




已阅读5页,还剩1页未读, 继续免费阅读
版权说明:本文档由用户提供并上传,收益归属内容提供方,若内容存在侵权,请进行举报或认领
文档简介
英文原文TheAbyssTransitSystem-JamesCameroncommissionsthemakingofrobotsforareturntotheTitanicByGaryStixAtthebeginningofthemoviethatmadeLeonardoDiCaprioamegastar,acamera-totingunmannedrobotventuredintoacavernousholeinthewreckthatsitsonthebottomoftheAtlantic,12,640feetfromthesurface.The500-poundvehicle,christenedSnoopDog,couldmoveonlyabout30feetalongalowerdeck,hamperedbyitsbulkytwo-inch-diametertetherhitchedtoasubmarinethatwaitedabove.Theamountofthrustneededtomoveitschunkyframestirredupathickcloud.“Thevehicleveryquicklysiltedouttheentireplaceandmadeimagingimpossible,”directorJamesCameronrecalls.ButtheeerievistarevealedbySnoopDogonthat1995expeditionmadeCameronhungerformore.HevowedtoreturnonedaywithtechnologythatcouldnegotiateanyplacewithintheTitanicsinterior.InthepastsixmonthstwodocumentariesoneforIMAXmovietheaterscalledGhostsoftheAbyss,theother,Expedition:Bismarck,fortheDiscoveryChanneldemonstratedthefruitsofathree-yeareffortthatCameronfinancedwith$1.8millionofhisownmoneytomakethisvisionmaterialize.Thepayoffwastwo70-poundrobots,namedafterBluesBrothersJakeandElwood,thathadthefullrunoftwooftheworldsmostfamouswrecks,theTitanicandtheBismarck,whichtheyvisitedonseparateexpeditions.ThepersonwhotookJakeandElwoodfromdreamtorobotisMikeCameron,Jamessbrother,anaerospaceengineerwhooncedesignedmissilesandwhoalsopossessesadiversebackgroundasahelicopterpilot,stuntphotographerandstuntman.(RememberthecorpseinthemovieTheAbyss,fromwhosemouthacrabemerges?)GivingtheremotelyoperatedvehiclesfreedomofmovementrequiredthattheybemuchsmallerthanSnoopDogandthatthetetherswidthbetapereddramaticallysoasnottocatchonverticalshipbeams.MikeCamerontookinspirationfromthewire-guidedtorpedoesusedbythemilitarythatcantravelformanymiles.Histeamcreatedvehiclesoperabletomorethan20,000feet(enoughtoreachasmuchas85percentoftheoceanfloor).Thedimensionsofthefrontoftherobotare16incheshighby17inchesacross,smallenoughtofitinaBdeckwindowoftheTitanic.Thebotshaveaninternalbatterysothattheydonotneedtobepoweredthroughatether.Insteadthetetherfifty-thousandthsofaninchindiametercontainsopticalfibersthatrelaycontrolsignalsfromamannedsubmersiblevehiclehoveringoutsideandthatalsosendvideoimagesintheotherdirection.Thetetherpaysoutfromtherobot,adesignthatpreventsitfromsnaggingonobjectsinthewreck.JamesCameronthoughttheprojectwouldbeastraightforwardengineeringtask,notmuchharderthandesigninganewcamerasystem.“Thisturnedouttobeawholedifferentorderofmagnitude,”hesays.“Therewasnocommercialoff-the-shelfhardwarethatwouldworkinthevehicles.Everythinghadtobebuiltfromscratch.”Iftheteamhadknownthisearlyon,headded,“wewouldnthavebothered.”Waterpressureonthecablethatcarriedtheopticalfiberscouldcreatemicroscopicbendsinthedatapipe,completelycuttingoffthecontrolsignalsfromthesubmersibles.DarkMatterinValencia,Calif.(MikeCameronscompany),hadtodeviseafluid-filledsheatharoundthefibertodisplacetheminusculeairpocketsinthecablethatcouldleadtothemicrobending.Tosaveweight,theframesimilartoamonocoquebodyofaracecarwasmadeupofsmallglasshollowspherescontainedinanepoxymatrix.Thethrustercontainedalarge-diameter,slowlyrotatingbladewithnozzlesthatdiffusedthepropulsiveflow,minimizingthechurningthatwouldotherwisedisturbthecakedsilt.Ahigh-resolutionvideocamera,alongwithaninfraredcamerafornavigation,wasplacedinthefrontofthecraftalongwiththreelight-emitting-diodearraysforfilllightingandtwoquartzhalogenlampsforspotlighting.Thewinterof2001markedacriticaljuncture.ItwassixmonthsbeforedivestotheTitaniccouldbesafelyattempted,andJameshadtodeterminewhethertoproceedorwaitanotheryear.“Mikewasreally,reallynegativeontheidea,butIdecidedtogoforit,”thedirectorsays.HefelthecouldntaffordtowaitlongerandthoughtthatafixeddeadlinewouldfocustheengineeringstaffatDarkMatter.Forhispart,Mikewascontendingwithanunendingseriesofdesignchallenges.