隱形防護罩也許不再是科幻故事裡的東西!
(2015年11月29日)
隱形防護罩也許不再是科幻故事裡的東西!上禮拜波音公司的工程師被授予「衝擊波衰減」系統的專利(US8,981,261)，它的功能就像一個熱氣隱形防護罩可以保護被爆炸攻擊的軍人。
Brian Tillotson看到在伊拉克跟阿富汗受傷的軍人而得到這主意。「我們對炮彈碎片的防護越做越好"Tillotson告訴Live Science「但他們還是會腦部受傷。"車子上的裝甲可以防止爆炸的碎片，但衝擊波可以直接穿入裝甲跟人體。
這系統可以攔截衝擊波用加熱後的離子化空氣當防護罩，它可以改變激烈衝擊波的速度，強迫它彎曲不碰到目標。Tillotson說:這過程就像鏡片彎曲光的時候一樣。
這系統有兩個主要的原件:感應器跟電弧產生器。當感應器偵測到衝擊波時，它可以分辨衝擊波與要保護的目標的距離與方向(例如一群軍人)。感應器會跟電弧產生器做聯繫，電路的兩端與一個大型發電機連接。只要有足夠的電流，一道電弧會在電路的兩端中間流動，這電弧會讓空氣的粒子發熱產生能量。
有些波會在比較熱的空氣傳送更快。所以當衝擊波撞上熱空氣防護罩，它會加速改變方向，離開圓弧裡面的東西。"用一個凸透鏡你可以集中光"Tillotson說另一方面"一個凹形鏡會讓它擴散。"當它擴散後就會變弱，然後被反彈。
除了用電弧產生器，空氣也可以用雷射或微波束來變熱。
BOEING PATENTS 『STAR WARS』-STYLE FORCE FIELDS
A new patent granted to aircraft, defense and security company Boeing is taking its cues from science fiction. Just like the glowing energy shields seen protecting troops, machines and even spacecraft in Star Wars and Star Trek, the design — named 「Method and system for shockwave attenuation via electromagnetic arc」 — uses energy to deflect potential damage.
As it is described, the system is not designed to prevent direct impact from shells or shrapnel; rather, it is designed to protect a target — such as a vehicle or building — from the damaging effects of shockwaves from a nearby impact.
The patent is for a shockwave attenuation system, which consists of a sensor capable of detecting a shockwave-generating explosion and an arc generator that receives the signal from the sensor to ionise a small region, producing a plasma field between the target and the explosion using lasers, electricity and microwaves.
This small plasma field would differ from the surrounding environment in temperature, density and/or composition. This would provide a buffer between the target and the explosion that would hinder the shockwaves from reaching and damaging the target.
「Such embodiments as described above may reduce the energy density of the shockwave by creating a second medium in the path of the advancing shockwave that reflects, refracts, absorbs and deflects at least a portion of the shockwave,」 the patent reads.
Because this system heats and ionises the air, it is eminently unsuitable for enveloping a target and being held in place for any length of time. That kind of force field is technically feasible — physics students last year determined that an electromagnetic field could by used to hold a plasma shield in place — but it would likely also deflect light, leaving anyone inside blind as a bat.
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