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    • 7. 发明授权
    • Method for non-contact particle manipulation and control of particle spacing along an axis
    • 非接触式颗粒操纵和沿着轴线控制颗粒间距的方法
    • US08528406B2
    • 2013-09-10
    • US11923403
    • 2007-10-24
    • Gregory Russ GoddardGregory KaduchakJames Hubert JettSteven Wayde Graves
    • Gregory Russ GoddardGregory KaduchakJames Hubert JettSteven Wayde Graves
    • G01H17/00
    • G01N15/1404G01N2015/142
    • One or more of the embodiments of the present invention provide for a method of non-contact particle manipulation and control of particle spacing along an axis which includes axial and radial acoustic standing wave fields. Particles are suspended in an aqueous solution, and this solution then flows into the cylindrical flow channel. While the solution flows through the flow channel, the outer structure of the flow channel is vibrated at a resonant frequency, causing a radial acoustic standing wave field to form inside the flow channel in the solution. These radial acoustic standing waves focus the particles suspended in the solution to the center axis of the cylindrical flow channel.At the same time, a transducer is used to create an axial acoustic standing wave field in the flow channel parallel to the axis of the flow channel. This drives the particles, which are already being focused to the center axis of the flow channel, to nodes or anti-nodes of the axial standing wave at half-wavelength intervals, depending on whether the particles are more or less dense and more or less compressible than the surrounding fluid.
    • 本发明的一个或多个实施例提供了一种非接触式粒子操纵和沿着包括轴向和径向声驻波的轴的颗粒间隔的控制的方法。 将颗粒悬浮在水溶液中,然后将该溶液流入圆柱形流动通道。 当溶液流过流动通道时,流动通道的外部结构以共振频率振动,导致在溶液中的流动通道内形成径向声驻波。 这些径向声驻波将悬浮在溶液中的颗粒聚焦到圆柱形流动通道的中心轴线上。 同时,传感器用于在平行于流动通道的轴线的流动通道中产生轴向声波驻波场。 这些粒子已经被聚焦到流动通道的中心轴线,以半波长间隔的轴向驻波的节点或反节点驱动,这取决于粒子是多或少密集还是多或少 可压缩比周围的液体。