Bently探頭330103-00-04-10-02-00

Bently探頭330103-00-04-10-02-00，武漢百士自動化設(shè)備有限公司供應(yīng)產(chǎn)品，美國本特利Bently探頭，原廠原裝，現(xiàn)貨庫存，價格優(yōu)惠；

電渦流傳感器能靜態(tài)和動態(tài)地非接觸、高線性度、高分辨力地測量被測金屬導(dǎo)體距探頭表面的距離。它是一種非接觸的線性化計量工具。電渦流傳感器能準(zhǔn)確測量被測體（必須是金屬導(dǎo)體）與探頭端面之間靜態(tài)和動態(tài)的相對位移變化。電渦流傳感器的原理是，通過電渦流效應(yīng)的原理，準(zhǔn)確測量被測體(必須是金屬導(dǎo)體)與探頭端面的相對位置，其特點(diǎn)是長期工作可靠性好、靈敏度高、抗干擾能力強(qiáng)、非接觸測量、響應(yīng)速度快、不受油水等介質(zhì)的影響，常被用于對大型旋轉(zhuǎn)機(jī)械的軸位移、軸振動、軸轉(zhuǎn)速等參數(shù)進(jìn)行長期實(shí)時監(jiān)測，可以分析出設(shè)備的工作狀況和故障原因，有效地對設(shè)備進(jìn)行保護(hù)及預(yù)維修。

傳感器經(jīng)常作為自動化產(chǎn)品的一部分，在我們?nèi)粘Ｉ�產(chǎn)生活中扮演著重要角色。它是現(xiàn)代科技的前沿技術(shù)，其水平高低也是衡量一個國家科技發(fā)展水平的重要標(biāo)志之一。市面上的傳感器多種多樣，玲瑯滿目，可供我們選擇的有很多。電感渦流傳感器等眾多高性能傳感器，被大量應(yīng)用在各行各業(yè)。特別是機(jī)床行業(yè)，以及汽車制造等行業(yè)更是應(yīng)用廣泛，是國內(nèi)外公認(rèn)的具有發(fā)展前途的高技術(shù)產(chǎn)業(yè)。

在高速旋轉(zhuǎn)機(jī)械和往復(fù)式運(yùn)動機(jī)械的狀態(tài)分析，振動研究、分析測量中，對非接觸的高精度振動、位移信號，能連續(xù)準(zhǔn)確地采集到轉(zhuǎn)子振動狀態(tài)的多種參數(shù)。如軸的徑向振動、振幅以及軸向位置。從轉(zhuǎn)子動力學(xué)、軸承學(xué)的理論上分析，大型旋轉(zhuǎn)機(jī)械的運(yùn)動狀態(tài)，主要取決于其核心—轉(zhuǎn)軸，而電渦流傳感器，能直接非接觸測量轉(zhuǎn)軸的狀態(tài)，對諸如轉(zhuǎn)子的不平衡、不對中、軸承磨損、軸裂紋及發(fā)生摩擦等機(jī)械問題的早期判定，可提供關(guān)鍵的信息。電渦流傳感器以其長期工作可靠性好、測量范圍寬、靈敏度高、分辨率高、響應(yīng)速度快、抗干擾力強(qiáng)、不受油污等介質(zhì)的影響、結(jié)構(gòu)簡單等優(yōu)點(diǎn)，在大型旋轉(zhuǎn)機(jī)械狀態(tài)的在線監(jiān)測與故障診斷中得到廣泛應(yīng)用 。

根據(jù)法拉第電磁感應(yīng)原理，塊狀金屬導(dǎo)體置于變化的磁場中或在磁場中作切割磁力線運(yùn)動時（與金屬是否塊狀無關(guān)，且切割不變化的磁場時無渦流），導(dǎo)體內(nèi)將產(chǎn)生呈渦旋狀的感應(yīng)電流，此電流叫電渦流，以上現(xiàn)象稱為電渦流效應(yīng)。而根據(jù)電渦流效應(yīng)制成的傳感器稱為電渦流式傳感器。

Bently探頭330103-00-04-10-02-00

本特利3300XL 8mm電渦流探頭，公制，位移探頭

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本特利3300XL 8mm電渦流探頭，公制，本特利振動探頭

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本特利3300XL 8mm電渦流探頭，公制，本特利位移探頭

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本特利3300XL 8mm電渦流探頭，公制，振動傳感器

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本特利3300XL 8mm電渦流探頭，公制，位移傳感器，振動傳感器

