DOPPLER CEEV KOM ZOO
DOPPLER CEEV KOM ZOO
Dhau ntawm cov lej: Tsis txhob kaw qhov tseeb ntawm doppler ceev cav
Nyob rau hauv intricate dolid ntawm niaj hnub maritime navigation, qhov twg yog txhais tau tias kev nyab xeeb thiab kev ua tau zoo, DSL) sawv ua tus tseem ceeb tshaj plaws. Nws muab qhov tseem ceeb tshaj plaws hauv av (ceev dhau lub seabed) thiab feem ntau dej {liew} khiav ceev cov ntaub ntawv uas txau txoj kev kev tshawb nrhiav, thiab cov kev soj ntsuam kev tshawb fawb thiab kev tshawb fawb. Tab sis thaum peb pom tias reassuring ceev daim duab ntawm cov zaub, peb tuaj yeem ntseeg nws ntau npaum li cas? To kev to taub cov nuances ntawm doppler ceev cav raug yog qhov tseem ceeb rau tej mariner lossis tus neeg teb xov tooj cia siab rau ntawm cov thev naus laus zis.
Lub ntsiab cai tseem ceeb: suab thiab hloov
Ntawm nws lub siab, DSL ua haujlwm ntawm doppler effect. Nws kis tau nqaim, siab - zaus} cov pob zeb hauv qab (Janus kev teeb tsa) ntawm cov ntug dej lossis dej txheej. Qhov ntau zaus ntawm Echo rov qab mus rau lub transducer hloov me ntsis nyob ntawm lub nkoj ntawm kev tsa suab rau kev xav txog qhov chaw. Los ntawm kev ntsuas nrawm qhov zaus hloov pauv hauv ntau qhov kab teeb, lub hauv paus suav nrog cov aav ntev (fore / aft) thiab feem ntau hloov pauv ntawm av, thiab feem ntau hloov chaw, thiab qhov nrawm dua, nws txoj kev nrawm nrawm, nws nrawm dua hauv av.
Qhov tseeb: nws tsis yog ib tus lej
Cov neeg tsim khoom feem ntau suav cov nuj nqis uas pom tau zoo li "0.1% ntawm kev nrawm ± 0.1 pob caus" lossis zoo sib xws. Thaum cov no siv tau nyob hauv cov xwm txheej zoo tshaj plaws, tiag- ntiaj teb qhov tseeb yog ib qho nyuaj ntawm ntau yam. Xav tias nws tsis yog ib tus nqi ruaj khov, tab sis raws li ib qho kev ua haujlwm lub hnab ntawv cuam tshuam los ntawm:
1. Suab, Heave, thiab Yob: Qhov no yog kev sib cav tshaj plaws cuam tshuam rau qhov tseeb uas tseem ceeb heev. DSL xav tias lub transducer yog qib thiab ruaj khov rau lub hiav txwv. Thaum lub nkoj pitches (fore / aft motion) lossis yob (sab {}} Rhaub (ntsug suab) Tsis tas li cov kab ntev thiab tuaj yeem ua qhov yuam kev, tshwj xeeb tshaj yog tias qhov chaw taug qab yog marginal. DSLORTICORATED DSLS Cov Ntaub Ntawv Kaw Lus Siv (MRU) Cov ntaub ntawv los them rau cov teebmeem no, tab sis seem ntawm huab cua lossis ntse heev. Qhov tseeb ntawm kev ua txhaum rau qhov hnyav ntawm cov lus tsa suab.
2. Transducer installation thiab cov txheej txheem: precision tsuas yog zoo li lub installation. Lub transducer yuav tsum tau teeb pom kev ruaj ntseg zoo nkauj, ua raws li lub nkoj ua ntej- bubbles (cavitation) ntws thoob nws lub ntsej muag. Txawm tias muaj me me misalignment (piv txwv li, 0.5 degrees) tuaj yeem qhia qhov kev ua tsis ncaj ncees txawv, tshwj xeeb tshaj yog nyob hauv axis transverse. Qhov zoo tshaj ntawm lub hull nkag mus thiab ncaj ncees thaiv tsim yog qhov tseem ceeb.
