Title:
INFORMATION PROCESSING DEVICE, INFORMATION PROCESSING METHOD, AND CONTROL PROGRAM
Document Type and Number:
WIPO Patent Application WO/2022/124323
Kind Code:
A1
Abstract:
The present invention finds a road surface vibration coefficient that specifies the relationship between the vibration and movement speed of a vehicle during travel. An information processing device (1) that comprises an acquisition unit that acquires measured values measured by a sensor (3) that is provided to a vehicle (2) while the vehicle travels over a road surface, a vibration feature value calculation unit (22) that calculates a vibration feature value Pv(t) from respective acceleration values for an x, y, and z component included in the acquired measured values on the basis of the given expression (in which NFFT is the tap count of a FFT, p(fi)2=px(fi)2+py(fi)2+pz(fi)2, px(fi), py(fi), and pz(fi) are power values for the frequency band fi found from the respective acceleration values for the x, y, and z components using the FFT, and f0–fn_m are DC components and neighboring frequency bands), and a road surface vibration coefficient calculation unit (24) that calculates a road surface vibration coefficient ρ that is a parameter that represents the character of the road surface on the basis of the calculated vibration feature value Pv(t) and the expression Pv(t)=ρ·v(t)2 (in which v(t) is the speed of the vehicle, and ρ is the road surface vibration coefficient).
Inventors:
KOUROGI MASAKATSU (JP)
Application Number:
PCT/JP2021/045041
Publication Date:
June 16, 2022
Filing Date:
December 08, 2021
Export Citation:
Assignee:
AIST (JP)
International Classes:
G01C23/00; G01C15/00; G01C21/26; G01H17/00; G05D1/12; G08G1/00
Domestic Patent References:
| WO2014010727A1 | 2014-01-16 |
Foreign References:
| JP2011245285A | 2011-12-08 |
Other References:
MASAKATSU KOUROGI, TAKASHI OKUMA, TAKESHI KURATA: "Indoor positioning system using a self-contained sensor module for pedestrian navigation and its evaluation", PROCEEDINGS OF SYMPOSIUM ON MOBILE INTERACTIONS; 03-04/07/2008, XX, 3 July 2008 (2008-07-03) - 4 July 2008 (2008-07-04), JP , pages 151 - 156, XP008177447, ISSN: 1883-2024
OLIVER HEIRICH ; ANDREAS LEHNER ; PATRICK ROBERTSON ; THOMAS STRANG: "Measurement and analysis of train motion and railway track characteristics with inertial sensors", INTELLIGENT TRANSPORTATION SYSTEMS (ITSC), 2011 14TH INTERNATIONAL IEEE CONFERENCE ON, IEEE, 5 October 2011 (2011-10-05), pages 1995 - 2000, XP032023303, ISBN: 978-1-4577-2198-4, DOI: 10.1109/ITSC.2011.6082908
OLIVER HEIRICH ; ANDREAS LEHNER ; PATRICK ROBERTSON ; THOMAS STRANG: "Measurement and analysis of train motion and railway track characteristics with inertial sensors", INTELLIGENT TRANSPORTATION SYSTEMS (ITSC), 2011 14TH INTERNATIONAL IEEE CONFERENCE ON, IEEE, 5 October 2011 (2011-10-05), pages 1995 - 2000, XP032023303, ISBN: 978-1-4577-2198-4, DOI: 10.1109/ITSC.2011.6082908
Attorney, Agent or Firm:
HARAKENZO WORLD PATENT & TRADEMARK (JP)
Download PDF: