2010年03月22日
科幻電影《星空奇遇記》（ Star Trek）中，用「力場保護罩」（ force field）抵禦敵人攻擊的情節，可能成真。英國科學家正研究利用脈衝，為坦克製造一道強大電磁場，變成隱形保護罩抵禦炮彈攻擊。
英國國防部研發機構國防科技實驗室透露，將來有望把儲存能量的元件「超級電容器」融合到裝甲物料上，變身成一種巨大電流磁場防護罩。當裝甲車和坦克遇襲時，超級電容器上的能量可迅速傳導到金屬外殼，產生強力電磁場，形成一個短暫的「力場保護罩」，抵禦子彈炮彈。
保護罩每次只能維持幾分之一秒，但可迅速充電應付另一次攻擊。專家詹姆斯說：「人們以為要耗費大量能源，但實驗發現其實只要很少電能就能做出效果」。
英國《星期日電訊報》
http://hk.apple.nextmedia.com/template/apple/art_main.php?iss_id=20100322&sec_id=15335&subsec_id=15339&art_id=13846608
星空奇遇式的力場裝甲 正在由軍事科學家研製
Star Trek-style force-field armour being developed by military scientists
A space-age "force field" capable of protecting armoured vehicles and tanks by repelling incoming fire is being developed by British military scientists.
一太空時代的“力場”用以擊退來犯的炮火，有能力保護裝甲車輛和坦克，正在由英國的軍事科學家發展中。
By Richard Gray, Science Correspondent
Published: 2:08PM GMT 20 Mar 2010
When a threat from incoming fire is detected by the vehicle, the energy stored in the supercapacitor can be rapidly dumped onto the metal plating on the outside of the vehicle, producing a strong electromagnetic field. Photo: AP/Bruce Adams當來犯炮火的威脅被車輛探測到，儲存在超級電容器的能量，能迅速傾倒至車輛外面的金屬鍍板，產生強大的電磁場。 圖片：美聯社 /布魯斯亞當斯
The new type of armour will use pulses of electrical energy to repel rockets, shrapnel and other ammunition that might damage a vehicle.
Researchers at the Defence Science and Technology Laboratory (Dstl), which is the research and development arm of the Ministry of Defence, claim it is possible to incorporate material known as supercapacitors into armour of a vehicle to turn it into a kind of giant battery.
When a threat from incoming fire is detected by the vehicle, the energy stored in the supercapacitor can be rapidly dumped onto the metal plating on the outside of the vehicle, producing a strong electromagnetic field.
Scientists behind the project claim this would produce a momentary "force field" capable of repelling the incoming rounds and projectiles.
Although it would last for only a fraction of a second, if timed correctly it could prevent rocket propelled grenades, which detonate on impact, from reaching their target. The supercapacitor could then be rapidly recharged ready for another attack.
The idea is similar to the force fields portrayed in science fiction movies which produce an invisible protective shell around a vehicle or object.
Professor Bryn James, head of Dstl's armour and protection science and technology centre, said the electric armour had the potential to dramatically decrease the weight of military vehicles and tanks.
Currently few tanks are able to carry enough armour needed to resist impacts from RPG rounds, which produce jets of molten copper capable of punching through more than foot of solid steel upon impact.
He said: "The supercapacitor material can be charged up and then discharged in one powerful event to repel incoming fire.
"You would think this would require huge amounts of energy, but we have found it can be done with surprisingly small amounts of electrical power.
"Conventional armour is just a lump of metal but an RPG round can punch through more than a foot of steel. Carrying around enough armour to protect against that is extremely heavy.
"The real advantage to the electric armour is how light it can be by comparison."
Sophisticated tracking systems will also need to be developed to work in conjunction with the new armour so that incoming threats can be identified and the electrical discharge timed correctly to repel the rocket.
It is unlikely that such a system would be used against fire from small arms as the outer skin can be made to be bullet proof.
Armour piercing rounds, RPGs and "shaped charge" roadside bombs pose a far greater threat to armoured vehicles and tanks as it is not possible to put enough armour plating on all parts of the vehicle to protect it completely.
The comparatively lightweight electric armour, however, could be used to protect the entire outer shell of a vehicle by using a thin cloth-like flexible supercapacitor material.
This can be used to form a lining beneath the armour that turns the vehicle into a giant battery pack.
An early incarnation of a different type of electric armour technology has already been trailed by Dstl.
It used several layers of metal which have electric current flowing through them.
When an RPG round penetrates the outer layer, it completes the electrical circuit creating a highly electrically charged field between the layers.
This charged field vaporises the copper jet that shoots out from the front of the RPG warhead, preventing it from penetrating the inner hull of the vehicle and keeping the soldiers inside safe.
At a test in 2002, senior British Army officers saw the chassis of a Warrior infantry carrier, which was fitted with the early electric armour, survive repeated attack by RPGs before being driven away with only minor damage.
Scientists from Dstl outlined their plans to use this technology at an MoD showcase of military technology last week.
The MoD has tasked Dstl with reducing the weight of armoured vehicles by 70 per cent over the next decade in a bid to improve speed and manoeuvrability.
Dstl has also developed an experimental armour steel that is covered in holes known as Super Bainite, which could also be used on vehicles.
Scientists found they could double the ballistic performance of the armour by introducing the holes to the steel, while halving its weight.
Professor Peter Brown, who headed the Dstl team that developed Super Bainite, said: "This is because when a bullet hits, it's always near to the edge of a hole.
"This causes the bullet to topple over, turning it from a sharp projectile to a blunt fragment which is easier to stop."
http://www.telegraph.co.uk/technology/news/7487740/Star-Trek-style-force-field-armour-being-developed-by-military-scientists.html
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