Online Measurement for Dimensions of Thermal Train Wheel
This paper presents a method for online measurement of the dimensions of thermal train wheel by one frame of photo-thermal image. A measurement system and its mathematics model is setup. The effect of the spectrum of laser source to restrain thermal background noise is analyzed, then, a special laser is selected. A weighting method of the gray value transform is added into the image process. The high temperature fields of a measured train-wheel are analyzed by use of limited element method. The experiment result shows that the measurement standard deviation of the thermal train-wheel rim is less than 0.55 mm.
Wei Gao, Yasuhiro Takaya, Yongsheng Gao and Michael Krystek
Y. Yang et al., "Online Measurement for Dimensions of Thermal Train Wheel", Key Engineering Materials, Vols. 381-382, pp. 133-136, 2008