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chuntao33
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樓主  發(fā)表于: 2008-10-23 20:32
大家好 我是一個(gè)初學(xué)者 用em235模塊采集模擬量時(shí)猜到的值總是在波動(dòng) 我不懂是怎么回事 如果要濾波 算法是什么 怎么處理 。我采的模擬量是用的5v直流電壓
希望各位搞收能談?wù)勥@方面的經(jīng)驗 小弟不勝感激 謝謝 不要嫌我問(wèn)的低級
cvlsam
富士低壓,POD(觸摸屏),PLC專(zhuān)賣(mài)
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1樓  發(fā)表于: 2008-10-23 20:57
一般會(huì )建議用戶(hù)首先作硬件上的抗干擾措施,如節點(diǎn)上并聯(lián)電容等。

如果使用濾波,那么一般在PLC硬件方面仍然會(huì )采用并聯(lián)電容,而在軟件上,通過(guò)多次采樣取平均值,來(lái)進(jìn)行濾波,無(wú)論何種濾波方式,都會(huì )犧牲運行時(shí)間或者采集時(shí)間。

以上~

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