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A satellite positioning method and system for trains based on collaborative integrity monitoring

A technology of integrity monitoring and satellite positioning, applied in satellite radio beacon positioning system, radio wave measurement system, measuring device, etc., can solve the problems of integrity monitoring misjudgment and missed detection, usability and train travel coverage, etc.

Inactive Publication Date: 2017-03-29
BEIJING JIAOTONG UNIV
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Problems solved by technology

However, the availability of RAIM may not be able to completely cover the planned train itinerary due to factors such as insufficient number of satellites received, and the real-time integrity monitoring during the dynamic operation of the train may have a certain risk of misjudgment and missed detection, thereby affecting It can accurately and timely play the role of positioning decision support and assist the effective implementation of functions such as train control, tracking and approaching warning

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  • A satellite positioning method and system for trains based on collaborative integrity monitoring
  • A satellite positioning method and system for trains based on collaborative integrity monitoring
  • A satellite positioning method and system for trains based on collaborative integrity monitoring

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Embodiment Construction

[0067] In order to illustrate the present invention more clearly, the present invention will be further described below in conjunction with preferred embodiments and accompanying drawings. Similar parts in the figures are denoted by the same reference numerals. Those skilled in the art should understand that the content specifically described below is illustrative rather than restrictive, and should not limit the protection scope of the present invention.

[0068] The application scenario of the train satellite positioning method based on cooperative integrity monitoring provided in this embodiment is: the target train is known from time T A to T B And the operation plan that operates within the space-time range to be positioned in the section between stations A and B, correspondingly, the off-line data of the dedicated orbit map database and satellite ephemeris data sources are used as initial conditions, and the receiver in the position decision-making unit adopts The trai...

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Abstract

The invention discloses a train satellite positioning method and a train satellite positioning system based on collaborative integrity monitoring. The method comprises the steps of acquiring offline basic data, predicting feature point positioning error offline protection limits distributed in a time-space range to be positioned to form a time-space distribution feature library, extracting observation information of a navigation satellite to a target train in real time and calculating the target train positioning error online protection limit in real time according to the observation information, calculating the feature point positioning error offline protection limit corresponding to the running time and mileage value of the target train positioning error online protection limit in the time-space distribution feature library, respectively comparing the target train positioning error online protection limit and the feature point positioning error offline protection limit corresponding to the running time and mileage value of the target train positioning error online protection limit with an alarm threshold, and adjusting the target train positioning decision scheme in real time according to the result of comparison. By adopting the technical scheme of the invention, the function of train positioning integrity monitoring can be improved effectively.

Description

technical field [0001] The invention relates to the technical field of train positioning based on a satellite navigation system. More specifically, it relates to a train satellite positioning method and system based on collaborative integrity monitoring. Background technique [0002] As the main carrier of the railway transportation system, the train operation control system (referred to as the train control system) and the train tracking and early warning system (referred to as the early warning system) play a vital role in the safety of its in-transit operation. In order to achieve effective train control and implement effective protection in the presence of safety risks such as train rear-end collisions, accurate and reliable train operation status information, especially the position, speed, and direction of the train on the track, is the key to determine the corresponding safety guarantees. Key conditions for measures to be effective. Conventional technical means, suc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S19/50
CPCG01S19/50
Inventor 刘江蔡伯根王剑上官伟
Owner BEIJING JIAOTONG UNIV
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