processor

Info

Publication number
FR2268258A1
FR2268258A1 FR7512077A FR7512077A FR2268258A1 FR 2268258 A1 FR2268258 A1 FR 2268258A1 FR 7512077 A FR7512077 A FR 7512077A FR 7512077 A FR7512077 A FR 7512077A FR 2268258 A1 FR2268258 A1 FR 2268258A1
Authority
FR
France
Prior art keywords
thermocouple
differential amplifier
followed
sensor
measuring device
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.)
Granted
Application number
FR7512077A
Other languages
French (fr)
Other versions
FR2268258B3 (en
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.)
Mannesmann VDO AG
Original Assignee
Mannesmann VDO AG
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 Mannesmann VDO AG filed Critical Mannesmann VDO AG
Publication of FR2268258A1 publication Critical patent/FR2268258A1/en
Application granted granted Critical
Publication of FR2268258B3 publication Critical patent/FR2268258B3/fr
Granted 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
    • G01K7/02—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using thermoelectric elements, e.g. thermocouples
    • G01K7/026—Arrangements for signalling failure or disconnection of thermocouples

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Temperature Or Quantity Of Heat (AREA)
  • Investigating Or Analyzing Materials Using Thermal Means (AREA)

Abstract

The apparatus may be used in motor vehicles which have catalytic exhaust gas afterburners, and it includes a signal processing stage which is connected to the amplifier output and it contains at least one threshold device which is used for tripping an alarm. The differential amplifier input connected to the thermocouple is connected through at least one resistor to a voltage whose value and polarity are such that if the thermocouple circuit is broken, the amplitude of the amplifier output signal exceeds the normal range and operates the threshold switch; the resistance of the resistor lies between 100 KOhm and 10 MOhm.
FR7512077A 1974-04-20 1975-04-18 Temperature measuring device - has thermocouple which is used as sensor, followed by differential amplifier and signal processor Granted FR2268258A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19742419149 DE2419149A1 (en) 1974-04-20 1974-04-20 TEMPERATURE MEASURING DEVICE

Publications (2)

Publication Number Publication Date
FR2268258A1 true FR2268258A1 (en) 1975-11-14
FR2268258B3 FR2268258B3 (en) 1978-10-06

Family

ID=5913457

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7512077A Granted FR2268258A1 (en) 1974-04-20 1975-04-18 Temperature measuring device - has thermocouple which is used as sensor, followed by differential amplifier and signal processor

Country Status (2)

Country Link
DE (1) DE2419149A1 (en)
FR (1) FR2268258A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002095894A2 (en) * 2001-05-04 2002-11-28 Di Matteo, Vincenzo Device for detecting temperature variations in a dc power supply installation

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2112928B (en) * 1981-12-30 1985-07-24 Rolls Royce Sensing surges in gas turbines

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002095894A2 (en) * 2001-05-04 2002-11-28 Di Matteo, Vincenzo Device for detecting temperature variations in a dc power supply installation
WO2002095894A3 (en) * 2001-05-04 2003-01-16 Maddalo Pezzulla Device for detecting temperature variations in a dc power supply installation

Also Published As

Publication number Publication date
DE2419149A1 (en) 1975-11-06
FR2268258B3 (en) 1978-10-06

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