Mene ne bambanci tsakanin thermocouple da thermal juriya?

A halin yanzu, dathermocouplesda ake amfani da su a duniya suna da ƙayyadaddun ƙayyadaddun bayanai. Dokokin kasa da kasa sun yi nuni da cewa an raba na'urorin thermocouples zuwa kashi takwas daban-daban, wato B, R, S, K, N, E, J da T, kuma zafin da aka auna ya ragu. Yana iya auna debe 270 digiri Celsius kuma har zuwa 1800 digiri Celsius. Daga cikinsu, B, R, da S suna cikin jerin platinum na thermocouples. Tun da platinum ƙarfe ne mai daraja, ana kuma kiran su da ma'aunin thermocouples mai daraja, sauran kuma ana kiran su da arha Metal thermocouple.

Akwai nau'i biyu nathermocouples, nau'in gama gari da nau'in sulke.

Thermocouples na yau da kullun gabaɗaya sun ƙunshi thermode, bututu mai rufewa, hannun riga da akwatin junction, yayin da thermocouple mai sulke haɗaɗɗiyar waya ce ta thermocouple, kayan rufewa da hannun rigar ƙarfe. A m hade kafa ta mikewa. Amma siginar lantarki na thermocouple yana buƙatar waya ta musamman don watsawa, irin wannan nau'in waya shine ake kira waya ramuwa.
Daban -daban na thermocouples suna buƙatar wayoyi daban -daban na ramawa, kuma babban aikin su shine haɗi tare da thermocouple don kiyaye ƙarshen abin da ake kira thermocouple daga wutar lantarki, don zafin zafin ƙarshen ya tabbata.

Wayoyin biyan diyya sun kasu kashi biyu: nau'in diyya da nau'in tsawo
Abun da ke cikin sinadarin waya na fadadawa iri daya ne da na thermocouple da ake ramawa, amma a aikace, ba a yin waya mai tsawo daga kayan abu daya da na thermocouple. Gabaɗaya, ana maye gurbin ta da waya mai yawa iri ɗaya kamar nathermocouple. Haɗin da ke tsakanin waya ta diyya da thermocouple a bayyane yake. Pole mai kyau na thermocouple an haɗa shi da jan waya na waya na diyya, kuma an haɗa madaidaicin mara kyau zuwa sauran launi.

Yawancin wayoyi na ramuwa na gaba ɗaya an yi su ne da gami da jan ƙarfe-nickel gami.
Thermocouple ita ce na'urar zafin da aka fi amfani da ita wajen auna zafin jiki. Babban halayensa sune kewayon ma'aunin zafin jiki mai faɗi, ingantaccen aiki mai ƙarfi, tsari mai sauƙi, ingantaccen amsa mai ƙarfi, kuma mai watsa jujjuya na iya watsa sigina na yanzu 4-20mA nesa. , Ya dace don sarrafawa ta atomatik da sarrafawa ta tsakiya.

Ka'idarthermocouplema'aunin zafin jiki ya dogara ne akan tasirin thermoelectric. Haɗa madugu daban-daban guda biyu ko na'urori a cikin rufaffiyar madauki, lokacin da yanayin zafi a mahaɗin biyu ya bambanta, za a samar da yuwuwar thermoelectric a cikin madauki. Ana kiran wannan al'amari da tasirin thermoelectric, wanda kuma aka sani da tasirin Seeebeck. Ƙarfin wutar lantarki da aka samar a cikin rufaffiyar madauki ya ƙunshi nau'i biyu na ƙarfin lantarki; bambance-bambancen zafin jiki yuwuwar wutar lantarki da yuwuwar wutar lantarki.

Ko da yake kuma ana amfani da juriyar zafi sosai a masana'antu, aikace-aikacen sa yana da iyakancewa saboda yanayin auna zafinsa. Ka'idar auna zafin jiki na juriya na thermal yana dogara ne akan ƙimar juriya na jagora ko semiconductor yana canzawa tare da zafin jiki. hali. Hakanan yana da fa'idodi da yawa. Hakanan yana iya watsa siginar lantarki daga nesa. Yana da babban hankali, kwanciyar hankali mai ƙarfi, musanyawa da daidaito. Koyaya, yana buƙatar samar da wutar lantarki kuma ba zai iya auna canje-canjen zafin jiki nan take ba.

Yanayin zafin jiki da aka auna ta juriya na thermal da ake amfani da shi a masana'antu yana da ɗan ƙaramin ƙarfi, kuma ma'aunin zafin jiki baya buƙatar waya diyya, kuma farashin yana da arha.