In this section
@article{Challinor:2024:10.1016/j.ymssp.2024.111339,
author = {Challinor, C and Pearson, N and Cegla, F},
doi = {10.1016/j.ymssp.2024.111339},
journal = {Mechanical Systems and Signal Processing},
title = {Coded excitation using TOP-CS sequences for multi-channel low-power ultrasonics},
url = {http://dx.doi.org/10.1016/j.ymssp.2024.111339},
volume = {213},
year = {2024}
}
TY - JOUR
AB - This paper presents a low-power hardware architecture that facilitates the simultaneoustransmission and reception of ultrasonic signals when using coded excitations for ultrasonicmeasurements. With this architecture, long pseudo-periodic coded excitations, which havepreviously been unsuitable for pulse-echo measurements, can be used to produce high Signalto-Noise Ratio (SNR) results without an increase in signal dead-zone and without introducingfilter artefacts within a set measurement window. We show that a low-power system (±2 Vpeak excitation amplitude without receiver amplification) utilising such coded excitations canachieve the same level of performance as a conventional high-power system (−200 V peakexcitation amplitude with 15 dB receiver amplification) by producing 45 dB SNR measurementswhilst maintaining a high Pulse Repetition Frequency (PRF) of ≥0.5 kHz. The use of pseudoperiodic sequences to produce quasi-orthogonal sequence families is then demonstrated to allowan arbitrary number of acquisition channels to be used simultaneously with complete crosstalkremoval within a set measurement window. Therefore, the work presented here can open thedoor for the development of simplified low-power multi-channel acquisition systems withoutsacrificing system performance.
AU - Challinor,C
AU - Pearson,N
AU - Cegla,F
DO - 10.1016/j.ymssp.2024.111339
PY - 2024///
SN - 0888-3270
TI - Coded excitation using TOP-CS sequences for multi-channel low-power ultrasonics
T2 - Mechanical Systems and Signal Processing
UR - http://dx.doi.org/10.1016/j.ymssp.2024.111339
VL - 213
ER -