Simulations to Improve Structural Defect Detection and Classification in Swiss-Cheese

Eskelinen, Joona; Haapalainen, Jonne; Alavuotunki, A.; Hæggström, Edward; Alatossava, Tapani

doi:10.1063/1.2902632

Cited by 1 publication

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“…The measurements should be done from a single side of the cheese block, through plastic maturation wrapper using only water coupling. Defect detection will be based on combining A-line signal analysis [4] with image analysis [5].…”

Section: Introductionmentioning

confidence: 99%

P4G-2 Structural Cheese Analysis Using Phased Array System

Eskelinen

Haapalainen

Virolainen

et al. 2007

2007 IEEE Ultrasonics Symposium Proceedings

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We develop an ultrasonic method for nondestructive structural quality analysis of Swiss-cheese. A phased array solution has been implemented to allow fast measurements, dynamic focusing and to alleviate shadowing problems. Initial results exploiting this setup are presented. The results show the potential of the method. However, high attenuation causes frequency downshift, which decreases the resolution as a function of probing depth. Structural inhomogeneity decreases the SNR of acquired signals. These issues lead to a high dynamic range demand for the system. Sophisticated imaging methods should be utilized to fully exploit the beam focusing and deflection capabilities of phased arrays, while maintaining rapid measurements. Compared to our earlier work with single transducer setup, a ten times decrease in measurement time was obtained.

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Section: Introductionmentioning

confidence: 99%