The Development Of Road Survey Design Construction System Based On RTK Control Terminal

In recent years, as the rapid development of China’s economy, there are more and more roads of different levels and various kinds. However, the road survey work mode has hardly ever changed. We still adopt the old mode, that is, the field collect and inner design. But field collection takes a lot of time and energy. While the modification and survey of office design are not realistic. This will lead to constant modification blindly. So the work can be finished efficiently.The development of computer technology makes it possible to integrate the inner design and field data collection of the Road Survey. The GNSS RTK control terminal with window mobile is portable and low power consumption. And it has the same operating ways as desktop operation system. So GNSS PTK control terminal is the ideal carrier of integrative design.In this paper, starting from the actual situation of road survey design, studying the patterns and process of road survey design, PDA as field mobile terminal operation, aimed at the working characteristics of road inside and outside the industry developed a survey, construction, design as one of the software system Survey works by analysis principle of the differential type of data solver, using serial communication and Bluetooth communication technology to achieve real-time differential analysis of data. The PDA platform as outdoor mobile terminal operation, aimed at the working characteristics of road inside and outside developed a system which constructs survey, construction, design; and the EGM - 2008 elevation model, linear fitting and surface fitting model are loaded into the data acquisition and lofting software, making PDA meet the need of elevation accuracy which is in actual project. Road design function transplanted road design function in the industry to the mobile terminal PDA, to realize the preliminary design of the road flat, vertical and horizontal. In field, graphics can be plotted on a PDA screen in real time, and realize graphic amplification, narrow, translation and other operations. Design and acquisition of data by using PDA terminal mobile database management function to query, modify, add, delete, etc; at the same time the PDA in SQL CE database transfer data back to the computer terminal, computer terminal export data, then use the software to draw in CAD to make it real integration of inside and outside. Construction module uses field data to gather point, then directly to measure, calculate and construction lofting in the field of road line, circular curve and curve.This thesis takes advantage of the function of RTK control terminal.It combines the field collection and inner design of the Road Survey and Design effectively. So the efficiency of can be improved.