Inokodzera Cummins L10 N14 M11 oiri pressure sensor 4921485

Capacitive chinzvimbo sensor

1.Capacitive position sensor is an non-contact position sensor, iyo inowanzova nezvikamu zvitatu: nzvimbo yekucherechedza, nzvimbo yekudzivirira uye shell. Vanogona kuyera nzvimbo chaiyo yechinangwa, asi chinhu chete. Kana chinhu chakayerwa chisiri conductive, chichiri kubatsira kuyera ukobvu kana density.

2.Pakuyera chinhu chinoitisa, chiratidzo chinobuda hachina chekuita nechinhu chechinhu, nekuti kune capacitive displacement sensor, vese conductors vane electrode yakafanana. Iri rudzi rwe sensor inonyanya kushandiswa mu disk drive, semiconductor tekinoroji uye yakakwirira-chaiyo indasitiri kuyerwa, asi inoda yakanyanya kurongeka uye frequency mhinduro. Kana yakashandiswa kuyera vasiri-conductor, capacitive position sensors inowanzo shandiswa kuona mavara, machira uye kuyera ukobvu hwepepa kana firimu.

3.Capacitive position sensor yakatanga kushandiswa kuyera mutsara wekufamba kure, kubva pamamirimita akawanda kusvika kune nanometers akawanda, uye kuyerwa kwakapedzwa nekushandisa maitiro emagetsi ekugadzirisa. Kugona kwechinhu kuchengeta charge kunonzi capacitance. A common capacitor mudziyo wekubhadharisa kuchengetedza iplate capacitor. Iko capacitance yeplate capacitor yakanyatsoenderana ne electrode area uye dielectric constant, uye inversely proportional kusvika kure pakati pe electrode. Nokudaro, kana chinhambwe chiri pakati pema electrodes chichichinja, capacitance inoshandukawo. Mune izwi, capacitive chinzvimbo sensor inoshandisa iyi hunhu kupedzisa kuona chinzvimbo.

4.A common capacitive position sensor inosanganisira maviri emagetsi emagetsi, ane mweya se dielectric. Imwe electrode ye sensor isimbi yesimbi, uye imwe electrode ye capacitor inoumbwa nechinhu chinoitisa kuti chionekwe. Kana magetsi akaiswa pakati pemapurati e-conductor, munda wemagetsi unotangwa pakati pemahwendefa, uye mahwendefa maviri anochengetedza mhosva dzakanaka uye mhosva dzisina kunaka maererano. Capacitive position sensor inowanzo tora AC voltage, iyo inoita kuti chaja iri pandiro ichinje polarity nguva nenguva, saka shanduko yenzvimbo inotangwa inogona kuonekwa nekuyera capacitance pakati pemahwendefa maviri.

5.The capacitance inotarirwa nekureba pakati pemahwendefa, dielectric constant ye dielectric uye kureba pakati pemahwendefa. Mumasensa akawanda, nzvimbo uye dielectric nguva dzose ye electrode plate haizoshanduki, chete chinhambwe chichakanganisa capacitance pakati pe electrode uye chinangwa chechinhu. Nokudaro, shanduko ye capacitance inogona kuratidza nzvimbo yakatarisa. Kuburikidza necalibration, iyo inobuda voltage siginecha ye sensor ine hukama hwemutsara nenhambwe pakati peinoona bhodhi uye chinangwa. Uku ndiko kunzwa kwe sensor. Inoratidza chiyero chekubuda kwemagetsi shanduko kune shanduko yenzvimbo. Iyo unit inowanzo 1V/micron, kureva kuti, inobuda voltage inoshandura 1V yega yega 100 microns.

6.Kana mhepo inoshandiswa panzvimbo yekuona, nzvimbo yemagetsi yakapararira ichagadzirwa pane chinhu chakaonekwa. Kuti uderedze kupindira, chidziviriro chekudzivirira chinowedzerwa. Inoshandisa simba rimwechete re electromotive kumativi ose enzvimbo yekuona kudzivirira nzvimbo yemagetsi munzvimbo yekuona kuti irege kubuda. Vafambisi kunze kwedzimwe nzvimbo dzekutsvaga vachagadzira munda wemagetsi nevhavha yekudzivirira uye haizopindirani nemagetsi emagetsi pakati pechinangwa uye nzvimbo yekuona. Pamusana pechidziviriro chekudzivirira, nzvimbo yemagetsi munzvimbo yekuona ndeye conical. Nzvimbo inofungidzirwa yendima yemagetsi inobudiswa neelectrode yekuona ndeye 30% yakakura kudarika nzvimbo yekuona. Nokudaro, nzvimbo yedhayamita yechinhu chakaonekwa inofanira kunge iine 30% yakakura kudarika nzvimbo yekuona ye sensor.