G - Physics – 01 – N
Patent
G - Physics
01
N
340/77
G01N 27/26 (2006.01) G01N 33/00 (2006.01)
Patent
CA 2017207
ABSTRACT OF THE DISCLOSURE The invention involves the detection of odors using an odor detector including an n-type semiconductor sensor having an electric resistance responsive to odor molecules adsorbed thereonto. An ozonizer is provided within a test compartment to contact the detector with an ozone gas for the purpose of calibrating the detector to an initial zero setting. The test compartment also includes a ventilation fan operable to draw a purging air into the compatment. In order to minimize the time required to bring the detector to the initial zero setting, a computer is used to selectively actuate the ozonizer and the ventilation fan in a controlled manner. Before starting a new detection cycle, an operator selects a specific table of optimal pattern for quick recovery to the zero setting from among a plurality of tables stored in the computer, based on certain factors such as the identity and concentration of previously detected odorant substances, etc.
Ehara Katuo
Ehara Masahiro
Hara Masataka
Koizumi Takeo
Wakabayashi Yasusuke
Borden Ladner Gervais Llp
Ehara Katuo
Ehara Masahiro
Hara Masataka
Koizumi Takeo
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