Sensor fusion with eddy current sensing

A system for powder bed additive manufacturing, comprising:

• an eddy current (EC) sensor array configured to obtain an EC sensor measurement;
• a secondary sensing subsystem configured to sense a powder bed to obtain a topographical measurement;
• and
• at least one processor;
• and
• at least one memory,
• wherein the at least one memory stores instructions that, when executed by the at least one processor, cause the at least one processor to determine a property in the powder bed based on the EC sensor measurement and the topographical measurement.

A method for powder bed additive manufacturing, comprising:

• sensing in a powder bed with an eddy current (EC) sensor to obtain an EC sensor measurement;
• sensing in the powder bed with a secondary sensor to obtain a secondary measurement;
• and
• modifying the EC sensor measurement based on the secondary measurement.

A system for calibrating an eddy current (EC) sensor array for monitoring a powder bed during an additive manufacturing, comprising:

• a first sensing subsystem, comprising:
• at least one eddy current (EC) sensor arrays;
• a second sensing subsystem;
• and
• a correlating subsystem, comprising:
• at least one processor,
• wherein EC sensor measurements captured by the first sensing subsystem and a topographical map generated by the second sensing subsystem are correlated by at least one processor of the correlating subsystem and used to calibrate at least one sensor of the EC sensor array.

A sensor fusion system for additive manufacturing (AM), comprising:

• an eddy current (EC) sensor configured to sense in a powder bed to obtain an EC sensor measurement;
• a secondary sensor configured to sense in a powder to obtain a secondary measurement;
• at least one processor;
• anda
• at least one memory storing instructions that, when executed by the at least one processor, cause the processor to modify the EC sensor measurement based on the secondary measurement.