Ngokusebenzisa umphumela wokucindezeleka wamakhondaktha ensimbi, igeji yobunzima exhunywe ku-PCBA ingalinganiswa ngokushintsha kwenani layo lokumelana lapho i-PCBA ikhubaza futhi ikhubazeka ngokwemishini.I-quantified strain ingaqhathaniswa ne-strain yokugcina yokunquma ubungozi bokuguqulwa kwe-PCBA ezingxenyeni noma ukugqashuka kwephoyinti le-tin lezingxenye.Nikeza isiqondiso sezinyathelo zokuthuthukisa inqubo ye-PCBA.
Isistimu yokuhlola i-straining ithola ukushintsha kwamandla kagesi okubangelwa ukushintsha kokumelana ne-strain gauge ngebhuloho le-Wheatstone, bese iguqula ukuguqulwa kwamandla kagesi kube ubunzima ngohlelo lwesofthiwe yokuhlola ubunzima.
Imbali yohlobo lwe-strain gauge equkethe amagridi amathathu azwelayo azimele, anqwabelene endaweni efanayo ukuze kulinganiswe uhlobo oluhambisana nezimbazo zazo endaweni efanayo.
Ubunzima buchazwa ngokuthi (ukushintsha kobude)/(ubude bangempela), inani lomzimba elingenasici, ekuhlolweni kohlobo lwe-PCBA, ngoba inani lobunzima lincane kakhulu, ngokuvamile lichazwa yi-microstrain (με), ngokuya ngo-106* (ushintsho lobude) /(ubude bangempela) ukuchaza i-microstrain.
Ekuhlolweni kohlobo lwe-PCBA, isimo sobunzima se-PCBA yisimo sohlobo lwendiza.Isistimu yokuhlaziya ukuhlolwa kobunzima ingabala ubunzima obuyinhloko kanye nezinga le-strain kunqubo ye-PCBA ngokulinganisa inani lesikhathi sangempela sobunzima emikhondweni emithathu yembali yohlobo, ukuze kwahlulele ukuthi uhlobo lomkhiqizo lwenqubo ludlula yini izinga.
Izinyathelo ezingaphezu komkhawulo wobunzima zibhekwa njengezidlulele futhi zikhonjwa ukuze kuthathwe isinyathelo sokulungisa.Imikhawulo yokucindezeleka ingatholwa kukhasimende, umphakeli wengxenye, noma izinqubo ezaziwayo ngaphakathi kwebhizinisi/imboni (etholakala ku-IPC_JEDEC-9704A).
Lapho uhlobo oluyinhloko luwuhlobo lwe-orthogonal olukhulu kakhulu futhi oluncane endizeni, oluncikene komunye nomunye futhi uhlobo lwe-tangent ohlangothini luyiziro.Ekuhlolweni kohlobo lwe-PCBA, uhlobo oluyinhloko luvamise ukubalwa ngokulinganisa njengombandela wemethrikhi ebalulekile.Izinga lobunzima libonisa izinga lokushintsha kobunzima ngesikhathi seyunithi ngayinye, esetshenziselwa ukukala ubungozi bokulimala kwezingxenye.
Hlunga i-gage
IPC_JEDEC-9704A
Isistimu yokuhlaziya ukuhlolwa
Isikhathi sokuthumela: Apr-22-2024