降雨诱发型滑坡预警系统设计

Design of warning system for rainfall induced landslide

针对现场和非现场滑坡监测现状,设计实现适用于降雨诱发型滑坡灾害预警系统。系统由一个主控单元和多个预设不同倾角阈值的滑坡传感器构成。滑坡传感器埋入可能滑坡的现场,主控单元安装在附近人员家中或工作单位内。滑坡出现时达到倾角阈值,触发滑坡传感器供电并发射无线信号给主控单元,主控单元收到信号后启动声光报警器并发送手机短信给责任人。主控单元采用STM32微处理器和SIM900短信模块实现滑坡地点和责任人信息设置和预警短信发送。系统软件由μC/OS操作系统调度,实现了基于消息邮箱通信的多任务程序设计,采用有限状态机解析短信内容能有效剔除垃圾短信。滑坡传感器只在滑坡出现时供电,解决了传感器长期供电难题。实验结果表明:系统体积小、成本低、实用性强、适用于保护滑坡点附近人员的生命安全。

In allusion to the current situation of monitoring on?and off?site landslide,the disaster warning system for rain?fall induced landslide is designed and implemented.The system is composed of a main control unit and multiple landslide sen?sors with preset different dip angle thresholds.The landslide sensors are embedded in the possible landslide sites and the main control unit is installed in a person′s home or the work unit near the possible landslide sites.When the landslide occurs and it reaches the dip angle thresholds,the landslide sensor is triggered to supply power and send wireless signals to the main control unit.After receiving the signal,the main control unit starts the audible and visual alarm and sends short messages to responsible persons.The STM32 microprocessor and SIM900 short message module is used in the main control unit to realize information set?up of landslide location and for the responsible persons,and send early warning short messages.The system software is sched?uled byμC/OS operating system,to realize multi?task programming based on message mailbox communication.The finite state machine is used to parse the content of short messages,which can effectively eliminate spam short messages.The landslide sen?sors supplies power only when the landslide occurs,which solves the difficulties existing in long?term power supply for the sen?sor.The system has the advantages of small size,low cost,strong practicability,and is suitable for protecting the life safety of people near the landslide point.