電壓(ya)表的使(shi)用方法 電壓(ya)表原理是什么 電壓(ya)表符號

電壓表的原理

電壓表指固定安裝在電(dian)(dian)(dian)(dian)力、電(dian)(dian)(dian)(dian)信、電(dian)(dian)(dian)(dian)子設備面板(ban)上(shang)使(shi)用(yong)(yong)(yong)的(de)(de)(de)儀(yi)表(biao)(biao)(biao)，用(yong)(yong)(yong)來測(ce)(ce)(ce)量(liang)(liang)(liang)交(jiao)(jiao)、直流(liu)電(dian)(dian)(dian)(dian)路(lu)中(zhong)的(de)(de)(de)電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)。 1)常用(yong)(yong)(yong)電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)表(biao)(biao)(biao)——伏特表(biao)(biao)(biao) 符(fu)號(hao)(hao)：-V- 2)大(da)(da)部(bu)分電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)表(biao)(biao)(biao)都分為(wei)兩(liang)(liang)(liang)(liang)個(ge)量(liang)(liang)(liang)程(cheng)(cheng)(cheng)。(0—3V)(0—15V) 3)正確(que)使(shi)用(yong)(yong)(yong)：機械調零(把指針(zhen)調到(dao)零刻(ke)度)并聯(電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)表(biao)(biao)(biao)內阻很大(da)(da)，串聯在電(dian)(dian)(dian)(dian)路(lu)中(zhong)會造成斷路(lu)。)正進(jin)負(fu)出(使(shi)電(dian)(dian)(dian)(dian)流(liu)從正極接入(ru)流(liu)進(jin)，從負(fu)極接入(ru)流(liu)出。)量(liang)(liang)(liang)程(cheng)(cheng)(cheng)(被測(ce)(ce)(ce)電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)不(bu)(bu)能超過電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)表(biao)(biao)(biao)的(de)(de)(de)量(liang)(liang)(liang)程(cheng)(cheng)(cheng)，注意：如果不(bu)(bu)能估計電(dian)(dian)(dian)(dian)路(lu)上(shang)的(de)(de)(de)電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)，先用(yong)(yong)(yong)大(da)(da)的(de)(de)(de)量(liang)(liang)(liang)程(cheng)(cheng)(cheng)試觸，粗略測(ce)(ce)(ce)得電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)后(hou)，再(zai)用(yong)(yong)(yong)適(shi)合的(de)(de)(de)量(liang)(liang)(liang)程(cheng)(cheng)(cheng)。這樣(yang)可以防止電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)過大(da)(da)而打彎指針(zhen)。) 4)直流(liu)電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)表(biao)(biao)(biao)的(de)(de)(de)符(fu)號(hao)(hao)要在V下加一(yi)個(ge)_，交(jiao)(jiao)流(liu)電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)表(biao)(biao)(biao)的(de)(de)(de)符(fu)號(hao)(hao)要再(zai)V下加一(yi)個(ge)波浪線“~” 電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)表(biao)(biao)(biao)有(you)三個(ge)接線柱(zhu)，一(yi)個(ge)負(fu)接線柱(zhu)，兩(liang)(liang)(liang)(liang)個(ge)正接線柱(zhu) 例如學生用(yong)(yong)(yong)電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)表(biao)(biao)(biao)一(yi)般正接線柱(zhu)有(you)3V，15V兩(liang)(liang)(liang)(liang)個(ge)，測(ce)(ce)(ce)量(liang)(liang)(liang)時根據(ju)電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)大(da)(da)小選擇量(liang)(liang)(liang)程(cheng)(cheng)(cheng)為(wei)“15V”時,刻(ke)度盤(pan)上(shang)的(de)(de)(de)每個(ge)大(da)(da)格(ge)表(biao)(biao)(biao)示(shi)(shi)5Ⅴ，每個(ge)小格(ge)表(biao)(biao)(biao)示(shi)(shi)0.5V(即最(zui)小分度值是(shi)0.5Ⅴ);量(liang)(liang)(liang)程(cheng)(cheng)(cheng)為(wei)“3Ⅴ”時,刻(ke)度盤(pan)上(shang)的(de)(de)(de)每個(ge)大(da)(da)格(ge)表(biao)(biao)(biao)示(shi)(shi)lV，每個(ge)小格(ge)表(biao)(biao)(biao)示(shi)(shi)0.lV(即最(zui)小分度值是(shi)0.lⅤ)。 我們可用(yong)(yong)(yong)電(dian)(dian)(dian)(dian)流(liu)表(biao)(biao)(biao)來測(ce)(ce)(ce)量(liang)(liang)(liang)電(dian)(dian)(dian)(dian)流(liu)的(de)(de)(de)大(da)(da)小.電(dian)(dian)(dian)(dian)流(liu)表(biao)(biao)(biao)的(de)(de)(de)符(fu)號(hao)(hao)是(shi)(A). 交(jiao)(jiao)流(liu)電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)表(biao)(biao)(biao)不(bu)(bu)分正負(fu)極，正確(que)選擇量(liang)(liang)(liang)程(cheng)(cheng)(cheng)，直接把電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)表(biao)(biao)(biao)并聯在被測(ce)(ce)(ce)電(dian)(dian)(dian)(dian)路(lu)的(de)(de)(de)兩(liang)(liang)(liang)(liang)端(duan)(duan)(duan)。 