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An elongation at break measurement method and device and electronic equipment

A technology of elongation at break and measurement method, which is applied in the field of calculation method of elongation at break, device and electronic equipment, can solve the problems of low accuracy of manual measurement, and achieve high precision, efficient execution, and easy operation

Pending Publication Date: 2021-10-15
成都产品质量检验研究院有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of this, the object of the present invention is to provide a kind of elongation at break measurement method, device and electronic equipment, based on the pyramid L-K (Lucas-Kanada) optical flow method to track the feature points and calculate the acceleration and spacing of the feature points in real time, through the acceleration The threshold automatically determines the moment when the cable protective sheath breaks, which solves the problem of low accuracy of the existing manual measurement

Method used

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  • An elongation at break measurement method and device and electronic equipment
  • An elongation at break measurement method and device and electronic equipment
  • An elongation at break measurement method and device and electronic equipment

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Embodiment 1

[0037] This embodiment provides a method for measuring elongation at break, such as figure 1 A flow chart of a method for measuring elongation at break shown, the method for measuring elongation at break includes:

[0038] Step S110, acquiring each frame of image information of the cable protective sheath to be tested during the measurement process;

[0039] Prior to measurement, draw black circle markers at both ends of the cable sheath to be tested to construct feature points. The camera faces the measuring instrument and is connected to the computer to collect and transmit image data during the measurement in real time. The camera uploads the video to the computer, and the computer obtains each frame of image information of the cable sheath to be tested and records the image information.

[0040] Step S120, preprocessing the image information to determine the target feature points of the cable sheath to be tested;

[0041] After the computer obtains each frame of image in...

Embodiment 2

[0131] The embodiment of the present application provides a kind of elongation at break testing device, see Figure 8 A schematic diagram of the structure of a measuring device for elongation at break shown, the measuring device for elongation at break 810 includes:

[0132] An image acquisition module 820, configured to acquire each frame of image information of the cable sheath to be tested during the measurement process;

[0133] The feature point determining module 830 is used to preprocess the image information to determine the target feature point of the cable sheath to be tested;

[0134]The acceleration calculation module 840 is used to track the target feature points in each frame of image information based on the streamer method, and calculate the distance and acceleration of the target feature points;

[0135] The fracture determination module 850 is used to determine the previous frame of image information when the cable protective sheath to be tested is broken ba...

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Abstract

The invention provides an elongation at break measurement method and device and electronic equipment, and the method comprises the steps of obtaining the information of each frame of image of a to-be-measured cable protection sleeve in a measurement process; preprocessing the image information, and determining a target feature point of the to-be-detected cable protection sleeve; tracking a target feature point in each frame of image information based on a streamer method, and calculating a distance and an acceleration of the target feature point; based on the acceleration of the target feature point, determining the information of a previous frame of image when the to-be-detected cable protective sleeve is fractured; according to the first frame of image information of the cable protection sleeve to be detected and the previous frame of image information during fracture, determining an initial feature point distance and a fracture instant feature point distance; and determining the elongation at break of the to-be-detected cable protection sleeve according to the initial feature point spacing and the fracture instant feature point spacing. According to the invention, the feature points on the cable are tracked through the optical flow method, and the abrupt change of the acceleration is used as the judgment condition of cable fracture, so that the problem of low manual measurement precision is solved.

Description

technical field [0001] The invention relates to the technical field of computer vision, in particular to a method, device and electronic equipment for calculating elongation at break. Background technique [0002] Cable protective sheath is the most common electrical insulation material for protecting wires and cables. It is widely used because of its good insulation, high chemical stability, no rust, no aging, and adaptability to harsh environments. In cable protection It is especially important to test the performance of the kit before it is put into use. [0003] At present, the elongation at break of the cable protective sheath is measured manually, which has poor stability and low precision. In the existing optical flow method, due to the lack of feature point screening process, all the detected feature points will be tracked, and it is difficult to achieve the tracking task of specific target points. [0004] Based on this, how to realize the tracking of specific tar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/246G06T5/00G06T7/136G06T7/187G06T7/62G06T7/66G06T7/90G06K9/62
CPCG06T7/246G06T7/136G06T7/187G06T7/62G06T7/66G06T7/90G06T2207/20016G06T2207/20164G06F18/22G06T5/70
Inventor 胡丹曾轲唐清泉唐炬吴维翔张文龙赵瑞麒
Owner 成都产品质量检验研究院有限责任公司