Research And Realization On Automatic Guidance System Of Tunnel Boring Machine

The task is from the National 863 project --the Research and the Demonstrating Application of the Tunnel Boring Machine's (TBM) Assistant System and Guidance Technology. The research in this article are some of the main technology about guidance system of TBM. The details are as following: The main task of guidance system was researched after we discussed the actuality of tunnel measure . Than we knew the importance of developing the TBM's guidance system. The basic knowledge about TBM and theory of tunnel measurement were researched. After we compared some type of guidance systems ,we choosed method of our guidance system. The main technique of guidance system is how to measure the position and pose of TBM. By comparing the results of measurement with values of DTA ( Designed Tunnel Axis ), we can find the position offset and angle offset of TBM. We expounded some problems about how to attain the position and pose of TBM and how to compare the values with DTA. How to control the theodolite with computer is very important in the system. We discuss this problem and bring forward a plan to deal with it. It is integrant to analyse the precision of equipments and arithmetic than we can insure that the precision can be accept. We discussed some factors which affect the precision of guidance system. This guidance system has been successfully applied in the project of Shanghai, which has greatly increased the efficiency and the project's quality.