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onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="8ajzkpe" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/shhxzdh/637425141729088931/8416823.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="yb8okwr" class="content"><p><span>需求數(shù)量：</span>0</p><p><span>價(jià)格要求：</span>面議</p><p><span>所在地：</span>上海市</p><p><span>包裝要求：</span><span style="color: #f30;"></span></p><p><span>產(chǎn)品關(guān)鍵詞：</span>4-20mA編碼器定制,編碼器</p><p><span>***更新：</span>2021-01-18 03:12:59</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="3ptu2dq" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">桁萱自動(dòng)化科技（上海）有限公司</a></p><p><span>聯(lián)系人：</span>儲(chǔ)焰青</p><p><span>郵箱: </span>272205845@qq.com</p><p><span>電話(huà): </span>18017028721</p><p><span>傳真: </span>021_</p><p><span>網(wǎng)址: </span>http://www.sh-hengxuan.com</p><p><span>手機(jī): </span>021-57658113</p><p><span>地址: </span>嘉好路1333號(hào)501</p><p>[當(dāng)前離線(xiàn)] <a rel="nofollow"> [加為商友] </a><a rel="nofollow"> [發(fā)送信件] </a></p></div></div><div id="asy8wio" class="page-proshow02"><p class="title">詳細(xì)說(shuō)明</p><div id="roamm2x" class="box"><p><p style="text-indent:25px">編碼器由機(jī)械位置決定的每個(gè)位置，它無(wú)需記憶，無(wú)需找參考點(diǎn)，而且不用一直計(jì)數(shù)，什么時(shí)候需要知道位置，什么時(shí)候就去讀取它的位置。這樣，編碼器的抗干擾特性、數(shù)據(jù)的可靠性較大提高了。由于編碼器在位置定位方面明顯地優(yōu)于增量式編碼器，已經(jīng)越來(lái)越多地應(yīng)用于工控定位中。測(cè)速度需要可以無(wú)限累加測(cè)量，目前增量型編碼器在測(cè)速應(yīng)用方面仍處于無(wú)可取代的主流位置。旋轉(zhuǎn)單圈編碼器，以轉(zhuǎn)動(dòng)中測(cè)量光碼盤(pán)各道刻線(xiàn)，以獲取編碼，當(dāng)轉(zhuǎn)動(dòng)超過(guò)360度時(shí)，編碼又回到原點(diǎn)，4-20mA編碼器定制，4-20mA編碼器定制，這樣就不符合編碼的原則，4-20mA編碼器定制，這樣的編碼器只能用于旋轉(zhuǎn)范圍360度以?xún)?nèi)的測(cè)量。編碼器使用某種方式表示并記憶物體的位置，角度和圈數(shù)。4-20mA編碼器定制</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="4-20mA編碼器定制,編碼器" src="https://tyunfile.71360.com/UploadFile/shhxzdh/637425141729088931/8416823.png"></div><p style="text-indent:25px">編碼器干擾的問(wèn)題，選擇什么樣的輸出對(duì)抗干擾也很重要，一般輸出帶反向信號(hào)的抗干擾要好一些，即A+~A-,B+~B-,Z+~Z-，其特征是加上電源8根線(xiàn)，而不是5根線(xiàn)(共零)。帶反向信號(hào)的在電纜中的傳輸是對(duì)稱(chēng)的，受干擾小，在接受設(shè)備中也可以再增加判斷（例如接受設(shè)備的信號(hào)利用A、B信號(hào)90°相位差，讀到電平10、11、01、00四種狀態(tài)時(shí)，計(jì)為一有效脈沖，此方案可有效提高系統(tǒng)抗干擾性能（計(jì)數(shù)準(zhǔn)確））。何為長(zhǎng)線(xiàn)驅(qū)動(dòng)？普通型編碼器能否遠(yuǎn)距離傳送？長(zhǎng)線(xiàn)驅(qū)動(dòng)也稱(chēng)差分長(zhǎng)線(xiàn)驅(qū)動(dòng)，5V，TTL的正負(fù)波形對(duì)稱(chēng)形式，由于其正負(fù)電流方向相反，對(duì)外電磁場(chǎng)抵消，故抗干擾能力較強(qiáng)。普通型編碼器一般傳輸距離是100米，如果是24V HTL型且有對(duì)稱(chēng)負(fù)信號(hào)的，傳輸距離300-400米。湖南編碼器批發(fā)價(jià)編碼器選擇方面應(yīng)注意是什么呢？</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="4-20mA編碼器定制,編碼器" src="https://tyunfile.71360.com/UploadFile/shhxzdh/637425141745866100/8243873.png"></div><p style="text-indent:25px">如果使用編碼器（包括單圈 / 多圈）進(jìn)行位置測(cè)量，只要其目標(biāo)量程（即測(cè)量行程）在編碼器圈數(shù)范圍內(nèi)，設(shè)備系統(tǒng)就可以無(wú)需進(jìn)行任何位置計(jì)數(shù)和圈數(shù)累加方面的算法處理，直接引用編碼器輸出的反饋數(shù)據(jù)。