emc趣闻2.htm

该资料时关于EMC的相关问题

    Arial;mso-hansi-font-family:Arial;mso-bidi-font-family:Arial'>、美国洛杉矶</span><span
    lang=EN-US style='font-size:9.0pt;font-family:Arial'>Hartman</span><span
    style='font-size:9.0pt;font-family:宋体;mso-ascii-font-family:Arial;
    mso-hansi-font-family:Arial;mso-bidi-font-family:Arial'>公司已同意支付</span><span
    lang=EN-US style='font-size:9.0pt;font-family:Arial'>60000</span><span
    style='font-size:9.0pt;font-family:宋体;mso-ascii-font-family:Arial;
    mso-hansi-font-family:Arial;mso-bidi-font-family:Arial'>美元的民事罚款，以补偿其</span><span
    lang=EN-US style='font-size:9.0pt;font-family:Arial'>1992</span><span
    style='font-size:9.0pt;font-family:宋体;mso-ascii-font-family:Arial;
    mso-hansi-font-family:Arial;mso-bidi-font-family:Arial'>年生产的型号为</span><span
    lang=EN-US style='font-size:9.0pt;font-family:Arial'>Hartman Pro1600</span><span
    style='font-size:9.0pt;font-family:宋体;mso-ascii-font-family:Arial;
    mso-hansi-font-family:Arial;mso-bidi-font-family:Arial'>的吹风机由于本身的缺点所带来的损失。美国消费品安全委员会（</span><span
    lang=EN-US style='font-size:9.0pt;font-family:Arial'>CPSC</span><span
    style='font-size:9.0pt;font-family:宋体;mso-ascii-font-family:Arial;
    mso-hansi-font-family:Arial;mso-bidi-font-family:Arial'>）认为，这些吹风机在开</span><span
    lang=EN-US style='font-size:9.0pt;font-family:Arial'>/</span><span
    style='font-size:9.0pt;font-family:宋体;mso-ascii-font-family:Arial;
    mso-hansi-font-family:Arial;mso-bidi-font-family:Arial'>关旋钮处于“断开”位置时能自动接通电源。当加热器工作时，其风扇不转，可能引起内部器件过热而发生火灾。</span><span
    lang=EN-US style='font-size:9.0pt;font-family:Arial'><br>
    <br>
    8</span><span style='font-size:9.0pt;font-family:宋体;mso-ascii-font-family:
    Arial;mso-hansi-font-family:Arial;mso-bidi-font-family:Arial'>、美国汽车协会（</span><span
    lang=EN-US style='font-size:9.0pt;font-family:Arial'>AA</span><span
    style='font-size:9.0pt;font-family:宋体;mso-ascii-font-family:Arial;
    mso-hansi-font-family:Arial;mso-bidi-font-family:Arial'>）与地区咨询委员会（</span><span
    lang=EN-US style='font-size:9.0pt;font-family:Arial'>RAC</span><span
    style='font-size:9.0pt;font-family:宋体;mso-ascii-font-family:Arial;
    mso-hansi-font-family:Arial;mso-bidi-font-family:Arial'>）评价</span><span
    lang=EN-US style='font-size:9.0pt;font-family:Arial'>1996</span><span
    style='font-size:9.0pt;font-family:宋体;mso-ascii-font-family:Arial;
    mso-hansi-font-family:Arial;mso-bidi-font-family:Arial'>他们维护的大约</span><span
    lang=EN-US style='font-size:9.0pt;font-family:Arial'>9000</span><span
    style='font-size:9.0pt;font-family:宋体;mso-ascii-font-family:Arial;
    mso-hansi-font-family:Arial;mso-bidi-font-family:Arial'>次的汽车故障是由于射频干扰使遥控键失灵。一位</span><span
    lang=EN-US style='font-size:9.0pt;font-family:Arial'>AA</span><span
    style='font-size:9.0pt;font-family:宋体;mso-ascii-font-family:Arial;
