非接觸式相位鎖定暨自我注入鎖定生理信號感測器

專利類型

發明

專利國別 (專利申請國家)

中華民國

專利申請案號

108111482

專利證號

I 705795

專利獲證名稱

非接觸式相位鎖定暨自我注入鎖定生理信號感測器

專利所屬機關 (申請機關)

國立臺灣科技大學

獲證日期

2020/10/01

技術說明

A new phase-locked and self-injection-locked radar sensor with a self-oscillating active-integrated-antenna and a phase-locked-loop demodulator is presented for noncontact vital sign detection. The AIA is developed to simultaneously radiate the radio-frequency signal and receive the scattered-back injection signal, which is phase-modulated by the chest movement of the human subject. According to the injection-locking theory, the oscillation frequency of the AIA will be shifted by injecting a signal with a phase variation, which amounts to the frequency modulation. Hence, the vital sign can be demodulated by a PLL demodulator. The developed radar sensor has been experimentally verified as the human subject is located at the distances of 1.5 m away from the radar sensor.

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