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Patent Searching and Data


Title:
ENVIRONMENTAL CHANGE IDENTIFICATION DEVICE
Document Type and Number:
WIPO Patent Application WO/2014/207881
Kind Code:
A1
Abstract:
The purpose of the present invention is to make it possible to estimate the position of the occurrence of a change in an object that does not make sound and is hidden behind another object. The present invention is characterized by the estimation of the position of the occurrence of an environmental change on the basis of the difference in the propagation characteristics of sound that is emitted from a speaker and collected by a microphone element at a first time and a second time.

Inventors:
TOGAMI MASAHITO (JP)
Application Number:
PCT/JP2013/067760
Publication Date:
December 31, 2014
Filing Date:
June 28, 2013
Export Citation:
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Assignee:
HITACHI LTD (JP)
International Classes:
G01S5/22; G01S15/06; G08B13/16; G08B25/00
Foreign References:
JPH07146366A1995-06-06
JP2011215829A2011-10-27
JP2011182235A2011-09-15
JPH07146988A1995-06-06
JPH11331833A1999-11-30
Attorney, Agent or Firm:
INOUE, Manabu et al. (JP)
Manabu Inoue (JP)
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