|
|
<p><img data-type="gif" src="http://mmbiz.qpic.cn/mmbiz_gif/dx3KibwtDhvc6YBndBzrYvfAVPCGNAlsqB9f7SjRnXkibcO3P2CSjz7TnOO8RAArOGOjobic1D5DCTCzzAoxv9jfw/0?wx_fmt=gif" data-ratio="0.1703125" data-w="640" /></p><p style="margin-top: 1.5em; margin-bottom: 10px; max-width: 100%; min-height: 1em; white-space: normal; text-indent: 2em; font-size: 14px; color: rgb(62, 58, 57); font-family: Arial; box-sizing: border-box !important; word-wrap: break-word !important; background-color: rgb(233, 233, 209);"><span style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;">DR机是在X线电视系统的基础上，利用计算机数字化处理，使模拟视频信号经过采样、模/数转换（analog to digit，A/D）后直接进入计算机中进行存储、分析和保存。放射剂量小，曝光宽容度大，并可根据临床需要进行各种图像后处理等优点，还可实现放射科无胶片化，科室之间、医院之间网络化，便于教学与会诊。本文主要论述DR机的构成和常见故障及维修。<br style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;" />关键词：DR机；故障；维修</span></p><p style="margin-top: 1.5em; margin-bottom: 10px; max-width: 100%; min-height: 1em; white-space: normal; text-indent: 2em; font-size: 14px; color: rgb(62, 58, 57); font-family: Arial; box-sizing: border-box !important; word-wrap: break-word !important; background-color: rgb(233, 233, 209);"><span style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"><br style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;" /> 一、依据探测器的构成材料，DR主要分为三大技术：CCD、一线扫描、非晶体平板（非晶硒、非晶硅+碘化铯/非晶硅+氧化钆）。<br style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;" /> （一）、CCD：由于物理局限性，专家们普遍认为大面积平板采像?CCD?技术不胜任，而且CCD设备在图像质量上较非晶硅/硒平板设备有一定差距，但是相对有价格优势；世界上还有几个厂家用此技术如?Swissray。<br style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;" /> （二）、一线扫描：也称一维线扫描技术，由俄罗斯科学院核物理研究所发明，也就是国内中兴航天在生产的DR；有受照剂量低、设备造价相对平板技术更低廉的优点，但也存在成像时间长（数秒）、空间分辨率低（刚推出时是1mm/lp）以及X线使用效率低的致命缺陷；成像质量较差而且病人会接受大量不必要的辐射。<br style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;" /> （三）、非晶平板：非晶硒/非晶硅；主要由非晶硒层（a-Se）/非晶硅层（a-Si）加薄膜半导体阵列（TFT）构成。<br style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;" /> 二、飞利浦DR机在使用过程中的常见故障及维修方法<br style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;" /> （一）开机后操作台上准备指示灯不亮，并显示故障<br style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;" />代码03HJ，按下曝光手闸，不能进行曝光。查资料故障代码03HJ指实际的球管灯丝电流不在范围内。此机器球管的灯丝工作原理是：高压发生器内的灯丝控制板把交流电压220伏整流成直流电压，并根据CPU板发出的灯丝预热指令，低频直流电压逆变为高频交流电压输送到高压油箱的灯丝变压器初级，经变压器变压后通过高压电缆输送到球管的大小灯丝。在灯丝控制板同时有灯丝反馈电路，实时监测灯丝加热情况。<br style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;" /> 故障排除：在高压油箱的灯丝变压器初级没有测到电压，故可能故障在高压油箱之前，灯丝控制板上测得有220伏交流电压输入，并测到有直流电压＋5V，＋26V，＋15V，－15V。故可能是灯丝控制板故障。拔出灯丝控制板测得板上的MOS场效应管V22，V23击穿断路，此管型号是IXFH15N60，于市场上购买此管安装之后，机器可以正常使用。<br style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;" /> （二）机器开机后在主机工作站的监视器右下角显<br style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;" />示：Walldetectornotconnected（胸片架探测器未连接上），按下曝光手闸，不能进行曝光，开关机器多次故障还是依旧。<br style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;" />故障判断：经分析是探测器与主机工作站通讯没有建立上。原因是：<br style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;" /> A：探测器本身故障。<br style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;" /> B：探测器接口板故障。<br style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;" /> C：探测器与主机工作站之间的通讯线断路。D：主机工作站接口板故障。<br style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;" /> 故障排除：我们首先查看探测器的自检和指示灯都是正常，故探测器应该是正常。