Apparatus, method and computer program for detecting defects
AssigneeNokia Technologies Oy
InventorsChristopher Wright, Phil Catton, Wai Lau
Life of this patent
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Abstract
According to various, but not necessarily all, embodiments there is provided an apparatus comprising means for: controlling one or more electroacoustic transducers of a device to create a standing wave having a displacement antinode at an expected location of a component of the device; receiving a signal representing sound generated by vibration of the component driven by the standing wave; causing analysis of the signal to determine whether there is a defect based on whether the signal represents a sound that would be expected to result from vibration of the component driven by the standing wave in the absence of a defect.
Claims20
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.
A method, comprising:
- determining control parameters of one or more electroacoustic transducers using a finite element analysis of a model of a device;
- controlling 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;
- receiving a signal representing sound generated with vibration of the component driven with the standing wave;
- and
- causing 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.
A non-transitory program storage device readable with an apparatus, tangibly embodying a program of instructions for performing at least the following:
- determining control parameters of one or more electroacoustic transducers using a finite element analysis of a model of a device;
- controlling 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;
- receiving a signal representing sound generated by vibration of the component driven with the standing wave;
- and
- causing 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.
Dependencies are inferred from the claim text.