Masensa a Hall amachokera ku Hall effect. The Hall effect ndi njira yoyambira yophunzirira momwe zida za semiconductor zimagwirira ntchito. Coefficient ya Hall yoyezedwa ndi kuyesa kwa Hall effect imatha kudziwa magawo ofunikira monga mtundu wa conductivity, ndende yonyamula katundu komanso kuyenda kwa zonyamula zida za semiconductor.
Gulu
Masensa a Hall amagawidwa mu mzere wa Hall masensa ndi kusintha masensa Hall.
1. Linear Hall sensor imakhala ndi Hall element, amplifier linear ndi emitter follower, ndi zotulutsa kuchuluka kwa analogi.
2. Kusintha kwamtundu wa Hall sensor kumapangidwa ndi voltage regulator, Hall element, differential amplifier, Schmitt trigger ndi gawo lotulutsa, ndi zotsatira za digito.
Zinthu zopangidwa ndi zida za semiconductor zochokera ku Hall effect zimatchedwa Hall elements. Ili ndi maubwino okhudzidwa ndi maginito, mawonekedwe osavuta, ang'onoang'ono kukula, kuyankha pafupipafupi, kusiyanasiyana kwamagetsi otulutsa komanso moyo wautali wautumiki. Chifukwa chake, yakhala ikugwiritsidwa ntchito kwambiri pamiyeso, makina, makompyuta ndiukadaulo wazidziwitso.
Mndi application
Masensa a Hall effect amagwiritsidwa ntchito kwambiri ngati masensa a malo, kuyeza liwiro lozungulira, kusintha malire ndi kuyeza koyenda. Zida zina zimagwira ntchito motengera momwe Hall imagwirira ntchito, monga masensa a Hall effect current, ma switch a masamba a Hall effect, ndi masensa amphamvu a Hall effect maginito. Chotsatira, sensa yapamalo, sensa yothamanga yozungulira ndi kutentha kapena kupanikizika kumafotokozedwa makamaka.
1. Sensa ya malo
Masensa a Hall effect amagwiritsidwa ntchito kuti azindikire kuyendayenda, mumtundu uwu wa sensa padzakhala kusiyana kolimba pakati pa holo ndi maginito, ndipo mphamvu ya maginito idzasintha pamene maginito akuyenda mmbuyo ndi mtsogolo pamtunda wokhazikika. Pamene chinthucho chili pafupi ndi kumpoto, gawolo lidzakhala loipa, ndipo pamene chinthucho chili pafupi ndi South pole, mphamvu ya maginito idzakhala yabwino. Masensa awa amatchedwanso ma sensor apafupi ndipo amagwiritsidwa ntchito poyika bwino.
2. Sensa yothamanga
Pozindikira liwiro, sensa ya Hall effect imayikidwa molunjika moyang'anizana ndi maginito ozungulira. Maginito ozungulirawa amapanga mphamvu yamaginito yofunikira kuti igwiritse ntchito sensor kapena Hall element. Makonzedwe a maginito ozungulira amatha kusiyanasiyana, kutengera kusavuta kwakugwiritsa ntchito. Ena mwa makonzedwe amenewa amakhala mwa kuyika maginito amodzi patsinde kapena pabwalo kapena pogwiritsa ntchito maginito a mphete. Sensor ya Hall imatulutsa pulse nthawi iliyonse ikakumana ndi maginito. Kuphatikiza apo, ma pulse awa amayendetsedwa ndi purosesa kuti adziwe ndikuwonetsa liwiro mu RPM. Masensa awa amatha kukhala digito kapena mzere wa analogi otulutsa masensa.
3. Kutentha kapena kupanikizika kwa sensor
Masensa a Hall effect amathanso kugwiritsidwa ntchito ngati zowunikira komanso kutentha, masensa awa amaphatikizidwa ndi kukakamiza kosokoneza diaphragm yokhala ndi maginito oyenerera, ndipo kuphatikizika kwa maginito kwa mavuvu kumayendetsa chinthu cha Hall mmbuyo ndi mtsogolo.
Pankhani ya kuyeza kwa kuthamanga, mavuvu amatha kukulirakulira komanso kupindika. Kusintha kwa mavuvu kumapangitsa kuti maginito asunthike kuyandikira ku Hall effect element. Choncho, chifukwa linanena bungwe voteji ndi molingana ndi kukakamizidwa ntchito.
Pankhani ya kuyeza kwa kutentha, msonkhano wa bellows umasindikizidwa ndi mpweya womwe umadziwika ndi kufalikira kwa kutentha. Chipindacho chikatenthedwa, mpweya mkati mwa mvutowo umakula, zomwe zimapangitsa kuti sensa ipange mphamvu yofanana ndi kutentha.
Nthawi yotumiza: Nov-16-2022