Fast Ultrasonic Testing Technology of Steel Plate Based on Drum Structure

Abstract

Aiming at the situation that it is difficult to automate the detection of steel plates on site, and manual ultrasonic testing has low efficiency and poor reliability, an ultrasonic fast testing technique for the steel plates was proposed. Adopting the multi-Gaussian beam theory and combined with the characteristics of multiple layers of the interface of the drum structure, relying on analysis and simulations of sound field in the steel plates, effective inspecting area of each transducer was determined accordingly, and the ultrasonic detection technology of the steel plate based on the drum structure is studied. Ultrasonic inspection tests were carried out for defects of different depths inside the steel plate. The experimental results show that the structure can effectively detect defects of Φ5 mm flat bottom hole equivalent in the range of 20–100 mm under the steel plate, which provides a reference for the manufacture of rapid detection equipment for steel plates.