A Novel Method for Laser Peak Detection with Subpixel Accuracy for the Rail Corrugation Measurement

<table class="table-group" id="tab5"><tr><td><table class="table"><tr><td class="thead-hr" colspan="3"><hr/></td></tr><tr class="thead"><td class="align_left" rowspan="2">Corrugation measurement</td><td class="align_center" colspan="2">Error (mm)</td></tr><tr class="thead"><td class="align_center">Wavelength</td><td class="align_center">Amplitude</td></tr><tr><td class="thead-hr" colspan="3"><hr/></td></tr><tr><td class="align_left">Center of gravity method</td><td class="align_center">±0.19</td><td class="align_center">±0.009</td></tr><tr><td class="align_left">Center of gravity method after filtering</td><td class="align_center">±0.17</td><td class="align_center">±0.008</td></tr><tr><td class="align_left">Proposed method</td><td class="align_center">±0.11</td><td class="align_center">±0.005</td></tr><tr class="table-tr"><td colspan="3"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Result of 40 tests on 4 different samples manufactured by CNC machine to simulate the corrugation of the rail (with wavelength of 5 and 10 cm and amplitude of 50 and 100 micrometer).</div>

Journal of Sensors

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Table 5

Table 5: A Novel Method for Laser Peak Detection with Subpixel Accuracy for the Rail Corrugation Measurement 