title: Low-power metabolic equivalents estimation algorithm using adaptive acceleration sampling.
abstract: This paper describes a proposed low-power metabolic equivalent estimation algorithm that can calculate the value of metabolic equivalents (METs) from triaxial acceleration at an adaptively changeable sampling rate. This algorithm uses four rates of 32, 16, 8 and 4 Hz. The mode of switching them is decided from synthetic acceleration. Applying this proposed algorithm to acceleration measured for 1 day, we achieved the low root mean squared error (RMSE) of calculated METs, with current consumption that was 41.5 % of the value at 32 Hz, and 75.4 % of the value at 16 Hz.
authors.forename: Mio
authors.initials: M
authors.lastname: Tsukahara
authors.forename: Motofumi
authors.initials: M
authors.lastname: Nakanishi
authors.forename: Shintaro
authors.initials: S
authors.lastname: Izumi
authors.forename: Yozaburo
authors.initials: Y
authors.lastname: Nakai
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Kawaguchi
authors.forename: Masahiko
authors.initials: M
authors.lastname: Yoshimoto
mesh_terms: D000054:Acceleration; D000328:Adult; D000465:Algorithms; D003663:Decision Trees; D015444:Exercise / Q000502:physiology; D005260:Female; D006801:Humans; D008297:Male; D055686:Metabolic Equivalent; D055815:Young Adult