Early Warning System with Real Time Tilt Monitoring

摘要

Remote sensing is becoming popular for real time monitoring of a wide variety of objects and phenomena like assets, structural health, ambient air quality. This paper reports the real-world implementation of a remote sensor system that was employed to monitor the stability of a seawall during repair work using cost effective tilt sensors. The system consisted of custom made remote sensing nodes, providing measurements in real time to a robust backend server that presented the data in the form of an interactive web application. An accelerometer paired with a Wi-Fi chip was sealed in a weatherproof casing to construct the tilt sensors and the data was transmitted back to the server over 4G cellular network for processing. To ensure a quick response should sudden movement be detected, SMS text messages could be dispatched to all parties involved. Four pairs of remote sensors were deployed, each capable of real time monitoring of the wall's angle of inclination to an accuracy of ±0.05°.