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href="http://www.cdcfah.com/cp/third-ylsb_qtflpd/">其它未分類</a>?柳州OLYMPUSUES40高頻電刀主機芯片級維修服務(wù)至上成都鐳伙醫(yī)修平臺供應(yīng)</p><div id="hgdv4o3" class="leftbox clearfix"><h1>柳州OLYMPUSUES40高頻電刀主機芯片級維修服務(wù)至上成都鐳伙醫(yī)修平臺供應(yīng)</h1><div id="ps28bdf" class="proBig"><div id="d2l97k9" class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/leihuo/637397532491920781/9662491.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="cgargzw" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/leihuo/637397532491920781/9662491.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="q8p97fe" class="content"><p><span>需求數(shù)量：</span>0</p><p><span>價格要求：</span>面議</p><p><span>所在地：</span>四川省</p><p><span>包裝要求：</span><span style="color: #f30;"></span></p><p><span>產(chǎn)品關(guān)鍵詞：</span>柳州OLYMPUSUES40高頻電刀主機芯片級維修,UES40</p><p><span>***更新：</span>2020-12-14 04:12:31</p><p><span id="click" >瀏覽次數(shù)：0次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="y2ds9t4" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">成都鐳伙科技有限公司</a></p><p><span>聯(lián)系人：</span>邱鋒</p><p><span>郵箱: </span>cdleihuokeji@163.com</p><p><span>電話: </span>13982269628</p><p><span>傳真: </span>028_</p><p><span>網(wǎng)址: </span></p><p><span>手機: </span>028-8444323</p><p><span>地址: </span>新都區(qū)踏水路創(chuàng)想大廈2單元2606</p><p>[當前離線] <a rel="nofollow"> [加為商友] </a><a rel="nofollow"> [發(fā)送信件] </a></p></div></div><div id="quw20g9" class="page-proshow02"><p class="title">詳細說明</p><div id="nh8ee8c" class="box"><p><p> 六)聲束切片厚度指線陣、凸陣和相控陣換能器在垂直于掃描平面方向上的厚度。切片越薄，柳州OLYMPUSUES40高頻電刀主機芯片級維修，圖像越清晰，反之會導致圖像壓縮，產(chǎn)生偽像。切片厚度取決于晶片短軸方向的尺寸和固有頻率。解決方法：通常在晶片前加裝聚焦聲透鏡和在整機中采用聚焦技術(shù)。(七)對比度分辨力指在圖像上能夠檢測出的回波幅度的小差別。對比度分辨力越好，圖像的層次感越強，細節(jié)信息越豐富，圖像越細膩柔和。影響這一因素的原因,主要取決于聲信號的頻寬和顯示電路的灰階。(八)工作頻率、帶寬、重復頻率１．工作頻率工作頻率是指超聲探頭發(fā)射頻率，它既與探頭晶振的固有頻率有關(guān)，也與發(fā)射振蕩電路的其他參數(shù)有關(guān)．２．帶寬在脈沖回波系統(tǒng)中所發(fā)射的是脈沖超聲波，這種脈沖群只有很短的持續(xù)時間．根據(jù)頻譜分析可知，柳州OLYMPUSUES40高頻電刀主機芯片級維修，一個脈沖包含有許多諧波，即有一個頻帶的寬度；這個含有許多諧波的寬帶就稱為帶寬；其大能量集中在中心頻率附近．同時也可推知：當脈沖頻率為１.MHz時，柳州OLYMPUSUES40高頻電刀主機芯片級維修，其脈沖群的持續(xù)時間只有1μs(微秒)；而Ｂ型超聲診斷儀的實際脈沖（工作）頻率是大于１.MHz的，則持續(xù)時間是小于1μs(微秒)．．３．