飞机上的“黑匣子”
<p>马航客机失联一个月，搜救工作仍在继续。目前的最新进展是，澳大利亚搜索船“海洋之盾”号在<span word="MH">MH</span>370疑似失事海域连续两次发现了符合黑匣子频率的脉冲信号，分别持续了140分钟和13分钟。联合协调中心总协调人安格斯•休斯顿认为，这是到目前为止搜索行动取得的最大进展，但确认信号与<span word="MH">MH</span> 370的关联性仍需时间。</p><p>飞机上的黑匣子到底是什么样的仪器，它都有哪些功能，我们一起来了解一下。</p><p><span word="Black">Black</span> <span word="boxes">boxes</span> - <span word="which">which</span> <span word="are">are</span> <span word="actually">actually</span> <span word="orange">orange</span> - <span word="are">are</span> <span word="a">a</span> <span word="group">group</span> <span word="of">of</span> <span word="data">data</span> <span word="collection">collection</span> <span word="devices">devices</span> <span word="mounted">mounted</span> <span word="in">in</span> <span word="the">the</span> <span word="tail">tail</span> <span word="of">of</span> <span word="an">an</span> <span word="aircraft">aircraft</span>.</p><p>黑匣子其实是橙色的，它是安装在飞机尾部的一组数据收集设备。</p><p><span word="Under">Under</span> <span word="internationally">internationally</span> <span word="agreed">agreed</span> <span word="regulations">regulations</span>, <span word="commercial">commercial</span> <span word="aircraft">aircraft</span> <span word="must">must</span> <span word="carry">carry</span> <span word="the">the</span> <span word="equipment">equipment</span> <span word="to">to</span> <span word="record">record</span> <span word="the">the</span> <span word="performance">performance</span> <span word="and">and</span> <span word="the">the</span> <span word="condition">condition</span> <span word="of">of</span> <span word="the">the</span> <span word="aircraft">aircraft</span> <span word="in">in</span> <span word="flight">flight</span>.</p><p>根据国际通行规定，商用飞机必须携带黑匣子来记录飞机在飞行过程中的性能和状况。</p><p><span word="The">The</span> <span word="recorders">recorders</span> <span word="are">are</span> <span word="housed">housed</span> <span word="in">in</span> <span word="immensely">immensely</span> <span word="strong">strong</span> <span word="materials">materials</span>, <span word="such">such</span> <span word="as">as</span> <span word="titanium">titanium</span>, <span word="and">and</span> <span word="insulated">insulated</span> <span word="to">to</span> <span word="withstand">withstand</span> <span word="a">a</span> <span word="crash">crash</span> <span word="impact">impact</span> <span word="many">many</span> <span word="times">times</span> <span word="the">the</span> <span word="force">force</span> <span word="of">of</span> <span word="gravity">gravity</span>, <span word="temperatures">temperatures</span> <span word="of">of</span> <span word="more">more</span> <span word="than">than</span> 1,000 <span word="deg">deg</span> <span word="C">C</span> <span word="for">for</span> <span word="up">up</span> <span word="to">to</span> 30 <span word="minutes">minutes</span> <span word="and">and</span> <span word="the">the</span> <span word="immense">immense</span> <span word="pressure">pressure</span> <span word="of">of</span> <span word="lying">lying</span> <span word="on">on</span> <span word="the">the</span> <span word="seabed">seabed</span>.</p><p>这些记录仪都被装在钛等高强度的材料内，可以承受多倍重力强度的撞击，能在1000摄氏度以上的高温中耐受30分钟，还能承受沉入海底时的水下压力。</p>
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