GB201200466D0 - Thermocouple fault detection - Google Patents

Thermocouple fault detection

Info

Publication number
GB201200466D0
GB201200466D0 GBGB1200466.9A GB201200466A GB201200466D0 GB 201200466 D0 GB201200466 D0 GB 201200466D0 GB 201200466 A GB201200466 A GB 201200466A GB 201200466 D0 GB201200466 D0 GB 201200466D0
Authority
GB
United Kingdom
Prior art keywords
thermocouple sensor
detector
fault detection
sensor junction
output amplifier
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Withdrawn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
GBGB1200466.9A
Other versions
GB2498370A (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.)
Rolls Royce Controls and Data Services Ltd
Original Assignee
Rolls Royce Goodrich Engine Control Systems 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 Rolls Royce Goodrich Engine Control Systems Ltd filed Critical Rolls Royce Goodrich Engine Control Systems Ltd
Priority to GB1200466.9A priority Critical patent/GB2498370A/en
Publication of GB201200466D0 publication Critical patent/GB201200466D0/en
Publication of GB2498370A publication Critical patent/GB2498370A/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Withdrawn legal-status Critical Current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
    • G01K7/02—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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/28—Testing of electronic circuits, e.g. by signal tracer
    • G01R31/282—Testing of electronic circuits specially adapted for particular applications not provided for elsewhere
    • G01R31/2829—Testing of circuits in sensor or actuator systems

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)

Abstract

A fault detection apparatus comprises a thermocouple sensor junction 10, a differential output amplifier 20 connected to the thermocouple sensor junction to provide an output temperature signal. An alternating voltage source 22 is connected to a first side of the thermocouple sensor junction via a first conductor, and a detector 26 is connected to a second side of the thermocouple sensor junction via a second conductor, wherein each of the first and second conductors is connected to the output amplifier via a low pass filter 16, 18 and the detector is configured to provide a fault indicating output when an AC test signal at the detector is outside of a predetermined range. A plurality of thermocouple sensor junctions may be provided connected to the alternating voltage in parallel and the output amplifier connected via a multiplexer.
GB1200466.9A 2012-01-12 2012-01-12 Thermocouple fault detection Withdrawn GB2498370A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1200466.9A GB2498370A (en) 2012-01-12 2012-01-12 Thermocouple fault detection

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1200466.9A GB2498370A (en) 2012-01-12 2012-01-12 Thermocouple fault detection

Publications (2)

Publication Number Publication Date
GB201200466D0 true GB201200466D0 (en) 2012-02-22
GB2498370A GB2498370A (en) 2013-07-17

Family

ID=45788811

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1200466.9A Withdrawn GB2498370A (en) 2012-01-12 2012-01-12 Thermocouple fault detection

Country Status (1)

Country Link
GB (1) GB2498370A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11047920B2 (en) 2019-04-02 2021-06-29 Hamilton Sunstrand Corporation Sensor to sensor short detection
US11112444B2 (en) 2019-04-02 2021-09-07 Hamilton Sundstrand Corporation Reduced error sensor fault detection
CN113899459B (en) * 2021-10-14 2023-09-05 成都微光集电科技有限公司 Self-detecting current type temperature sensor and temperature detecting equipment

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1283378B (en) * 1966-09-08 1968-11-21 Siemens Ag Circuit arrangement for converting measurement DC voltages into a pulse frequency
US4166243A (en) * 1978-04-21 1979-08-28 General Motors Corporation Thermocouple failure detector
JPS56129870A (en) * 1980-03-14 1981-10-12 Matsushita Electric Ind Co Ltd Burnout apparatus
JPS6095329A (en) * 1983-10-31 1985-05-28 Toshiba Corp Analog input device
JPH0721432B2 (en) * 1986-07-15 1995-03-08 株式会社シンボリ電子 Thermocouple disconnection alarm
JP3217814B2 (en) * 1991-08-09 2001-10-15 日置電機株式会社 Burnout detection circuit of thermocouple thermometer
NL1018226C1 (en) * 2001-06-07 2001-06-25 Asm Int Thermocouple circuit with open circuit detection facility, uses high frequency signals to check continuity, which do not interfere with correct operation of thermocouple

Also Published As

Publication number Publication date
GB2498370A (en) 2013-07-17

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)