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1. (WO2017148701) MEASUREMENT APPARATUS AND CORRECTION METHOD

Pub. No.:    WO/2017/148701    International Application No.:    PCT/EP2017/053334
Publication Date: Sat Sep 09 01:59:59 CEST 2017 International Filing Date: Thu Feb 16 00:59:59 CET 2017
IPC: A61B 5/11
A61B 5/00
Applicants: KONINKLIJKE PHILIPS N.V.
Inventors: PAPINI, Gabriele
BONOMI, Alberto Giovanni
Title: MEASUREMENT APPARATUS AND CORRECTION METHOD
Abstract:
A measurement apparatus (10) for calculating one or more features characterizing an activity of a subject (12) is presented. The measurement apparatus comprises a wearable base part (14) including an accelerometer (16) adapted to measure a motion of the base part and to provide an acceleration signal. The apparatus further comprises a memory device (20) which is adapted to store reference acceleration data. Still further, the apparatus comprises a correction unit (22) which is adapted (i) to select a correction formula depending on an activity type which is determined based on the acceleration signal or defined by the subject, (ii) to determine a correction coefficient based on a frequency component of the measured acceleration signal and on the stored reference acceleration data, (iii) to correct a magnitude component of the measured acceleration signal or a feature derived from the magnitude component based on the selected correction formula using the determined correction coefficient, and (iv) to calculate the one or more features characterizing the activity of the subject (12) based on the corrected magnitude component of the measured acceleration signal.