    mso-hansi-font-family:Arial;mso-bidi-font-family:Arial'>发言人说：“目前，生产的具有遥控按键的汽车是有限的，如果我们现在已发现故障达到</span><span
    lang=EN-US style='font-size:9.0pt;font-family:Arial'>9000</span><span
    style='font-size:9.0pt;font-family:宋体;mso-ascii-font-family:Arial;
    mso-hansi-font-family:Arial;mso-bidi-font-family:Arial'>次，那么以后还会出现什么问题呢？”</span><span
    lang=EN-US style='font-size:9.0pt;font-family:Arial'><br>
    <br>
    9</span><span style='font-size:9.0pt;font-family:宋体;mso-ascii-font-family:
    Arial;mso-hansi-font-family:Arial;mso-bidi-font-family:Arial'>、最近，我们买了一个看起来很精巧的玩具之类的东西，它有一个强磁体，许多球状轴承紧紧吸附在它上面，因此它可作为极为精美的雕塑品。当时我们不能实现的是磁铁和办公桌不能很好的贴合在一起。我们发现，当载有数据的磁盘放在它上面时，所有数据均神秘地丢失了，显示屏上同时也出现彩虹状的各种颜色。唯一的可能的原因就是使用了办公桌，因此远离办公室。</span><span
    lang=EN-US style='font-size:9.0pt;font-family:Arial'><br>
    <br>
    10</span><span style='font-size:9.0pt;font-family:宋体;mso-ascii-font-family:
    Arial;mso-hansi-font-family:Arial;mso-bidi-font-family:Arial'>、美国食品及药物管理局（</span><span
    lang=EN-US style='font-size:9.0pt;font-family:Arial'>FDA</span><span
    style='font-size:9.0pt;font-family:宋体;mso-ascii-font-family:Arial;
    mso-hansi-font-family:Arial;mso-bidi-font-family:Arial'>）已对轮椅进行专门的审查，一个月以前，管理局勒令轮椅生产商对其进行屏蔽，同时对用户阐明，其具有潜在的干扰危险。</span><span
    lang=EN-US style='font-size:9.0pt;font-family:Arial'>FDA</span><span
    style='font-size:9.0pt;font-family:宋体;mso-ascii-font-family:Arial;
    mso-hansi-font-family:Arial;mso-bidi-font-family:Arial'>是在收到“关于电动轮椅反复无常的发生意料外运动的许多报告”之后采取行动的。报告中包括，当近旁的民用波段发射机的火警器启动时，轮椅突然起动冲出路沿并掉下桥的事故。令人不可思议的是，至今没有一例致命性损伤的报告。（但由于干扰作用，轮椅有些零部件已损坏。）。</span><span
    lang=EN-US style='font-size:9.0pt;font-family:Arial'><br>
    <br>
    11</span><span style='font-size:9.0pt;font-family:宋体;mso-ascii-font-family:
    Arial;mso-hansi-font-family:Arial;mso-bidi-font-family:Arial'>、大约</span><span
    lang=EN-US style='font-size:9.0pt;font-family:Arial'>1990</span><span
    style='font-size:9.0pt;font-family:宋体;mso-ascii-font-family:Arial;
    mso-hansi-font-family:Arial;mso-bidi-font-family:Arial'>年，艾伦在英国坎伯威尔（</span><span
    lang=EN-US style='font-size:9.0pt;font-family:Arial'>Camberwell</span><span
    style='font-size:9.0pt;font-family:宋体;mso-ascii-font-family:Arial;
    mso-hansi-font-family:Arial;mso-bidi-font-family:Arial'>）铁路段租得一地下废弃的半圆形地下室。他借钱将它改造成录音室与预演室两间，总计费用达好几万英镑。直到</span><span
    lang=EN-US style='font-size:9.0pt;font-family:Arial'>1991</span><span
    style='font-size:9.0pt;font-family:宋体;mso-ascii-font-family:Arial;
    mso-hansi-font-family:Arial;mso-bidi-font-family:Arial'>年</span><span
    lang=EN-US style='font-size:9.0pt;font-family:Arial'>11</span><span
    style='font-size:9.0pt;font-family:宋体;mso-ascii-font-family:Arial;
