He aha ka NTC Temperature Sensor?

He aha ka NTC Temperature Sensor?

No ka hoʻomaopopo ʻana i ka hana a me ka hoʻohana ʻana o ka mea ʻike wela NTC, pono mākou e ʻike mua i ke ʻano o ka thermistor NTC.
Pehea ka hana ʻana o ka mea ʻike wela o ka NTC i wehewehe maʻalahi
ʻO nā mea hoʻokele wela a i ʻole nā ​​​​mea hoʻomehana wela he mau pale uila me nā koena wela maikaʻi ʻole (NTC no ka pōkole). Inā kahe ke au i nā ʻāpana, e emi ana ko lākou kūpaʻa me ka piʻi ʻana o ka mahana. Inā hāʻule ka mahana o ka honua (e laʻa me ka lima immersion), ʻo nā ʻāpana, ma kekahi ʻaoʻao, e pane me ka piʻi ʻana o ke kū'ē. Ma muli o kēia ʻano hana kūikawā, ʻike pū ka poʻe loea i kahi pale NTC ma ke ʻano he NTC Thermistor.

E emi ana ke kūpale uila ke neʻe nā electrons
ʻO nā mea pale NTC nā mea semiconductor, ʻo ka conductivity ka mea maʻamau ma waena o nā mea hoʻokele uila a me nā mea hoʻokele uila ʻole. Inā wela nā ʻāpana, wehe nā electrons mai nā ʻātoma lattice. Haʻalele lākou i ko lākou wahi i ka hale a ʻoi aku ka maikaʻi o ka lawe ʻana i ka uila. ʻO ka hopena: Me ka piʻi ʻana o ka mahana, ʻoi aku ka maikaʻi o ka hana ʻana o ka thermistors i ka uila - e emi ana ko lākou pale uila. Hoʻohana ʻia nā ʻāpana, ma waena o nā mea ʻē aʻe, e like me nā mea ʻike wela, akā no kēia pono e hoʻopili ʻia lākou i kahi puna uila a me kahi ammeter.

Hana ʻia a me nā waiwai o nā conductors wela a me ke anu
Hiki i ka mea pale NTC ke hana me ka nawaliwali loa a i ʻole, ma kekahi mau wahi, ikaika loa i ka hoʻololi ʻana i nā mahana ambient. ʻO ke ʻano kikoʻī e pili ana i ka hana ʻana o nā ʻāpana. Ma kēia ala, hoʻololi nā mea hana i ka ratio hui ʻana o nā oxides a i ʻole ka doping o nā oxide metala i nā kūlana i makemake ʻia. Akā hiki ke hoʻopili ʻia nā waiwai o nā ʻāpana me ke kaʻina hana ponoʻī. No ka laʻana, ma o ka ʻike oxygen i loko o ka lewa ahi a i ʻole ka helu hoʻomaha hoʻokahi o nā mea.

ʻO nā mea like ʻole no ka resistor NTC
Hoʻohana ʻia nā mea semiconductor maʻemaʻe, nā semiconductor hui a i ʻole nā ​​​​mea hao hao e hōʻoia i ka thermistors e hōʻike i ko lākou ʻano ʻano. ʻO ka mea hope loa he mau ʻokiki metala (hui metala a me ka oxygen) o manganese, nickel, cobalt, hao, keleawe a me ka titanium. Hoʻopiliʻia nā mea me nā mea hoʻopaʻa paʻa, paʻiʻia a sintered. Hoʻomaʻamaʻa nā mea hana i nā mea maka ma lalo o ke kaomi kiʻekiʻe i hiki ke hana ʻia nā mea hana me nā waiwai i makemake ʻia.

ʻO nā hiʻohiʻona maʻamau o ka thermistor i ka nānā
Loaʻa ka resistor NTC ma nā pae mai hoʻokahi ohm a 100 megohms. Hiki ke hoʻohana ʻia nā ʻāpana mai ka liʻiliʻi o 60 a hoʻohui i 200 degere Celsius a loaʻa i ka tolerances o 0.1 a 20 pakeneka. I ke koho ʻana i kahi thermistor, pono e noʻonoʻo ʻia nā ʻāpana like ʻole. ʻO kekahi o nā mea koʻikoʻi ʻo ka nominal resistance. Hōʻike ia i ka waiwai kū'ē ma kahi mahana nominal i hāʻawi ʻia (maʻamau 25 degere Celsius) a ua kaha ʻia me kahi kapikala R a me ka mahana. No ka laʻana, R25 no ka waiwai kū'ē ma 25 degere Celsius. ʻO ke ʻano kikoʻī ma nā ʻano wela like ʻole. Hiki ke kuhikuhi ʻia kēia me nā papa, nā ʻano a i ʻole nā ​​kiʻi a pono e kūlike me ka noi i makemake ʻia. ʻO nā ʻano waiwai ʻē aʻe o nā resistors NTC e pili ana i ka hoʻomanawanui a me kekahi mau palena wela a me ka volta.

Nā ʻāpana like ʻole o ka noi no kahi resistor NTC
E like me kahi pale PTC, kūpono hoʻi kahi pale NTC no ke ana wela. Hoʻololi ka waiwai kū'ē ma muli o ka mahana ambient. Iʻole e hoʻopunipuni i nā hopena, pono e kaupalenaʻia ka hoʻomehana pono'ī e like me ka hiki. Eia nō naʻe, hiki ke hoʻohana ʻia ka hoʻomehana ponoʻī i ka wā o ke kahe o kēia manawa e kaupalena i ke au inrush. No ka mea, ua anuanu ka pale pale NTC ma hope o ka hoʻololi ʻana i nā mea uila, no laila ke kahe liʻiliʻi wale nō i ka wā mua. Ma hope o kekahi manawa i ka hana ʻana, wela ka thermistor, hāʻule ke kūpaʻa uila a kahe hou aku. Hoʻokō nā mea uila i kā lākou hana piha ma kēia ala me kahi lohi manawa.

ʻOi aku ka maikaʻi o ka hana ʻino ʻana o ka mea pale NTC i nā wela haʻahaʻa. Inā piʻi ka mahana ambient, ʻo ke kūʻē ʻana o nā mea i kapa ʻia ʻo nā conductors mahana e emi nui. Hiki ke hoʻohana mua ʻia ke ʻano kūikawā o nā mea semiconductor no ke ana wela, no ka hoʻopili ʻana i kēia manawa a i ʻole no ka hoʻopaneʻe ʻana i nā ʻano like ʻole.