</span></p><p style="max-width: 100%; min-height: 1em; color: rgb(62, 62, 62); font-family: 'Hiragino Sans GB', 'Microsoft YaHei', Arial, sans-serif; font-size: 16px; line-height: 25.6px; white-space: normal; box-sizing: border-box !important; word-wrap: break-word !important; background-color: rgb(255, 255, 255);"><br style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;" /></p><p style="max-width: 100%; min-height: 1em; color: rgb(62, 62, 62); font-family: 'Hiragino Sans GB', 'Microsoft YaHei', Arial, sans-serif; font-size: 16px; line-height: 25.6px; white-space: normal; box-sizing: border-box !important; word-wrap: break-word !important; background-color: rgb(255, 255, 255);"><span style="max-width: 100%; color: rgb(62, 58, 57); font-family: Arial; font-size: 14px; box-sizing: border-box !important; word-wrap: break-word !important;">探测器与主机工作站之间的通讯线有两条：一条是用于传输图像数据的光纤，把光纤两端都拆掉，一端用手电照着。另一条是用于探测器与主机工作站之间的通讯用RS232数据线，用万用表测量到RS232数据线是好的，但是发现数据线在主机工作站端的针脚有些氧化，用酒精处理后，重新开机，探测器和工作站通讯正常，机器可以正常使用。<br style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;" /> （三）机器开机正常，但在按下曝光手闸后，机器过载指示灯亮，显示故障代码是02HG，查代码02HG，指实际的千伏值超出范围。<br style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;" /> 球管高压的工作原理是：千伏控制板接收到CPU控制板的处理指令信号后，把控制信号输到逆变器（由于高压发生器最大功率是65千瓦，故有两个逆变器），逆变器在此信号控制下把三相交流380伏整流为直流560伏，并把它逆变为高频信号输到高压油箱的高压变压器初级，高压变压器次级电压经整流成高压通过高压电缆输到球管。<br style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;" /> 故障判断：根据其工作原理分析故障原因为以下几点：<br style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;" /> A：CPU控制板故障。B：千伏控制板故障。C：逆变器故障。<br style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;" /> D：高压油箱及高压电缆故障。E：球管故障。<br style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;" /> 故障排除：为观察曝光的实际情况，在曝光时用示波器测量实际千伏值，测量到阴极0千伏，阳极是0．39千伏，阳极实际千伏值高于阴极。可能是阴极故障引起曝光未完成，把两个逆变器互换，如果是逆变器故障，互换逆变器应该会是阳极实际千伏值低于阴极。但曝光用示波器测量到阳极实际千伏值仍高于阴极，故推断两个逆变器应该都是好的。互换阴极和阳极高压电缆，曝光用示波器测量到阳极实际千伏值还是高于阴极，故阴极和阳极高压电缆也都是好的。<br style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;" /> 三、KODAK DirectView DR 3000常见故障及维修<br style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;" /> （一）系统正常使用状态下，主机突然自动关机<br style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;" /> 故障原因分析：如果电压波动过大，PDU检测到AC输入异常，主机就会收到UPS发出的错误代码，系统就会自动关机。检查控制台前面板上的状态指示灯不亮，紧急关机按钮也呈开启状态，此时考虑PDU供电故障，检查UPS发现低压补偿指示灯在闪烁，提示供电电压过低，所以安装稳压设备即可避免和排除这种故障。<br style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;" /> （二）高压发生器初始化错误，或启动时报错：DRComagent启动失败，请关机重启，无法曝光。<br style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;" /> 故障原因：检查高压发生器控制主板DS1灯常亮，DS2灯闪烁，状态正常，检测DC+5V、DC+12V电压正常，高压油箱上电正常，判断高压发生器正常，应该是通信故障。<br style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;" /> 故障排除：清理高压发生器、控制柜、主机通讯接口，测试通信正常，开机仍然报错。拆开主机机箱，检查发现主板有部分电容鼓包，为防止电容爆浆引起更大故障，立即更换了同型号电容，重新插拔通信板，试机仍报同样故障，怀疑通信电路板或PCI插槽故障，更换PCI插槽试机正常。<br style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;" /> 小结<br style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;" /> DR机在维修前应分析故障的原因，以及可能的故障部分，采取合适的维修方法，由易而难，分段判断等方法，才能达到事半功倍的效果。</span></p><p><br /></p><p style="max-width: 100%; min-height: 1em; color: rgb(62, 62, 62); font-size: 16px; white-space: normal; line-height: 25.6px; box-sizing: border-box !important; word-wrap: break-word !important; background-color: rgb(255, 255, 255);"><span style="max-width: 100%; font-size: 14px; text-indent: 0em; font-family: Arial, Verdana, sans-serif; line-height: 1.75em; box-sizing: border-box !important; word-wrap: break-word !important;">地址：广州市天河区银利街银利茶叶博览中心E栋4楼E4030室 </span><span style="max-width: 100%; font-size: 14px; text-indent: 0em; font-family: Arial, Verdana, sans-serif; line-height: 