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  • 20219-24
    選購光電開關要了解這些知識

    光(guang)(guang)(guang)電(dian)(dian)(dian)開(kai)關(guan)(光(guang)(guang)(guang)電(dian)(dian)(dian)傳(chuan)感器(qi))是(shi)光(guang)(guang)(guang)電(dian)(dian)(dian)接(jie)近(jin)開(kai)關(guan)的(de)(de)簡稱,它是(shi)利(li)用被(bei)檢測(ce)物(wu)(wu)對(dui)光(guang)(guang)(guang)束的(de)(de)遮(zhe)擋或(huo)反(fan)射(she)(she),由同步回路(lu)接(jie)通電(dian)(dian)(dian)路(lu),從(cong)而檢測(ce)物(wu)(wu)體(ti)的(de)(de)有(you)無。物(wu)(wu)體(ti)不限于金屬(shu),所有(you)能反(fan)射(she)(she)光(guang)(guang)(guang)線(xian)(或(huo)者對(dui)光(guang)(guang)(guang)線(xian)有(you)遮(zhe)擋作用)的(de)(de)物(wu)(wu)體(ti)均可以被(bei)檢測(ce)。光(guang)(guang)(guang)電(dian)(dian)(dian)開(kai)關(guan)將輸入(ru)電(dian)(dian)(dian)流(liu)在發射(she)(she)器(qi)上轉(zhuan)(zhuan)換(huan)為(wei)光(guang)(guang)(guang)信(xin)號射(she)(she)出(chu),接(jie)收器(qi)再根(gen)據接(jie)收到的(de)(de)光(guang)(guang)(guang)線(xian)的(de)(de)強(qiang)弱或(huo)有(you)無對(dui)目(mu)標(biao)物(wu)(wu)體(ti)進行探(tan)測(ce)。安(an)防系統中常見的(de)(de)光(guang)(guang)(guang)電(dian)(dian)(dian)開(kai)關(guan)煙霧(wu)報警(jing)器(qi),工業中經常用它來計(ji)數機械(xie)臂的(de)(de)運(yun)動次數。光(guang)(guang)(guang)電(dian)(dian)(dian)開(kai)關(guan)是(shi)傳(chuan)感器(qi)的(de)(de)一種,它把發射(she)(she)端和接(jie)收端之(zhi)間光(guang)(guang)(guang)的(de)(de)強(qiang)弱變化(hua)轉(zhuan)(zhuan)化(hua)為(wei)電(dian)(dian)(dian)流(liu)的(de)(de)變化(hua)以達到探(tan)測(ce)的(de)(de)目(mu)的(de)(de)。由于光(guang)(guang)(guang)電(dian)(dian)(dian)開(kai)關(guan)輸出(chu)回...

  • 20216-21
    電纜中銅線和鋁線為什么不能直接連接呢?

    銅線(xian)(xian)(xian)和(he)鋁線(xian)(xian)(xian)可以通過一(yi)定的(de)方法連(lian)接(jie)(jie)(jie)(jie)在一(yi)起(qi)。銅線(xian)(xian)(xian)和(he)鋁線(xian)(xian)(xian)的(de)材質不同(tong),因(yin)此(ci)特性(xing)也不相同(tong),想要(yao)把它(ta)們連(lian)接(jie)(jie)(jie)(jie)在一(yi)起(qi),是需要(yao)通過特殊處(chu)(chu)(chu)理的(de)。那么纜普電(dian)纜中銅線(xian)(xian)(xian)和(he)鋁線(xian)(xian)(xian)為(wei)什(shen)(shen)么不能直(zhi)接(jie)(jie)(jie)(jie)連(lian)接(jie)(jie)(jie)(jie)呢?銅線(xian)(xian)(xian)和(he)鋁線(xian)(xian)(xian)怎么接(jie)(jie)(jie)(jie)呢?銅線(xian)(xian)(xian)和(he)鋁線(xian)(xian)(xian)為(wei)什(shen)(shen)么不能直(zhi)接(jie)(jie)(jie)(jie)連(lian)接(jie)(jie)(jie)(jie)呢?一(yi)、鋁線(xian)(xian)(xian)和(he)銅線(xian)(xian)(xian)的(de)電(dian)阻率不同(tong)。二(er)、這是比較關鍵(jian)的(de),就(jiu)是鋁線(xian)(xian)(xian)很(hen)空(kong)氣(qi)中很(hen)容易氧化(hua),在其表面形成(cheng)一(yi)層氧化(hua)物,再加(jia)上鋁比銅的(de)硬度小,這樣會大(da)大(da)增加(jia)鋁線(xian)(xian)(xian)和(he)銅線(xian)(xian)(xian)接(jie)(jie)(jie)(jie)駁處(chu)(chu)(chu)的(de)接(jie)(jie)(jie)(jie)觸電(dian)阻,當(dang)用(yong)電(dian)流通過這個接(jie)(jie)(jie)(jie)駁處(chu)(chu)(chu)時,接(jie)(jie)(jie)(jie)觸電(dian)阻會發熱(re),如果是大(da)電(dian)流,則發熱(re)會很(hen)嚴重,就(jiu)會把接(jie)(jie)(jie)(jie)駁處(chu)(chu)(chu)燒(shao)毀。三、...

