電壓(ya)表的使用方法(fa) 電壓(ya)表原理是什么 電壓(ya)表符號(hao)

電壓表的原理

電壓表指(zhi)(zhi)固定安裝(zhuang)在電(dian)(dian)(dian)(dian)(dian)(dian)(dian)力、電(dian)(dian)(dian)(dian)(dian)(dian)(dian)信、電(dian)(dian)(dian)(dian)(dian)(dian)(dian)子設(she)備面板(ban)上使用(yong)的儀表(biao)(biao)(biao)(biao)(biao)，用(yong)來測(ce)(ce)量(liang)(liang)交(jiao)、直(zhi)流(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)中(zhong)(zhong)的電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)。 1)常用(yong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)表(biao)(biao)(biao)(biao)(biao)——伏特(te)(te)表(biao)(biao)(biao)(biao)(biao) 符(fu)號(hao)：-V- 2)大(da)(da)(da)(da)部分電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)表(biao)(biao)(biao)(biao)(biao)都分為兩個(ge)(ge)(ge)(ge)量(liang)(liang)程(cheng)(cheng)。(0—3V)(0—15V) 3)正確(que)(que)使用(yong)：機(ji)械(xie)調零(把指(zhi)(zhi)針調到(dao)零刻度(du)(du)(du))并聯(lian)(電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)表(biao)(biao)(biao)(biao)(biao)內阻(zu)很大(da)(da)(da)(da)，串(chuan)(chuan)聯(lian)在電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)中(zhong)(zhong)會造成(cheng)斷(duan)路(lu)(lu)。)正進負(fu)出(chu)(使電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)從正極接(jie)(jie)入流(liu)(liu)(liu)進，從負(fu)極接(jie)(jie)入流(liu)(liu)(liu)出(chu)。)量(liang)(liang)程(cheng)(cheng)(被(bei)測(ce)(ce)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)不(bu)能(neng)(neng)超過電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)表(biao)(biao)(biao)(biao)(biao)的量(liang)(liang)程(cheng)(cheng)，注意：如果(guo)不(bu)能(neng)(neng)估計電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)上的電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)，先用(yong)大(da)(da)(da)(da)的量(liang)(liang)程(cheng)(cheng)試觸，粗略測(ce)(ce)得電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)后，再用(yong)適(shi)合的量(liang)(liang)程(cheng)(cheng)。這樣(yang)可(ke)以(yi)防止電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)過大(da)(da)(da)(da)而打彎指(zhi)(zhi)針。) 4)直(zhi)流(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)表(biao)(biao)(biao)(biao)(biao)的符(fu)號(hao)要(yao)在V下(xia)(xia)加(jia)一個(ge)(ge)(ge)(ge)_，交(jiao)流(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)表(biao)(biao)(biao)(biao)(biao)的符(fu)號(hao)要(yao)再V下(xia)(xia)加(jia)一個(ge)(ge)(ge)(ge)波浪線“~” 電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)表(biao)(biao)(biao)(biao)(biao)有三個(ge)(ge)(ge)(ge)接(jie)(jie)線柱(zhu)，一個(ge)(ge)(ge)(ge)負(fu)接(jie)(jie)線柱(zhu)，兩個(ge)(ge)(ge)(ge)正接(jie)(jie)線柱(zhu) 例如學生用(yong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)表(biao)(biao)(biao)(biao)(biao)一般正接(jie)(jie)線柱(zhu)有3V，15V兩個(ge)(ge)(ge)(ge)，測(ce)(ce)量(liang)(liang)時(shi)根據電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)大(da)(da)(da)(da)小(xiao)選擇(ze)量(liang)(liang)程(cheng)(cheng)為“15V”時(shi),刻度(du)(du)(du)盤上的每(mei)個(ge)(ge)(ge)(ge)大(da)(da)(da)(da)格(ge)(ge)表(biao)(biao)(biao)(biao)(biao)示5Ⅴ，每(mei)個(ge)(ge)(ge)(ge)小(xiao)格(ge)(ge)表(biao)(biao)(biao)(biao)(biao)示0.5V(即最小(xiao)分度(du)(du)(du)值是(shi)0.5Ⅴ);量(liang)(liang)程(cheng)(cheng)為“3Ⅴ”時(shi),刻度(du)(du)(du)盤上的每(mei)個(ge)(ge)(ge)(ge)大(da)(da)(da)(da)格(ge)(ge)表(biao)(biao)(biao)(biao)(biao)示lV，每(mei)個(ge)(ge)(ge)(ge)小(xiao)格(ge)(ge)表(biao)(biao)(biao)(biao)(biao)示0.lV(即最小(xiao)分度(du)(du)(du)值是(shi)0.lⅤ)。 我們可(ke)用(yong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)表(biao)(biao)(biao)(biao)(biao)來測(ce)(ce)量(liang)(liang)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)的大(da)(da)(da)(da)小(xiao).電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)表(biao)(biao)(biao)(biao)(biao)的符(fu)號(hao)是(shi)(A). 交(jiao)流(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)表(biao)(biao)(biao)(biao)(biao)不(bu)分正負(fu)極，正確(que)(que)選擇(ze)量(liang)(liang)程(cheng)(cheng)，直(zhi)接(jie)(jie)把電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)表(biao)(biao)(biao)(biao)(biao)并聯(lian)在被(bei)測(ce)(ce)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)的兩端。 交(jiao)流(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)表(biao)(biao)(biao)(biao)(biao)測(ce)(ce)的電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)是(shi)交(jiao)流(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)的有效(xiao)值。 串(chuan)(chuan)，并聯(lian)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)的電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)特(te)(te)點 串(chuan)(chuan)聯(lian)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)中(zhong)(zhong)，總電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(電(dian)(dian)(dian)(dian)(dian)(dian)(dian)源兩端的電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya))等于各(ge)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)兩端的電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)之和(he)。 U=U1+U2 并聯(lian)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)中(zhong)(zhong)，各(ge)支路(lu)(lu)兩端的電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)相等，且等于電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)的總電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(電(dian)(dian)(dian)(dian)(dian)(dian)(dian)源兩端的電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya))。 U=U1=U2

