ʻO Hall effect sensor a i ʻole Hall effect transducer kahi mea ʻike i hoʻohui ʻia e pili ana i ka hopena Hall a i haku ʻia me ka mea Hall a me kāna kaapuni kōkua.Hoʻohana nui ʻia ka Hall sensor i ka hana ʻoihana, ka lawe ʻana a me ke ola o kēlā me kēia lā.Mai ka hale o loko o ka hale ʻike, a i ʻole ke kaʻina o ka hoʻohana ʻana, e ʻike ʻoe i kamagnet mauhe mahele hana nui.No ke aha e koi ʻia ai nā magnet mau loa no nā mea ʻike Hall?
ʻO ka mea mua, e hoʻomaka mai ke kumu hana o Hall sensor, Hall Effect.ʻO Hall Effect kahi ʻano o ka hopena electromagnetic, i ʻike ʻia e ka physicist ʻAmelika Edwin Herbert Hall (1855-1938) i ka makahiki 1879 i ka wā e aʻo ana i ka hana conductive o nā metala.Ke hele ke au i ka conductor perpendicular to external magnetic field, hoʻohuli ka mea lawe, a e hoʻokumu ʻia kahi māla uila hou e pili pono ana i ke kuhikuhi o ke ʻano a me ke kahua magnetic, e hopena i kahi ʻokoʻa ma nā kihi ʻelua o ka conductor.ʻO kēia hanana ʻo Hall effect, ka mea i kapa ʻia ʻo Hall potential difference.
ʻO ka hopena Hall ʻo ia ka deflection o ka neʻe ʻana i nā ʻāpana i hoʻoiho ʻia e ka ikaika Lorentz i ke kahua magnetic.Ke hoʻopaʻa ʻia nā ʻāpana i hoʻopaʻa ʻia (electrons a i ʻole nā lua) i loko o nā mea paʻa, alakaʻi kēia deflection i ka hōʻiliʻili ʻana o nā koina maikaʻi a maikaʻi ʻole i ke kuhikuhi e pili pono ana i ke kahua o kēia manawa a me ke kahua magnetic, no laila e hoʻokumu i kahi kahua uila transverse hou.
Ua ʻike mākou i ka wā e neʻe ai nā electrons i kahi kahua magnetic, e hoʻopilikia ʻia lākou e ka ikaika Lorentz.E like me luna, e nānā mua kākou i ke kiʻi ma ka hema.I ka neʻe ʻana o ka electron i luna, e neʻe i lalo ka mea i hana ʻia e ia.ʻAe, e hoʻohana kākou i ka lula lima hema, e ʻae i ka laina ʻike magnetic o ke kahua mākēneki B (pana i ka pale) e komo i loko o ka poho lima, ʻo ia hoʻi, aia ka poho lima i waho, a kuhikuhi i nā manamana ʻehā i ka ʻo ka ʻaoʻao o kēia manawa, ʻo ia hoʻi, ʻehā mau kiko i lalo.A laila, ʻo ke kuhikuhi o ka manamana nui ke kuhikuhi ikaika o ka electron.Hoʻokuʻu ʻia nā electrons i ka ʻākau, no laila e hili ka uku ma ka pā lahilahi i kekahi ʻaoʻao ma lalo o ka hana o ke kahua magnetic waho.Inā hili ka electron i ka ʻākau, e hana ʻia kahi ʻokoʻa ma ka ʻaoʻao hema a me ka ʻaoʻao ʻākau.E like me ka mea i hōʻike ʻia ma ke kiʻi ma ka ʻākau, inā pili ka voltmeter i ka ʻaoʻao hema a me ka ʻaoʻao ʻākau, e ʻike ʻia ka volta.ʻO kēia ke kumu kumu o ka hoʻokomo hale.Ua kapa ʻia ka volta i ʻike ʻia i ka hall induced voltage.Inā hoʻoneʻe ʻia ke kahua magnetic waho, nalowale ka volta Hall.Inā hōʻike ʻia e kahi kiʻi, ua like ka hopena Hall me kēia kiʻi:
i: ka ʻaoʻao o kēia manawa, B: ka ʻaoʻao o ke kahua mākēneki waho, V: ʻO ka volta Hall, a ʻo nā kiko liʻiliʻi i loko o ka pahu e hiki ke manaʻo ʻia he electrons.
Mai ke kumu hana o Hall sensor, hiki ke ʻike ʻia ʻo Hall effect sensor kahi sensor ikaika, pono e koi i ka lako mana waho a me ke kahua magnetic e hana.Ke noʻonoʻo nei i nā koi o ka liʻiliʻi liʻiliʻi, ke kaumaha māmā, ka hoʻohana haʻahaʻa haʻahaʻa a me ka hoʻohana maʻalahi i ka noi ʻana o ka sensor, hoʻohana ʻia kahi magnet paʻa maʻalahi ma mua o kahi electromagnet paʻakikī e hoʻolako i ke kahua magnetic waho.Eia kekahi, i nā ʻano nui ʻehā o nā magnet mau loa,SmCoaNdFeB honua laha oleLoaʻa i nā magnets nā mea maikaʻi e like me nā waiwai magnetic kiʻekiʻe a me ka paʻa hana paʻa, hiki ke hiki i ka transducer hopena Hall hana kiʻekiʻe a i ʻole sensor ke hiki i ka pololei, ka ʻike, a me nā ana hilinaʻi.No laila, hoʻohana ʻo NdFeB a me SmCo e like meNā mākēneki transducer hopena Hall.
Ka manawa hoʻouna: Sep-10-2021