Vibration measurement device and method for tracking rotating blades

Abstract

An embodiment of the invention discloses a vibration measurement device and method for tracking rotary vanes and belongs to the technical field of vibration detection. The vibration measurement devicecomprises a laser source, X-Y guide lenses, a high-speed camera and a controller, wherein the laser source can emit laser, the X-Y guide lenses are arranged outside the laser source and used for guiding laser emitted from the laser source, the high-speed camera catches rotation images of the rotary vanes in real time by a low-resolution mode, and the controller is in communication with the X-Y guide lenses and the high-speed camera, determines vibration test positions of the rotary vanes in real time according to the rotation images, and controls the X-Y guide lenses to guide the laser to track the vibration test positions in real time. According to the technical scheme, the device and method improve accuracy in vibration test.

Description

technical field [0001] The invention relates to the technical field of vibration detection, in particular to a vibration measurement processing technology using a high-speed camera and a laser Doppler vibrometer. Background technique [0002] The vibration information of mechanical equipment is often used to evaluate the operating state of the machinery, diagnose the faults of the mechanical operation, or correct the computer simulation model of the machinery. Therefore, it is particularly important to accurately measure the vibration information of mechanical equipment. Vibration measurement can be divided into contact and non-contact. The contact measurement method needs to attach the vibration sensor to the surface of the object to be measured, but the additional mass often destroys the original vibration state of the object to be measured and affects the measurement accuracy. Therefore, contact measurement methods are not suitable for measuring the vibration of thin-wa...

AI Technical Summary

Problems solved by technology

This tracking measurement method requires the laser source to be placed on the axis of the rotation center. At the same time, because the blade usually swings in the rotation plane, if the swing range is too large, the laser point may even fall outside the blade surface, which will affect the measurement accuracy.

Since fan blades are usually installed at a height of tens of meters or even hundreds of meters, and the laser source is usually placed on the ground, the laser source cannot be on the axis of rotation of the blade, so the vibration of the fan blade under working conditions cannot be measured

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