Hauv lub ntiaj teb nruj ntawm ultra - Cov khoom siv ncaj qha, zoo tshaj plaws damping, thiab tsis muaj zog cua sov. Txawm li cas los xij, kev ncaj ncees ntawm cov ntsuas tau ua rau lossis nrog cov cuab yeej no yuav luag txhua yam ntawm ib qho kev tawm tsam feem ntau saib xyuas: Kev tswj qhov kub thiab txias. Peb yuav tsum nug peb tus kheej: yog peb cov lus hais tau hais txog kev ua tiav ntawm nws cov ntawv pov thawj yog tias nws ntsuas kub hloov?
Lo lus teb lus dag kom nkag siab txog qhov hloov maj mam, tseem muaj zog, cuam tshuam ntawm thermal dynamics ntawm kev ruaj khov. Thaum lub sij hawm precision granite granite boefficient ntawm thermal expansion (CTE) dua li cov hlau lossis txhuas, nws tsis yog hloov kom sov. Piv txwv li, 1000 hli mm granite saum npoo phaj yuav tsum yog 1℃kub sib txawv thoob plaws nws lub cev yuav muaj kev hloov pauv ntawm nws cov tiaj tiaj. Nyob rau hauv precision ib puag ncig qhov kev thev taus feem ntau yog ntsuas hauv microns lossis sau mic} pa, cov kab sib txawv me me no txaus kom thawb kev ntsuas tseem ceeb ntawm kev ntsuas tshwj xeeb.
Qhov kev sib tw yog ob leeg: ib puag ncig ruaj ntseg thiab thermal soak. Firstly, tag nrho cov chaw kuaj ib puag ncig ntawm kev kuaj mob yog qhov yuav tsum ua raws li ISO cov qauv, feem ntau tswj tau 20℃(± 0.5℃lossis tsawg dua). Txawm tias cov qauv sau me me, kev tshav ntuj ncaj qha, lossis qhov sib thooj ntawm cov cua sov (xws li cov neeg ua haujlwm ua kom sov, ua rau cov neeg ua haujlwm ua kom sov ib ntus Qhov thib ob, Granite, ua qhov siab- cov ntaub ntawv loj, ua rau pom kev lag luam thermal tseem ceeb (lossis 'soak'). Qhov no txhais tau tias yog tias ib feem yog tsiv los ntawm thaj chaw sov kom sov rau chav kuaj mov me me, nws tuaj yeem siv sijhawm ntau dua, nws tuaj yeem siv sijhawm ntau dua li qub, kom ua ke thiab ntsuas kub.
Rau cov tuam ntxhab tsim thiab pab pawg tsim nyog, qhov no yuav siv cov txheej txheem tswj. Cov khoom siv tau raug tshuaj xyuas yuav tsum tau muab tso rau ntawm Granite siv nto zoo nyob rau hauv ua ntej {} Tus txheej txheem hu ua thermal acclimatization. Tsis tas li ntawd, kev tswj hwm txij nkawm, xws li kev tu nrog cov kuab tshuaj yeeb dej caw, yuav tsum tau saib xyuas, kom muaj evaporation sai sai ua rau muaj kev sib txawv thiab tom qab.
Los lees paub tias kev tswj qhov kub tsis yog ib qho kev xav tau ntawm qhov chaw nyob, cov kws ua haujlwm tuaj yeem ua kom lawv muaj peev xwm siab tshaj plaws rau lawv lub peev xwm siab tshaj plaws. Qhov kev ruaj ntseg ntawm ib puag ncig metrology rau cov metrology rau cov qauv ntawm cov ntaub ntawv, txhawb txoj ntsiab cai uas nyob rau hauv precision ua haujlwm, txhua qib tseem ceeb.
