電壓(ya)表(biao)(biao)的使用(yong)方法(fa) 電壓(ya)表(biao)(biao)原(yuan)理(li)是(shi)什(shen)么(me) 電壓(ya)表(biao)(biao)符號

電壓表的原理

電壓表指固(gu)定安裝在(zai)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)力、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)子設備面板上使用的(de)(de)(de)儀表(biao)(biao)(biao)(biao)，用來測(ce)量(liang)交(jiao)、直流(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)中(zhong)(zhong)的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)。 1)常(chang)用電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)表(biao)(biao)(biao)(biao)——伏特(te)表(biao)(biao)(biao)(biao) 符號：-V- 2)大(da)部分(fen)(fen)(fen)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)表(biao)(biao)(biao)(biao)都分(fen)(fen)(fen)為兩(liang)個(ge)(ge)(ge)量(liang)程(cheng)(cheng)(cheng)(cheng)。(0—3V)(0—15V) 3)正(zheng)確(que)使用：機械調零(ling)(把指針(zhen)調到(dao)零(ling)刻度(du))并聯(lian)(電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)表(biao)(biao)(biao)(biao)內(nei)阻很(hen)大(da)，串聯(lian)在(zai)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)中(zhong)(zhong)會(hui)造成斷路(lu)。)正(zheng)進(jin)負(fu)(fu)出(使電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)從(cong)正(zheng)極接(jie)入(ru)流(liu)(liu)(liu)進(jin)，從(cong)負(fu)(fu)極接(jie)入(ru)流(liu)(liu)(liu)出。)量(liang)程(cheng)(cheng)(cheng)(cheng)(被(bei)測(ce)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)不能超過電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)表(biao)(biao)(biao)(biao)的(de)(de)(de)量(liang)程(cheng)(cheng)(cheng)(cheng)，注意：如果(guo)不能估計(ji)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)上的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)，先用大(da)的(de)(de)(de)量(liang)程(cheng)(cheng)(cheng)(cheng)試觸(chu)，粗(cu)略測(ce)得電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)后，再(zai)用適合(he)的(de)(de)(de)量(liang)程(cheng)(cheng)(cheng)(cheng)。這樣可(ke)以防止電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)過大(da)而打(da)彎指針(zhen)。) 4)直流(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)表(biao)(biao)(biao)(biao)的(de)(de)(de)符號要在(zai)V下加一(yi)個(ge)(ge)(ge)_，交(jiao)流(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)表(biao)(biao)(biao)(biao)的(de)(de)(de)符號要再(zai)V下加一(yi)個(ge)(ge)(ge)波浪線(xian)“~” 電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)表(biao)(biao)(biao)(biao)有三個(ge)(ge)(ge)接(jie)線(xian)柱，一(yi)個(ge)(ge)(ge)負(fu)(fu)接(jie)線(xian)柱，兩(liang)個(ge)(ge)(ge)正(zheng)接(jie)線(xian)柱 例(li)如學生(sheng)用電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)表(biao)(biao)(biao)(biao)一(yi)般正(zheng)接(jie)線(xian)柱有3V，15V兩(liang)個(ge)(ge)(ge)，測(ce)量(liang)時(shi)根據(ju)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)大(da)小(xiao)選(xuan)擇量(liang)程(cheng)(cheng)(cheng)(cheng)為“15V”時(shi),刻度(du)盤(pan)上的(de)(de)(de)每(mei)(mei)個(ge)(ge)(ge)大(da)格表(biao)(biao)(biao)(biao)示5Ⅴ，每(mei)(mei)個(ge)(ge)(ge)小(xiao)格表(biao)(biao)(biao)(biao)示0.5V(即最(zui)小(xiao)分(fen)(fen)(fen)度(du)值(zhi)是(shi)0.5Ⅴ);量(liang)程(cheng)(cheng)(cheng)(cheng)為“3Ⅴ”時(shi),刻度(du)盤(pan)上的(de)(de)(de)每(mei)(mei)個(ge)(ge)(ge)大(da)格表(biao)(biao)(biao)(biao)示lV，每(mei)(mei)個(ge)(ge)(ge)小(xiao)格表(biao)(biao)(biao)(biao)示0.lV(即最(zui)小(xiao)分(fen)(fen)(fen)度(du)值(zhi)是(shi)0.lⅤ)。 我們(men)可(ke)用電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)表(biao)(biao)(biao)(biao)來測(ce)量(liang)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)的(de)(de)(de)大(da)小(xiao).電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)表(biao)(biao)(biao)(biao)的(de)(de)(de)符號是(shi)(A). 交(jiao)流(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)表(biao)(biao)(biao)(biao)不分(fen)(fen)(fen)正(zheng)負(fu)(fu)極，正(zheng)確(que)選(xuan)擇量(liang)程(cheng)(cheng)(cheng)(cheng)，直接(jie)把電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)表(biao)(biao)(biao)(biao)并聯(lian)在(zai)被(bei)測(ce)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)的(de)(de)(de)兩(liang)端(duan)。 交(jiao)流(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)表(biao)(biao)(biao)(biao)測(ce)的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)是(shi)交(jiao)流(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)的(de)(de)(de)有效值(zhi)。 串，并聯(lian)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)特(te)點 串聯(lian)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)中(zhong)(zhong)，總(zong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)源兩(liang)端(duan)的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya))等(deng)于各電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻兩(liang)端(duan)的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)之和(he)。 U=U1+U2 并聯(lian)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)中(zhong)(zhong)，各支路(lu)兩(liang)端(duan)的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)相(xiang)等(deng)，且等(deng)于電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)的(de)(de)(de)總(zong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)源兩(liang)端(duan)的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya))。 U=U1=U2

