A simple non-contact vital sensing method using Doppler sensors applicable to multiple targets.
Summary
This study introduces a simple, non-contact vital sensing method using Doppler sensors. It accurately detects multiple individuals, even when close, estimating signal count, waveform, period, and direction of arrival.
Area of Science:
- Biomedical Engineering
- Signal Processing
- Sensor Technology
Background:
- Non-contact vital sign monitoring is crucial for healthcare.
- Existing methods struggle with multiple subjects in close proximity.
- Doppler sensing offers a promising avenue for radar-based vital sign detection.
Purpose of the Study:
- To develop a simple and effective non-contact vital sensing method using Doppler sensors.
- To address the challenge of sensing multiple individuals simultaneously.
- To enable estimation of key signal parameters for each individual.
Main Methods:
- Utilized Doppler sensors for non-contact signal acquisition.
- Developed a novel signal processing technique to differentiate and analyze signals from multiple sources.
- Implemented algorithms to estimate the number of signals (NOS), fundamental waveform, period, and direction of arrival (DOA).
Main Results:
- Successfully demonstrated the capability to detect and differentiate vital signs from multiple subjects.
- Achieved accurate estimation of NOS, fundamental waveform, period, and DOA for individual signals.
- The proposed method proved computationally efficient, suitable for hardware implementation.
Conclusions:
- The proposed Doppler-based vital sensing method is simple, effective, and robust for multi-person scenarios.
- It offers significant advantages in hardware implementation due to its computational efficiency.
- This technology has potential applications in remote patient monitoring and surveillance.
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