IiThermitors eziNtathu zahlulwe ngoHlobo loBuqondo

Izifudumezi zibandakanya i-coefficient yobushushu evumayo (PTC) kunye ne-negative temperature coefficient (NTC) thermistors, kunye ne-critical thermistors (CTRS).

1.PTC thermistor

I-Positive Temperature CoeffiCient (PTC) yi-thermistor phenomenon okanye izinto ezinomlinganiso wokushisa ofanelekileyo kunye nokunyuka okubukhali ekuchaseni kwiqondo elithile. Ingasetyenziswa njengenzwa yeqondo lokushisa rhoqo. Izinto eziphathekayo ngumzimba we-sintered kunye ne-BaTiO3, i-SrTiO3 okanye i-PbTiO3 njengenxalenye ephambili, kwaye yongeza i-oxides ye-Mn, Fe, Cu kunye ne-Cr eyandisa i-coefficient yokumelana nokushisa okufanelekileyo kunye nezinye izongezo ezidlala ezinye iindima. Izinto eziphathekayo zenziwe ngenkqubo ye-ceramic eqhelekileyo kunye ne-sintered kwiqondo lokushisa eliphezulu ukwenza i-platinum titanate kunye nesisombululo sayo esiqinileyo se-semi-conductive. Ngaloo ndlela izixhobo ze-thermistor ezineempawu ezintle zifunyenwe. I-coefficient yeqondo lokushisa kunye neqondo lokushisa le-Curie liyahluka ngokubunjwa kunye neemeko ze-sintering (ingakumbi iqondo lokupholisa).

I-thermistor ye-PTC yavela ngenkulungwane yama-20, i-thermistor ye-PTC ingasetyenziselwa ukulinganisa ubushushu kunye nokulawula kwishishini, ikwasetyenziselwa ukufunyaniswa kobushushu kunye nokulawulwa kwenxalenye yemoto, kodwa kunye nenani elikhulu lezixhobo zoluntu, ezinjengokulawula ubushushu bamanzi obushushu bamanzi, isifudumezi somoya kunye nobushushu bokugcina obubandayo, ukusetyenziswa kokufudumeza kwayo kwigesi enye uhlalutyo kunye ne-anemometer.

I-PCT thermistor inomsebenzi wokugcina ubushushu kuluhlu oluthile, kwaye iphinda idlale indima yokutshintsha. Ukusebenzisa le mpawu yokumelana nokushisa njengomthombo wokufudumeza, inokudlala indima yokukhusela ukufudumala kwezixhobo zombane.

2.NTC thermistor

I-Negative Temperature CoeffiCient (NTC) ibhekisa kwisenzeko se-thermistor kunye nemathiriyeli enomlinganiso wobushushu ombi kuba ukuxhathisa kuncipha ngokukhawuleza njengoko ubushushu bunyuka. Izinto eziphathekayo yi-ceramic ye-semiconducting eyenziwe ngee-oxide zetsimbi ezimbini okanye ngaphezulu ezifana ne-manganese, ubhedu, i-silicon, i-cobalt, i-iron, i-nickel, kunye ne-zinc, ezixutywe ngokupheleleyo, zenziwe, kwaye zifakwe emanzini ukuvelisa i-thermistor ene-coefficient yeqondo lokushisa elibi (NTC).

Inqanaba lophuhliso lwe-NTC thermistor: ukusuka ekufumaneni kwayo ngenkulungwane ye-19 ukuya ekuphuhlisweni kwayo kwinkulungwane yama-20, isalungiswa.

Ukuchaneka kwethemometha ye-thermistor inokufikelela kwi-0. 1℃, kwaye ixesha lokuva ubushushu linokuba ngaphantsi kwe-10s. Ayifanelekanga kuphela i-thermometer ye-granary, kodwa ingasetyenziselwa ukugcina ukutya, amayeza kunye nempilo, ukulima kwenzululwazi, ulwandle, inzulu, ukuphakama okuphezulu, ukulinganisa ubushushu be-glacier.

3.CTR thermistor

I-Critical Temperature Thermistor CTR (I-Critical Temperature Resistor) inesimo esibi sokuchasa ukuguquka, kwiqondo lokushisa elithile, ukuchasana kuncipha kakhulu ngokunyuka kweqondo lokushisa kwaye kunomlinganiselo omkhulu wokushisa ongalunganga. Izinto zokuqulunqa i-vanadium, i-barium, i-strontium, i-phosphorus kunye nezinye izinto zomzimba oxubeneyo, i-semiconductor ye-semi-glassy, eyaziwa ngokuba yi-CTR ye-glass thermistor. I-CTR ingasetyenziswa njenge alarm yokulawula ubushushu kunye nezinye izicelo.

I-Thermistor inokusetyenziswa njengento yesekethe ye-elektroniki kwimbuyekezo yobushushu besekethe yesixhobo kunye nembuyekezo yobushushu besiphelo esibandayo se-thermocouple. Ulawulo lokuzuza ngokuzenzekelayo lunokuphunyezwa ngokusebenzisa i-self-heating character of NTC thermistor, kunye ne-amplitude stabilization circuit, isiphaluka sokulibaziseka kunye nokukhusela isiphaluka se-RC oscillator inokwakhiwa. I-PTC thermistor isetyenziswa ikakhulu kwizixhobo zombane zokukhusela ubushushu obugqithileyo, ukuhanjiswa konxibelelwano, ubushushu obungaguqukiyo, ulawulo lokuzuza ngokuzenzekelayo, ukuqala kwemoto, ukulibaziseka kwexesha, ukujizeka okuzenzekelayo kweTV, i-alam yomlilo kunye nembuyekezo yobushushu, njl.