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Method and arrangement for crack detection in a metallic material
US9103802B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9103802-B2 |
| Application number | US-201213632779-A |
| Country | US |
| Kind code | B2 |
| Filing date | Oct 1, 2012 |
| Priority date | Sep 29, 2011 |
| Publication date | Aug 11, 2015 |
| Grant date | Aug 11, 2015 |
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Abstract
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A method of determining a crack depth of a crack in a metallic material including the steps: feeding a current with a first magnitude to a transmitter coil for generating a magnetic field in the metallic material; controlling the current such that it obtains a second magnitude when the magnetic field is estimated to have penetrated deeper than a deepest crack depth desired to be measured in the metallic material; detecting the magnetic field by means of a receiver coil; determining a first characteristic value of the signal in a first time range; determining a second characteristic value of the signal in a second time range after the first time range; and determining a possible presence of a crack and its crack depth based on the first characteristic value and the second characteristic value.
First claim
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What is claimed is: 1. A method of determining a crack depth of a crack in a metallic material, the method comprising: feeding a current with a first magnitude to a transmitter coil for generating a magnetic field in the metallic material, controlling the current such that it obtains a second magnitude when the magnetic field is estimated to have penetrated deeper than a deepest crack depth desired to be measured in the metallic material, detecting the magnetic field by means…
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- G01N27/9046Primary
Physics · mapped topic
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- What does patent US9103802B2 cover?
- A method of determining a crack depth of a crack in a metallic material including the steps: feeding a current with a first magnitude to a transmitter coil for generating a magnetic field in the metallic material; controlling the current such that it obtains a second magnitude when the magnetic field is estimated to have penetrated deeper than a deepest crack depth desired to be measured in the…
- Who is the assignee on this patent?
- Linder Sten, Thegel Lennart, Abb Technology Ag
- What technology area does this patent fall under?
- Primary CPC classification G01N27/9046. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Aug 11 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).