無中心總線型列車內(nèi)部通信系統(tǒng)的研制.pdf

1、華中科技大學(xué)碩士學(xué)位論文無中心總線型列車內(nèi)部通信系統(tǒng)的研制姓名：袁恩宇申請學(xué)位級別：碩士專業(yè)：電路與系統(tǒng)指導(dǎo)教師：謝瑞和20040430華中科技大學(xué)碩士學(xué)位論文。AbstractTelephonecommunicationisthemostwidelyemployedwaysofcommunicationintheworldTelephonecommunicationisdeeplyembeddedinpeople’slivesasth

2、enationaleconomicdependsBecauseofthespecialityofrailwaytranspormtion，telephonecommunicationdoesnotspreadwidelyinthepassengertrainsinourcountryAtpresentintercommunicationisrealizedbyinterphonesysteminmostofthepassengertra

3、insInterphonecommunicationhasmanydisadvantagessuchaSseriousnoise，badqualityofvoice，lackofpertinenceofcallingInthispaperonthebasisofconsideringthetraincommunicationenvironmentanddynamicallygrouping，thenon—central—switchin

4、gbusstructuretrainintercommunicationsystemisdeveloped，whichisusedforintercommunicationintrainsThereisaextensiontelephoneinthecrewcabinofeachcoach，andthetelephone’SaddresscorrespondstOthenumberofthecoachInadditionthereisa

5、broadcastingtelephonewhoseaddressissettO33inbroadcastingroom，butthebroadcaStingroomcanbeplacedinanycoachofthetrainThebustopologicalstructureanddistributedcontroltechnologyareadoptedinthesystem，whichdoesn’tsetthecentralsw

6、itchingandinwhichtheextensiontelephonesareindependenceofeachotherandcommunicatewitheachotherthroughasharedbusThesystemcanrealizethreecallmodeincludingsinglecall，group—callandinterrupt—call，inadditioneachextensiontelephon

7、ecallsetitsaddressbyitselfFirst，thepaperintroducesthereasonwhyitisdesignedandwhereitissuitedtObeappliedThen，howtoestablishthecommunicationmodelandhowtealizecommunicationprotocolarediscussed，allsystemsignalingsareintroduc

8、edOnthebasisofthediscussion，themaincharacteristicsandworkingprogressofthesystemareintroducedAtthesametime，theprincipleandrealizationofhardwareandsoftwarearedescribedindetail，andFinallythedesignofmulti—channelbusintercoms