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</span>138_</p><p><span>網(wǎng)址: </span>http://xalunqian.shop.88360.com</p><p><span>手機(jī): </span>138-91837328</p><p><span>地址: </span>高新區(qū)發(fā)展大道25號(hào)軍民融合創(chuàng)新港</p><p>[當(dāng)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="7c4dx7c" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="kzro2w8" class="box"><p><p> 導(dǎo)波式雷達(dá)物位計(jì)：優(yōu)點(diǎn)：與超聲波及雷達(dá)料位計(jì)相比，工作穩(wěn)定可靠；同雷達(dá)料位計(jì)一樣，反射信號(hào)的強(qiáng)度取決于被測(cè)物料的介電率或?qū)щ娐?，但?dǎo)波式可以測(cè)量更低介電率的物料。缺點(diǎn)：雙桿（纜）及同軸管式導(dǎo)波體由于電場(chǎng)能量集中，易受外部結(jié)構(gòu)影響；在桿之間（或管內(nèi)部）易積料，產(chǎn)生虛假回波，影響測(cè)量效果；埋在物料中的纜繩由于物料重力會(huì)產(chǎn)生較大的下拉力，造成纜繩被拉斷等故障。 </p> <p> 音叉式物位開關(guān)：優(yōu)點(diǎn)：音叉物位開關(guān)是易于使用，吉林超聲波物位計(jì)推薦，吉林超聲波物位計(jì)推薦，沒有校準(zhǔn)要求，由于沒有機(jī)械運(yùn)動(dòng)部件，吉林超聲波物位計(jì)推薦，不存在日常維修需要。該音叉物位開關(guān)不受絕緣系數(shù)的影響該開關(guān)也可替換阻旋式葉片料位開關(guān)用于物料太輕的場(chǎng)合。它還可探測(cè)到浸沒在低粘度液體中的粒狀物料，例如沙，碎石或聚酯切片在水中。高頻的調(diào)頻雷達(dá)技術(shù)尤其適合大型固體料倉的物位測(cè)量!吉林超聲波物位計(jì)推薦</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="吉林超聲波物位計(jì)推薦,物位計(jì)" src="https://tyunfile.71360.com/WaterMark/UploadFile/xalunqian/637333661851611328/5177133.png"></div><p> 電容式物位計(jì)是專門為容器、管道、儲(chǔ)罐、料倉、坑池等內(nèi)部的液體和散裝固體材料的連續(xù)物位檢測(cè)而設(shè)計(jì)的，由外殼、電子電路和測(cè)量電極組成。電路部分將電容值范圍轉(zhuǎn)換為電流信號(hào)（4...20 mA）或電壓信號(hào)（0...10 V）。測(cè)量電極有多種形式：探棒電極、纜電極等。部分型號(hào)的電極帶有涂層，這對(duì)于粘性的、腐蝕性的、導(dǎo)電性的被測(cè)介質(zhì)來說非常重要。探棒電極還有帶參考管的產(chǎn)品可選，可用于非導(dǎo)電性容器內(nèi)的液體液位測(cè)量。該系列物位計(jì)的類別為：N-普通型（用于非性危險(xiǎn)區(qū)域），NT-耐高溫型。同時(shí)，有多種過程連接方式（英制螺紋、管螺紋、圓錐管螺紋NPT）可選。吉林超聲波物位計(jì)推薦物位計(jì)可廣應(yīng)用于各行業(yè)中液體及固體料倉物位的連續(xù)測(cè)量。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="吉林超聲波物位計(jì)推薦,物位計(jì)" src="https://tyunfile.71360.com/WaterMark/UploadFile/xalunqian/637333661917324219/194433.png"></div><p> 超聲波測(cè)量的工作原理： </p> <p> 超聲波是機(jī)械波的一種，即是機(jī)械振動(dòng)在彈性介質(zhì)中的一種傳播過程，它的特征是頻率高、波長(zhǎng)短、繞射現(xiàn)象小，另外方向性好，能夠成為射線而定向傳播。超聲波在液體、固體中衰減很小，因而穿透能力強(qiáng)，尤其是在對(duì)光不透明的固體中，超聲波可穿透幾十米的長(zhǎng)度，碰到雜質(zhì)或界面就會(huì)有明顯的反射，超聲波測(cè)量物位就是利用了它的這一特征。 </p> <p> 在超聲波檢測(cè)技術(shù)中，不管那種超聲波儀器，都必須把電能轉(zhuǎn)換超聲波發(fā)射出去，再接收回來變換成電信號(hào)，完成這項(xiàng)功能的裝置就叫超聲波換能器，也稱探頭。如圖所示，將超聲波換能器置于被測(cè)液體上方，向下發(fā)射超聲波，超聲波穿過空氣介質(zhì)，在遇到水面時(shí)被反射回來，又被換能器所接收并轉(zhuǎn)換為電信號(hào)，電子檢測(cè)部分檢測(cè)到這一信號(hào)后將其變成液位信號(hào)進(jìn)行顯示并輸出。 </p><p> 重錘式料位計(jì)：優(yōu)點(diǎn)：測(cè)量不受介質(zhì)密度、顆粒大小的影響。缺點(diǎn)：機(jī)械內(nèi)部易落灰塵影響測(cè)量效果；機(jī)械磨損較嚴(yán)重，需經(jīng)常維護(hù)，花費(fèi)較大；重錘易發(fā)生被物料埋住現(xiàn)象，發(fā)生掉錘頭、斷帶故障。 </p> <p> 超聲波物位計(jì)：優(yōu)點(diǎn)：安裝方便，性能穩(wěn)定，測(cè)量精度高，價(jià)格低廉。缺點(diǎn)：對(duì)溫度，粉塵，蒸汽，壓力的影響比較敏感。 </p> <p> 雷達(dá)物位計(jì)：優(yōu)點(diǎn)：安裝方便，性能穩(wěn)定，測(cè)量精度高。對(duì)溫度，壓力的影響不敏感，可以用來連續(xù)測(cè)量腐蝕性液體、高黏度液體和有毒液體的液位。它沒有可動(dòng)部件、不接觸介質(zhì)、沒有測(cè)量盲區(qū),而且測(cè)量精度幾乎不受被測(cè)介質(zhì)的溫度、壓力、相對(duì)介電常數(shù)的影響,在易燃易爆等惡劣工況下仍能應(yīng)用。缺點(diǎn)：價(jià)格高昂，低頻的雷達(dá)體積龐大。對(duì)射頻干擾的影響明顯。對(duì)被測(cè)介質(zhì)的介電常數(shù)有要求。對(duì)粉塵和蒸汽的影響和超聲是一樣的。天線容易積灰，影響測(cè)量超聲波物位計(jì)主芯片采用進(jìn)口工業(yè)級(jí)單片機(jī)，數(shù)字溫度補(bǔ)償和超寬電壓輸入穩(wěn)壓等數(shù)十塊相關(guān)**集成電路。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="吉林超聲波物位計(jì)推薦,物位計(jì)" src="https://tyunfile.71360.com/WaterMark/UploadFile/xalunqian/637333661961093750/9791720.png"></div><p> 液體、物位的測(cè)量：對(duì)于液面相對(duì)平穩(wěn)的罐體，且被測(cè)液體的介電常數(shù)較高，可以選擇普通雷達(dá)物位計(jì)。對(duì)于液面波動(dòng)大、或帶有攪拌的罐體，或被測(cè)液體的介電常數(shù)較低，應(yīng)推薦導(dǎo)波雷達(dá)。因?yàn)閷?dǎo)波管對(duì)液面有整型作用，且導(dǎo)波雷達(dá)的微波反射不易受環(huán)境條件變化的影響。被測(cè)液體的介電常數(shù)和密度變化對(duì)測(cè)量結(jié)果沒有影響。對(duì)于被測(cè)液體的粘度≥500cst，且液體粘附性較強(qiáng)的情況，不能選擇導(dǎo)波管方式測(cè)量，因?yàn)檎掣胶徒Y(jié)晶會(huì)堵死導(dǎo)波管。從而形成虛假物位?？梢赃x擇導(dǎo)波桿方式來測(cè)量。當(dāng)介質(zhì)在探頭上的涂污對(duì)測(cè)量物位的影響可分為兩種：膜狀涂污和橋接。膜狀涂污是在物位降低時(shí)，高粘液體或輕油漿在探頭上形成的一種覆蓋層。由于這種涂污在探頭上涂層均勻，因此對(duì)測(cè)量基本無影響；但橋接性涂污的形成卻能導(dǎo)致明顯的測(cè)量誤差，當(dāng)塊狀或條狀介質(zhì)污垢粘結(jié)于波導(dǎo)體上或橋接于兩個(gè)波導(dǎo)體之間時(shí)，就會(huì)在該點(diǎn)測(cè)得虛假物位。儀表的傳感器與灌壁及被測(cè)介質(zhì)形成導(dǎo)納值，電路單元將測(cè)量導(dǎo)納值轉(zhuǎn)換成物位信號(hào)輸出，實(shí)現(xiàn)物位測(cè)量。高頻脈沖雷達(dá)物位計(jì)電話</p><p style="text-indent:25px">超聲波物位計(jì)是集超聲、電子、軟件于一身的高科技產(chǎn)品，是各類工業(yè)現(xiàn)場(chǎng)測(cè)量液位、料位的優(yōu)先儀器。吉林超聲波物位計(jì)推薦</p><p> 導(dǎo)波雷達(dá)物位計(jì)，采用了可發(fā)出高頻率微波，沿著探桿傳播，由于遇到被測(cè)介質(zhì)，介電常數(shù)突變，引起反射。發(fā)射脈沖與反射脈沖的時(shí)間間隔與被測(cè)量介質(zhì)的距離成正比。特殊的時(shí)間延伸方法可以確保極短時(shí)間內(nèi)穩(wěn)定和精確的測(cè)量。即使存在虛假反射的時(shí)候，的微處理技術(shù)和軟件也可以準(zhǔn)確地分析出物位回波，儀表可以空倉調(diào)試。在固體測(cè)量中的應(yīng)用可以使用K-頻段的高頻傳感器。由于信號(hào)的聚焦效果非常好，料倉內(nèi)的安裝物或倉壁的粘附物都不會(huì)影響測(cè)量。 </p> <p> 工作原理:導(dǎo)波雷達(dá)物位計(jì)是基于時(shí)間行程原理的測(cè)量?jī)x表，雷達(dá)波以光速運(yùn)行，運(yùn)行時(shí)間可以通過電子部件被轉(zhuǎn)換成物位信號(hào)。探頭發(fā)出高頻脈沖并沿纜繩傳播，當(dāng)脈沖遇到物料表面時(shí)反射回來被儀表內(nèi)的jieshouiqi接收，并將距離信號(hào)轉(zhuǎn)化為物位信號(hào)。 </p> <p> 反射的脈沖信號(hào)沿纜式或桿式探頭傳導(dǎo)至儀表電子線路部分，微處理器對(duì)此信號(hào)進(jìn)行處理，識(shí)別出微波脈沖在物料表面所產(chǎn)生的回波。吉林超聲波物位計(jì)推薦</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/2655579.html</p></div></div></div></div></div><div id="uj8kcoq" class="page-right twoColRt"><div id="fpgywrd" class="box01 margin10 clearfix"><h3><a 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