A linear ultrasonic phased array was studied for
nondestructive testing (NDT) of pipes in the oil and
gas industry. For the array design, the theoretical
sound quality was weighed by calculating the
spatially distributed sound pressure for different
array parameters. At the same time, several other
important factors were also taken into consideration.
For example, although a smaller inter-element
distance is advantageous for suppressing the
undesirable sound-grating lobes, a larger distance
is preferable for the benefit of the inspection
speed. The practical testing on pipes with artificial
notches showed the capability of the designed
array. Moreover, the experimental results agreed
with the theoretical implications.
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