ʻO Thermocouple kahi mea wela maʻamau i hoʻohana ʻia i ke ana wela

ʻO ka mea mua, ʻo ka thermocouple kahi mea wela maʻamau i hoʻohana ʻia i ke ana wela. ʻO kāna mau hiʻohiʻona nui ka laulā o ke ana ʻana i ka honi, ka hana paʻa, ke ʻano maʻalahi, ka pane dynamic maikaʻi, a hiki ke hoʻouna i nā hōʻailona uila 4-20mA ma kahi mamao, kahi kūpono no ka hoʻokele aunoa. A ka mana kikowaena.
Ke kumu othermocoupleHoʻokumu ʻia ke ana wela i ka hopena thermoelectric. Hoʻohui i ʻelua mau alakaʻi ʻokoʻa a i ʻole semiconductors i loko o kahi loop loop, ke ʻano ʻokoʻa nā mahana ma nā hui ʻelua, e hoʻokumu ʻia ka mana thermoelectric i loko o ka loop. Kapa ʻia kēia hanana ka hopena pyroelectric, i ʻike ʻia ʻo ka hopena Seebeck.

ʻO ka mana thermoelectric i hana ʻia i loko o ka puka pani i haku ʻia i ʻelua ʻano o nā mana uila; hiki i ka thermoelectric a me ka hiki ke pili. ʻO ka hikiwawe Thermoelectric e pili ana i ka mana uila i hana ʻia e nā ʻaoʻao ʻelua o ka conductor hoʻokahi ma muli o nā mahana like ʻole. Loaʻa i nā mea hoʻokele like ʻole nā ​​density electron ʻokoʻa, no laila e hoʻohua ai lākou i nā pono uila like ʻole. ʻO ka hiki ke hoʻopili ke ʻano o ka pili ʻana o ʻelua mau mea hoʻokele like ʻole.

Ma muli o ka ʻokoʻa o ko lākou mau electron density, hiki mai kahi nui o ka diffusion electron. Ke hiki lākou i kahi kaulike, ʻo ka hiki ke hoʻokumu ʻia e ka mea hoʻopili pili e pili ana i nā waiwai waiwai o nā conductors ʻelua a me ka mahana o ko lākou mau wahi pili. I kēia manawa, kanā thermocouplehoʻohana ʻia ma ka honua he maʻamau. Hoʻokaʻawale ʻia nā thermocouple i hoʻoponopono ʻia ma ka honua i ʻewalu mau mahele, ʻo ia hoʻi ʻo B, R, S, K, N, E, J a me T, hiki ke ana i ka wela haʻahaʻa. He 270 degere Celsius ma lalo o ka ʻole, a hiki ke piʻi i ke kiʻekiʻe o 1800 degere Celsius.

Ma waena o lākou, ʻo B, R, a me S no ka pūʻulu platinum onā thermocouple. No ka mea he metala makamae ka platinum, ua kapa ʻia lākou he thermocouple metala makamae a ua kapa ʻia nā mea i koe he thermocouple metala haʻahaʻa. ʻElua ʻano o nā hale thermocouple, ʻano maʻamau a me ke ʻano pale. Hoʻokumu ʻia nā thermocouple maʻamau me ka thermode, ka paipu insulating, ka lima mālama a me ka pahu hui, ʻoiai ʻo thermocouple ka mea i hui pū ʻia me ka uea thermocouple, nā mea insulation a me ka lima mālama metala ma hope o ka hui ʻana, ma hope o ka huki ʻana.