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<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><br /></p><p><br /></p><p><br /></p><section data-role="outer" label="Powered by gulangu" style="max-width: 100%; font-family: 微软雅黑; font-size: 16px; box-sizing: border-box !important; word-wrap: break-word !important;"><section class="" data-tools="gulangu" data-id="86362" style="max-width: 100%; box-sizing: border-box; border: 0px none; word-wrap: break-word !important;"><section style="margin-left: 5px; padding: 15px 10px; max-width: 100%; box-sizing: border-box; border: 2px solid rgb(62, 62, 64); border-radius: 4px; word-wrap: break-word !important;"><section style="margin-top: -4px; margin-right: 8px; margin-left: -0.6em; max-width: 100%; box-sizing: border-box; color: rgb(75, 92, 196); float: left; font-size: 2.7em; line-height: 1em; word-wrap: break-word !important;"><img border="0" class="" data-ratio="0.85" src="http://mmbiz.qpic.cn/mmbiz/yqVAqoZvDibFdT5SgkkibedjPqHmHgugvSxtfUyDOHokCDnElBoD6G2JUR2KCZaZVuaspo08Kj6adYBSkmDRQQww/0?" data-w="60" height="auto" opacity="" style="box-sizing: border-box !important; word-wrap: break-word !important; width: 60px !important; visibility: visible !important;" title="" width="60" /></section><section class="" data-style="clear:none;font-size:14px;" style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"><p style="max-width: 100%; min-height: 1em; line-height: 2em; text-align: center; box-sizing: border-box !important; word-wrap: break-word !important;"> <span style="max-width: 100%; font-size: 14px; box-sizing: border-box !important; word-wrap: break-word !important;"> <span style="max-width: 100%; font-size: 18px; box-sizing: border-box !important; word-wrap: break-word !important;"><strong style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;">B超的维修技巧和维修思路推荐</strong></span></span></p><p style="max-width: 100%; min-height: 1em; line-height: 2em; box-sizing: border-box !important; word-wrap: break-word !important;"><span style="max-width: 100%; font-size: 14px; box-sizing: border-box !important; word-wrap: break-word !important;"> 目前,在各级医院中,B型超声诊断仪基本已属常规设备,由于其操作方便,诊断范围广,因此使用率很高,已经成为医生辅助诊断不可或缺的设备,由于其高使用率,因此故障多有发生。一旦发生故障,既影响医生诊断,又影响医院创收,所以,作为医院的维修技术人员,掌握B型超声诊断仪的维修技术,及时排除故障,是十分必要的。以下是笔者根据多年的学习和工作经验,对B超仪维修的一些体会。</span></p><p style="max-width: 100%; min-height: 1em; line-height: 2em; box-sizing: border-box !important; word-wrap: break-word !important;"><strong style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"><span style="max-width: 100%; font-size: 14px; box-sizing: border-box !important; word-wrap: break-word !important;">1 了解B超仪的基本工作原理和相关电路 </span></strong></p><p style="max-width: 100%; min-height: 1em; line-height: 2em; box-sizing: border-box !important; word-wrap: break-word !important;"><span style="max-width: 100%; font-size: 14px; box-sizing: border-box !important; word-wrap: break-word !important;"> 掌握操作技能,灵活运用维修手册和相关技术资料,以利于提高检修效率。一旦发生故障,应通过操作人员了解仪器故障出现前和出现故障时的现象,如:显示是否正常、有无异常声音及异常气味;故障是突然发生还是逐渐变化;是时有时无还是一直如此;仪器的使用年限及使用环境;检修历史等。然后开机操作运行试验,观察故障形成过程及其表现。掌握基本情况常用的方法有看、闻、问、查。</span></p><p style="max-width: 100%; min-height: 1em; line-height: 2em; box-sizing: border-box !important; word-wrap: break-word !important;"><span style="max-width: 100%; font-size: 14px; box-sizing: border-box !important; word-wrap: break-word !important;">看:用眼观察电路板有关元器件有无烧焦、变色、破裂、流液、虚焊、脱焊、短路、松脱等。通电后再观察有无打火及冒烟现象。</span></p><p style="max-width: 100%; min-height: 1em; line-height: 2em; box-sizing: border-box !important; word-wrap: break-word !important;"><span style="max-width: 100%; font-size: 14px; box-sizing: border-box !important; word-wrap: break-word !important;">闻:打开机盖,通电前后是否闻到异常气味,若有应立即关机检查。</span></p><p style="max-width: 100%; min-height: 1em; line-height: 2em; box-sizing: border-box !important; word-wrap: break-word !important;"><span style="max-width: 100%; font-size: 14px; box-sizing: border-box !important; word-wrap: break-word !important;">问:询问操作人员故障发生前后有哪些异常现象;该机是否检修过;是新故障还是老故障重现;使用条件是否有变化,如电压是否波动太大、周围是否存在干扰;出现故障前该机是否碰撞过等。