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

Abstract

The invention provides a high-speed rail infrastructure deformation monitoring system and method based on a Beidou multi-antenna array. The system comprises a Beidou antenna, a signal amplifier, a feeder line and a Beidou receiver which are connected in sequence. The plurality of Beidou antennas are respectively arranged under a high-speed rail line, on a roadbed and at the fixed end of a bridge; during monitoring, an absolute monitoring method or a relative monitoring method is adopted according to the length of the base line. Base line vectors between the base stations and between the base stations and the monitoring stations are obtained; and carrying out networking adjustment on the baseline vectors between the reference stations and between the reference stations and the monitoring stations, and respectively extracting a coordinate vector of each monitoring station to obtain a final deformation amount.

Description

technical field [0001] The invention relates to the technical field of deformation monitoring of high-speed rail infrastructure, in particular to a method for monitoring deformation of high-speed rail infrastructure based on a Beidou multi-antenna array. Background technique [0002] High-speed railway is the integration of high-tech in the current era, the crystallization of human wisdom and the symbol of railway modernization. By the end of 2020, the operating mileage of China's high-speed rail will reach 35,000 kilometers, accounting for more than 60% of the world's total mileage of high-speed rail. Under the condition of high-speed operation, due to the coupling effect of train impact, fatigue effect, temperature effect, regional geological conditions and other factors, bridges and subgrade foundations will inevitably produce damage accumulation and degradation of bearing capacity. Once the system service state is damaged, it will affect the The safe and stable operatio...

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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