Research And Design Of Railway Station Equipment Condition Monitoring System Based On LORA

In recent years,with the improvement of the modernization of railway stations,in addition to the elevators and escalators in the station,the equipment that affects the life security of passengers needs to be monitored and maintained,and the gates and ticket vending machines in the station are closely related to passengers.Equipment also directly affects the passenger's travel efficiency and satisfaction,so it is important to accurately and effectively monitor the operating status of the equipments.With the development of wireless communication technology,the wired transmission method of monitoring data has been gradually replaced by a more economical and practical wireless transmission method.Therefore,the academic dissertation studies and designs the monitoring system applied to the status of railway station equipment for the two key technologies of signal acquisition and information transmission in the monitoring system.The system mainly focuses on the function realization of the slave computer,which can accomplish the accurate collection of equipment status signals and reliable transmission by LoRa wireless technology.Firstly,the academic dissertation starts with the equipment and concrete scenarios that need to be monitored at the railway station,and analyzes the functional requirements of the monitoring system.And the academic dissertation also analyzes the method of signal detection and the wireless network scheme that the monitoring system should adopt.Secondly,the hardware system for accomplishing the state signal acquisition and information transmission function of the monitoring system is designed.The signal conditioning circuit of the ADC front-end is designed,and the PCB design and implementation of the whole hardware system except the sensor are completed.Thirdly,according to the characteristics of LoRa technology,combined with the scene of railway station,a "rate-based packetized TDMA" wireless communication strategy is proposed,and the corresponding MAC protocol is designed to complete the protocol migration.Finally,the monitoring system is tested from the hardware system and LoRa wireless transmission respectively,and the test results are analyzed.The results show that the performance of the hardware system and the reliability of LoRa transmission in the station comply with the expected design.The monitoring system can achieve the purpose of monitoring the condition of railway station equipment.The signal conditioning circuit has certain promotion value in improving the anti-noise of weak signal acquisition.The proposed wireless communication strategy has certain innovation.