Ma thermistors akuphatikizapo positive temperature coefficient (PTC) and negative temperature coefficient (NTC) thermistors, and critical temperature thermistors (CTRS).
1.PTC chotenthetsera
The Positive Temperature CoeffiCient (PTC) ndi chodabwitsa cha thermistor kapena zinthu zomwe zimakhala ndi kutentha kwabwino komanso kuwonjezeka kwakukulu kwa kukana kutentha kwina. Itha kugwiritsidwa ntchito ngati sensor yotentha nthawi zonse. Zomwe zili ndi thupi lopangidwa ndi sintered ndi BaTiO3, SrTiO3 kapena PbTiO3 monga chigawo chachikulu, komanso kuwonjezera ma oxides a Mn, Fe, Cu ndi Cr omwe amawonjezera kutentha kwa kutentha kokwanira ndi zina zowonjezera zomwe zimagwira ntchito zina. Zinthuzo zimapangidwa ndi njira wamba za ceramic ndikuziyika pa kutentha kwambiri kuti zipange platinamu titanate ndi yankho lake lolimba la semi-conductive. Chifukwa chake zida za thermistor zokhala ndi mawonekedwe abwino zimapezedwa. Kutentha kokwanira ndi kutentha kwa Curie point kumasiyana malinga ndi momwe zimapangidwira komanso kutentha (makamaka kuzizira).
PTC thermistor anaonekera m'zaka za m'ma 1900, PTC thermistor angagwiritsidwe ntchito kuyeza kutentha ndi kulamulira mu makampani, komanso ntchito kudziwika kutentha ndi malamulo a mbali ya galimoto, komanso chiwerengero chachikulu cha zipangizo boma, monga ulamuliro wa pompopompo madzi chotenthetsera madzi kutentha, chofewetsa mpweya ndi ozizira yosungirako kutentha, ntchito Kuwotchera yake kusanthula mpweya ndi anemometer ndi mbali zina.
PCT thermistor ili ndi ntchito yosunga kutentha mumtundu wina, komanso imagwira ntchito yosintha. Pogwiritsa ntchito chikhalidwe cha kukana kutentha ngati gwero la kutentha, chingathenso kugwira ntchito yotetezera kutentha kwa zipangizo zamagetsi.
2.NTC chotenthetsera
Negative Temperature CoeffiCient (NTC) imatanthawuza zochitika za thermistor ndi zinthu zomwe zimakhala ndi coefficient yolakwika ya kutentha chifukwa kukana kumachepa kwambiri pamene kutentha kumakwera. Zinthu zake ndi ceramic yopangira zitsulo zopangidwa ndi zitsulo ziwiri kapena zingapo monga manganese, mkuwa, silicon, cobalt, chitsulo, faifi tambala, ndi zinki, zomwe zimasakanizidwa, kupangidwa, komanso kusungunulidwa kuti apange thermistor yokhala ndi kutentha koyipa (NTC). ).
Gawo lachitukuko cha NTC thermistor: kuyambira pomwe idapezeka m'zaka za zana la 19 mpaka kukula kwake m'zaka za zana la 20, ikukwaniritsidwabe.
Kulondola kwa thermometer ya thermistor kumatha kufika 0. 1 ℃, ndipo nthawi yozindikira kutentha imatha kukhala yosakwana 10s. Sikoyenera kokha ku thermometer ya granary, komanso ingagwiritsidwe ntchito posungira chakudya, mankhwala ndi thanzi, ulimi wa sayansi, nyanja, chitsime chakuya, kukwera kwakukulu, kuyeza kutentha kwa glacier.
3.CTR chotenthetsera
Critical Temperature Thermistor CTR (Critical Temperature Resistor) ili ndi mawonekedwe otsutsa osinthika, pa kutentha kwina, kukana kumachepa kwambiri ndi kuwonjezeka kwa kutentha ndipo kumakhala ndi kutentha kwakukulu koyipa. Zomwe zimapangidwa ndi vanadium, barium, strontium, phosphorous ndi zinthu zina za thupi losakanikirana, ndi semiconductor yagalasi, yomwe imadziwikanso kuti CTR ya galasi thermistor. CTR itha kugwiritsidwa ntchito ngati alamu yowongolera kutentha ndi ntchito zina.
Thermistor itha kugwiritsidwanso ntchito ngati gawo lamagetsi lamagetsi polipira chiwongolero cha kutentha kwa zida ndi kubwezera kutentha kwa mathero ozizira a thermocouple. Zodziwikiratu kuwongolera zitha kuzindikirika pogwiritsa ntchito mawonekedwe odziwotcha a NTC thermistor, ndipo ma amplitude stabilization circuit, kuchedwa kuzungulira ndi chitetezo cha RC oscillator akhoza kumangidwa. PTC thermistor imagwiritsidwa ntchito kwambiri pazida zamagetsi zoteteza kutenthedwa, kusalumikizana kopanda kulumikizana, kutentha kosalekeza, kuwongolera zodziwikiratu, kuyambitsa kwagalimoto, kuchedwa kwanthawi, kuwononga kwamtundu wa TV, alamu yamoto ndi kubwezera kutentha, etc.
Nthawi yotumiza: Jan-16-2023