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Target plate perforation damage characteristic measurement method, system and ballistic deflection measurement method

A measurement method and target plate technology, applied in the direction of measurement devices, instruments, scientific instruments, etc., can solve the problems of complex solution process, low accuracy, time-consuming and laborious, etc., and achieve the effect of simple shooting method, high precision and high efficiency

Active Publication Date: 2021-10-08
NORTHWEST INST OF NUCLEAR TECH
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  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems of time-consuming, labor-intensive, complex solution process and low accuracy of the existing target plate perforation test method, the present invention proposes a target plate perforation damage feature measurement method based on the principle of digital image processing

Method used

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  • Target plate perforation damage characteristic measurement method, system and ballistic deflection measurement method
  • Target plate perforation damage characteristic measurement method, system and ballistic deflection measurement method
  • Target plate perforation damage characteristic measurement method, system and ballistic deflection measurement method

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Embodiment Construction

[0108] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0109] Step 1. Obtain a clear target plate damage image through a digital camera;

[0110] 1.1. Configure a suitable light source and reference scale, set a suitable image size (pixel), adjust the digital camera’s aperture, shutter, shooting distance and other parameters, and select a suitable shooting method to obtain a clear target image;

[0111] In digital image processing, pixels are used as the basic unit, and the measurement accuracy of this method is:

[0112] δ=L c / N c (1)

[0113] Among them, L c is the actual length of the ruler, N c is the pixel value corresponding to the ruler.

[0114] 1.2. Metal plate perforation damage image acquisition;

[0115] The "darkroom light-transmitting photography method" is used to shoot the perforated damage of the metal plate, such as figure 1 As shown, the obtained perforation image is I1....

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Abstract

The invention discloses a target plate perforation damage characteristic measurement method, system and ballistic deflection measurement method, through MATLAB programming to realize the automatic identification, extraction and storage of damage characteristic parameters such as the number, position, size and damage coverage of perforation, which belongs to field of photogrammetry. The method includes the following steps: step 1: image acquisition of target plate damage; step 2: image preprocessing; step 3: image binarization; step 4: extraction of damage characteristic parameters; step 5: storage and output of measurement results. This measurement method solves the problem that it is difficult to accurately measure the perforation characteristic parameters and damage coverage. It is suitable for the measurement of perforation damage parameters of different sizes of metal targets, different shapes and sizes, and different distribution ranges. The image recognition test technology has high precision and high efficiency. It has a wide range of application prospects in the damage effect test.

Description

technical field [0001] The invention belongs to the technical field of camera measurement of damage effects, and proposes a method and system for measuring the damage characteristics of target plate perforation based on image processing. Background technique [0002] A large number of fragments will be produced during the ultra-high-speed impact of the projectile on the metal sheet. The test and analysis of the state of the fragments is an important content of the ultra-high-speed impact mechanism and damage effect research. The effect target is arranged in the experiment. common means. The fragments produced by the ultra-high-speed impact have a relatively high speed, causing damage to the target plate such as perforation, cratering, bulging, tearing and deformation. The number of holes on the effect target is large, the shapes are different, and some are small in size. It is not only time-consuming and labor-intensive to measure by manual methods, but also difficult to me...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/01
CPCG01N21/01G01N2021/0181
Inventor 陈春林李名锐周刚冯娜马坤王可慧王长利
Owner NORTHWEST INST OF NUCLEAR TECH