GB1425013A - Method of measuring the temperature of metal - Google Patents

Method of measuring the temperature of metal

Info

Publication number
GB1425013A
GB1425013A GB3311872A GB3311872A GB1425013A GB 1425013 A GB1425013 A GB 1425013A GB 3311872 A GB3311872 A GB 3311872A GB 3311872 A GB3311872 A GB 3311872A GB 1425013 A GB1425013 A GB 1425013A
Authority
GB
United Kingdom
Prior art keywords
eddy currents
temperature
coil
volt
july
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.)
Expired
Application number
GB3311872A
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.)
British Steel Corp
Original Assignee
British Steel Corp
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 British Steel Corp filed Critical British Steel Corp
Priority to GB3311872A priority Critical patent/GB1425013A/en
Publication of GB1425013A publication Critical patent/GB1425013A/en
Expired 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
    • G01K7/36—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using magnetic elements, e.g. magnets, coils

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)

Abstract

1425013 Electro-physical measurement-temperature BRITISH STEEL CORP 12 July 1973 [14 July 1972] 33118/72 Heading G1N The invention relates to the electromagnetic measurement of the temperature of hot metal, e.g. in a rolling mill by variation of its resistance to eddy currents. A sudden change is made in a unidirectional magnetic field and the rate of decay of the resulting eddy currents is sensed to estimate the resistance. DETECTING EDDY CURRENTS. As shown a field coil 16 for "magnetizing" the sample is pulse energized through a transistor switch 22 controlled by a squarewave oscillator 26. The eddy currents are sensed by the voltage induced in the coil during the "power off" periods. Any noise signals are also picked up in an adjacent coil 18 and subtracted from the induced voltage signal from coil 16 in a differential amplifier 28. MEASURING DECAY RATE. Clockpulses are counted while the signal decays past two thresholds. As shown the induced voltage is applied to two level detectors L1, L2, set for e.g. 5 volts and 1 volt. The output from L1 is inverted so that triple-coincidence-gate 40 is opened to energize the counter when the level drops below 5 volts until it reaches 1 volt. The enabling pulse for gate 40 is delayed slightly at 44, to avoid initial transients. The counter is reset every 100 and drives a 7 decade display which may be arranged to read directly in temperature e.g. by adjusting the threshold levels.
GB3311872A 1972-07-14 1972-07-14 Method of measuring the temperature of metal Expired GB1425013A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3311872A GB1425013A (en) 1972-07-14 1972-07-14 Method of measuring the temperature of metal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3311872A GB1425013A (en) 1972-07-14 1972-07-14 Method of measuring the temperature of metal

Publications (1)

Publication Number Publication Date
GB1425013A true GB1425013A (en) 1976-02-18

Family

ID=10348799

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3311872A Expired GB1425013A (en) 1972-07-14 1972-07-14 Method of measuring the temperature of metal

Country Status (1)

Country Link
GB (1) GB1425013A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2589566A1 (en) * 1985-11-06 1987-05-07 Cegedur METHOD FOR NON-CONTACT SCALE MEASUREMENT OF THE THICKNESS AND TEMPERATURE OF THIN METAL SHEETS USING FOUCAULT CURRENTS
WO1991012503A1 (en) * 1988-08-24 1991-08-22 Valtion Teknillinen Tutkimuskeskus Method and apparatus for measuring the temperature of an electrically conductive material
EP1659396A2 (en) * 2004-11-12 2006-05-24 MTU Aero Engines GmbH Method for detecting faults in metallic parts
WO2011049846A2 (en) 2009-10-19 2011-04-28 Tsi Technologies Llc Eddy current thermometer

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2589566A1 (en) * 1985-11-06 1987-05-07 Cegedur METHOD FOR NON-CONTACT SCALE MEASUREMENT OF THE THICKNESS AND TEMPERATURE OF THIN METAL SHEETS USING FOUCAULT CURRENTS
WO1991012503A1 (en) * 1988-08-24 1991-08-22 Valtion Teknillinen Tutkimuskeskus Method and apparatus for measuring the temperature of an electrically conductive material
US5354130A (en) * 1988-08-24 1994-10-11 Valtion Teknillinen Tutkimuskeskus Method and apparatus for measuring the temperature of an electrically conductive material
EP1659396A2 (en) * 2004-11-12 2006-05-24 MTU Aero Engines GmbH Method for detecting faults in metallic parts
EP1659396A3 (en) * 2004-11-12 2007-05-09 MTU Aero Engines GmbH Method for detecting faults in metallic parts
WO2011049846A2 (en) 2009-10-19 2011-04-28 Tsi Technologies Llc Eddy current thermometer
EP2491360A4 (en) * 2009-10-19 2016-01-20 Tsi Technologies Llc Eddy current thermometer

Similar Documents

Publication Publication Date Title
US5578763A (en) Electromagnetic flow meter
GB1319586A (en) Displacement transducers
GB1023067A (en) Calipering device for determining internal surface dimensions of ferromagnetic tubular structures
GB1249274A (en) Magnetically determining mechanical properties of moving ferro-magnetic materials
GB1335963A (en) Detection of electrostatic charge in flowing materials
GB1425013A (en) Method of measuring the temperature of metal
GB1476773A (en) Method of and apparatus for detecting flaws in metallic rods
GB1219480A (en) Method and device for detecting the presence of electrically conductive bodies
US3430221A (en) Proximity detector
KR830005633A (en) How to monitor nuclear fuel material magnetically
ES372698A1 (en) Signal readout method and apparatus
GB1345712A (en) Device and method for measuring earth resistance
GB1160124A (en) Apparatus and Method of Detecting Stress in Strip Material
ATE15553T1 (en) METHOD AND ARRANGEMENT FOR DETERMINING A MAGNETIC FIELD.
JPS5753604A (en) Thickness gauge
GB1270821A (en) Ferromagnetic metal detector
GB1132364A (en) Improvements relating to the contactless measurement of the speed of strip
SU441512A1 (en) Contactless electrodynamic sensor
SE7404978L (en) DETECTOR DEVICE.
GB2153077A (en) Metal detecting apparatus
US3803498A (en) Voltage detection circuit
CN2274105Y (en) Vortex-type molten-steel level detecting-controlling device
SU127066A1 (en) The way to control the macrostructure of cast non-magnetic austenitic steel
SU1096564A1 (en) Method of checking of moving lengthy ferromagnetic objects
GB1283357A (en) Improvements in or relating to measurement of length magnetically

Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees