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A railway wheelset is subject to normal wear due to large part to friction contact between the wheelset and the rail. Because the wear of wheelset will bring the hidden security troubles to the operation of the railway, it is very important to measure the wheelset's geometrical parameters, especially the flange thickness. The optoelectronic method is proposed and can dynamically measure the flange...
The diffraction methods were used to measure thin wires or fibers with some advantages. The method was based on Fraunhofer diffraction principle. The diffraction pattern can be detected by the Charge Coupled Device (CCD). CCD often produced the noise in the diffraction pattern and gave rise to the measuring error for the ambient disturbance. After theoretical simulation and analysis, the wavelet analysis...
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