Abstract
The report presents an algorithm called the total focusing method for the circular phased array. It shows an improvement in the focusing for the main lobe beam and eliminates the effects of the side lobe. The report visualizes the effects for different ring sizes of the circular array and the effect of different numbers of array elements. The results of this modelling indicate that, for a given number of elements, placing them around the circular ring allow them to perform best and that the element spacing should be less than half a wavelength to avoid grating lobes and to eliminate grating lobes. In addition to that it describes how the TFM images have been built by computing half time traces of the transmitter and receiver array.
| Original language | English |
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| Journal | NDT.net |
| Publication status | Published - 1 May 2016 |
Keywords
- Phased array, ultrasonic beam focusing and total focusing method