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Flli Giacomello液位開關的工作原理
點擊次數:133 更新時間:2023-12-01

Flli Giacomello液位開關的(de)工作原理

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液位開關的工作原理

1、液(ye)(ye)位開(kai)(kai)關也叫水(shui)位開(kai)(kai)關、液(ye)(ye)位傳(chuan)感器(qi),其(qi)是用來控制(zhi)液(ye)(ye)位的(de)開(kai)(kai)關,從形式上主要(yao)分為接(jie)(jie)觸(chu)式和非接(jie)(jie)觸(chu)式,常用的(de)非接(jie)(jie)觸(chu)式開(kai)(kai)關有電(dian)容式液(ye)(ye)位開(kai)(kai)關,接(jie)(jie)觸(chu)式的(de)浮球(qiu)式液(ye)(ye)位開(kai)(kai)關應用廣泛。

2、液位(wei)(wei)開關中(zhong)的(de)電(dian)容式液位(wei)(wei)開關是采(cai)用(yong)偵測液位(wei)(wei)變(bian)化時所引起的(de)微小(xiao)電(dian)容量通常為PF差值變(bian)化,并由專(zhuan)用(yong)的(de)ADA電(dian)容檢(jian)測芯片進行信號處(chu)理,可以輸(shu)出多種信號通訊協議,如:IO,BCD,PWM,UART,IIC等,從而檢(jian)測出水位(wei)(wei),并輸(shu)出信號到輸(shu)出端。

3、液(ye)位(wei)開(kai)關(guan)(guan)(guan)中的浮(fu)球液(ye)位(wei)開(kai)關(guan)(guan)(guan)是利(li)用微(wei)動(dong)(dong)開(kai)關(guan)(guan)(guan)做接點輸出,當水(shui)平(ping)面以上揚線角度(du)超過28°時,浮(fu)球液(ye)位(wei)開(kai)關(guan)(guan)(guan)內部的鋼珠會滾動(dong)(dong)壓到微(wei)動(dong)(dong)開(kai)關(guan)(guan)(guan)或(huo)脫離(li)微(wei)動(dong)(dong)開(kai)關(guan)(guan)(guan),使液(ye)位(wei)開(kai)關(guan)(guan)(guan)ON或(huo)OFF的接點信(xin)號(hao)輸出。

4、還有(you)一(yi)種(zhong)浮(fu)(fu)球(qiu)液位開(kai)關,是利用水(shui)銀開(kai)關做接點輸(shu)出,當液位上升接觸浮(fu)(fu)球(qiu)時,浮(fu)(fu)球(qiu)以(yi)重錘為中心(xin)隨水(shui)位上升角(jiao)度變(bian)化(hua),當水(shui)面(mian)以(yi)上揚線角(jiao)度超過(guo)10°時,液位開(kai)關便會有(you)ON或OFF的接點信號輸(shu)出。

液位開關種類

液位開關種類

1、浮球液(ye)位開關(guan),利用浮球液(ye)位開關(guan)的磁性浮子隨液(ye)位上升或(huo)下降,讓(rang)傳感器檢測管內設定位置的干簧(huang)管芯片(pian)動作,發(fa)出接點開關(guan)轉換(huan)信號,由于(yu)其(qi)結構簡單、價格不高,所以在市面上應用較(jiao)為廣泛,主要是民(min)用比較(jiao)多。

2、電容式液位開關,探頭(tou)接(jie)液后檢(jian)測(ce)電容值變化輸出接(jie)點(dian)信(xin)號,在輕微粘稠性介質測(ce)量上有(you)一定優勢。

3、電(dian)極(ji)式液(ye)(ye)位開(kai)關,其是(shi)利用液(ye)(ye)體的(de)導(dao)電(dian)性來檢(jian)測液(ye)(ye)位高(gao)低,被測介(jie)質只要觸及極(ji)棒,就會導(dao)電(dian)因而檢(jian)出(chu)信號,經(jing)控制(zhi)器的(de)信號放大(da)后,再輸(shu)出(chu)接點信號,達到對(dui)液(ye)(ye)位的(de)控制(zhi)。

