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<p style=""><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important;"><img src="http://mmbiz.qpic.cn/mmbiz/A1DicCH9Vl6NQ9ECz4f1F1lices3wegzxwxIa1WRuQfsXMGoUwO0yoSlfbpEHbZQicJduJw5ibDZjte5Picd45XzicUQ/0" data-ratio="0.2531328320802005" data-w="399" /></span></p><p style=""><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important;">西门子<span style="">spirit CT</span><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important; font-family: 宋体;">机有比较大的用户量，其维修虽不复杂，但有些故障现象比较难以解决。故障现象：机器能够进入</span></span></p><p style=""><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important;"> </span></p><p style=""><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important;">standby<span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important; font-family: 宋体;">状态。但在模式装载完毕，按下启动键开始曝光时，扫描仅持续很短的时间便立即中断。这个故障现象给人的</span></span></p><p style=""><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important;"> </span></p><p style=""><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important;">初步感觉似乎是高压问题。于是打开<span style="">eventlog</span><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important; font-family: 宋体;">文件检查错误纪录，发现错误代码为</span><span style="">CT_MAS_31</span><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important; font-family: 宋体;">和</span><span style="">CT_ITE_1177</span><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important; font-family: 宋体;">，相应的确</span></span></p><p style=""><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important;"> </span></p><p style=""><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important;">错误信息为<span style="">:too many corrupt readings during data collection</span><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important; font-family: 宋体;">，解决方案为：</span><span style="">(1)check optic cable;(2)replace</span></span></p><p style=""><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important;"> </span></p><p style=""><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important;">IRS<span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important; font-family: 宋体;">。这显然是数据采集和接收电路发生了故障</span><span style="">——</span><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important; font-family: 宋体;">计算机发现采集的图像数据异常而终止了扫描。为了确认与高压发</span></span></p><p style=""><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important;"> </span></p><p style=""><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important;">生器无关，做关闭<span style="">X</span><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important; font-family: 宋体;">射线的数据采集测试，方法如下：进入</span><span style="">local service’test tools’rot mode’go’add windows</span></span></p><p style=""><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important;"> </span></p><p style=""><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important;">’control→<span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important; font-family: 宋体;">将</span><span style="">x ray</span><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important; font-family: 宋体;">，</span><span style="">anodes</span><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important; font-family: 宋体;">设置为</span><span style="">off→</span><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important; font-family: 宋体;">按下启动键扫描。扫描仍然不能正常进行。错误代码依然为</span><span style="">CT_MAS_31</span><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important; font-family: 宋体;">，</span></span></p><p style=""><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important;"> </span></p><p style=""><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important;">CT_MAS_1177<span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important; font-family: 宋体;">。这样，高压问题就被排除了，故障确实发生在数据采集和传输通路上。接下来采取以下步骤逐一测试，</span></span></p><p style=""><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important;"> </span></p><p style=""><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important;">排除。</span></p><p style=""><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important;"> </span></p><p style=""><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important;"> <span style="">1 </span><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important; font-family: 宋体;">检查</span><span style="">IRS</span></span></p><p style=""><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important;"> </span></p><p style=""><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important;"> 如果<span style="">IRS</span><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important; font-family: 宋体;">的</span><span style="">D20</span><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important; font-family: 宋体;">板或硬盘出现问题也会误报，产生类似的错误。于是做</span><span style="">DMS</span><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important; font-family: 宋体;">测试，方法如下：进入</span><span style="">local service→</span></span></p><p style=""><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important;"> </span></p><p style=""><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important;">test tools→DMS→<span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important; font-family: 宋体;">选择</span><span style="">gantry rotation on.→source</span><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important; font-family: 宋体;">设置为</span><span style="">receiver→go→</span><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important; font-family: 宋体;">按下启动键扫描。测试顺利通过。这表明</span></span></p><p style=""><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important;"> </span></p><p style=""><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important;">IRS<span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important; font-family: 宋体;">的数据接收功能正常，</span><span style="">D20</span><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important; font-family: 宋体;">板没有问题。