交(jiao)(jiao)流(liu)電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)表(biao)(biao)(biao)測(ce)(ce)(ce)的(de)(de)(de)電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)是(shi)交(jiao)(jiao)流(liu)電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)的(de)(de)(de)有(you)效值。 串，并聯電(dian)(dian)(dian)(dian)路(lu)的(de)(de)(de)電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)特點 串聯電(dian)(dian)(dian)(dian)路(lu)中(zhong)，總電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)(電(dian)(dian)(dian)(dian)源(yuan)兩(liang)(liang)(liang)(liang)端(duan)(duan)(duan)的(de)(de)(de)電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya))等于各(ge)電(dian)(dian)(dian)(dian)阻兩(liang)(liang)(liang)(liang)端(duan)(duan)(duan)的(de)(de)(de)電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)之和。 U=U1+U2 并聯電(dian)(dian)(dian)(dian)路(lu)中(zhong)，各(ge)支路(lu)兩(liang)(liang)(liang)(liang)端(duan)(duan)(duan)的(de)(de)(de)電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)相(xiang)等，且等于電(dian)(dian)(dian)(dian)路(lu)的(de)(de)(de)總電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)(電(dian)(dian)(dian)(dian)源(yuan)兩(liang)(liang)(liang)(liang)端(duan)(duan)(duan)的(de)(de)(de)電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(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)個磁鐵(tie)(tie)和(he)一(yi)(yi)個導線線圈(quan)，通過電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)后，會使線圈(quan)產生磁場，這(zhe)樣線圈(quan)通電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)后在(zai)磁鐵(tie)(tie)的(de)(de)(de)(de)(de)作(zuo)(zuo)用下(xia)會旋轉，這(zhe)就是(shi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)表(biao)(biao)(biao)(biao)(biao)、電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)表(biao)(biao)(biao)(biao)(biao)的(de)(de)(de)(de)(de)表(biao)(biao)(biao)(biao)(biao)頭(tou)(tou)(tou)部(bu)分(fen)(fen)(fen)(fen)。 這(zhe)個表(biao)(biao)(biao)(biao)(biao)頭(tou)(tou)(tou)所能通過的(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)很小，兩(liang)端(duan)所能承(cheng)受的(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)也很小(肯定(ding)遠小于(yu)1V，可(ke)能只有零點零幾伏甚至更小)，為(wei)(wei)(wei)了能測(ce)(ce)量(liang)我們(men)實際電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路中的(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)，我們(men)需要給這(zhe)個電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)表(biao)(biao)(biao)(biao)(biao)串聯一(yi)(yi)個比較(jiao)大(da)(da)的(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)，做(zuo)成(cheng)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)表(biao)(biao)(biao)(biao)(biao)。這(zhe)樣，即(ji)使兩(liang)端(duan)加上比較(jiao)大(da)(da)的(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)，可(ke)是(shi)大(da)(da)部(bu)分(fen)(fen)(fen)(fen)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)都作(zuo)(zuo)用在(zai)我們(men)加的(de)(de)(de)(de)(de)那個大(da)(da)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)上了，表(biao)(biao)(biao)(biao)(biao)頭(tou)(tou)(tou)上的(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)就會很小了。 可(ke)見，電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)表(biao)(biao)(biao)(biao)(biao)是(shi)一(yi)(yi)種內部(bu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)很大(da)(da)的(de)(de)(de)(de)(de)儀器(qi)，一(yi)(yi)般(ban)應(ying)該大(da)(da)于(yu)幾千歐。 電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)子電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)表(biao)(biao)(biao)(biao)(biao)的(de)(de)(de)(de)(de)分(fen)(fen)(fen)(fen)類(lei) 電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)表(biao)(biao)(biao)(biao)(biao)按(an)其工(gong)作(zuo)(zuo)原理(li)和(he)讀數(shu)方(fang)式(shi)分(fen)(fen)(fen)(fen)為(wei)(wei)(wei)模(mo)擬式(shi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)表(biao)(biao)(biao)(biao)(biao)和(he)數(shu)字式(shi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)表(biao)(biao)(biao)(biao)(biao)兩(liang)大(da)(da)類(lei)。 (1)模(mo)擬式(shi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)表(biao)(biao)(biao)(biao)(biao) 模(mo)擬式(shi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)表(biao)(biao)(biao)(biao)(biao)又叫指針式(shi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)表(biao)(biao)(biao)(biao)(biao)，一(yi)(yi)般(ban)都采(cai)用磁電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)式(shi)直(zhi)(zhi)流(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)表(biao)(biao)(biao)(biao)(biao)頭(tou)(tou)(tou)作(zuo)(zuo)為(wei)(wei)(wei)被測(ce)(ce)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)的(de)(de)(de)(de)(de)指示(shi)器(qi)。測(ce)(ce)量(liang)直(zhi)(zhi)流(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)時，可(ke)直(zhi)(zhi)接或經(jing)(jing)放(fang)(fang)大(da)(da)或經(jing)(jing)衰減后變成(cheng)一(yi)(yi)定(ding)量(liang)的(de)(de)(de)(de)(de)直(zhi)(zhi)流(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)驅(qu)動直(zhi)(zhi)流(liu)表(biao)(biao)(biao)(biao)(biao)頭(tou)(tou)(tou)的(de)(de)(de)(de)(de)指針偏轉指示(shi)。測(ce)(ce)量(liang)交流(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)時，必需經(jing)(jing)過交流(liu)-直(zhi)(zhi)流(liu)變換器(qi)即(ji)檢波器(qi)，將(jiang)被測(ce)(ce)交流(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)先轉換成(cheng)與之成(cheng)比例的(de)(de)(de)(de)(de)直(zhi)(zhi)流(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)后，再(zai)進行直(zhi)(zhi)流(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)的(de)(de)(de)(de)(de)測(ce)(ce)量(liang)。模(mo)擬式(shi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)表(biao)(biao)(biao)(biao)(biao)按(an)不同(tong)得(de)方(fang)式(shi)又分(fen)(fen)(fen)(fen)為(wei)(wei)(wei)如下(xia)幾種類(lei)型： ①按(an)工(gong)作(zuo)(zuo)頻(pin)(pin)率分(fen)(fen)(fen)(fen)類(lei)：分(fen)(fen)(fen)(fen)為(wei)(wei)(wei)超(chao)低(di)頻(pin)(pin)(1kHz以(yi)(yi)下(xia))、低(di)頻(pin)(pin)(1MHz以(yi)(yi)下(xia))、視(shi)頻(pin)(pin)(30MHz以(yi)(yi)下(xia))、高(gao)頻(pin)(pin)或射(she)頻(pin)(pin)(300MHz以(yi)(yi)下(xia))、超(chao)高(gao)頻(pin)(pin)(300MHz以(yi)(yi)上)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)表(biao)(biao)(biao)(biao)(biao)。 ②按(an)測(ce)(ce)量(liang)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)量(liang)級分(fen)(fen)(fen)(fen)類(lei)：分(fen)(fen)(fen)(fen)為(wei)(wei)(wei)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)表(biao)(biao)(biao)(biao)(biao)(基本(ben)量(liang)程為(wei)(wei)(wei)V量(liang)級)和(he)毫伏表(biao)(biao)(biao)(biao)(biao)(基本(ben)量(liang)程為(wei)(wei)(wei)mV量(liang)級)。 ③按(an)檢波方(fang)式(shi)分(fen)(fen)(fen)(fen)類(lei)：分(fen)(fen)(fen)(fen)為(wei)(wei)(wei)均值(zhi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)表(biao)(biao)(biao)(biao)(biao)、有效值(zhi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)表(biao)(biao)(biao)(biao)(biao)和(he)峰值(zhi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)表(biao)(biao)(biao)(biao)(biao)。 ④按(an)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路組成(cheng)形式(shi)分(fen)(fen)(fen)(fen)類(lei)：分(fen)(fen)(fen)(fen)為(wei)(wei)(wei)檢波-放(fang)(fang)大(da)(da)式(shi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)表(biao)(biao)(biao)(biao)(biao)、放(fang)(fang)大(da)(da)-檢波式(shi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)表(biao)(biao)(biao)(biao)(biao)、外差式(shi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)

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