電壓表的原理是什么

在電壓表內(nei)，有(you)一(yi)(yi)個(ge)磁鐵和(he)(he)一(yi)(yi)個(ge)導(dao)線線圈(quan)，通(tong)過(guo)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)后，會使(shi)線圈(quan)產生磁場，這(zhe)(zhe)(zhe)樣(yang)線圈(quan)通(tong)電(dian)(dian)(dian)(dian)(dian)后在(zai)磁鐵的(de)(de)(de)(de)作(zuo)用下會旋轉(zhuan)，這(zhe)(zhe)(zhe)就(jiu)是(shi)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)表(biao)(biao)(biao)(biao)(biao)、電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)表(biao)(biao)(biao)(biao)(biao)的(de)(de)(de)(de)表(biao)(biao)(biao)(biao)(biao)頭部分(fen)(fen)(fen)(fen)(fen)。 這(zhe)(zhe)(zhe)個(ge)表(biao)(biao)(biao)(biao)(biao)頭所能(neng)通(tong)過(guo)的(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)很小，兩端(duan)(duan)所能(neng)承受的(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)也(ye)很小(肯(ken)定(ding)遠小于1V，可(ke)能(neng)只有(you)零(ling)點零(ling)幾伏(fu)甚(shen)至更小)，為(wei)了(le)能(neng)測(ce)量(liang)我(wo)們(men)實際電(dian)(dian)(dian)(dian)(dian)路中(zhong)的(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)，我(wo)們(men)需(xu)要給這(zhe)(zhe)(zhe)個(ge)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)表(biao)(biao)(biao)(biao)(biao)串聯(lian)一(yi)(yi)個(ge)比較大(da)(da)的(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)阻，做成(cheng)(cheng)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)表(biao)(biao)(biao)(biao)(biao)。這(zhe)(zhe)(zhe)樣(yang)，即使(shi)兩端(duan)(duan)加上(shang)(shang)比較大(da)(da)的(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)，可(ke)是(shi)大(da)(da)部分(fen)(fen)(fen)(fen)(fen)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)都(dou)作(zuo)用在(zai)我(wo)們(men)加的(de)(de)(de)(de)那個(ge)大(da)(da)電(dian)(dian)(dian)(dian)(dian)阻上(shang)(shang)了(le)，表(biao)(biao)(biao)(biao)(biao)頭上(shang)(shang)的(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)就(jiu)會很小了(le)。 可(ke)見，電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)表(biao)(biao)(biao)(biao)(biao)是(shi)一(yi)(yi)種(zhong)內(nei)部電(dian)(dian)(dian)(dian)(dian)阻很大(da)(da)的(de)(de)(de)(de)儀器，一(yi)(yi)般(ban)應(ying)該(gai)大(da)(da)于幾千歐。 電(dian)(dian)(dian)(dian)(dian)子電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)表(biao)(biao)(biao)(biao)(biao)的(de)(de)(de)(de)分(fen)(fen)(fen)(fen)(fen)類(lei)(lei) 電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)表(biao)(biao)(biao)(biao)(biao)按(an)(an)(an)(an)其(qi)工作(zuo)原理和(he)(he)讀(du)數(shu)方式(shi)(shi)分(fen)(fen)(fen)(fen)(fen)為(wei)模(mo)擬(ni)式(shi)(shi)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)表(biao)(biao)(biao)(biao)(biao)和(he)(he)數(shu)字式(shi)(shi)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)表(biao)(biao)(biao)(biao)(biao)兩大(da)(da)類(lei)(lei)。 (1)模(mo)擬(ni)式(shi)(shi)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)表(biao)(biao)(biao)(biao)(biao) 模(mo)擬(ni)式(shi)(shi)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)表(biao)(biao)(biao)(biao)(biao)又(you)叫(jiao)指(zhi)針式(shi)(shi)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)表(biao)(biao)(biao)(biao)(biao)，一(yi)(yi)般(ban)都(dou)采用磁電(dian)(dian)(dian)(dian)(dian)式(shi)(shi)直(zhi)流(liu)(liu)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)表(biao)(biao)(biao)(biao)(biao)頭作(zuo)為(wei)被測(ce)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)的(de)(de)(de)(de)指(zhi)示器。