史芳芳外文翻译.doc

外文翻译及原文 外文原版 How Remote Controls Work Wireless?remote?control?means?to?achieve?the?objectives?of?the?charged?non-contact?remote?control,?in?industrial?control,?aerospace,?consumer?electronics?applications.?Wireless?remote?control?and?wireless?transmission?systems?with?cable?and?infrared?equipment?to?enhance?the?mobile?freedom?compared.?This?wireless?remote?control?devices?and?wireless?transmission?systems?in?industrial?applications?is?increasing.?Cable?to?connect?the?relative?advantage?of?low?installation?costs?(no?wiring,?no?underground?works,?there?is?no?cable?trough),?increased?flexibility?and?reduced?maintenance?costs.?Wireless?Remote?Control?Category?Wireless?remote?control?system?of?the?type?and?classification?of?many,?the?main?methods?are:?①?transmission?control?directives?by?the?carrier?signal?is?divided?into:?radio?remote?control,?infrared?remote?control,?ultrasonic?remote?control;?②?encoding?in?accordance?with?sub-signals:?frequency?encoding?and?pulse?code;?③?by?the?transmission?channel?is?divided?into:?single-channel?and?multi-channel?remote?control;?④?according?to?the?same?time?the?number?of?instructions?can?be?transmitted?is?divided?into:?single-channel?and?multi-channel?remote?control;?⑤?command?signals?in?accordance?with?the?objectives?of?the?control?technology?was?charged?as?follows:?switch-type?the?proportion?of?type?remote?control.?Wireless?remote?control?component?Remote?control?system?in?general?by?the?transmitter?and?the?receiver?is?composed?of?two?parts.?General?by?the?command?transmitter?key,?instruction?encoding?circuit,?modulation?circuit,?driver?circuit,?firing?circuit,?such?as?a?few?parts.?Instruction?encoding?circuit?encoding?the?instructions?to?produce?signals?encoding?instructions?to?the?carrier?modulation?signal,?and?then?carried?out?by?the?drive?circuit?power?amplifier?circuit?out?by?the?launch?after?launch?of?the?command?modulation?signal?encoding.?Receiver?general?by?the?receiving?circuit,?amplifier,?demodulator?cir