进而为确认原始数据也能在</span><span style="">IRS</span><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important; font-family: 宋体;">内顺利保存，对硬盘做了</span><span style="">3</span><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important; font-family: 宋体;">次重复检测，方法</span></span></p><p style=""><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important;"> </span></p><p style=""><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important;">如下：进<span style="">local service→test tools→ICS/IRS→IRS disc test→go</span><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important; font-family: 宋体;">，结果显示硬盘正常。这样，</span><span style="">IRS</span><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important; font-family: 宋体;">被排除了。</span></span></p><p style=""><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important;"> </span></p><p style=""><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important;"> <span style="">2 </span><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important; font-family: 宋体;">检查从扫描架到</span><span style="">IRS</span><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important; font-family: 宋体;">的光缆</span></span></p><p style=""><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important;"> </span></p><p style=""><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important;"> 探测器采集的数据经过处理后通过该光缆传送至<span style="">IRS</span><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important; font-family: 宋体;">进行图像重建。因此，这根光缆断裂或漏光会直接导致图像数</span></span></p><p style=""><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important;"> </span></p><p style=""><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important;">据格式错误从而发生扫描中断。拔下<span style="">IRS</span><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important; font-family: 宋体;">上的光缆头，看见顶部有明显红光。另外检查整根光缆，发现完好无损，光缆</span></span></p><p style=""><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important;"> </span></p><p style=""><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important;">正常。</span></p><p style=""><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important;"> </span></p><p style=""><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important;"> <span style="">3 </span><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important; font-family: 宋体;">扫描架部分的检查</span></span></p><p style=""><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important;"> </span></p><p style=""><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important;"> 扫描架的数据处理和传输部分有以下几个部分组成：<span style="">(1)DMS CONTROLLER</span><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important; font-family: 宋体;">板</span><span style="">;(2)DOM</span><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important; font-family: 宋体;">板</span><span style="">;(3)TRANSMITTER/RECEIVER</span><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important; font-family: 宋体;">板</span></span></p><p style=""><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important;"> </span></p><p style=""><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important;">(TRANSMITTER<span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important; font-family: 宋体;">板在滑环上，</span><span style="">RECEIVER</span><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important; font-family: 宋体;">板在天线接收板上</span><span style="">);(4)</span><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important; font-family: 宋体;">滑环上的天线</span><span style="">;(5)</span><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important; font-family: 宋体;">天线接收板。以上任一环节发生故障都</span></span></p><p style=""><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important;"> </span></p><p style=""><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important;">会影响正常数据的产生和传输<span style="">;(6)</span><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important; font-family: 宋体;">此外滑环天线与天线接收板的距离不当也同样可以导致类似错误的发生。</span></span></p><p style=""><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important;"> </span></p><p style=""><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important;"> 首先旁路<span style="">DOM</span><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important; font-family: 宋体;">板。将</span><span style="">DOM</span><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important; font-family: 宋体;">板跳去后扫描，结果没有变化，判断</span><span style="">DOM</span><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important; font-family: 宋体;">板正常。其次调整滑环天线与接收板的距离</span><span style="">.</span><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important; font-family: 宋体;">将滑环</span></span></p><p style=""><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important;"> </span></p><p style=""><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important;">天线与天线接收板的距离分别调整至<span style="">0.6 mm</span><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important; font-family: 宋体;">、</span><span style="">0.8 mm</span><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important; font-family: 宋体;">、</span><span style="">1.0 mm</span><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important; font-family: 宋体;">、</span><span style="">1.2 mm</span><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important; font-family: 宋体;">和</span><span style="">1.4 mm</span><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important; font-family: 宋体;">。