Research on the Influence of Noise to Laser Ultrasound SAFT for Lead Defect Detection. (September 2020)

• Record Type: Journal Article
• Authors: Yang, Ting; He, Wen; He, Jianzong; He, Haohui; Yuan, Jinjing; Zhang, Wan; Yuan, Ling; Zhang, Hongchao
• Is Part Of: Journal of physics. Volume 1622(2020)
• Publication Date: 2020-09
• Subjects: Physics -- Congresses; 530.5
• DOI: 10.1088/1742-6596/1622/1/012015
• Languages: English
• ISSNs: 1742-6588

Abstract

Abstract: Synthetic Aperture Focusing (SAFT) is one of the methods to improve the spatial resolution in the traditional acoustics field. Its basic principle is to combine a series of small-aperture sensors to replace a large-aperture sensor in order to improve the detection lateral resolution. However, the practical detection results will be affected by noise. In this paper, the time-domain B-scan signal is obtained by establishing a physical model of a lead sample containing defects and computing with finite element method. Then, the influence of noise with different signal-tonoise ratio(SNR) on SAFT imaging results is studied. The results show that SAFT algorithm has better anti-noise performance, and can still obtain good results even when the SNR is low.