3. Dej khiav thiab hauv qab chaw yog qhov:
Hauv qab khiav (ceev tshaj hauv av -? Nws qhov tseeb yog feem ntau txwv los ntawm cov nkoj suab paj nruag (raws li saum toj no) thiab qhov zoo ntawm cov hauv qab rov qab los. Cov av nkos heev, ntxhab ntxig, lossis hiav txwv tsis sib xws tuaj yeem tawg cov teeb liab thiab txo qhov raug lossis ua rau teeb liab poob.
Kev khiav dej (ceev los ntawm dej - stw): Kev ntsuas kev ntsuas ceev rau txheej txheej qhov tob. Nws qhov tseeb yog qhov ua kom qis dua hauv qab. Yam ntxwv Xws Li:
Dej loj zog: DSL ntsuas kev ntsuas ceev ceev rau cov dej loj ntawm qhov kev xaiv qhov tob. Yog tias dej ntau nws tus kheej yog txav (so, eddies), tus Stw nyeem yuav txawv ntawm lub nkoj tiag tiag los ntawm ib lub nkoj dej tsis muaj tseeb. Qhov no tsis yog qhov ntsuas yuam kev, tab sis ib qho * ntsuas yam ntxwv.
Stratification: variations hauv dej kub thiab salinity (thermoclines / Haloclines) tuaj yeem hloov lawv txoj kev thiab cov kev ntsuas tsis raug nyob hauv hom dej khiav.
Cov npuas npuas thiab cua hlob: huab cua npuas entrained ze rau lub hiav txwv uas muaj kev puas tsuaj loj lossis ze rau cov teeb meem acoustic lossis tiv thaiv kev ntsuas dej khiav.
4. Kos npe - rau - suab nrov sib piv (SNR) thiab ntau yam: lub cim qhia muaj zog, ntshiab rov qab yog qhov tseem ceeb. Nyob rau hauv cov dej tob heev (nce Dsl qhov ntau kawg), dej ntiav uas muaj kev sib tw ua kom dhau los, lossis cov teeb meem ntawm cov pa roj ntsha (plankton), SNR txo qis. Qhov no ua rau nws nyuaj rau lub kaw lus kom raug ntes ntawm lub doppler ua haujlwm, ua rau muaj suab nrov thiab muaj peev xwm lossis tsis muaj peev xwm. Tswjhwm Oppitter lub hwj chim thiab tus txais rhiab teeb yog qhov tseem ceeb.
5. Kev ntsuas thiab suab nrawm: DSL kev suav cov kev paub txog kev paub txog qhov nrawm hauv cov dej kom raug. Thaum cov niaj hnub tshuab tau muab cov suab sib xyaw ua ke (SVS), yuam kev hauv kev ntsuas no tau hais ncaj qha rau hauv cov neeg ceev xwm txheej ncaj qha. Kev ntsuas hluav taws xob tsis tu ncua khiav ntawm kev ntsuas ntsuas (feem ntau yog qhov tseem ceeb rau kev txwv thiab raug rau kev teeb tsa me me) thiab ua kom zoo dua lub suab nrov application profile.
Kev cuam tshuam ua haujlwm: Vim li cas cov teeb meem raug
Kev Nyab Xeeb: Qhov tseeb sog yog qhov tseem ceeb rau kev sib tsoo kev sib tsoo (tshwj xeeb tshaj yog nyob rau hauv Colregs), navigating brour ria, thiab docking maneuvers. Kev ua haujlwm tsis txaus ntseeg tuaj yeem ua rau muaj kev txaus ntshai li overestimating nws.
