Calibration method for self-adaptive threshold in X-ray on-line detection of joint of wire-cored belt

A technology of adaptive threshold and belt joints, which is applied to measuring devices, material analysis using wave/particle radiation, instruments, etc., can solve problems such as inaccurate joint image calibration, and achieve the effect of reducing calculation load

Inactive Publication Date: 2016-08-31
SHANXI UNIV
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Problems solved by technology

[0006] In order to solve the problem of inaccurate joint image calibration caused by the selection of the threshold value in the traditional joint line cali

Method used

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  • Calibration method for self-adaptive threshold in X-ray on-line detection of joint of wire-cored belt
  • Calibration method for self-adaptive threshold in X-ray on-line detection of joint of wire-cored belt
  • Calibration method for self-adaptive threshold in X-ray on-line detection of joint of wire-cored belt

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Embodiment Construction

[0053] The self-adaptive threshold calibration method in the X-ray on-line detection of steel wire belt joints comprises the following steps:

[0054] Step 1: Set the connector counter to 0;

[0055] The second step: read each image of the video stream one by one online, if the joint counter is greater than or equal to the given number of joints in the database, then go to the eighth step;

[0056] Step 3: Otherwise, sample one line every 30 lines of the read image, calculate the linear texture code of the sampled line, so as to obtain the number of steel wire cores in the sampled line, and read in the image to obtain the maximum number, minimum number, and average number of steel wire cores and the variance;

[0057] the fourth step: Make a judgment, the read-in image that satisfies the formula is the image that contains the assumed joint area, otherwise go to the second step to read the next image in the video stream;

[0058] Step 5: Count the histogram of the number of...

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Abstract

The invention relates to an on-line detection method for a belt joint, specifically to a calibration method for a self-adaptive threshold in X-ray on-line detection of a joint of a wire-cored belt. The method comprises the following steps: zeroing a joint counter; reading in each image of a video stream one by one on line; sampling the images so as to obtain numbers of wire cores, a maximum number of wire cores, a minimum number of wire cores and an average number of wire cores; substituting the results obtained in the previous step into a variance calculating formula and reading in a next image if the formula is not satisfied, or implementing a next step if the formula is satisfied; going through all the sampling rows and caliberating rows with wire core numbers greater than an optimal threshold as joint rows, otherwise as common rows; and recording the initial position and end position of a joint area so as to obtain the height of the joint area, wherein the joint area is defined as an area with given height and with a joint row count greater than a given threshold, adding 1 to the joint counter, storing the joint area into a memory and reading in a next image. The method provided by the invention overcomes the problem of inaccurate calibration of the joint image due to empirical selection of a threshold in joint row calibration in the prior art.

Description

technical field [0001] The invention relates to an on-line detection method for a belt joint, in particular to an adaptive threshold value calibration method in the X-ray on-line detection of a steel wire belt joint. Background technique [0002] Steel cord conveyor belt has the advantages of good impact resistance, high tensile strength, small elongation, strong overload capacity, stable and reliable operation, etc. It has been widely used in various industries such as coal mines, building materials, logistics, and metallurgy. As the "main artery" of enterprise transportation, the conveyor belt will determine the economic benefits of the enterprise. Reasonable use will reduce manual labor and improve production efficiency. If it cannot be guaranteed to operate safely, it may cause serious consequences. Conveyor belt fracture accidents are often caused by failure to find small defects and repair them in time, and small defects become large defects. Especially for Shanxi Pro...

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Application Information

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IPC IPC(8): G01N23/00
CPCG01N23/00G01N2223/303
Inventor 郭大波申红燕秦文兵
Owner SHANXI UNIV
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