重復頻率超聲診斷儀發(fā)射的超聲波是脈沖信號；按一定時間間隔重復地發(fā)射同樣的脈沖信號。如果發(fā)現(xiàn)軌跡球打開清潔之后，操作仍然不靈敏，請及時聯(lián)系維修商。柳州OLYMPUSUES40高頻電刀主機芯片級維修</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="柳州OLYMPUSUES40高頻電刀主機芯片級維修,UES40" src="https://tyunfile.71360.com/WaterMark/UploadFile/leihuo/637397532491920781/9662491.png"></div><p> (一）盲區(qū)盲區(qū)是指B超設(shè)備可以識別的近回波目標深度。盲區(qū)小則有利于檢查出接近體表的病灶，這一性能主要取決于放大器的特性和可變孔徑技術(shù)的牲能。此外減小進入放大器的發(fā)射脈沖幅度和調(diào)節(jié)放大器時間常數(shù)，也會影響盲區(qū)大小。但是，對加有水囊的換能器測試，其盲區(qū)無意義。(二)探測深度B超設(shè)備在圖像正常顯示、允許的大靈敏度和亮度條件下，所觀測到回波目標的大深度稱為探測深度。該值越大，越能在生物體內(nèi)更大范圍進行檢查。影響這一性能的因素有以下幾種原因：1．換能器靈敏度換能器在發(fā)射和接收超聲波過程中，實現(xiàn)了電→聲和聲→電轉(zhuǎn)換效能。靈敏度越高，探測深度越大。靈敏度主要取決于晶片的機電性能和換能器聲、電匹配層的匹配狀況。2.發(fā)射功率提高換能器輻射的聲功率可提高探測深度。但是提高聲功率要增大電路的發(fā)射電壓。這不*給整機設(shè)計帶來困難，而且必須限制聲功率在安全劑量閾值內(nèi)，其安全劑量閾值的技術(shù)指標常用聲強來表示，即聲強應(yīng)不大于10mW/cm2。3.接收放大器增益提高接收放大器增益可提高探測深度。但是放大器增益的提高，在放大回波弱信號的同時，也放大了系統(tǒng)噪聲信號，從而使有用信號淹沒在噪聲中，故增益要適中。柳州OLYMPUSUES40高頻電刀主機芯片級維修探頭接口受到液體的侵蝕</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="柳州OLYMPUSUES40高頻電刀主機芯片級維修,UES40" src="https://tyunfile.71360.com/WaterMark/UploadFile/leihuo/637397532522291856/400470.png"></div><p> 醫(yī)用直線加速器模式轉(zhuǎn)換系統(tǒng)的機械部分包括電離室的轉(zhuǎn)換和靶-箔的轉(zhuǎn)換。電離室及靶-箔均在小機頭內(nèi)。小機頭自身要經(jīng)常運動，電離室及靶-箔也是運動的，使用多年后，易出現(xiàn)故障?，F(xiàn)介紹兩例模式轉(zhuǎn)換故障和檢修過程，可供同行參考。1故障一故障現(xiàn)象電子線模式轉(zhuǎn)換到X線模式時，出現(xiàn)安全聯(lián)鎖，檢查面板(RE-SEARCHPANEL)上MODE亮。分析與檢修將照射野擴到比較大，看到電子線電離室仍在小機頭中心，說明在電子線轉(zhuǎn)換到X線過程中，電離室架沒動。正常情況，K3得電吸合，-24V驅(qū)動電機反轉(zhuǎn)，X線電離室移至小機頭中心，相應(yīng)的限位開關(guān)動作，電機停轉(zhuǎn)。由于電離室，靶-箔在小機頭內(nèi)部，小機頭內(nèi)各部件重量大，拆裝困難，應(yīng)先排除機械故障，盡量不拆機頭。在X線模式下，測STB7-25，無-24V，沒得電，在機架別處取一-24V，接到STB7-25，電離室架運動正常，X線電離室可移至小機頭中心?？膳懦龣C械故障，問題出在K3線圈回路。K3線圈工作線路：當選擇X線模式時，H1J1-13從控制臺得到24V。24V經(jīng)靶限位開關(guān)S5的常閉觸點，使K5動作，靶-箔驅(qū)動電機得電，先進行靶-箔轉(zhuǎn)換。當靶運動到位后，S5動作，K5失電，同時S5的常開觸點接通K3回路。之后24V再經(jīng)靶-箔聯(lián)鎖開關(guān)S6、S7、S8、S9的常閉觸點。</p><p> 出口的流量即呼吸管道的通氣量增加。在呼氣相，移動線圈(膜片)的開放位移，使壓力閥內(nèi)的壓力減小，由管道接頭上的排氣孔排放出二氧化碳。3常見故障現(xiàn)象和排除通電后聽到內(nèi)置電動風機轉(zhuǎn)動的氣流聲，但氣道內(nèi)無氣輸出。檢查：拆開機后讓壓力控制閥暴露，開放呼吸管路，通電開機數(shù)次，觀察到排氣閥的膜片在通電后不能與排氣閥口密閉，壓力氣體從排氣閥排出，使得呼吸管道無壓力。斷電后翻轉(zhuǎn)呼吸機讓壓力控制閥的排氣口和膜片處在水平，膜片和移動線圈在重力作用下置于比較大開口位置，用手扶膜片向閉合位置(向上)移動，感覺運動不順暢。