基于NB-IoT的电梯安全远程监控系统设计

现代社会电梯的数量不断增加，电梯安全问题逐渐突显出来，对人民的生命财产安全产生威胁。传统的电梯故障解决方法耗时耗力，不但浪费了大量的人力物力，并且维修与保养效率低下，特别是对电梯困人故障的解救时间长，因而成为了电梯的社会问题。针对以上问题，设计了一种基于NB-IoT的电梯安全远程监控系统，实时监控电梯运行状态并即时通知维修人员救援。采用基于Cortex-M3内核的32位低功耗微控制器STM32F103VCT6为主控芯片，实现信号的处理，通信状态机的优化，终端与云端的信息交互等功能；通过NB-IoT无线通信网络，实现电梯运行状态信息采集终端与云端服务器之间的低成本低功耗的信息传输；基于Python和SQL Server开发了云端web服务器及数据库系统，完成电梯故障信息、运行状态信息、维修保养记录等数据在云端的接收、保存、管理和显示。该远程监测系统实现电梯运行状态及故障数据的高效传输，具备同时监控十万台以上数量的电梯的能力，当前已入网电梯1327台。本系统具有实用性强、稳定性高、安全性好、可扩展性优等优点。

Design of Elevator Safety RemoteMonitoring System Based on NB-IoT Wireless Network

With the increasing number of elevators in modern society, the safety of elevator is endangering people''s life. However, the traditional elevator fault solutionis inefficient withthe high cost of manpower and resources, and the time needed for rescuing the trapped personnel is toolong. To solve these problems, an elevator safety remote monitoring system based on NB-IoT is designed to monitor the elevator operation status and call the maintenance person in time.It adopts a 32-bit low-power microcontroller (MCU)with model number STM32F103VCT6.The MCU realizes the information sensing, optimizes the communication, and controls the terminal and cloud information interaction. NB-IoT communication system is applied to satisfy the low-cost and low-power information interaction between the elevator operation status information acquisition terminal and the cloud server.Python and SQL Server are utilized for constructing the Web Server and database system, which receives, saves, manages and displays the fault information, running status, maintenance records and others. The remote monitoring system has the ability to monitor more than 100,000 elevators simultaneously, and currently has linked 1327 real running elevators. The proposed system has the advantages of strong practicability, high stability, good security and excellent expansibility.