Rotation shaft three-dimensional vibration simultaneous measurement apparatus and method

Abstract

The present invention relates to a rotation shaft three-dimensional vibration simultaneous measurement apparatus and method. The apparatus comprises a fringe sensor, an image acquisition module, image processing software and a computer. The method comprises the following steps that: the fringe sensor is mounted on a rotation shaft to be measured; the image acquisition module is installed just before the rotation shaft, the imaging optical axis of the image acquisition module is perpendicular to the rotation shaft and is located in the same plane with the rotation shaft, and the imaging lens of the image acquisition module is adjusted so that the fringe sensor can be clearly imaged at the middle of the imaging sensor of the image acquisition module; when the rotation shaft rotates, the image acquisition module performs real-time imaging on the fringe sensor and transmits images to the computer for processing the images; and the image processing software processes acquired fringe images to obtain the three-dimensional vibration information of the rotation shaft.

Description

technical field [0001] The invention relates to the technical field of vibration measurement by machine vision, in particular to a device and method for non-contact synchronous measurement of three-dimensional vibration of a rotating shaft. Background technique [0002] The axial vibration and radial vibration signals of the rotating shaft are very important for the condition monitoring and defect detection of the rotating shaft, because these vibration signals are closely related to the dynamic characteristics of the rotating machinery. For example, shaft misalignment is a common failure of rotating machinery shafts, and the main factors causing shaft misalignment are assembly errors, thermal deformation, or unbalanced loads. Excessive misalignment of the shaft may cause strong vibration of the shaft, which may cause damage and harm to the rotating machinery. Therefore, real-time monitoring of the vibration signal of the rotating shaft is of great significance for the heal...

AI Technical Summary

Problems solved by technology

Now the more popular non-contact shaft vibration measurement method mainly uses eddy current sensor, but the eddy current sensor has requirements on the material of the shaft, which may not be suitable for some non-metallic shafts

Another non-contact measurement method is the laser Doppler measuring instrument, but this equipment is generally expensive and not economical

Moreover, for eddy current sensors and laser Doppler measuring instruments, vibration in one direction requires a sensor or probe, and it is not possible to measure multi-dimensional vibration with a sensor or probe

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