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Train combined positioning method under condition of limited satellite signal

A satellite signal and combined positioning technology, applied in satellite radio beacon positioning systems, measuring devices, instruments, etc., can solve problems such as in-depth research on combined positioning methods

Active Publication Date: 2018-06-22
BEIJING JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, in the prior art, there is no in-depth research on the combined positioning method of the train autonomously switching the positioning mode under the restricted conditions.

Method used

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  • Train combined positioning method under condition of limited satellite signal
  • Train combined positioning method under condition of limited satellite signal
  • Train combined positioning method under condition of limited satellite signal

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Embodiment Construction

[0059] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0060] Those skilled in the art will understand that unless otherwise stated, the singular forms "a", "an", "said" and "the" used herein may also include plural forms. It should be further understood that the word "comprising" used in the description of the present invention refers to the presence of said features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, Integers, steps, operations, elements, components, and / or groups thereof. It will be understoo...

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Abstract

The invention provides a train combined positioning method under a condition of a limited satellite signal. The method can revise bias of an inertial navigation system by using position information provided by a satellite navigation system under the condition of effective satellite positioning, combines train gesture information with output parameter of a wheel sensor, calculates to obtain three-dimensional speed under a navigation coordinate system and reserves information of satellite unlocking. Under the condition of satellite positioning failure, a wheel sensor / inertial navigation systemis applied to combine and position; a wheel sensor is applied to revise the bias of the inertial navigation system, thus the train combination navigation system can provide positioning information with a certain precision. A high-precision digital track map is used for revising the bias of the train on the track vertical direction, thus the positioning precision of the train is guaranteed. The method can solve the positioning problem of the failure zone of the satellite signal, and carry out system independent switching under different satellite positioning conditions, thus the continuous, exact and reliable train position information can be acquired.

Description

technical field [0001] The invention relates to the technical field of railway train positioning, in particular to a combined train positioning method under restricted conditions. Background technique [0002] As the main artery of my country's national economy, important national infrastructure, and popular means of transportation, railway has many advantages such as large transport capacity, high efficiency, long transport distance, and low energy consumption. It is very suitable for the basic national conditions of my country's large population and vast territory. important role in economic and social development. As the "nerve center" of railway transportation, the train operation control system is the core to ensure the safety of railway traffic and improve transportation efficiency. It needs to grasp the speed, position and other information of the train in real time and accurately. Improving the safety level of train operation, reducing operation and maintenance costs...

Claims

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Application Information

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IPC IPC(8): G01S19/49G01S19/50G01C21/16
CPCG01C21/165G01S19/49G01S19/50
Inventor 姜维蔡伯根陈思睿王剑上官伟陆德彪刘江
Owner BEIJING JIAOTONG UNIV
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