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前置器中高頻振蕩電流通過延伸電纜流入探頭線圈，在探頭頭部的線圈中產(chǎn)生交變的磁場。當(dāng)被測金屬體靠近這一磁場，則在此金屬表面產(chǎn)生感應(yīng)電流，與此同時該電渦流場也產(chǎn)生一個方向與頭部線圈方向相反的交變磁場，由于其反作用，使頭部線圈高頻電流的幅度和相位得到改變（線圈的有效阻抗），這一變化與金屬體磁導(dǎo)率、電導(dǎo)率、線圈的幾何形狀、幾何尺寸、電流頻率以及頭部線圈到金屬導(dǎo)體表面的距離等參數(shù)有關(guān)。通常假定金屬導(dǎo)體材質(zhì)均勻且性能是線性和各項(xiàng)同性，則線圈和金屬導(dǎo)體系統(tǒng)的物理性質(zhì)可由金屬導(dǎo)體的電導(dǎo)率б、磁導(dǎo)率ξ、尺寸因子τ、頭部體線圈與金屬導(dǎo)體表面的距離D、電流強(qiáng)度I和頻率ω參數(shù)來描述。則線圈特征阻抗可用Z=F(τ, ξ, б, D, I, ω)函數(shù)來表示。通常我們能做到控制τ, ξ, б, I, ω這幾個參數(shù)在一定范圍內(nèi)不變，則線圈的特征阻抗Z就成為距離D的單值函數(shù)，雖然它整個函數(shù)是一非線性的，其函數(shù)特征為“S”型曲線，但可以選取它近似為線性的一段。于此，通過前置器電子線路的處理，將線圈阻抗Z的變化，即頭部體線圈與金屬導(dǎo)體的距離D的變化轉(zhuǎn)化成電壓或電流的變化。輸出信號的大小隨探頭到被測體表面之間的間距而變化，電渦流傳感器就是根據(jù)這一原理實(shí)現(xiàn)對金屬物體的位移、振動等參數(shù)的測量。

當(dāng)被測金屬與探頭之間的距離發(fā)生變化時，探頭中線圈的Q值也發(fā)生變化，Q值的變化引起振蕩電壓幅度的變化，而這個隨距離變化的振蕩電壓經(jīng)過檢波、濾波、線性補(bǔ)償、放大歸一處理轉(zhuǎn)化成電壓（電流）變化，完成機(jī)械位移(間隙)轉(zhuǎn)換成電壓（電流）。由上所述，電渦流傳感器工作系統(tǒng)中被測體可看作傳感器系統(tǒng)的一半，即一個電渦流位移傳感器的性能與被測體有關(guān)。

按照電渦流在導(dǎo)體內(nèi)的貫穿情況，此傳感器可分為高頻反射式和低頻透射式兩類，但從基本工作原理上來說仍是相似的。電渦流式傳感器的特點(diǎn)是能對位移、厚度、表面溫度、速度、 應(yīng)力、材料損傷等進(jìn)行非接觸式連續(xù)測量，另外還具有體積小，靈敏度高，頻率響應(yīng)寬等特點(diǎn)，應(yīng)用較其廣泛。

電渦流傳感器系統(tǒng)以其獨(dú)特的優(yōu)點(diǎn)，廣泛應(yīng)用于電力、石油、化工、冶金等行業(yè)，對汽輪機(jī)、水輪機(jī)、發(fā)電機(jī)、鼓風(fēng)機(jī)、壓縮機(jī)、齒輪箱等大型旋轉(zhuǎn)機(jī)械的軸的徑向振動、軸向位移、鑒相器、軸轉(zhuǎn)速、脹差、偏心、油膜厚度等進(jìn)行在線測量和安全保護(hù)，以及轉(zhuǎn)子動力學(xué)研究和零件尺寸檢驗(yàn)等方面。

電感線圈產(chǎn)生的磁力線經(jīng)過金屬導(dǎo)體時，金屬導(dǎo)體就會產(chǎn)生感應(yīng)電流，且呈閉合回路，類似于水渦流形狀，故稱之為電渦流也叫做電渦流效應(yīng)，其實(shí)是電磁感應(yīng)原理的延伸。

傳感器探頭里有小型線圈，由控制器控制產(chǎn)生震蕩電磁場，當(dāng)接近被測體時，被測體表面會產(chǎn)生感應(yīng)電流，而產(chǎn)生反向的電磁場。這時電渦流傳感器根據(jù)反向電磁場的強(qiáng)度來判斷與被測體之間的距離。注意：電渦流傳感器要求被測體必須是導(dǎo)體。