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HED43B040

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HED43B040

在工業(yè)自動(dòng)化控制中，經(jīng)常會(huì)遇到開關(guān)量，數(shù)字量，模擬量，離散量，脈沖量等各種概念，而人們?cè)趯?shí)際應(yīng)用中，對(duì)于這些概念又很容易混淆?，F(xiàn)將各種概念羅列如下：

1.開關(guān)量：一般指的是觸點(diǎn)的“開”與“關(guān)”的狀態(tài)，一般在計(jì)算機(jī)設(shè)備中也會(huì)用“0”或“1”來表示開關(guān)量的狀態(tài)。開關(guān)量分為有源開關(guān)量信號(hào)和無源開關(guān)量信號(hào)，有源開關(guān)量信號(hào)指的是“開”與“關(guān)”的狀態(tài)是帶電源的信號(hào)，專業(yè)叫法為躍階信號(hào)，可以理解為脈沖量，一般的都有220VAC, 110VAC,24VDC,12VDC等信號(hào)，無源開關(guān)量信號(hào)指的是“開”和“關(guān)”的狀態(tài)時(shí)不帶電源的信號(hào)，一般又稱之為干接點(diǎn)。電阻測(cè)試法為電阻0或無窮大。

備貨，備貨，降降降，火火火，火火火……

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公司名稱：廈門泰尼電氣有限公司

：小廖（銷售代表）

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傳真號(hào)碼：（麻煩備注01008收）

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2.數(shù)字量：很多人會(huì)將數(shù)字量與開關(guān)量混淆，也將其與模擬量混淆。數(shù)字量在時(shí)間和數(shù)量上都是離散的物理量，其表示的信號(hào)則為數(shù)字信號(hào)。數(shù)字量是由0和1組成的信號(hào)，經(jīng)過編碼形成有規(guī)律的信號(hào)，量化后的模擬量就是數(shù)字量

關(guān)鍵詞：ERP CAD