Noncontact self-injection-locked sensor

專利類型

發明

專利國別 (專利申請國家)

美國

專利申請案號

16/200,826

專利證號

US 10,959,679 B2

專利獲證名稱

Noncontact self-injection-locked sensor

專利所屬機關 (申請機關)

國立臺灣科技大學

獲證日期

2021/03/30

技術說明

本研究提出一新型穿戴式自我注入鎖定感測器，該感測器係使用自振式主動天線與微分封包檢測器技術所構成，主要應用於心肺及手腕脈搏之生命徵象參數量測。其中，自振式主動天線除應用於輻射射頻訊號，亦用於偵測受生理震動相位調變之反射訊號。受測者之自我注入接收訊號將鎖定主動天線，同時輸出振幅調變與頻率調變之訊號。欲擷取該調變生理參數，一封包檢波器及微波微分器整合為一頻率解調器，應用於生理訊號解調。本研究提出之感測器心跳與手腕脈動結果與血氧濃度計在心跳頻率量測結果吻合。 This work presents a new wearable self-injection-locked sensor with a self-oscillating active integrated antenna and a differentiator-based envelope detector for the cardiopulmonary and wrist pulse detection. The active integrated antenna is designed to play both roles of radiating the electromagnetic wave and sensing the scattered-back signal, which is phase-modulated by the physiological movement of the human chest and wrist. The received self-injection signal from the subject under test will lock the active integrated antenna, and then simultaneously introduce the output magnitude variation (amplitude modulation) and the oscillation frequency shift (frequency modulation). An envelope detector is integrated with a microwave differentiator to form a differentiator-based envelope detector with the responsibility for demodulation task. The heartbeat and wrist pulse rates measured by the proposed sensor agree the results acquired by the finger pulse oximeter very well.

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