Muaj kev tsis sib haum xeeb hauv keeb kwm uas tau pom tseeb tias yuav nrhiav tau qhov tsis ncaj ncees lawm nyob rau hauv txhua rooj plaub, vim lawv yog raws li qhov yuam kev tsis raug. Ib qho ntawm cov no tau tshwm sim tsis ntev los no, txij li thaum tib neeg tau txais lub ntiaj teb txoj kev tso npe: uas yog qhov tseeb dua - digital compass lossis magnetic? Cov neeg nug lo lus nug no pom tseeb tias ua ib yam dab tsi tsis ncaj ncees lawm hauv tsev kawm ntawv geography zaj lus qhia…Ntawm no yog thawj qhov kev qhia meej ntawm cov lus nug: tus ncej twg koj xav mus?
Cov lus teb zoo li qhia nws tus kheej. Txawm tias pom tseeb ignoramuses los ntawm cov geography Rhiav, thaum Adrianov lub compass (tam sim no ib tug tsawg tshaj plaws, los ntawm txoj kev), ua ib tug ntaus ntawv rau orientation rau hauv av, willy-nilly kawm tau hais tias lub xiav kawg ntawm lub compass koob ib txwm taw tes rau sab qaum teb. Yog li ntawd, mus rau North Ncej. Raws li, qhov kawg liab - mus rau sab qab teb.
Logical, tab sis tsis ncaj ncees lawm. Xws li cov lus teb yuav tsim nyog, hais tias, nyob rau hauv lub xyoo pua 18th, thaum lub sphericity ntawm lub ntiaj teb twb tau ua pov thawj, tab sis tsis muaj ib tug ntawm cov kws tshawb fawb tseem tsis tau saib nws sab saum toj thiab "tawm tsam" sab. Txawm li cas los, nyob rau hauv nws cov hluas, keeb kwm ntawm lub compasstsis paub tej ncej kiag li. Nws tsuas yog qhov ntawd, pib los ntawm cov neeg Suav thaum ub, lawv pom tias rab koob hlau nplaum taw qhia nyob rau hauv ib qho kev taw qhia txhua lub sijhawm, thiab siv qhov no hauv kev taug kev hauv av thiab hauv hiav txwv. Thiab thaum lub compass tuaj rau Tebchaws Europe hauv kev thauj mus los ntawm Arabs nyob rau hauv lub xyoo pua 13th, cov thawj coj ntawm lub nkoj tau pib ceev faj txog kev siv cov tshiab - lawv ntshai tias lawv yuav raug liam tias yog kev ua khawv koob. Tab sis thaum lawv xam pom tias yog dab tsi, lub caij nyoog ntawm Great geographical discoveries pib, uas lub compass rightly nkag mus rau hauv daim ntawv teev cov loj tshaj inventions ntawm tib neeg lub siab. Thiab nyob rau hauv lub xyoo pua 19th, nrog ib tug luv luv lub sij hawm. 10 xyoo, British polar explorer John Ross thiab nws tus tub xeeb ntxwv James mus txog, raws li, sab qaum teb thiab sab qab teb sib nqus ncej ntawm lub ntiaj teb. Thiab lawv tau txiav txim siab tam sim ntawd tias lawv tsis sib haum nrog cov ncej ntawm thaj chaw.
Tom qab ntawd nws tig tawm: tsis yog li ntawd xwb - lawv kuj ya saum lub ntiaj teb saum npoo av. Qab lawv, tsis zoo li lub tshuab hluav taws xob digital, ib qho hlau nplaum yuav tsis khaws cia. Lawv qhov nruab nrab ceev ntawm kev txav yog 10 kilometers ib xyoos. Txog li peb thiab ib nrab xyoo pua, sab qaum teb hlau nplaum ncej wandered nyob rau hauv ib ncig ntawm Canada, thiab nyob rau hauv lub thib ob ib nrab ntawm lub xyoo pua xeem, mam li nco dheev, nrog ib tug "ntshai heev" ceev (hauv 2009 - 64 kilometers ib xyoos!) Rushed rau Russia., mus rau Taimyr Peninsula. Yog li tam sim no lub koob sib nqus sib nqus, yog tias koj ua raws nraim, yuav coj koj mus rau lub pob dej khov nab kuab, mus rau qhov taw tes nrog kev tswj hwm 85 degrees 54' feeb sab qaum teb thiab 147 degrees sab hnub tuaj longitude. Tam sim no peb xam nws tawm., cia peb xam seb lub tshuab hluav taws xob digital ua haujlwm li cas, nws tseem yog hluav taws xob. Tsis muaj hlau nplaum ntawm no, tau kawg,tsis xav tau. Raws li cov cim qhia los ntawm GPS lossis GLONASS satellites, lub receiver txiav txim siab nws qhov chaw, overlays cov ntaub ntawv ntawm daim phiaj sib koom ua ke ntawm daim ntawv qhia thiab tam sim ntawd qhia cov kev taw qhia mus rau sab qaum teb ntawm lub vijtsam, tab sis qhov no - twb mus rau thaj chaw ncej.
Txhua lwm yam haujlwm ntawm lub tshuab hluav taws xob yog txiav txim siab los ntawm nws lub hom phiaj. Cov kev tshaj lij tshaj plaws pab kom nteg thiab nco txog lub kaum ob txoj kev nrog ntau pua lub chaw kuaj xyuas, ntsuas qhov kev ncua deb thiab nrawm, suav cov kauj ruam ua, thiab tib lub sijhawm cov calories uas tau hlawv tib lub sijhawm. Nyob rau hauv txhua yam kev ncaj ncees, qhov no tsis yog ib tug compass, tab sis yog ib tug navigator.
Thiab ntawm no nws yog ib qho tseem ceeb kom paub meej cov lus nug ntawm lub xov tooj digital koj txhais li cas zaum ob. Txij li thaum muaj cov khoom siv uas siv biaxial magnetic resistors rau orientation rau cov ntsiab lus cardinal. Nyob rau hauv txoj cai, lawv yog tib yam classical compasss uas xyuas cov kev taw qhia mus rau tus ncej raws li lub ntiaj teb lub magnetic teb. Nrog rau tag nrho cov nram qab no. Tab sis, cov neeg nyiam ntawm cov khoom siv hluav taws xob, koj yuav ua li cas yog tias tag nrho cov tshuab no ua tsis tiav lossis tsis muaj zog? Puas yog qhov zoo qub magnetic compass tuaj yeem siv tau hauv qhov no?
