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Method for evaluating track smoothness by using Beidou positioning equipment and inertial navigation system

A Beidou positioning and inertial navigation system technology, which is used in tracks, track maintenance, railway auxiliary equipment, etc., and can solve the problems of low coordinate accuracy and low efficiency.

Pending Publication Date: 2021-11-23
CHINA RAILWAY ERYUAN ENG GRP CO LTD
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Problems solved by technology

[0006] The object of the present invention is to: when adopting prior art to measure the line coordinates of the track point of ballasted railway track, the method of using inertial navigation trolley combined with total station to set up station measurement is inefficient, and the coordinate accuracy measured by Beidou positioning equipment is low problem, provide a method for evaluating track smoothness using Beidou positioning equipment and inertial navigation system

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  • Method for evaluating track smoothness by using Beidou positioning equipment and inertial navigation system
  • Method for evaluating track smoothness by using Beidou positioning equipment and inertial navigation system
  • Method for evaluating track smoothness by using Beidou positioning equipment and inertial navigation system

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Embodiment 1

[0036] A method for evaluating track smoothness using Beidou positioning equipment and inertial navigation system, which is used to evaluate the smoothness of ballasted tracks (ballasted tracks with train speeds less than 160Km / h) that do not require high precision. Beidou positioning equipment for measuring coordinates, a method for setting a base station and a rover station to obtain coordinates of the rover station in the RTK (Real Time Kinematic, real-time dynamic positioning technology) measurement method, and a method for obtaining coordinates of the rover station and inertial navigation system, wherein The inertial navigation system includes an inertial navigation track geometric state dynamic detector (hereinafter referred to as the inertial navigation car) provided in the prior art (such as Chinese Patent Publication No. CN209553210U), an odometer installed on the inertial navigation car, and an inertial navigation equipment. The inertial navigation system can measure...

Embodiment 2

[0049] This embodiment obtains the measurement coordinates and line coordinates at various positions on the railway track. The coordinates are done differently. Specifically, the method for evaluating track comfort using Beidou positioning data in this embodiment includes:

[0050] S1: Before the inertial navigation system works, it needs to be initialized first. The so-called initialization refers to aligning the inertial navigation system so that the inertial navigation system can start working; the time required for initialization is about 10 minutes.

[0051] During the initialization process of the inertial navigation system, the accuracy evaluation of the measurement coordinates received by the Beidou positioning equipment can be carried out. Receive the measurement coordinates of the railway track at this position once), and calculate the medium error of the multiple received measurement coordinates. If the medium error is not greater than 5mm, the measurement coordina...

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Abstract

The invention relates to the technical field of tracks, in particular to a method for evaluating track smoothness by using Beidou positioning equipment and an inertial navigation system. The inertial navigation system and the moving station are used for measuring the measurement coordinates on the railway track, the Beidou positioning equipment is used for receiving the measurement coordinates on the railway track, the measurement coordinates obtained in the two modes are converted into line coordinates and then fused, and the line coordinates with higher precision are obtained. The smoothness evaluation of the railway track is carried out by using the line coordinate with higher precision. According to the method provided by the invention, a total station does not need to be used for station setting measurement, so that the measurement time is saved, the measurement efficiency is improved, and the precision of a measurement result can also be ensured.

Description

technical field [0001] The invention relates to a method for evaluating track smoothness, in particular to a method for evaluating track smoothness by using a Beidou positioning device and an inertial navigation system. Background technique [0002] After the railway track has been used for a period of time, it is necessary to measure the position of multiple points on the railway track, as well as the mileage, heading angle and pitch angle at the position, to judge whether the smoothness of the railway track still meets the use requirements. [0003] At present, the inertial navigation track geometric state dynamic detector (hereinafter referred to as the inertial navigation trolley) provided in the prior art (such as Chinese Patent Publication No. CN209553210U) is used more. The inertial navigation equipment and the odometer are installed on the inertial navigation trolley, which can Record the mileage of each track point when the inertial navigation car walks along the ra...

Claims

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Application Information

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IPC IPC(8): G01B21/30E01B35/00B61K9/08
CPCG01B21/30E01B35/00B61K9/08Y02T90/00
Inventor 王国祥郑子天刘志鹏梅熙赖鸿斌陈海军刘畅赵龙杨锋刘竹均曹体涛王一川周震刘志赵有兵
Owner CHINA RAILWAY ERYUAN ENG GRP CO LTD
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