High-speed rail infrastructure deformation monitoring method based on Beidou multi-antenna array

Abstract

The invention provides a method for monitoring deformation of high-speed rail infrastructure based on a Beidou multi-antenna array. During monitoring, an absolute monitoring or relative monitoring method is adopted according to the length of a baseline. Obtain baseline vectors between reference stations, between reference stations and monitoring stations; perform network adjustment on the baseline vectors between reference stations, between reference stations and monitoring stations, extract the coordinate vectors of each monitoring station respectively, and obtain the final deformation. It can effectively solve the ambiguity re-initialization problem caused by the replacement of the reference satellite of the traditional double-difference model, and improve the reliability of ambiguity resolution.

Description

Technical field [0001] The present invention relates to the field of high-speed rail infrastructure deformation monitoring technology, specifically to a high-speed rail infrastructure deformation monitoring method based on Beidou multi-antenna array. Background [0002] High-speed railway is the integration of high and new technologies in the current era, the crystallization of human wisdom and the symbol of railway modernization. By the end of 2020, China's high-speed rail operating mileage will reach 35,000 kilometers, accounting for more than 60% of the world's total high-speed rail mileage, China's high-speed rail eight vertical and eight horizontal basically completed, China successfully built and operated the world's most developed high-speed railway network. Under the condition of high-speed operation, due to the coupling effect of factors such as train impact, fatigue effect, temperature effect, regional geological conditions, etc., bridges and subgrade foundations inevit...

AI Technical Summary

Problems solved by technology

For Beidou high-precision positioning, the short-baseline relative positioning method is mainly used, which can well eliminate or weaken the influence of atmospheric and other correlation errors. However, due to the complex observation environment of high-speed rail, the signal is easily affected by train shielding vibration and high-voltage electromagnetic. The relative positioning method cannot meet the monitoring accuracy requirements of high-speed rail infrastructure. At the same time, the high cost of Beidou receivers also severely limits the large-scale application of Beidou in the deformation monitoring of high-speed rail infrastructure.

In summary, the current Beidou monitoring technology is limited by the cost and high-speed rail environment, which makes the application scale of Beidou in the deformation monitoring of high-speed rail infrastructure relatively low.

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