  • 20213-20
    介紹編碼器的工作原理及構造

    編(bian)碼器是通(tong)過把(ba)機械角(jiao)度(du)物理量的(de)變(bian)化轉(zhuan)(zhuan)變(bian)成(cheng)電信號(hao)(hao)的(de)一種裝置(zhi);在傳(chuan)感器的(de)分類(lei)中,他(ta)歸屬于角(jiao)位移傳(chuan)感器。根(gen)據編(bian)碼器的(de)這(zhe)一特性,編(bian)碼器主要用(yong)于測量轉(zhuan)(zhuan)動(dong)物體的(de)角(jiao)位移量,角(jiao)速度(du),角(jiao)加速度(du),通(tong)過編(bian)碼器把(ba)這(zhe)些物理量轉(zhuan)(zhuan)變(bian)成(cheng)電信號(hao)(hao)輸出給(gei)控制系(xi)統(tong)或(huo)儀表,控制系(xi)統(tong)或(huo)儀表根(gen)據這(zhe)些量來控制驅(qu)動(dong)裝置(zhi)。由圓光(guang)(guang)柵和指示光(guang)(guang)柵組成(cheng)一對掃描(miao)(miao)系(xi)統(tong),在掃描(miao)(miao)系(xi)統(tong)的(de)一側投(tou)射一束紅外光(guang)(guang),在掃描(miao)(miao)系(xi)統(tong)的(de)另一側的(de)感光(guang)(guang)器件(jian)(jian)就可以收到(dao)掃描(miao)(miao)光(guang)(guang)信號(hao)(hao);當圓光(guang)(guang)柵轉(zhuan)(zhuan)動(dong)時,感光(guang)(guang)器件(jian)(jian)接收到(dao)的(de)掃描(miao)(miao)光(guang)(guang)信號(hao)(hao)會發(fa)生(sheng)變(bian)化,感光(guang)(guang)器件(jian)(jian)可以把(ba)光(guang)(guang)信號(hao)(hao)轉(zhuan)(zhuan)變(bian)成(cheng)電信號(hao)(hao)并輸...