測(ce)量(liang)直(zhi)流(liu)(liu)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)時，可(ke)直(zhi)接或(huo)經放大(da)(da)或(huo)經衰減后變(bian)成(cheng)(cheng)一(yi)(yi)定(ding)量(liang)的(de)(de)(de)(de)直(zhi)流(liu)(liu)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)驅動直(zhi)流(liu)(liu)表(biao)(biao)(biao)(biao)(biao)頭的(de)(de)(de)(de)指(zhi)針偏(pian)轉(zhuan)指(zhi)示。測(ce)量(liang)交(jiao)流(liu)(liu)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)時，必需(xu)經過(guo)交(jiao)流(liu)(liu)-直(zhi)流(liu)(liu)變(bian)換器即檢(jian)波(bo)(bo)器，將被測(ce)交(jiao)流(liu)(liu)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)先轉(zhuan)換成(cheng)(cheng)與之(zhi)成(cheng)(cheng)比例的(de)(de)(de)(de)直(zhi)流(liu)(liu)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)后，再進行(xing)直(zhi)流(liu)(liu)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)的(de)(de)(de)(de)測(ce)量(liang)。模(mo)擬(ni)式(shi)(shi)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)表(biao)(biao)(biao)(biao)(biao)按(an)(an)(an)(an)不同得(de)方式(shi)(shi)又(you)分(fen)(fen)(fen)(fen)(fen)為(wei)如下幾種(zhong)類(lei)(lei)型： ①按(an)(an)(an)(an)工作(zuo)頻率分(fen)(fen)(fen)(fen)(fen)類(lei)(lei)：分(fen)(fen)(fen)(fen)(fen)為(wei)超(chao)低(di)頻(1kHz以(yi)(yi)下)、低(di)頻(1MHz以(yi)(yi)下)、視(shi)頻(30MHz以(yi)(yi)下)、高(gao)頻或(huo)射頻(300MHz以(yi)(yi)下)、超(chao)高(gao)頻(300MHz以(yi)(yi)上(shang)(shang))電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)表(biao)(biao)(biao)(biao)(biao)。 ②按(an)(an)(an)(an)測(ce)量(liang)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)量(liang)級(ji)分(fen)(fen)(fen)(fen)(fen)類(lei)(lei)：分(fen)(fen)(fen)(fen)(fen)為(wei)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)表(biao)(biao)(biao)(biao)(biao)(基(ji)(ji)本(ben)量(liang)程(cheng)(cheng)為(wei)V量(liang)級(ji))和(he)(he)毫(hao)伏(fu)表(biao)(biao)(biao)(biao)(biao)(基(ji)(ji)本(ben)量(liang)程(cheng)(cheng)為(wei)mV量(liang)級(ji))。 ③按(an)(an)(an)(an)檢(jian)波(bo)(bo)方式(shi)(shi)分(fen)(fen)(fen)(fen)(fen)類(lei)(lei)：分(fen)(fen)(fen)(fen)(fen)為(wei)均值電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)表(biao)(biao)(biao)(biao)(biao)、有(you)效值電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)表(biao)(biao)(biao)(biao)(biao)和(he)(he)峰值電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)表(biao)(biao)(biao)(biao)(biao)。 ④按(an)(an)(an)(an)電(dian)(dian)(dian)(dian)(dian)路組(zu)成(cheng)(cheng)形式(shi)(shi)分(fen)(fen)(fen)(fen)(fen)類(lei)(lei)：分(fen)(fen)(fen)(fen)(fen)為(wei)檢(jian)波(bo)(bo)-放大(da)(da)式(shi)(shi)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)表(biao)(biao)(biao)(biao)(biao)、放大(da)(da)-檢(jian)波(bo)(bo)式(shi)(shi)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)表(biao)(biao)(biao)(biao)(biao)、外差式(shi)(shi)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)

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