To reduce the safety risk in the tunnel,a safety monitoring system for the tunnel protective door is designed,which includes three parts:data acquisition,data processing and transmission,and data display.At the data acquisition end,STM32F407 minimum system board is used as the central acquisition card,and peripheral sensors are added to collect the data of door vibration,attitude,temperature and wind pressure,and the data is sent to MQTT server through MQTT protocol through Wi-Fi module.The monitoring platform stores,analyzes and displays the received data.This system can comprehensively monitor the relevant information of the protective door body,and the system has certain expansibility,which can give early warning for the safety hidden danger of the tunnel protective door,thus ensuring the safety inside the tunnel.
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