4、光(guang)電(dian)液位開(kai)關,這(zhe)種(zhong)(zhong)開(kai)關使(shi)用(yong)紅外(wai)(wai)線(xian)探測,利用(yong)光(guang)線(xian)的折射(she)及(ji)反(fan)射(she)原(yuan)理,光(guang)線(xian)在兩(liang)種(zhong)(zhong)不同介質的分(fen)(fen)界面(mian)(mian)就(jiu)會產生反(fan)射(she)或折射(she)現象,當被測液體(ti)(ti)(ti)處于高位時(shi),被測液體(ti)(ti)(ti)與(yu)光(guang)電(dian)開(kai)關形成一種(zhong)(zhong)分(fen)(fen)界面(mian)(mian),被測液體(ti)(ti)(ti)處于低位時(shi),空氣(qi)與(yu)光(guang)電(dian)開(kai)關形成另外(wai)(wai)的分(fen)(fen)界面(mian)(mian),這(zhe)兩(liang)種(zhong)(zhong)分(fen)(fen)界面(mian)(mian)讓光(guang)電(dian)開(kai)關內部光(guang)接(jie)收(shou)晶體(ti)(ti)(ti)所接(jie)收(shou)的的反(fan)射(she)光(guang)強度不同。

液位(wei)(wei)開(kai)(kai)(kai)(kai)關,也稱水位(wei)(wei)開(kai)(kai)(kai)(kai)關,液位(wei)(wei)傳感(gan)器,顧名思義,就(jiu)是用來(lai)控制液位(wei)(wei)的(de)開(kai)(kai)(kai)(kai)關。從形式(shi)(shi)上主要分為接觸(chu)式(shi)(shi)和非接觸(chu)式(shi)(shi)。   常用的(de)非接觸(chu)式(shi)(shi)開(kai)(kai)(kai)(kai)關有電(dian)容(rong)式(shi)(shi)液位(wei)(wei)開(kai)(kai)(kai)(kai)關,接觸(chu)式(shi)(shi)的(de)浮球式(shi)(shi)液位(wei)(wei)開(kai)(kai)(kai)(kai)關應用廣泛。電(dian)極式(shi)(shi)液位(wei)(wei)開(kai)(kai)(kai)(kai)關,電(dian)子式(shi)(shi)液位(wei)(wei)開(kai)(kai)(kai)(kai)關,電(dian)容(rong)式(shi)(shi)液位(wei)(wei)開(kai)(kai)(kai)(kai)關也可以采用接觸(chu)式(shi)(shi)方法實現.

液位開關及其原理

電容式液位開關:

