A Remote Real Time Auto-monitoring System Of Tunnel's Wall Rock Displacement With Laser

Geological disasters of the tunnels such as collapse greatly threaten to workers' safety,affect the quality of the construction and increase the cost, leaving the tunnel's long-term stability being unavailable, the proceeding of monitoring and measurement when the tunnel under construction is a widespread adoptable method of collapse estimate. Aiming at the existing traditional method's disadvantages of the measurement of the displacement of the tunnel's wall rock, we developed a high accuracy, reliable system of tunnel displacement remote real time auto-monitoring with laser, which doesn't affect to the construction.This paper introduces the thinking way of the design, hardware of this system, work process and the installing principle and method in the working tunnel. The remote distributed network system is made up of a piece of PC ,two modems (15km away),a data transferring instrument, many displacement monitoring instrument (front-end apparatus by RS-485 serial BUS) and laser emitters. Intelligent data gathering instrument can supervise and recorder real time multi-channel data. The PC may select and call front-end apparatus' real-time data and recorder data, set all kinds of parameter,assembling data to data transfer instrument by RS-485 serial BUS,and the latter transfer the data to the PC. It also can process the received data, simulate animation, draw curve, compare and analyze data, manage the database ,display diagram and print them out. At the same time, it also can process the data farther to meet the users' detail demands. Finally it introduces the result that the system being put into experiment in Zhejiang province. Things turned out to be very nice and all the requests has been met. As we can see that the system is very useful in the filed which need monitoring and collecting a large amount of data automatically which distributed in different places.Even it can be extended to other domain's tunnels, even in application to mine tunnels after anti-blast amelioration. After improvement, the system can also be put to use in the sites of monitoring the displacement of slopes of dams, holes in the bases, buildings and bridges.