Title:
PRESENCE DETECTION SYSTEM, PRESENCE DETECTION METHOD, AND PROGRAM
Document Type and Number:
WIPO Patent Application WO/2012/137285
Kind Code:
A1
Abstract:
A presence detection system is equipped with a transmitter that transmits a multipath wireless signal and a receiver that detects the presence of a person by receiving the transmitted wireless signal, within a prescribed space. On the basis of the reception level for a wireless signal received intermittently in a first interval, the receiver determines whether there has been a change in the present/absent state of a person (step S102). When it is determined that there has been a change in the present/absent state of a person, the receiver determines whether a person is present/absent on the basis of variation in the reception level for a wireless signal received in a second interval, which is shorter than the first interval (step S108).
Inventors:
ISHIHARA MASAHIRO (JP)
KOIZUMI YOSHIAKI (JP)
KOIZUMI YOSHIAKI (JP)
Application Number:
PCT/JP2011/058528
Publication Date:
October 11, 2012
Filing Date:
April 04, 2011
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
ISHIHARA MASAHIRO (JP)
KOIZUMI YOSHIAKI (JP)
ISHIHARA MASAHIRO (JP)
KOIZUMI YOSHIAKI (JP)
International Classes:
G08B21/04; G08B21/22
Foreign References:
| JP2006221213A | 2006-08-24 | |||
| JPH0879840A | 1996-03-22 | |||
| JPH1020925A | 1998-01-23 | |||
| JP2003230174A | 2003-08-15 | |||
| JP2006221213A | 2006-08-24 |
Other References:
See also references of EP 2696332A4
Attorney, Agent or Firm:
KIMURA MITSURU (JP)
Mitsuru Kimura (JP)
Mitsuru Kimura (JP)
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Claims:
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