電(dian)壓表(biao)(biao)的使用方法 電(dian)壓表(biao)(biao)原理是什么 電(dian)壓表(biao)(biao)符號

電壓表的原理

電壓表指固(gu)定安裝(zhuang)在(zai)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)力(li)、電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)信、電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)子設備面板上(shang)使用(yong)的(de)(de)儀表(biao)(biao)(biao)(biao)，用(yong)來測(ce)量(liang)(liang)(liang)交(jiao)(jiao)、直(zhi)(zhi)(zhi)流(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)中的(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)。 1)常用(yong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)表(biao)(biao)(biao)(biao)——伏特表(biao)(biao)(biao)(biao) 符號(hao)：-V- 2)大(da)部(bu)分(fen)(fen)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)表(biao)(biao)(biao)(biao)都分(fen)(fen)為(wei)兩(liang)個(ge)(ge)量(liang)(liang)(liang)程。(0—3V)(0—15V) 3)正(zheng)(zheng)確使用(yong)：機械調(diao)零(把指針(zhen)調(diao)到零刻(ke)度(du)(du))并(bing)(bing)聯(lian)(lian)(電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)表(biao)(biao)(biao)(biao)內阻很大(da)，串聯(lian)(lian)在(zai)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)中會造成斷路(lu)(lu)(lu)。)正(zheng)(zheng)進負出(使電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)從正(zheng)(zheng)極接入(ru)(ru)流(liu)(liu)(liu)進，從負極接入(ru)(ru)流(liu)(liu)(liu)出。)量(liang)(liang)(liang)程(被測(ce)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)不能超過電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)表(biao)(biao)(biao)(biao)的(de)(de)量(liang)(liang)(liang)程，注意(yi)：如(ru)(ru)果不能估計電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)上(shang)的(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)，先用(yong)大(da)的(de)(de)量(liang)(liang)(liang)程試觸，粗略測(ce)得(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)后，再用(yong)適合的(de)(de)量(liang)(liang)(liang)程。這(zhe)樣可以防(fang)止(zhi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)過大(da)而打彎指針(zhen)。) 4)直(zhi)(zhi)(zhi)流(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)表(biao)(biao)(biao)(biao)的(de)(de)符號(hao)要(yao)在(zai)V下(xia)加一(yi)(yi)個(ge)(ge)_，交(jiao)(jiao)流(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)表(biao)(biao)(biao)(biao)的(de)(de)符號(hao)要(yao)再V下(xia)加一(yi)(yi)個(ge)(ge)波浪線(xian)“~” 電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)表(biao)(biao)(biao)(biao)有(you)三個(ge)(ge)接線(xian)柱(zhu)，一(yi)(yi)個(ge)(ge)負接線(xian)柱(zhu)，兩(liang)個(ge)(ge)正(zheng)(zheng)接線(xian)柱(zhu) 例如(ru)(ru)學(xue)生用(yong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)表(biao)(biao)(biao)(biao)一(yi)(yi)般正(zheng)(zheng)接線(xian)柱(zhu)有(you)3V，15V兩(liang)個(ge)(ge)，測(ce)量(liang)(liang)(liang)時根據電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)大(da)小選擇量(liang)(liang)(liang)程為(wei)“15V”時,刻(ke)度(du)(du)盤上(shang)的(de)(de)每(mei)(mei)個(ge)(ge)大(da)格(ge)表(biao)(biao)(biao)(biao)示(shi)(shi)5Ⅴ，每(mei)(mei)個(ge)(ge)小格(ge)表(biao)(biao)(biao)(biao)示(shi)(shi)0.5V(即最小分(fen)(fen)度(du)(du)值(zhi)是(shi)0.5Ⅴ);量(liang)(liang)(liang)程為(wei)“3Ⅴ”時,刻(ke)度(du)(du)盤上(shang)的(de)(de)每(mei)(mei)個(ge)(ge)大(da)格(ge)表(biao)(biao)(biao)(biao)示(shi)(shi)lV，每(mei)(mei)個(ge)(ge)小格(ge)表(biao)(biao)(biao)(biao)示(shi)(shi)0.lV(即最小分(fen)(fen)度(du)(du)值(zhi)是(shi)0.lⅤ)。 我(wo)們可用(yong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)表(biao)(biao)(biao)(biao)來測(ce)量(liang)(liang)(liang)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)的(de)(de)大(da)小.電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)表(biao)(biao)(biao)(biao)的(de)(de)符號(hao)是(shi)(A). 交(jiao)(jiao)流(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)表(biao)(biao)(biao)(biao)不分(fen)(fen)正(zheng)(zheng)負極，正(zheng)(zheng)確選擇量(liang)(liang)(liang)程，直(zhi)(zhi)(zhi)接把電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)表(biao)(biao)(biao)(biao)并(bing)(bing)聯(lian)(lian)在(zai)被測(ce)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)的(de)(de)兩(liang)端。 