High-speed rotating blade deformation measurement method, system, equipment and medium

By using phase locking devices and digital image-related methods in high-speed rotating blade measurement systems, the rigid displacement of the blade is eliminated, the measurement error caused by inter-frame rotation angle and synchronization control signal delay is solved, and the accuracy of blade deformation measurement is improved.

CN115979155BActive Publication Date: 2025-08-08CHINA ACAD OF AEROSPACE AERODYNAMICS
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Patent Information

Application Number
CN202211690161.9
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2022-12-27
Publication Date
2025-08-08
Estimated Expiration
2042-12-27

AI Technical Summary

Technical Problem

In the prior art, when measuring deformation of high-speed rotating blades, the inter-frame rotation angle causes speckle image decorrelation and delay of synchronization control signal, resulting in an increase in measurement error, affecting measurement accuracy.

Method used

The phase locking device is adopted, including an infrared photoelectric trigger switch and a camera set, and the camera is synchronously controlled to capture images by infrared beams. Combined with digital image correlation methods and three-dimensional point cloud registration, the rigid displacement of the paddle is eliminated and the measurement accuracy is improved.

Benefits of technology

Phase locking of high-speed rotating blades is achieved, eliminating the blade rigid body displacement and improving the accuracy and accuracy of deformation measurement.

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Abstract

The embodiments of this specification provide a method, system, equipment and medium for measuring the deformation of a high-speed rotating blade, wherein the system includes a blade, a phase locking device and a computer; the blade is arranged on a hub, and the hub is controlled by a computer to drive the blade to rotate; the phase locking device includes an infrared photoelectric trigger switch and a camera group connected to a synchronous controller, and before the experiment, the synchronous controller controls each camera of the camera group to synchronously shoot the blade to generate image group one, and sends it to the computer; during the experiment, the blade rotates, and the computer controls the infrared photoelectric trigger switch to send an infrared beam to the blade, and after receiving the reflected beam, sends a high-level pulse signal to the synchronous controller, and the synchronous controller controls each camera of the camera group to synchronously shoot the blade to generate image group two and send it to the computer; the blade displacement is obtained by calculation by the computer.
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