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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Cheng Yu-hua Lei Kai |
| Copyright Year | 2009 |
| Description | Author affiliation: Dongfang Electric Autocontrol Engineering Co.LTD Deyang Sichuan 618000, China (Lei Kai) || School of Automation Engineering University of Electronic Science and Technology of China Chengdu, Sichuan 610054, China (Cheng Yu-hua) |
| Abstract | A sub-surface imaging method for detecting invisible and buried micro-flaws under fine metallic surface is described. This system, which has a laser source, a CCD camera, and an eddy current exciting device is developed for this work. A pulse generator supplies an intermittent square pulse to induce the exciting coil, which can intensify eddy currents yet reduce the working temperature of the exciting coil and specimens. The magnetic field variation produced by the imbedded defect causes a rotation of the polarization plane of the reflected beam, therefore the reflected beam carries an image of the defect, which is received by a CCD camera. Now the imperceptible flaws in subsurface of mental product are visually tested. Image edge processing approaches are designed to enhance the imaging effect. The method presented is proved to be feasible by the experiment results. |
| Starting Page | 925 |
| Ending Page | 928 |
| File Size | 697642 |
| Page Count | 4 |
| File Format | |
| ISBN | 9781424447947 |
| DOI | 10.1109/ICAL.2009.5262790 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2009-08-05 |
| Publisher Place | China |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Charge coupled devices Coils Polarization sub-surface imaging Temperature Inorganic materials Pulse generation polarized light Optical materials edge detection Magnetic fields Eddy currents Charge-coupled image sensors |
| Content Type | Text |
| Resource Type | Article |
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