Patent ID: 11913839
Assignee: NATIONAL TECHNOLOGY & ENGINEERING SOLUTIONS OF SANDIA, LLC
Field: Materials, metallurgy (Chemistry)
Classification: CPC B  G  Y | IPC B  G

Claim 8:
9. A thermal monitoring apparatus for use with a metal additive manufacturing system, the thermal monitoring apparatus comprising:
an emissivity determination component configured to determine an emissivity value, the emissivity value determined based, at least in part, on an arithmetic product of a predetermined roughness value and a predetermined slope-related value, wherein the predetermined roughness value and the predetermined slope-related value are predetermined based, at least in part, on measurements of a surface of a previously manufactured object manufactured by the metal additive manufacturing system; and
an infrared sensor, coupled to receive the emissivity value, configured to detect infrared radiation from at least a portion of a top surface of a metal object to be manufactured,
wherein the thermal monitoring apparatus determines a temperature of the top surface of the object to be manufactured based, at least in part, on the detected infrared radiation and the emissivity value, and applies the temperature to a temperature utilization component of an additive manufacturing system.