Tshaj li Hull: Marine Transducer Technology
Tshaj li Hull: Marine Transducer Technology
Yog hais tias koj twb tau sawv ntawm lub nkoj tus choj thiab ntsia ntawm qhov tob tob nyeem ntawv los yog ib daim duab meej sonar, koj tau pom cov khawv koob nyob ntsiag to.marine transducer.Rau feem ntau, nws tsuas yog dub, tsis muaj qhov tsis txaus ntseeg thaiv bolted rau lub cev - lub sensor tsis nco qab. Tab sis tom qab siv ntau xyoo los daws teeb meem, txhim kho, thiab saib cov chav no sib ntaus sib tua dej hiav txwv cov xwm txheej hnyav tshaj plaws, kuv tuaj yeem qhia rau koj: cov khoom siv me me no yog qhov tseem ceeb tshaj plaws, thiab feem ntau tsis to taub, feem ntau hauv lub nkoj hluav taws xob arsenal. Nws tsis yog "tus hais lus-microphone rau dej"; nws yog ib qho cuab yeej precision uas ua haujlwm ntawm ntug ntawm lub cev txwv, thiab nws qhov kev ua tau zoo txhais tau tias yuav ua li cas kom muaj kev nyab xeeb thiab muaj txiaj ntsig lub nkoj tuaj yeem taug kev.
Lub plawv ntawm qhov teeb meem: Piezoelectricity, Simplified
Nyob rau hauv lub hauv paus ntawm txhua txhua niaj hnub marine transducer yog ib pawg ntawm tshwj xeeb ceramic discs. Cov no tsis yog koj pob zeb nruab nrab. Lawv muaj qhov txawv txav hu ua piezoelectric effect. Siv lub siab - zaus hluav taws xob voltage, thiab cov siv lead ua lattice lub cev deforms - vibrating ntawm ntau lab lub sij hawm ib ob. Qhov kev vibration no thawb tawm tsam dej, tsim kom muaj lub teeb tsom ntawm ultrasonic suab tsis, zoo li tus neeg hais lus tsim suab tsis nyob hauv huab cua.
Tam sim no, thim rov qab txheej txheem. Thaum lub suab nthwv dej ntawd dhia tawm ntawm ntug hiav txwv, ntses, lossis ib qho kev cuam tshuam hauv dej, nws rov qab los thiab slams rau hauv tib lub pob zeb ceramic. Lub siab los ntawm lub suab yoj rov qab lub cev nyem lub pob zeb, tsim ib qho me me, ntsuas hluav taws xob. Qhov no yog lub teeb liab koj cov zaub txhais. Tus transducer siv kwv yees li 1% ntawm nws lub sijhawm "qhia" thiab 99% ntawm nws lub sijhawm "nrhiav" rau lub suab nrov ntawd. Nws yog qhov muag heev, siab -ceev seev cev ntawm lub zog hloov pauv, thiab txhua qhov micron ntawm qhov tsis zoo hauv cov ceramic lossis nws cov vaj tsev tuaj yeem cuam tshuam tag nrho cov kab ke.
Qhov tiag -Kev Mob Ntiaj Teb: Vim Li Cas Cov Neeg Hloov Pauv tsis ua haujlwm (thiab feem ntau tsis yog lawv qhov txhaum)
Hauv kuv qhov kev paub dhau los, kwv yees li ntawm 70% ntawm "kev hloov pauv tsis ua haujlwm" qhia los ntawm tus thawj coj thiab cov kws ua haujlwm tsis ua haujlwm txhua qhov -lawv yog qhov tshwm sim ntawm qhov hnyav marine tiag tiag thiab tib neeg saib xyuas. Cov no yog cov ntsiag to killers ntawm kev ua tau zoo uas tsis muaj daim ntawv spec tag nrho npaj koj rau:
Cavitation & Aeration: Thaum caij nkoj nrawm, lub nkoj tsim muaj cov dej ntws tawm ntawm cov dej uas muaj micro{0}} npuas. Yog hais tias koj lub transducer yog mounted heev ze rau lub kiv cua, keel, los yog ib tug strke, nws yuav zaum nyob rau hauv lub npuas da dej no. Cov hnab ris huab cua no ua raws li lub suab thaiv, cuam tshuam cov nqaj ultrasonic thiab tig qhov tob tob nyeem ntawv mus rau hauv chaotic, flickering mess. Kuv tau pom cov hlab ntsha poob tag nrho cov kev sib cuag hauv qab ntawm 15 pob tsuas yog vim tias tus neeg nruab tau xaiv qhov chaw yooj yim, tsis yog qhov zoo tshaj plaws.