電(dian)(dian)容(rong)式(shi)液位(wei)(wei)(wei)(wei)開關(guan)是(shi)(shi)采用(yong)(yong)偵(zhen)測(ce)(ce)液位(wei)(wei)(wei)(wei)變化(hua)時所(suo)引起的(de)(de)(de)(de)微(wei)小(xiao)電(dian)(dian)容(rong)量(通(tong)常為PF)差值變化(hua),并由專用(yong)(yong)的(de)(de)(de)(de)ADA電(dian)(dian)容(rong)檢(jian)(jian)(jian)(jian)(jian)測(ce)(ce)芯(xin)片進行(xing)信(xin)號(hao)處理(可以輸出(chu)(chu)多(duo)種信(xin)號(hao)通(tong)訊(xun)協議,如(ru):IO,BCD, PWM,UART,IIC…),從(cong)而檢(jian)(jian)(jian)(jian)(jian)測(ce)(ce)出(chu)(chu)水位(wei)(wei)(wei)(wei),并輸出(chu)(chu)信(xin)號(hao)到輸出(chu)(chu)端。   電(dian)(dian)容(rong)式(shi)液位(wei)(wei)(wei)(wei)檢(jian)(jian)(jian)(jian)(jian)測(ce)(ce)的(de)(de)(de)(de)勢在于可以隔著(zhu)任何(he)介質檢(jian)(jian)(jian)(jian)(jian)測(ce)(ce)到容(rong)器內(nei)的(de)(de)(de)(de)水位(wei)(wei)(wei)(wei)或液體(ti)的(de)(de)(de)(de)變化(hua),大大擴展了實(shi)(shi)際應(ying)用(yong)(yong),同(tong)時有(you)效避免了傳統液位(wei)(wei)(wei)(wei)檢(jian)(jian)(jian)(jian)(jian)測(ce)(ce)方式(shi)的(de)(de)(de)(de)穩定性(xing)、可靠(kao)性(xing)差的(de)(de)(de)(de)弊(bi)端。   在某些特殊領域(yu)不能檢(jian)(jian)(jian)(jian)(jian)測(ce)(ce)的(de)(de)(de)(de)問題,使用(yong)(yong)內(nei)置MCU雙核處理的(de)(de)(de)(de)ADA電(dian)(dian)容(rong)檢(jian)(jian)(jian)(jian)(jian)測(ce)(ce)芯(xin)片的(de)(de)(de)(de)電(dian)(dian)容(rong)式(shi)液位(wei)(wei)(wei)(wei)開關(guan),就可以實(shi)(shi)現很多(duo)特殊控制功能,甚至實(shi)(shi)現更多(duo)的(de)(de)(de)(de)集(ji)成化(hua)、智能化(hua)水位(wei)(wei)(wei)(wei)檢(jian)(jian)(jian)(jian)(jian)測(ce)(ce)功能,諸如(ru)太陽能熱水器、咖啡壺等應(ying)用(yong)(yong)中(zhong)(zhong)掉電(dian)(dian)后(hou)的(de)(de)(de)(de)水位(wei)(wei)(wei)(wei)變化(hua)也能可靠(kao)檢(jian)(jian)(jian)(jian)(jian)測(ce)(ce)當前水位(wei)(wei)(wei)(wei),電(dian)(dian)容(rong)式(shi)液位(wei)(wei)(wei)(wei)檢(jian)(jian)(jian)(jian)(jian)測(ce)(ce)是(shi)(shi)目前液位(wei)(wei)(wei)(wei)開關(guan)中(zhong)(zhong)最有(you)優勢的(de)(de)(de)(de)檢(jian)(jian)(jian)(jian)(jian)測(ce)(ce)方法。

電纜浮球液位開關:

浮球(qiu)(qiu)(qiu)液位(wei)(wei)開關(guan)(guan)是利(li)用(yong)微(wei)動(dong)(dong)開關(guan)(guan)做接(jie)點(dian)輸(shu)(shu)出。當水平面以上揚(yang)線角度超(chao)過28°時(shi),浮球(qiu)(qiu)(qiu)液位(wei)(wei)開關(guan)(guan)內部的(de)鋼(gang)珠會滾動(dong)(dong)壓到微(wei)動(dong)(dong)開關(guan)(guan)或(huo)脫(tuo)離微(wei)動(dong)(dong)開關(guan)(guan),使液位(wei)(wei)開關(guan)(guan)ON或(huo)OFF的(de)接(jie)點(dian)信號輸(shu)(shu)出。   也有(you)另一類浮球(qiu)(qiu)(qiu)液位(wei)(wei)開關(guan)(guan),利(li)用(yong)水銀開關(guan)(guan)做接(jie)點(dian)輸(shu)(shu)出,當液位(wei)(wei)上升(sheng)接(jie)觸浮球(qiu)(qiu)(qiu)時(shi),浮球(qiu)(qiu)(qiu)以重(zhong)錘(chui)為(wei)中心隨水位(wei)(wei)上升(sheng)角度變化。當水面以上揚(yang)線角度超(chao)過10°時(shi),液位(wei)(wei)開關(guan)(guan)便會有(you)ON或(huo)OFF的(de)接(jie)點(dian)信號輸(shu)(shu)出。

電子式液位開關:

