Mosolab O. Methods and tools for accuracy improvement of spatio-temporal characteristics measurements of ultrasound linear phased arrays

The study is dedicated to creation of new and improvement of existing methods and tools for accuracy improving of spatio-temporal characteristics measurements of ultrasound phased arrays. The study involves spatio-temporal characteristics measurement errors analysis. This allowed to identify errors that most affect the accuracy of measurements. Mathematical models of systems for ultrasound phased arrays spatio-temporal characteristics measurements with simultaneous and individual transmission based on traditional method and method of superposition are developed. Measurement errors models of systems for spatio-temporal characteristics measurements are analyzed. Systems for ultrasound linear phased arrays spatio-temporal characteristic measurements with simultaneous and individual transmission are designed for experimental research. The calculation and experimental research of metrological characteristics of the transmission and reception paths of designed systems are done. Comparative analysis between theoretical spatio-temporal characteristics without measurement errors and with measurement errors and experimental spatio-temporal characteristics is done. Uncertainty parameters of ultrasound phased array spatio-temporal characteristics measurements are determined. It is shown that method with individual transmission allows to improve accuracy of spatio-temporal characteristics measurements in comparison to traditional method with simultaneous transmission.