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    • 3. 发明授权
    • Large-aperture imaging using transducer array with adaptive element
pitch control
    • 使用具有自适应元件俯仰控制的换能器阵列的大孔径成像
    • US5902241A
    • 1999-05-11
    • US977082
    • 1997-11-24
    • Mir Said Seyed-BolorforoshAnne Lindsay HallSatchidananda Panda
    • Mir Said Seyed-BolorforoshAnne Lindsay HallSatchidananda Panda
    • G01N29/24A61B8/00G01S7/52G01S15/89G10K11/34H04N7/18
    • G01S7/52046G01S15/8909G10K11/341G01N2291/02491G01S7/52071
    • An adaptive transducer array in which the element pitch is controlled by the imaging system depending on the mode of operation. A multiplicity of transducer elements are connected to a multiplicity of beamformer channels by a multiplexing arrangement having multiple states. In one multiplexer state, successive transducer elements are respectively connected to successive beamformer channels to produce an aperture having a small element pitch equal to the distance separating the centerlines of two adjacent transducer elements. In another multiplexer state, selected transducer elements are respectively connected to successive beamformer channels to produce an aperture having an increased element pitch equal to the small pitch multiplied by a factor of two or more. The aperture is increased by connecting together pairs of adjacent elements to a respective beamformer channel or by connecting every other element to a respective beamformer channel to form a sparse array.
    • 一种自适应换能器阵列,其中元件间距由成像系统根据操作模式来控制。 多个换能器元件通过具有多个状态的复用装置连接到多个波束形成器通道。 在一个复用器状态中,连续的换能器元件分别连接到相继的波束形成器通道以产生具有等于两个相邻的换能器元件的中心线分开的距离的小元件间距的孔。 在另一个多路复用器状态下,选择的换能器元件分别连接到相继的波束成形器通道,以产生具有等于小间距乘以因子2或更大的元件间距增加的孔。 通过将相邻元件的对连接到相应的波束形成器通道或通过将每个其它元件连接到相应的波束形成器通道以形成稀疏阵列来增加孔径。