Ivhu Quality Sensor

Unogona here kutiudza zvimwe nezve mhedzisiro yemunyu pane zvabuda?Pane imwe mhando ye capacitive mhedzisiro yekaviri layer yeion muvhu?

Zvingave zvakanaka kana iwe ukakwanisa kundinongedzera kune rumwe ruzivo nezve izvi.Ini ndinofarira kuita zviyero zvepamusoro zvehunyoro hwevhu.

Fungidzira kana paine kondakita akakwana akatenderedza sensor (semuenzaniso, kana sensor yakanyudzwa mune yemvura gallium simbi), yaizobatanidza sensing capacitor mahwendefa kune mumwe nemumwe kuitira kuti iyo chete insulator pakati pavo ingave yakaonda conformal coating pa bhodhi redunhu.

Aya akachipa capacitive sensors, akavakirwa pamachipi mazana mashanu nemakumi mashanu, anowanzo shanda pamhepo mumakumi e kHz, iyo yakadzikira zvakanyanya kuti ibvise simba remunyu wakanyungudika.Inogona kunge yakaderera zvakakwana kukonzera mamwe matambudziko akadai se dielectric absorption, iyo inozviratidza se hysteresis.

Ziva kuti sensor board iri chaizvo capacitor munhevedzano nevhu rakaenzana redunhu, rimwe parutivi rumwe.Iwe unogonawo kushandisa electrode isina kuvharidzirwa pasina chero kuvhara kwekubatanidza zvakananga, asi electrode inokurumidza kunyungudika muvhu.Kushandiswa kwemunda wemagetsi kunokonzeresa polarization muvhu + mvura nharaunda.Iyo yakaoma yemvumo inoyerwa sebasa renzvimbo yemagetsi inoshandiswa, saka polarization yezvinhu inogara ichisara kumashure kwenzvimbo yemagetsi yakashandiswa.Sezvo kuwanda kwenzvimbo yakashandiswa kunowedzera muhupamhi hweMHz, chikamu chekufungidzira cheiyo dielectric inogara ichidonha inodonha zvakanyanya sezvo dipole polarization isingachateveri yakakwira-frequency oscillations yendima yemagetsi.

Pazasi ~ 500 MHz, chikamu chekufungidzira cheiyo dielectric chisingaperi chinotongwa nemunyu uye, semhedzisiro, conductivity.Pamusoro peaya mafrequency, iyo dipole polarization ichadzikira zvakanyanya uye iyo yese dielectric inongogara ichaenderana nehuwandu hwemvura.

Mazhinji ma sensors ekutengesa anogadzirisa dambudziko iri nekushandisa yakaderera frequency uye kushandisa calibration curve kuverengera zvivakwa zvevhu uye frequency.