A visual real-time detection method for high-speed periodic motion

A periodic motion and real-time detection technology, applied in the field of visual inspection, can solve problems such as multi-noise interference, large amount of calculation, complex algorithm, etc., and achieve the effect of simplifying system equipment and fast visual inspection

CN108364306BActive Publication Date: 2020-11-24BEIJING UNIV OF CIVIL ENG & ARCHITECTURE
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2020-11-24

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Abstract

The invention relates to a real-time visual detection method for high-speed periodic motions, and belongs to the technical field of visual detection. The real-time visual detection method comprises the following steps of: extracting features of a periodic motion; obtaining a circumferential angle of the periodic motion; establishing a high-frame rate image sample library on the basis of the circumferential angle of the periodic motion; and carrying out real-time visual detection and exception extraction on the basis of the high-frame rate image sample library. The method is a monocular cameraand periodic feature mark-based rapid detection algorithm, and is capable of carrying out lossless and visualized real-time detection on periodic mechanical motions, automatically extracting exceptionconditions and then realizing real-time visual detection for periodic motions at high speeds.
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Description

technical field

[0001] The invention relates to the technical field of visual detection, in particular to a visual real-time detection method for high-speed periodic motion. Background technique

[0002] Visual detection technology is more and more used in the production and life of human society. The conventional visual technology is to use the camera to collect the target image, save the video image data in the computer, and study the corresponding image processing and video processing algorithms to complete the Automatic detection and recognition of visual images. According to the real-time processing speed, visual inspection technology can be divided into two categories: ordinary visual inspection and high-speed visual inspection. Ordinary visual inspection systems usually have a real-time processing speed of 25-30 frames per second, and the processing speed of high-speed visual real-time detection is generally above 128 frames per second, which is used to collect and d...

Examples

Embodiment Construction

[0049] The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0050] Embodiments of the present invention provide a visual real-time detection method based on high-speed periodic motion of a high-speed camera, such as figure 2 As shown, the visual real-time detection method includes three parts: periodic motion feature extraction, high frame rate image sample library establishment, and high-speed visual real-time detection. The specific implementation process of these three parts is introduced in detail below:

[0051] 1. Periodic motion feature extraction

[0052] (1) Pre-store high frame rate image data

[0053] The target to be tested is a high-speed periodic motion, which belongs to the reciprocating periodic motion driven by a motor, and can perform multiple periodic operations in one second. Look for motor-driven circular motion areas and attach labels to circular motion parts. Utilize...