A high-speed multi-dimensional vibration measurement device and method based on a stripe target

Abstract

A high-speed multi-dimensional vibration measurement apparatus based on a stripe target, comprising a stripe target (9), an imaging module (3), a signal control and processing module and a display module and a high-speed multi-dimensional vibration measurement method based on a stripe target, comprising arranging a stripe target (9) on a vibration structure (8) to be measured; continuously imaging and recording the stripe target (9) using the imaging module (3); the imaging module (3) transmitting an image of the stripe target (9) to a signal control and processing module; the signal control and processing module performing Fourier transformation on stripes at the same position of an identical stripe target in each frame of the image, accurately correcting a peak value frequency using a certain peak value frequency correction method, and then obtaining a time domain curve with structure vibration at the stripe target by means of an imaging mathematical relation and the corrected peak value frequency, that is, obtaining structure vibration signals through reduction; and displaying an image processing result via a display module or performing further data processing by means of the vibration signals. The apparatus and method can achieve vibration measurement for points, lines and surfaces within a certain range, and both the measurement speed and the accuracy are 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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