</span></p><p style="max-width: 100%; min-height: 1em; line-height: 2em; box-sizing: border-box !important; word-wrap: break-word !important;"><span style="max-width: 100%; font-size: 14px; box-sizing: border-box !important; word-wrap: break-word !important;">查:进行初步检查,如电源接插件是否完好,有无断线,保险丝是否熔断,开机后是否有指示,操作各调节旋钮或按键是否有反映等。掌握上述基本情况后,参考该机的相关技术资料,分析判断故障产生的原因及大概部位,结合日常积极的检修资料和经验,制定可行的检修方案。按氦定检修方案,对相关电路进行有关观察和测试,缩小故障范围,并不断修正拟定方案,以确定故障的具体位置。</span></p><p style="max-width: 100%; min-height: 1em; line-height: 2em; box-sizing: border-box !important; word-wrap: break-word !important;"><strong style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"><span style="max-width: 100%; font-size: 14px; box-sizing: border-box !important; word-wrap: break-word !important;">2 判断故障所在位置的基本方法 </span></strong></p><p style="max-width: 100%; min-height: 1em; line-height: 2em; box-sizing: border-box !important; word-wrap: break-word !important;"><span style="max-width: 100%; font-size: 14px; box-sizing: border-box !important; word-wrap: break-word !important;"> B型超声诊断仪一般由整机电源电路、发射脉冲产生与控制电路、超声信号接收与处理电路、数字扫描变换电器、数字图像处理电路、超声探头部分及监视器电路等组成,具体分布在探头(换能器)、主机和监视器三大部分中。判断故障所在位置的基本方法有:</span></p><p style="max-width: 100%; min-height: 1em; line-height: 2em; box-sizing: border-box !important; word-wrap: break-word !important;"><span style="max-width: 100%; font-size: 14px; box-sizing: border-box !important; word-wrap: break-word !important;">2-1 用同规格、型号新的探头或正常工作的探头更换故障机的探头,若故障现象消失,则说明原探头有故障;若故障现象不变,则说明原探头无问题。</span></p><p style="max-width: 100%; min-height: 1em; line-height: 2em; box-sizing: border-box !important; word-wrap: break-word !important;"><span style="max-width: 100%; font-size: 14px; box-sizing: border-box !important; word-wrap: break-word !important;">2-2 将故障机主机的视频信号输入到同型号正常工作的B超仪监视器输入端,若故障现象消失,说明故障机的监视器有故障。</span></p><p style="max-width: 100%; min-height: 1em; line-height: 2em; box-sizing: border-box !important; word-wrap: break-word !important;"><span style="max-width: 100%; font-size: 14px; box-sizing: border-box !important; word-wrap: break-word !important;">2-3 当将探头和监视器的故障情况确定后,就能够判断主机是否有故障。主机故障部位判断:主机一般由接收发射部分、模拟信号处理部分、数字信号转换部分及电源部分组成。首先检查电源部分是否工作正常,然后用示波器分别观测接收发射部分及信号处理部分各输入、输出信号波形,确定数字信号转换部分是否有故障。</span></p><p style="max-width: 100%; min-height: 1em; line-height: 2em; box-sizing: border-box !important; word-wrap: break-word !important;"><span style="max-width: 100%; font-size: 14px; box-sizing: border-box !important; word-wrap: break-word !important;">2-4 数字信号转换部分故障部位确定:数字信号转换部分由信号通道、控制部分及字符框标三部分组成。也应用示波器按各部分检查,缩小故障范围,确定所在的具体部位。</span></p><p style="max-width: 100%; min-height: 1em; line-height: 2em; box-sizing: border-box !important; word-wrap: break-word !important;"><strong style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"><span style="max-width: 100%; font-size: 14px; box-sizing: border-box !important; word-wrap: break-word !important;">3 检查故障的基本原则</span></strong></p><p style="max-width: 100%; min-height: 1em; line-height: 2em; box-sizing: border-box !important; word-wrap: break-word !important;"><span style="max-width: 100%; font-size: 14px; box-sizing: border-box !important; word-wrap: break-word !important;">3-1 先外后内:有些故障是人为造成的,不是机器本身有故障,所以应先检查操作者是否按正常操作程序进行的再检查各开关和旋钮位置是否正确或适当。有些故障通过面板上的旋钮或控制键便能判断故障的大致位置。</span></p><p style="max-width: 100%; min-height: 1em; line-height: 2em; box-sizing: border-box !important; word-wrap: break-word !important;"><span style="max-width: 100%; font-size: 14px; box-sizing: border-box !important; word-wrap: break-word !important;">3-2 先电源后负载:打开机盖,接通电源后,首先测量电源各组输出电压是否正常,只有电源输出电压正常,才能再考虑其他问题。相当数量的故障都是由于电源电压不正常造成的。例如,CS-400B型超声诊断仪,故障现象为行频不同步,调节外部行频电位器检查判断机内有故障,打开机盖测量电原各组输出电压时,发现电原+5V电压不正常,更换+5V电源滤波电容器,再开机操作试验,故障现象消失。由此说明先检查电源电路后检查负载电路能提高检修效率。</span></p><p style="max-width: 100%; min-height: 1em; line-height: 2em; box-sizing: border-box !important; word-wrap: break-word !important;"><span style="max-width: 100%; font-size: 14px; box-sizing: border-box !important; word-wrap: break-word !important;">3-3 先电路板后单元电路:B超仪一般是几个功能单元电路装在一块电路板上,由几块电路板构成整机电路,一般采用拔插法和代换法确定故障所在电路板。①拔插不进通过拔下或插回某一电路板插件来判断故障在哪一块电路板的方法,用该方法检查电源过载故障特别有效。②代换法仍是采用同型号B超仪的相同且工作的电路板,代换故障机上怀疑有故障的电路板,代换后若故障排除,则说明该机原电路板确实有故障。这样可大大减轻检修劳动强度,节约检修时间。