Design of laser ultrasonic system for in-process weld penetration monitoring and control

摘要

Ultrasonics is a widely used nondesftructive testing technique, which is often applied off-line for weld quality inspection. Laser ultrasonic (LU) inspection systems have the potential for on-line application, providing the means to identify unacceptable welds as they are formed. Because LU systems are non-contacting, they can be used for testing moving specimens or for operation in hazardous and/or high temperature environments.