什麼是電磁流量計的雙、單頻勵磁

    電磁流量計用yong於yu測ce量liang水shui和he化hua學xue品pin等deng具ju有you導dao電dian性xing液ye體ti的de流liu量liang。最zui常chang用yong的de四si線xian製zhi電dian磁ci流liu量liang計ji配pei備bei專zhuan用yong的de電dian源yuan電dian纜lan，與yu用yong於yu電dian流liu輸shu出chu的de信xin號hao電dian纜lan區qu分fen開kai，從cong而er獲huo得de精jing度du好hao和he性xing能neng。與yu此ci相xiang反fan
，兩liang線xian製zhi電dian磁ci流liu量liang計ji僅jin使shi用yong一yi對dui電dian纜lan用yong於yu電dian流liu輸shu出chu和he供gong電dian。
    youyuliangxianzhijibuxuyaozhuanyongdedianyuandianlan
，yebuxuyaogongdiandanyuan，suoyianzhuangchengbenxianzhuxiajiang。raner，chuantongdeliangxianzhidianciliuliangjibingbunengmanzuguochengzidonghuaxianchangzhongduiceliangjingduhewendingxingdezuidiyaoqiu
，zaishichangzhongyizhimeiyoudedaoguangfanrenke。danshi，xuduogongsixuyaojiangdiyibiaochengben，xiwangliuliangjigongyingshangnengkaifachugaoxingnengdeliangxianzhidianciliuliangji。weilemanzuzheyangdexuqiu

，keyijiangliangxianzhidedianzaoshengjiangdidaosixianzhideshuiping
，congerhuodenengyusixianzhixiangdangdegaoceliangjingduhewendingxing。
    電磁流量計的雙頻勵磁是一種高低頻矩形波調製的勵磁方式;低頻為了提高零點的穩定性;高頻是降低介質對電極產生的極化電壓;使用這種方式，可以通過在線圈中流過具有高低各兩種頻率成分的電流產生(激勵)磁場。
    低di頻pin勵li磁ci的de穩wen定ding性xing和he高gao頻pin勵li磁ci的de噪zao聲sheng抑yi製zhi相xiang結jie合he
，使shi這zhe種zhong方fang式shi較jiao之zhi單dan頻pin勵li磁ci方fang式shi可ke以yi提ti供gong高gao的de精jing度du和he穩wen定ding性xing。濕shi度du傳chuan感gan器qi探tan頭tou，不bu鏽xiu鋼gang電dian熱re管guanPT100傳感器、鑄鋁加熱器
、加熱圈、流體電磁閥。