Model Establishment for Rail Abrasion Degree Measurement Based on Curve Fitting

In order to improve the measuring precision of rail abrasion degree,based on the structural analysis of the rail and the curve fitting principle of least squares,a non-contact detect method was proposed by using eddy current displacement transducers.The mathematical model was set up for the rail abrasion degree measurement through the sensor calibration,the compensation revision model establishment and the actual abrasion calculation.Experimental results indicate that this method can realize the measurement of less than 0.2mm rail abrasion.