Zisebenza njani i-Thermocouple Sensors
Xa kukho abaqhubi ababini abahlukeneyo kunye ne-semiconductors A kunye no-B ukwenza i-loop, kwaye iziphelo zombini zixhunyiwe omnye komnye, okoko nje amaqondo okushisa kwi-junction ezimbini ahlukile, ubushushu becala elinye ngu-T, elibizwa ngokuba isiphelo esisebenzayo okanye isiphelo esishushu, kunye neqondo lobushushu lesinye isiphelo yi-TO, ebizwa ngokuba yi-free end okanye isiphelo esibandayo, kukho umsinga kwi-loop, oko kukuthi, amandla e-electromotive akhoyo kwi-loop ebizwa ngokuba yi-loop. amandla e-thermoelectromotive. Le nto yokuvelisa amandla e-electromotive ngenxa yokungafani kweqondo lokushisa kuthiwa yi-Seebeck effect. Kukho imiphumo emibini enxulumene ne-Seebeck: okokuqala, xa i-current igeleza ngokudibanisa kwabaqhubi ababini abahlukeneyo, ukushisa kufakwe okanye kukhutshwe apha (kuxhomekeke kwisikhokelo sangoku), okubizwa ngokuba yi-Peltier effect; Okwesibini, xa umbane uhamba nge-conductor ene-gradient yeqondo lokushisa, umqhubi uthatha okanye ukhulule ubushushu (kuxhomekeke kwisalathiso sesalamane esikhoyo kwiqondo lokushisa), eyaziwa ngokuba yi-Thomson effect. Indibaniselwano yabaqhubi ababini abahlukeneyo okanye i-semiconductors ibizwa ngokuba yi-thermocouple.
Zisebenza njani izivamvo ezixhathisayo
Ixabiso lokuchasana le-conductor litshintsha kunye neqondo lokushisa, kwaye iqondo lokushisa lezinto eziza kulinganiswa libalwa ngokulinganisa ixabiso lokumelana. Inzwa eyenziwe ngulo mgaqo yinzwa yokumelana nokushisa, esetyenziselwa ubukhulu becala kwiqondo lokushisa kwiqondo lokushisa -200-500 °C. Umlinganiselo. Intsimbi ecocekileyo iyona nto iphambili yokuvelisa ukuchasana kwe-thermal, kwaye izinto zokumelana ne-thermal kufuneka zibe nezi mpawu zilandelayo:
(1) Umlinganiso wobushushu wokumelana kufuneka ube mkhulu kwaye uzinze, kwaye kufuneka kubekho ubudlelwane obuhle bomgca phakathi kwexabiso lokumelana kunye nobushushu.
(2) Ukumelana okuphezulu, umthamo omncinci wobushushu kunye nesantya sokuphendula ngokukhawuleza.
(3) Izinto eziphathekayo zinokuphinda zenziwe kakuhle kunye nobuchule, kwaye ixabiso liphantsi.
(4) Iimpawu zekhemikhali kunye nezomzimba zizinzile ngaphakathi kwinqanaba lokulinganisa ubushushu.
Okwangoku, iplatinam kunye nobhedu zezona zisetyenziswa kakhulu kwishishini, kwaye zenziwe zaba ngumgangatho oqhelekileyo wokulinganisa ubushushu bobushushu.
Ukuqwalaselwa xa ukhetha inzwa yokushisa
1. Ingaba iimeko zokusingqongileyo zento elinganisiweyo zinomonakalo kwizinto zokulinganisa ubushushu.
2. Ingaba ubushushu bezinto ezilinganisiweyo kufuneka zirekhodwe, zothuswe kwaye zilawulwe ngokuzenzekelayo, nokuba kufuneka zilinganiswe kwaye zihanjiswe kude. 3800 100
3. Kwimeko apho ubushushu bento elinganisiweyo buguquka ngexesha, nokuba i-lag ye-element yokulinganisa ubushushu inokuhlangabezana neemfuno zokulinganisa ubushushu.
4. Ubungakanani kunye nokuchaneka koluhlu lokulinganisa ubushushu.
5. Ingaba ubungakanani bento yokulinganisa ubushushu bufanelekile.
6. Ixabiso liqinisekisiwe kwaye ingaba ikulungele ukuyisebenzisa.
Indlela yokuphepha iimpazamo
Xa ufaka kwaye usebenzisa i-sensor yeqondo lokushisa, ezi mpazamo zilandelayo kufuneka zigwenywe ukuze kuqinisekiswe umphumo ongcono wokulinganisa.
1. Iimpazamo ezibangelwa ukufakela okungafanelekanga
Ngokomzekelo, indawo yokufakela kunye nobunzulu bokufakwa kwe-thermocouple ayikwazi ukubonisa ukushisa kwangempela kwesithando somlilo. Ngamanye amazwi, i-thermocouple ayifanele ifakwe ngokusondeleyo kumnyango kunye nokufudumala, kwaye ubunzulu bokufaka kufuneka bube ubuncinane ngamaxesha angama-8 ukuya kwe-10 ububanzi betyhubhu yokukhusela.
2. Impazamo yokumelana nobushushu
Xa iqondo lokushisa liphezulu, ukuba kukho i-ash ash ash kwi-tube yokukhusela kunye nothuli lufakwe kuyo, ukuchasana kwe-thermal kuya kwanda kwaye kuthintele ukuqhutyelwa kobushushu. Ngeli xesha, ixabiso lesibonakaliso sokushisa liphantsi kunexabiso lokwenene lobushushu obulinganisiweyo. Ngoko ke, ngaphandle kwetyhubhu yokukhusela i-thermocouple kufuneka igcinwe icocekile ukunciphisa iimpazamo.
3. Iimpazamo ezibangelwa kukungagqumeki kakuhle
Ukuba i-thermocouple ifakwe i-insulated, ukungcola kakhulu okanye i-slag yetyuwa kwityhubhu yokukhusela kunye nebhodi yokudweba ucingo iya kukhokelela ekufakeni okungahambi kakuhle phakathi kwe-thermocouple kunye nodonga lwesithando somlilo, olubi kakhulu kwiqondo lokushisa eliphezulu, elingayi kubangela kuphela ukulahlekelwa amandla ombane we-thermoelectric kodwa kwakhona angenise ukuphazamiseka. Impazamo ebangelwe koku inokufikelela e-Baidu ngamanye amaxesha.
4. Iimpazamo eziveliswe yi-inertia ye-thermal
Esi siphumo sivakaliswa ngakumbi xa kusenziwa imilinganiselo ekhawulezayo kuba inertia ye-thermal ye-thermocouple ibangela ukuba ixabiso elibonisiweyo lemitha lishiye emva kotshintsho kwiqondo lobushushu elilinganiswayo. Ngoko ke, i-thermocouple ene-electrode encinci ye-thermal kunye nobubanzi obuncinci betyhubhu yokukhusela kufuneka isetyenziswe kangangoko kunokwenzeka. Xa indawo yokulinganisa ubushushu ivumela, ityhubhu yokukhusela inokususwa. Ngenxa ye-lag yokulinganisa, i-amplitude yokuguquguquka kweqondo lokushisa elifunyenwe yi-thermocouple lincinci kunelo lokutshintsha kweqondo lokushisa. Inkulu i-lag yokulinganisa, incinci i-amplitude yokuguquguquka kwe-thermocouple kunye nomkhulu umahluko ovela kwiqondo lokushisa langempela.
Ixesha lokuposa: Nov-24-2022