无线遥控器怎样工作外文翻译.docx

无线遥控器怎样工作外文翻译.docx

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无线遥控器怎样工作外文翻译

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外文翻译及原文

外文原版

HowRemoteControlsWork

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 circuits, instruction decoder circuit, drive circuit and the implementation of the circuit composed of several parts. Transmitter receiver circuits will be launched by the coding instructions have been modulated down signal reception and demodulation circuit made major evacuation. Demodulation circuit demodulator will be transferred down the development of coding, that is, to restore the signal for the encoding. Encoding instruction decoder for decoding command signals, and finally by the drive circuit to drive the implementation of circuit operation to achieve a variety of commands. 

Wireless Remote Control Applications 

The use of infrared technology to launch non-visible light systems and wireless communications systems have obvious shortcomings:

 On the one hand, in the transmitter and the receiver can not be obstacles between, on the other hand, the effective range was limited. 

For the use of cables or infra-red remote control system, in the receiver's direction and distance have greater restrictions. On the other hand, wireless remote control system can provide the best freedom of movement. 

Now through the application of the most advanced wireless data transmission technology can be removed from the design and installation of complicated work. Industry data can be two-way wireless modem to transmit digital, analog, serial and CAN data transmission distance can reach 300m. The data transmission of wireless data modems and 433Hz in the DECT based on the. Can be used to fine-tune control device to achieve fast and flexible to meet the specific requirements of client applications. Complete configuration of the wireless modem can achieve flexible and secure a variety of different applications in many fields of data transfer tasks. 

Wireless remote control systems and wireless data transmission system in the industrial sector and the industrial environment has an increasing number of applications possible. Area in plant utilities such as industrial doors, door-shaped frame, lift cabinets, lighting and control platform. In industry, such as machine control, device control, transfer device, press control, ground and air delivery systems, such as dynamic storage. In the construction and road construction and agriculture can also be a wireless remote control system can work more smoothly

IntroductiontoHowRemoteControlsWork

Theworld'sfirstremotecontrolswereradio-frequencydevicesthatdirectedGermannavalvesselstocrashintoAlliedboatsduringWWI.InWWII,remotecontrolsdetonatedbombsforthefirsttime.Theendofthegreatwarsleftscientistswithabrillianttechnologyandnowheretoapplyit.Sixtyyearslater,someofusspendanhourlookingfortheremotebeforeweremembertherearebuttonsontheTV.Inthisarticle,we'llexaminetheinfraredtechnologyusedinmosthometheaters,lookatthedifferencebetweenIRandRFremotes,findoutthedifferencebetweena"universal"anda"learning"remoteandcheckoutsomeoftheotherhigh-techfeaturesyoucanfindonremotestoday,likePCconnectivity,RFextendersandmacrocommands.

InfraredRemoteControls:

TheProcess

Pushingabuttononaremotecontrolsetsinmotionaseriesofeventsthatcausesthecontrolleddevicetocarryoutacommand.Theprocessworkssomethinglikethis:

1.Youpushthe"volumeup"buttononyourremotecontrol,causingittotouchthecontactbeneathitandcompletethe"volumeup"circuitonthecircuitboard.Theintegratedcircuitdetectsthis.

2.Theintegratedcircuitsendsthebinary"volumeup"commandtotheLEDatthefrontoftheremote.

3.TheLEDsendsoutaseriesoflightpulsesthatcorrespondstothebinary"volumeup"command.

