Agence Nationale De Valorisation De La Recherche

Agence Nationale De Valorisation De La Recherche (anvar)

Captec

Pierre Thery

Guy Ravalitera

Michel Cornet

Florian Raucoules

Philippe Herin

Didier Leclercq

The invention relates to a heat flux comparator comprising two substantially planar and mutually parallel input faces, capable of receiving each a heat flux, and comprising a thermoelectric circuit including at least a strip of a first metallic material partly covered on one of its surfaces with first separate metal pads of a second metallic material. The heat flux comparator also comprises layers of an insulating material arranged on either side of the thermoelectric circuit, second and third pads arranged on respective faces of the two layers of insulating material which are directed away from the thermoelectric circuit. The second and third pads are made of a same material and have substantially a same thickness, and the layers of insulating material have a same thickness too.

Heat flux comparator

A device is provided for measuring the intensity of a radiative flux and optionally also a convective flux, including a thin support made from an insulating material; a thin continuous strip of meandering shape made from a first conducting material; a series of discontinuous deposits made from a second conducting material having a thermoelectric power different from that of the first material and a high electric conductivity, the whole of the deposits and of the associated underlying strip portion forming an elementary thermocouple and having, in the transverse direction with respect to the direction of extension of the strip, a width which varies between its two ends, the variation in width being in the same direction for the successive deposits along the strip; and a coating with high emissivity intimately covering at least the successive deposits. The device may also include a heat conducting layer.

Device for measuring the intensity of a radiative flux and optionally

Thermal fluxmeter with a plurality of thermocouples comprising a continuous thin layer of a first conductor or semiconductor material such as constantan, covered on at least one of its faces by a succession of areas comprised of very thin deposits of a second conductor or semiconductor material such as copper, having a thermoelectric power different from that of the first material; the characteristic of the invention is that at least one channel traverses from side to side through each deposit area and through the underlying thin layer, said channels being offset in the same direction with respect to the center of the traversed area; said channels may be provided with an inner coating of a deposit of the second material; appropriately, the thin layer is deposited on a substrate of insulating material.

Thermocouple array for a thermal fluxmeter

The invention relates to a device sensitive to a temperature gradient or to a heat flow comprising at least one elementary cell formed by a thin layer made from a first electric conductor or semiconductor, such as constantan, coated with a very thin electrolytic layer of a second electric conductor or semiconductor, such as copper. It has been discovered that induced electric currents flow through the surface separating the conductors, the electric voltages observed in each of the conducting or semiconducting layers being proportional to the instantaneous spatial mean of the surface thermal gradient. The invention also relates to the application of such cells for measuring temperature gradients and heat flows and for converting heat energy into electric energy.

Growing community of inventors

Villeneuve d'Ascq, France

Pierre Thery