電dian源yuan引yin入ru的de幹gan擾rao工gong業ye計ji算suan機ji係xi統tong由you電dian網wang供gong電dian
，因yin電dian網wang會hui遭zao受shou所suo有you電dian磁ci波bo的de幹gan擾rao而er在zai線xian路lu上shang感gan應ying電dian壓ya和he電dian流liu，特te別bie是shi電dian網wang內nei部bu的de變bian化hua，如ru開kai關guan操cao作zuo浪lang湧yong等deng，都dou通tong過guo輸shu電dian線xian路lu傳chuan入ru電dian源yuan原yuan邊bian，造zao成cheng控kong製zhi係xi統tong的de故gu障zhang。

接jie地di混hun亂luan引yin入ru的de幹gan擾rao由you於yu大da地di電dian位wei分fen布bu不bu均jun，不bu同tong的de接jie地di點dian存cun在zai地di電dian位wei差cha，接jie地di混hun亂luan可ke能neng產chan生sheng地di環huan路lu電dian流liu。接jie地di的de目mu的de是shi消xiao除chu幹gan擾rao
，可ke一yi旦dan形xing成cheng地di環huan流liu係xi統tong
，則ze會hui引yin入ru幹gan擾rao。為wei屏ping蔽bi層ceng兩liang端duan接jie地di情qing況kuang，信xin號hao源yuan為wei在zai現xian場chang的de儀yi表biao
，接jie收shou儀yi表biao為wei控kong製zhi室shi內nei儀yi表biao，兩liang儀yi表biao用yong帶dai屏ping蔽bi層ceng的de電dian纜lan連lian接jie
，且qie屏ping蔽bi層ceng兩liang端duan接jie地di
，由you於yuA點和B點存在電位差，如A>B，則在屏蔽層上形成地環流，從而幹擾信號源。因此，信號的屏蔽層應單端接地，一般在控製室側。

隔離信號線的隔離方式主要有兩種：①所有信號線避免接觸引入的幹擾；②helipeixian，xinhaoxianjinliangbikaiganraoyuan。dangdonglixianhexinhaoxianpingxingfusheshi，liangzhebixubaochiyidingdejianju。fushexinhaoxianchuanguanshibutongdexinhaoyingfenguanfushe，zaicaiyongjinshuqiaojiafusheshi，butongxinhaofuzhidaoxian、dianlanyudianyuanxianxuyongjinshubangekai。tongyiduoxindianlanneibuyiyoubutongfuzhidexinhaoxian。yibiaopanhoudebenanhuiludaoxianyingyufeibenanhuiludaoxianfenhuixiancaopeixian。

屏(ping)蔽(bi)信(xin)號(hao)線(xian)采(cai)用(yong)帶(dai)有(you)絕(jue)緣(yuan)護(hu)套(tao)的(de)金(jin)屬(shu)屏(ping)蔽(bi)層(ceng)屏(ping)蔽(bi)，這(zhe)種(zhong)方(fang)法(fa)對(dui)抑(yi)製(zhi)電(dian)容(rong)性(xing)噪(zao)聲(sheng)耦(ou)合(he)特(te)別(bie)有(you)效(xiao)。由(you)於(yu)屏(ping)蔽(bi)層(ceng)接(jie)地(di)，屏(ping)蔽(bi)層(ceng)上(shang)產(chan)生(sheng)的(de)各(ge)種(zhong)幹(gan)擾(rao)電(dian)壓(ya)（如導線間的幹擾電壓，各種電場、磁場輻射產生的幹擾電壓）近jin似si為wei零ling，切qie斷duan了le耦ou合he通tong道dao，阻zu止zhi了le幹gan擾rao源yuan。另ling外wai
，現xian場chang的de信xin號hao線xian特te別bie是shi長chang距ju離li架jia空kong的de線xian路lu要yao裝zhuang入ru金jin屬shu橋qiao架jia或huo穿chuan管guan敷fu設she，金jin屬shu橋qiao架jia和he穿chuan線xian管guan可ke靠kao接jie地di
，在zai一yi定ding程cheng度du上shang也ye能neng起qi到dao屏ping蔽bi作zuo用yong。

絞線用雙絞線代替兩根平行導線是抑製磁場幹擾的有效方法。采用性能優良的隔離電源抑製電網引入的幹擾在生產中，一般采用UPS對計算機、變送器和檢測係統供電。UPS一(yi)方(fang)麵(mian)可(ke)以(yi)連(lian)續(xu)供(gong)電(dian)，另(ling)一(yi)方(fang)麵(mian)具(ju)有(you)較(jiao)強(qiang)的(de)幹(gan)擾(rao)隔(ge)離(li)性(xing)能(neng)。合(he)理(li)可(ke)靠(kao)的(de)接(jie)地(di)完(wan)善(shan)可(ke)靠(kao)的(de)接(jie)地(di)係(xi)統(tong)是(shi)控(kong)製(zhi)係(xi)統(tong)抗(kang)幹(gan)擾(rao)的(de)重(zhong)要(yao)措(cuo)施(shi)之(zhi)一(yi)。接(jie)地(di)本(ben)身(shen)非(fei)常(chang)複(fu)雜(za)，如(ru)果(guo)在(zai)工(gong)程(cheng)安(an)裝(zhuang)中(zhong)沒(mei)有(you)設(she)置(zhi)好(hao)接(jie)地(di)係(xi)統(tong)
，那(na)麼(me)其(qi)他(ta)抗(kang)幹(gan)擾(rao)措(cuo)施(shi)往(wang)往(wang)起(qi)不(bu)到(dao)作(zuo)用(yong)。

tidefangshi，fangzhijieditifashengguzhangshibaohujiedidedidianliuyingxianggongzuoxitongzhengchanggongzuo。zengyouzheyangdeshili，moudianjiefenchangturanfaxiandanjilizimogongxuhenduoyibiaodianbuzhengchang
，liansuotingche。http://98fo.cn