39ACM24BEN
39ACM24BEN
綜上所述，模擬量就是在某個(gè)過程中時(shí)間和數(shù)量連續(xù)變化的物理量，由于在實(shí)際的應(yīng)用中，所有的儀器設(shè)備對(duì)于外界數(shù)據(jù)的采集都有一個(gè)采樣周期，其采集的數(shù)據(jù)只有在下一個(gè)采樣周期開始時(shí)才有變動(dòng)，采樣周期內(nèi)其數(shù)值并不隨模擬量的變化而變動(dòng)。這樣就將模擬量離散化了，例如：某設(shè)備的采樣周期為1秒，其在第五秒的時(shí)間采集的溫度為35度，而第六秒的溫度為36度，該設(shè)備就只能標(biāo)稱第五秒時(shí)間溫度35度，第六秒時(shí)間溫度36度，而第五點(diǎn)五秒的時(shí)間其標(biāo)稱也只是35度，但是其實(shí)際的模擬量是35.5度。這樣就將模擬信號(hào)離散化。其采集的數(shù)據(jù)就是離散化了，不再是連續(xù)的模擬量信號(hào)。由于計(jì)算機(jī)只識(shí)別0和1兩個(gè)信號(hào)，即開關(guān)量信號(hào)，用其來(lái)表示數(shù)值都是使用數(shù)字串來(lái)表示，由于計(jì)算能力的問題，其數(shù)字串不能無(wú)限長(zhǎng)，即其表達(dá)的精度也是有限的，同樣的以溫度為例，由于數(shù)字串限制，其表達(dá)溫度的精度只能達(dá)到0.1度，小于該單位的數(shù)值則不能被標(biāo)稱，這樣就必須將離散量進(jìn)行量化，將其變?yōu)閿?shù)字量。即35.68度的溫度則表示為35.6度。
◆ 企業(yè)名稱：廈門泰尼電氣有限公司
◆ 企業(yè)性質(zhì)： 有限責(zé)任公司
◆ 主營(yíng)業(yè)務(wù)：DCS,PLC
◆ 經(jīng)營(yíng)模式： 貿(mào)易
◆ 貿(mào)易地區(qū)： 全國(guó)
◆ ： 小廖女士）
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◆ 郵政編碼： 361026
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