Large-size reinforced concrete target plate penetration hole three-dimensional contour measurement method

Abstract

The invention discloses a large-size reinforced concrete target plate penetration hole three-dimensional contour measurement method. A scanner is used for scanning a target plate and a rocket sled guide rail to obtain three-dimensional point cloud data of the target plate and the rocket sled guide rail. After penetration, the feature points of the hole opening of the bullet hole are scanned by using the scanner to obtain three-dimensional point cloud data of the hole opening of the bullet hole. A three-dimensional initial coordinate system is created, and the three-dimensional point cloud datais completely imported into the initial coordinate system. The video data of the inner cavity of the bullet hole is collected and converted into three-dimensional point cloud data to be imported intothe initial coordinate system. The three-dimensional point cloud data under the initial coordinate system is completely imported into reverse engineering software. The reverse engineering software isused for extracting the bullet hole axis of the bullet hole inner cavity to serve as the flight path of the bullet body. With application of the method, the flight path and the inflection point of the bullet body in the penetration target plate can be effectively and accurately measured, and association with the ground horizontal plane and the rocket sled can be established.

Description

technical field [0001] The invention relates to the technical field of penetration test measurement, in particular to a method for measuring the three-dimensional profile of a large-scale reinforced concrete target plate penetration bullet hole. Background technique [0002] Reinforced concrete target plate penetration test is often used to study the penetration performance of projectiles. In large-scale tests, the thickness of reinforced concrete slabs can reach several meters or even tens of meters. After the projectile penetrates, a penetration hole will be left in the target plate. According to The different sizes of projectiles are between 20cm and 50cm in diameter. Accurately measure the three-dimensional contour inside the projectile hole to obtain the diameter at different sections and the bending change of the projectile hole, which can provide data support for analyzing the process of projectile penetration. Due to the huge size of the target plate and the narrow a...

AI Technical Summary

Problems solved by technology

Due to the huge size of the target plate and the narrow and curved interior of the bullet hole, currently only the straight-line distance between the entrance and exit of the bullet hole can be measured, and it is difficult to achieve high-precision measurement of the internal shape of the bullet hole

In the measurement of small-sized (target plate thickness less than 1m) target plates in the laboratory, resin can be poured into the bullet hole and extracted after the resin is cured, but this method is difficult to implement in the measurement of large-scale reinforced concrete target plates

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