    mso-hansi-font-family:Arial;mso-bidi-font-family:Arial'>月，这里的生意一直不错。但是，在一个难忘的星期六早上，有三支乐队预订上午演出，另外三支乐队预订下午演出，结果发生了意想不到的故障。所有摄影设备和功放开始发出颤音。一开始，乐队工作人员认为他们的设备出了问题。而在另一间地下室内的其他人员互相打电话，他们都遇到了同样的问题。艾伦打电话到英国铁路公司，星期一早上，一位英国铁路公司的工程师来到这里，现场听了听后说，导致这种情况的原因新安装的信号系统。铁路公司通过使电流在铁轨上流动来控制列车照明灯，当列车经过时，在铁轨间形成短路，从而使列车尾部的红灯点亮。最近，英国铁路公司已决定采用交变电流。长长的铁轨就象效果极佳的天线一般，辐射很强的交流磁场（在摄影室的许多地方，磁场大约在</span><span
    lang=EN-US style='font-size:9.0pt;font-family:Arial'>1</span><span
    style='font-size:9.0pt;font-family:宋体;mso-ascii-font-family:Arial;
    mso-hansi-font-family:Arial;mso-bidi-font-family:Arial'>安</span><span
    lang=EN-US style='font-size:9.0pt;font-family:Arial'>/</span><span
    style='font-size:9.0pt;font-family:宋体;mso-ascii-font-family:Arial;
    mso-hansi-font-family:Arial;mso-bidi-font-family:Arial'>米）。电流电属于音频，音调在</span><span
    lang=EN-US style='font-size:9.0pt;font-family:Arial'>1kHz</span><span
    style='font-size:9.0pt;font-family:宋体;mso-ascii-font-family:Arial;
    mso-hansi-font-family:Arial;mso-bidi-font-family:Arial'>——</span><span
    lang=EN-US style='font-size:9.0pt;font-family:Arial'>4kHz</span><span
    style='font-size:9.0pt;font-family:宋体;mso-ascii-font-family:Arial;
    mso-hansi-font-family:Arial;mso-bidi-font-family:Arial'>间。音调是复杂的颤音，其目的是为了保证整个系统不受外界的干扰。这种颤音从电源线和连接线上被接收到后，从混音台传出来而可以听到。甚至从没有加电的音箱中也能听到（将其电缆线拔掉并将终端短接）。当将电吉它与放大器相连时情况是最糟的。吉它拾音器的工作原理是失去被钢弦振动调制的磁场，然后将其转化为声音。它不能识别磁场是来自于英国铁路公司信号系统还是来自吉它振动的弦。</span><span
    lang=EN-US style='font-size:9.0pt;font-family:Arial'><br>
    <br>
    12</span><span style='font-size:9.0pt;font-family:宋体;mso-ascii-font-family:
    Arial;mso-hansi-font-family:Arial;mso-bidi-font-family:Arial'>、据星期日时报（</span><span
    lang=EN-US style='font-size:9.0pt;font-family:Arial'>SUNDAY TIMES</span><span
    style='font-size:9.0pt;font-family:宋体;mso-ascii-font-family:Arial;
    mso-hansi-font-family:Arial;mso-bidi-font-family:Arial'>）（</span><span
    lang=EN-US style='font-size:9.0pt;font-family:Arial'>98</span><span
    style='font-size:9.0pt;font-family:宋体;mso-ascii-font-family:Arial;
    mso-hansi-font-family:Arial;mso-bidi-font-family:Arial'>年</span><span
    lang=EN-US style='font-size:9.0pt;font-family:Arial'>2</span><span
    style='font-size:9.0pt;font-family:宋体;mso-ascii-font-family:Arial;
    mso-hansi-font-family:Arial;mso-bidi-font-family:Arial'>月</span><span
    lang=EN-US style='font-size:9.0pt;font-family:Arial'>15</span><span
    style='font-size:9.0pt;font-family:宋体;mso-ascii-font-family:Arial;
    mso-hansi-font-family:Arial;mso-bidi-font-family:Arial'>日）和新科学家报（</span><span
    lang=EN-US style='font-size:9.0pt;font-family:Arial'>NEW SCIENTIST</span><span
    style='font-size:9.0pt;font-family:宋体;mso-ascii-font-family:Arial;
    mso-hansi-font-family:Arial;mso-bidi-font-family:Arial'>）（</span><span
    lang=EN-US style='font-size:9.0pt;font-family:Arial'>98</span><span
    style='font-size:9.0pt;font-family:宋体;mso-ascii-font-family:Arial;
    mso-hansi-font-family:Arial;mso-bidi-font-family:Arial'>年</span><span
