Existing railway line mileage lofting method based on aerial survey technique

Abstract

The invention discloses an existing railway line mileage lofting method based on an aerial survey technique. The method comprises the following steps of extracting of discrete point coordinates, forward projecting of the coordinates, complete railway mid-line generating, line mileage valuating, backward projecting of the coordinates and mileage lofting. According to the existing railway line mileage lofting method, accumulation of manual measurement errors and occurrence of gross errors are weakened, labor input is reduced, the working efficiency is improved, and train operation accidents caused when railway signals are disturbed by a steel rule are avoided; traditional existing line on-line operation can be replaced, the error tolerance requirement of railway mileage measurement can be met, and the mileage lofting precision can meet the standard requirement of 1/2,000.

Description

technical field [0001] The invention belongs to the technical field of plane surveying and mapping of existing railway lines, and in particular relates to a method for setting out mileage of existing railway lines based on aerial survey technology. Background technique [0002] According to the medium and long-term planning of my country's railways, my country's railway operation mileage will reach 120,000 km in 2020, and the double-track rate and electrification rate will both reach over 50%. Among them, the mileage of ballast railways will exceed 100,000 km. Every year, the railway department conducts re-measurement, electrification transformation and expansion of the second line on some common-speed railways. These projects all require plane surveying and mapping of existing lines, of which mileage measurement is the basis and an important part of plane surveying and mapping. [0003] The traditional method of measuring the mileage of existing lines is to use a steel rule...

AI Technical Summary

Problems solved by technology

The steel ruler measurement method requires 6 people to work together. The efficiency of joint work on the railway line is low. When the time is short, the work cannot be completed according to the normal construction period.

At the same time, the conductivity of the steel ruler has potential safety hazards that interfere with railway signals, which may affect the safe running of trains

In addition, when using a steel ruler to measure, the measurement accuracy of the steel ruler will be affected by temperature and personnel tension, which is prone to cumulative errors and affects the accuracy of mileage measurement.

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