An Advanced Vision System for the Automatic Inspection of Corrosions on Pole Tips in Hard Disk Drives

Author

Yammen, Suchart ; Muneesawang, P.

Author_Institution

Dept. of Electr. & Comput. Eng., Naresuan Univ., Phisanulok, Thailand

Volume

4

Issue

9

fYear

2014

fDate

Sept. 2014

Firstpage

1523

Lastpage

1533

Abstract

Pole tips of hard disk drives are made of FeCo film, which is prone to corrosion due to the corrosive nature of the environment and wide range of pH experienced during the production. A machine vision system is utilized for the automatic auditing of corroded pole tips. This comprises three steps: 1) extraction of the top shield region; 2) fusion of extracted features; and 3) decision making. This model is capable of detecting corrosion in the critical part of the pole tips. The experiments show that the proposed system detects corrosion with high accuracy, whereas the overall processing time meets industrial requirements.

Keywords

automatic optical inspection; cobalt alloys; computer vision; corrosion; decision making; disc drives; feature extraction; hard discs; inspection; iron alloys; metallic thin films; pH; production engineering computing; FeCo; FeCo film; advanced vision system; automatic auditing; automatic inspection; corroded pole tips; corrosion detection; decision making; feature extraction; hard disk drives; industrial requirements; machine vision system; pH range; shield region; Corrosion; Feature extraction; Inspection; Machine vision; Materials; Visualization; Defect detection; hard disk drives (HDDs); improved median filter; pole tips; visual inspection;

fLanguage

English

Journal_Title

Components, Packaging and Manufacturing Technology, IEEE Transactions on

Publisher

ieee

ISSN

2156-3950

Type

jour

DOI

10.1109/TCPMT.2014.2334691

Filename

6862853