電(dian)(dian)壓表的使(shi)用方(fang)法 電(dian)(dian)壓表原理是什么(me) 電(dian)(dian)壓表符號

電壓表的原理

電壓表指(zhi)(zhi)固定安裝在(zai)(zai)電(dian)(dian)(dian)(dian)(dian)(dian)力(li)、電(dian)(dian)(dian)(dian)(dian)(dian)信、電(dian)(dian)(dian)(dian)(dian)(dian)子設(she)備面板上(shang)(shang)使用(yong)(yong)的(de)(de)儀表(biao)(biao)，用(yong)(yong)來測量(liang)交(jiao)、直流(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)中(zhong)的(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)。 1)常(chang)用(yong)(yong)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)表(biao)(biao)——伏特(te)表(biao)(biao) 符(fu)號(hao)：-V- 2)大(da)部分(fen)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)表(biao)(biao)都分(fen)為(wei)(wei)兩(liang)(liang)(liang)個(ge)(ge)量(liang)程(cheng)。(0—3V)(0—15V) 3)正(zheng)(zheng)確(que)使用(yong)(yong)：機械調零(把指(zhi)(zhi)針調到零刻度(du))并(bing)聯(lian)(電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)表(biao)(biao)內阻很大(da)，串聯(lian)在(zai)(zai)電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)中(zhong)會造(zao)成斷路(lu)。)正(zheng)(zheng)進負出(使電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)從(cong)(cong)正(zheng)(zheng)極接(jie)(jie)(jie)(jie)入流(liu)(liu)進，從(cong)(cong)負極接(jie)(jie)(jie)(jie)入流(liu)(liu)出。)量(liang)程(cheng)(被(bei)測電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)不(bu)能(neng)超(chao)過電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)表(biao)(biao)的(de)(de)量(liang)程(cheng)，注意：如果不(bu)能(neng)估計(ji)電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)上(shang)(shang)的(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)，先(xian)用(yong)(yong)大(da)的(de)(de)量(liang)程(cheng)試觸(chu)，粗略測得(de)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)后，再用(yong)(yong)適合的(de)(de)量(liang)程(cheng)。這樣可以防止電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)過大(da)而打彎指(zhi)(zhi)針。) 4)直流(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)表(biao)(biao)的(de)(de)符(fu)號(hao)要在(zai)(zai)V下加(jia)(jia)一個(ge)(ge)_，交(jiao)流(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)表(biao)(biao)的(de)(de)符(fu)號(hao)要再V下加(jia)(jia)一個(ge)(ge)波浪線(xian)(xian)“~” 電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)表(biao)(biao)有三個(ge)(ge)接(jie)(jie)(jie)(jie)線(xian)(xian)柱，一個(ge)(ge)負接(jie)(jie)(jie)(jie)線(xian)(xian)柱，兩(liang)(liang)(liang)個(ge)(ge)正(zheng)(zheng)接(jie)(jie)(jie)(jie)線(xian)(xian)柱 例如學生用(yong)(yong)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)表(biao)(biao)一般正(zheng)(zheng)接(jie)(jie)(jie)(jie)線(xian)(xian)柱有3V，15V兩(liang)(liang)(liang)個(ge)(ge)，測量(liang)時根據(ju)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)大(da)小選擇量(liang)程(cheng)為(wei)(wei)“15V”時,刻度(du)盤(pan)(pan)上(shang)(shang)的(de)(de)每(mei)個(ge)(ge)大(da)格表(biao)(biao)示5Ⅴ，每(mei)個(ge)(ge)小格表(biao)(biao)示0.5V(即最小分(fen)度(du)值(zhi)是(shi)0.5Ⅴ);量(liang)程(cheng)為(wei)(wei)“3Ⅴ”時,刻度(du)盤(pan)(pan)上(shang)(shang)的(de)(de)每(mei)個(ge)(ge)大(da)格表(biao)(biao)示lV，每(mei)個(ge)(ge)小格表(biao)(biao)示0.lV(即最小分(fen)度(du)值(zhi)是(shi)0.lⅤ)。 我們可用(yong)(yong)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)表(biao)(biao)來測量(liang)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)的(de)(de)大(da)小.電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)表(biao)(biao)的(de)(de)符(fu)號(hao)是(shi)(A). 交(jiao)流(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)表(biao)(biao)不(bu)分(fen)正(zheng)(zheng)負極，正(zheng)(zheng)確(que)選擇量(liang)程(cheng)，直接(jie)(jie)(jie)(jie)把電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)表(biao)(biao)并(bing)聯(lian)在(zai)(zai)被(bei)測電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)的(de)(de)兩(liang)(liang)(liang)端(duan)(duan)。 交(jiao)流(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)表(biao)(biao)測的(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)是(shi)交(jiao)流(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)的(de)(de)有效值(zhi)。 串，并(bing)聯(lian)電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)的(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)特(te)點(dian) 串聯(lian)電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)中(zhong)，總電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)兩(liang)(liang)(liang)端(duan)(duan)的(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya))等于各電(dian)(dian)(dian)(dian)(dian)(dian)阻兩(liang)(liang)(liang)端(duan)(duan)的(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)之和(he)。 U=U1+U2 并(bing)聯(lian)電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)中(zhong)，各支路(lu)兩(liang)(liang)(liang)端(duan)(duan)的(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)相等，且(qie)等于電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)的(de)(de)總電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)兩(liang)(liang)(liang)端(duan)(duan)的(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya))。 U=U1=U2

