Garaaca sensor. Mabda'a hawlgalka iyo xaqiijinta

baabuurta Modern waxay leeyihiin dareemayaal kala duwan oo ku saleysan caddeyn in unit gacanta gacanta ku hawlgal cutubkan oo dhan. Mid ka mid ah arimahan ku lug leh nidaamka shidaalka duro, shidma qaraxa ah, mabda'a ah kaas oo ku salaysan yahay saamaynta piezoelectric.

Garaaca shidma yaal engine gaariga. Waxaa abuuraa karsado danab ka qaraxa ka mid ah qaraxyada in engine ah. On ku salaysan cadaymaha ka helay, unit gacanta gacanta ku sahayda shidaalka, oon ku gaari karo hufnaan awood engine iyo isticmaalka shidaalka ugu badan.

Noocyada dareemayaal dhaawac

Waxaa jira laba nooc oo qalab - broadband iyo resonant. Laakiinse haatan shidma dhaawac resonance aan la rakibay sida caadiga ah. Sidoo kale waa inaad garanaysaan inayan ahayn waa laysku beddelid karo, sidaas darteed dhigay, tusaale ahaan, halkii broadband a resonant ma shaqeyn doono.

Mabda 'hawlgalka

hawlgalka shidma waxay ku salaysan tahay saamaynta piezoelectric. dirato signal shidma ka danab DC ah 5V ah. Waa resistor ah, taas oo yaraynaysa danab si 2.5V, oo ku soo laabtay signal AC dirato. kala iibsiga signal dambe waxaa la sameeyaa by helitaanka circuit danab tixraaca. Tani waa suurto gal, maxaa yeelay, dirato helo signal ka danab DC ah, iyo guuldaradoodii - AC danab. Marka qarax uu dhaco in signal qaraxa engine shidma ahbaa AC Ilodanimada inayan iyo inta jeer ee taas oo si toos ah ay ku xidhan tahay ciidamada qaraxa ka. Haddii inta lagu jiro hawlgalka caadiga ah ee xakamaysada motor ku soo laabtay ah AC 2.5V signal danab, dirato tago hawlgalka engine in qaabka hadda. Haddii in signal keentay waa weecasho ee qiimaha jagada, dirato badala waqtiga dabku ka, si ay u damiyaan hawlgalka qaraxa iyo kala iibsiga ee engine ah ee hab dhaqaale iyo ammaan.

Hubinta shidma dhaawac

Marka guriga, shidma dhaawac iyo hawlgal la eegi karo oo la multimeter ah. First of dhan, waa in la jaro ka isku xira ee korontada, ka dibna waxa ay u wareejin ka engine ah. Ku xiridda ahaatid in ay baaritaan sida soo socota: cas (positive) silig ku xiran yahay in ay xiriir ah oo isku xira, iyo madow (negative) - in guryaha. Si ay u tijaabiso oolnimada lagama maarmaanka ah si khafiif ka jaftaa dunta, dheehan shidma dhaawac waa in ay soo saaraan digir ah ilaa 300 oo danab MV, taas oo diiwaan multimeter ah. Haddii mawjadahaa awood aadan ka diiwaan gashanayn, ka dibna shidma yahay khaldan. Haddii danab multimeter ku dhaco ka dib markii stroke kasta, hubi isku xira shidma iyo fiilooyin. Inta badan waa in xiriir xun ma jirto xakamaysada isgaarsiinta iyo shidma, sidaa darteed waa in aad nadiifiso xiriirada. Sidoo kale hubi xarkaha ee wareeg furan. Waxaa macquul ah in cable la rifmay kaliya meel ama joojiyay.