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Method and system for monitoring local integrity of train satellite positioning

A technology of integrity monitoring and satellite positioning, applied in satellite radio beacon positioning systems, radio wave measurement systems, measurement devices, etc., can solve problems such as inability to respond to local satellite observation environment and characteristics, difficult detection and elimination of satellite observation faults, etc.

Active Publication Date: 2019-12-06
BEIJING JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it is very difficult to uniformly model and describe the quality of satellite positioning observations at each moment in a huge railway network space, which makes the conventional Receiver Autonomous Integrity Monitoring (RAIM) technology unable to respond to time-varying The environment and characteristics of local satellite observations make it difficult to completely detect and eliminate faults in satellite observations

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  • Method and system for monitoring local integrity of train satellite positioning
  • Method and system for monitoring local integrity of train satellite positioning
  • Method and system for monitoring local integrity of train satellite positioning

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Embodiment Construction

[0111] 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.

[0112] The application scenario of the train satellite positioning local integrity monitoring method provided in this example is: the operation plan of a specific train is known, and the train starts from time T according to the plan. plan,A to T plan,B When the train departs from station A and arrives at station B, the geospatial information of the track line between station A and station B is known, and the trackside data processing center receives the observation data sent by all trains in transit in real time, accordin...

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Abstract

The invention discloses a method and system for monitoring the local integrity of train satellite positioning. The method comprises the steps of collecting track line geospatial information and trainrunning plan information of a target train; dividing the running process of the target train to obtain spatial-temporal local area grids; collecting satellite positioning observation performance information in real time in the running process of the target train, and calculating a satellite positioning local area observation model of each spatial-temporal local area grid; integrating parameters ofthe models to construct a satellite positioning observation model parameter set; extracting model parameters of the located spatial-temporal local area grid by using the satellite positioning observation data received by the train in the running process, and calculating on-line and off-line positioning error level protection grades; judging the availability state of integrity monitoring, carryingout fault detection and identification on the satellite positioning observation set under an available condition, performing reconstruction on the train satellite positioning observation set in realtime, and implementing positioning calculation. The method can realize effective adaptation to the uncertainty of satellite signal observation conditions in the actual running of the train.

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 method and system for monitoring the local integrity of train satellite positioning. Background technique [0002] In the rail transit system, real-time and accurate train running status information (such as position, speed, direction, etc.) is the key basis for monitoring and controlling the train running process. The conventional train control system uses the train wheel axle speed sensor to calculate the train mileage and speed in real time, and uses the transponder laid on the track to correct the accumulated error in the positioning solution of the wheel axle speed sensor. In recent years, based on the intelligent and efficient development needs of rail transit systems, how to make train speed measurement and positioning get rid of the dependence on trackside equipment such as transponders and track circuits...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S19/20
CPCG01S19/20
Inventor 刘江蔡伯根王剑陆德彪上官伟姜维王明旭
Owner BEIJING JIAOTONG UNIV
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