Injin Mota Mota Man Fetur na yau da kullun na motsin motsi na jirgin ƙasa 1875784C92

1.ka'idar aiki

Ka'idar aiki na ma'aunin juriya na ƙarfe shine al'amari cewa juriya da aka tallata akan kayan tushe yana canzawa tare da nakasar injina, wanda akafi sani da tasirin juriya. Ana iya bayyana ƙimar juriya na jagoran karfe ta wannan dabara:

R=ρ

Inda: ρ-resistivity na karfe madugu (ω/m)

S—— Ketare yanki na madugu ()

L-tsawon madugu (m)

Bari mu ɗauki juriya na ƙarfe na waya a matsayin misali. Lokacin da wayar ƙarfe ta kasance ƙarƙashin ƙarfin waje, tsayinsa da yanki na giciye zai canza. Daga dabarar da ke sama, ana iya gani cikin sauƙi cewa ƙimar juriyarsa za ta canza. Idan igiyar karfe ta mike ta hanyar waje, tsayinsa zai karu kuma yankin giciye zai ragu, kuma darajar juriya zata karu. Lokacin da aka matsa waya ta hanyar ƙarfin waje, tsayin yana raguwa kuma sashin giciye yana ƙaruwa, kuma ƙimar juriya ta ragu. Muddin ana auna canjin juriya (yawanci ana auna ƙarfin wutar lantarki a cikin juriya), ana iya samun yanayin rashin ƙarfi na waya.

2.Principle aikace-aikace

Na'urar firikwensin yumbu mai jure lalata ba shi da watsa ruwa, kuma matsa lamba yana aiki kai tsaye a saman gaban yumburagm ɗin yumbu, yana haifar da diaphragm ɗin ya ɗan lalace. Ana buga masu tsayayyar fim masu kauri a bayan farfajiyar yumbura kuma an haɗa su don samar da gadar Wheatstone ( gada mai rufewa). Saboda tasirin piezoresistive na piezoresistor, gadar tana haifar da siginar wutar lantarki mai tsayi mai tsayi daidai da matsa lamba da kuma daidai da ƙarfin kuzari. An daidaita siginar daidaitaccen siginar azaman 2.0/3.0/3.3 mV/V bisa ga kewayon matsi daban-daban. Ta hanyar daidaitawar laser, firikwensin yana da kwanciyar hankali mai zafi da kwanciyar hankali na lokaci. Na'urar firikwensin yana da diyya na zafin jiki na 0 ~ 70 ℃ kuma yana iya kasancewa cikin hulɗa kai tsaye tare da yawancin kafofin watsa labarai.

Ceramic abu ne da aka sani tare da babban elasticity, juriya na lalata, juriya na lalacewa, juriya mai tasiri da juriya na girgiza. A thermal kwanciyar hankali na tukwane da lokacin farin ciki film juriya na iya sa ta aiki zafin jiki kewayon high as-40 ~ 135 ℃, kuma yana da high daidaito da kwanciyar hankali a auna. Matsayin insulation na lantarki> 2kV, siginar fitarwa mai ƙarfi da kwanciyar hankali na dogon lokaci. Na'urori masu auna firikwensin yumbu tare da halaye masu girma da ƙananan farashi zasu zama jagorancin ci gaba na na'urori masu auna matsa lamba. A Turai da Amurka, ana samun yanayin maye gurbin sauran nau'ikan na'urori masu auna firikwensin gaba daya. A kasar Sin, masu amfani da yawa suna amfani da na'urori masu auna firikwensin yumbu don maye gurbin na'urori masu auna firikwensin silicon.