Title:
CONGESTION SIGN DETECTION METHOD, PROGRAM, AND CONGESTION SIGN DETECTION DEVICE
Document Type and Number:
WIPO Patent Application WO/2014/136949
Kind Code:
A1
Abstract:
A congestion sign detection method is implemented by a congestion sing detection device (10) provided with a three-dimensional acceleration sensor (14) which acquires information relating to accelerations in X-axis, Y-axis, and Z-axis directions that form an orthogonal coordinate system of a three-dimensional space, and comprises: an input data calculation step for calculating an acceleration vector using the information relating to the accelerations acquired by the three-dimensional acceleration sensor (14), and calculates, as input data, a norm of a difference in the vector at two different timings; a frequency analysis step for calculating an autocorrelation of the input data, and calculating a power spectrum by performing Fourier transformation on the autocorrelation; an angular information acquisition step for converting the power spectrum into information relating to an angle; and a congestion sign detection step for detecting a congestion sign according to the information relating to the angle.
More Like This:
Inventors:
KOSHIZEN TAKAMASA (JP)
Application Number:
PCT/JP2014/056012
Publication Date:
September 12, 2014
Filing Date:
March 07, 2014
Export Citation:
Assignee:
HONDA MOTOR CO LTD (JP)
International Classes:
G08G1/00; B60W40/04; G08G1/01; G08G1/13
Foreign References:
JP2010286344A | 2010-12-24 | |||
JP2008040825A | 2008-02-21 | |||
JP2002190090A | 2002-07-05 | |||
JP2009262862A | 2009-11-12 |
Attorney, Agent or Firm:
SHIGA Masatake et al. (JP)
Masatake Shiga (JP)
Masatake Shiga (JP)
Download PDF:
Previous Patent: PRODUCTION METHOD FOR VINYL ETHER POLYMER
Next Patent: PRODUCTION METHOD FOR VINYL ETHER POLYMER
Next Patent: PRODUCTION METHOD FOR VINYL ETHER POLYMER