Comparison of vertical distance and sliding windows method in brass plated tire steel cord (BPTSC) diameter measurement

Abstract

Nowadays, the researchers are still examining the quality of Brass Plated Tire Steel Cord (BPTSC). The waveform is intentionally made to have a pattern as the base of the winding up of the tiring process. Indonesia Bekaert Company has a standard measurement of BPTSC diameter. The measurement process is manually worked by staff. The problem came on the difficulty of quality detection on BPTSC. One of the standard measurements is the diameter of the BPTSC. In this research, three automatic approaches are proposed, namely vertical distance, minimum sliding window, and average sliding window. These methods are supported by image processing to detect the edge of the image cord. All methods were conducted by modifying the pixel distance theory. The result shows that the vertical distance method has an average difference of about 0.0037 mm compared to manual measurement with no misclassified of BPTSC grade. For the sliding window method, the minimum method has a different value of about 0.0026 mm but with one misclassified grade. The best result for diameter distance is coming from the third method that uses an average of sliding window distances of about 0.0023 mm without misclassified.