“ItwassuchanoverwhelmingsetofproblemsthatIhadverylittleconfidencethatcertainpartswouldbesolvableinthetimewehad,”Mikesays.Afewweeksbeforethedivescommencedinthesummerof2001,therobotslithiumsulfurdioxode-basedbatteriescaughtfirewhilebeingtestedinapressuretank,destroyingwhatwastohavebeenathirdrobot.Mikewantedtodelaythedives,butJamesfoundasupplierofanothertypeoflithiumbatteryandpressedahead.Atthedivesite,JakeandElwoodtookstarringroleswiththeir2,000-foottethers,exploringforthefirsttimeinabout90yearsremotepartsoftheships,includingtheengineroom,thefiremensmesshallandthecabinsoffirst-classpassengersevenfocusinginonabowlerhat,abrassheadboardandanintact,uprightglassdecanter.Theimageslacktheresolutionandnovelqualityofthehigh-definition,three-dimensionalIMAXimages,theothermajortechnologicalinnovationofGhostsoftheAbyss.JakeandElwoodsdiscoveries,however,drawtheviewersinterestbecauseofwhattheyconveyoftheTitanicsmystique.“Youactuallyfeellikeyoureoutthereinthewreck,”Mikesays.HeremembershisbrotherpilotingtherobotswiththehelicopterstickthathadbeeninstalledintheRussiansubmersiblefromwhichtherobotswerelaunched.“Jimendedupbeingacowboypilot,”Mikesays.“HewasfarmoreaggressivewiththesystemthanIwas.”OnesceneinGhostsoftheAbyssrevealsthetensionthatsometimeseruptedbetweenthebrothers.Jamescontemplatesmovingoneoftherobotsthroughacabinwindowthatisstillpartiallyoccludedbyashardofglassthatcoulddamagethevehicleorcutthedatatether.WhenJamesdeclaresthatheisgoingtotakeJakein,moviegoerscanhearMikepleadingwithhisbrothernottodoit,ultimatelyrelentingoncethebothasnegotiatedtheopening.Thedecisiontoinstallanewtypeofbatteryatthelastminutecametohaunttheexpedition;Elwoodslithium-polymerbatteryignitedwhileinthebowelsoftheship.JamesmanipulatedtheremainingrobotintotheTitanictoperformarescueoperationbyhookingacordtothegrillofthedeadbotandtowingitout.AtthesurfaceonthedeckoftheRussianscientificvesseltheKeldysh,fromwhichthetwosubmarinescarryingJakeandElwoodtotheTitanicwerelaunchedMikerebuiltElwoodwithabackupbattery.Duringthenextdive,therobotcaughtfireagainwhileitwasstillmountedonthesubmarine,endangeringthecrew.Finally,Mikeworkedforan18-hourstretchtoadaptalead-acidgelbatteryusedfordevicesonboardthemothershipintoapowersourceforElwood,enablingtheexpeditiontocontinue.Thebots,nowfittedwithanew,nonflammablebatterythatMikedesigned,mayfindservicebeyondmotionpictures.TheU.S.NavyhasfundedDarkMattertohelpitassessthetechnologyforunderwaterrecoveryoperationsofshipsoraircraft.Thebotsalsohavepotentialforscientificexplorationofdeep-seatrenches.AftertravelingtotheTitanicandtheBismarck,theteamwentontoprobemid-Atlantichydrothermalvents,discoveringmollusksinaplacewherescientistshadneverencounteredthembefore.Asadventureaficionados,thebrothersspeculatethatadescendantofJakeandElwoodmightevenbetotedonamissiontoEuropa,oneofJupitersmoons,toinvestigatethewate
温馨提示
- 1. 本站所有资源如无特殊说明,都需要本地电脑安装OFFICE2007和PDF阅读器。图纸软件为CAD,CAXA,PROE,UG,SolidWorks等.压缩文件请下载最新的WinRAR软件解压。
- 2. 本站的文档不包含任何第三方提供的附件图纸等,如果需要附件,请联系上传者。文件的所有权益归上传用户所有。
- 3. 本站RAR压缩包中若带图纸,网页内容里面会有图纸预览,若没有图纸预览就没有图纸。
- 4. 未经权益所有人同意不得将文件中的内容挪作商业或盈利用途。
- 5. 人人文库网仅提供信息存储空间,仅对用户上传内容的表现方式做保护处理,对用户上传分享的文档内容本身不做任何修改或编辑,并不能对任何下载内容负责。
- 6. 下载文件中如有侵权或不适当内容,请与我们联系,我们立即纠正。
- 7. 本站不保证下载资源的准确性、安全性和完整性, 同时也不承担用户因使用这些下载资源对自己和他人造成任何形式的伤害或损失。
最新文档
- 自来水管道工考试试题及答案
- 自动检测自考试题及答案
- 专职安全员c考试试题及答案
- 四川安全员资料考试试题及答案
- 山西安全员b证考试试题及答案
- 2024届邗江实验中考数学猜题卷含解析
- 华东师大《言语障碍的评估与矫治》考试试卷(2套)及答案
- 中小学教师招聘考试试题及答案
- 中伦笔试题目及答案
- 2025家居智能设备购销版合同
- 通用绿色简约小清新PPT模板
- 徐汇滨江规划和出让情况专题培训课件
- 场区清表施工方案及工艺方法
- 标线首件施工总结
- 钢箱梁梁格模型(弯桥)解决方案
- 环刀法压实度自动计算程序
- 项目-杆塔1b模块司令图
- 危大工程验收记录表(模板工程)
- 天津市新版就业、劳动合同登记名册
- 甲酸钙生产工艺
- 法律诊所完整版教学ppt课件全套教程
评论
0/150
提交评论