Title:
METHOD OF ESTIMATING POSITION OF USER DEVICE
Document Type and Number:
WIPO Patent Application WO/2014/006423
Kind Code:
A3
Abstract:
The invention provides a method of estimating the position of a user device carried by a user, the method comprising: providing an initial position of the user device; measuring a vertical acceleration of the user device, thereby generating vertical acceleration data; measuring an orientation of the user device, thereby generating principal direction data; processing the vertical acceleration data to detect one or more steps taken by the user, and subsequently validating the detection of one or more of said one or more steps; generating one or more motion vectors in respect of the validated steps taken by the user using the principal direction data; and estimating an updated position of the user device by combining the motion vector(s) with the initial position. The method may be used by, for example, a smartphone to estimate its position, particularly where other positioning systems are unavailable.
Inventors:
SUN RONGZE (GB)
ARSLAN TUGHRUL SATI (GB)
ALSEHLY FIRAS (GB)
SEVAK ZANKAR UPENDRAKUMAR (GB)
ARSLAN TUGHRUL SATI (GB)
ALSEHLY FIRAS (GB)
SEVAK ZANKAR UPENDRAKUMAR (GB)
Application Number:
PCT/GB2013/051793
Publication Date:
March 13, 2014
Filing Date:
July 05, 2013
Export Citation:
Assignee:
SENSEWHERE LTD (GB)
International Classes:
G01C21/20; G01C21/12; G01C22/00
Domestic Patent References:
| WO2009021068A1 | 2009-02-12 |
Foreign References:
| US20110282620A1 | 2011-11-17 | |||
| US20080077326A1 | 2008-03-27 | |||
| DE102008054739A1 | 2010-06-17 | |||
| US20100125414A1 | 2010-05-20 | |||
| US20090143199A1 | 2009-06-04 |
Attorney, Agent or Firm:
HINDLE, Alistair Andrew (Edinburgh EH2 1EL, GB)
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