Deformation abnormity judgment and deformation value estimation method for offshore isolated wind power tower group

Abstract

The invention discloses a deformation abnormity judgment and deformation value estimation method for an offshore isolated wind power tower group, and the method comprises the steps of selecting a wind tower in the wind power tower group to mark an initial reference position, marking the installation positions of corner reflectors of other wind towers, and installing the corner reflectors at the marked positions; performing radiation calibration, focusing, SAR image registration based on isolated points and geocoding according to SAR image data acquired by a satellite aiming at the corner reflectors; according to the SAR image data, calculating the time sequence phase change condition of a single wind tower relative to the wind power tower group through a deformation anomaly sensing algorithm, and determining distribution of wind towers with abnormal deformation; and calculating the phase gradient characteristic of a single wind tower and the phase difference characteristic of the current wind tower relative to the adjacent wind tower and the wind power tower group by using a deformation quantity estimation method, and determining the accumulated deformation quantity of each wind tower with abnormal deformation. Through the technical scheme of the invention, high-frequency and large-range monitoring of the wind power tower group is realized, the accuracy is high, and the equipment layout and maintenance cost is low.

Description

technical field [0001] The invention relates to the technical field of satellite remote sensing, in particular to a deformation anomaly judgment and deformation value estimation method of an isolated offshore wind power tower group. Background technique [0002] Satellite remote sensing has the advantages of wide observation range, strong periodicity, all-day and all-weather, and is not affected by the harsh environment on the ground. At present, remote sensing technology has been used in landslides, mine settlements, important urban building safety monitoring, bridge deformation monitoring and other fields. Successfully applied and it works great. [0003] The corner reflector itself has a relatively stable radar cross-sectional area that can be identified by the target SAR satellite. On the one hand, the corner reflector can be used as a reference point target for radiometric calibration of SAR images, and on the other hand, it can also be placed on the target point for d...

AI Technical Summary

Problems solved by technology

[0005] At present, the common offshore wind tower deformation monitoring technology in the market has the following difficulties: (1) traditional manual surveying and mapping operations are difficult and work efficiency is low; (2) tilt sensors are not accurate enough, and there are large random errors; (3) GPS Expensive to deploy and difficult to maintain

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