Researches On Wireless Data Acquisition System Of Tunnel Structure Safety Monitoring

Considering the projects of tunnel glowing, and the safety of tunnels being particularly important that impact on developing transport, but also concern with people's lives and property safety, so we have to establish a safety monitoring system of tunnel structure. This system makes the tunnel structure in real-time remote monitored to grasp the information of tunnel surrounding rock changes. It is a crucial to ensure structural safety of tunnel and avoid occurrence of accidents.According to the acquirement of actual tunnel, firstly the author analysized the geological conditions of tunnel surrounding rock to determine measured objects including to pressure of tunnel surrounding rock and strain of steel supporting and choose corresponding to stress-strain sensor, then present the implement scheme of safety monitoring system of tunnel structure in this paper. A GPRS-based wireless data acquisition system is designed and developed by the sensor monitoring technology combining with wireless network communication technology in this scheme. System includes sensors monitoring unit, F/V converter, data acquisition and storage unit, wireless transmission unit and software of corresponding modules. Finally, system debugging and testing are carried out to validity the design goal. The results of experiment show that data acquisition system is able to collect, storage,display and wireless transmission data, to meet system design requirements perfectly.Wireless data acquisition system of tunnel structure is presented in this article. It not only improves automation level of the tunnel structure monitoring, but save amount of man power and material resources. The system is important guarantee for the safe tunnel construction and long-term reliable operation, as well as an example provided for the other bridges and tunnels structure of data acquisition system accumulating experience.