Capacitive pressure sensor ndi mtundu wa sensor yamphamvu yomwe imagwiritsa ntchito mphamvu ngati chinthu chodziwikiratu kuti isinthe kupanikizika komwe kumayesedwa kukhala kusintha kwa mtengo wa capacitance.Sensa yamtunduwu nthawi zambiri imagwiritsa ntchito filimu yozungulira yachitsulo kapena filimu yopangidwa ndi golide ngati electrode ya capacitor, pamene filimuyo ikumva kupanikizika ndi kupunduka, mphamvu yomwe imapangidwa pakati pa filimuyo ndi kusintha kwa electrode yokhazikika, ndipo chizindikiro chamagetsi chikhoza kukhala. linanena bungwe ndi ubale winawake pakati voteji kudzera muyeso dera.
Capacitive pressure sensor ndi ya polar distance variation capacitive sensor, yomwe imatha kugawidwa kukhala imodzi capacitive pressure sensor ndi differential capacitive pressure sensor.
Sensa imodzi-capacitive pressure sensor imapangidwa ndi filimu yozungulira komanso electrode yokhazikika.Kanemayo amasokoneza chifukwa cha kukakamizidwa, potero amasintha mphamvu ya capacitor, ndipo kukhudzika kwake kumakhala kolingana ndi dera komanso kukakamizidwa kwa filimuyo komanso mosagwirizana ndi kupsinjika kwa filimuyo komanso mtunda kuchokera pafilimu kupita ku electrode yokhazikika. .Mtundu wina wa ma elekitirodi osasunthika ndi mawonekedwe ozungulira a concave, ndipo diaphragm ndi ndege yokhazikika yokhazikika mozungulira.The diaphragm akhoza kupangidwa ndi njira pulasitiki plating golide.Mtundu uwu ndi woyenera kuyeza kutsika kwapansi ndipo uli ndi mphamvu zambiri.Sensa imodzi ya capacitive pressure sensor imathanso kupangidwa ndi diaphragm yokhala ndi pisitoni yosuntha kuti muyeze kuthamanga kwambiri.Mtundu uwu umachepetsa kupanikizika kwachindunji kwa diaphragm kotero kuti diaphragm yochepetsetsa ingagwiritsidwe ntchito kuti ikhale yabwino.Zimaphatikizidwanso ndi magawo osiyanasiyana amalipiro ndi chitetezo ndi mabwalo okulitsa kuti apititse patsogolo luso lolimbana ndi kusokoneza.Sensa iyi ndiyoyenera kuyeza kuthamanga kwamphamvu kwambiri komanso telemetry ya ndege.Masensa amphamvu a single-capacitive akupezekanso mumtundu wa maikolofoni (ie mtundu wa maikolofoni) ndi mtundu wa stethoscope.
The pressure diaphragm electrode ya differential capacitive pressure sensor ili pakati pa ma elekitirodi awiri osasunthika kuti apange ma capacitor awiri.Pansi pa kukakamizidwa, mphamvu ya capacitor imodzi imawonjezeka ndipo ina imachepa moyenerera, ndipo zotsatira za muyeso zimatulutsidwa ndi dera losiyana.Elekitirodi yake yokhazikika imapangidwa ndi golide-wokutidwa ndi golide pamtunda wa galasi lopindika.The diaphragm imatetezedwa kuti isasweke ndi malo opindika panthawi yodzaza.Osiyana capacitive pressure sensors ali ndi chidziwitso chapamwamba komanso mzere wabwino kuposa masensa omwe ali ndi mphamvu imodzi, koma ndi ovuta kuwakonza (makamaka kuonetsetsa kuti symmetry), ndipo sangathe kukwaniritsa kudzipatula kwa gasi kapena madzi kuti ayezedwe, kotero iwo sali oyenera. pogwira ntchito m'madzi okhala ndi dzimbiri kapena zonyansa.
Nthawi yotumiza: Jun-19-2023