A system is disclosed for monitoring and controlling laser cladding process by
powder injection in real-time. The invention combines laser cladding technique
along with automated direct feedback control to achieve a good quality clad in
terms of dimensional and metallurgical characteristics. The system uses optical
CCD-based detectors as the feedback system. The optical CCD-based detectors along
with a pattern recognition algorithm is used to determine the clad characteristics
in real-time. These characteristics are clad's dimensions, solidification rate,
and roughness that are fed into a closed loop control system to adjust the laser
power and table velocity to produce desired clad quality.