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总线干扰困恼你?看看这些会忽略的原因

作者:admin 发布日期:2019/3/31 关注次数: 二维码分享

CANSHIKONGZHIQIJUYUWANGLUO(Controller Area Network, CAN)DEJIANCHENG,SHIYOUYIYANFAHESHENGCHANQICHEDIANZICHANPINZHUCHENGDEDEGUOBOSCHGONGSIKAIFADE,BINGCHENGWEIGUOJIBIAOZHUN(ISO 11898),SHIGUOJISHANGYINGYONGGUANGFANDEXIANCHANGZONGXIANZHIYI。

ZAIBEIMEIHEXIOU,CANZONGXIANXIEYIYIJINGCHENGWEIQICHEJISUANJIKONGZHIXITONGHEQIANRUSHIGONGYEKONGZHIJUYUWANGDEBIAOZHUNZONGXIAN,BINGQIEYONGYOUYICANWEIDICENGXIEYIZHUANWEIDAXINGHUOCHEHEZHONGGONGJIXIECHELIANGSHEJIDEJ1939XIEYI。

YI、DINGWEIGANRAOYUANYIN

DANGZONGXIANYOUGANRAOSHI,YOUJINGYANDEGONGCHENGSHINENGGOUXUNSUDINGWEI,DANSHIDUIYUXINSHOULAISHUOQUEHENMAFAN,ZAOCHENGZONGXIANGANRAODEYUANYINYOUHENDUO。BIRUTONGGUODIANCIFUSHEOUHEDAOTONGXUNDIANLANZHONG、PINGBIXIANJIEDIMEICHULIHAO、GELILETONGXUNMEIYOUGELIDIANYUANDENG。

TONGGUOXIATUWOMENKEYITUIDAOCHU,XIANCHANGDEGANRAOBUSHITONGGUODIANCIFUSHEJINLAI,ZHENGCHEDEWANGLUOYEMEIYOUGANRAO,JIBENKEYIDUANDINGGANRAOJIUSHIDIANJIQUDONGQIDECANTONGXUNMEIGELIHAO。


TU2DINGWEIGANRAOYUANYIN

ER、XIAOCHUYANSHIWUCHADEFANGFA

l  WEILEJIANXIAOYANSHI,ZENGJIATONGXUNJULIHEJIANGDITONGXUNCUOWULV,WOMENKEYICAIQUYIXIACUOSHI:

l  CAIYONGCIGELIDECTM1051FANGANSHEJIJIEKOUSHOUFADIANLU;

l  YONGJIAOCUDEDAOXIANDAITIXIDAOXIAN,BIAOZHUNWEI1.5XIANLAN(YANCHIWEI5ns/m);

l  SHIYONGDUJINHUODUYINDEXIANLAN;

l  ZENGJIAWANGQIAOZHONGJISHEBEICANBridgeYANZHANGTONGXUNJULI。

l  CAIYONGGUANGXIANCHUANSHU,RUZHIYUANDIANZIDECANHUB-AF1S1,TONGDENGBOTELVKEYANZHANG1BEITONGXUNJULI。

SAN、XINHAODI(CAN-GND)

1.XINHAODIGAINIAN

XINHAODIYECHENGWEIGELIDI,WEISHIDIANZISHEBEIGONGZUOSHIYOUYIGETONGYIDECANKAODIANWEI,BIMIANYOUHAIDIANCICHANGDEGANRAO,SHISHEBEIWENDINGKEKAODEGONGZUO,SHEBEIZHONGDEXINHAODIANLUTONGYICANKAODI,JICAN-GND。

2.XINHAODICHULI

XUDUOSHIJIYINGYONGZHONG,SHEJIZHECHANGZHIJIEJIANGMEIGEJIEDIANDECANKAODIJIEYUBENDIDEDADI,ZUOWEIXINHAODEFANHUIDI,KANSIZHENGCHANGKEKAODEZUOFA,QUECUNZAIJIDADEYINHUAN!

XINHAODI(CAN-GND)ZHENGQUEDEJIEFAZHUYAOFENWEILIANGZHONG:

DANPINGBICENGXIANLAN:RUGUOXIANLANSHIDANPINGBICENG,XINHAODILIXIANGJIEFASHISHIYONGZHUANMENDEXINHAOXIANJIANGSUOYOUJIEDIANXINHAODILIANJIE,QIDAOCANKAODIDEZUOYONG。DANRUGUOQUESHAOXINHAODIXIAN,YIKEJIANGSUOYOUJIEDIANXINHAODIDOULIANJIEDAOPINGBICENG,DANZHEIYANGPINGBIXIAOGUOYICHAQIANGRENYI。

图3 带有屏蔽层双绞线
图4 含信号地线双绞线连接方式

TU5 XINHAODIYUPINGBICENGLIANJIEFANGSHI

双屏蔽层线缆:当使用双层屏蔽电缆时,需要将所有节点信号地连接到内屏蔽层,若使用非屏蔽线进行数据传输时,请保持信号地管脚悬空处理。

图6 双屏蔽层信号地处理方式

SUOYOUJIEDIANXINHAODIJIEDAOPINGBICENGHUOZHESHUANGPINGBICENGDENEICENGHOU,PINGBICENGCHULIFANGSHIZHUYIWEIDANDIANJIEDI,BUKEDUODIANJIEDI,FOUZEHUIZAIXINHAODIXIANSHANGXINGCHENGDIHUANLIU。

LINGWAI,DANDIANJIEDISHIWEILEJIADAGONGDIANDIHEXINHAODIZHIJIANDEGELIDIANZU,ZUZHIGONGDIZUKANGDIANLUOUHECHANSHENGDEDIANCIGANRAO,ZHUYICAIYONGGELIFUDISHEJI,TONGGUOZURONGFANGSHIJIANGPINGBICENGYUWAIQIAOGELI。


TU7 WEIJINXINGDANDIANJIEDICHULIDEBAOWENSHOUDAODIANCIGANRAO

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