Method and device for detecting hot points in a facility, especially for detecting leaks in air ducts
AssigneeWin Ms
InventorsLaurent Sommervogel, Marc Olivas, Arnaud Peltier
Life of this patent
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Abstract
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.
Claims11
A method for detecting a hot spot in an installation, wherein said method uses at least:
- one line made up of at least two conductors insulated by a material whose insulation impedance depends locally on temperature, said line running through said installation;
- a reflectometer periodically transmitting a reflectometry signal at one end of said line, said signal being propagated along said line, said reflectometer measuring the echoes received and comparing amplitudes of said echoes with a given reference, a reflectometry signal being injected on a second end of said line, the echoes received at this end being measured and compared to at least said given reference;
- a hot spot being detected when the amplitudes of a given number of successive echoes are increasingly greater than said given reference, said echoes being provoked by a reduction of a local value of said insulation impedance.
Dependencies are inferred from the claim text.