Molao-motheo oa ts'ebetso le sebopeho sa sensor ea khatello ea capacitive

The capacitive khatello ea kutlo e entsoe ka likotoana tse peli tse tsamaeang (elastic tšepe diaphragm), likotoana tse peli tse tsitsitseng (tšepe barbota ka khalase concave ka holimo le ka tlaase rekere diaphragm), ditheminale dipholo le matlo, joalo-joalo tse peli letoto la lihlooho tse capacitors thehoa pakeng tsa ho falla. poleiti le lipoleiti tse peli tse tsitsitseng.Ha khatello ea ho noa e sebetsa holim'a diaphragm ea elastic, diaphragm ea elastic e hlahisa phallo, e lokelang ho fokotsa sebaka ka sengoathoana se le seng, le ho eketsa sebaka le sekhechana se seng se tsitsitseng (se ka bontšoa ka pampiri).Sebaka se pakeng tsa li-electrode tse peli tsa tšepe ke e 'ngoe ea lintlha tsa bohlokoa tse amang bokhoni, sebaka se eketseha, matla a fokotseha, sebaka se fokotseha, matla a eketseha.Mofuta ona oa sebopeho o bitsoa sebopeho sa phapang moo liparamente tsa likarolo tse peli tsa kutlo li fetoloang ka tekanyo e lekanang empa li fapane ka lebaka la bongata bo lekantsoeng.

Haeba diaphragm e phutholohileng e behoa pakeng tsa khatello ea mahlakoreng le khatello ea sepakapaka (sekoti se ka holimo sa diaphragm ea elastic ke sepakapaka), khatello e lekantsoeng ke tafole;Haeba diaphragm e otlolohileng e behoa pakeng tsa khatello e lehlakoreng le vacuum (mokoti o ka holimo oa diaphragm o phunyeletsang ka har'a vacuum), khatello e feletseng e lekanngoa.Matla a capacitor a lekana le dielectric le sebaka sa eona se sebetsang hantle pakeng tsa lipoleiti tse peli tsa capacitor, 'me ka tsela e fapaneng e lekana le sebaka se pakeng tsa lipoleiti tse peli, ke hore, C = ε A/ D, moo ε e leng "dielectric constant" ea dielectric, A ke sebaka se lekanyelitsoeng 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 li-parameter tse peli li sa fetohe 'me parameter e' ngoe e sebelisoa e le phetoho, bokhoni bo tla fetoha le parameter e fetohang.
Ho na le mefuta e mengata ea li-circuits tse lekanyang tse sebelisoang ka sensor ea khatello ea capacitive.Ha re nke potoloho ea borokho e le mohlala ho bontša molao-motheo oa ho sebetsa oa capacitance differential sensor measuring circuit.Hobane capacitance ke parameter ea AC, borokho bo khahliloe 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 litekanyetso tse peli tsa capacitance li lekana le C0, ha phello ea khatello, e 'ngoe ea boleng ba capacitance ea C0 + delta C, boleng bo bong ba capacitance ea C0 - delta. , C (delta C bakeng sa khatello ea ka ntle e bakoang ke ho fetoha ha matla), ke borokho bo tsoileng ho leka-lekana, Moo boleng ba capacitance bo leng holimo, motlakase le oona o phahame, 'me phapang ea motlakase e hlahisoa pakeng tsa li-capacitor tse peli, tseo borokho bo hlahisa tlhahiso ea voltage U e emelang khatello ea ho kena.