Oneexampleofremote-controlcodesistheSonyControl-Sprotocol,whichisusedforSonyTVsandincludesthefollowing7-bitbinarycommands:

Button

Code

1

0000000

2

0000001

3

0000010

4

0000011

Channelup

0010000

Channeldown

0010001

Poweron

0010101

Poweroff

0101111

Volumeup

0010010

Volumedown

0010011

Source:

ARRLWeb

Theremotesignalincludesmorethanthecommandfor"volumeup,"though.Itcarriesseveralchunksofinformationtothereceivingdevice,including:

•a"start"command

•thecommandcodefor"volumeup"

•thedeviceaddress（sotheTVknowsthedataisintendedforit）、

•a"stop"command（triggeredwhenyoureleasethe"volumeup"button）

Sowhenyoupressthe"volumeup"buttononaSonyTVremote,itsendsoutaseriesofpulsesthatlookssomethinglikethis:

SonyTVremotesuseaspace-codingmethodinwhichthelengthofthespacesbetweenpulsesoflightrepresentaoneorazero.

WhentheinfraredreceiverontheTVpicksupthesignalfromtheremoteandverifiesfromtheaddress

codethatit'ssupposedtocarryoutthiscommand,itconvertsthelightpulsesbackintotheelectricalsignalfor0010010.Itthenpassesthissignaltothemicroprocessor,whichgoesaboutincreasingthevolume.The"stop"commandtellsthemicroprocessoritcanstopincreasingthevolume.

Infraredremotecontrolsworkwellenoughtohavestuckaroundfor25years,buttheydohavesomelimitationsrelatedtothenatureofinfraredlight.First,infraredremoteshavearangeofonlyabout30feet（10meters）,andtheyrequireline-of-sight.Thismeanstheinfraredsignalwon'ttransmitthroughwallsoraroundcorners--youneedastraightlinetothedeviceyou'retryingtocontrol.Also,infraredlightissoubiquitousthatinterferencecanbeaproblemwithIRremotes.Justafeweverydayinfrared-lightsourcesincludesunlight,fluorescentbulbsandthehumanbody.Toavoidinterferencecausedbyothersourcesofinfraredlight,theinfraredreceiveronaTVonlyrespondstoaparticularwavelengthofinfraredlight,usually980nanometers.Therearefiltersonthereceiverthatblockoutlightatotherwavelengths.Still,sunlightcanconfusethereceiverbecauseitcontainsinfraredlightatthe980-nmwavelength.Toaddressthisissue,thelightfromanIRremotecontrolistypicallymodulatedtoafrequencynotpresentinsunlight,andthereceiveronlyrespondsto980-nmlightmodulatedtothatfrequency.Thesystemdoesn'tworkperfectly,butitdoescutdownagreatdealoninterference.

Whileinfraredremotesarethedominanttechnologyinhome-theaterapplications,thereareotherniche-specificremotesthatworkonradiowavesinsteadoflightwaves.Ifyouhaveagarage-dooropener,forinstance,youhaveanRFremote.

Remote-controlFeatures

Today'shome-theaterremotesdoalotmorethanturnacomponentonandoffandcontrolthevolume.Herearejustahandfulofthefeaturesyoucanfindonsomeofthehigher-techremotecontrolsoutthere.

Universalcapabilities

Differentelectronicsbrandsusedifferentcommandcodes.SomeIRremotesarepreprogrammedwithmorethanonemanufacturer'scommandcodessotheycanoperatemultipledevices（sometimesupto15）ofdifferentbrands.Ifyourhome-theatersetupincorporatescomponentsfrom,say,threedifferentmanufacturers,youcaneitherusethreedifferentremotestooperateyoursystemoruseoneuniversalremote.Toaddfunctionstoauniversalremote,youneedtoknowthecommandcodesforthecomponentyouwanttocontrol.Youcanlooktheseuponlineorfindtheminthemanualthatcamewithyourremote.

Learning

Alearningremotecanreceiveandstorecodestransmittedbyanotherremotecontrol;itcanthentransmitthosecodestocontrolthedevicethatunderstandsthem.Forinstance,let'ssayyouhaveareceiverwithitsownpreprogrammedremote,andyoubuyanewTVthatcomeswithauniversallearningremote.Thelearningremotecanpickupthesignalsyourreceiverremotesendsoutandrememberthemsoitcancontrolyourreceiver,too.Youdon'tneedtoinputthecommandcodesyourself--alearni