判斷不是移動線圈和磁鐵的縫隙之間有臟物就是線圈發(fā)生變形，由于機械位移受阻造成閥門閉合失常。故障排除：焊開移動線圈引線，取下線圈和膜片組件，清潔了塵埃重新裝配之后，線圈和膜片的移動平滑無阻，呼吸機工作恢復了正常。絕大多數(shù)設(shè)計了空氣流動的窗口，且配有過濾網(wǎng)以免灰塵過多進入系統(tǒng)。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="柳州OLYMPUSUES40高頻電刀主機芯片級維修,UES40" src="https://tyunfile.71360.com/UploadFile/leihuo/637397532522291856/400470.png"></div><p> 加速器的型號：新華600C出現(xiàn)HVOC聯(lián)鎖？高壓過流（HVOC）是指仿真線充電電流過大，分為平均值過流和峰值過流兩種情況。當然也不排除是檢測電路受到干擾形成的“假過流”現(xiàn)象。峰值過流：一般由于電路有小打火，單個或幾個脈沖充電電流過大而引起。發(fā)生均值過流可能的原因：l主閘流管連續(xù)導通l重復頻率超過額定值l負載短路l放未取下若使用過程中出現(xiàn)HVOC，隨即清掉，并且出現(xiàn)頻率不高，原因很可能是電路輕微打火，若頻繁過流，甚至導致無法出束，則可能是均值過流引起的。主閘流管連續(xù)導通，有可能是系統(tǒng)正失配造成的，重復頻率超過額定值的原因很復雜，需要具體分析，后兩種情況比較明了，一看便知。故障原因是：反峰二極管被擊穿，更換后就正常。關(guān)于反峰的又一實例：一加速器，之前使用正常，突然出反峰，并且出高壓，隨即出反峰。（1）檢查反峰聯(lián)鎖檢測電路沒有問題。（2）高壓接地線沒有接錯和松動。（3）磁控管燈絲和加速管電子燈絲電壓正常。（4）由于反峰聯(lián)鎖是突然出現(xiàn)的，排除磁控管老化造成故障的可能性。（5）去掉電子燈絲和磁控管燈絲電纜，將脈沖變壓器高壓輸出接假負載（接線上有負高壓，約－5kV，注意安全），屏蔽掉相應(yīng)的聯(lián)鎖，出高壓測試，依然出反峰。對于多雨的地區(qū)，要勤于檢查地線的有效性。柳州OLYMPUSUES40高頻電刀主機芯片級維修</p><p style="text-indent:25px">科室老師欣喜的發(fā)現(xiàn)，軌跡球操作起來靈敏了許多，工作效率也提高了！柳州OLYMPUSUES40高頻電刀主機芯片級維修</p><p> 就檢測不到有片子通過，因而造成卡片。那么怎樣粗略地估算它的靈敏度呢?我們用未曝過光膠片而洗出來的片子，透光性好，用來定量估測。將廢片裁成10小片，一邊測光電管的輸出，一邊一片一片地插入檢測孔，當插入6片時，光電管輸出變?yōu)楦唠娖剑瑒t靈敏度就定為6片。為了減少誤動作，將靈敏度設(shè)在3片。則將電阻調(diào)大，以降低發(fā)光管強度。當電阻調(diào)到2kΩ時，光電管輸出才為高電平。于是將2kΩ的固定電阻裝上。經(jīng)這樣處理后，儀器能正常使用。近半年來，此類故障再也沒有發(fā)生過。這種3362精密電位器，在開機加電、氣溫變化、振動等情況下有時會接觸不良，誘發(fā)軟故障。根據(jù)同行反映，這種電位器有時還會造成主板死機。這**提供的是一個視角，在維修時可少走彎路，減少損失，以此供同行參考。柳州OLYMPUSUES40高頻電刀主機芯片級維修</p><p style="text-indent:25px">成都鐳伙科技有限公司致力于儀器儀表，是一家服務(wù)型的公司。公司業(yè)務(wù)分為內(nèi)窺鏡以及維修周邊，動力系統(tǒng)及手柄附件維修，攝像系統(tǒng)主機及攝像頭維修，手術(shù)器械類維修等，目前不斷進行創(chuàng)新和服務(wù)改進，為客戶提供良好的產(chǎn)品和服務(wù)。公司注重以質(zhì)量為中心，以服務(wù)為理念，秉持誠信為本的理念，打造儀器儀表良好品牌。成都鐳伙科技憑借創(chuàng)新的產(chǎn)品、專業(yè)的服務(wù)、眾多的成功案例積累起來的聲譽和口碑，讓企業(yè)發(fā)展再上新高。</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/2395315.html</p></div></div></div></div></div><div id="s8c94zo" class="page-right twoColRt"><div id="j7y99s9" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="cl2vcbx" class="recomPic 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