Title:
PRESSURE SENSOR AND DOOR OPENING/CLOSURE MONITORING SYSTEM
Document Type and Number:
WIPO Patent Application WO/1999/060359
Kind Code:
A1
Abstract:
A pressure sensor (10) has a sensor chip (14) in a package (13) structured by joining the open side of a stem (11) to the open side of a cap (12). Exerted on both side of a diaphragm (14a) of the sensor chip are pressures transmitted through a measurement pressure introducing pipe (11a) provided to the stem and a reference pressure introducing pipe (12a) provided to the cap. In the reference pressure introducing pipe, a filter (15) is provided to retard the pressure response on the reference pressure side. This sensor is installed in a room with a door, and the room pressure is supplied through the pipes. When the door is opened or closed, a sudden pressure change is produced. Such a sudden pressure change is instantly transmitted only through the pipe which has a quick pressure response, and a differential pressure corresponding to the pressure change is exerted on the diaphragm. Since the differential pressure is thus used, it is possible to distinguish the opening of the door from the closure.
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Inventors:
Horibe, Koji (Omron Corporation 10, Tsuchido-cho Hanazono Ukyo-ku, Kyoto-shi Kyoto, 616-8025, JP)
Sasaki, Sho (Omron Corporation 10, Tsuchido-cho Hanazono Ukyo-ku, Kyoto-shi Kyoto, 616-8025, JP)
Sasaki, Sho (Omron Corporation 10, Tsuchido-cho Hanazono Ukyo-ku, Kyoto-shi Kyoto, 616-8025, JP)
Application Number:
PCT/JP1999/002484
Publication Date:
November 25, 1999
Filing Date:
May 13, 1999
Export Citation:
Assignee:
OMRON CORPORATION (10 Tsuchido-cho Hanazono Ukyo-ku Kyoto-shi Kyoto, 616-8025, JP)
Horibe, Koji (Omron Corporation 10, Tsuchido-cho Hanazono Ukyo-ku, Kyoto-shi Kyoto, 616-8025, JP)
Sasaki, Sho (Omron Corporation 10, Tsuchido-cho Hanazono Ukyo-ku, Kyoto-shi Kyoto, 616-8025, JP)
Horibe, Koji (Omron Corporation 10, Tsuchido-cho Hanazono Ukyo-ku, Kyoto-shi Kyoto, 616-8025, JP)
Sasaki, Sho (Omron Corporation 10, Tsuchido-cho Hanazono Ukyo-ku, Kyoto-shi Kyoto, 616-8025, JP)
International Classes:
G01L13/00; G01L9/00; G01L19/12; G08B13/08; (IPC1-7): G01L13/00; G08B13/20; E05F15/20
Attorney, Agent or Firm:
Fukami, Hisao (Sumitomo Bank Minamimori-machi Building 1-29, Minamimori-machi 2-chome Kita-ku, Osaka-shi Osaka, 530-0054, JP)
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