電(dian)(dian)(dian)子(zi)式(shi)液位(wei)開關通(tong)過(guo)內置(zhi)電(dian)(dian)(dian)子(zi)探頭(tou)對水(shui)(shui)位(wei)進行檢測(ce),再由芯(xin)片(pian)對檢測(ce)到的(de)信號(hao)進行處理,當(dang)(dang)判斷到有水(shui)(shui)時,芯(xin)片(pian)輸出高電(dian)(dian)(dian)平24V或(huo)(huo)5V等(PNP型或(huo)(huo)NPN型均可),當(dang)(dang)判斷到無水(shui)(shui)時,芯(xin)片(pian)輸出0V。高低(di)電(dian)(dian)(dian)平的(de)信號(hao)通(tong)過(guo)PLC或(huo)(huo)其它控制電(dian)(dian)(dian)路來讀取,并(bing)驅動水(shui)(shui)泵等用電(dian)(dian)(dian)器(qi)工作。

壓力式液位開關:

全自動洗衣機中一般采用(yong)的(de)液位(wei)(wei)開關(guan)就是壓(ya)力(li)式水(shui)(shui)位(wei)(wei)開關(guan),它裝在 洗衣機的(de)壓(ya)力(li)式水(shui)(shui)位(wei)(wei)開關(guan)

洗(xi)滌缸的(de)(de)上部,它有(you)一(yi)根下(xia)端開(kai)口的(de)(de)氣(qi)管通到缸底,進(jin)水(shui)時管里的(de)(de)空氣(qi)被封閉在里面出(chu)不來,就形成(cheng)比外界稍高(gao)(gao)的(de)(de)壓(ya)力。水(shui)位越(yue)高(gao)(gao)壓(ya)力越(yue)高(gao)(gao),這樣根據壓(ya)力就可間接(jie)測(ce)(ce)知水(shui)位。而壓(ya)力的(de)(de)測(ce)(ce)量仍然用(yong)彈性元(yuan)件(jian),靠(kao)元(yuan)件(jian)的(de)(de)變形帶動觸點完(wan)成(cheng)通斷動作。這種(zhong)測(ce)(ce)液位的(de)(de)方(fang)法叫做“靜(jing)壓(ya)法",在工業(ye)中(zhong)用(yong)的(de)(de)不少。

浮球式液位開關:

浮球式液位開(kai)關(guan)最大的(de)(de)特點是有一個帶桿的(de)(de)浮球,隨(sui)(sui)著液位的(de)(de)變化,浮球聯動(dong)的(de)(de)桿隨(sui)(sui)著變化,從而控制開(kai)關(guan)的(de)(de).

水處理中的液(ye)位(wei)控制:

在(zai)水(shui)(shui)處(chu)理中(zhong),液位控制(zhi)往往關(guan)(guan)系(xi)到整個工藝的(de)(de)安全性、經濟性和可行性。   在(zai)一(yi)個水(shui)(shui)處(chu)理的(de)(de)工藝流程中(zhong),一(yi)般都有原水(shui)(shui),中(zhong)間水(shui)(shui)箱(xiang)(xiang),產(chan)水(shui)(shui)箱(xiang)(xiang),反洗(xi)水(shui)(shui)箱(xiang)(xiang),甚至廢液箱(xiang)(xiang)等(deng)。體積有大(da)有小,一(yi)般地,產(chan)水(shui)(shui)箱(xiang)(xiang)、原水(shui)(shui)箱(xiang)(xiang)等(deng)都會(hui)比較大(da),尤其在(zai)大(da)型(xing)的(de)(de)生(sheng)產(chan)線,這(zhe)時在(zai)水(shui)(shui)箱(xiang)(xiang)中(zhong)往往需(xu)要(yao)使用(yong)多(duo)個液位開(kai)關(guan)(guan)控制(zhi)多(duo)個液位。每個液位對(dui)應不同的(de)(de)動作,常(chang)見的(de)(de)有泵的(de)(de)啟停,產(chan)水(shui)(shui)的(de)(de)啟停等(deng)。而有些水(shui)(shui)箱(xiang)(xiang)雖然很大(da),但是并不一(yi)定需(xu)要(yao)多(duo)個液位開(kai)關(guan)(guan)。

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