Device for detecting micro-leaks of gas by infrared radiations

Details Device for detecting micro-leaks of gas by infrared radiations Device for detecting micro-leaks of gas by infrared radiations

1988-03-01

1989-06-20

Howell, Janice A.

Radiant energy

Infrared-to-visible imaging

2503381, G01M 338

Patent

active

048411493

ABSTRACT:
The present invention relates to a device for detecting micro-leaks of gas by directing the infrared radiation created by a thermal gradient onto a wall, which device comprises an enclosure provided with an opening equipped with sealing means designed to be placed in contact with the wall, a sealed tank separated from said enclosure by a partition wall, said tank housing an infrared camera of which the objective is situated in front of a lens which is permeable to infrared radiations, means for sealingly applying the enclosure against the wall, means for creating a partial vacuum inside the enclosure, and an insulating screen placed in the center of the opening of the enclosure and applied against said wall in order to filtrate the gas leaks drawn in by the vacuum effect, to obtain a thermal gradient detectable by thermovision.

REFERENCES:
patent: 4204120 (1980-05-01), Riboulet et al.
Patent Abstracts of Japan, vol. 10, No. 64, (P-436)[2121], 14 Mars 1986; & JP-A-60 205 242, (Toshiba K.K.), 10-16-85.

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