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Random body movement cancellation for non-contact vital sign detection
专利权人:
University of Florida Research Foundation; Inc.
发明人:
Jenshan Lin,Changzhi Li,Ya-Chi Liu
申请号:
US15259580
公开号:
US09924906B2
申请日:
2016.09.08
申请国别(地区):
US
年份:
2018
代理人:
摘要:
A method and system for cancelling body movement effect for non-contact vital sign detection is described. The method begins with sending on a first electromagnetic wave transceiver a first electromagnetic signal with a first frequency to a first side of a body, such as a person or animal. Simultaneously using a second electromagnetic wave transceiver a second electromagnetic signal is sent with a second frequency to a second side of a body, wherein the first frequency and the second frequency are different frequencies. A first reflected electromagnetic signal reflected back in response to the first electromagnetic wave on the first transceiver is received and a first baseband complex signal is extracted. Likewise a second reflected electromagnetic signal reflected back in response to the second electromagnetic wave on the second transceiver is received and a second baseband complex signal is extracted. The first baseband complex signal is mathematically combined with the second baseband complex signal to cancel out a Doppler frequency drift therebetween to yield a periodic Doppler phase effect.
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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