Precision measurement and tamping operation method for operating conventional-speed railway without control network

By using the GNSS+ inertial navigation positioning mode combined with temporary reference station and rail detector under the condition of no control network, combined with precision single-point positioning and dynamic post-processing solution, the problem of low positioning accuracy and efficiency in the precision measurement and tamping operation of ordinary speed railway tracks under the condition of no control network is solved, and the precise optimization of track line shape and efficient digitalization of tamping operations are achieved.

WO2025152575A1 Publication Date: 2025-07-24CHINA RAILWAY DESIGN GRP CO LTD
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Patent Information

Application Number
PCT/CN2024/130731
Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Priority Date
2024-01-19
Filing Date
2024-11-08
Publication Date
2025-07-24

AI Technical Summary

Technical Problem

In the precision measurement and pounding operation of ordinary speed railway tracks under the condition of no control network, the positioning accuracy is poor, the efficiency is low, and the digital support is lacking, which affects the quality and efficiency of line maintenance.

Method used

The GNSS+ inertial navigation positioning mode combined with a temporary reference station and a rail detector is adopted. Through precision single point positioning (PPP) and dynamic post-processing solution (PPK), the tamper positioning device is integrated on the tamper truck to achieve real-time centimeter-level mileage positioning and synchronization, and optimize the track line design.

Benefits of technology

The track precision measurement efficiency and positioning accuracy are improved, manual intervention is reduced, and the efficiency and digitalization of tamping operations are improved, so as to achieve accurate optimization and synchronous operations of track lines.

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Abstract

A precision measurement and tamping operation method for an operating conventional-speed railway without a control network. The method comprises the following steps: S100, laying a temporary reference station (1) and performing initial precision track measurement; S200, processing office-processed data; and S300, performing tamping operation and precision measurement. The temporary reference station (1) is laid offline along an operation route by means of precise single-point positioning; when precision track measurement is performed by using a track inspector (2), the temporary reference station (1) may serve as a reference station and cooperate with an onboard moving station (3) to perform dynamic post-processing calculation, such that accurate coordinates of the center line of the route are obtained; and when precision tamping is performed by using a tamping vehicle (4) equipped with a tamping vehicle locator (5), the temporary reference station (1) may serve as a main reference station to provide real-time dynamic positioning for the tamping vehicle (4), thereby realizing centimeter-level mileage positioning accuracy, and realizing autonomous synchronization with field mileage.
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