A Microfluidic Fuze Security Mechanism for Small Caliber Ammunition
A microfluidic, small-caliber technology, used in fuzes, offensive equipment, weapon accessories, etc., can solve the problems of complex mechanical structure and difficulty in miniaturizing fuzes, and achieve the effect of large contact area, low contact resistance, and ensuring safety.
Active Publication Date: 2022-03-22
NANJING UNIV OF SCI & TECH
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Problems solved by technology
This micro-mechanical safety device is made of stainless steel wet-etching process, the mechanical structure is complex, and it is difficult to miniaturize the fuze
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[0022] The present invention will be further introduced below in conjunction with the accompanying drawings and specific embodiments.
[0023] combine Figure 1-Figure 4 , a small-caliber ammunition microfluidic fuze security mechanism of the present invention, comprising a substrate, a cover plate 2, a microchannel 4, metal droplets, a first pair of electrodes 1, and a second pair of electrodes 3; the microchannel 4 is arranged on the substrate Above, the seal between the base and the cover plate 2 prevents the metal droplets from splashing out of the microchannel 4; It is connected with the centrifugal delay part through the air guide channel 15.
[0024] The recoil partition structural part includes a U-shaped liquid storage tank 5, a first capillary valve 6, a second capillary valve 17, a curved channel 16, and a closed channel 7; one end of the U-shaped liquid storage tank 5 is a short side end, and the other end is a The long side end and the upper end of the short sid...
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The invention discloses a small-caliber ammunition microfluidic fuze security mechanism, which comprises a base, a cover plate, two pairs of metal electrodes, a microchannel, and a metal droplet cover plate located at the upper end of the base, and the two are sealed; the base is provided with a microchannel , the metal electrode is set on the cover plate; the microchannel includes a U-shaped reservoir and a semi-elliptical reservoir, a capillary valve, a straight channel, a time-delay channel, a U-shaped locking channel and a gas guide channel; the metal droplet is located in the liquid storage pool; the first pair of electrodes is in the recoil section, and the second pair is in the centrifugal delay part; when the recoil force received by the environment is greater than its threshold value, the droplet breaks through the capillary valve, conducts the first pair of electrodes, and the first insurance is released; in the centrifugal Under load, the droplet flows through the delay channel and finally flows to the metal electrode of the centrifugal blocking channel, and the electrode is turned on to realize the release of the second insurance; the invention introduces microfluidics into the fuze safety system, making the small-caliber fuze structure It is more miniaturized, the contact is more stable and reliable, and it has the characteristics of long-distance unlocking.
Description
technical field [0001] The invention belongs to the technical field of fuze safety, in particular to a small-caliber ammunition microfluidic fuze safety mechanism. Background technique [0002] At present, in the design of fuze safety systems for small-caliber projectiles at home and abroad, the mechanical safety mechanism is relatively mature, and the safety mechanism is mainly released by identifying the recoil and centrifugal load in the launch environment. Meet the requirements of the safe distance. The current small-caliber bombs usually use a mechanical explosion-proof safety mechanism, coupled with a mechanical delay device, resulting in a complex structure and increased volume, which is not conducive to the miniaturization and integration of the fuze. The invention belongs to the microfluidic technology in the field of MEMS, has simple structure and tiny volume, and can be used for miniaturized integration in small-diameter fuzes. [0003] In 2018, Ji-hun Jeong of ...
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IPC IPC(8): F42C15/40
CPCF42C15/40
Inventor 聂伟荣丘伟祥曹云席占稳张润铎
Owner NANJING UNIV OF SCI & TECH