電(dian)壓表的使用方法 電(dian)壓表原(yuan)理是什么(me) 電(dian)壓表符號

電壓表的原理

電壓表指固定安裝在(zai)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)力(li)、電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)信、電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)子設備面板上(shang)使用(yong)(yong)的(de)(de)(de)(de)(de)儀表(biao)(biao)(biao)(biao)(biao)，用(yong)(yong)來(lai)測(ce)(ce)量(liang)(liang)(liang)交(jiao)(jiao)、直流(liu)(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)中的(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)。 1)常用(yong)(yong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)表(biao)(biao)(biao)(biao)(biao)——伏特表(biao)(biao)(biao)(biao)(biao) 符(fu)號：-V- 2)大(da)部分(fen)(fen)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)表(biao)(biao)(biao)(biao)(biao)都分(fen)(fen)為(wei)兩個(ge)(ge)(ge)量(liang)(liang)(liang)程(cheng)(cheng)。(0—3V)(0—15V) 3)正(zheng)(zheng)確使用(yong)(yong)：機械調零(ling)(把指針調到零(ling)刻度)并(bing)(bing)聯(lian)(電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)表(biao)(biao)(biao)(biao)(biao)內阻(zu)(zu)很(hen)大(da)，串聯(lian)在(zai)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)中會造成斷路(lu)。)正(zheng)(zheng)進負(fu)出(使電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)從正(zheng)(zheng)極接(jie)入(ru)流(liu)(liu)(liu)(liu)進，從負(fu)極接(jie)入(ru)流(liu)(liu)(liu)(liu)出。)量(liang)(liang)(liang)程(cheng)(cheng)(被測(ce)(ce)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)不能(neng)超過(guo)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)表(biao)(biao)(biao)(biao)(biao)的(de)(de)(de)(de)(de)量(liang)(liang)(liang)程(cheng)(cheng)，注意：如(ru)果不能(neng)估計電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)上(shang)的(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)，先(xian)用(yong)(yong)大(da)的(de)(de)(de)(de)(de)量(liang)(liang)(liang)程(cheng)(cheng)試觸，粗略測(ce)(ce)得電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)后，再用(yong)(yong)適合的(de)(de)(de)(de)(de)量(liang)(liang)(liang)程(cheng)(cheng)。這樣可以(yi)防(fang)止電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)過(guo)大(da)而打彎指針。) 4)直流(liu)(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)表(biao)(biao)(biao)(biao)(biao)的(de)(de)(de)(de)(de)符(fu)號要在(zai)V下加一(yi)(yi)個(ge)(ge)(ge)_，交(jiao)(jiao)流(liu)(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)表(biao)(biao)(biao)(biao)(biao)的(de)(de)(de)(de)(de)符(fu)號要再V下加一(yi)(yi)個(ge)(ge)(ge)波浪線“~” 電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)表(biao)(biao)(biao)(biao)(biao)有三個(ge)(ge)(ge)接(jie)線柱，一(yi)(yi)個(ge)(ge)(ge)負(fu)接(jie)線柱，兩個(ge)(ge)(ge)正(zheng)(zheng)接(jie)線柱 例如(ru)學(xue)生用(yong)(yong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)表(biao)(biao)(biao)(biao)(biao)一(yi)(yi)般正(zheng)(zheng)接(jie)線柱有3V，15V兩個(ge)(ge)(ge)，測(ce)(ce)量(liang)(liang)(liang)時根(gen)據電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)大(da)小(xiao)(xiao)選擇(ze)量(liang)(liang)(liang)程(cheng)(cheng)為(wei)“15V”時,刻度盤上(shang)的(de)(de)(de)(de)(de)每(mei)(mei)個(ge)(ge)(ge)大(da)格(ge)表(biao)(biao)(biao)(biao)(biao)示5Ⅴ，每(mei)(mei)個(ge)(ge)(ge)小(xiao)(xiao)格(ge)表(biao)(biao)(biao)(biao)(biao)示0.5V(即最小(xiao)(xiao)分(fen)(fen)度值(zhi)是0.5Ⅴ);量(liang)(liang)(liang)程(cheng)(cheng)為(wei)“3Ⅴ”時,刻度盤上(shang)的(de)(de)(de)(de)(de)每(mei)(mei)個(ge)(ge)(ge)大(da)格(ge)表(biao)(biao)(biao)(biao)(biao)示lV，每(mei)(mei)個(ge)(ge)(ge)小(xiao)(xiao)格(ge)表(biao)(biao)(biao)(biao)(biao)示0.lV(即最小(xiao)(xiao)分(fen)(fen)度值(zhi)是0.lⅤ)。 我們可用(yong)(yong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)表(biao)(biao)(biao)(biao)(biao)來(lai)測(ce)(ce)量(liang)(liang)(liang)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)的(de)(de)(de)(de)(de)大(da)小(xiao)(xiao).電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)表(biao)(biao)(biao)(biao)(biao)的(de)(de)(de)(de)(de)符(fu)號是(A). 交(jiao)(jiao)流(liu)(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)表(biao)(biao)(biao)(biao)(biao)不分(fen)(fen)正(zheng)(zheng)負(fu)極，正(zheng)(zheng)確選擇(ze)量(liang)(liang)(liang)程(cheng)(cheng)，直接(jie)把電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)表(biao)(biao)(biao)(biao)(biao)并(bing)(bing)聯(lian)在(zai)被測(ce)(ce)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)的(de)(de)(de)(de)(de)兩端(duan)。 交(jiao)(jiao)流(liu)(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)表(biao)(biao)(biao)(biao)(biao)測(ce)(ce)的(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)是交(jiao)(jiao)流(liu)(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)的(de)(de)(de)(de)(de)有效值(zhi)。 串，并(bing)(bing)聯(lian)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)的(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)特點 串聯(lian)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)中，總(zong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)源兩端(duan)的(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya))等于各電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)兩端(duan)的(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)之和。 U=U1+U2 并(bing)(bing)聯(lian)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)中，各支路(lu)兩端(duan)的(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)相等，且等于電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)的(de)(de)(de)(de)(de)總(zong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)源兩端(duan)的(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya))。 U=U1=U2

