Title:
GAIT ANALYSIS AND ANOMALY DETECTION METHOD BASED ON WEARABLE STEP SENSOR
Document Type and Number:
WIPO Patent Application WO/2023/108315
Kind Code:
A1
Abstract:
A gait analysis and anomaly detection method based on a wearable step sensor, which relates to the technical field of computer applications. The method comprises the following steps: S1, acquiring data by means of an inertial sensor; S2, performing coordinate system conversion on a measurement value output by the sensor; S3, dividing gait cycles; S4, performing zero-speed interval detection; S5, performing discrete integration on the angular velocity; S6, evaluating gait complexity on the basis of elliptic Fourier analysis; S7, evaluating gait symmetry on the basis of a Pearson correlation coefficient; and S8, detecting abnormal gaits on the basis of a gait phase diagram. A zero-speed interval detection method based on data fusion technologies is provided to avoid jumps during the determination of a zero-speed interval in a traditional detection method. Acceleration and angular velocity are fused and a window is added to accurate find the zero-speed interval. A gait phase diagram is fitted by means of elliptic Fourier analysis to evaluate abnormal gaits, thereby avoiding the interference of inertial gravity on acceleration.
Inventors:
SUN FANGMIN (CN)
TANG JIAHUI (CN)
LI YE (CN)
TANG JIAHUI (CN)
LI YE (CN)
Application Number:
PCT/CN2021/137344
Publication Date:
June 22, 2023
Filing Date:
December 13, 2021
Export Citation:
Assignee:
SHENZHEN INST OF ADV TECH CAS (CN)
International Classes:
A61B5/11
Foreign References:
| CN105865450A | 2016-08-17 | |||
| US20120144916A1 | 2012-06-14 | |||
| US20200215324A1 | 2020-07-09 |
Other References:
MING JIANG, QIU SEN, ZHAO YANG, ZHANG ZHI: "Wireless gait analysis platform based on inertial measurement device", JOURNAL OF DALIAN UNIVERSITY OF TECHNOLOGY, 093072699, vol. 56, no. 5, 22 September 2016 (2016-09-22), pages 518 - 522, XP093072705
FENG WANG, ZOU YA, QIAO ZIYAN, GAO SHUAIFENG, LIU CHUNFENG: "Quantitative analysis of walking performance of patients with Parkinson's disease", JOURNAL OF SOUTHEAST UNIVERSITY(NATURAL SCIENCE EDITION), vol. 45, no. 2, 20 March 2015 (2015-03-20), pages 266 - 269, XP093072710
JIANG MING, ZHAO HONGYU, LIU XUELIANG: "An Adaptive Gait Detection Method Based on Clustering Analysis", JOURNAL OF ZHENGZHOU UNIVERSITY(ENGINEERING SCIENCE), vol. 38, no. 3, 23 May 2017 (2017-05-23), pages 63 - 67, XP093072707
FENG WANG, ZOU YA, QIAO ZIYAN, GAO SHUAIFENG, LIU CHUNFENG: "Quantitative analysis of walking performance of patients with Parkinson's disease", JOURNAL OF SOUTHEAST UNIVERSITY(NATURAL SCIENCE EDITION), vol. 45, no. 2, 20 March 2015 (2015-03-20), pages 266 - 269, XP093072710
JIANG MING, ZHAO HONGYU, LIU XUELIANG: "An Adaptive Gait Detection Method Based on Clustering Analysis", JOURNAL OF ZHENGZHOU UNIVERSITY(ENGINEERING SCIENCE), vol. 38, no. 3, 23 May 2017 (2017-05-23), pages 63 - 67, XP093072707
Attorney, Agent or Firm:
BEIJING CHENGHUI LAW FIRM (CN)
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