Keywords: Analog signals, digital signals, switch signals, mem tes signals
Hauv kev lag luam automation tswj, peb nquag ntsib cov tswv yim xws li cov teeb liab hloov, cov teeb liab digital, cov teeb liab analog, thiab cov cim mem tes. Peb yuav tsum nkag siab cov ntsiab lus no li cas?
Digital Quantity:
Ntau tus neeg tsis meej pem cov lej digital nrog cov lej hloov lossis cov lej analog. Digital quantities yog discrete lub cev muaj nuj nqis nyob rau hauv ob lub sij hawm thiab magnitude, thiab cov teeb liab lawv sawv cev yog digital signals. Cov lej digital yog cov teeb liab tsim los ntawm 0s thiab 1s, encoded rau hauv cov qauv tsis tu ncua. Analog kom muaj nuj nqis uas tau quantized dhau los ua digital quantities.
Analog Quantity:
Lub tswv yim ntawm analog quantities sib haum mus rau digital quantities, tab sis lawv muaj peev xwm hloov rov qab mus rau hauv digital quantities tom qab quantization. Analog quantities yog lub cev muaj nuj nqis uas txuas ntxiv nyob rau hauv ob lub sij hawm thiab qhov loj, thiab cov teeb liab lawv sawv cev yog analog signals. Thaum lawv qhov kev hloov pauv tas mus li, txhua tus nqi ntawm ib qho analogue sawv cev rau qhov tshwj xeeb, muaj txiaj ntsig lub cev, xws li kub, qhov hluav taws xob, lossis tam sim no.
Switching Signal:
Feem ntau yog hais txog "on" thiab "off" xeev ntawm kev sib cuag. Hauv cov cuab yeej siv computer, cov xeev no feem ntau sawv cev ua "0" lossis "1". Switching signals yog categorized rau hauv active thiab passive switching signals. Lub teeb liab hloov pauv tau hais txog lub teeb liab uas muaj zog hauv nws lub xeev 'on' lossis "tawm", technically hu ua lub teeb liab kauj ruam. Nws tuaj yeem nkag siab tias yog mem tes-zoo li cov teeb liab nqa qhov hluav taws xob xws li 220VAC, 110VAC, 24VDC, 12VDC, thiab lwm yam. Passive switch signals xa mus rau cov teeb liab uas tsis muaj hluav taws xob thaum lub sij hawm "on" thiab "tawm" xeev, feem ntau hu ua qhuav hu. Txoj kev ntsuas kev tiv thaiv yields tus nqi tsis kam ntawm xoom lossis infinite.
Pulse Quantity:
Pulse kom muaj nuj nqis yog hais txog lub teeb liab kom muaj nuj nqis uas tam sim no voltage lossis tam sim no hloov pauv sai sai ntawm ib qho nqi mus rau lwm qhov. Tom qab quantization, yog tias qhov kev hloov pauv tseem nyob rau hauv tus qauv tsis tu ncua, nws yog qhov muaj nuj nqis digital. Yog tias nws hloov los ntawm xoom mus rau tus nqi ruaj khov thiab tseem tsis hloov pauv, nws raug cais raws li qhov hloov pauv ntau.
