Patent ID: 11867663
Assignee: RENISHAW PLC
Field: Measurement (Instruments)
Classification: CPC G  B  Y | IPC B  G

Claim 0:
1. A powder bed additive manufacturing apparatus comprising a build sleeve, a build platform for supporting a powder bed and object during a build, the build platform lowerable in the build sleeve, and at least one acoustic sensing system comprising an acoustic emission sensor and an acoustic waveguide, the acoustic waveguide extending through the build platform such that a receiving end of the acoustic waveguide distal from the acoustic emission sensor abuts a surface of a build substrate releasably mounted to the build platform to transmit structure-borne acoustic waves from the build substrate to the acoustic emission sensor, wherein the acoustic waveguide extends through a channel in the build platform that is open at an upper surface of the build platform such that the acoustic waveguide is able to contact the build substrate when mounted on the upper surface of the build platform.