1.75em; box-sizing: border-box !important; word-wrap: break-word !important;"> </span></p><p style="max-width: 100%; min-height: 1em; color: rgb(62, 62, 62); font-size: 12px; text-indent: 0em; white-space: normal; font-family: Arial, Verdana, sans-serif; line-height: 1.75em; box-sizing: border-box !important; word-wrap: break-word !important; background-color: rgb(255, 255, 255);"><span style="max-width: 100%; font-size: 14px; line-height: 1.75em; box-sizing: border-box !important; word-wrap: break-word !important;">邮编：510507</span></p><p style="max-width: 100%; min-height: 1em; color: rgb(62, 62, 62); font-size: 12px; text-indent: 0em; white-space: normal; font-family: Arial, Verdana, sans-serif; line-height: 1.75em; box-sizing: border-box !important; word-wrap: break-word !important; background-color: rgb(255, 255, 255);"><span style="max-width: 100%; font-size: 14px; box-sizing: border-box !important; word-wrap: break-word !important;">电话：(+86)020-8722 8723 8764 5360 8764 2943 </span></p><p style="max-width: 100%; min-height: 1em; color: rgb(62, 62, 62); font-size: 12px; text-indent: 0em; white-space: normal; font-family: Arial, Verdana, sans-serif; line-height: 1.75em; box-sizing: border-box !important; word-wrap: break-word !important; background-color: rgb(255, 255, 255);"><span style="max-width: 100%; font-size: 14px; box-sizing: border-box !important; word-wrap: break-word !important;">传真：020-8722 8623</span></p><p style="max-width: 100%; min-height: 1em; color: rgb(62, 62, 62); font-size: 12px; text-indent: 0em; white-space: normal; font-family: Arial, Verdana, sans-serif; line-height: 1.75em; box-sizing: border-box !important; word-wrap: break-word !important; background-color: rgb(255, 255, 255);"><span style="max-width: 100%; font-size: 14px; box-sizing: border-box !important; word-wrap: break-word !important;">全国统一免费服务热线：400-020-6788</span></p><p style="max-width: 100%; min-height: 1em; color: rgb(62, 62, 62); font-size: 12px; text-indent: 0em; white-space: normal; font-family: Arial, Verdana, sans-serif; line-height: 1.75em; box-sizing: border-box !important; word-wrap: break-word !important; background-color: rgb(255, 255, 255);"><span style="max-width: 100%; font-size: 16px; line-height: 24.381px; font-family: 'Helvetica Neue', Helvetica, 'Hiragino Sans GB', 'Microsoft YaHei', Arial, sans-serif; box-sizing: border-box !important; word-wrap: break-word !important;">公司官网：http://gb.parts-ultrasound.com/</span><span style="max-width: 100%; font-size: 14px; box-sizing: border-box !important; word-wrap: break-word !important;"></span></p><p style="max-width: 100%; min-height: 1em; color: rgb(62, 62, 62); font-size: 16px; white-space: normal; line-height: 24.381px; box-sizing: border-box !important; word-wrap: break-word !important; background-color: rgb(255, 255, 255);"><span style="max-width: 100%; line-height: 1.75em; text-indent: 0em; font-size: 14px; font-family: Arial, Verdana, sans-serif; box-sizing: border-box !important; word-wrap: break-word !important;">微信公众帐号：</span></p><p><img data-s="300,640" data-type="jpeg" src="http://mmbiz.qpic.cn/mmbiz_jpg/dx3KibwtDhvfh2wVX4NftfnfjcZWIKK6EQDWtTTsYwjfQBnsqkThAZP5OlDmg5S3g22gSqMWhAxr2O4MydSJHnQ/0?wx_fmt=jpeg" data-ratio="1" data-w="258" /></p><p style="max-width: 100%; min-height: 1em; color: rgb(62, 62, 62); font-size: 12px; text-indent: 