Sensor ea khatello ea capacitive e entsoe ka likotoana tse peli tse tsamaeang (diaphragm ea tšepe ea elastic), likotoana tse peli tse tsitsitseng (sekoahelo sa tšepe khalaseng e kobehileng holim'a diaphragm e phahameng le e tlase ea elastic), li-terminal tsa tlhahiso le ntlo, jj. Li-capacitor tse peli tsa letoto li thehoa pakeng tsa poleiti e tsamaeang le lipoleiti tse peli tse tsitsitseng. Ha khatello ea ho kenella e sebetsa holim'a diaphragm e boreleli, diaphragm e boreleli e hlahisa ho falla, e tlamang ho fokotsa sebaka ka karolo e le 'ngoe e tsitsitseng, le ho eketsa sebaka ka karolo e 'ngoe e tsitsitseng (e ka bontšoa ka pampiri). Sebaka pakeng tsa li-electrode tse peli tsa tšepe ke e 'ngoe ea lintlha tsa bohlokoa tse amang capacitance, sebaka sea eketseha, capacitance ea fokotseha, sebaka sea fokotseha, capacitance ea eketseha. Mofuta ona oa sebopeho o bitsoa sebopeho se fapaneng moo liparamente tsa likarolo tse peli tsa kutlo li fetoloang ka bongata bo lekanang empa li fapane ka lebaka la bongata bo lekantsoeng.
Haeba diaphragm e tenyetsehang e beoa pakeng tsa khatello ea lehlakore le khatello ea sepakapaka (sekoti se kaholimo sa diaphragm e tenyetsehang ke sa sepakapaka), khatello e lekantsoeng ke tafole; Haeba diaphragm e tenyetsehang e beoa pakeng tsa khatello ea lehlakore le vacuum (sekoti se kaholimo sa diaphragm e tenyetsehang se feta ka vacuum), khatello e felletseng ea lekanyetsoa. Bokhoni ba capacitor bo lekana le dielectric le sebaka sa eona se sebetsang pakeng tsa lipoleiti tse peli tsa capacitor, 'me bo lekana ka tsela e fapaneng le sebaka se pakeng tsa lipoleiti tse peli, ke hore, C=ε A/ D, moo ε e leng kamehla ea dielectric ea dielectric, A ke sebaka se sebetsang pakeng tsa li-electrode tse peli tsa tšepe, D ke sebaka se pakeng tsa li-electrode tse peli tsa tšepe. Ho tsoa kamanong ena, ho ka bonoa hore ha liparamente tse peli li sa fetohe 'me paramethara e' ngoe e sebelisoa e le phetoho, capacitance e tla fetoha ka paramethara e fetohang.
Ho na le mefuta e mengata ea lipotoloho tsa ho lekanya tse sebelisoang ka sensor ea khatello ea capacitive. A re nke potoloho ea borokho e le mohlala ho bontša molao-motheo oa ts'ebetso oa potoloho ea ho lekanya ea sensor ea capacitance differential. Hobane capacitance ke paramethara ea AC, borokho bo tsosoa ke AC ka transformer. Transformer coil tse peli le capacitance ea borokho, ha ho se na khatello ea ho kena, borokho bo leka-lekaneng, le boleng ba capacitance tse peli li lekana le C0, ha phello ea khatello, e 'ngoe ea boleng ba capacitance ea C0 + delta C, boleng bo bong ba capacitance ba C0 - delta, C (delta C bakeng sa khatello ea kantle e bakoang ke phetoho ea capacitance), ke borokho bo sa leka-lekaneng, Moo boleng ba capacitance bo phahameng, motlakase le oona o phahame, 'me phapang ea voltage e hlahisoa pakeng tsa li-capacitor tse peli, tseo ho tsona borokho bo hlahisang tlhahiso ea voltage U e emelang khatello ea ho kena.
Nako ea poso: Loetse-02-2022