A method for detecting twitching of steel wire rope conveyor belt joints
A detection method and wire rope technology, applied in the field of non-destructive testing, can solve the problems of inaccurate detection of joint points, multiple interference points in detection results, and inability to self-adaptive detection, etc. Effect
Active Publication Date: 2019-02-15
NANJING INST OF TECH
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Problems solved by technology
[0003] Existing joint twitch detection algorithms include: 1) using the gray level information in the joint field to detect joints, which is not accurate for the detection of split threads at joint points; 2) joint detection methods based on gray scale Y-difference, which There are many interference points in the test results of the method; 3) Using the digital ruler technology to measure the length of the joint requires the measurer to click on both ends of the joint or use the digital ruler to measure and calculate the stretching length
It can be seen that these methods have certain limitations, and the joint point detection is not accurate or cannot be adaptively detected.
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[0059] First, define the transmission direction of the wire rope conveyor belt as the positive direction of the y-axis, such as figure 1 As shown, the X-ray image of the wire rope conveyor belt obtained from the detection equipment is taken along the positive direction of the y-axis in the X-ray image of the wire rope conveyor belt, such as figure 1 The steel wire rope marked in light color as shown in , is in the opposite direction to the y-axis, such as figure 1 For the wire rope marked in dark color as shown in , the wire rope joints of the two parts are processed separately. It is assumed that the image obtained from an image acquisition at the beginning of the system operation is used as the original image, and the collected image is used as the image to be detected when the system is run again.
[0060] Then, detect the pick-up and delivery twitch of the wire rope according to the following steps:
[0061] Step 1: Detect the joint end points of the two parts of the wir...
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The invention aims to solve a problem of difficulty in wire rope conveyer belt twitch detection and relates to a wire rope conveyer belt joint twitch detection method. The method comprises steps that on the basis of X-ray image characteristics of a wire rope conveyer belt, firstly, a joint end point of a wire rope is detected; secondly, end points are layered; according to the layered end points, line fitting is carried out, and gradient unification of a line after fitting is carried out to acquire a combined fitting line; distances from an original image and a to-be-detected image joint to the combined fitting line are respectively calculated; lastly, image matching is carried out, and distances from corresponding joints of the original image and the to-be-detected image to the combined fitting line are compared, if comparison difference is greater than a certain threshold, twitch is generated. Through the method, relatively high detection accuracy is guaranteed, good timeliness is realized, and detection efficiency is high.
Description
technical field [0001] The invention relates to the field of non-destructive testing, in particular to a non-destructive testing method for steel wire rope conveyor belt twitching. Background technique [0002] Wire rope conveyor belt is one of the main conveying equipment in today's modern production, suitable for material conveying in coal mines, mines, ports, electric power, metallurgy, building materials and other industries. The rubber of the conveyor belt is embedded with a steel wire rope longitudinally. The steel wire rope inside the conveyor belt adopts a parallel structure with high strength. However, during the operation of the steel cord conveyor belt, the joints often twitch due to excessive external force, which may cause the conveyor belt to break. Bring greater losses to production. Therefore, it is necessary to detect the joint twitch of the steel cord conveyor belt. [0003] Existing joint twitch detection algorithms include: 1) using the gray level infor...
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IPC IPC(8): G06T7/00G06T7/136G06T7/187B65G15/48
CPCB65G15/48G06T7/001G06T2207/10116
Inventor 焦良葆陈瑞曹雪虹程勇韩现代
Owner NANJING INST OF TECH