Data Acquisition for Steel Defect Detection Using Continuous Wavelet Transform
Romi Wiryadinata, Hendi Afriyan, Ceri Ahendyarti, Rocky Alfanz, Teguh Firmansyah
University of Sultan Ageng Tirtayasa
Abstract
Non-Destructive Testing Ultrasonic is needed for structural testing in steel, testing is carried out to determine the condition of damage or hole defects due to corrosion and long-term use. The aims of this research to create a data acquisition system using Continuous Wavelet Transform and the results of the acquisition data are used to find the position of hole defects in steel. The part of data acquisition were pulse generator and amplifier. The signal from the pulse generator is used for input on an ultrasonic transducer with an amplitude of 60 Volts, a PRF of 1 kHz, and a pulse width of 1 micro second. Meanwhile, the gain in the low noise amplifier is 28 dB, its function as a signal receiver from an ultrasonic transducer. The output signal from the ultrasonic transducer is processed using CWT to obtain the coefficient of approximation. The position of hole defects is based on the delta wave from the initial pulse and echo. therefore, hole defects are indicated by a reflection wave defect. The acquisition system in this study was able to identify the location of hole defects in steel. The average depth can be detected by 0.79 cm with an error of 0.244 percent.
Keywords: Data Acquisition, Steel Defect Detection, Continuous Wavelet Transform
Topic: Mechanical Engineering