電壓表的原理是什么

在電壓表內，有一(yi)個(ge)磁(ci)(ci)鐵(tie)和(he)(he)一(yi)個(ge)導線線圈，通過(guo)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)后，會使線圈產生(sheng)磁(ci)(ci)場(chang)，這(zhe)樣線圈通電(dian)(dian)(dian)(dian)(dian)(dian)(dian)后在磁(ci)(ci)鐵(tie)的(de)(de)作(zuo)用下(xia)會旋轉(zhuan)，這(zhe)就(jiu)是電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)表(biao)(biao)(biao)、電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)表(biao)(biao)(biao)的(de)(de)表(biao)(biao)(biao)頭(tou)部分(fen)(fen)(fen)。 這(zhe)個(ge)表(biao)(biao)(biao)頭(tou)所能(neng)通過(guo)的(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)很小，兩(liang)端(duan)所能(neng)承受的(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)也很小(肯定遠小于1V，可能(neng)只有零(ling)點零(ling)幾(ji)伏(fu)甚至更(geng)小)，為(wei)了(le)(le)能(neng)測(ce)(ce)量(liang)(liang)我們實(shi)際電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)中的(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)，我們需(xu)要給(gei)這(zhe)個(ge)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)表(biao)(biao)(biao)串聯一(yi)個(ge)比較(jiao)大的(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)，做成(cheng)(cheng)(cheng)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)表(biao)(biao)(biao)。這(zhe)樣，即(ji)(ji)使兩(liang)端(duan)加(jia)上比較(jiao)大的(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)，可是大部分(fen)(fen)(fen)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)都作(zuo)用在我們加(jia)的(de)(de)那個(ge)大電(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)上了(le)(le)，表(biao)(biao)(biao)頭(tou)上的(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)就(jiu)會很小了(le)(le)。 可見，電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)表(biao)(biao)(biao)是一(yi)種(zhong)內部電(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)很大的(de)(de)儀(yi)器，一(yi)般應該大于幾(ji)千歐。 電(dian)(dian)(dian)(dian)(dian)(dian)(dian)子電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)表(biao)(biao)(biao)的(de)(de)分(fen)(fen)(fen)類(lei)(lei)(lei) 電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)表(biao)(biao)(biao)按其工(gong)作(zuo)原理和(he)(he)讀(du)數方式(shi)(shi)分(fen)(fen)(fen)為(wei)模擬式(shi)(shi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)表(biao)(biao)(biao)和(he)(he)數字式(shi)(shi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)表(biao)(biao)(biao)兩(liang)大類(lei)(lei)(lei)。 (1)模擬式(shi)(shi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)表(biao)(biao)(biao) 模擬式(shi)(shi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)表(biao)(biao)(biao)又(you)叫(jiao)指(zhi)(zhi)針式(shi)(shi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)表(biao)(biao)(biao)，一(yi)般都采用磁(ci)(ci)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)式(shi)(shi)直(zhi)(zhi)流(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)表(biao)(biao)(biao)頭(tou)作(zuo)為(wei)被測(ce)(ce)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)的(de)(de)指(zhi)(zhi)示器。