Abstract
In Non-Destructive Testing (NDT), ultrasound imaging is a useful tool for detecting flaws or measuring corrosion in metal pipes. The use of phased arrays is becoming a standard in NDT and with it, the use of post-processing focusing techniques. Such techniques make use of parameters as distance between transducer elements, times of arrival and sound speed propagation to produce focused images. This work proposes a method to estimate one of these parameters, the sound speed, by measuring the sharpness of the reconstructed image. The results, obtained in both simulated and real scenarios, indicate that it is possible to obtain estimates with low error. These results could lead to a method of recovering local sound speeds in nonhomogeneous media.
How to Cite:
de Moura, H. L., Silva, V. O., Guarneri, G. A., Passarin, T. A., Pipa, D. R. & Pires, G. P., (2019) “Image-based ultrasound speed estimation for NDT in homogeneous media”, Review of Progress in Quantitative Nondestructive Evaluation .
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