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    • 2. 发明授权
    • Medical diagnostic ultrasound transducer system for harmonics
    • 医用诊断超声波传感器系统谐波
    • US07713199B2
    • 2010-05-11
    • US11192857
    • 2005-07-28
    • Jian-Hua MoTimothy L. ProulxCharles E. Bradley
    • Jian-Hua MoTimothy L. ProulxCharles E. Bradley
    • A61B8/00
    • B06B1/064G01S7/52038G01S15/8952
    • A medical diagnostic ultrasound transducer system has at least a first and a second set of transducer layers of an element. Each set has one or more transducer layers with independent electrical access. A transmit event through a first set of transducer layers with broadband electrical signals generates acoustic signals containing at least two different frequency bands, and a receive event through a second and different set of transducer layers receives multiple tissue harmonic signals to generate a wide bandwidth response. Fundamental signals can be reduced with a pulse inversion technique through a second transmit event of inverted pulses, a second receive event and superposition of signals from the two receive events.
    • 医疗诊断超声换能器系统具有元件的至少第一和第二组换能器层。 每组具有一个或多个具有独立电接入的换能器层。 通过具有宽带电信号的第一组换能器层的发射事件产生包含至少两个不同频带的声学信号,并且通过第二和不同组的换能器层的接收事件接收多个组织谐波信号以产生宽带宽响应。 可以通过脉冲反转技术通过反向脉冲的第二发送事件,第二接收事件和来自两个接收事件的信号的叠加来减少基本信号。
    • 3. 发明授权
    • Multi-dimensional ultrasound transducer array
    • 多维超声换能器阵列
    • US07567016B2
    • 2009-07-28
    • US11051349
    • 2005-02-04
    • Xuan-Ming LuTimothy L. ProulxLewis J. Thomas, IIIWorth B. Walters
    • Xuan-Ming LuTimothy L. ProulxLewis J. Thomas, IIIWorth B. Walters
    • H01L41/047H01L41/083
    • B06B1/0622
    • In k31 mode, a vibration is along an axis or orthogonal to the poling or electric field orientation. The direction of vibration is toward a face of an ultrasound transducer array. For each element of the array, electrodes are formed perpendicular to the face of the array, such as along the sides of the elements. Piezoelectric material is poled along a dimension parallel with the face of the transducer and perpendicular to the direction of acoustic energy propagation. Using elements designed for k31 resonant mode operation may provide for a better electrical impedance match, such as where small elements sizes are provided for a multi-dimensional transducer arrays. For additional impedance matching, the elements may be made from multiple layers of piezoelectric ceramic. Since the elements operate from a k31 mode, the layers are stacked along the poling direction or perpendicular to a face of the transducer array for transmitting or receiving acoustical energy.
    • 在k31模式下,振动沿轴线或正交于极化或电场取向。 振动的方向是朝向超声波换能器阵列的面。 对于阵列的每个元件,电极垂直于阵列的表面形成,例如沿着元件的侧面。 压电材料沿着与换能器的表面平行且垂直于声能传播方向的尺寸极化。 使用为k31谐振模式操作设计的元件可以提供更好的电阻抗匹配,例如为多维换能器阵列提供小元件尺寸的那些。 对于额外的阻抗匹配,元件可以由多层压电陶瓷制成。 由于元件从k31模式操作,所以这些层沿着极化方向或垂直于换能器阵列的表面堆叠以发射或接收声能。