交(jiao)(jiao)流(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)表(biao)(biao)(biao)(biao)測(ce)的(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)是(shi)交(jiao)(jiao)流(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)的(de)(de)有(you)效值(zhi)。 串，并(bing)(bing)聯(lian)(lian)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)的(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)特點(dian) 串聯(lian)(lian)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)中，總電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)兩(liang)端的(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya))等于各(ge)(ge)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻兩(liang)端的(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)之和。 U=U1+U2 并(bing)(bing)聯(lian)(lian)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)中，各(ge)(ge)支路(lu)(lu)(lu)兩(liang)端的(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)相等，且(qie)等于電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)的(de)(de)總電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)兩(liang)端的(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(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(yi)個(ge)磁(ci)鐵(tie)(tie)和(he)一(yi)個(ge)導線(xian)(xian)線(xian)(xian)圈，通過(guo)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)后，會使線(xian)(xian)圈產生磁(ci)場，這樣線(xian)(xian)圈通電(dian)(dian)(dian)(dian)(dian)后在磁(ci)鐵(tie)(tie)的(de)(de)(de)(de)作用(yong)下(xia)(xia)會旋轉(zhuan)，這就是(shi)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)表(biao)(biao)(biao)(biao)(biao)、電(dian)(dian)(dian)(dian)(dian)壓(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(tou)部(bu)分(fen)(fen)(fen)(fen)。 這個(ge)表(biao)(biao)(biao)(biao)(biao)頭(tou)所能通過(guo)的(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)很(hen)(hen)小(xiao)，兩端所能承受的(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)也很(hen)(hen)小(xiao)(肯定遠小(xiao)于1V，可(ke)(ke)能只有(you)零(ling)點零(ling)幾伏甚至更小(xiao))，為(wei)(wei)(wei)了(le)能測(ce)量(liang)(liang)(liang)(liang)(liang)(liang)我(wo)們(men)實際電(dian)(dian)(dian)(dian)(dian)路中的(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)，我(wo)們(men)需(xu)要(yao)給這個(ge)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)表(biao)(biao)(biao)(biao)(biao)串聯一(yi)個(ge)比(bi)較大(da)的(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)阻，做(zuo)成電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)表(biao)(biao)(biao)(biao)(biao)。這樣，即使兩端加上比(bi)較大(da)的(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)，可(ke)(ke)是(shi)大(da)部(bu)分(fen)(fen)(fen)(fen)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)都(dou)作用(yong)在我(wo)們(men)加的(de)(de)(de)(de)那個(ge)大(da)電(dian)(dian)(dian)(dian)(dian)阻上了(le)，表(biao)(biao)(biao)(biao)(biao)頭(tou)上的(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)就會很(hen)(hen)小(xiao)了(le)。 可(ke)(ke)見，電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)表(biao)(biao)(biao)(biao)(biao)是(shi)一(yi)種(zhong)內(nei)部(bu)電(dian)(dian)(dian)(dian)(dian)阻很(hen)(hen)大(da)的(de)(de)(de)(de)儀器(qi)，一(yi)般(ban)應該大(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)表(biao)(biao)(biao)(biao)(biao)的(de)(de)(de)(de)分(fen)(fen)(fen)(fen)類 電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)表(biao)(biao)(biao)(biao)(biao)按(an)其(qi)工作原理和(he)讀數(shu)方式(shi)(shi)(shi)(shi)分(fen)(fen)(fen)(fen)為(wei)(wei)(wei)模(mo)擬(ni)式(shi)(shi)(shi)(shi)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)表(biao)(biao)(biao)(biao)(biao)和(he)數(shu)字式(shi)(shi)(shi)(shi)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)表(biao)(biao)(biao)(biao)(biao)兩大(da)類。 (1)模(mo)擬(ni)式(shi)(shi)(shi)(shi)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)表(biao)(biao)(biao)(biao)(biao) 模(mo)擬(ni)式(shi)(shi)(shi)(shi)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)表(biao)(biao)(biao)(biao)(biao)又(you)叫指(zhi)針(zhen)式(shi)(shi)(shi)(shi)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)表(biao)(biao)(biao)(biao)(biao)，一(yi)般(ban)都(dou)采用(yong)磁(ci)電(dian)(dian)(dian)(dian)(dian)式(shi)(shi)(shi)(shi)直(zhi)(zhi)流(liu)(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)表(biao)(biao)(biao)(biao)(biao)頭(tou)作為(wei)(wei)(wei)被測(ce)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)的(de)(de)(de)(de)指(zhi)示器(qi)。測(ce)量(liang)(liang)(liang)(liang)(liang)(liang)直(zhi)(zhi)流(liu)(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)時，可(ke)(ke)直(zhi)(zhi)接或(huo)經放(fang)大(da)或(huo)經衰減后變成一(yi)定量(liang)(liang)(liang)(liang)(liang)(liang)的(de)(de)(de)(de)直(zhi)(zhi)流(liu)(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)驅動直(zhi)(zhi)流(liu)(liu)(liu)(liu)表(biao)(biao)(biao)(biao)(biao)頭(tou)的(de)(de)(de)(de)指(zhi)針(zhen)偏轉(zhuan)指(zhi)示。測(ce)量(liang)(liang)(liang)(liang)(liang)(liang)交(jiao)流(liu)(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)時，必需(xu)經過(guo)交(jiao)流(liu)(liu)(liu)(liu)-直(zhi)(zhi)流(liu)(liu)(liu)(liu)變換器(qi)即檢波(bo)(bo)器(qi)，將被測(ce)交(jiao)流(liu)(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)先轉(zhuan)換成與之成比(bi)例(li)的(de)(de)(de)(de)直(zhi)(zhi)流(liu)(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)后，再進行直(zhi)(zhi)流(liu)(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)的(de)(de)(de)(de)測(ce)量(liang)(liang)(liang)(liang)(liang)(liang)。模(mo)擬(ni)式(shi)(shi)(shi)(shi)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)表(biao)(biao)(biao)(biao)(biao)按(an)不同得方式(shi)(shi)(shi)(shi)又(you)分(fen)(fen)(fen)(fen)為(wei)(wei)(wei)如下(xia)(xia)幾種(zhong)類型： ①按(an)工作頻(pin)(pin)(pin)率分(fen)(fen)(fen)(fen)類：分(fen)(fen)(fen)(fen)為(wei)(wei)(wei)超(chao)低(di)頻(pin)(pin)(pin)(1kHz以(yi)(yi)下(xia)(xia))、低(di)頻(pin)(pin)(pin)(1MHz以(yi)(yi)下(xia)(xia))、視頻(pin)(pin)(pin)(30MHz以(yi)(yi)下(xia)(xia))、高頻(pin)(pin)(pin)或(huo)射(she)頻(pin)(pin)(pin)(300MHz以(yi)(yi)下(xia)(xia))、超(chao)高頻(pin)(pin)(pin)(300MHz以(yi)(yi)上)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)表(biao)(biao)(biao)(biao)(biao)。 ②按(an)測(ce)量(liang)(liang)(liang)(liang)(liang)(liang)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)量(liang)(liang)(liang)(liang)(liang)(liang)級(ji)分(fen)(fen)(fen)(fen)類：分(fen)(fen)(fen)(fen)為(wei)(wei)(wei)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)表(biao)(biao)(biao)(biao)(biao)(基(ji)本(ben)量(liang)(liang)(liang)(liang)(liang)(liang)程(cheng)為(wei)(wei)(wei)V量(liang)(liang)(liang)(liang)(liang)(liang)級(ji))和(he)毫伏表(biao)(biao)(biao)(biao)(biao)(基(ji)本(ben)量(liang)(liang)(liang)(liang)(liang)(liang)程(cheng)為(wei)(wei)(wei)mV量(liang)(liang)(liang)(liang)(liang)(liang)級(ji))。 ③按(an)檢波(bo)(bo)方式(shi)(shi)(shi)(shi)分(fen)(fen)(fen)(fen)類：分(fen)(fen)(fen)(fen)為(wei)(wei)(wei)均值(zhi)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)表(biao)(biao)(biao)(biao)(biao)、有(you)效(xiao)值(zhi)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)表(biao)(biao)(biao)(biao)(biao)和(he)峰值(zhi)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)表(biao)(biao)(biao)(biao)(biao)。 ④按(an)電(dian)(dian)(dian)(dian)(dian)路組成形式(shi)(shi)(shi)(shi)分(fen)(fen)(fen)(fen)類：分(fen)(fen)(fen)(fen)為(wei)(wei)(wei)檢波(bo)(bo)-放(fang)大(da)式(shi)(shi)(shi)(shi)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)表(biao)(biao)(biao)(biao)(biao)、放(fang)大(da)-檢波(bo)(bo)式(shi)(shi)(shi)(shi)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)表(biao)(biao)(biao)(biao)(biao)、外差式(shi)(shi)(shi)(shi)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)

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