換句話(huà)說(shuō)，位置測(cè)量將*取決于編碼器的反饋輸出，而與電氣控制系統(tǒng)無(wú)關(guān)，無(wú)論出現(xiàn)上述哪種電氣系統(tǒng)方面的意外故障，都不會(huì)因中斷檢測(cè)運(yùn)算進(jìn)程，而影響位置測(cè)量結(jié)果。這將幫助用戶(hù)省去設(shè)備恢復(fù)運(yùn)行時(shí)那些復(fù)雜的原點(diǎn)校準(zhǔn)初始化操作，從而縮短設(shè)備的停機(jī)時(shí)間，提升產(chǎn)線(xiàn)的總體運(yùn)營(yíng)效率。這種**、穩(wěn)定的位置檢測(cè)性能，其實(shí)就是使用（多圈）編碼器的意義和價(jià)值所在。</p><p style="text-indent:25px">無(wú)論使用哪種編碼器做位置反饋，只要出現(xiàn)下列情況都需要對(duì)編碼器進(jìn)行回零操作：編碼器與機(jī)械負(fù)載的傳動(dòng)連接斷開(kāi)后重新連接；與編碼器連接的上位系統(tǒng)因產(chǎn)品更換、固件更新...等原因記憶丟失；如此看來(lái)，在位置測(cè)量應(yīng)用中使用機(jī)械式編碼器，將有機(jī)會(huì)極大減少設(shè)備運(yùn)行過(guò)程中因系統(tǒng)位置丟失而進(jìn)行回零操作的次數(shù)，因此相對(duì)來(lái)講可靠性應(yīng)該算是較高的了。伺服電機(jī)編碼器是安裝在伺服電機(jī)上用來(lái)測(cè)量磁極位置和伺服電機(jī)轉(zhuǎn)角及轉(zhuǎn)速的一種傳感器，從物理介質(zhì)的不同來(lái)分，伺服電機(jī)編碼器可以分為光電編碼器和磁電編碼器，另外旋轉(zhuǎn)變壓器也算一種特殊的伺服編碼器，市場(chǎng)上使用的基本上是光電編碼器，不過(guò)磁電編碼器作為后起之秀，有可靠，價(jià)格便宜，抗污染等特點(diǎn)，有趕超的光電編碼器趨勢(shì)。反饋編碼指的是編碼器在一個(gè)特定的旋轉(zhuǎn)周期范圍內(nèi)不會(huì)出現(xiàn)重復(fù)的信號(hào)輸出，每個(gè)角度的位置編碼都是獨(dú)特的。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="4-20mA編碼器定制,編碼器" src="https://tyunfile.71360.com/UploadFile/shhxzdh/637425141777038101/4590580.png"></div><p style="text-indent:25px">在此討論中，增量式編碼器的輸出信號(hào)為方波信號(hào)，又可以分為帶換相信號(hào)的增量式編碼器和普通的增量式編碼器，普通的增量式編碼器具備兩相正交方波脈沖輸出信號(hào)A和B，以及零位信號(hào)Z；帶換相信號(hào)的增量式編碼器除具備ABZ輸出信號(hào)外，還具備互差120度的電子換相信號(hào)UVW，UVW各自的每轉(zhuǎn)周期數(shù)與電機(jī)轉(zhuǎn)子的磁極對(duì)數(shù)一致。帶換相信號(hào)的增量式編碼器的UVW電子換相信號(hào)的相位與轉(zhuǎn)子磁極相位，或曰電角度相位之間的對(duì)齊方法如下：用一個(gè)直流電源給電機(jī)的UV繞組通以小于額定電流的直流電，U入，V出，將電機(jī)軸定向至一個(gè)平衡位置。編碼器的優(yōu)點(diǎn):體積小，精密，本身分辨度可以很高，無(wú)接觸無(wú)磨損。湖南編碼器批發(fā)價(jià)</p><p style="text-indent:25px">編碼器的耗電流，在PLC的電源功率范圍內(nèi)。4-20mA編碼器定制</p><p style="text-indent:25px">增量編碼器的信號(hào)選擇應(yīng)選擇具有反相信號(hào)通道的輸出信號(hào)，如帶 A+、A-，B+、B-，Z+、Z- 的6通道信號(hào)輸出類(lèi)型的增量編碼器，無(wú)論是TTL類(lèi)型還是HTL類(lèi)型。這樣的編碼器信號(hào)方式中，干擾源對(duì)于編碼器正反相的信號(hào)的干擾作用相當(dāng)，干擾在編碼器接收設(shè)備中可抵消，此類(lèi)增量編碼器信號(hào)傳遞可達(dá)到無(wú)干擾傳輸，傳遞也更遠(yuǎn)。這種傳送的特點(diǎn)是：如果一個(gè)干擾脈沖過(guò)來(lái)，它將在電纜上引起感應(yīng)，如果電纜芯為雙絞線(xiàn)，脈沖干擾將被差分電壓去掉。選擇雙絞屏蔽電纜。編碼器自帶的用于輸出信號(hào)的信號(hào)傳輸電纜，以及外接的延長(zhǎng)現(xiàn)場(chǎng)信號(hào)電纜，都應(yīng)選用雙絞屏蔽電纜，并且電纜需要有高密度高導(dǎo)通性的金屬細(xì)線(xiàn)編織成的屏蔽保護(hù)層，可以吸收外部輻射的高頻電磁場(chǎng)變化，從而起到屏蔽保護(hù)的作用。若將電磁屏蔽層接地，它可同時(shí)兼有靜電屏蔽作用，對(duì)電磁波的屏蔽效果也會(huì)更好。通常作為傳輸線(xiàn)使用的銅質(zhì)網(wǎng)狀屏蔽電纜接地時(shí)就能同時(shí)起到電磁屏蔽和靜電屏蔽的作用。4-20mA編碼器定制</p></p><br /><p>文章來(lái)源地址: http://m.cdcfah.com/cp/2894059.html</p></div></div></div></div></div><div id="qtzfg3h" class="page-right twoColRt"><div id="dbcioeo" class="box01 margin10 clearfix"><h3><a href="http://m.cdcfah.com/cp/">猜你喜歡</a></h3><div id="aipql8y" class="recomPic likePro"><a href="http://m.cdcfah.com/cp/814588.html"><div><img 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