  • 20211-12
    伺服電機是一種補助馬達間接變速裝置

    伺(si)服電(dian)(dian)機是(shi)(shi)指在伺(si)服系(xi)統(tong)中(zhong)(zhong)控(kong)制機械元(yuan)件運轉(zhuan)(zhuan)的(de)(de)發動(dong)機,是(shi)(shi)一(yi)種補助馬達間接(jie)變(bian)速(su)裝(zhuang)置。可(ke)使控(kong)制速(su)度(du),位置精度(du)非常(chang)準確,可(ke)以將(jiang)電(dian)(dian)壓信(xin)號轉(zhuan)(zhuan)化(hua)為轉(zhuan)(zhuan)矩和轉(zhuan)(zhuan)速(su)以驅動(dong)控(kong)制對象。轉(zhuan)(zhuan)子轉(zhuan)(zhuan)速(su)受輸入信(xin)號控(kong)制,并能快速(su)反應(ying),在自動(dong)控(kong)制系(xi)統(tong)中(zhong)(zhong)作執行(xing)(xing)元(yuan)件,且具有(you)(you)機電(dian)(dian)時間常(chang)數小、線(xian)性(xing)度(du)高(gao)。產生電(dian)(dian)磁干擾,對環境有(you)(you)要(yao)求。因此它可(ke)以用于對成本敏感的(de)(de)普通工業和民(min)用場(chang)合(he)。伺(si)服系(xi)統(tong)是(shi)(shi)使物體的(de)(de)位置、方位、狀態等(deng)輸出(chu)被控(kong)量能夠(gou)跟(gen)隨輸入目(mu)標(或給定(ding)值)的(de)(de)任(ren)意變(bian)化(hua)的(de)(de)自動(dong)控(kong)制系(xi)統(tong)。伺(si)服電(dian)(dian)動(dong)機與單機異步電(dian)(dian)動(dong)機相比,有(you)(you)起動(dong)轉(zhuan)(zhuan)矩大、運行(xing)(xing)范(fan)...

  • 202011-17
    避免壓力傳感器的誤差從這4個方面入手

    壓(ya)(ya)(ya)(ya)(ya)力(li)(li)傳(chuan)(chuan)(chuan)(chuan)(chuan)感(gan)(gan)(gan)(gan)器(qi)(PressureTransducer)是(shi)能(neng)感(gan)(gan)(gan)(gan)受壓(ya)(ya)(ya)(ya)(ya)力(li)(li)信(xin)號(hao)(hao),并(bing)能(neng)按照一定的(de)(de)(de)規律將壓(ya)(ya)(ya)(ya)(ya)力(li)(li)信(xin)號(hao)(hao)轉換成可用的(de)(de)(de)輸出(chu)的(de)(de)(de)電信(xin)號(hao)(hao)的(de)(de)(de)器(qi)件或裝置。壓(ya)(ya)(ya)(ya)(ya)力(li)(li)傳(chuan)(chuan)(chuan)(chuan)(chuan)感(gan)(gan)(gan)(gan)器(qi)通常由壓(ya)(ya)(ya)(ya)(ya)力(li)(li)敏感(gan)(gan)(gan)(gan)元(yuan)件和信(xin)號(hao)(hao)處理單元(yuan)組成。按不同的(de)(de)(de)測試壓(ya)(ya)(ya)(ya)(ya)力(li)(li)類型,壓(ya)(ya)(ya)(ya)(ya)力(li)(li)傳(chuan)(chuan)(chuan)(chuan)(chuan)感(gan)(gan)(gan)(gan)器(qi)可分為(wei)表壓(ya)(ya)(ya)(ya)(ya)傳(chuan)(chuan)(chuan)(chuan)(chuan)感(gan)(gan)(gan)(gan)器(qi)、差壓(ya)(ya)(ya)(ya)(ya)傳(chuan)(chuan)(chuan)(chuan)(chuan)感(gan)(gan)(gan)(gan)器(qi)和絕壓(ya)(ya)(ya)(ya)(ya)傳(chuan)(chuan)(chuan)(chuan)(chuan)感(gan)(gan)(gan)(gan)器(qi)。如何(he)避(bi)(bi)免壓(ya)(ya)(ya)(ya)(ya)力(li)(li)傳(chuan)(chuan)(chuan)(chuan)(chuan)感(gan)(gan)(gan)(gan)器(qi)的(de)(de)(de)誤(wu)差:在選擇壓(ya)(ya)(ya)(ya)(ya)力(li)(li)傳(chuan)(chuan)(chuan)(chuan)(chuan)感(gan)(gan)(gan)(gan)器(qi)的(de)(de)(de)時(shi)候(hou)我們要考慮他的(de)(de)(de)綜合精度(du),而壓(ya)(ya)(ya)(ya)(ya)力(li)(li)傳(chuan)(chuan)(chuan)(chuan)(chuan)感(gan)(gan)(gan)(gan)器(qi)的(de)(de)(de)精度(du)受哪些方面(mian)(mian)的(de)(de)(de)影(ying)響呢?其(qi)實造成傳(chuan)(chuan)(chuan)(chuan)(chuan)感(gan)(gan)(gan)(gan)器(qi)誤(wu)差的(de)(de)(de)因素有很多,下面(mian)(mian)我們注意(yi)說四(si)個無法避(bi)(bi)免的(de)(de)(de)誤(wu)差,這是(shi)傳(chuan)(chuan)(chuan)(chuan)(chuan)感(gan)(gan)(gan)(gan)器(qi)的(de)(de)(de)初始誤(wu)差。首先(xian)的(de)(de)(de)偏移量誤(wu)差:由于(yu)壓(ya)(ya)(ya)(ya)(ya)力(li)(li)...