</span></p><p style="max-width: 100%; min-height: 1em; line-height: 2em; box-sizing: border-box !important; word-wrap: break-word !important;"><span style="max-width: 100%; font-size: 14px; box-sizing: border-box !important; word-wrap: break-word !important;">3-4 单元电路检修方法:根据电路板的检测,确定故障所在单元电路后,采用下述方法确定变质或损坏的元器件。</span></p><p style="max-width: 100%; min-height: 1em; line-height: 2em; box-sizing: border-box !important; word-wrap: break-word !important;"><span style="max-width: 100%; font-size: 14px; box-sizing: border-box !important; word-wrap: break-word !important;">3-4-1 电流测定量:测量有关测试点电压的高低,判断单元电路工作状态,确定变质、损坏的元器件。这种方法最为方便,应用最广。</span></p><p style="max-width: 100%; min-height: 1em; line-height: 2em; box-sizing: border-box !important; word-wrap: break-word !important;"><span style="max-width: 100%; font-size: 14px; box-sizing: border-box !important; word-wrap: break-word !important;">3-4-2 电阻测量法:根据测量有关节点的对地电阻,分析判断单元电路的故障范围,找出变质、损坏的元器件。</span></p><p style="max-width: 100%; min-height: 1em; line-height: 2em; box-sizing: border-box !important; word-wrap: break-word !important;"><span style="max-width: 100%; font-size: 14px; box-sizing: border-box !important; word-wrap: break-word !important;">3-4-3 波形观测法:用示波器测量有关测试点的信号波形,判断单元电路的工作状态,分析找出变质、损坏的元器件。</span></p><p style="max-width: 100%; min-height: 1em; line-height: 2em; box-sizing: border-box !important; word-wrap: break-word !important;"><span style="max-width: 100%; font-size: 14px; box-sizing: border-box !important; word-wrap: break-word !important;">3-4-4 代换法:怀疑某个元器件有问题时,试用同规格的正常元器件代换,以确定变质、损坏的元器件。</span></p><p style="max-width: 100%; min-height: 1em; line-height: 2em; box-sizing: border-box !important; word-wrap: break-word !important;"><span style="max-width: 100%; font-size: 14px; box-sizing: border-box !important; word-wrap: break-word !important;">根据单元电路检测结果,判断具体变质或损坏元器件后,用同规格性能良好的元器件更换,若损坏的可调元件,则更换后还应进行适当的调整,以保证单元电路工作正常。更换无件时,要保证印刷电路不受损伤,也不能造成新的故障。</span></p><p style="max-width: 100%; min-height: 1em; line-height: 2em; box-sizing: border-box !important; word-wrap: break-word !important;"><span style="max-width: 100%; font-size: 14px; box-sizing: border-box !important; word-wrap: break-word !important;">更换变质损坏的元件后,装好单元电路所在电路板,恢复整机原来状态,然后按照该机的有关技术指标进行调试和试验,把B超仪调整到罗佳的工作状态,方可进行实际操作使用。</span></p><p style="max-width: 100%; min-height: 1em; 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;" /></p></section></section></section><p style="max-width: 100%; min-height: 1em; box-sizing: border-box !important; word-wrap: break-word !important;"><br /></p></section><p style="max-width: 100%; min-height: 1em; font-size: 16px; 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; 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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; font-size: 16px; 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 style="max-width: 100%; min-height: 1em; font-size: 17.1429px; line-height: 36.5714px; box-sizing: border-box !important; word-wrap: break-word !important; background-color: rgb(255, 255, 255);"><img class="" data-ratio="1" data-s="300,640" src="http://mmbiz.qpic.cn/mmbiz_jpg/dx3KibwtDhvfh2wVX4NftfnfjcZWIKK6EQDWtTTsYwjfQBnsqkThAZP5OlDmg5S3g22gSqMWhAxr2O4MydSJHnQ/640?wx_fmt=jpeg" data-type="jpeg" data-w="258" style="box-sizing: border-box !important; word-wrap: break-word !important; visibility: visible !important; width: auto !important;" width="auto" /></p><p style="max-width: 100%; min-height: 1em; font-size: 12px; text-indent: 0em; 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; font-size: 12px; text-indent: 0em; 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; font-size: 16px; 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; font-size: 12px; text-indent: 0em; 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; font-size: 12px; text-indent: 0em; 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; font-size: 12px; text-indent: 0em; 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; font-size: 12px; text-indent: 0em; 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 style="max-width: 100%; min-height: 1em; 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;" /></p><p><br /></p><p><br /></p>
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发表于 2020-10-19 23:18:01