Thermocouple: te parau tumu o te mahi, te pūrere

He he he whānui o ngā pūrere me tikanga momo ki te ine i te pāmahana. Etahi o ratou e whakamahia i roto i te ora ia rā, etahi - mo te momo o te rangahau tinana, i roto i ngā tukanga ahumahi, me te tahi atu ahumahi.

Ko tētahi taua pūrere ko te thermocouple. Ka kōrero te parau tumu o te mahi o te pūrere, me te ara iahiko i roto i te wāhanga e whai ake nei.

Ko te pūtake tinana o nga mahi thermocouple

hāngai ana te parau tumu whakahaere o thermocouples te i runga i te tukanga tinana mua. Hoki te wā tuatahi i te pānga, i runga i te pūtake o nei te waeine mahi, kua whakawakia e te pūtaiao Tiamana Thomas Seebeck.

Ko te ngako o te tītohunga, e mau te parau tumu mahi thermocouple e whai ake. I roto i te ara iahiko hiko kati arā, o ngā momo rerekē e rua o conductors, ka whai wāhi ki etahi whakatika taiao pāmahana hiko.

Ko te nāianei hiko hua me te pāmahana ambient mahi i runga i te conductors kei roto i ti'aturiraa rārangi. Ko, te teitei te pāmahana, te nui te nāianei hiko hangaia e te thermocouple. Na i runga i tenei parau tumu o mahi o te thermocouple me resistance ine.

Ai ko tetahi o te thermocouple whakapā i te wāhi i reira he mea tika ki te whanganga i te pāmahana, e karangatia ana ko "wera." Te whakapā tuarua, i roto i te kupu atu - "makariri" - i roto i te huarahi i te ritenga. Taupānga mō te ine thermocouples tukua anake i roto i te take, ina ko raro atu i te pae ine te pāmahana rūma.

he mahi taiawhio poto pērā o te thermocouple, te parau tumu whakahaere. Ka momo o thermocouples kia kōrero i roto i te wāhanga o muri.

momo o thermocouples

I roto i ia ahumahi, te wahi e hiahiatia ana nga inenga pāmahana, whakamahia te nuinga thermocouple. E whakaaturia ana te taputapu me te mahi o ngā momo o te kōwae i raro.

Konumohe-Chromel thermocouple

Ēnei thermocouples aronuinga whakamahia i roto i te nuinga o te wā ki te whakaputa i te whānuitanga o ngā pūoko me pōkai e taea ai mana pāmahana i roto i te hanga ahumahi.

Ratou āhuatanga motuhake ko te utu āhua iti, me te whānuitanga nui o te pāmahana whanganga. tukua ratou ki te whakatika i te pāmahana o i -200 ki 13 mano degrees.

he tika ki te whakamahi i te thermocouple ki alloys rite i roto i ngā toa, me ngā teitei whanariki i roto i te rangi reira, no te mea tenei huānga matū paa kino e rua te chromium me te konumohe, meinga raruraru i roto i te mahi o te pūrere.

Chromel-Copel thermocouple

Ko te parau tumu o te mahi o te thermocouple, te rōpū whakapā tito nei o enei alloys ko te taua. Ko whakahaere te nuinga enei whakaaro i roto i te taiao wai haurehu waihā ranei he kūpapa, āhuatanga kore-ha'iriiri. E kore e te tohu pāmahana o runga nui 8000 tohu degrees.

thermocouple taua hāngai, e whakamahi te parau tumu o te mahi ka taea reira ki te whakatū i te tohu o te whakawera o tetahi mata, hei tauira, mō te kimi i te pāmahana o tuwhera oumu kanga tetahi atu hanganga rite ranei.

thermocouple Iron-constantan

e kore te mea rite noa rite te tuatahi o nga momo i raro i whiriwhiria tenei huinga o hoapā i roto i te thermocouple. Ko te parau tumu whakahaere o thermocouples ko te taua, engari i mahi pai tenei huinga i roto i te huru rarefied. Ko te mehua taumata mōrahi e kore e nui ake te pāmahana 12,500 degrees.

