正交自我注入鎖定雷達

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

106103881

專利證號

I 616669

專利獲證名稱

正交自我注入鎖定雷達

專利所屬機關 (申請機關)

國立中山大學

獲證日期

2018/03/01

技術說明

由於自我注入鎖定機制的特性使然，當待測物振幅超過十分之一操作波長時，將會造成輸出波形的失真而無法準確地判斷頻率資訊；也無法由波形變化得知待測物運動的位移資訊。因此傳統自我注入鎖定雷達適用於感測呼吸與心跳等微弱振動，卻無法滿足大位移的需求，使得應用範圍受限。本計畫將針對此技術瓶頸，提出正交相位切換式SIL雷達，不僅可以保存既有之性能優勢，並可由解調相位得知待測物的完整運動資訊。在訊號處理方法配合下，可將雷達輸出訊號還原為都卜勒效應所造成的相位變化，以得到振動頻率、最大位移、與運動軌跡等資訊。 Since the characteristics of this technique is somehow restricted. When the amplitude of the target is larger than one tenth of the operating wavelength, the output waveform would be distorted, resulting in the detected frequencies being inaccurate, and target movement cannot be deduced from waveform changes. In the light of such limitations, a traditional SIL radar system, only applicable to sensing minor vibrations such as breathing and heartbeat, fails to satisfy the need of large movement sensing and has constrained applications. This project proposes a quadrature-phase switching SIL radar, which not only presents all existing advantages of traditional SIL technology, but also provides complete motion information of the target according to the demodulated phase data. To collect information of vibration frequencies, maximum displacement, and motion trails, signal processing will be adopted to convert output signals from the radar to phase changes caused by the Doppler effect.

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