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Observations of experimental and numerical waveforms of piezoelectric signals generated in bovine cancellous bone by ultrasound waves

机译:超声波在牛松质骨中产生压电信号的实验和数值波形的观察

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摘要

Experimental and numerical waveforms of piezoelectric signals generated in the bovine cancellous bone by ultrasound waves at 1.0MHz were observed. The experimental observations were performed using a "piezoelectric cell (PE-cell)", in which an air-saturated cancellous bone specimen was electrically shielded. The PE-cell was used to receive burst ultrasound waves. The numerical observations were performed using a piezoelectric finite-difference time-domain (PE-FDTD) method, which was an elastic FDTD method with piezoelectric constitutive equations. The cancellous bone model was reconstructed from the three-dimensional X-ray microcomputed tomographic image of the specimen used in the experiments. Both experimental and numerical results showed that the repetitive piezoelectric signals could be generated by the multireflected ultrasound waves within the cancellous bone specimen. Moreover, it was shown that the output piezoelectric signal in the PE-cell could be the overlap of the local signals in the trabecular elements at various depths (or thicknesses) in the cancellous bone specimen. (C) 2018 The Japan Society of Applied Physics
机译:观察了在1.0MHz的超声波作用下在牛松质骨中产生的压电信号的实验波形和数值波形。使用“压电电池(PE-cell)”进行实验观察,其中对空气饱和的松质骨标本进行电屏蔽。 PE细胞用于接收突发超声波。使用压电有限差分时域(PE-FDTD)方法进行数值观察,该方法是具有压电本构方程的弹性FDTD方法。从实验中使用的标本的三维X射线微计算机断层图像重建了松质骨模型。实验和数值结果均表明,松质骨标本中的多次反射超声波可产生重复的压电信号。而且,已经表明,在PE细胞中输出的压电信号可能是在松质骨样品中不同深度(或厚度)的小梁元件中的局部信号的重叠。 (C)2018日本应用物理学会

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  • 来源
    《Japanese journal of applied physics》 |2018年第7s1期|07LF06.1-07LF06.6|共6页
  • 作者

    Hosokawa Atsushi;

  • 作者单位

    Akashi Coll, Natl Inst Technol, Dept Elect & Comp Engn, Akashi, Hyogo 6748501, Japan;

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  • 正文语种 eng
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