analysis and identification of defects

Dear all,

Maganet surface defects should be identified and analysed. The hard part is the contrast between the default and the other part of the magenets is very low.

Here is a picture, and the defect of shallow long tooth has a dynamic range of comments [65,75].

It is very difficult to get the default zone information because it is very difficult to distinguish from its exterior.

Does anyone have some good ideas?

Waiting...

If defects have to be straight, try IMAQ find Straight Edge, refer to this topic, don't forget to watch the picture posted near the end.

http://forums.NI.com/NI/board/message?board.ID=200&message.ID=17643#M17643

You can also try darkfield lighting (low obliqe angle) to accentuate the defect.

Another alternative-place some of this thin green plastic (forget the correct name of the trade) that shows the lines of magnetic field on the magnet and the image only. Areas of defect should appear very prominetly.

-AK2DM

Tags: NI Hardware

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