ALayisha Iseliiwuhlobo oluthile lwe-transducer noma inzwa eguqula amandla abe okuphumayo kukagesi okulinganiswayo. Idivayisi yakho yeseli yomthwalo evamile iqukethe amageji ezinhlobo ezine ekucushweni kwebhuloho le-wheatstone. Esikalini sezimboni lokhu kuguqulwa kuqukethe umthwalo oguqulwa ube isignali kagesi ye-analog
ULeonardo Da Vinci usebenzise izikhundla zama-counterweights alinganisiwe ku-lever engumshini ukuze alinganise futhi anqume izisindo ezingaziwa. Ukuhlukahluka kwemiklamo yakhe kwasebenzisa izinsimbi eziningi, ngasinye sinobude obuhlukile futhi silinganiswe nesisindo esisodwa esivamile. Ngaphambi kokuthi amaseli womthwalo we-hydraulic kanye ne-electronic strain gauge load athathele indawo izinsimbi zokukala izimboni, lezi zikali ze-lever zemishini zazisetshenziswa kakhulu. Ayesetshenziselwa ukukala yonke into kusukela kumaphilisi kuya ezimotweni zikaloliwe futhi akwenza ngokunembile nangokwethembeka inqobo nje uma ayekalwe kahle futhi enakekelwa. Babehilela ukusetshenziswa kwendlela yokulinganisa isisindo noma ukutholwa kwamandla athuthukiswe ama-lever mechanical. Izinzwa zamandla egage zakuqala, zangaphambi kokucindezeleka zazihlanganisa imiklamo ye-hydraulic kanye ne-pneumatic.
Ngo-1843, isazi sefiziksi saseBrithani uCharles Wheatstone sakha isifunda sebhuloho esingakala ukuphikiswa kukagesi. Isekhethi yebhuloho le-Wheatstone ilungele ukukala izinguquko zokumelana ezenzeka kumageji obunzima. Nakuba i-wire strain gage yokuqala eboshiwe yathuthukiswa ngawo-1940, kwaze kwaba yilapho ugesi wesimanje ubanjwa lapho ubuchwepheshe obusha bube nokwenzeka ngokwezobuchwepheshe nangokwezomnotho. Nokho, kusukela ngaleso sikhathi, ama-strain gage ande kokubili njengezingxenye zesikali somshini kanye namaseli omthwalo ozimele. Namuhla, ngaphandle kwamalabhorethri athile lapho kusasetshenziswa khona ibhalansi yemishini enembayo, amaseli omthwalo wegeji alawula imboni yokukala. Amaseli omthwalo we-pneumatic ngezinye izikhathi asetshenziswa lapho ukuphepha nokuhlanzeka kwangaphakathi kufunwa khona, futhi amaseli omthwalo we-hydraulic acatshangelwa ezindaweni ezikude, njengoba engadingi ukunikezwa kwamandla. Amaseli omthwalo we-strain gage anikeza ukunemba ukusuka ku-0.03% kuya ku-0.25% esikalini esigcwele futhi afanele cishe zonke izinhlelo zokusebenza zezimboni.
Isebenza kanjani?
Imiklamo yeseli yomthwalo ihlukaniswa ngokohlobo lwesignali yokuphumayo ekhiqizwayo (i-pneumatic, hydraulic, electric) noma ngokuya ngendlela ethola ngayo isisindo (ukucindezelwa, ukungezwani, noma ukugunda)I-Hydraulicamangqamuzana okulayisha angamathuluzi okulinganisa amandla, ukulinganisa isisindo njengoshintsho ekucindezelweni koketshezi lwangaphakathi lokugcwalisa.I-pneumaticamaseli okulayisha nawo asebenza ngomgomo wokulinganisa amandla. Lawa madivayisi asebenzisa ama-dampener amaningi
amakamelo ukuze anikeze ukunemba okuphezulu kunomshini osebenza ngamanzi.I-Strain-gageamaseli omthwalo aguqula umthwalo osebenza kuwo ube amasignali kagesi. Ama-gauge ngokwawo aboshelwa phezu kohlaka noma ilungu lesakhiwo eliwohlokayo lapho isisindo sisetshenziswa.
Isikhathi sokuthumela: May-06-2021