The basic principle of ultrasonic flaw detector

When ultrasonic waves propagate in the material to be tested, the acoustic characteristics of the material and changes in the internal organization have a certain impact on the propagation of ultrasonic waves. The technology of understanding material performance and structural changes through the detection of the degree and status of ultrasonic waves is called ultrasonic testing. Ultrasonic testing methods usually include penetration method, pulse reflection method, tandem method and so on.
Digital ultrasonic flaw detectors usually emit ultrasound to the object under test (such as industrial materials, human body), and then use its reflection, Doppler effect, transmission, etc. to obtain information inside the object under test and process it to form an image.