Negative temperature coefficient (NTC) thermistors amagwiritsidwa ntchito ngati ma sensor apamwamba kwambiri a kutentha kwamagalimoto osiyanasiyana, mafakitale, zida zam'nyumba ndi zamankhwala.Chifukwa mitundu yosiyanasiyana ya ma thermistors a NTC alipo - opangidwa ndi mapangidwe osiyanasiyana komanso opangidwa kuchokera kuzinthu zosiyanasiyana - kusankha zabwino kwambiri.Ma thermitors a NTCpa ntchito inayake kungakhale kovuta.
Chifukwa chiyani?kusankhaNTC?
Pali njira zitatu zazikuluzikulu zaukadaulo wa sensor kutentha, iliyonse ili ndi mawonekedwe ake: zowunikira kutentha (RTD) masensa ndi mitundu iwiri ya ma thermistors, ma coefficient thermistors abwino ndi oipa.Masensa a RTD makamaka amagwiritsidwa ntchito poyeza kutentha kwakukulu, ndipo chifukwa amagwiritsa ntchito zitsulo zoyera, amakhala okwera mtengo kuposa thermistors.
Chifukwa chake, chifukwa ma thermitors amayezera kutentha molingana kapena bwinoko, nthawi zambiri amawakonda kuposa RTDS.Monga momwe dzinalo likusonyezera, kukana kwa chotenthetsera chabwino cha kutentha (PTC) kumawonjezeka ndi kutentha.Amagwiritsidwa ntchito kwambiri ngati masensa ochepetsa kutentha pozimitsa kapena mabwalo achitetezo chifukwa kukana kumakwera kutentha kukafika.Kumbali ina, kutentha kumawonjezeka, kukana kwa kutentha kwapakati (NTC) thermistor kumachepa.Ubale wotsutsana ndi kutentha (RT) ndi wokhotakhota, choncho ndi wolondola kwambiri komanso wokhazikika pakuyezera kutentha.
Zosankha zofunika kwambiri
Ma thermistors a NTC ndi ovuta kwambiri ndipo amatha kuyeza kutentha molondola kwambiri (± 0.1 ° C), kuwapanga kukhala abwino kwa machitidwe osiyanasiyana.Komabe, kusankha mtundu wanji woti afotokoze zimadalira njira zingapo - kutentha kwa kutentha, kukana, kulondola kwa kuyeza, chilengedwe, nthawi yoyankha, ndi zofunikira za kukula.
Zinthu za NTC zokutidwa ndi epoxy ndi zolimba ndipo nthawi zambiri zimayezera kutentha kwapakati pa -55°C ndi +155°C, pamene zinthu za NTC zokhala ndi galasi zimafika +300°C.Pazinthu zomwe zimafuna nthawi yoyankha mwachangu, zida zotsekeredwa ndi galasi ndizoyenera kwambiri.Amakhalanso ophatikizika, okhala ndi mainchesi ang'onoang'ono ngati 0.8mm.
Ndikofunikira kufananiza kutentha kwa thermistor ya NTC ndi kutentha kwa gawo lomwe limapangitsa kuti kutentha kusinthe.Chotsatira chake, sizipezeka mu mawonekedwe achikhalidwe okhala ndi zitsogozo, komanso zimatha kukhazikitsidwa mu nyumba yamtundu wa screw kuti zigwirizane ndi radiator kuti zikhazikike pamwamba.
Zatsopano pamsika ndizopanda lead (chip ndi gawo) zotenthetsera za NTC zomwe zimakwaniritsa zofunikira za malangizo omwe akubwera a RoSH2.
