광섬유 FBG센서를 이용한 운행열차의 윤중 측정

초록

Railway bogie consists of wheel, bogie frame, 1st and 2nd suspension, braking system, electric system and mechanical system which plays a braking and transition role of the train. When some components attached on the bogie drop or the air spring is damaged on operation, the derailment of the train can occur. To prevent the sudden accident, real time wheel weight monitoring system is required. In this research, wheel weight was monitored using FBG sensor attached on the left and right rail. FBG sensors which have different wavelength were united into one line using multi-flexing technique. Train operated 4 times repeatedly under 20km/h speed, and each wheel weight was measured with 500Hz. An average error of the wheel weight was 4.4%. In this experiment, signal was acquired without any electromagnetic noise due to the mechanical property of the optical fiber. Wheel weight error was brought from the surface irregularity of the wheel and ballast effect at the measurement position. From this result, we could verify the possibility to adopt real time wheel weight monitoring system using FBG sensor.