后进行扫描，中断报错仍然发生，于</span></span></p><p style=""><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important;"> </span></p><p style=""><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important;">是<span style="">F</span><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important; font-family: 宋体;">项的可能性也被排除了。</span></span></p><p style=""><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important;"> </span></p><p style=""><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important;"> 接着检测<span style="">DMS CONTROLLER</span><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important; font-family: 宋体;">，天线接收板和</span><span style="">TRANSMITTER/RECEIVER</span><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important; font-family: 宋体;">这三块电路板。由于没有相应的软件直接测试这三</span></span></p><p style=""><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important;"> </span></p><p style=""><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important;">块板，所以只能间接发现它们的好坏，方法如下：进入<span style="">local service→test tools→static mode→go→</span><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important; font-family: 宋体;">按启动键扫描</span></span></p><p style=""><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important;"> </span></p><p style=""><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important;">。扫描结果是这样的：当球管在<span style="">160 ℃~270 ℃</span><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important; font-family: 宋体;">时扫描中断报错，球管在其他角度扫描则正常。也就是说错误的数据只</span></span></p><p style=""><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important;"> </span></p><p style=""><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important;">在固定的角度产生。由此可以判断<span style="">DMS CONTROLLER</span><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important; font-family: 宋体;">板正常。再结合滑环天线的结论可以推断</span><span style="">TRANSMITTER/RECEIVER</span><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important; font-family: 宋体;">板和</span></span></p><p style=""><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important;"> </span></p><p style=""><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important;">天线接收板也没有问题。</span></p><p style=""><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important;"> </span></p><p style=""><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important;"> 现在看来应当是滑环天线出现了问题，需要更换整个滑环<span style="">(</span><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important; font-family: 宋体;">天线镶嵌在滑环上，没法单独更换</span><span style="">)</span><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important; font-family: 宋体;">。但滑环是个大部件</span></span></p><p style=""><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important;"> </span></p><p style=""><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important;">，价值也很昂贵，更换前需要得到进一步确认<span style="">:</span><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important; font-family: 宋体;">将</span><span style="">DOM</span><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important; font-family: 宋体;">板输出光缆拔下后直接插到天线接收板上的</span><span style="">RECEIVER</span><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important; font-family: 宋体;">板的输入口，</span></span></p><p style=""><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important;"> </span></p><p style=""><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important;">再次进入<span style="">local service→test tools→static mode→go.→</span><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important; font-family: 宋体;">按启动键扫描，扫描能够顺利完成，从而证实滑环天线确</span></span></p><p style=""><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important;"> </span></p><p style=""><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important;">实坏了。滑环天线是由镶嵌在滑环上的一圈金属薄层和<span style="">4</span><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important; font-family: 宋体;">个精密电阻组成。仔细检查金属薄层，没有发现明显破损痕迹</span></span></p><p style=""><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important;"> </span></p><p style=""><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important;">，会不会是电阻出了问题呢<span style=""></span><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important; font-family: 宋体;">用万用表测量这</span><span style="">4</span><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important; font-family: 宋体;">个精密电阻，结果发现其中一个阻值为</span><span style="">16 Ω</span><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important; font-family: 宋体;">，其他</span><span style="">3</span><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important; font-family: 宋体;">个均为</span><span style="">9 Ω</span><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important; font-family: 宋体;">左右。</span><span style="">4</span></span></p><p style=""><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important;"> </span></p><p style=""><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important;">个电阻型号完全一样，阻值也应该相同，于是将阻值<span style="">16 Ω</span><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important; font-family: 宋体;">的电阻，更换为</span><span style="">9 Ω</span><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important; font-family: 宋体;">的电阻并给机器加电进行正常扫描，完</span></span></p><p style=""><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important;"> </span></p><p style=""><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important;">整的曝光时间出现后，扫描正常，图像也出来了，机器终于正常工作了</span></p><p><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important;"><br /></span></p><p><img data-s="300,640" src="http://mmbiz.qpic.cn/mmbiz/A1DicCH9Vl6NQ9ECz4f1F1lices3wegzxwMJBXT2J7BDYqSC5VVOYBR9hhgVLxkKTG8z8EjvIzH0nGepb0oQCTDA/0" data-ratio="0.8414634146341463" data-w="492" /></p><p class="p0" style="margin-top: 0pt; 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发表于 2020-10-21 14:02:31