The Fourth Military Medical University

Air Force Medical University

Xiao Yu

Yang Zhang

Zhao Li

Jianqi Wang

Teng Jiao

Ziqi Zhang

Huijun Xue

Hao Lv

Fulai Liang

Xijing Jing

Yanfeng Li

Hao Lu

A non-contact method for detecting and distinguishing a human and an animal based on IR-UWB bio-radar signals includes: step 1, transmitting a radar pulse to a target by a transmitting antenna of an IR-UWB bio-radar; and obtaining, by a receiving antenna of the IR-UWB bio-radar, a radar echo signal E(n,m) generated from the radar pulse reflected on the target; step 2: performing signal preprocessing on the radar echo signal E(n,m) obtained in step 1, to obtain a first energy signal E(l); step 3: removing a direct wave from E(l) obtained in step 2 to obtain a second energy signal E(l), and obtaining a maximum amplitude Eof E(l) and a position lcorresponding to the maximum amplitude in a slow time direction; step 4: calculating a peak-to-background ratio Vof E(l), calculating an average correlation coefficient r, and determining a type of the target through a target detection and distinction rule.

Non-contact method for detectiing and distinguishing human and animal based on IR-UWB bio-radar signal

A multichannel UWB-based radar life detector includes a transmitting antenna and three receiving antennas for forming three radar echo signal channels. A 2-dimensional positioning method thereof includes: a1) amplifying weak life signals of stationary human by the channels, providing an 8-point integration method with an interval of 4 points to radar echo signals by distance; then breaking the integrated signals for decomposition and reconstruction in such a manner that target echo signals and three distance signals are formed; providing digital filtering and differential to the target echo signals for amplifying the weak but useful life signals; a2) 1-dimensionally distinguishing the signals by distance, analyzing spatial frequency according to the filtered and differentiated target echo signals as well as the distance signals for obtaining three target projection signals in the three channels; and a3) identifying the 2-dimensional position information of the targets according to the projection signals, forming an image.

Multichannel UWB-based radar life detector and positioning method thereof

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Xi'an, China

Xiao Yu