[2B1] Robustness of coded excitation for ultrasonic systems
C Challinor¹, F Cegla¹ and N Pearson²
¹Imperial College London, UK
²Eddyfi Technologies, UK
Coded excitation has been researched extensively across several active ranging applications, including ultrasonic non-destructive testing, for improving signal quality. Despite many publications highlighting the significant improvements that can be achieved through coded excitation, there has been limited uptake of the technique in industrial equipment. The authors believe that a lack of understanding of the robustness of the approach in practical scenarios can partially explain this. This work highlights the main practical challenges associated with coded excitations, namely imperfections that are introduced by the excitation hardware and variations in propagation paths during acquisitions. The effect of these imperfections on the final acquired signal was determined quantitatively and conclusions about the conditions for successful reception of ultrasonic signals using coded excitation with an acceptable performance level are presented.
