Non-contact speed encoder
AssigneeOlympus NDT Canada Inc.
InventorsRémi Leclerc, Benoit Lepage, Charles Brillon
Life of this patent
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Abstract
An eddy current (EC) detection system comprises an EC probe including a plurality of sensors to provide corresponding EC response signals; and processing circuitry to evaluate speed of the EC probe based on a measurement of similarity of the EC response signals; determine whether the speed of the EC probe is too fast or two slow based on quality of the measurement; and generate a command to adjust speed of the EC probe during further EC inspection.
Claims25
An eddy current (EC) inspection system comprising:
- an EC probe including a first coil and a second coil to provide corresponding first and second EC response signals;
- and processing circuitry configured to:
- set a time window for analyzing the first and second EC response signals;
- determine a speed of the EC probe based on determining a time delay between the EC response signals based on a maximum of a cross-correlation of a noise frequency pattern of the first and second EC response signals in the time window;
- and
- generate a command to adjust operations of the EC probe based on the speed of the EC probe.
A method for eddy current (EC) inspection, the method comprising:
- acquiring a first and second EC response signals from respective first and second EC coils of an EC probe;
- setting a time window for analyzing the first and second EC response signals:
- determining a speed of the EC probe based on determining a time delay between the EC response signals based on a maximum of a cross-correlation of a noise frequency pattern of the first and second EC response signals in the time window;
- and
- adjusting the speed of the EC probe during an EC inspection based on the determined speed.
A non-transitory computer readable medium including instructions that, when implemented on a processor, cause the processor to perform operations including:
- acquiring a first and second EC response signals from respective first and second EC coils of an EC probe;
- setting a time window for analyzing the first and second EC response signals;
- determining a speed of the EC probe based on determining a time delay between the EC response signals based on a maximum of a cross-correlation of a noise frequency pattern of the first and second EC response signals in the time window;
- and
- adjusting the speed of the EC probe during an EC inspection based on the determined speed.
Dependencies are inferred from the claim text.