Test device for performing leak detection at a plurality of test sites

The leak detection device comprises a plurality of measuring cells (10) in whose interior the absorption of a laser beam (17) is influenced by the presence of tracer gas. All of said measuring cells (10) are connected to a host unit (25) via light-conducting fibers (28,34). In the host unit (25), a...

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Bibliographic Details
Main Authors CHERNOBROD BORIS, SCHWARTZ VLADIMIR
Format Patent
LanguageEnglish
Published 11.11.2014
Subjects
MEASURING
PHYSICS
TESTING
TESTING STATIC OR DYNAMIC BALANCE OF MACHINES ORSTRUCTURES
TESTING STRUCTURES OR APPARATUS NOT OTHERWISE PROVIDED FOR
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Summary:The leak detection device comprises a plurality of measuring cells (10) in whose interior the absorption of a laser beam (17) is influenced by the presence of tracer gas. All of said measuring cells (10) are connected to a host unit (25) via light-conducting fibers (28,34). In the host unit (25), a laser (26) designed for modulation and a photodetector (37) are arranged. Modulation of the laser radiation is preferably performed by two-tone frequency modulation. This has the effect that the fiber length cannot significantly skew the result of the measurement.
Bibliography:Application Number: US20100757651