The topic is the study ultrasound in detecting internal defects Plate on the application. Specific design of the mechanical equipment and control circuit system, Ultrasonic testing to achieve automation and manual control, the detection system can achieve the flexibility.
In this paper, based on the characteristics of Ultrasonic direction, and high-energy, the penetration capability and can interface on a refraction, reflection and ultrasonic wave conversion and the sound of the human body, so the use of ultrasound to detect defects within the plate. Then under the transmission method to determine the way the support of the probe. Ultrasonic testing equipment, including the mechanical structure of the two main testing platform, two rectangular screw, four rails and the probe clamping device. Mechanical design of the structure is mainly used to provide power stepper motor, drive two test platform driven probe devices X, Y two directions of sampling, testing with the trajectory. And the stepper motor rotation by external pulse control . as well as important parts of a hinge and Selection, so that the force structure is uniform and reasonable structure. According ultrasonic detection of movement, the control circuit design system using the manual and automatic way to control the computer issued pulse signal, After another drive step motor to control the direction of movement and turning, and using computers to analyze probe-back information to identify defects of. The system has detected positioning precision, simple operation and less time-consuming features.
Keywords:Ultrasonic Inspection;Pulse;Control of Step Motor