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目的研究基于 36GHz毫米波的非接触生命参数检测系统原理和技术方法。方法将连续波雷达技术和生物医学信号处理技术相结合 ,采用了零中频、频域积累及自适应对消技术。结果在 3m距离内 ,发射功率为 1mW的条件下 ,可以穿透被褥、各类质地衣服检测到人体的呼吸、心跳信号。结论该系统有效、可行 ,其检测灵敏度高 ,对人体安全 ,天线小 ,结构简单 ,易于小型化 ,适合于长时间的非接触监护 ,特别适用于航天领域。
Objective To study the principle and technique of non-contact life parameter detection system based on 36GHz millimeter wave. Methods The continuous wave radar technology and biomedical signal processing technology are combined, using zero IF, frequency domain accumulation and adaptive cancellation technology. Results within 3m distance, the launch power of 1mW conditions, can penetrate the bedding, all kinds of texture clothes to detect the body’s breathing, heart rate signal. Conclusion The system is effective and feasible. It has high detection sensitivity, good safety for human body, small antenna, simple structure and easy miniaturization. It is suitable for prolonged non-contact monitoring and is especially suitable for aerospace field.