運用都卜勒雷達測量物體一維運動之位移、速度及加速度

Accurate Measurement of Displacement, Velocity and Acceleration of a One-dimensional Motion Object Based on Doppler Radar Technology

蘇芳生(Fang-Sheng Su)

指導教授 ： 張盛富

國立中正大學/工學院/電機工程學系/碩士(2015年)

摘要

本論文設計一精密位移感測雷達，其測量物體一維運動至幾十μm等級的準確度。為了消除環境回波的干擾，在標籤上加入負載調變電路，使得經由標籤反射之載波具有相位調變，易於接收機從環境干擾回波中截取所要訊號。系統發射一2.4 GHz電磁載波，回波為帶有調變之載波，經濾波、放大後降頻至I、Q基頻訊號，在利用訊號擷取介面卡(DAQ)輸出至電腦，透過後端執行去雜訊、反正切解調、和位移相位累積演算法，從回波相位中求得運動之動態位移、速度及加速度。實驗結果顯示，在15 cm的運動位移，量測準確度低於1.3 mm；在1 mm的運動位移，準確度達46 μm。

關鍵字

反正切解調 ； 都卜勒雷達 ； 位移

並列摘要

In this thesis, an accurate displacement-measurement Radar was developed to measure an object’s one-dimensional motion parameters with sub-millimeter accuracy. To eliminate the clutter interferences from surrounding environment scattering, the load modulation technique was applied to the motion tag so that the receiver can extract the motion parameters of the desired target from the environment scattering interferences. The Radar transmits a 2.4 GHz continuous wave and the reflected signal with the interferences are filtered, amplified and down-converted to baseband in-phase and quadrature-phase signals. Then the displacement, velocity and acceleration are retrieved by executing noise elimination, arctangent demodulation, and phase accumulation. The experiments results demonstrated that the detection error is less 1.3 mm for a 15 cm displacement and less 46 μm for 1 mm displacement.

並列關鍵字

Arctangent demodulation ； Doppler radar ； Displacement

參考文獻

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