Xinjiang Goldwind Science & Technology has filed a patent for a clearance monitoring system for wind turbines. The system includes a millimeter wave radar installed on the left side of the nacelle, which monitors the movement data of each blade in the impeller’s motion area. A processor receives the data and determines the blade clearance between each blade and the wind turbine tower. GlobalData’s report on Xinjiang Goldwind Science & Technology gives a 360-degree view of the company including its patenting strategy. Buy the report here.

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According to GlobalData s company profile on Xinjiang Goldwind Science & Technology, ram air turbine was a key innovation area identified from patents. Xinjiang Goldwind Science & Technology's grant share as of June 2023 was 1%. Grant share is based on the ratio of number of grants to total number of patents.

Clearance monitoring system for wind turbine blades

Source: United States Patent and Trademark Office (USPTO). Credit: Xinjiang Goldwind Science & Technology Co Ltd

A recently filed patent (Publication Number: US20230204014A1) describes a clearance monitoring system for wind turbines. The system includes a processor and a millimeter-wave radar that is mounted on the left side of the wind turbine's nacelle. The radar is directed towards the lower left of the area where the turbine's blades rotate and monitors the motion data of each blade. The processor uses this data to determine the clearance between each blade and the tower of the wind turbine.

The patent also mentions that the millimeter-wave radar is mounted on the nacelle side wall close to the top wall. The detection range of the radar allows for a distance between the radar probe and the blade tip ranging from 60 meters to 110 meters. During the rotation of the turbine's blades, the processor determines the trail information of the blade tip moving towards the tower based on the motion data.

The angles between the detection centerline of the millimeter-wave radar and three reference planes are also specified in the patent. The first reference plane is parallel to the central axis of the impeller and the tower's axis, the second reference plane is perpendicular to the central axis of the impeller and parallel to the tower's axis, and the third reference plane is perpendicular to the first and second reference planes.

The patent also describes a clearance monitoring method for wind turbines using the millimeter-wave radar. The method involves acquiring motion data of each blade in the motion area, determining the trail information of the blade tip moving towards the tower based on the motion data, and then determining the blade clearance based on the trail information.

The patent further includes a clearance monitoring apparatus for wind turbines, which includes an acquiring module for motion data and a distance measuring module for determining the blade clearance.

Overall, this patent describes a clearance monitoring system and method for wind turbines using a millimeter-wave radar. The system allows for accurate monitoring of blade clearance and can help prevent collisions between the blades and the tower.

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GlobalData, the leading provider of industry intelligence, provided the underlying data, research, and analysis used to produce this article.

GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies