School of Non-Destructive Testing, National Research Tomsk Polytechnic University, 30 Lenin Avenue, 634050 Tomsk, Russia.
Sensors (Basel). 2023 May 15;23(10):4757. doi: 10.3390/s23104757.
In the article, the study of the quality of tomogram focusing during the inspection of objects with curved surfaces by flexible acoustic array was described. The main goal of the study was theoretically and experimentally define the acceptable deviation limits of the elements' coordinates values. The tomogram reconstruction was performed by the total focusing method. The Strehl ratio was chosen as a criterion for assessing the quality of tomogram focusing. The ultrasonic inspection procedure were simulated and validated experimentally by means of convex and concave curved arrays. In the study, it was proven that the elements coordinates of the flexible acoustic array were determined with an error of no more than 0.18λ and the tomogram image was obtained in sharp focus.
本文描述了使用柔性声学阵列对曲面物体进行检测时，对断层图像聚焦质量的研究。研究的主要目标是从理论和实验两方面确定元件坐标值可接受的偏差限值。断层图像重建采用全聚焦方法。选择斯特列尔比作为评估断层图像聚焦质量的标准。通过凸面和凹面的弯曲阵列对超声检测过程进行了模拟和实验验证。在研究中证明，柔性声学阵列的元件坐标的确定误差不超过 0.18λ，并且获得了清晰聚焦的断层图像。
