Implementation of Ultrasonic Tomography of Scatterers Based on a Circular Array

Abstract

A new implementation of an ultrasonic tomography system was proposed, which consists of a circular sensor array, in which transmitters and receiver are placed on a circumference of a circle in one plane, and the imaged objects are placed inside this circle. The number of transmitting and receiving elements are 32, 64 respectively. The return problem (image reconstruction) are implemented using matched filter method. The used sensing signal was a linear frequency modulation signal with frequency range of 38-43 kHz. The image of three different shape objects was reconstructed using the implemented system in the air medium. The results confirm the possibility of using the proposed distribution of sensors and the matched filtering method to recover the images of the scatterers.