WIFI信號可用於安檢了？國外這項新技術令人驚喜：不再擔心輻射！
WiFi can be used to spot weapons and bombs inside stadiums and schools, researchers find
研究人員發現，WiFi可用於檢測體育場館和學校內的武器和炸彈
▌ 部分素材來源於《每日郵報》，世界播團隊翻譯
Ordinary WiFi signals could soon become a low-cost security tool for spotting chemicals, bombs and weapons.
普通的WiFi信號可能很快就會成為一種低成本的安全工具，用於檢測化學品、炸彈和武器。
A new study from Rutgers University-New Brunswick demonstrates how wireless signals are able to penetrate bags to detect the exact dimensions of dangerous objects or estimate the volume of liquids.
羅格斯大學新伯朗士威校區的一項新研究表明，無線信號能夠穿透袋子，探測危險物體的確切尺寸或估計液體的體積。
After several trials, the researchers found that the system was at least 95 percent accurate.
經過幾次試驗，研究人員發現該方法至少有95%的準確率。
A new study demonstrates how wireless signals are able to penetrate bags to detect the exact dimensions of dangerous objects or estimate the volume of liquids
一項新的研究表明，無線信號是如何穿透塑料袋來探測危險物體的確切尺寸或估計液體的體積的
The researchers hope that the detection system could help make museums, stadiums, theme parks, schools and other public venues safer.
研究人員希望這種探測系統能夠提高博物館、體育場、主題公園、學校和其他公共場所的安全係數。
"This could have a great impact in protecting the public from dangerous objects," Yingying Chen, one of the study"s co-authors, said in a statement.
該研究其中一位合著者陳瑩瑩聲明說，「這可能會對保護公眾免受危險物品傷害起到很大作用。」
"There"s a growing need for that now."
「現在這種需求越來越大。」
Compared to traditional security systems, the researchers say their detection method cuts security screening costs, is easy to assemble and avoids invading privacy by having to open and inspect people"s personal items.
與傳統的安全系統相比，研究人員表示，他們的檢測方法降低了安全篩查成本，裝配簡單，而且不用打開和檢查人們的個人物品，避免了侵犯隱私。
Existing security screening systems also require more staff and may call for expensive specialized equipment, researchers said.
研究人員說，現有的安全檢查系統需要更多的工作人員，可能還需要昂貴的專門設備。
"In large public areas, it"s hard to set up expensive screening infrastructure like what"s in airports," Chen said.
陳瑩瑩說，「在大型公共場所，很難像機場那樣設置昂貴的安檢設施。」
Their system uses a WiFi device with two or three antennas - one that transmits signals and one that receives signals. It analyzes what happens when signals penetrate and bounce off objects
他們的系統使用一個有兩條或三條天線的WiFi設備——一個用來傳輸信號，另一個用來接收信號。該系統分析當信號穿透物體並從物體上反彈時會發生什麼
"Manpower is always needed to check bags and we wanted to develop a complementary method to try to reduce manpower."
「檢查行李總是需要人力，我們希望開發一種互補的方法來減少人力。」
Their system uses a WiFi device with two or three antennas - one that transmits signals and one that receives signals.
他們的系統使用一個有兩條或三條天線的WiFi設備——一個用來傳輸信號，另一個用來接收信號。
It works by analyzing what happens when signals penetrate and bounce off objects and materials.
它的工作原理是分析信號在物體和材料上穿透和反射時會發生什麼。
The system can detect and analyze signals from solid objects like weapons, aluminum cans, laptops and batteries.
該系統可以檢測和分析來自武器、鋁罐、筆記本電腦和電池等固體物體的信號。
It can also estimate the volume of liquids like water, acid, alcohol and other chemicals to see if they contain explosives.
它還可以估計水、酸、酒精和其他化學物質等液體的體積，看看它們是否含有爆炸物。
It"s able to separate the wireless interference caused by "two influencing factors of objects," or material and shape, researchers said.
研究人員說，它能夠分離由「物體的兩個影響因素」（或材料和形狀）引起的無線干擾。
For the study, researchers tested the system with 15 types of objects and six types of bags.
在這項研究中，研究人員用15種物品和6種袋子測試了這個系統。
The system can detect and analyze signals from solid objects like weapons, aluminum cans, laptops and batteries. It can also estimate the volume of liquids like water, acid and alcohol
該系統可以檢測和分析來自武器、鋁罐、筆記本電腦和電池等固體物體的信號。它還可以估計水、酸和酒精等液體的體積
Researchers logged a 99 percent accuracy rate for dangerous objects, 98 percent for metal and 95 percent for liquid. Typical backpacks showed an accuracy rate of 95 percent
研究人員記錄該系統檢測危險物體的準確率為99%，檢測金屬和液體的準確率分別為98%和95%。典型的背包顯示準確率為95%
They logged a 99 percent accuracy rate for dangerous objects, 98 percent for metal and 95 percent for liquid.
他們記錄到檢測出危險物體的準確率為99%，金屬和液體的準確率分別為98%和95%。
Typical backpacks showed an accuracy rate of 95 percent, but that dropped slightly to 90 percent when dangerous objects were wrapped with a substance.
典型的背包顯示出95%的準確率，但是當危險物品被東西包裹時準確率下降到90%。
It comes as more and more public venues are adopting advanced security technologies to keep patrons safe.
如今，越來越多的公共場所開始採用先進的安全技術來保證顧客的安全。
The Transportation Security Administration is now testing checkpoint screening technology that would allow people to use their fingerprint as a form of identification.
美國運輸安全管理局目前正在測試檢查點篩選技術，該技術允許人們使用指紋作為一種身份識別形式。
It could spell the end of boarding passes, as security agents would compare the scanned fingerprint with one that"s already on file.
這可能意味著不再需要登機牌了，因為安檢人員會將掃描後的指紋與已經存檔的指紋進行比對。
For now, the technology is only being tested at select airport locations around the US.
目前，這項技術只在美國部分機場進行測試。
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