電壓表的原理是什么

在電壓表內，有一(yi)(yi)個磁(ci)鐵和(he)一(yi)(yi)個導線(xian)線(xian)圈，通過(guo)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)后(hou)，會(hui)使線(xian)圈產生磁(ci)場，這樣線(xian)圈通電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)后(hou)在(zai)磁(ci)鐵的(de)作(zuo)用下(xia)會(hui)旋(xuan)轉(zhuan)，這就是(shi)(shi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)表(biao)(biao)(biao)、電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)表(biao)(biao)(biao)的(de)表(biao)(biao)(biao)頭(tou)部(bu)分(fen)。 這個表(biao)(biao)(biao)頭(tou)所(suo)能通過(guo)的(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)很小(xiao)，兩(liang)(liang)端(duan)所(suo)能承受的(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)也很小(xiao)(肯定(ding)遠(yuan)小(xiao)于(yu)1V，可能只有零點零幾(ji)伏甚至更小(xiao))，為(wei)(wei)了能測(ce)(ce)(ce)量(liang)(liang)我(wo)(wo)們(men)實(shi)際電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)中的(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)，我(wo)(wo)們(men)需(xu)要給(gei)這個電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)表(biao)(biao)(biao)串聯一(yi)(yi)個比(bi)(bi)較大(da)(da)的(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)，做成(cheng)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)表(biao)(biao)(biao)。這樣，即使兩(liang)(liang)端(duan)加(jia)上比(bi)(bi)較大(da)(da)的(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)，可是(shi)(shi)大(da)(da)部(bu)分(fen)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)都作(zuo)用在(zai)我(wo)(wo)們(men)加(jia)的(de)那個大(da)(da)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)上了，表(biao)(biao)(biao)頭(tou)上的(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)就會(hui)很小(xiao)了。 可見，電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)表(biao)(biao)(biao)是(shi)(shi)一(yi)(yi)種(zhong)(zhong)內部(bu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)很大(da)(da)的(de)儀器(qi)，一(yi)(yi)般應該(gai)大(da)(da)于(yu)幾(ji)千歐。 電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)子電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)表(biao)(biao)(biao)的(de)分(fen)類(lei)(lei) 電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)表(biao)(biao)(biao)按(an)其工作(zuo)原(yuan)理(li)和(he)讀數方(fang)式(shi)(shi)分(fen)為(wei)(wei)模(mo)擬(ni)式(shi)(shi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)表(biao)(biao)(biao)和(he)數字式(shi)(shi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)表(biao)(biao)(biao)兩(liang)(liang)大(da)(da)類(lei)(lei)。 (1)模(mo)擬(ni)式(shi)(shi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)表(biao)(biao)(biao) 模(mo)擬(ni)式(shi)(shi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)表(biao)(biao)(biao)又(you)叫指(zhi)針(zhen)式(shi)(shi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)表(biao)(biao)(biao)，一(yi)(yi)般都采用磁(ci)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)式(shi)(shi)直(zhi)流(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)表(biao)(biao)(biao)頭(tou)作(zuo)為(wei)(wei)被(bei)測(ce)(ce)(ce)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)的(de)指(zhi)示器(qi)。