Design and application of geological disaster monitoring system based on IoT and weak-reflection fiber grating array
China is one of the countries with the most types of and the most serious geological disasters in the world.Rain-fall monitoring and deformation monitoring play an increasingly important role in geological disaster monitoring,so it is particu-larly important to ensure the long-term operation of the geological disaster monitoring system and its stable operation during rain-fall.In view of the above,this paper designs an IoT data acquisition control board on the basis of the microcontroller STM32,LORA module and 4G module,and develops a rainfall intelligent monitor and a crack displacement intelligent monitor by com-bining piezoelectric rain sensor and drawstring displacement sensor.A weak-reflection fiber grating geological disaster monitoring system is constructed in combination with the IoT data acquisition control board and weak-reflection fiber grating array sensing technology,so as to realize the regular monitoring of geological disaster body and the automatic monitoring during rainfall.Fi-nally,the rainfall intelligent monitor,the crack displacement intelligent monitor and the weak-reflection fiber grating geological disaster monitoring system are applied to the monitoring experiment of the landslide and collapse of Xinchang Railway Station in Dahe Town,Tongzi County.The monitoring data show that the displacement changes of the No.41 weak-reflection fiber grating sensing section is up to 5 mm measured by the weak-reflection fiber grating monitoring system,and the displacement monitor nearby also detected the displacement changes.Therefore,the system can effectively realize the regular monitoring of geological disasters and automatic monitoring during rainfall.
万方数据
维普
