Optical Sensor for Rail Wheel Contact Forced Vibration Measurement

In rail-transit, the pleasure of journey is deeplyvalued. Trainfrequency has increased in this era, and in order to meet public demand, structural health monitoring of railways has drawn all railway engineers together. The issue of stress and strain created in rails is caused by the rise in axle loading and the acceleration of oflocomotives. theforces applied to the wheel rail contact point on the track is the main factor to be considered as the speedincreases. Theforce changes in accordance with the speed of the train. The force applied to the track is measured in terms of strain and stress using an optical fibre based on fibre Bragg grating. A grating Mod tool then simulates these measured values to demonstrate the variation in wavelength shift in the sensor for various frequency ranges. The laboratory based roller rig setup is used for this experiment.