Ultrasonic inspection (ULTRASONIC INSPECTION) as a way to check without destruction. For the parts with thickness. And there are flaws in the workpiece. Based on the principle of sound wave frequency to send more than 20 000 Hz,, Which man cannot hear loud say (usually the ears of the people will be able to listen to the noise in the frequency, wave 20-20 000 Hz), which sound waves. This ULTRASONIC features through a solid medium and liquid. But will not pass and reflection in the media as air. Therefore, it relies on such principles ในนำมาใช้ in checking out the flaws. Because the markings will be as air gap. The sound wave reflection back to the receiver. And the process is information to the tested For monitoring the waves of this ULTRASONIC originally displayed in the screen. Will come out in the form of a signal line, also known as A-Scan which need to use the. Specializing in the use of tools, and interpret the signal to distinguish a flaw or, if the test is experienced in check. May cause confusion to distinguish the signal. In the next to the change. There have been changes the display is to see more. The show pictures in the form of SIDE VIEW we call B-Scan and performances in the form of a TOP VIEW which is popular in to investigate the composite material. Called C-Scan which monitors can look more obvious, however, display the three แบบก็ have some limitations in interpretation of the display. Is unable to measure out the size and location of flaws. At the same time. It also has limitations in the detection area near the surface, which the head check used to have airless (DEAD ZONE) do not examine the surface and beneath the surface slightly. The sensor is also the head check ELEMENT. Is one piece so in ใกล้การ pass sound waves are disorganized and interfere with each other. Therefore, there is the research and development to reduce the limitations thereof. Until the police techniques that can obliterate the limitations as a trick.
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