0em; white-space: normal; font-family: Arial, Verdana, sans-serif; line-height: 1.75em; box-sizing: border-box !important; word-wrap: break-word !important; background-color: rgb(255, 255, 255);"><span style="max-width: 100%; font-size: 14px; box-sizing: border-box !important; word-wrap: break-word !important;">维修咨询：QQ: 712638 404</span><br style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;" /></p><p style="max-width: 100%; min-height: 1em; color: rgb(62, 62, 62); font-size: 12px; text-indent: 0em; white-space: normal; font-family: Arial, Verdana, sans-serif; line-height: 1.75em; box-sizing: border-box !important; word-wrap: break-word !important; background-color: rgb(255, 255, 255);"><span style="max-width: 100%; font-size: 14px; box-sizing: border-box !important; word-wrap: break-word !important;">设备咨询: QQ: 712638 405</span></p><p style="max-width: 100%; min-height: 1em; color: rgb(62, 62, 62); font-size: 16px; white-space: normal; line-height: 24.381px; text-align: justify; box-sizing: border-box !important; word-wrap: break-word !important; background-color: rgb(255, 255, 255);"><span style="max-width: 100%; font-size: 14px; font-family: Arial, Verdana, sans-serif; line-height: 1.75em; text-indent: 0em; box-sizing: border-box !important; word-wrap: break-word !important;">软件咨询：QQ: 712638 406</span><br style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;" /></p><p style="max-width: 100%; min-height: 1em; color: rgb(62, 62, 62); font-size: 12px; text-indent: 0em; white-space: normal; font-family: Arial, Verdana, sans-serif; line-height: 1.75em; box-sizing: border-box !important; word-wrap: break-word !important; background-color: rgb(255, 255, 255);"><span style="max-width: 100%; font-size: 14px; box-sizing: border-box !important; word-wrap: break-word !important;">配件咨询：QQ: 712638 407</span></p><p style="max-width: 100%; min-height: 1em; color: rgb(62, 62, 62); font-size: 12px; text-indent: 0em; white-space: normal; font-family: Arial, Verdana, sans-serif; line-height: 1.75em; box-sizing: border-box !important; word-wrap: break-word !important; background-color: rgb(255, 255, 255);"><span style="max-width: 100%; font-size: 14px; box-sizing: border-box !important; word-wrap: break-word !important;">交流Q群：1106 11074</span></p><p style="max-width: 100%; min-height: 1em; color: rgb(62, 62, 62); font-size: 12px; text-indent: 0em; white-space: normal; font-family: Arial, Verdana, sans-serif; line-height: 1.75em; box-sizing: border-box !important; word-wrap: break-word !important; background-color: rgb(255, 255, 255);"><span style="max-width: 100%; font-size: 14px; box-sizing: border-box !important; word-wrap: break-word !important;">网址：https://renchengyiliao.1688.com</span></p><p style="max-width: 100%; min-height: 1em; color: rgb(62, 62, 62); font-size: 12px; text-indent: 0em; white-space: normal; font-family: Arial, Verdana, sans-serif; line-height: 1.75em; box-sizing: border-box !important; word-wrap: break-word !important; background-color: rgb(255, 255, 255);"><span style="max-width: 100%; font-size: 14px; box-sizing: border-box !important; word-wrap: break-word !important;">电子邮箱：service@yiliaoshebeiweixiu.com</span></p><p><span style="max-width: 100%; font-size: 14px; box-sizing: border-box !important; word-wrap: break-word !important;"><br /></span></p><p><br /></p>
|
|
发表于 2020-10-19 23:17:31