Measurement method of axial size of abrupt-change cross section of revolving body
A technology of axial dimension and rotary body, applied in the field of rapid measurement of axial dimension, to achieve the effect of easy data processing, simple measurement procedure and convenient implementation
Inactive Publication Date: 2011-05-04
BEIJING INSTITUTE OF TECHNOLOGYGY
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[0006] The purpose of the present invention is to propose a general method for measuring the axial dimension of the sudden change section of the rotary body, which uses a non-contact sensor to realize the measurement of the complex section, and solves the problem of measuring the axial dimension of the sudden change section of the complex rotary body through data processing
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[0030] Measure with the method of the present invention such as figure 1 The measured rotating body shown needs to measure the axial dimension of each sudden change section, and the realization steps are as follows:
[0031] 1. Place high-precision linear array CCD sensors and parallel light emitters on both symmetrical sides of the revolving body, image the contour of the revolving body on the CCD, and use optical image processing technology to output two measured values in the radial direction of the revolving body at this point , when the CCD sensor moves sequentially along the axial position, two contour lines of the rotating body are obtained, which constitute a longitudinal section of the rotating body. Due to the installation error of the rotating body, there is a certain inclination in the measured shape of the rotating body, such as figure 2 shown.
[0032] 2. Calculate the symmetry axes of the two busbars according to the measured longitudinal section profile da...
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The invention belongs to the technical field of manufacture and measurement of measuring devices, more particularly relates to a high-precision automatic measurement method of axial size of abrupt-change cross section of a revolving body. The measurement method is based on the principles of adopting a high-precision linear array CCD optical imaging technology and a high-precision motion control technology, performing rapid measurement on a contour line at longitudinal section of the revolving body to obtain contour data of the revolving body, calculating curvature change of the contour line ofthe revolving body, and seeking local extremum points of the curvature change on the contour line to obtain the axial position of the abrupt-change cross section, thus calculating the axial size of the abrupt-change cross section. The measurement method is suitable for rapid measurement of the axial size of grooves, benches, frustums and the like of various complex revolving body parts, and the method is especially suitable for revolving body parts which are provided with small-space grooves and can not be easily measured by a contact method.
Description
technical field [0001] The invention proposes a general measuring method for the axial dimension of the sudden change section of the rotary body, which is mainly used for the rapid measurement of the axial dimensions of grooves, steps and cones on the rotary body. Background technique [0002] The rotary body is a common part shape, and its axial dimension often affects the assembly performance or service performance of the part. The rotator has multiple grooves, steps, and truncated cones, etc., and multiple axial dimensions need to be measured. For such a complex rotating body, it has always been a difficult problem to quickly and accurately measure the axial dimensions of grooves, steps and cones. The existing measurement methods can be roughly divided into several types: [0003] 1. Contact direct measurement method: Use measuring tools or instruments such as micrometers, vernier calipers or altimeters to directly measure grooves, steps, etc. This method can measure g...
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IPC IPC(8): G01B11/02G01B11/24G01B11/03
Inventor 徐春广孟凡武郝娟肖定国周世圆贾玉平赵新玉冯忠伟尚妍
Owner BEIJING INSTITUTE OF TECHNOLOGYGY