Kev ua tau zoo: Qhov tseeb Stw (tab sis te rau cov kev ua kom meej ntawm kev teeb tsa thiab drift (tam sim no cov kev npaj voyage thiab roj efficiency. Dynamic txoj hauj lwm (DP) kaw cia rau ntawm cov ntaub ntawv DSL hauv qab lossis cov ntaub ntawv tswj hwm; yuam kev tuaj yeem ua rau muaj cov ntaub thaiv pov tseg lossis txawm tias txoj haujlwm poob.
Kev Tshawb Fawb & Kev Ntsuam Xyuas Kev Ua Haujlwm: Hydrographic Cov Ntawv Tshawb Xyuas, Cov Yeeb Nkab, Kev Ua Si Seism, thiab cov seismic kev ua haujlwm tau txais cov ntaub ntawv kom ntseeg tau tias yog Georeferucedly. Ib koog -} theem qhov tseeb yuav tsum tau tsis yooj yim dua.
Kev Tshawb Xyuas Roj: -}}}}}}} dej noj khoom haus (SFOC), txawm tias nws cov kev txwv roj roj yuav tsum to taub.
Maximizing koj DSL qhov tseeb:
Meticulous installation: Nqis peev hauv cov kws tshaj lij kev teeb tsa nrog cov lus qhia ua ntej meej. Ua kom tau txoj kev huv huv txoj kev huv.
Kev ntsuas hluav taws xob tsis tu ncua: Ua cov calibration khiav ib ntus (as per chaw tsim khoom thiab kev ua haujlwm tsim nyog) thiab tom qab muaj peev xwm cuam tshuam los yog qhuav- docking.
Siv Daim Ntawv Them Nyiaj MRU: Nco ntsoov DSL tau raug cuam tshuam kom raug nrog lub siab - Cov lus taw qhia kev siv thiab cov nyiaj them tas.
Saib xyuas kev ua tau zoo: Ua tib zoo mloog rau teeb liab cov ntsuas pom zoo, thiab lwm yam ntawm DSL nyeem nrog tsawg kawg, lees paub GPS tus kheej qhov kev ua yuam kev).
Nkag siab txog cov qauv: paub thaum koj nyob hauv qab trav (feem ntau txhim khu kev qha rau sog) versus dej track (nkag siab txog nws cov kev txwv rau STW). Ceev faj txog kev hloov tsis siv neeg hloov pauv.
Saib xyuas lub transducer: khaws lub transducer ntsej muag kom huv si thiab dawb ntawm cov tub rog loj hlob.
Doppler ceev cav yog ib qho zoo tshaj plaws thiab indispensable twj, muab cov ntsuas kev sib tw ncaj qha ntawm kev ceev dhau hauv av. Txawm li cas los xij, nws cov lus hais raug yog qhov pib, tsis yog lav. Qhov tseeb tiag yog qhov tshwm sim tsis zoo tau cuam tshuam los ntawm lub xeev hiav txwv, kev teeb tsa zoo, dej kev mob, thiab kev ntsuas dej. Los ntawm kev nkag siab txog cov physics, cov peev txheej tsis muaj peev xwm ua tau zoo, thiab kev txij nkawm tseem ceeb, thiab cov neeg ua haujlwm muaj peev xwm rub cov DSL lub zog zoo. Nws xav tau kev hwm rau nws txoj kev nyuaj thiab ua kom muaj kev sib zog ua kom nws muab cov haujlwm muaj kev nyab xeeb thiab ua haujlwm tau zoo nyob ntawm. Kho nws tsis yog lub ntsuas hluav taws xob nrawm, tab sis raws li lub ntsej muag ntse uas tau ua tiav xav tau kev ceev tswj kom qhib nws lub peev xwm. Nco ntsoov, hauv kev tshawb fawb, paub txog cov kev txwv ntawm koj cov twj paj nruag yog tsuas yog qhov tseem ceeb li kev paub txog kev nyeem lawv tus kheej.
