Air cannon targeting system based on light interference and multi-level LED illumination

Abstract

The invention relates to the field of experiments of gas guns, in particular to a gas gun targeting system based on light interference multistage LED illumination. The system comprises a target disc and a sample rod; the target disc includes a square metal disc with a round hole in middle; the metal disc is positioned on a rectangular metal platform; a chute is formed in the platform; the bottom of the metal disc is inserted in the chute; the platform is mounted on a circular base; a thread is arranged on the edge of the base, and is connected with a thick thread and a fine thread with handles; and a positioning bolt is mounted on the edge of the base. The device can improve the direct impact precision between a flying piece and a sample surface, guarantees the experiment repeatability, reduces the weight of the sample rod, increases the activity of a target table, is easy to operate in a target chamber with limited space, simplifies the target progress, improves the targeting precision, and increases the parallel error of the target surface and the surface of the impacted flying piece from traditional millimeter grade to micron dimension.

Description

technical field [0001] The invention relates to the field of gas cannon experiments, in particular to a gas cannon target alignment system based on light interference and multi-level LED illumination. Background technique [0002] In the mechanical experiment of the impact gas cannon, such as figure 1 , the projectile is driven by high-pressure gas, and the sample is loaded after the projectile flies through the gun barrel. After the high-speed flight, the projectile hits the target surface fixed in the target chamber. During the experiment, whether the flying piece can touch the target surface in parallel It has a great influence on the experimental results, especially in the measurement of the time width of the rising front of the stress wave during the low-speed impact process. The existing general way to solve this problem is to place a solid metal sample rod in the gun barrel for "targeting" before the experiment. [0003] In today's air cannon experiments, the method...

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Problems solved by technology

[0006] (1) The sample rod made of solid metal is heavy and laborious to operate. Considering the close fit between the sample rod and the inner diameter of the barrel, the operation often takes a long time, and a novice will spend more than an hour. Due to the limited space in the target room, the longer the operation time , the harder it is to align

[0007] (2) Observing the target with the naked eye has a large error, especially when observing the rising front of the stress wave in a low-speed experiment, the error caused by the inaccurate target is difficult to ignore

[0008] (3) Since the target table is made of large pieces of metal, it is heavy and difficult to operate on the target, and misalignment between the target hole and the blast hole is easy to occur. The impact cannot achieve the effect of symmetrical collision

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