PROCESS TOMOGRAPHY USING ULTRASONIC SENSORS

The use of ultrasonic transducers for process tomography is in its inf ancy relative to many other techniques, in particular considering the widespread use of ultrasonic transducers in a variety of non-tomograph ic sensing applications. This review deals with the background sensing principles of ultrasound transducers employed in tomography, their as sociated advantages and their difficulties, including the critical tim e required for data collection, and implications for multiple projecti on tomography. The theoretical and basic practical implementation of t omography systems using ultrasonic transducers is then considered. Fin ally a review is included of research investigations into the use of u ltrasonic-based process tomography systems.