US 11,953,468 B2
Apparatus, method and computer program for detecting defects
Christopher Wright, London (GB); Phil Catton, Cambridge (GB); and Wai Lau, London (GB)
Assigned to Nokia Technologies Oy, Espoo (FI)
Filed by Nokia Technologies Oy, Espoo (FI)
Filed on Jun. 16, 2021, as Appl. No. 17/349,341.
Claims priority of application No. 20183444 (EP), filed on Jul. 1, 2020.
Prior Publication US 2022/0003720 A1, Jan. 6, 2022
Int. Cl. G01N 29/12 (2006.01); G01N 29/04 (2006.01); G01N 29/06 (2006.01); G06F 18/214 (2023.01)
CPC G01N 29/12 (2013.01) [G01N 29/043 (2013.01); G01N 29/0609 (2013.01); G01N 29/069 (2013.01); G06F 18/214 (2023.01)] 20 Claims
OG exemplary drawing
 
1. An apparatus, comprising:
at least one processor; and
at least one non-transitory memory storing instructions that, when executed with the at least one processor, cause the apparatus to:
determine control parameters of one or more electroacoustic transducers using a finite element analysis of a model of a device;
control the one or more electroacoustic transducers of the device to create a standing wave based on the finite element analysis of the model of the device, the standing wave having a displacement antinode at an expected location of a component of the device;
receive a signal representing sound generated with vibration of the component driven with the standing wave; and
cause analysis of the signal to determine whether there is a defect based on whether the signal represents a sound that is the same as a result from vibration of the component driven with the standing wave in an absence of a defect.