Hardware Development of Reflection Mode Ultrasonic Tomography System for Monitoring Flaws on Pipeline

Abstract

The pipeline inspection is a key requirement to maintain structural health and pipeline integrity for oil and gas transportation over countries. Pipe failure is a critical problem that needs to be endured within the operational work. The defects or flaws existence on pipeline surface is one of the most leading factors to pipe failures. A new approach of non-destructive technique is implemented to monitor flaws on pipeline by using reflection-mode ultrasonic tomography system. This paper details on the hardware development of ultrasonic tomography system based on reflection mode detection. The system consists of ultrasonic transceiver sensors mounted circularly and contactless to the pipe surface. The modeling work described the ultrasonic ring configuration, ultrasonic signal behavior, sensors arrangement and image grid estimation. The developed instrumentation system is used to detect external and internal flaws on pipe surface. The results show that the reflection-mode ultrasonic tomography is capable to differentiate flaws detected based on the calculated depth verified from the distance measured and through the reconstructed image.

Ultrasonic Transmission Tomography Sensor Design for Bubble Identification in Gas-Liquid Bubble Column Reactors

“…There are three sensing modes: transmission, reflection and diffraction mode [25]. Transmission mode and reflection mode are the most commonly used modes in UT systems, and they are usually referred to as ultrasonic transmission tomography (UTT) and ultrasonic reflection tomography (URT), respectively [26,27,28]. In 1996, Hoyle discussed the basic principles and advantages and disadvantages of using ultrasonic sensors for tomography, and presented the hotspots and difficulties that may be studied in the future of UT systems [29].…”