Iyo capacitive pressure sensor inoumbwa nezvidimbu zviviri zvinofamba (elastic metal diaphragm), zvidimbu zviviri zvakagadzika (metal coating on the concave glass on the top and lower elastic diaphragm), materminals ekubuda uye dzimba, etc. Maviri akatevedzana capacitors anoumbwa pakati pekufamba. ndiro uye mahwendefa maviri akagadzika.Kana dzvinyiriro yekutora ichiita pane elastic diaphragm, iyo elastic diaphragm inoburitsa displacement, inosungirwa kudzikisa chinhambwe nechidimbu chakamisikidzwa, uye kuwedzera chinhambwe neimwe chidimbu chakagadziriswa (chinogona kuratidzwa nebepa).Nharaunda pakati pemagetsi maviri esimbi ndeimwe yezvinhu zvakakosha zvinokanganisa capacitance, kureba kunowedzera, capacitance inoderera, chinhambwe chinoderera, capacitance inowedzera.Maumbirwo erudzi urwu anodaidzwa kunzi differential structure umo maparameter ezvikamu zviviri zvinonzwa anochinjwa nechiyero chimwechete asi chakapesana nekuda kwehuwandu hwakayerwa.
Kana iyo elastic diaphragm yakaiswa pakati pekumanikidza kweparutivi uye kumanikidzwa kwemhepo (yepamusoro mhango ye elastic diaphragm iri mumhepo), iyo yakayerwa kudzvanywa ndiyo tafura;Kana iyo elastic diaphragm yakaiswa pakati pekumanikidza kweparutivi uye vacuum (yepamusoro mhango ye elastic diaphragm inopfuura nepavacuum), iyo yakazara dhizaini inoyerwa.Kugona kwe capacitor kunoenderana ne dielectric nenzvimbo yayo inoshanda pakati pemahwendefa maviri e capacitor, uye inversely proportional kusvika kure pakati pemahwendefa maviri, kureva, C = ε A/ D, apo ε ndiyo dielectric inogara. ye dielectric, A inzvimbo inoshanda pakati pemagetsi maviri esimbi, D chinhambwe chiri pakati pemasimbi maviri emagetsi.Kubva pahukama uhwu, zvinogona kuonekwa kuti kana maviri eparameter asina kuchinjwa uye imwe parameter inoshandiswa sechinhu chinoshanduka, capacitance ichachinja nekuchinja kweparameter.
Kune akawanda marudzi ekuyeresa maseketi anoshandiswa necapacitive pressure sensor.Ngatitorei bhiriji redunhu semuenzaniso kuratidza iyo inoshanda musimboti weiyo capacitance differential sensor measuring circuit.Nekuti iyo capacitance ndeye AC parameter, bhiriji rinonakidzwa neAC kuburikidza neshanduko.Transformer maviri coil uye capacitance yebhiriji, kana pasina inlet pressure, bhiriji mukuenzanisa, uye maviri capacitance maitiro akaenzana neC0, apo simba rekuita, imwe ye capacitance value yeC0 + delta C, imwe capacitance value yeC0 - delta. , C (delta C yekumanikidza kwekunze kunokonzerwa nekusiyana kwe capacitance), ibhiriji kunze kwechiyero, Ipo capacitance kukosha kwakakwira, voltage yakakwira zvakare, uye musiyano wevoltage unogadzirwa pakati pemacapacitor maviri, kubva kunobva bhiriji rinogadzira voltage inobuda U inomiririra kudzvanywa kwekutora.
Nguva yekutumira: Sep-02-2022