Detection of crack in a shallow layer of mortar by using a harmonic component of very high intensity aerial ultrasonic waves
Detection of crack in a shallow layer of mortar by using a harmonic component of very high intensity aerial ultrasonic waves
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利用甚高强度航空超声波的谐波分量检测浅层砂浆中的裂缝
DOI：
10.7567/jjap.56.07jc12
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发表时间：
2017
影响因子：
1.5
通讯作者：
Youichi Ito
中科院分区：
文献类型：
--
作者：
A. Osumi;M. Ogita;Kazuya Okitsu;Youichi Ito
我们开发了一种非接触，无损成像的方法在固体物体中的缺陷与高强度的航空超声波和光学设备。该方法通过分析用空中超声波连续照射的物体表面上的速度分布来检测成像区域中的缺陷。在这项研究中，我们试图检测一个裂缝在一个浅层的砂浆。我们使用的高强度声波的非线性，我们成像的矩形缺陷模仿裂纹（宽度：1毫米）使用谐波分量的振动速度。我们的方法成功地成像的矩形缺陷，显示其应用于实际裂纹检测的可能性。
We developed a noncontact, nondestructive method of imaging defects in solid objects with high-intensity aerial ultrasonic waves and optical equipment. The method detects defects in the imaged area by analyzing the velocity distribution on the surface of an object continuously irradiated with aerial ultrasonic waves. In this study, we attempted to detect a crack in a shallow layer of mortar. We used the nonlinearity of high-intensity sound waves and we imaged a rectangular defect imitating a crack (width: 1 mm) using harmonic components of the vibration velocity. Our method successfully imaged the rectangular defect, showing the possibility of its application to the detection of actual cracks.