High speed multi-dimensional vibration measuring device and method based on stripe target

Abstract

The invention relates to a high speed multi-dimensional vibration measuring device and method based on a stripe target. The device comprises a stripe target, an imaging module, a signal control and processing module and a display module. The method includes the following steps: arranging the stripe target on a vibration structure to be measured; adopting an image module to conduct continuous imaging and recording on the stripe target; utilizing the imaging module to transmit the image of the stripe target to the signal control and processing module; utilizing the signal control and processing module to conduct Fourier transform on the stripes at the same position of the same stripe target in each frame of the image, adopting a certain peak value frequency correction method to accurate correct the peak value frequency, and then utilizing the imaging mathematical relation and the corrected peak value frequency to obtain a time domain curve with stripe target structure vibration, namely acquiring structure vibration signals through reduction; displaying an image processing result through a display module or conducting further data processing through vibration signals. By means of the device and method, vibration measurement of points, lines and faces in certain range is achieved, the measurement speed is high, and the accuracy is high.

Description

technical field [0001] The invention relates to a high-speed multi-dimensional vibration measurement device and method based on a stripe target, in particular to a device and method for high-speed measurement of micron-level and millimeter-level vibrations using a non-contact method, which belongs to the technical field of optical measurement vibration . Background technique [0002] Vibration is a basic form of motion in which objects exist, and it exists widely in nature and people's life and production fields, such as earthquakes, loudspeaker vibrations, engine running vibrations of various machines, and forced vibrations of large infrastructures such as railways and bridges Wait. As an effective means to solve engineering vibration problems, vibration measurement technology has made great progress in vibration theory, vibration measurement technology and application after years of exploration by people from all walks of life. Combining advanced electronic technology an...

AI Technical Summary

Problems solved by technology

For example, the eddy current sensor is used for the measurement of vibration, its measurement is nonlinear and can only be used for non-contact measurement of metal objects; some other optical non-contact measurement methods are basically based on optical interference technology for detection, detection The accuracy can reach a relatively high level, but such non-contact methods such as laser or white light interferometry methods need to ensure that the reference light and the detection light can always be in conditions that can produce interference, and often the interference signal is often affected by the surface of the detection object The influence of roughness or spatial position; most of these detection methods can only measure one point or a few points at the same time, and additional hardware investment is required for multi-point and large-scale measurement

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