System, method, and apparatus for acoustic and magnetic induction thickness inspection of a material on a substrate

A system, comprising:

• an inspection robot having:
• a first plurality of magnetic induction sensors configured to provide electromagnetic (EM) induction data of an inspection surface, wherein at least a portion of the inspection surface comprises a substrate having a coating thereupon,
• a second plurality of ultra-sonic (UT) sensors configured to provide acoustic data,
• a first plurality of sleds comprising a first payload, and
• a second plurality of sleds comprising a second payload,
• wherein:
• each of the first plurality of magnetic induction sensors is mounted to one of the first plurality of sleds and each of the second plurality of UT sensors is mounted to one of the second plurality of sleds,
• the first payload is positioned forward of the second payload, and
• the first plurality of magnetic induction sensors and the second plurality of UT sensors are both distributed horizontally relative to the inspection surface;
• and
• a controller, comprising:
• an acoustic data circuit structured to interpret the acoustic data;
• an EM data circuit structured to interpret the EM induction data, and to determine a substrate distance value in response to the EM induction data;
• and
• a thickness processing circuit structured to determine a thickness value in response to the EM induction data, the acoustic data, and the substrate distance value;
• wherein the thickness value comprises a thickness of the coating.