Abstract: Urban power tunnel has many characteristics,such as diverse structure,small section size,many facilities,large electromagnetic interference and so on.During operation,it is time-consuming and laborious to use traditional measurement method for deformation monitoring,and it is difficult to ensure monitoring accuracy,intelligent monitoring is needed.The application of optical fiber sensing technology has gradually become a new trend in the application of the industry,but the application of optical fiber sensing technology in the deformation monitoring of small section tunnel is rarely seen.In this paper,the design and development of power tunnel automation optical fiber sensing technology of deformation monitoring system based on the results of application show that the system realizes wireless transmission,automation,high precision,real-time data acquisition,analysis and early warning function,which greatly improves the work efficiency,reduce the cost of operation and maintenance,for other similar deformation monitoring with a high demand for application and reference value.

Key words: power tunnel, optical fiber sensor, automation, safe monitoring, system