Research on a physical activity tracking system based upon three‐axis accelerometer for patients with leg ulcers

Abstract

Venous leg ulcerations are a common problem, with high prevalence in the middle-aged and elderly population, and more attention on research of their physical activities has been paid, as they have great effects on the blood circulation of the lower limb. With enough, appropriate training, the chronic venous ulcerations in the lower limb can be avoided and alleviated, and venous hypertension can be reduced effectively. The study deals with a physical activity tracking system for the patients based on a three-axis accelerometer. The system uses a three-axis accelerometer, a microcontroller, and a wireless Bluetooth module to form a data acquisition platform to acquire accelerations of the lower limb movement, and sends it to a smart mobile phone via the wireless Bluetooth module. The system takes advantages of the smart mobile phone to guide the chronic venous leg ulcers to do prescribed rehabilitation exercises for the lower limb muscles, perform acceleration data preprocessing, wavelet transform and reconstruction, denoising and feature extraction, obtain the results of the rehabilitation exercises, and then give reasonable evaluation and judgment. It is helpful to treat underlying venous reflux, create such an environment that allows skin to grow across an ulcer, and accelerate ulcer healing process consequently.

Nine‐Axis Sensor for Athlete Physical Training Load Characteristics

“…Domestic-related research is still focused on quantitative evaluation algorithm research, and commercial products have not been reported. Many foreign companies have carried out research and development of PD quantitative evaluation products, such as the Research Kit launched by Apple, which aims to provide corresponding interfaces for PD patient data collection [ 4 ]. Kinesia 360, a quantitative evaluation system for human motor function, was developed by Cleveland Medical Instrument Company in the United States, which adopted accelerometer and gyroscope sensors to record motion information; the device was worn on the wrist and fingers of patients to dynamically monitor upper limb motor dysfunction [ 5 ].…”