測(ce)(ce)量(liang)(liang)直(zhi)(zhi)流(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)時，可直(zhi)(zhi)接或經放(fang)大或經衰減后變成(cheng)(cheng)(cheng)一(yi)定量(liang)(liang)的(de)(de)直(zhi)(zhi)流(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)驅動直(zhi)(zhi)流(liu)(liu)(liu)表(biao)(biao)(biao)頭(tou)的(de)(de)指(zhi)(zhi)針偏轉(zhuan)指(zhi)(zhi)示。測(ce)(ce)量(liang)(liang)交流(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)時，必(bi)需(xu)經過(guo)交流(liu)(liu)(liu)-直(zhi)(zhi)流(liu)(liu)(liu)變換(huan)器即(ji)(ji)檢(jian)波器，將被測(ce)(ce)交流(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)先轉(zhuan)換(huan)成(cheng)(cheng)(cheng)與之(zhi)成(cheng)(cheng)(cheng)比例的(de)(de)直(zhi)(zhi)流(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)后，再進行直(zhi)(zhi)流(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)的(de)(de)測(ce)(ce)量(liang)(liang)。模擬式(shi)(shi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)表(biao)(biao)(biao)按不同得方式(shi)(shi)又(you)分(fen)(fen)(fen)為(wei)如下(xia)幾(ji)種(zhong)類(lei)(lei)(lei)型(xing)： ①按工(gong)作(zuo)頻(pin)(pin)率分(fen)(fen)(fen)類(lei)(lei)(lei)：分(fen)(fen)(fen)為(wei)超(chao)低頻(pin)(pin)(1kHz以(yi)下(xia))、低頻(pin)(pin)(1MHz以(yi)下(xia))、視頻(pin)(pin)(30MHz以(yi)下(xia))、高頻(pin)(pin)或射頻(pin)(pin)(300MHz以(yi)下(xia))、超(chao)高頻(pin)(pin)(300MHz以(yi)上)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)表(biao)(biao)(biao)。 ②按測(ce)(ce)量(liang)(liang)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)量(liang)(liang)級(ji)(ji)分(fen)(fen)(fen)類(lei)(lei)(lei)：分(fen)(fen)(fen)為(wei)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)表(biao)(biao)(biao)(基本量(liang)(liang)程為(wei)V量(liang)(liang)級(ji)(ji))和(he)(he)毫(hao)伏(fu)表(biao)(biao)(biao)(基本量(liang)(liang)程為(wei)mV量(liang)(liang)級(ji)(ji))。 ③按檢(jian)波方式(shi)(shi)分(fen)(fen)(fen)類(lei)(lei)(lei)：分(fen)(fen)(fen)為(wei)均(jun)值(zhi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)表(biao)(biao)(biao)、有效值(zhi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)表(biao)(biao)(biao)和(he)(he)峰值(zhi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)表(biao)(biao)(biao)。 ④按電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)組成(cheng)(cheng)(cheng)形式(shi)(shi)分(fen)(fen)(fen)類(lei)(lei)(lei)：分(fen)(fen)(fen)為(wei)檢(jian)波-放(fang)大式(shi)(shi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)表(biao)(biao)(biao)、放(fang)大-檢(jian)波式(shi)(shi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)表(biao)(biao)(biao)、外(wai)差式(shi)(shi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)

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