Title:
POSITIONING SYSTEM
Document Type and Number:
Japanese Patent JP2018165623
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a positioning system capable of accurately measuring a position of a receiver by using an acoustic signal transmitted from a plurality of transmitters.SOLUTION: The positioning system includes: a plurality of transmitters 3; and a receiver 4. A first acoustic signal and a second acoustic signal of a predetermined strength or higher received by the receiver 4 are detected as a first received signal and a second received signal, respectively. An installation position of the transmitter 3 corresponding to a frequency of the first received signal and a time difference between the first received signal and the second received signal is identified and a position of the receiver 4 is measured from the installation position. Here, at least transmitters 3 to which the same frequency band is allocated among the transmitters 3 are positioned by being separated from each other by a distance at which the first received signals from the two or more transmitters 3 to which the frequency bands are allocated from the first acoustic signals of the frequency band received by the receiver 4 at an arbitrary position in the monitoring space are not detected.SELECTED DRAWING: Figure 1
Inventors:
FUKUSHI KAZUYOSHI
Application Number:
JP2017062121A
Publication Date:
October 25, 2018
Filing Date:
March 28, 2017
Export Citation:
Assignee:
SECOM CO LTD
International Classes:
G01S1/80; G01S5/26
Domestic Patent References:
| JP2013106278A | 2013-05-30 | |||
| JP2007047129A | 2007-02-22 | |||
| JP2001337157A | 2001-12-07 | |||
| JP2009288245A | 2009-12-10 | |||
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| JPS6238379A | 1987-02-19 | |||
| JPH07234279A | 1995-09-05 | |||
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| JP2004340881A | 2004-12-02 |
Foreign References:
| WO2014102931A1 | 2014-07-03 | |||
| WO2013108243A1 | 2013-07-25 |
Attorney, Agent or Firm:
Patent Corporation yki International Patent Office