ACCELERATION SENSOR OUTPUT PROCESSING PROGRAM, PROCESSING METHOD, AND PROCESSING DEVICE, AND GAIT ASSESSMENT PROGRAM

WIPO Patent Application WO/2014/091583

A1

The purpose of the invention is to find the acceleration in both left and right directions of a gait state from sensor values of an acceleration sensor using simple arithmetic processing, such as the four arithmetic operations. An acceleration sensor output processing program executes, on a computer, acceleration sensor output processing that generates acceleration magnitudes for both the left and right directions from sensor values, detected during walking, of a three-axis acceleration sensor, wherein the acceleration sensor output processing has: a step of generating a cross product of a gravity component vector extracted from the sensor value with a low pass filter and an oscillation component vector extracted by a high pass filer; a step of finding a first value corresponding to the magnitude of the cross product; a step of determining the gait cycle of odd numbered strides and the gait cycle of even numbered strides; and a step of generating an acceleration magnitude for both the left and right directions, corresponding to the determination result, by inverting the sign of the first value.

SENTA YOSUKE (JP)
NAGASHIMA FUMIO (JP)
SUGIMOTO TAKANAO (JP)
YAMAGUCHI KATSUYOSHI (JP)
KITA TAKEO (JP)

PCT/JP2012/082240

June 19, 2014

December 12, 2012

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FUJITSU LTD (JP)

G01P15/00; G01C21/12; G01P15/18

JP2012063208A	2012-03-29
JP2009244102A	2009-10-22
JP2012168004A	2012-09-06

DOI Kenji et al. (JP)
Kenji Doi (JP)

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