This chapter discusses some of the sensors and sensing techniques that are commonly used or are under development for monitoring and diagnostics during laser processing. It starts with monitoring of the laser beam itself. This is followed by monitoring of the process, with some of the systems that are discussed also being applicable to seam tracking. The profile or mode of a laser beam can be measured using several techniques: mechanical methods, camera‐based methods, and approximate methods. The beam size can be measured in a number of ways, but the easiest approach uses a Kapton film. The principal parameters that need to be monitored during laser welding, for example, include the weld pool geometry, defects or discontinuities, microstructure, residual stresses, and temperatures. Among the most commonly used sensors for real‐time monitoring are acoustic emission, audible sound, and infrared/ultraviolet detectors, all of which are secondary outputs.
Sensors for Process Monitoring
2023-02-07
30 pages
Article/Chapter (Book)
Electronic Resource
English
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