Heoi, ki te tīmata te pāmahana ki te ara i runga 7000 nekehanga, i reira te mea he takahi mōrearea o te tika inenga e tika ana ki ngā rerekētanga i roto i ngā āhuatanga ā-tinana me te matū o te rino. He ara take waikura o te thermocouple rino fetu◊utaki på i te aroaro o te kohu ambient wai.

thermocouples Platinum-konukawata

Ko te tino utu i roto i te hanga o thermocouples. Ko te parau tumu o te mahi ko te taua, engari he reira rerekē i ratou ritenga rawa pūmau, me te pono pānui pāmahana. He he tūtohutanga iti.

Ko te tono matua o enei whakaaro - ine pāmahana teitei.

thermocouple Tungsten-rhenium

Kei te whakamahia hoki te reira mō te ine pāmahana tiketike rawa. Ko te rohe mōrahi e taea te kiia e te tikanga o te ara iahiko tae 25 mano degrees.

Ratou whakamahi titau tautukunga ki etahi tikanga. Ko te kupu, i roto i te pāmahana he tika inenga ki te whakakore rawa i te huru a tawhio noa, e kua he pānga tōraro i runga i te titi i roto i te tukanga piti hāora.

Hoki tenei Tungsten-rhenium thermocouple te nuinga o whakanohoia i roto i kuhunga ki tonu ki te hau e mangere tiaki ratou huānga.

Runga ake i te uiui e ia thermocouple ngā, te taputapu, te parau tumu o te reira i runga i te alloys whakamahia. Na titiro i etahi o nga āhuatanga hoahoa.

hanga o thermocouples

E rua ngā momo matua o whakaaro thermocouples.

• Ki te tono o te apa tuuraa. whakarato ana tēnei hoahoa mō te thermocouple whakahaere apa pūrere wehe i te nāianei hiko. he kaupapa pērā ka taea te whakamahi o te thermocouple i roto i te tukanga, kahore motuhake i te tomokanga whenua.

• Te kore te whakamahi o te apa tuuraa. Ka taea te hono peheé thermocouples anake ki nga takatakanga whanganga, nga kōkuhunga o e kahore whakapā ki te whenua. Ki te te kore tutaki tenei huru, te pūrere i reira e rua ara iahiko kati motuhake, ai te pānuitanga whiwhi mā te whakamahi i te thermocouple kore e e tika.

Rere thermocouple me tona tono

He he he momo motuhake o tenei pūrere, tuku ki rite "haere". Ko te parau tumu o te mahi o te thermocouple ratere matou whakaaro inaianei i roto i te taipitopito atu.

Kei te nuinga whakamahia tenei hoahoa mō te whakatau i te pāmahana o te Billet maitai i roto i tona tukatuka i tahuri, mira me ētahi atu machining taua.

Me kï reira e i roto i taea i tenei take ki te whakamahi i te thermocouple tikanga, Heoi, ki te titau te tukanga ahumahi mana pāmahana pū nui, he thermocouple rere te amuitahiraa.

A, no te tono i tēnei tikanga ki te workpiece i mua o ona huānga whakapā hiri te. Na, i roto i te tukatuka o te Billet, e tonu wāhi enei hoapā ki te taputapu mahi atu taputapu mīhini ranei, ai te hononga (i te mea te huānga matua i roto i ngā āhuatanga pāmahana tango) rite reira "rere" o hoapā.

Kei te whānui whakamahia tenei pānga i roto i te ahumahi whakarewa.

āhuatanga hangarau o whakaaro thermocouples

I roto i te hanga o te mahi iahiko titi thermocouple hanga te o hoapā whakarewa e rua e kua mohiotia ki kia hanga o ngā rauemi rerekē. huaina te huinga ko "komititanga".

Me kï reira e hanga i te pūhui kōwhiri mā titaha. Noa ketia tahi rua hoapā. Ko te taua tikanga ahumahi kore e whai i te taumata rawaka o te tika, a kia hoki hapa whakarato ka tango i nga āhuatanga pāmahana.

Ki te hiahia koe i ine pāmahana nui, whakakapia whakarewa whakapiringa te ki ratou fehokotaki'anga. Ko e tika ana ki te meka e te nuinga o te tūhoto whakamahia i hononga, kua he ira whakakoero iti me te ngaro ka nui tona taumata te tenei.

Scheme, te hanga o i kua fehokotaki'anga kua tono, ka taea e te tu i te whānuitanga pāmahana whānui. Ko tenei tikanga o te hononga kua ona drawbacks. Ko te hanganga ā-o te whakarewa ki runga ki te rongo ki tiketike pāmahana i roto i fehokotaki'anga kia huri, e ka pā i te kounga o te raraunga.

