A Vibration Monitoring Method of Fan Tower Foundation Ring Based on Calibration Plate Pose Calculation

Abstract

The invention belongs to the monitoring field of wind power generators, and in particular relates to a method for monitoring the vibration of the fan tower base ring based on the calculation of the calibration plate pose. The calibration plate used for computer vision is fixed on the inner wall of the fan tower base ring, so that the The calibration plate becomes a visual monitoring mark for the posture change of the fan tower foundation ring; the vibration monitoring of the wind tower foundation ring is realized by calculating the pose of the calibration board in real time. Specifically, one or more monocular cameras are used to perform real-time imaging and identification of the same number of corresponding calibration plates fixed on the inner wall of the foundation ring of the wind turbine tower, and calculate the "calibration plate displacement" of the foundation ring of the wind turbine tower in the camera coordinate system, The three monitoring indicators of "tower tilt angle" and "tower tilt azimuth", and check whether these indicators are abnormal according to the preset indicator threshold. The equipment used in the present invention has low manufacturing and assembly costs, convenient installation and deployment, and high monitoring accuracy, and can continuously monitor the vibration of the tower foundation ring for 24 hours.

Description

technical field [0001] The invention belongs to the monitoring field of wind power generators, and in particular relates to a method for monitoring vibration of a wind turbine tower base ring based on calibration board pose calculation. Background technique [0002] At present, the inclination detection of the foundation ring of the wind turbine tower requires construction personnel to carry professional optical levels, tripods, tower rulers and other tools and equipment, and perform 8-16 optical point measurements at the bottom of the tower. During this process, one person needs to move the tower ruler At a specific position, another person reads the scale of the tower ruler through the scope and records it. This measurement method cannot be completed by a single person. The environment at the bottom of the tower is complicated, and iron support frames and cables can be seen everywhere, so it is not convenient to complete the calculation work on the measurement site. After...

AI Technical Summary

Problems solved by technology

At present, the tower inclination sensor equipment is usually used in the industry. This equipment has high cost and complicated installation, and has not been widely promoted in the wind power industry.

In addition, the existing method of using a panoramic camera to capture marking points and using visual measurement to achieve monitoring has been proposed, but the measurement accuracy is still not comparable to the method using an angle sensor, and the assembly and installation process is also relatively complicated.

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