Principle of Ultrasonic Detection Laser Pointer System

Sonic testing is a common method in non-destructive testing, and it is also a commonly used testing method for welding quality. Most of the ultrasonic testing is to characterize the internal distribution characteristics of the workpiece by detecting the transmission intensity or reflection intensity of the ultrasonic wave after passing through the workpiece to be tested, and to determine the welding quality of the workpiece. A calibration device for the relative position of a laser pointer and an ultrasonic probe, the calibration device includes: a measuring tank of an ultrasonic testing equipment, an ultrasonic probe, a signal generator, a moving mechanism, a laser pointer, and a calibration sample, wherein: the calibration sample is fixed on In the measuring tank of the ultrasonic testing equipment; the ultrasonic probe is connected to a signal generator; the signal generator transmits a pulse signal to the ultrasonic probe, and the pulse signal is converted into an ultrasonic signal through the conversion action of the ultrasonic probe, and reaches the calibration sample through the coupling medium The laser pointer and the ultrasonic probe are fixed on the moving mechanism, and the laser pointer is used to determine the position of the center of the calibration sample.