Real-Time Step-Count Detection and Activity Monitoring Using A Triaxial Accelerometer

Real-time estimation of daily physical activity intensity by a triaxial accelerometer and a gravity-removal classification algorithm.

We have recently developed a simple algorithm for the classification of household and locomotive activities using the ratio of unfiltered to filtered synthetic acceleration (gravity-removal physical activity classification algorithm, GRPACA) measured by a triaxial accelerometer. The purpose of the present study was to develop a new model for the immediate estimation of daily physical activity i...

A Simple and Fast Method for Field Calibration of Triaxial Gyroscope by using Accelerometer

Comparison of Self-Reported and Accelerometer-Assessed Physical Activity in Older Women

BACKGROUND Self-reported physical activity measures continue to be validated against accelerometers; however, the absence of standardized, accelerometer moderate-to-vigorous physical activity (MVPA) definitions has made comparisons across studies difficult. Furthermore, recent accelerometer models assess accelerations in three axes, instead of only the vertical axis, but validation studies have...

Using Triaxial Accelerometer Data for Vibration Monitoring of Helicopter Gearboxes

Typical vibration monitoring systems for helicopter gearboxes rely on single-axis accelerometer data. This paper investigates whether triaxial accelerometers can provide crucial flight regime information for helicopter gearbox monitoring systems. The frequency content of the three different directions is compared and analyzed using time-synchronously averaged vibration data. The triaxial data a...

Multi-Person Pose Recognition Using a Zigbee Sensor Network

This paper presents a novel design of a robotic multi-person posture recognition system. The proposed system consists of a human posture detection module, a wireless sensor network and a multi-person activity monitoring software running on a mobile robot. The human posture detection is based on a triaxial accelerometer and the developed posture recognition algorithms. Further, the posture detec...