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A quantitative acoustic microscope with multiple detection modes

机译:具有多种检测模式的定量声学显微镜

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An acoustic microscope that permits operation with both toneburst and impulse excitation of the lens is presented. Either mode can be selected and combined with mechanical scanning in any direction. In the impulse-excited mode, the specular and Rayleigh signals from the sample are resolved in time, and analysis is performed to obtain surface wave propagation parameters. The power of the simultaneous application of these techniques is illustrated by measurements on specimens of intact and fractured glass and duraluminum. Reflection and transmission coefficients for a crack are measured, and conclusions are drawn about V(z) processing. These results are significant because the images of cracks produced by the conventional toneburst scanning acoustic microphone (SAM) tend to be complex. Diffraction from the tips of cracks is observed in the microscope.
机译:提出了一种声学显微镜,该显微镜可以同时进行透镜的爆破和脉冲激励。可以选择任何一种模式,并与任何方向的机械扫描结合使用。在脉冲激励模式下,来自样品的镜面反射信号和瑞利信号被及时分辨,并进行分析以获得表面波传播参数。通过对完整和破裂的玻璃和硬铝样品进行测量,可以说明同时应用这些技术的力量。测量裂纹的反射和透射系数,并得出有关V(z)处理的结论。这些结果之所以重要,是因为常规音爆扫描声麦克风(SAM)产生的裂纹图像趋于复杂。在显微镜下观察到裂纹尖端的衍射。

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