METHOD AND DEVICE FOR DETECTING HOT POINTS IN A FACILITY, ESPECIALLY FOR DETECTING LEAKS IN AIR DUCTS

METHOD AND DEVICE FOR DETECTING HOT POINTS IN A FACILITY, ESPECIALLY FOR DETECTING LEAKS IN AIR DUCTS

A method uses at least: one line made up of at least two conductors insulated by a material whose insulation impedance depends locally on the temperature, the line running through the installation; a reflectometer periodically transmitting a reflectometry signal at one end of the line, the signal be...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: SOMMERVOGEL, Laurent, OLIVAS, Marc, PELTIER, Arnaud
Format: Patent
Sprache:eng ; fre ; ger
Schlagworte:
MEASURING
MEASURING QUANTITY OF HEAT
MEASURING TEMPERATURE
PHYSICS
TESTING
THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
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Beschreibung
Zusammenfassung:A method uses at least: one line made up of at least two conductors insulated by a material whose insulation impedance depends locally on the temperature, the line running through the installation; a reflectometer periodically transmitting a reflectometry signal at one end of the line, the signal being propagated along the line, the reflectometer measuring the echoes received and comparing the amplitudes of the echoes with a given reference; a hot spot being detected when the amplitudes of a given number of successive echoes are greater than the given reference, the echoes being provoked by a local reduction of the value of the insulation impedance.