Contactless detecting a physical feature of a material

A system for contactless detecting a physical feature of a material through a sensor head and a positioner thereof, the sensor head including at least three position sensors and a scan sensor coupled with each other, the scan sensor having a position requirement relative to the material correlated with a target reflection associated to each of the position sensors, the system comprising:

• the sensor head, the positioner of the sensor head, a scan sensor operator, a position sensors operator, a positioner operator, a positioning looper, an optimizing looper and a feature determiner;
• wherein
• the system is configured to perform, through the positioning looper, a positioning loop with positioning iterations to cause the scan sensor to converge to satisfaction of the position requirement, to verify satisfaction or dissatisfaction of the position requirement and, in case of dissatisfaction, to perform, through the optimizing looper, an optimizing loop with optimizing iterations until an interaction property results optimized corresponding to satisfaction of the position requirement and, once the position requirement is satisfied, to operate, through the scan sensor operator, the scan sensor to irradiate the material and to first sense interaction of said irradiation with the material and detecting, through the feature determiner, the physical feature depending on said first sensed interaction;
• wherein
• each of the positioning iterations includes operating, through the position sensors operator, each of the position sensors to radiate the material and to first sense reflection of said radiation with the material and determining consistency or inconsistency between said first sensed reflection and its associated target reflection and, in case of consistency, quitting the positioning loop and, in case of inconsistency, operating, through the positioner operator, the positioner depending on the determined inconsistency to start new iteration of the positioning loop with the sensor head repositioned;
• and wherein
• each of the optimizing iterations includes operating, through the scan sensor operator, the scan sensor to irradiate the material and to second sense interaction of said irradiation with the material, obtaining the interaction property from said second sensed interaction and determining whether said interaction property is optimized or non-optimized and, if non-optimized, operating, through the positioner operator, the positioner depending on said interaction property to start new iteration of the optimizing loop with the sensor head repositioned and, if optimized, quitting the optimizing loop, operating, through the position sensors operator, each of the position sensors to radiate the material and to second sense reflection of said radiation with the material and updating the target reflections depending on said second sensed reflections.