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无线电子门铃设计外文文献--第1页
WirelessCommunications
Moderncomputertechnology,industrialrevolution,theworldeconomy
fromthecapitalintotheeconomytoknowledgeeconomy.Fieldinthe
electronicworld,fromthe20thcenturyintotheeraofradiotocomputer
technologyinthe21stcenturyasthecenteroftheintelligentmoderneraof
electronicsystems.Thebasiccoreofmodernelectronicsystemsare
embeddedcomputersystems(referredtoasembeddedsystems),whilethe
microcontrolleristhemosttypicalandmostextensiveandmostpopular
embeddedsystems.
Fist,radiohascreatedgenerationsofexcellenceintheworld.
Fiftiesandsixtiesinthe20thcentury,themostrepresentativeofthe
advancedelectronic,technologyiswirelesstechnology,includingradio
broadcasting,radio,wirelesscommunications(telegraph),AmateurRadio,
radiopositioning,navigationandothertelemetry,remotecontrol,remote
technology.Earlythattheseelectronictechnologyledmanyyoungpeople
intothewonderfuldigitalworld,radioshowwasawonderfullife,the
prospectsforscienceandtechnology.Electronicsbegantoformanew
discipline.Radioelectronics,wirelesscommunicationsbegane-world
journey.Radiotechnologynotonlyasarepresentativeofadvancedscience
andtechnologyatthattime,butalsofrompopulartoprofessionalfieldsof
science,attractingtheyoungpeopleandenablethemtofindalotoffun.Ore
fromthebedsidetothesuperheterodyneradio;reportissuedfromtheradio
amateurradiostations;fromthetelephone,electricbelltotheradiocontrol
model.Becamepopularyouthradiotechnology,scienceandtechnology
educationismostpopularandmostextensivecontent.Sofar,manyofthe
oldergener
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