Fire early warning system of bus engine compartment self-igniting

DONG Hong-zhao， ZHANG Fei， JI Xing-jian
（College of Mechanical Engineering， Zhejiang University of Technology， Hangzhou 310014， China）

Abstract： Aiming at the exist problem of warning the bus engine compartment self-igniting，a two-stage early warning system（EWS）based on CAN technology was designed. The hardware structure and the software structure of the vehicular EWS sensor network in this system were developed. The experimental platform，including a two-stage EWS，a roadside infrastructure module and an information management system PC，was established. Meanwhile，the function of judging fire and its displaying was realized，the connection between the vehicular sensor system and the roadside infrastructure，the PC and the roadside infrastructure was achieved，too. System debugging result indicates that， two slave nodes collect，upload and process a frame data in every second； the two frame data can be processed and the danger can be warned in one second by the master node. Every frame data sent from the master node can be saved into database steadily by the PC. The two-stage EWS is verified very stable and reliable.
Key words： bus self-igniting； fire early warning system（EWS）； controller area network（CAN） bus； controller area network（CAN）； node