VMD融合EWT对复杂环境中生命体征的探测方法
By fusing VMD with EWT, the problems of accurate positioning of vital signs and low signal-to-noise ratio in complex environments are solved. High-precision vital sign detection is achieved in the presence of obstacles and pedestrians, enhancing signal quality and suppressing noise interference, while ensuring privacy protection.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- TAIYUAN UNIVERSITY OF TECHNOLOGY
- Filing Date
- 2023-09-07
- Publication Date
- 2026-07-17
AI Technical Summary
Existing technologies cannot accurately locate vital signs in complex environments (with obstacles, pedestrians passing by), the signal-to-noise ratio of heartbeat and breathing signals is not high, and there are privacy issues.
The method employs variational mode decomposition (VMD) fused with empirical wavelet transform (EWT) to acquire echo signals from ultra-wideband radar, construct echo energy contour projection maps, extract features using principal component analysis, adaptively reconstruct respiratory and heartbeat signals, and obtain high signal-to-noise ratio signals by segmenting the spectrum using empirical wavelet transform.
It improves the accuracy of vital sign location in complex environments, enhances signal quality, suppresses environmental noise interference, and ensures signal reliability and privacy.
Smart Images
Figure CN117169846B_ABST