Kugwiritsa ntchitoExampleOmwachidule
Zigawo za masensa a NTC ndi machitidwe amayendetsedwa m'magawo osiyanasiyana, makamaka m'gawo lamagalimoto.Zomwe zimagwiritsidwa ntchito ndizo mawilo otenthetsera ndi mipando, komanso makina owongolera nyengo.Ma thermistors amagwiritsidwa ntchito pamakina a exhaust gas recirculation (EGR), masensa intake manifold (AIM), komanso kutentha ndi manifold absolute pressure (TMAP) masensa.Kutentha kwawo kwakukulu kogwira ntchito kumakhala ndi kukana kwakukulu komanso kugwedezeka kwamphamvu, kudalirika kwakukulu, komanso moyo wautali wokhala ndi kukhazikika kwanthawi yayitali.Ngati ma thermistors azigwiritsidwa ntchito pamagalimoto, ndiye kuti kukana kupsinjika kwa AEC-Q200 padziko lonse lapansi ndikoyenera.
M'magalimoto amagetsi ndi osakanizidwa, masensa a NTC amagwiritsidwa ntchito pachitetezo cha batri, kuyang'anira ma pulse windings ndi momwe amachitira.Makina ozizira a refrigerant omwe amazizira batire amalumikizidwa ndi makina owongolera mpweya.
Kuzindikira kutentha ndi kuwongolera pazida zapakhomo kumakhudza kutentha kosiyanasiyana.Mwachitsanzo, mu chowumitsira zovala, asensor kutenthaimatsimikizira kutentha kwa mpweya wotentha umene umalowa mu ng'oma ndi kutentha kwa mpweya umene umatuluka pamene ukutuluka m'ng'oma.Kwa kuziziritsa ndi kuzizira, theSensor ya NTCimayesa kutentha m’chipinda chozizirirapo, imalepheretsa mpweya wozizira kuzizira, ndi kuzindikira kutentha kozungulira.Mu zipangizo zing'onozing'ono monga zitsulo, opanga khofi ndi ketulo, zowunikira kutentha zimagwiritsidwa ntchito pa chitetezo ndi mphamvu zamagetsi.Magawo otenthetsera, mpweya wabwino ndi mpweya (HVAC) amakhala ndi gawo lalikulu pamsika.
The Kukula Medical Field
Malo a zamagetsi azachipatala ali ndi zida zosiyanasiyana zothandizira odwala, odwala kunja komanso kusamalira kunyumba.Ma thermistors a NTC amagwiritsidwa ntchito ngati zigawo zozindikira kutentha pazida zamankhwala.
Pamene chipangizo chaching'ono chachipatala chikuyimitsidwa, kutentha kwa ntchito ya batri yowonjezeredwa kuyenera kuyang'aniridwa nthawi zonse.Izi ndichifukwa choti ma electrochemical reaction omwe amagwiritsidwa ntchito pakuwunikira nthawi zambiri amadalira kutentha, mwachangu, kusanthula molondola ndikofunikira.
Masamba a Continuous Glucose Monitoring (GCM) amatha kuyang'anira kuchuluka kwa shuga m'magazi mwa odwala omwe ali ndi matenda ashuga.Apa, sensa ya NTC imagwiritsidwa ntchito kuyeza kutentha, chifukwa izi zingakhudze zotsatira.
Chithandizo cha Continuous Positive Airway Pressure (CPAP) chimagwiritsa ntchito makina othandizira anthu omwe ali ndi vuto lobanika kupuma mosavuta akagona.Momwemonso, pamatenda akulu opumira, monga COVID-19, ma ventilator amakina amatenga kupuma kwa wodwalayo pokanikizira mpweya m'mapapu awo ndikuchotsa mpweya woipa.Pazochitika zonsezi, magalasi otsekemera a NTC amaphatikizidwa mu humidifier, catheter ya airway ndi pakamwa pakamwa kuti ayese kutentha kwa mpweya kuti atsimikizire kuti odwala amakhala omasuka.
Mliri waposachedwa wapangitsa kufunikira kwa chidwi chochulukirapo komanso kulondola kwa masensa a NTC okhala ndi kukhazikika kwanthawi yayitali.Woyesa ma virus watsopano ali ndi zofunikira zowongolera kutentha kuti awonetsetse kuti zisankho zichitika pakati pa zitsanzo ndi reagent.Smartwatch imaphatikizidwanso ndi njira yowunikira kutentha kuti ichenjeze za matenda omwe angakhalepo.
Nthawi yotumiza: May-25-2023