Ceramic Capacitive Tsis Txaus Siab Sensor

Ceramic capacitive absolute siab sensor yog ib hom sensor uas siv alumina ceramic raws li nws cov khoom tseem ceeb thiab ntsuas siab txheeb ze rau qhov tseeb lub tshuab nqus tsev siv taw tes los ntawm kev kuaj xyuas cov kev hloov pauv hauv lub peev xwm.

 

Yooj yim muab tso, nws yog "tus capacitor hloov pauv" uas ncaj qha hloov siab mus rau hauv kev hloov pauv hauv lub peev xwm, nrog rau nws cov kab lus siv tau raug kaw hauv lub tshuab nqus tsev.

Nws cov ntsiab lus tseem ceeb yog ceramic capacitive sensing core, feem ntau tsim los siv ntau- txheej co- tua hluav taws xob tshuab:

Qauv:Nws muaj cov khoom siv hluav taws xob uas muaj cov khoom siv hluav taws xob ruaj khov thiab cov yeeb yaj kiab nyias nyias (diaphragm) uas ua raws li cov khoom siv hluav taws xob txav tau, sib koom ua ke ntawm qhov kub siab siv iav frit.

Tom qab kev sib txuas, ib qho me me, hermetically kaw lub tshuab nqus tsev siv kab noj hniav yog tsim los ntawm lawv. Qhov no yog tus yuam sij kom ua tiav qhov kev ntsuas siab.

Cov qauv no tsim ib qho kev sib luag -phaj capacitor:

• Phaj 1: Cov hluav taws xob qis qis (luam tawm ntawm cov khoom siv ceramic).
• Phaj 2: Lub movable sab sauv electrode (cov ceramic diaphragm nws tus kheej, feem ntau metallized).
• Dielectric: Nqus (hauv cov kab noj hniav siv) thiab ceramic.

• Thawj lub xeev:Nyob rau hauv lub tshuab nqus tsev, lub diaphragm ceramic yog undeformed, thiab tus nqi capacitance yog tus nqi pib, C₀.
• Kev Siv Siab:Thaum lub siab sab nraud (qhov siab kawg) ua rau sab nraud ntawm lub diaphragm, lub diaphragm ua rau me ntsis khoov deformation ntawm lub tshuab nqus tsev siv kab noj hniav.
• Capacitance Hloov:Qhov deformation no ua rau qhov kev ncua deb ntawm ob daim hlau capacitor txo qis.
  Raws li qhov sib npaug ntawm - phaj capacitor mis C=εA / d (qhov twg ε yog qhov permittivity thiab A yog thaj tsam phaj txheeb ze), qhov txo qis hauv qhov kev ncua sij hawm ua rau muaj peev xwm nce C.

• Teeb liab ntsuas:Ib qho kev sib koom ua ke tom qab (feem ntau yog ASIC - Daim Ntawv Thov-Specific Integrated Circuit) kuaj xyuas qhov kev hloov pauv hauv feeb no, hloov pauv, ua kom nrov nrov, thiab ua kom nws tawm, thiab thaum kawg tso tawm cov teeb liab txheem (xws li qhov hluav taws xob lossis lub teeb liab digital) piv rau qhov siab kawg.

Cim npe nrov: Tuam Tshoj ceramic capacitive absolute siab sensor lwm tus neeg