It designed the instrument for the wheel tread defect by using the EMAT and surface wave technology,and using the DSP+CPLD structure which realized the data analysis and logical function.

The digital camera is used as the picture collection system, with such measures as computer picture processing, optimum measurement position selection and system error rectification, the measurement precision for wheel flange height, wheel flange thickness and tread wear reaches 0 1 mm, and the non contact measurement of wheel set tread parameters and the intelligent data processing are realized.

Prognostics for surface scrapes on wheels based on integrated rough neural network;

The subtraction algorithm of pattern recognition is proposed for detecting the wheel tread wear of trains.

Wheel tread wear is one of the main causes that threaten safety of trains,a kind of method is put forward,which is the subtraction of pattern recognition applying in the wheel tread wear of trains.