電壓表的原理是什么

在電壓表內(nei)，有(you)一個(ge)磁(ci)(ci)鐵和(he)(he)一個(ge)導線線圈(quan)，通過(guo)(guo)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)(liu)后(hou)，會(hui)使線圈(quan)產生磁(ci)(ci)場(chang)，這(zhe)樣線圈(quan)通電(dian)(dian)(dian)(dian)(dian)(dian)后(hou)在磁(ci)(ci)鐵的(de)(de)作(zuo)(zuo)用下(xia)(xia)會(hui)旋轉(zhuan)(zhuan)，這(zhe)就是電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)(liu)表(biao)(biao)(biao)(biao)(biao)(biao)、電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)表(biao)(biao)(biao)(biao)(biao)(biao)的(de)(de)表(biao)(biao)(biao)(biao)(biao)(biao)頭部(bu)(bu)分(fen)(fen)。 這(zhe)個(ge)表(biao)(biao)(biao)(biao)(biao)(biao)頭所(suo)能通過(guo)(guo)的(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)(liu)很(hen)小(xiao)，兩端所(suo)能承受的(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)也很(hen)小(xiao)(肯定遠小(xiao)于1V，可能只有(you)零點零幾(ji)伏甚至更(geng)小(xiao))，為了能測(ce)量(liang)(liang)(liang)(liang)(liang)我們實際(ji)電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)中的(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)，我們需(xu)要給(gei)這(zhe)個(ge)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)表(biao)(biao)(biao)(biao)(biao)(biao)串聯一個(ge)比較大(da)(da)的(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)阻，做成(cheng)(cheng)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)表(biao)(biao)(biao)(biao)(biao)(biao)。這(zhe)樣，即(ji)使兩端加上比較大(da)(da)的(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)，可是大(da)(da)部(bu)(bu)分(fen)(fen)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)都作(zuo)(zuo)用在我們加的(de)(de)那個(ge)大(da)(da)電(dian)(dian)(dian)(dian)(dian)(dian)阻上了，表(biao)(biao)(biao)(biao)(biao)(biao)頭上的(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)就會(hui)很(hen)小(xiao)了。 可見，電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)表(biao)(biao)(biao)(biao)(biao)(biao)是一種(zhong)內(nei)部(bu)(bu)電(dian)(dian)(dian)(dian)(dian)(dian)阻很(hen)大(da)(da)的(de)(de)儀器(qi)，一般(ban)應該(gai)大(da)(da)于幾(ji)千歐。 電(dian)(dian)(dian)(dian)(dian)(dian)子電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)表(biao)(biao)(biao)(biao)(biao)(biao)的(de)(de)分(fen)(fen)類(lei)(lei) 電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)表(biao)(biao)(biao)(biao)(biao)(biao)按(an)其工作(zuo)(zuo)原理和(he)(he)讀數方(fang)式(shi)(shi)(shi)(shi)(shi)分(fen)(fen)為模擬(ni)式(shi)(shi)(shi)(shi)(shi)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)表(biao)(biao)(biao)(biao)(biao)(biao)和(he)(he)數字式(shi)(shi)(shi)(shi)(shi)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)表(biao)(biao)(biao)(biao)(biao)(biao)兩大(da)(da)類(lei)(lei)。 (1)模擬(ni)式(shi)(shi)(shi)(shi)(shi)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)表(biao)(biao)(biao)(biao)(biao)(biao) 模擬(ni)式(shi)(shi)(shi)(shi)(shi)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)表(biao)(biao)(biao)(biao)(biao)(biao)又叫(jiao)指(zhi)針式(shi)(shi)(shi)(shi)(shi)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)表(biao)(biao)(biao)(biao)(biao)(biao)，一般(ban)都采用磁(ci)(ci)電(dian)(dian)(dian)(dian)(dian)(dian)式(shi)(shi)(shi)(shi)(shi)直(zhi)流(liu)(liu)(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)(liu)表(biao)(biao)(biao)(biao)(biao)(biao)頭作(zuo)(zuo)為被測(ce)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)的(de)(de)指(zhi)示器(qi)。