  • 20209-26
    說說伺服電機控制系統的應用

    隨著(zhu)伺(si)服(fu)電(dian)(dian)機技術的(de)(de)(de)(de)發展,從高(gao)扭(niu)(niu)(niu)矩密度乃(nai)至(zhi)于(yu)(yu)高(gao)功(gong)率密度,使(shi)(shi)轉速的(de)(de)(de)(de)提(ti)升(sheng)高(gao)過3000rpm,由于(yu)(yu)轉速的(de)(de)(de)(de)提(ti)升(sheng),使(shi)(shi)得伺(si)服(fu)電(dian)(dian)機的(de)(de)(de)(de)功(gong)率密度大(da)幅提(ti)升(sheng)。哪些(xie)場(chang)合需(xu)要用(yong)(yong)到(dao)伺(si)服(fu)電(dian)(dian)機呢?這(zhe)是我(wo)們今天所要講(jiang)解(jie)的(de)(de)(de)(de)問題。伺(si)服(fu)電(dian)(dian)機控制(zhi)系統(tong)初用(yong)(yong)于(yu)(yu)船(chuan)舶的(de)(de)(de)(de)自動駕駛、火(huo)炮控制(zhi)和(he)指揮儀中(zhong),后(hou)來逐漸推廣到(dao)很多領域,特別是自動車(che)床、天線位置(zhi)控制(zhi)和(he)飛(fei)船(chuan)的(de)(de)(de)(de)制(zhi)導等。需(xu)提(ti)升(sheng)扭(niu)(niu)(niu)矩場(chang)合:輸(shu)(shu)出(chu)扭(niu)(niu)(niu)矩提(ti)升(sheng)的(de)(de)(de)(de)方式(shi),可能采用(yong)(yong)直接增大(da)伺(si)服(fu)電(dian)(dian)機的(de)(de)(de)(de)輸(shu)(shu)出(chu)扭(niu)(niu)(niu)矩方式(shi),但(dan)這(zhe)種方式(shi)不但(dan)必須(xu)使(shi)(shi)用(yong)(yong)昂貴大(da)功(gong)率的(de)(de)(de)(de)伺(si)服(fu)電(dian)(dian)機,馬達還(huan)要有(you)更(geng)強(qiang)壯(zhuang)的(de)(de)(de)(de)結構,扭(niu)(niu)(niu)矩的(de)(de)(de)(de)增大(da)正比(bi)于(yu)(yu)控制(zhi)...

  • 20209-24
    如何有效改善伺服電機的溫升問題?

