US Patent:
20210389342, Dec 16, 2021
Inventors:
- New York NY, US
Robert David ELLIS - London, GB
Chengrui HUANG - New York NY, US
International Classification:
G01P 13/00
G01P 15/08
Abstract:
A method and apparatus are for movement analysis. The apparatus and method receive acceleration data from an accelerometer (or measurements from other motion sensors) that is carried by a user. The acceleration data is divided into epochs and a determination is made as to whether the user is walking or running within each epoch. Consecutive epochs in which the user is found to be walking may be concatenated to determine periods of time during which the user is walking or running. An initial estimate of the time that the user starts to walk or run and stops walking or running are determined for each period of walking. An iterative optimization process is then performed to determine accurate start and stop times for the period of walking or running.