測(ce)量(liang)(liang)(liang)(liang)(liang)直(zhi)流(liu)(liu)(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)時，可直(zhi)接(jie)或經(jing)放(fang)大(da)(da)或經(jing)衰減后(hou)變成(cheng)(cheng)一定量(liang)(liang)(liang)(liang)(liang)的(de)(de)直(zhi)流(liu)(liu)(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)(liu)驅動直(zhi)流(liu)(liu)(liu)(liu)(liu)表(biao)(biao)(biao)(biao)(biao)(biao)頭的(de)(de)指(zhi)針偏轉(zhuan)(zhuan)指(zhi)示。測(ce)量(liang)(liang)(liang)(liang)(liang)交流(liu)(liu)(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)時，必(bi)需(xu)經(jing)過(guo)(guo)交流(liu)(liu)(liu)(liu)(liu)-直(zhi)流(liu)(liu)(liu)(liu)(liu)變換器(qi)即(ji)檢波器(qi)，將被測(ce)交流(liu)(liu)(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)先轉(zhuan)(zhuan)換成(cheng)(cheng)與之成(cheng)(cheng)比例的(de)(de)直(zhi)流(liu)(liu)(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)后(hou)，再進行直(zhi)流(liu)(liu)(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)的(de)(de)測(ce)量(liang)(liang)(liang)(liang)(liang)。模擬(ni)式(shi)(shi)(shi)(shi)(shi)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)表(biao)(biao)(biao)(biao)(biao)(biao)按(an)不同得方(fang)式(shi)(shi)(shi)(shi)(shi)又分(fen)(fen)為如下(xia)(xia)幾(ji)種(zhong)類(lei)(lei)型： ①按(an)工作(zuo)(zuo)頻率分(fen)(fen)類(lei)(lei)：分(fen)(fen)為超(chao)低(di)頻(1kHz以(yi)(yi)下(xia)(xia))、低(di)頻(1MHz以(yi)(yi)下(xia)(xia))、視頻(30MHz以(yi)(yi)下(xia)(xia))、高頻或射頻(300MHz以(yi)(yi)下(xia)(xia))、超(chao)高頻(300MHz以(yi)(yi)上)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)表(biao)(biao)(biao)(biao)(biao)(biao)。 ②按(an)測(ce)量(liang)(liang)(liang)(liang)(liang)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)量(liang)(liang)(liang)(liang)(liang)級分(fen)(fen)類(lei)(lei)：分(fen)(fen)為電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)表(biao)(biao)(biao)(biao)(biao)(biao)(基本(ben)量(liang)(liang)(liang)(liang)(liang)程為V量(liang)(liang)(liang)(liang)(liang)級)和(he)(he)毫伏表(biao)(biao)(biao)(biao)(biao)(biao)(基本(ben)量(liang)(liang)(liang)(liang)(liang)程為mV量(liang)(liang)(liang)(liang)(liang)級)。 ③按(an)檢波方(fang)式(shi)(shi)(shi)(shi)(shi)分(fen)(fen)類(lei)(lei)：分(fen)(fen)為均(jun)值電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)表(biao)(biao)(biao)(biao)(biao)(biao)、有(you)效值電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)表(biao)(biao)(biao)(biao)(biao)(biao)和(he)(he)峰值電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)表(biao)(biao)(biao)(biao)(biao)(biao)。 ④按(an)電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)組成(cheng)(cheng)形式(shi)(shi)(shi)(shi)(shi)分(fen)(fen)類(lei)(lei)：分(fen)(fen)為檢波-放(fang)大(da)(da)式(shi)(shi)(shi)(shi)(shi)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)表(biao)(biao)(biao)(biao)(biao)(biao)、放(fang)大(da)(da)-檢波式(shi)(shi)(shi)(shi)(shi)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)表(biao)(biao)(biao)(biao)(biao)(biao)、外差式(shi)(shi)(shi)(shi)(shi)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)

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