    如何有效改(gai)(gai)善(shan)伺(si)服(fu)電機的(de)溫升(sheng)(sheng)問題(ti)(ti)?今天伺(si)服(fu)驅動(dong)器(qi)小編分享幾個小妙招(zhao),可依下(xia)列步驟作做檢查及確(que)認(ren)(ren):1.是否用于連續運轉的(de)場(chang)(chang)合(he)(he)(he)?伺(si)服(fu)電機的(de)特性(xing)并不適合(he)(he)(he)于連續運轉的(de)場(chang)(chang)合(he)(he)(he)下(xia)使用,在此場(chang)(chang)合(he)(he)(he)下(xia)使用時一定會有較(jiao)(jiao)高(gao)的(de)溫升(sheng)(sheng)產生。請(qing)重(zhong)新(xin)確(que)認(ren)(ren)機構動(dong)作需求條件(jian)并重(zhong)新(xin)評估使用的(de)電機。2.請(qing)確(que)認(ren)(ren)機構動(dong)作頻(pin)(pin)(pin)度(du)、周期?走停的(de)動(dong)作頻(pin)(pin)(pin)度(du)過(guo)高(gao)將(jiang)可能因脈沖輸入停止(zhi)的(de)時間過(guo)短而導(dao)致電流尚(shang)未(wei)下(xia)降(jiang)就又重(zhong)新(xin)激活(huo),故此時的(de)溫升(sheng)(sheng)一定會較(jiao)(jiao)高(gao)。建議您可將(jiang)動(dong)作頻(pin)(pin)(pin)度(du)降(jiang)低以改(gai)(gai)善(shan)溫升(sheng)(sheng)問題(ti)(ti)。3.將(jiang)RUN電流調小情況可否改(gai)(gai)善(shan)?在轉矩足夠的(de)情況下(xia)...

  • 20208-18
    如何解決差壓變送器差壓信號的傳送失真問題

    差(cha)(cha)壓(ya)(ya)信(xin)號(hao)(hao)傳(chuan)送(song)失(shi)(shi)真(zhen)(zhen)包括穩(wen)(wen)態(tai)值(zhi)(zhi)失(shi)(shi)真(zhen)(zhen)和動態(tai)失(shi)(shi)真(zhen)(zhen)。在(zai)(zai)穩(wen)(wen)定流條件(jian)下只(zhi)存(cun)在(zai)(zai)穩(wen)(wen)態(tai)值(zhi)(zhi)失(shi)(shi)真(zhen)(zhen),在(zai)(zai)脈動流條件(jian)下,既可(ke)能存(cun)在(zai)(zai)穩(wen)(wen)態(tai)值(zhi)(zhi)失(shi)(shi)真(zhen)(zhen)又(you)會有動態(tai)失(shi)(shi)真(zhen)(zhen)。差(cha)(cha)壓(ya)(ya)變(bian)送(song)器(qi)(qi)穩(wen)(wen)態(tai)值(zhi)(zhi)失(shi)(shi)真(zhen)(zhen)可(ke)能引(yin)(yin)起的部位(wei)和原因(yin)有導(dao)(dao)壓(ya)(ya)管(guan)引(yin)(yin)向不(bu)(bu)(bu)(bu)合(he)理(li),切(qie)斷(duan)閥設置不(bu)(bu)(bu)(bu)當,冷凝器(qi)(qi)高度(du)(du)不(bu)(bu)(bu)(bu)相等(deng),隔(ge)(ge)離液液位(wei)高度(du)(du)不(bu)(bu)(bu)(bu)相等(deng),正負壓(ya)(ya)引(yin)(yin)壓(ya)(ya)管(guan)坡度(du)(du)不(bu)(bu)(bu)(bu)合(he)理(li),管(guan)內介質密度(du)(du)不(bu)(bu)(bu)(bu)相等(deng),三(san)閥組積液等(deng)。(1)導(dao)(dao)壓(ya)(ya)管(guan)引(yin)(yin)向不(bu)(bu)(bu)(bu)合(he)理(li)和切(qie)斷(duan)閥設置不(bu)(bu)(bu)(bu)當引(yin)(yin)起的誤差(cha)(cha)(2)冷凝器(qi)(qi)高度(du)(du)不(bu)(bu)(bu)(bu)相等(deng)引(yin)(yin)起的誤差(cha)(cha)(3)隔(ge)(ge)離液液位(wei)高度(du)(du)不(bu)(bu)(bu)(bu)相等(deng)引(yin)(yin)起的誤差(cha)(cha)(4)引(yin)(yin)壓(ya)(ya)管(guan)線引(yin)(yin)起的傳(chuan)送(song)失(shi)(shi)真(zhen)(zhen)為了避免正負壓(ya)(ya)信(xin)號(hao)(hao)管(guan)內介質溫度(du)(du)不(bu)(bu)(bu)(bu)一致...

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