Research On River Survey Data Acquisition And Processing Tenology And Application

In the field of water conservancy projects,the river dredging projects,which are often time-critical and have heavy tasks,are particularly urgent in the preliminary survey of water conservancy projects.Therefore,to complete the measurement work within the specified time limit,it is necessary to improve the measurement work efficiency and maintain a certain degree of accuracy.The layout of river control networks,measurement of broken parts,measurement of underwater terrain,measurement of river sections,and post-processing of survey data are all very time-consuming operations.In response to the above problems,the research work carried out in the paper includes:(1)Based on the analysis of conventional river control measurement technology,the integrated data acquisition method of river map root control and fragment measurement was systematically discussed.The integrated data acquisition technology experiment was designed in detail,and the complex environment was blocked by trees and blocked by buildings.The effect of factors on the network RTK measurement was analyzed,and its internal and external accuracy levels were analyzed.At the same time,the MATLAB programming was used to simulate the planar and elevation accuracy of the total station to verify the reliability of the integrated data acquisition technology in river measurement applications.(2)The design and selection principles of river sections and the cross-section measurement methods are introduced.The horizontal and elevation errors of the river section measurements are analyzed.The system architecture and operation flow of the unmanned sounding boat are introduced.The time delay of the unmanned depth sounding boat is mainly discussed.For the impact on the river channel section,two methods of time delay detection are used,Sectional overall translation method and the characteristic point matching method.The problem section is model-corrected and the reliability of the two methods is analyzed.(3)For the inefficiency of river measurement data processing,the tool data processing toolbox for river engineering was written in AutoLisp language.In the form of AutoCAD pull-down menus,the data processing functions such as loading and correction of image data,extraction of a single river channel,automatic extraction of river lines,and layout design of cross-section lines are implemented to improve work efficiency and application results are good.Taking the measurement of the water project of the Tuohe River in Jinan City as an example,the integrated data collection method of the Tugen control and fragment measurement,the unmanned survey ship positioning and the sounding technology are applied to the river survey,and the field data collection period is 40 times longer than originally planned.The days were shortened to 23 days.The results of surveying and mapping can meet the requirements of water conservancy engineering design.The river survey toolbox developed based on AutoLisp was applied to the engineering practice,which greatly improved the efficiency of internal data processing.