本研究成功讓流動中的微粒被聲波抓取，且利用調變波技術判斷此微粒之種類。透過COMSOL模擬出顆粒在管中流動、水中聲輻射壓力，以及調變波之動態分析的情況，進而模擬出各個對於實驗有影響的參數。然而聲波對於不同情況會有不同的實驗方法，為此我們設計了一系列不同的實驗情況，對於不同粒徑的微粒所表現出來的抓取情況也會有所不同，對於不同密度的微粒也可以透過調整調變波的參數，成功抓取出特定微粒，也判斷出不同密度的顆粒差異。而目前實驗階段，可以在混合的微粒溶液的情況下，分離出半波長大小的塑膠微粒。;This study successfully utilized acoustic waves to trap particles in flow and employed modulation wave techniques to determine the types of these particles. Using COMSOL, we simulated the flow of particles in a tube, the acoustic radiation force in water, and the dynamic analysis of modulation waves, thereby simulating various parameters that could affect the experiment. However, different experimental methods are required for different situations. To address this, we designed a series of experiments. The trapping performance varies for particles of different sizes, and the parameters of the modulation waves can be adjusted for particles of different densities. Ultimately, we successfully trapped specific particles under different conditions and verified the use of modulation waves to distinguish between particles of different densities. At the current experimental stage, we are able to separate plastic particles of half-wavelength size from a mixed particle solution.
