Ungasixelela okungakumbi ngempembelelo yetyuwa kwiziphumo? Ngaba kukho uhlobo oluthile lwempembelelo ye-capacitive ye-double layer yee-ions emhlabeni?
Kungangcono ukuba ungandinika ulwazi oluthe kratya malunga noku. Ndinomdla wokwenza imilinganiselo yokufuma komhlaba echanekileyo.
Khawuthelekelele ukuba bekukho i-conductor egqibeleleyo ejikeleze i-sensor (umzekelo, ukuba i-sensor ibintywiliselwa kwi-gallium metal engamanzi), ibiya kudibanisa ii-capacitor plates ukuze i-insulator kuphela phakathi kwazo ibe yi-coating encinci ye-conformal kwibhodi yesekethe.
Ezi sensors zingabizi kakhulu, ezakhiwe kwiitships ezingama-555, zihlala zisebenza kumaza angamashumi e-kHz, aphantsi kakhulu ukuba angasusa impembelelo yeetyuwa ezinyibilikisiweyo. Isenokuba iphantsi ngokwaneleyo ukuba ibangele ezinye iingxaki ezifana nokufunxwa kwe-dielectric, okuzibonakalisa njenge-hysteresis.
Qaphela ukuba ibhodi yesensa ngokwenene yi-capacitor elandelelanayo enesekethe elingana nomhlaba, enye kwicala ngalinye. Ungasebenzisa ne-electrode engagqunywanga ngaphandle kokufaka i-coating ukuze uqhagamshele ngqo, kodwa i-electrode iya kunyibilika ngokukhawuleza emhlabeni.Ukusetyenziswa kwentsimi yombane kuya kubangela i-polarisation kwindawo yomhlaba + namanzi. I-complex permittivity ilinganiswa njengomsebenzi wentsimi yombane esetyenzisiweyo, ngoko ke i-polarization yezinto ezisetyenzisiweyo ihlala isemva kwentsimi yombane esetyenzisiweyo. Njengoko i-frequency yentsimi esetyenzisiweyo isanda ukuya kuluhlu oluphezulu lwe-MHz, inxalenye eqikelelweyo ye-complex dielectric constant yehla kakhulu njengoko i-dipole polarization ingasalandeli i-high-frequency oscillations yentsimi yombane.
Ngaphantsi kwe-~500 MHz, inxalenye eqikelelweyo ye-dielectric constant ilawulwa yityuwa kwaye, ngenxa yoko, i-conductivity. Ngaphezulu kwezi frequencies, i-dipole polarization iya kuncipha kakhulu kwaye i-dielectric constant iyonke iya kuxhomekeka kumxholo wamanzi.
Uninzi lwee-sensors zorhwebo zisombulula le ngxaki ngokusebenzisa amaza aphantsi kunye nokusebenzisa i-calibration curve ukuze kujongwe iimpawu zomhlaba kunye namaza.
Ixesha leposi: Jan-25-2024