Warhead fragment position measurement method by using two light filed cameras

The warhead fragments formed by projectile proximity explosion are easily occluded and coincided at the same time, it is very difficult to identify the spatial position of each warhead fragment, which will affect the analysis and research of the launching performance of weapons. To obtain dynamic pa...

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Bibliographic Details
Published in:Microwave and optical technology letters 2019-12, Vol.61 (12), p.2910-2918
Main Authors: Li, Hanshan, Zhang, Xiaoqian, Yan, Keding
Format: Article
Language:English
Subjects:
Algorithms
Binocular vision
Cameras
Computer simulation
digital refocusing
Error analysis
Field cameras
Fragments
light field camera
micro‐lens array
Occlusion
Position measurement
Projectiles
Recognition
spatial position
Test procedures
warhead fragment
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Summary:The warhead fragments formed by projectile proximity explosion are easily occluded and coincided at the same time, it is very difficult to identify the spatial position of each warhead fragment, which will affect the analysis and research of the launching performance of weapons. To obtain dynamic parameter of each warhead fragment, this article proposes a new measurement method by using two light field cameras with micro‐lens array imaging, establishes the spatial position calculation model of warhead fragment, researches the spatial position recognition algorithm of warhead fragment, gives the calculation function of the depth value of the warhead fragment based on digital refocusing principle of light field camera. According to the depth information of the warhead fragment in the optical imaging region, sets up the recognition model and provides the processing algorithm of multiple warhead fragments occlusion and coincidence. In accordance with the spatial position calculation function of warhead fragment, utilizes the differential method to analyze the testing error. Through simulation and experimental analysis, the results of simulation and contrastive testing show that the proposed method can effectively recognize and distinguish the occlusive warhead fragments, which makes up for the shortcomings of the traditional binocular vision testing method.
ISSN:0895-2477
1098-2760
DOI:10.1002/mop.31977