A system and method for measuring radial circular runout of high-temperature shafts based on digital speckle

Abstract

The invention discloses a high-temperature shaft radial circle run-out measuring system and method based on digital speckles. A position sensor in the system is used for measuring whether a to-be-measured high-temperature shaft reaches a paint spraying area or not; the speckle paint spraying device is used for spraying high-temperature paint to the to-be-measured high-temperature shaft to form a to-be-measured high-temperature speckle shaft; the lighting device is used for irradiating the to-be-measured high-temperature speckle shaft; the color of high-temperature paint in the speckle paint spraying device is the same as that of illuminating light emitted by the illuminating device; the image acquisition system is used for shooting the irradiated to-be-measured high-temperature speckle shaft to obtain a shaft speckle image; and the industrial personal computer is used for controlling the speckle paint spraying device, the lighting device and the image acquisition system to work after the to-be-measured high-temperature shaft reaches the paint spraying area, and calculating the radial circular run-out error of the to-be-measured high-temperature shaft based on a projection method according to the speckle image of the shaft. According to the invention, non-contact measurement of the radial circular run-out of the high-temperature shaft piece in a high-temperature state is realized.

Description

technical field [0001] The invention relates to the technical field of high-temperature non-contact measurement, in particular to a system and method for measuring radial circular runout of a high-temperature shaft based on digital speckle. Background technique [0002] At present, from the perspective of domestic and foreign research methods in the field of pyrometry, they can be roughly divided into two categories: laser method and visual method. These two methods have wide applicability and can adapt to most current production requirements, so they are widely used. However, with the rapid development of industrialization, the laser scanning method obviously cannot keep up with the rhythm of industrialization, and compared with the visual method, laser equipment is more expensive, and most of them still rely on imports. Visible light vision still has certain limitations due to the saturation distortion of high-temperature imaging, which needs to be improved and developed i...

AI Technical Summary

Problems solved by technology

[0004] Based on this, it is necessary to provide a high-temperature shaft radial runout measurement system and method based on digital speckle to solve the problem of image saturation distortion at high temperature, and to realize the radial runout measurement at high temperature according to the randomness of speckle distribution. Non-contact measurement of runout

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