FBG 센서를 이용한 열차 차축 발열 검지 장치 구조설계

초록

When the axle bearing of the railway bogie is damaged or the grease freezes, the excessive friction between the axle and bearing overheats the axle which can induce the derailment of the train. To verify the axle safety on the commercial operation of railway train, it is necessary to monitor the hot box with embedded sensors in real time. In this paper, an axle overheats detection system, which consists of conventional axle box and smart cover embedded with FBG sensors is designed. Axle overheats detection system has abilities to monitor the axle temperature and dynamic strain occurred from the axle bearing fracture. Three types of smart axle box cover are designed such as front elbow coupler type, side hose type and side coupler type. Sensors and optical fiber are located on the predetermined positions engraved inside of the cover and egresses out of the surface through the protection tube.