Patent SG-11201407848Q-A (SG)
Title: Method for step detection and gait direction estimation
Inventor: KORDARI KAMIAR
IPC: G01C22/00
Filed: 2013-05-10
Abstract: (12) INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT) (19) World Intellectual Property Organization International Bureau „ (10) International Publication Number (43) International Publication Date ^ WO 2014/025429 A3 13 February 2014 (13.02.2014) WIPO I PCT (51) International Patent Classification: G01C 22/00 (2006.01) (21) International Application Number: PCT/US2013/040670 (22) International Filing Date: (25) Filing Language: (26) Publication Language: (30) Priority Data: 61/649,178 13/791,443 (71) Applicant: TRX SYSTEMS, INC. [US/US]; 7500 Green- way Center Drive, Suite 420, Greenbelt, MD 20770 (US). (72) Inventors: KORDARI, Kamiar; c/o 7500 Greenway Center Drive, Suite 420, Greenbelt, 20770 (US). FUNK, Benjamin; c/o 7500 Greenway Center Drive, Suite 420, Greenbelt, 20770 (US). NAPORA, Jared; c/o 7500 Greenway Center Drive, Suite 420, Greenbelt, 20770 (US). VERMA, Ruchika; c/o 7500 Greenway Center Drive, Suite 420, Greenbelt, 20770 (US). TEOLIS, Carole; c/o 7500 Greenway Center Drive, Suite 420, Greenbelt, 20770 (US). YOUNG, Travis; c/o 7500 Greenway Center Drive, Suite 420, Greenbelt, MD 20770 (US). (74) Agent: CASEY, Timothy, D.; Baker & Hostetler LLP, Cira Centre, 12th Floor, 2929 Arch Street, Philadelphia, PA 19104-2891 (US). 10 May 2013 (10.05.2013) (81) English English 18 May 2012 (18.05.2012) US 8 March 2013 (08.03.2013) US TRX Systems, Inc., MD TRX Systems, Inc., MD TRX Systems, Inc., MD TRX Systems, Inc., MD TRX Systems, Inc., MD TRX Systems, Inc., (84) Designated States (unless otherwise indicated, for every kind of national protection available)'. AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IS, JP, KE, KG, KM, KN, KP, KR, KZ, LA, LC, LK, LR, LS, LT, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW. Designated States (unless otherwise indicated, for every kind of regional protection available)'. ARIPO (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, SZ, TZ, UG, ZM, ZW), Eurasian (AM, AZ, BY, KG, KZ, RU, TJ, TM), European (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR), OAPI (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, ML, MR, NE, SN, TD, TG). [Continued on next page] (54) Title: METHOD FOR STEP DETECTION AND GAIT DIRECTION ESTIMATION o\ CJ •t CJ o o CJ o & (57) Abstract: A method for detecting a human's steps and estimating the horizontal translation direction and scaling of the resulting motion relative to an inertial sensor is described. When a pedestrian takes sequence of a steps the displacement can be decomposed into a sequence of rotations and translations over each step. A translation is the change in the location of pedestrian's center of mass and rotation a is the change along z-axis of the pedestrian's orientation. A translation can be described by a vector and rotation a by an angle. WO 2014/025429 A3 III llll IIII III III Hill III III III Hill fill 111 lllll fill 111 mill llll 111 llll Declarations under Rule 4.17: — as to applicant's entitlement to apply for and be granted a patent (Rule 4.17(H)) — as to the applicant's entitlement to claim the priority of the earlier application (Rule 4.17(iii)) Published: — before the expiration of the time limit for amending the claims and to be republished in the event of receipt of amendments (Rule 48.2(h)) (88) Date of publication of the international search report: 15 May 2014 — with international search report (Art. 21(3))