測(ce)(ce)(ce)量(liang)(liang)直(zhi)流(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)時，可直(zhi)接或經(jing)放大(da)(da)或經(jing)衰減后(hou)變成(cheng)一(yi)(yi)定(ding)量(liang)(liang)的(de)直(zhi)流(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)驅動(dong)直(zhi)流(liu)(liu)(liu)表(biao)(biao)(biao)頭(tou)的(de)指(zhi)針(zhen)偏轉(zhuan)指(zhi)示。測(ce)(ce)(ce)量(liang)(liang)交(jiao)流(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)時，必需(xu)經(jing)過(guo)交(jiao)流(liu)(liu)(liu)-直(zhi)流(liu)(liu)(liu)變換器(qi)即檢(jian)波(bo)(bo)器(qi)，將被(bei)測(ce)(ce)(ce)交(jiao)流(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)先轉(zhuan)換成(cheng)與之成(cheng)比(bi)(bi)例(li)的(de)直(zhi)流(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)后(hou)，再進行直(zhi)流(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)的(de)測(ce)(ce)(ce)量(liang)(liang)。模(mo)擬(ni)式(shi)(shi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)表(biao)(biao)(biao)按(an)不同(tong)得方(fang)式(shi)(shi)又(you)分(fen)為(wei)(wei)如(ru)下(xia)幾(ji)種(zhong)(zhong)類(lei)(lei)型(xing)： ①按(an)工作(zuo)頻(pin)率分(fen)類(lei)(lei)：分(fen)為(wei)(wei)超(chao)低頻(pin)(1kHz以(yi)下(xia))、低頻(pin)(1MHz以(yi)下(xia))、視頻(pin)(30MHz以(yi)下(xia))、高頻(pin)或射(she)頻(pin)(300MHz以(yi)下(xia))、超(chao)高頻(pin)(300MHz以(yi)上)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)表(biao)(biao)(biao)。 ②按(an)測(ce)(ce)(ce)量(liang)(liang)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)量(liang)(liang)級分(fen)類(lei)(lei)：分(fen)為(wei)(wei)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)表(biao)(biao)(biao)(基本量(liang)(liang)程(cheng)為(wei)(wei)V量(liang)(liang)級)和(he)毫伏表(biao)(biao)(biao)(基本量(liang)(liang)程(cheng)為(wei)(wei)mV量(liang)(liang)級)。 ③按(an)檢(jian)波(bo)(bo)方(fang)式(shi)(shi)分(fen)類(lei)(lei)：分(fen)為(wei)(wei)均(jun)值電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)表(biao)(biao)(biao)、有效值電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)表(biao)(biao)(biao)和(he)峰值電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)表(biao)(biao)(biao)。 ④按(an)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)組成(cheng)形式(shi)(shi)分(fen)類(lei)(lei)：分(fen)為(wei)(wei)檢(jian)波(bo)(bo)-放大(da)(da)式(shi)(shi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)表(biao)(biao)(biao)、放大(da)(da)-檢(jian)波(bo)(bo)式(shi)(shi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)表(biao)(biao)(biao)、外差式(shi)(shi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)

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