Patent ID: 11964435
Assignee: NANYANG TECHNOLOGICAL UNIVERSITY
Field: Measurement (Instruments)
Classification: CPC B  G  Y | IPC B  G

Claim 19:
20. An additive manufacturing system configured to perform a powder bed process, the additive manufacturing system comprising:
a build platform;
a powder feeder configured to dispense powder on the build platform during the powder bed process;
a powder re-coater comprising a powder re-coater arm configured to form a powder bed layer on the build platform based on the powder dispensed on the build platform from the power feeder; and
a system for monitoring the powder bed process in additive manufacturing, the system comprising:
a first contact sensor;
a memory; and
at least one processor communicatively coupled to the memory and the first contact sensor, and configured to:
obtain a first image of the powder bed layer from scanning the powder bed layer in a first scanning direction using the first contact image sensor, the powder bed layer being formed by the powder re-coater arm in the powder bed process and the first contact image sensor being attached to the powder re-coater arm;
determine a focus level property of the first image; and
detect non-uniformities in the powder bed layer based on the focus level property of the first image.