Displacement testing system and displacement testing method

Abstract

The invention discloses a displacement testing system which comprises a centrifugal machine, a micro optical fiber probe, a feature point calibration label, a micro optical fiber insertion part, a development and image acquisition device, a cold light source, an optical fiber image transmission bundle, an objective lens, an ocular lens, a network cable and an industrial personal computer. In addition, a displacement testing method comprises the steps of calibration label image acquisition, calibration image processing, displacement / pixel parameter calculation, radial / circumferential displacement image acquisition, detection parameter setting, measurement image processing and displacement display storage. According to the invention, the optical fiber endoscope is applied to a centrifugal dynamic test task and advantages of the optical fiber endoscope are brought into full play. Compared with the traditional displacement measurement mode, the disclosed displacement testing system and displacement testing method have the following advantages: the product destructiveness is low; in-situ test is basically realized; the operation is easy and feasible; the displacement is measured by utilizing an optical imaging technology; and the precision and accuracy of displacement measurement can be improved by further mining and developing the image processing algorithm and technology and the precision can reach a plurality of micro levels at most.

Description

technical field [0001] The invention belongs to the technical field of testing, and in particular relates to a displacement testing system and a displacement testing method. Background technique [0002] In the environmental adaptability test of complex structure products, it is often necessary to detect the radial and circumferential displacement of the structure, and understand the dynamic response law of the corresponding displacement, so as to improve the scientific evaluation and prediction ability of the equipment performance change, and at the same time, it is required to reduce the impact of the detection device on the product. detection damage. Therefore, there is an increasingly strong need to develop a long-distance, low-damage, high-precision displacement testing system and to carry out related testing technology research. [0003] Traditional displacement measurement uses differential displacement sensors, eddy current sensors, laser displacement meters, etc. T...

AI Technical Summary

Problems solved by technology

[0003] Traditional displacement measurement uses differential displacement sensors, eddy current sensors, laser displacement meters, etc. These devices can only measure displacement changes in one direction, and the volume is relatively large. In actual testing, there is a lot of product reprocessing, which is relatively destructive to the product. Satisfy the radial displacement measurement of the structure, but the measurement of the circumferential displacement is basically invalid

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