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<p style="white-space: normal;"><img class="rich_pages js_insertlocalimg" data-backh="117" data-backw="578" data-cropselx1="0" data-cropselx2="578" data-cropsely1="0" data-cropsely2="117" data-ratio="0.2015625" data-s="300,640" src="http://mmbiz.qpic.cn/mmbiz_jpg/dx3KibwtDhvdaoLyYB5XBZDWW5tA6THRq1aemdicXWypwZ4kriaz1lY37fcH7CuVpSdjhcpWCXoLcibzLx4gam6U2A/640?wx_fmt=jpeg" data-type="jpeg" data-w="1280" style="width: 100%;height: auto;" /><br /></p><section style="font-variant-numeric: normal;font-variant-east-asian: normal;max-width: 100%;line-height: 27.2px;widows: 1;background-color: rgb(255, 255, 255);box-sizing: border-box !important;overflow-wrap: break-word !important;"><section powered-by="gulangu" style="max-width: 100%;box-sizing: border-box !important;overflow-wrap: break-word !important;"><section style="max-width: 100%;box-sizing: border-box !important;overflow-wrap: break-word !important;"><section powered-by="gulangu"><section powered-by="gulangu"><p style="font-family: -apple-system-font, BlinkMacSystemFont, "Helvetica Neue", " ingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif;letter-spacing: 0.544px;white-space: normal;"><strong><span style="font-size: 15px;">故障现象</span></strong><span style="font-size: 15px;"><br style="overflow-wrap: break-word;color: rgb(68, 68, 68);font-family: Tahoma, Helvetica, SimSun, sans-serif;font-size: 14px;text-align: start;white-space: normal;background-color: rgb(255, 255, 255);" /> 超声图像出现暗线。<br style="overflow-wrap: break-word;color: rgb(68, 68, 68);font-family: Tahoma, Helvetica, SimSun, sans-serif;font-size: 14px;text-align: start;white-space: normal;background-color: rgb(255, 255, 255);" /> GE Logiq9彩超的超声图像上有1条暗线，暗线区域内无回波信号，形成图像时移动探头的位置，而暗线的位置始终固定不变。<br style="overflow-wrap: break-word;color: rgb(68, 68, 68);font-family: Tahoma, Helvetica, SimSun, sans-serif;font-size: 14px;text-align: start;white-space: normal;background-color: rgb(255, 255, 255);" /><strong>故障分析</strong><br style="overflow-wrap: break-word;color: rgb(68, 68, 68);font-family: Tahoma, Helvetica, SimSun, sans-serif;font-size: 14px;text-align: start;white-space: normal;background-color: rgb(255, 255, 255);" /> 在机器探头打上耦合剂后扫描，发现图像暗线的边缘比较明显，根据超声图像形成和彩超结构的原理分析，故障原因可能是对应的探头晶片出现问题或对应的通道有问题；切换不同探头进行测试发现，每个探头均有同类的暗线存在，每个探头同时有晶片损坏的可能性较小，可以排除探头损坏，而故障可能发生在对应的通道板上。<br /></span></p><p style="text-align: center;margin-top: 5px;margin-bottom: 5px;"><img class="rich_pages js_insertlocalimg" data-backh="535" data-backw="340" data-ratio="1.5735294117647058" data-s="300,640" src="http://mmbiz.qpic.cn/mmbiz_jpg/dx3KibwtDhvfqLwSeqjLWGP7fJsFpAAy2ibBJEJvWk2IyBzYbQ1ejV6ogHCa3ZGToseo33srC3S0Z4ckW0NkmnKQ/640?wx_fmt=jpeg" data-type="jpeg" data-w="340" style="width: 100%;height: auto;" /></p><p style="text-align: left;margin-top: 5px;margin-bottom: 5px;"><strong style="font-family: -apple-system-font, BlinkMacSystemFont, "Helvetica Neue", "ingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif;font-size: 15px;letter-spacing: 0.544px;white-space: normal;widows: 1;background-color: rgb(255, 255, 255);">故障排除</strong><br style="letter-spacing: 0.544px;white-space: normal;widows: 1;overflow-wrap: break-word;color: rgb(68, 68, 68);font-family: Tahoma, Helvetica, SimSun, sans-serif;font-size: 14px;text-align: start;background-color: rgb(255, 255, 255);" /><span style="font-family: -apple-system-font, BlinkMacSystemFont, "Helvetica Neue", "ingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif;font-size: 15px;letter-spacing: 0.544px;widows: 1;background-color: rgb(255, 255, 255);"> GE Logiq9彩超前端有8块通道板，执</span><span style="font-family: -apple-system-font, BlinkMacSystemFont, "Helvetica Neue", "ingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif;font-size: 15px;letter-spacing: 0.544px;widows: 1;background-color: rgb(255, 255, 255);">行对应的超声波发射和接收以及A/D转换，8块通道板对应不同的探头通道，每个板处理24个通道。</span><span style="font-family: -apple-system-font, BlinkMacSystemFont, "Helvetica Neue", "ingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif;font-size: 15px;letter-spacing: 0.544px;widows: 1;background-color: rgb(255, 255, 255);">在显示器图像上标记好对应的暗线位置，关机，交换通道板的位置，当交换到第4块通道板时，图像上对应的暗线位置发生移动，再用另一块通道板与第4块通道板交叉检查，判断故障出现在第4块通道板，更换此通道板后机器恢复正常。</span></p><p><span style="font-family: -apple-system-font, BlinkMacSystemFont, "Helvetica Neue", "ingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif;letter-spacing: 0.544px;font-size: 15px;"><strong>故障小结</strong><br style="overflow-wrap: break-word;color: rgb(68, 68, 68);font-family: Tahoma, Helvetica, SimSun, sans-serif;font-size: 14px;text-align: start;white-space: normal;background-color: rgb(255, 255, 255);" /> 现代高端彩超的信号处理通道板通常有2块、4块甚至8块，这些通道板完全相同，当出现图像有黑影现象时，可调换通道板之间的位置，采用替换法达到诊断的目的，准确锁定故障部件。</span></p><p><span 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发表于 2020-10-19 22:39:38