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US 2014/0109675 A1Published application
Ultrasonic testing instrument with dithery pulsing
AssigneeOlympus NDT
InventorsPierre Langlois, Benoit Cournoyer
Life of this patent
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Abstract
Disclosed is an ultrasonic device optimized with both averaging and dithery pulsing techniques. The averaging technique significantly removes white noise; on the other hand, the dithery pulsing significantly removes acoustic noise, which is otherwise accumulated during conventional averaging processes.
Claims20
A non-destructive inspection or testing (NDT/NDI) device configured for inspecting a test object, comprising:
- a probe configured for pulsing a test object during a testing cycle at a testing location with N pulses to produce and receive N sets of wave responses, and to produce therefrom N sets of electric echo signals;
- at least one analog to digital converter configured to digitize the N sets of echo signals and to produce therefrom N sets of digitized signal samples, which correspond respectively to N sets of acquired signal samples and N sets of noise signal samples;
- a digital logic device, having a data processing unit configured to execute an averaging process by which the N sets of signal samples are summed and averaged to produce a final testing result;
- wherein the digital logic device further comprises a pulser control unit configured to control the pulsing according to a dithery pulsing sequence by which the probe is pulsed in a dithery pattern between one pulse and another so that the combination effect of the N sets of the noise signal samples is decimated during the averaging process and in the testing result.
1 more element
A method of pulsing a non-destructive inspection or testing (NDT/NDI) device having a probe configured for pulsing a test object during a testing cycle, the method comprises the steps of:
- pulsing the probe with N pulses according to a pulsing sequence,
- causing the probe to receive N sets of wave responses, and to produce therefrom N sets of electric echo signals;
- digitizing the N sets of echo signals to produce N sets of digitized signal samples, which correspond respectively to N sets of acquired signal samples and N sets of noise signal samples;
- averaging said N sets of acquired signal samples;
- wherein the pulsing sequence has a dithery pattern between one pulse and another so that the combination effect of the N sets of the noise signal samples is decimated during the averaging step and in the testing result.
2 more elements
Dependencies are inferred from the claim text.