I-capacitive pressure sensor yakhiwa izingcezu ezimbili ezihambayo (i-elastic metal diaphragm), izingcezu ezimbili ezingashintshi (insimbi enamathela engilazini ye-concave ku-diaphragm enwebekayo engaphezulu nephansi), amatheminali okukhipha kanye nezindlu, njll. Ama-capacitor amabili ochungechunge akhiwa phakathi kokuhambayo. ipuleti kanye nezingcwecwe ezimbili ezingashintshi.Lapho ukucindezela kokuthatha kusebenza ku-diaphragm enwebekayo, i-diaphragm enwebekayo ikhiqiza ukufuduka, okubophezelekile ukunciphisa ibanga ngesiqeshana esisodwa esinqunyiwe, futhi kwandise ibanga nesinye isiqeshana esingaguquki (singaboniswa ngephepha).Ibanga phakathi kwama-electrode amabili ensimbi ingenye yezinto ezibalulekile ezithinta amandla, ibanga liyakhula, i-capacitance iyancipha, ibanga liyancipha, i-capacitance iyanda.Lolu hlobo lwesakhiwo lubizwa ngokuthi isakhiwo esihlukanisayo lapho amapharamitha wezakhi ezimbili zokuzwa ashintshwa ngenani elifanayo kodwa ngokuphambene ngenxa yenani elilinganisiwe.
Uma i-diaphragm enwebekayo ibekwe phakathi kokucindezela ohlangothini nokucindezela komkhathi (i-cavity engenhla ye-diaphragm enwebekayo iwumkhathi), ukucindezela okulinganiselwe kuyitafula;Uma i-diaphragm enwebekayo ibekwe phakathi kwengcindezi eseceleni kanye ne-vacuum (i-cavity engenhla ye-diaphragm enwebekayo idlula ku-vacuum), ukucindezela okuphelele kuyalinganiswa.Umthamo we-capacitor ulingana ne-dielectric kanye nendawo yayo esebenzayo esebenzayo phakathi kwamapuleti amabili e-capacitor, futhi ngokuphambene ngokulingana nebanga phakathi kwamapuleti amabili, okungukuthi, C=ε A/ D, lapho u-ε kuyi-dielectric engaguquki. ye-dielectric, A iyindawo esebenzayo ehlobene phakathi kwama-electrode amabili ensimbi, D ibanga eliphakathi kwama-electrode amabili ensimbi.Kusukela kulobu budlelwano, kungabonakala ukuthi uma imingcele emibili ingashintshiwe futhi enye ipharamitha isetshenziswa njengokuguquguqukayo, amandla azoshintsha nepharamitha eguqukayo.
Kunezinhlobo eziningi zamasekhethi okulinganisa asetshenziswa ne-capacitive pressure sensor.Ake sithathe umjikelezo webhuloho njengesibonelo ukuze sibonise isimiso sokusebenza sesekhethi yokulinganisa inzwa yokuhlukanisa amandla.Ngenxa yokuthi i-capacitance iyipharamitha ye-AC, ibhuloho lijatshuliswa yi-AC nge-transformer.I-Transformer i-coil emibili kanye ne-capacitance yebhuloho, lapho kungekho ukucindezela kwe-inlet, ibhuloho ebhalansi, namanani amabili we-capacitance alingana no-C0, lapho umphumela wokucindezela, enye ye-capacitance value ye-C0 + delta C, enye i-capacitance value ye-C0 - delta , C (i-delta C yokucindezela kwangaphandle okubangelwa ukushintshashintsha kwamandla), ibhuloho eliphuma ebhalansini, Lapho inani le-capacitance liphezulu, i-voltage nayo iphezulu, futhi umehluko we-voltage ukhiqizwa phakathi kwama-capacitor amabili, okuvela kuwo ibhuloho lakha i-voltage ephumayo engu-U emele ingcindezi yokuthatha.
Isikhathi sokuthumela: Sep-02-2022