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phrame
除了電氣控制，還要學(xué)機械，做全能手。
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樓主  發(fā)表于: 2011-04-22 18:51
大家好 我想了解用接近開(kāi)關(guān)怎么測電機的轉速，基本的算法是怎么樣。電機的轉速在0-600之間 。plc怎么去獲取脈沖的時(shí)間從而計算轉速的。謝謝
liuhuaxing
LIUHUAXING
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1樓  發(fā)表于: 2011-04-25 12:12
真是高手如云，我個(gè)人看法，如果只測一下轉速，買(mǎi)一塊光電轉速表，要監視轉速，用接近開(kāi)關(guān)+PLC+觸摸屏，關(guān)鍵在接近開(kāi)關(guān)工作頻率，市面上的接近開(kāi)關(guān)工作頻率都不高，沒(méi)辦法，OMRON的要買(mǎi)工作頻率20KHZ以上還可以用以測轉速，

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