Yadda Thermocouple Sensors Aiki
Lokacin da aka samu mabambantan conductors da semiconductor A da B da za su samar da madauki, kuma an haɗa ƙarshen biyu da juna, muddin yanayin yanayin mahaɗar biyu ya bambanta, yanayin zafin ƙarshen ɗaya shine T, wanda ake kira da. Ƙarshen aiki ko ƙarshen zafi, kuma yanayin zafi na ɗayan ƙarshen shine TO , wanda ake kira ƙarshen kyauta ko ƙarshen sanyi, akwai wani motsi a cikin madauki, wato, ƙarfin electromotive da ke cikin madauki ana kiransa thermoelectromotive force.Wannan al'amari na samar da ƙarfin lantarki saboda bambance-bambancen zafin jiki shine ake kira sakamako Seebeck.Akwai tasiri guda biyu da suka shafi Seeebeck: na farko, lokacin da wani halin yanzu ke gudana ta hanyar mahaɗar madugu biyu daban-daban, zafi yana shiga ko kuma a sake shi a nan (ya danganta da yanayin halin yanzu), wanda ake kira sakamako na Peltier;Na biyu, lokacin da halin yanzu ke gudana ta hanyar madugu tare da yanayin zafin jiki, mai gudanarwa yana sha ko sakin zafi (ya danganta da alkiblar halin yanzu dangane da yanayin zafin jiki), wanda aka sani da tasirin Thomson.Haɗuwa da masu gudanarwa ko semiconductor daban-daban ana kiran su thermocouple.
Yadda Na'urori Masu Tsayawa Aiki
Ƙimar juriya na madugu tana canzawa tare da zafin jiki, kuma ana ƙididdige zafin abin da za a auna ta hanyar auna ƙimar juriya.Na'urar firikwensin da aka kafa ta wannan ka'ida ita ce firikwensin zafin jiki na juriya, wanda galibi ana amfani da shi don yanayin zafin jiki na -200-500 ° C.Aunawa.Karfe mai tsabta shine babban kayan masana'anta na juriya na thermal, kuma kayan juriya na thermal yakamata su sami halaye masu zuwa:
(1) Matsakaicin zafin jiki na juriya yakamata ya zama babba kuma karko, kuma yakamata a sami kyakkyawar alaƙar madaidaiciya tsakanin ƙimar juriya da zafin jiki.
(2) Babban tsayayya, ƙananan ƙarfin zafi da saurin amsawa.
(3) Kayan yana da kyakkyawan haɓakawa da fasaha, kuma farashin yana da ƙasa.
(4) Sinadarai da kaddarorin jiki sun tabbata a cikin kewayon ma'aunin zafin jiki.
A halin yanzu, platinum da tagulla sune aka fi amfani da su a masana'antar, kuma an sanya su su zama daidaitattun ma'aunin zafin jiki.
Abubuwan la'akari lokacin zabar firikwensin zafin jiki
1. Ko yanayin muhalli na abin da aka auna yana da wani lahani ga ma'aunin zafin jiki.
2. Ko zafin abin da aka auna yana buƙatar rikodin, firgita da sarrafa ta atomatik, da kuma ko yana buƙatar aunawa da watsa shi daga nesa.3800 100
3. A cikin yanayin da yanayin zafin abin da aka auna ya canza tare da lokaci, ko lauyoyin ma'aunin zafin jiki na iya biyan buƙatun auna zafin jiki.
4. Girma da daidaito na kewayon ma'aunin zafin jiki.
5. Ko girman ma'aunin zafin jiki ya dace.
6. Farashin yana da garanti kuma ko ya dace don amfani.
Yadda ake guje wa kurakurai
Lokacin shigarwa da amfani da firikwensin zafin jiki, ya kamata a guje wa kurakurai masu zuwa don tabbatar da tasirin auna mafi kyau.
1. Kurakurai da aka haifar ta hanyar shigarwa mara kyau
Misali, matsayi na shigarwa da zurfin shigar da thermocouple ba zai iya nuna ainihin zafin tanderu ba.A wasu kalmomi, kada a shigar da thermocouple kusa da ƙofar da dumama, kuma zurfin shigarwa ya kamata ya zama akalla sau 8 zuwa 10 na diamita na bututun kariya.
2. Kuskuren juriya na thermal
Lokacin da zafin jiki ya yi girma, idan akwai shinge na toka na gawayi a kan bututun kariya kuma an haɗa ƙurar da shi, juriya na thermal zai karu kuma ya hana tafiyar da zafi.A wannan lokacin, ƙimar nunin zafin jiki ya yi ƙasa da ainihin ƙimar zafin da aka auna.Don haka, ya kamata a kiyaye waje na bututun kariya na thermocouple mai tsabta don rage kurakurai.
3. Kurakurai da rashin kyawun rufewa
Idan an kulle thermocouple, datti mai yawa ko gishiri a kan bututun kariya da allon zane na waya zai haifar da rashin daidaituwa tsakanin thermocouple da bangon tanderun, wanda ya fi tsanani a yanayin zafi, wanda ba zai haifar da asarar kawai ba. yuwuwar thermoelectric amma kuma yana gabatar da tsangwama.Kuskuren da wannan ke haifarwa na iya kaiwa Baidu wani lokaci.
4. Kurakurai da aka gabatar ta thermal inertia
Ana bayyana wannan tasirin musamman lokacin yin ma'auni mai sauri saboda rashin ƙarfi na thermal na thermocouple yana sa ƙimar da aka nuna ta mita ta koma baya bayan canjin yanayin da ake aunawa.Sabili da haka, ya kamata a yi amfani da ma'aunin zafi da sanyio tare da firikwensin thermal electrode da ƙaramin diamita na bututun kariya gwargwadon yiwuwa.Lokacin da yanayin auna zafin jiki ya ba da izini, ana iya cire bututun kariya.Saboda lagwar ma'auni, girman canjin yanayin zafin da thermocouple ya gano ya yi ƙasa da na jujjuyawar zafin tanderu.Mafi girman girman ma'auni, ƙarami girman juzu'in thermocouple kuma ya fi girma bambanci daga ainihin zafin tanderun.
Lokacin aikawa: Nuwamba-24-2022