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Ambulatory system for measuring and monitoring physical activity and risk of falling and for automatic fall detection
专利权人:
Ashkan Vaziri;Ali-Reza Boloori;Bijan Najafi
发明人:
Bijan Najafi,Ashkan Vaziri,Ali-Reza Boloori
申请号:
US12249948
公开号:
US08206325B1
申请日:
2008.10.12
申请国别(地区):
US
年份:
2012
代理人:
摘要:
The present invention relates to a light-weight, small and portable ambulatory sensor for measuring and monitoring a person's physical activity. Based on these measurements and computations, the invented system quantifies the subject's physical activity, quantifies the subject's gait, determines his or her risk of falling, and automatically detects falls. The invention combines the features of portability, high autonomy, and real-time computational capacity. High autonomy is achieved by using only accelerometers, which have low power consumption rates as compared with gyroscope-based systems. Accelerometer measurements, however, contain significant amounts of noise, which must be removed before further analysis. The invention therefore uses novel time-frequency filters to denoise the measurements, and in conjunction with biomechanical models of human movement, perform the requisite computations, which may also be done in real time.
来源网站:
中国工程科技知识中心
来源网址:
http://www.ckcest.cn/home/
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