Biofouling: Tus Tub Sab Nraud: Ib txheej nyias ntawm slime, barnacles, lossis seaweed loj hlob ntawm lub ntsej muag transducer tsis yog saib dab tuag xwb -nws tuaj yeem ua rau (tsis muaj zog) lub teeb liab acoustic txog li 40%. Lub suab nthwv dej yuav tsum dhau los ntawm cov khoom siv txawv teb chaws no, poob lub zog thiab pom tseeb.Ib tug transduceruas nyeem zoo kawg nkaus tom qab lub cev huv si tuaj yeem ua ze li tsis muaj txiaj ntsig hauv ib hlis hauv cov dej sov, muaj zaub mov zoo - cov dej nplua nuj. Tsis tu ncua, ceev faj tu tsis tu; nws yog qhov tsim nyog.
Thermal & Mechanical Stress: Transducers ua lub neej lim hiam. Lawv mus los ntawm lub hnub ci ntawm qhov chaw nres nkoj qhuav mus rau ze rau - khov qhov tob. Lawv tiv taus qhov kev co tsis tu ncua ntawm lub cav thiab kev poob siab ntawm nthwv dej. Sij hawm dhau mus, qhov no tuaj yeem ua rau micro- tawg hauv cov khoom siv ceramic lossis de- lamination ntawm txheej. Qhov tshwm sim? Ib tug gradual, insidious poob nyob rau hauv rhiab heev. Lub teeb liab tsis muaj zog thiab tsis muaj zog kom txog rau thaum ib hnub, nws tsuas tsis tuaj yeem "hnov" hauv qab ntxiv lawm.
Zaus: Xaiv cov cuab yeej zoo rau txoj haujlwm
Ib qho kev txiav txim siab tseem ceeb tshaj plaws, thiab ib qho feem ntau ua tsis raug, yog xaiv qhov kev khiav hauj lwm zaus. Nws yog kev lag luam classic- tawm ntawm kev nkag mus thiab pom meej.
Tsawg zaus (50kHz & hauv qab): Cov no nkag mus tob-xav txog ntau pua meters. Cov nthwv dej mus deb nrog me ntsis poob. Txawm li cas los xij, lub nqaj yog dav, thiab kev daws teeb meem tsis zoo. Nws yog qhov zoo rau kev sib sib zog nqus - hiav txwv navigation thiab qhov tob dav dav tab sis tsis tuaj yeem paub qhov txawv me me lossis nthuav dav.
Nruab Nrab Zaus (100–200kHz): Tag nrho - nyob ib ncig ntawm cov neeg ua haujlwm. Nws muaj qhov sib npaug ntawm qhov tob (feem ntau 200-300m) thiab kev daws teeb meem zoo. Qhov no yog tus qauv rau feem ntau kev lag luam nuv ntses thiab ntug hiav txwv navigation.
High Frequency (500kHz – 1MHz+): Nov yog qhov uas koj tau txais kev yees duab nthuav dav. High-ntau zaus beams yog rab chais- ntse, nthuav tawm qhov kev ntxhib los mos ntawm seabed, tus qauv ntawm cov ntses, thiab txawm tias cov khib nyiab me me. Tab sis kev lag luam tawm - tawm yog qhov hnyav: lawv tau nrawm nrawm los ntawm dej, txwv lawv qhov kev ua tau zoo rau qhov dej ntiav, ntug dej hiav txwv.
Kev teeb tsa niaj hnub ntse tsis yuam kev xaiv- nws siv ntau -band, arrayed transducers. Los ntawm kev sib txuas ntau lub ntsiab lus ua haujlwm ntawm ntau zaus, koj tau txais qhov zoo tshaj plaws ntawm ob lub ntiaj teb: kev nkag mus tob rau kev taw qhia thiab kev daws teeb meem siab rau ze -quarters maneuvering lossis hom phiaj kev txheeb xyuas.
Yog tias koj tab tom nrhiav kev ntseeg siab, siab -kev ua tau zooMarine ultrasonic transducersuas sawv ntsug rau dej hiav txwv txoj kev sib tw nyuaj tshaj plaws - txhawb nqa los ntawm ntau xyoo ntawm kev txawj ntse - saib tsis muaj ntxiv lawm. Peb tau mob siab rau kev tshawb fawb, kev tsim kho, thiab kev tsim khoom ntawmultrasonic transducersrau ntau tshaj 20 xyoo, nqa cov kev paub tob tob thiab txhais tes- ntawm kev paub txog kev lag luam rau txhua yam khoom peb tsim. Txawm hais tias koj xav tau cov kev cai daws teeb meem raws li koj cov kev xav tau ntawm lub nkoj tshwj xeeb lossis cov qauv qauv uas ua rau muaj kev ua tau zoo, peb pab neeg nyob ntawm no los pab. Hu rau peb hnub no los tham txog koj cov kev xav tau thiab nrhiav qhov zoo tshaj plawstransducerkev daws teeb meem rau koj txoj haujlwm maritime.
