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Automatic Scratch Detector for Magnetic Disk |
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| รหัสดีโอไอ | |
| Creator | Achinee Polsawat |
| Title | Automatic Scratch Detector for Magnetic Disk |
| Contributor | Apirat Siritaratiwat |
| Publisher | Faculty of Engineering Mahasasakham University |
| Publication Year | 2564 |
| Journal Title | Engineering Access |
| Journal Vol. | 7 |
| Journal No. | 2 |
| Page no. | 89-92 |
| Keyword | light reflection, scratch detection, magnetic disk |
| URL Website | https://ph02.tci-thaijo.org/index.php/mijet/index |
| Website title | THAIJO Engineering Access |
| ISSN | 2730-4175 |
| Abstract | The development of an automatic scratch detector for a magnetic disk aims to detect scratches on magnetic disk surface at the micrometer level. In hard disk manufacturing industry, it is vital to focus on hard disk quality checking. [Every piece is scrutinized, especially a magnetic disk inspected for scratches. They are occurred during industrial manufacturing processes and by read/write head devices. It may affect data storage performance of magnetic disk.] In this study, scratch detector is operated by reflective method, using the principle of laser reflection (Laser). The beam is sent to disk surface and reflected to photo diode, which is a light receiver. It is found that when the intensity of laser beam received by photo diode reflect on scratched and non-scratched area differently. Light intensity is decreased when it reflects on scratched area. The signal amplitude is between 2.1 - 4.3 volts. It is indicated that the magnetic disk surface is scratched. Finally, it revealed that width of scratch magnetic disk measured by Stereo Microscope (SM) was 30 micrometers in a micrometer scale. |
