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Sensors 2008, 8(8), 4866-4877; doi:10.3390/s8084866
Article

A Fast Inspection of Tool Electrode and Drilling Depth in EDM Drilling by Detection Line Algorithm

Received: 1 July 2008; in revised form: 12 August 2008 / Accepted: 15 August 2008 / Published: 21 August 2008
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Abstract: The purpose of this study was to develop a novel measurement method using a machine vision system. Besides using image processing techniques, the proposed system employs a detection line algorithm that detects the tool electrode length and drilling depth of a workpiece accurately and effectively. Different boundaries of areas on the tool electrode are defined: a baseline between base and normal areas, a ND-line between normal and drilling areas (accumulating carbon area), and a DD-line between drilling area and dielectric fluid droplet on the electrode tip. Accordingly, image processing techniques are employed to extract a tool electrode image, and the centroid, eigenvector, and principle axis of the tool electrode are determined. The developed detection line algorithm (DLA) is then used to detect the baseline, ND-line, and DD-line along the direction of the principle axis. Finally, the tool electrode length and drilling depth of the workpiece are estimated via detected baseline, ND-line, and DD-line. Experimental results show good accuracy and efficiency in estimation of the tool electrode length and drilling depth under different conditions. Hence, this research may provide a reference for industrial application in EDM drilling measurement.
Keywords: Electrical discharge machining (EDM); Electrode length; Drilling depth; Detection line algorithm (DLA); Peak decision method. Electrical discharge machining (EDM); Electrode length; Drilling depth; Detection line algorithm (DLA); Peak decision method.
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Huang, K.-Y. A Fast Inspection of Tool Electrode and Drilling Depth in EDM Drilling by Detection Line Algorithm. Sensors 2008, 8, 4866-4877.

AMA Style

Huang K-Y. A Fast Inspection of Tool Electrode and Drilling Depth in EDM Drilling by Detection Line Algorithm. Sensors. 2008; 8(8):4866-4877.

Chicago/Turabian Style

Huang, Kuo-Yi. 2008. "A Fast Inspection of Tool Electrode and Drilling Depth in EDM Drilling by Detection Line Algorithm." Sensors 8, no. 8: 4866-4877.


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