A Method for Distinguishing Between Human and Pets Using Non-Contact Ultra-Wideband
Bio-Radar under Free Space Condition
HUANG Wenzhe1, GONG Jia1, MA Yangyang2, LV Hao3, XUE Huijun3
1. Department of Biomedical Engineering, General Hospital of Eastern Theater Command Hospital, Nanjing Jiangsu 210002, China;
2. Department of Biomedical Engineering, Air Force Hospital of Southern Theater Command of PLA, Guangzhou Guangdong
510062, China; 3. Department of Medical Electronics, School of Biomedical Engineering, Air Force Medical University,
Xi’an Shaanxi 710032, China
Abstract：Objective To propose a non-contact biological radar signal processing algorithm for identifying human and animal so as
to enhance the accuracy and robustness of identification. Methods An ultra-wideband (UWB) radar on a chip with 7.29 GHz center
frequency and 1.4 GHz band width was utilized to collect radar signals from human and animals in free-space condition. After signal
preprocessing of direct current filtering, low-pass filtering, adaptive filtering, an improved feature of respiratory and heartbeat energy
ratio was extracted from aspects of frequency and energy. Results Human and animals identification results showed that compared
with the traditional respiration and heartbeat energy ratio characteristics, the proposed feature in this paper of improved respiratory
and heartbeat energy ratio owned higher accuracy and higher robustness, and could eliminate the phenomenon of identification and
misjudgment caused by individual differences. Conclusion The improved feature of respiratory and heartbeat energy ratio extracted
from UWB radar signals can identify human and animal targets more accurately. The method can be employed as the underlying
technology of the non-contact intelligent health monitoring equipment to help it identify the target, thereby ensuring the accuracy and
reliability of the signal source. Thus, it has significant value in applications.
黄文哲1，宫佳1，马洋洋2，吕昊3，薛慧君3. 一种自由空间下非接触辨识人与动物的生物雷达信号处理算法[J]. 中国医疗设备, 2023, 38(3): 8-13.
HUANG Wenzhe1, GONG Jia1, MA Yangyang2, LV Hao3, XUE Huijun3. A Method for Distinguishing Between Human and Pets Using Non-Contact Ultra-Wideband
Bio-Radar under Free Space Condition. China Medical Devices, 2023, 38(3): 8-13.
