Koj puas tuaj yeem qhia peb ntxiv txog cov txiaj ntsig ntawm salinity ntawm cov txiaj ntsig?Puas muaj qee yam ntawm cov nyhuv capacitive ntawm ob txheej ntawm ions hauv av?
Nws yuav zoo yog tias koj tuaj yeem taw qhia kuv kom paub ntau ntxiv txog qhov no.Kuv txaus siab rau kev ntsuas cov av noo-precision siab.
Xav txog yog tias muaj ib tus neeg xyuas pib zoo nyob ib puag ncig ntawm lub sensor (piv txwv li, yog tias lub ntsuas ntsuas tau muab tso rau hauv cov kua dej gallium hlau), nws yuav txuas lub ntsuas lub ntsuas hluav taws xob rau ib leeg kom cov insulator nkaus xwb ntawm lawv yuav yog cov txheej nyias nyias ntawm cov khoom siv. Circuit Board.
Cov nqi pheej yig capacitive sensors, ua rau ntawm 555 chips, feem ntau ua haujlwm ntawm ntau zaus hauv kaum tawm kHz, uas yog tsawg dhau los tshem tawm cov cawv ntawm cov ntsev yaj.Tej zaum nws yuav tsawg txaus ua rau lwm yam teeb meem xws li dielectric nqus, uas tshwm sim nws tus kheej li hysteresis.
Nco ntsoov tias lub rooj tsavxwm sensor yog qhov tseeb capacitor nyob rau hauv series nrog cov av sib npaug Circuit Court, ib qho ntawm txhua sab.Koj tuaj yeem siv lub tshuab hluav taws xob tsis muaj hluav taws xob tsis muaj txheej txheej rau kev sib txuas ncaj qha, tab sis cov electrode yuav yaj sai sai rau hauv av.Kev siv hluav taws xob yuav ua rau polarization hauv av + dej ib puag ncig.Lub complex permittivity yog ntsuas raws li ib tug muaj nuj nqi ntawm daim ntawv thov hluav taws xob teb, yog li ntawd lub polarization ntawm cov khoom ib txwm lags qab cov ntaub ntawv hluav taws xob teb.Raws li qhov zaus ntawm daim teb thov nce mus rau qhov siab dua MHz, qhov kev xav ntawm qhov nyuaj dielectric tas li poob qis heev vim tias dipole polarization tsis ua raws li qhov siab zaus oscillations ntawm hluav taws xob teb.
Hauv qab ~ 500 MHz, qhov kev xav ntawm qhov dielectric tas li yog dominated los ntawm salinity thiab, raws li qhov tshwm sim, conductivity.Tshaj li cov zaus no, lub dipole polarization yuav txo qis heev thiab tag nrho cov dielectric tas li yuav nyob ntawm cov ntsiab lus dej.
Feem ntau cov lag luam sensors daws qhov teeb meem no los ntawm kev siv cov zaus qis dua thiab siv qhov ntsuas qhov nkhaus kom suav nrog cov av thiab zaus.
Post lub sij hawm: Jan-25-2024