Ano, kia aroturuki reira te mana o te hoapā thermocouple i roto i te akoranga o tona mahi. Ko te kupu, ko reira taea ki te huri i ngā āhuatanga o konganuku i roto i te ara iahiko e tika ana ki te mau mana taiao pukuriri. Ka taea e piti hāora puta interdiffusion o ngā rauemi ranei. I roto i te āhuatanga i taua he mea e tika ana ki te whakakapi i te mahi o te ara iahiko thermocouple.

Ngā momo thermocouples huinga

hua ahumahi Modern e rave rahi whakaaro, e kua whakamahia i roto i te hanga o thermocouples:

• tuwhera huinga;

• Kiriweti huinga;

• he huinga tangata whenua.

thermocouples rawa tuwhera komititanga he rawakore ātete ki awe waho.

Ko te whai i ngā momo e rua o ngā hanganga e taea te whakamahi i roto i ine pāmahana i roto i te taiao kino, i pānga kino i runga i te rua whakapā.

Ano, i tēnei wā kei te whakawhanake i te ahumahi ara iahiko i Semiconductor hangarau thermocouples production.

hapa inenga

Tika o āhuatanga pāmahana whiwhi e te thermocouple tei runga i te rauemi o te rōpū whakapā, me te āhuatanga o waho. ngā te whakamutunga te pēhanga, te radiation papamuri ranei ētahi atu take e pā pea te āhuatanga ōkiko me te matū o ngā konganuku, e hanga hoapā.

Tika o te inenga ngā o te wāhanga e whai ake nei:

• hapa matapōkere meinga e te āhuatanga thermocouple ahumahi;

• hapa meinga e pāmahana takahi "matao" whakapā;

• hapa, te take o nei mahi rite ngangau waho;

• hapa taputapu mana.

Ko te painga o te whakamahi i thermocouples

Ko te painga o te whakamahi i taua whakaaro mo te whakahaere i te pāmahana, ahakoa o te tono, he:

• tohu āputa nui e taea te tuhia e te thermocouple;

• titi thermocouple, i te mea tika wāhi i roto i te tango o pānuitanga e taea te tūnga i roto i te whakapā tika ki te wāhi whanganga;

• tukanga ohie o thermocouples whakangao, ratou kaha me te mauroa o te mahi.

Huakore o te inenga pāmahana te whakamahi i te thermocouple

Ko te āhuatanga o te tono thermocouples ngā:

• Ko te hiahia ki tonu aroturuki i te pāmahana o "matao" thermocouple whakapā. Ko te āhuatanga motuhake o te hoahoa o mea whanganga, e hāngai ana ki te thermocouple tenei. Ko te parau tumu o te mahi o te kaupapa vāofi tona hōkai. Ka taea te whakamahi ratou anake, ki te ko te pāmahana ambient i raro i te pāmahana i te wāhi ruri.

• Tūkinotanga o te hanganga roto o konganuku whakamahia i roto i te hanga o te thermocouple. Ko te meka Ko e ngaro tika ki te taiao o waho hoapā ratou taurite, e ai hapa i roto i te pānuitanga pāmahana hua.

• I roto i te inenga o te rōpū thermocouple whakapā ko te tikanga raro ki te pānga kino o te taiao e ai feia faahuehue i te tukanga. titau ano tenei te taatiraa o te hoapā, e ai utu tiaki atu o taua pūoko.

• He he he fakatu'utāmaki o te rongo ki ngā ngaru hiko e te thermocouple nei hanga whakarato te rōpū whakapā roa. Ka taea hoki e pā te reira i te hua o inenga.

• I roto i ētahi wā i kitea hononga takahi rārangi i waenganui i nāianei hiko e puta i roto i te thermocouple me te pāmahana i te pae inenga. Me whiwhi tēnei āhuatanga he taputapu mana whakatika.

mutunga

Ahakoa ona tōnounoú, te tikanga o te inenga o te pāmahana ki thermocouples, i tuatahi whakaaro, ka whakamatauria i roto i te rau tau 19, i kitea tona tono whānui i roto i manga katoa o te ahumahi hou.

Ano, i reira te tīariari tono i reira te whakamahi o thermocouples he anake te ara o te whiwhi i te raraunga pāmahana. A i kite i tenei rauemi, koe mahino āta te mau parau tumu o ta ratou mahi.