Haum rau Cummins L10 N14 M11 roj siab sensor 4921485

Capacitive txoj hauj lwm sensor

1.Capacitive txoj hauj lwm sensor yog ib qho tsis sib cuag txoj hauj lwm sensor, uas feem ntau muaj peb qhov chaw: nrhiav kom tau cheeb tsam, tiv thaiv txheej thiab plhaub. Lawv tuaj yeem ntsuas qhov tseeb ntawm lub hom phiaj, tab sis tsuas yog cov khoom. Yog tias cov khoom ntsuas tsis yog conductive, nws tseem muaj txiaj ntsig los ntsuas nws qhov tuab lossis qhov ntom ntom.

2.Thaum ntsuas cov khoom siv hluav taws xob, cov teeb liab tso tawm tsis muaj dab tsi cuam tshuam nrog cov khoom ntawm cov khoom, vim hais tias rau lub capacitive displacement sensor, tag nrho cov conductors yog tib lub electrode. Hom sensor no tsuas yog siv nyob rau hauv disk drive, semiconductor technology thiab high-precision industrial ntsuas, tab sis nws yuav tsum tau siab heev thiab zaus teb. Thaum siv los ntsuas cov khoom tsis yog tus coj, capacitive txoj hauj lwm sensors feem ntau yog siv los xyuas cov ntawv, txheej thiab ntsuas thickness ntawm daim ntawv los yog zaj duab xis.

3.Capacitive txoj hauj lwm sensor yog Ameslikas siv los ntsuas qhov kev ncua deb ntawm linear, xws li los ntawm ob peb millimeters mus rau ob peb nanometers, thiab kev ntsuas tau ua tiav los ntawm kev siv hluav taws xob cov yam ntxwv ntawm conductivity. Lub peev xwm ntawm cov khoom khaws cia yog hu ua capacitance. Ib qho khoom siv capacitor feem ntau rau kev khaws cia yog lub phaj capacitor. Lub capacitance ntawm phaj capacitor yog ncaj qha proportional rau thaj tsam electrode thiab dielectric tas li, thiab inversely proportional rau qhov kev ncua deb ntawm electrodes. Yog li ntawd, thaum qhov kev ncua deb ntawm cov electrodes hloov, lub capacitance kuj hloov. Nyob rau hauv ib lo lus, capacitive txoj hauj lwm sensor siv tus yam ntxwv no kom tiav txoj hauj lwm nrhiav kom tau.

4.A raug capacitive txoj hauj lwm sensor muaj xws li ob hlau electrodes, nrog huab cua raws li dielectric. Ib qho electrode ntawm lub sensor yog hlau phaj, thiab lwm yam electrode ntawm lub capacitor yog tsim los ntawm cov khoom siv hluav taws xob los kuaj pom. Thaum muaj hluav taws xob siv hluav taws xob nruab nrab ntawm cov phaj hluav taws xob, qhov hluav taws xob hluav taws xob yog tsim los ntawm cov phaj, thiab ob daim hlau khaws cov nqi zoo thiab cov nqi tsis zoo. Capacitive txoj hauj lwm sensor feem ntau txais AC voltage, uas ua rau tus nqi ntawm lub phaj hloov polarity tsis tu ncua, yog li qhov kev hloov ntawm lub hom phiaj txoj hauj lwm yuav raug kuaj pom los ntawm kev ntsuas lub capacitance ntawm ob daim hlau.

5.Lub capacitance yog txiav txim los ntawm qhov kev ncua deb ntawm daim hlau, lub dielectric qhov tsis tu ncua ntawm dielectric thiab qhov kev ncua deb ntawm daim hlau. Nyob rau hauv feem ntau cov sensors, thaj tsam thiab dielectric tas li ntawm electrode phaj yuav tsis hloov, tsuas yog qhov kev ncua deb yuav cuam tshuam lub capacitance ntawm lub electrode thiab lub hom phiaj khoom. Yog li ntawd, qhov kev hloov ntawm capacitance tuaj yeem pom lub hom phiaj txoj haujlwm. Los ntawm calibration, cov zis voltage teeb liab ntawm lub sensor muaj ib tug linear kev sib raug zoo nrog rau qhov kev ncua deb ntawm lub nrhiav kom tau board thiab lub hom phiaj. Qhov no yog qhov rhiab heev ntawm lub sensor. Nws qhia txog qhov piv ntawm cov zis voltage hloov mus rau txoj hauj lwm hloov. Chav tsev feem ntau yog 1V / micron, uas yog, cov zis voltage hloov 1V txhua 100 microns.

6.Thaum ib qho hluav taws xob raug siv rau qhov chaw kuaj pom, qhov hluav taws xob diffused yuav raug tsim tawm ntawm cov khoom kuaj pom. Txhawm rau txo kev cuam tshuam, ib txheej tiv thaiv ntxiv. Nws siv tib lub zog hluav taws xob ntawm ob qho kawg ntawm qhov chaw kuaj xyuas kom tsis txhob muaj hluav taws xob hauv qhov chaw kuaj pom los ntawm kev xau. Cov neeg siv hluav taws xob sab nraud lwm qhov chaw kuaj pom yuav tsim hluav taws xob nrog cov txheej txheem tiv thaiv thiab yuav tsis cuam tshuam nrog hluav taws xob ntawm lub hom phiaj thiab qhov chaw kuaj pom. Vim cov txheej txheem tiv thaiv, hluav taws xob hauv cheeb tsam tshawb pom yog conical. Qhov projected cheeb tsam ntawm lub teb hluav taws xob emitted los ntawm cov electrode detection yog 30% loj tshaj qhov nrhiav kom tau cheeb tsam. Yog li ntawd, lub cheeb tsam ntawm cov khoom kuaj pom yuav tsum yog tsawg kawg 30% loj dua qhov chaw kuaj pom ntawm lub sensor.