Tadisha kumkhawulo womthelela wokuguquguquka kwezinga lokushisa le-ambient ekunembeni kokulinganisa kwenkundla yegwadle.

Emkhakheni wokulinganisa ukunemba, iplatifomu yokunemba yegwadle enokuqina kwayo okuhle kakhulu, ubulukhuni obuphezulu kanye nokumelana nokugqokwa okuhle, isiphenduke isisekelo esikahle sokusekela imisebenzi eminingi yokulinganisa ukunemba okuphezulu. Kodwa-ke, ukuguquka kwezinga lokushisa ezintweni zemvelo, "njengombulali oqondile" ofihliwe ebumnyameni, kunomthelela ongenakuqhathaniswa ekulinganiseni ukunemba kweplathifomu yegwadle. Kubaluleke kakhulu ukuphenya umthelela ngokujulile ukuze uqinisekise ukunemba nokuthembeka komsebenzi wokulinganisa.

Nakuba i-granite yaziwa ngokuzinza kwayo, ayivikelekile ekushintsheni kwezinga lokushisa. Izingxenye zayo eziyinhloko ziyi-quartz, i-feldspar namanye amaminerali, azokhiqiza ukwanda kokushisa kanye ne-contraction phenomenon emazingeni okushisa ahlukene. Uma izinga lokushisa le-ambient likhuphuka, inkundla yokunemba yegwadle iyashisisa futhi inwetshiwe, futhi usayizi weplathifomu uzoshintsha kancane. Lapho izinga lokushisa lehla, lizohlehla libuyele esimweni salo sasekuqaleni. Izinguquko zosayizi ezibonakala zincane zingakhuliswa zibe izici ezibalulekile ezithinta imiphumela yokulinganisa kuzimo zokulinganisa ezinembayo.

Ukuthatha ithuluzi lokulinganisa elivamile elihambisana neplathifomu yegwadle njengesibonelo, kumsebenzi wokulinganisa ukunemba okuphezulu, izimfuneko zokunemba kokulinganisa ngokuvamile zifinyelela ileveli ye-micron noma ngaphezulu kwalokho. Kucatshangwa ukuthi ezingeni lokushisa elijwayelekile elingu-20℃, amapharamitha anobukhulu obuhlukahlukene beplathifomu asesimweni esikahle, futhi idatha enembile ingatholwa ngokulinganisa ucezu lokusebenza. Lapho izinga lokushisa le-ambient lishintshashintsha, isimo sihluke kakhulu. Ngemva kwenani elikhulu lezibalo zedatha yokuhlolwa nokuhlaziywa kwethiyori, ngaphansi kwezimo ezivamile, ukushintshashintsha kwezinga lokushisa kwemvelo okungu-1℃, ukunwetshwa komugqa noma ukufinyezwa kwenkundla yokunemba yegwadle cishe ku-5-7 ×10⁻⁶/℃. Lokhu kusho ukuthi endaweni yesikhulumi se-granite enobude obuhlangothini obuyimitha elingu-1, ubude obuhlangothini bungashintsha ngama-microns angu-5-7 uma izinga lokushisa lishintsha ngo-1 ° C. Ngokulinganisa okunembile, ukuguqulwa okunjalo kosayizi kwanele ukubangela amaphutha okulinganisa ngaphezu kobubanzi obamukelekayo.
Ngomsebenzi wokulinganisa odingwa amaleveli okunemba ahlukene, umthelela wokuguquguquka kwezinga lokushisa nawo uhlukile. Esilinganisweni esinembayo esijwayelekile, esifana nesilinganiso sosayizi wezingxenye eziwumshini, uma iphutha elivumelekile lokulinganisa lingaphakathi kwama-microns angu-±20, ngokuya ngesibalo se-coefficient engenhla, ukushintshashintsha kwezinga lokushisa kudinga ukulawulwa ngaphakathi kwebanga elingu-± 3-4 ℃, ukuze kulawulwe iphutha lokulinganisa elibangelwa ukushintsha kosayizi wenkundla ezingeni elamukelekayo. Ezindaweni ezinezidingo zokunemba okuphezulu, njengesilinganiso senqubo ye-lithography ekukhiqizeni i-semiconductor chip, iphutha livunyelwe ngaphakathi kwe-±1 micron, futhi ukushintshashintsha kwezinga lokushisa kudinga ukulawulwa ngokuqinile ngaphakathi kuka-± 0.1-0.2 ° C. Uma ukuguquka kwezinga lokushisa kudlula lo mkhawulo, ukunwetshwa okushisayo nokufinyezwa kwesilinganiso se-granite kungase kubangele ukuchezuka kwe-granite, okuyinto yesikhulumi esizothinta i-granite ukwenziwa kwe-chip.
Ukuze ubhekane nomthelela wokuguquguquka kwezinga lokushisa endaweni ekunemba kokulinganisa kweplathifomu yegwadle, izinyathelo eziningi zivame ukwamukelwa emsebenzini ongokoqobo. Isibonelo, imishini yokushisa engaguquki enembayo ephezulu ifakwe endaweni yokulinganisa ukulawula ukushintshashintsha kwezinga lokushisa ebangeni elincane kakhulu; Isinxephezelo sezinga lokushisa senziwa kudatha yokulinganisa, futhi imiphumela yokulinganisa ilungiswa nge-algorithm yesofthiwe ngokuya nge-coefficient yokwandisa okushisayo kweplathifomu kanye nezinguquko zezinga lokushisa lesikhathi sangempela. Nokho, kungakhathaliseki ukuthi yiziphi izinyathelo ezithathwayo, ukubamba okunembile komthelela wokuguquguquka kwezinga lokushisa elizungezile ekunemba kwesilinganiso seplathifomu yegwadle kuyisisekelo sokuqinisekisa umsebenzi wokulinganisa onembile nothembekile.