2results about How to "Avoid retesting" patented technology

This invention discloses a method for judging and correcting the flattening phenomenon of wind turbine blade root load, comprising the following steps: acquiring real-time blade load data under grid-connected operation of the wind turbine; judging whether the blade root oscillation load data in the real-time blade load data has a flattening phenomenon; judging whether it needs to be merged into a single flattening segment based on the interval between each flattening segment, and calculating the cumulative duration of the flattening segment; judging whether the cumulative duration is not greater than a preset cumulative duration threshold; extracting features of the normal segment located in the previous cycle of each flattening segment from the blade root oscillation load data; generating replacement loads for the flattening segment based on the features and performing segment-by-sine replacement on each flattening segment, while smoothly connecting the start and end points of the flattening segment to complete the correction of the flattening phenomenon of wind turbine blade root load. This invention corrects flattening through feature extraction and sinusoidal load generation, meeting the load testing accuracy requirements, avoiding long-term wind turbine shutdowns, and reducing power generation losses.

The utility model discloses a bridge water seepage detection device for municipal bridge engineering, and relates to the technical field of bridge water seepage detection, the bridge water seepage detection device comprises a clamping plate assembly, an adjusting mechanism and a fixing mechanism, the fixing mechanism comprises a sliding plate, a detection box, a fixing sleeve, a spring, a sliding rod, an arc-shaped fixing plate, a connecting rod and a drawing handle. By arranging the fixing mechanism, the detection box can be pushed to a detection position by pulling the connecting rod during use, an operator does not need to manually push the detection box at the bottom of a bridge, the detection efficiency is reduced, the operation is simpler and more convenient, potential safety hazards caused by operation at the bottom of the bridge are avoided, and the detection efficiency is improved. And the measuring cylinders with different sizes and sizes can be fixed according to actual use scenes, so that the device is more practical, and meanwhile, the accuracy of detection data is improved.