GNSS/SINS combined navigation precise speed measurement and positioning method and system

A technology of combined navigation and positioning method, which is applied in the application field of inertial technology, can solve the problems such as the inability to accurately measure the speed of the train, and achieve the effect of overcoming GNSS's susceptibility to interference, high long-term accuracy, and improved accuracy
CN107894232AInactive Publication Date: 2018-04-10HUNAN AEROSPACE ELECTROMECHANICAL EQUIP & SPECIAL MATERIAL INST
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HUNAN AEROSPACE ELECTROMECHANICAL EQUIP & SPECIAL MATERIAL INST
Publication Date
2018-04-10
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a GNSS / SINS combined navigation precise speed measurement and positioning method and system. Navigation data output by SINS and GNSS is fused, the signal tacking process and data fusion are real-time synchronous, the obtained data is the most accurate at any time, and by fully utilizing the advantages that the SINS is high in short-term precision, outside interference doesnot exist, and the GNSS is high in long-term precision, the defects that the SINS is low in long-term precision, and the GNSS is likely to be interfered are overcome; the precision of speed measurement and positioning is improved, and the problem that a solid wheel rail free traditional train adopts a traditional speed measurement method, and then the train speed cannot be measured precisely is solved; strong support is formed for rapid development of the maglev train industry, and meanwhile development of the Beidou satellite application industry is driven, and the method and system can be promoted in rail transportation such as automatic driving or self-driving.
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Description

technical field

[0001] The invention belongs to the field of inertia technology application. In particular, it relates to an inertial integrated navigation technology that can be used in urban rail transit and automatic driving. Background technique

[0002] After the opening of Changsha Maglev Project, the first maglev line with independent property rights in China, problems of inaccurate low-speed speed measurement and inaccurate parking positioning were found during operation. When the maglev train is running, the body is suspended on the track, and there is no mechanical contact between the train and the track except for the power supply rail. Therefore, the speed measurement technology of "axle pulse sensor", "axle counting" and "beacon" based on mechanical contact on the traditional train is used in the maglev train. In the environment where the train has no physical wheels and rails, the speed of the maglev train cannot be accurately measured, which affects the accur...

Claims

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