On ultrasonic methods for measurement of the nonlinear parameter B/A in fluid-like media
On ultrasonic methods for measurement of the nonlinear parameter B/A in fluid-like media
复制标题
类流体介质中非线性参数B/A的超声测量方法
DOI：
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发表时间：
1986
期刊：
影响因子：
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通讯作者：
K. Katakura
中科院分区：
文献类型：
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作者：
C. Cain;H. Nishiyama;K. Katakura
由低频泵浦正弦曲线和高频探头组成的复合波形导致非线性介质中泵浦对探头的相位调制。探测器在泵浦频率处的相位偏差可以直接测量，或者从所得的和或差边带的幅度的测量中推断。相位偏差（或边带幅度）随着泵压和作为介质非线性函数的斜率而线性增加，从而提供用于确定B/A的手段。
A composite waveform consisting of the sum of a low‐frequency pump sinusoid and a higher frequency probe results in phase modulation of the probe by the pump in nonlinear media. The phase deviation in the probe at the pump frequency can be measured directly or inferred from measurement of the magnitude of the resulting sum or difference sidebands. The phase deviation (or sideband magnitude) increases linearly with pump pressure and with the slope as a function of the nonlinearity of the medium, thus providing a means for determination of B/A.