    lang=EN-US style='font-size:9.0pt;font-family:Arial'>3</span><span
    style='font-size:9.0pt;font-family:宋体;mso-ascii-font-family:Arial;
    mso-hansi-font-family:Arial;mso-bidi-font-family:Arial'>月</span><span
    lang=EN-US style='font-size:9.0pt;font-family:Arial'>7</span><span
    style='font-size:9.0pt;font-family:宋体;mso-ascii-font-family:Arial;
    mso-hansi-font-family:Arial;mso-bidi-font-family:Arial'>日）报道，比利时国际航空公司在</span><span
    lang=EN-US style='font-size:9.0pt;font-family:Arial'>A340</span><span
    style='font-size:9.0pt;font-family:宋体;mso-ascii-font-family:Arial;
    mso-hansi-font-family:Arial;mso-bidi-font-family:Arial'>大型客机新机群上安装了磁性托盘桌，以防止飞行中托盘发出的格格作响声。但这些小桌都有可能使计算机硬盘上的数据丢失。</span><span
    lang=EN-US style='font-size:9.0pt;font-family:Arial'>3</span><span
    style='font-size:9.0pt;font-family:宋体;mso-ascii-font-family:Arial;
    mso-hansi-font-family:Arial;mso-bidi-font-family:Arial'>月</span><span
    lang=EN-US style='font-size:9.0pt;font-family:Arial'>28</span><span
    style='font-size:9.0pt;font-family:宋体;mso-ascii-font-family:Arial;
    mso-hansi-font-family:Arial;mso-bidi-font-family:Arial'>日，新科学家报道这件事情是不真实的。但在法兰克福德开往柏林的列车上，这类小桌已经投入使用了。结论似乎是：如果你打算在任意一种交通工具上使用计算机，那么你应该带着一个（钢！）纸夹，用它来检查桌面是否有磁性。</span><span
    lang=EN-US style='font-size:9.0pt;font-family:Arial'><br>
    <br>
    13</span><span style='font-size:9.0pt;font-family:宋体;mso-ascii-font-family:
    Arial;mso-hansi-font-family:Arial;mso-bidi-font-family:Arial'>、据</span><span
    lang=EN-US style='font-size:9.0pt;font-family:Arial'>IEE 1998</span><span
    style='font-size:9.0pt;font-family:宋体;mso-ascii-font-family:Arial;
    mso-hansi-font-family:Arial;mso-bidi-font-family:Arial'>年</span><span
    lang=EN-US style='font-size:9.0pt;font-family:Arial'>4</span><span
    style='font-size:9.0pt;font-family:宋体;mso-ascii-font-family:Arial;
    mso-hansi-font-family:Arial;mso-bidi-font-family:Arial'>月出版的“控制与计算月刊”第</span><span
    lang=EN-US style='font-size:9.0pt;font-family:Arial'>52</span><span
    style='font-size:9.0pt;font-family:宋体;mso-ascii-font-family:Arial;
    mso-hansi-font-family:Arial;mso-bidi-font-family:Arial'>页，高强度辐射场枪和电磁脉冲变压器炸弹已经能够用一般的标准元件容易地制成。甚至手工制作的高强度辐射场枪或电磁脉冲变压器炸弹在几百米远的地方也可以将微处理器毁坏。也许，在今后几年内，装备了某种电子设备的面包车驶过华尔街后，就可使数以千计的计算机丧失处理信息能力，而这些却不为当地公安部门所知。</span><span
    lang=EN-US style='font-size:9.0pt;font-family:Arial'><br>
    <br>
    14</span><span style='font-size:9.0pt;font-family:宋体;mso-ascii-font-family:
    Arial;mso-hansi-font-family:Arial;mso-bidi-font-family:Arial'>、这里介绍一些医疗事故。在一些医院，由于水管中的地电流产生了磁场，因此这些医院中不能使用高灵敏度的电子仪器。一个病人的导管泵被静电放电损坏，但万幸的是报警系统没有受到影响，护士听到了报警。在一次手术中，一台一塑料焊接机对病人的监控系统产生了干扰，致使没有探测到病人手臂中的血液循环停止，后来这位病人的手臂只得切除掉。</span><span
    style='font-size:9.0pt;font-family:Arial'> <span lang=EN-US><o:p></o:p></span></span></p>
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