基于模糊集的相控阵超声监测成像图像增强研究

摘要

Ultrasonic signal processing techniques to get more accurate image monitoring. Dominate the beam orien-tation by controlling the signal time delay,in order to monitor the structural damage. Analysis of the characteristics of signal of structural damage cases does a favor to enhance the signal-to-noise ratio. Then the monitoring signal can be displayed in the way of gray level image according to the scanning angle. Because of the defect of the original im-age,dealing the image with the photographic enhancement which bases on fuzzy sets can improve the image recogni-tion. The method is analyzed in the aluminum sheet structure,validating the correctness and availability.%利用超声信号处理的方法，得到更准确的监测图像。通过控制阵元激发信号的时间延迟来控制波束的指向，进而实现结构中的损伤监测。分析结构损伤状况下接收到的信号，根据相控阵原理控制信号的延迟和聚焦，获得更高信噪比的信号。并将相应角度上的监测信号用图像的灰度级来表示。因为原始数据得到的图像并不清晰，所以采用模糊集的图像增强方法进行处理，提高图像的可识别度。该方法在铝板结构中进行实验分析，验证了方法的正确性和有效性。