I-K19 fuel pressure sensor 2897690 yezesekeli ze-Cummins diesel engine

1. Semiconductor varistor uhlobo inzwa yokucindezela.

(1) Isimiso sokulinganisa se-semiconductor piezoresistive pressure sensor Inzwa yokucindezela kwe-semiconductor piezoresistive isebenzisa umphumela we-piezoresistive we-semiconductor ukuguqula ingcindezi ibe isignali ye-voltage ehambisanayo, futhi isimiso sayo siboniswa kuMfanekiso 8-21.

I-semiconductor strain gauge iwuhlobo lwe-elementi ebucayi inani layo lokumelana lizoshintsha ngokuhambisanayo lapho idonswa noma icindezelwa. Amageji e-strain anamathiselwe ku-silicon diaphragm futhi axhunywe ukwenza ibhuloho le-Wheston. Lapho i-silicon diaphragm ikhubazekile, igeji yokulinganisa ngayinye iyadonswa noma icindezelwe futhi ukumelana kwayo kuyashintsha, futhi ibhuloho lizoba nokuphuma kwamandla okuhambisanayo.

(2) Isakhiwo se-piezoresistive intake pressure sensor Ukwakheka kwe-semiconductor piezoresistive intake pressure sensor kuboniswe ku-Figure 8-22. Kukhona i-silicon diaphragm engxenyeni yokuguqula ingcindezi yenzwa, futhi ukuguqulwa kokucindezelwa kwe-silicon diaphragm kuzokhiqiza amasignali ahambisanayo kagesi. Olunye uhlangothi lwe-silicon diaphragm luyi-vacuum, kanti olunye uhlangothi lwethulwa ngomfutho wepayipi lokungenisa. Lapho ingcindezi epayipini lokungenisa ishintsha, ukuguqulwa kwe-silicon diaphragm kuzoshintsha ngokufanele, futhi isignali ye-voltage ehambisana nokucindezela kokuthatha izokwenziwa. Ukucindezela kwe-inlet kukhulu, kukhulu ukuwohloka kwe-silicon diaphragm kanye nokucindezela kokukhiphayo kwenzwa.

Inzwa ye-semiconductor varistor yohlobo lokungenisa ingcindezi inezinzuzo zokulandelana okuhle, usayizi omncane wesakhiwo, ukunemba okuphezulu kanye nezici zokuphendula ezinhle.

I-1) Uhlobo lokuthola imvamisa: imvamisa ye-oscillation yesekethe ye-oscillation iyashintsha ngevelu ye-capacitance yesici esibucayi sokucindezela, futhi ngemuva kokulungiswa nokukhulisa, isignali ye-pulse ene-frequency ehambisana nokucindezela iyaphuma.

I-2) Uhlobo lokuthola i-voltage: ukuguqulwa kwevelu ye-capacitance yesici esibucayi se-pressure modulated by carrier wave kanye ne-AC amplifier circuit, yehliswa yisekethe yomtshina, bese ihlungwa ngomjikelezo wesihlungi kusiginali ye-voltage ephumayo ehambisana nokushintsha kwengcindezi.