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Image-processing-based cable sheath thickness measuring method

A technology for cable sheath and thickness measurement, applied in image data processing, measuring devices, image enhancement, etc., can solve the problem of no application of cable sheath thickness

Inactive Publication Date: 2011-04-27
YANCHENG INST OF TECH
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  • Application Information

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Problems solved by technology

At present, the image measurement technology has been used in many fields, but it has not been applied in the measurement of the thickness of the cable sheath. This is because the cable sheath has its own particularity, and the existing image measurement technology must be carried out according to its specific characteristics. Improve

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  • Image-processing-based cable sheath thickness measuring method
  • Image-processing-based cable sheath thickness measuring method

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Embodiment Construction

[0049] The technical solutions of the present invention will be further described below in conjunction with the drawings and embodiments.

[0050] figure 1 It is a block diagram of the cable sheath thickness measurement system based on image processing. The whole system is mainly composed of software and hardware. The hardware part includes optical lighting system, workbench, CCD camera, image acquisition card, computer system and peripheral interface. The software part mainly runs in the computer system, including image acquisition module, calibration and image processing module, and output display module. The working principle of the measurement system is as follows: the measured cable sheath slice or insulation material slice is placed on the workbench, and the parallel light emitted by the lighting system is irradiated on the surface of the cable sheath or insulation material slice, which is magnified by the lens on the workbench Focus on the photosensitive array surfac...

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Abstract

The invention discloses an image-processing-based cable sheath thickness measuring method, which overcomes the defects of low precision, high error, low efficiency and the like of the traditional geometrical measurement method. The method comprises the following steps of: pre-processing an acquired cable sheath slice image by using a K-nearest neighbor filter, processing the image by adopting an improved Sobel edge detection method, thinning edge pixel points, extracting inner and outer contours of the cable sheath, performing sub-pixel positioning by adopting a polynomial interpolation method, and finally detecting the inner and outer edge thicknesses of the cable sheath of national standard specifications. The method for measuring the cable sheath has the advantages of high measurement precision, low measurement error, large dynamic range, good flexibility and the like.

Description

technical field [0001] The invention relates to a method for measuring the thickness of a cable sheath, in particular to a method for measuring the thickness of a cable sheath based on image processing Background technique [0002] At present, the thickness measurement of cable sheath materials and insulating materials still adopts traditional contact-based geometric measurement methods. The detection methods mainly include calipers, gauges, pointer thickness gauges, microscopes, projectors, etc. With the development and progress of modern industry, these traditional measurement methods can no longer meet the needs of production. These measurement methods can only measure the thickness between the selected two points at a time, not only the workload is large, the efficiency is low, and the measurement error In addition to the error of the instrument itself, it is also related to the error of aiming and positioning, and the deformation of the sliced ​​material due to contact....

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Application Information

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IPC IPC(8): G01B11/06G06T5/00G06T7/00
Inventor 王吉林戴红霞夏菽兰魏昕赵力
Owner YANCHENG INST OF TECH
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