Title:
【発明の名称】におい濃度の測定方法及び装置
Document Type and Number:
Japanese Patent JP2542259
Kind Code:
B2
Abstract:
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.
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Inventors:
WAKABAYASHI YASUSUKE
KOIZUMI TAKEO
EBARA KATSUO
HARA MASATAKA
EBARA MASAHIRO
KOIZUMI TAKEO
EBARA KATSUO
HARA MASATAKA
EBARA MASAHIRO
Application Number:
JP12769489A
Publication Date:
October 09, 1996
Filing Date:
May 19, 1989
Export Citation:
Assignee:
WAKABAYASHI SHOTEN KK
International Classes:
G01N27/12; G01N27/04; G01N33/00; (IPC1-7): G01N27/12; G01N27/04
Domestic Patent References:
| JP2208548A | ||||
| JP1131444A |
Attorney, Agent or Firm:
Katsuhiko Kajiwara