Isebenza kanjani i-multihead weigher? (isimiso)

Umbhali: Smartweigh– Isisindo Sezinhloko Eziningi

I-multihead weiger umshini oguqula amandla e-kinetic kusuka kwenye indlela kuya kwenye. Ngokukhethekile, i-multihead weiger iyinzwa yamandla eguqula amandla omshini (njengamandla okusekela, ukuncipha, ingcindezi yokusebenza noma i-torque) abe amasignali kagesi angalinganiswa ngokunembile. Amandla okucindezela esignali yedatha ayashintsha ngamandla okucindezela amandla okukhulula.

Kunezinhlobo ezintathu eziyisisekelo zesikali samakhanda amaningi ngokusekelwe kusignali yedatha yokukhipha: i-hydraulic, i-pneumatic kanye ne-resistance strain gauge. Uhlobo oluvame kakhulu lwesikali olusetshenziswa ekukhiqizweni kwezimboni yi-multihead weiger ene-strain eyakhelwe ngaphakathi. I-resistance strain gauge multihead weiger iqukethe umzimba wensimbi eqinile (noma "ingxenye ephuzi ethambile") elungisa i-resistance strain gauge.

Indlu ngokuvamile yenziwe nge-aluminium, insimbi yekhabhoni noma ipuleti lensimbi engagqwali, okwenza libe namandla kakhulu kodwa lithambile kakhulu. Ukuziphatha kwesikali samakhanda amaningi kuyashintsha kancane lapho kusetshenziswa isikali, kodwa kubuyela esimweni saso sokuqala kuyo yonke indawo, ngaphandle kokuthi kungumthwalo. Ukuze iphendule kangcono ekushintsheni kwesimo somzimba, i-resistance strain gauge nayo ishintsha ukubukeka kwayo.

Lokhu-ke kubangela ukuguquka kokumelana kwegeji yokucindezeleka kokumelana, okungalinganiswa ngokunembile njengokuguquka kwe-voltage yokusebenza. Ngenxa yokuthi ukuguquka okunjalo ekuphumeni kuhlobene kahle nesisindo esiphelele esikhishwe, isisindo esiphelele sento singanqunywa kusukela ekuguqukeni kwe-voltage yokusebenza. Isebenza kanjani i-multihead weigher? Ukuze uphendule ngokuthi "Isebenza kanjani i-multihead weigher?" kufanele uqale uqonde ukuthi "Isebenza kanjani i-resistance strain gauge?" I-resistance strain gauge iyithuluzi elilinganisa ngokunembile ukuguquka kwe-resistor lapho kukhishwa amandla.

Igeji yokucindezeleka yokumelana evamile iqukethe i-wire mesh encane kakhulu ye-foil, ebekwe ngendlela yegridi, okwenza i-wire resistor iguquke lapho amandla okucindezeleka ekhishwa nge-axis eyodwa. Kunezinhlobo ezahlukene zamageji okucindezeleka kokumelana ongakhetha kuzo: Igeji yokucindezeleka yokumelana eqondile: Intambo yamandla exhunywe ngemuva kwegeji yokucindezeleka yokumelana ihambisana nomphetho wegeji yokucindezeleka yokumelana. Lokhu kusetshenziselwa ukukala ngokunembile ukucindezeleka kwe-radial kanye nokucindezeleka kokugoba.

Amageyiji okucindezela kokumelana nokusika: Izintambo zikagesi ezixhunywe ngemuva kwamageyiji okucindezela kokumelana zibekwe kuzo zombili izinhlangothi zohlaka lokucindezela olusebenzayo endaweni engama-45o. Lokhu kusetshenziselwa ukukala ngokunembile ukucindezela kokusika. Amageyiji okucindezela kokumelana ngokuvamile asetshenziswa kanye nenani elikhulu lamageyiji okucindezela kokumelana nokuthuthukisa ukunemba.

Igeyiji eyodwa yokumelana ne-amplifier yamandla edijithali ibizwa ngokuthi i-quarter bridge, amageyiji amabili okumelana ne-amplifier yamandla edijithali abizwa ngokuthi i-half bridge, kanti amageyiji amane okumelana ne-amplifier yamandla edijithali abizwa ngokuthi i-full bridge. Ukuguqulwa kwe-resistor gage resistor akufani nokucindezela ibhethri elishajekayo ngamandla asekelayo. Ibanga lokucindezela lenza igeyiji yokumelana ithambe futhi inwebe, iphakamise i-resistor.

Amandla okuqinisa afinyeza ubukhulu begeyiji yokucindezeleka kokumelana futhi anciphise ukumelana. Igeyiji yokucindezeleka kokumelana inamathele emhlane omncane (ibracket elungisiwe), exhunywe ngokushesha kwimojula yokulinganisa, okuvumela igeyiji yokucindezeleka kokumelana ukuthi izwe amandla okucindezeleka esisindo samakhanda amaningi. Ukuguquka kwe-resistor okulinganiswe ngokunembile ngegeyiji yokucindezeleka kokumelana eyodwa kuncane kakhulu, cishe ku-0.12°.

Ukuzwela kwemojuli yomthwalo kuyanda ngenani lamageji okucindezela akhishwayo. Indlela enhle yokuguqula lolu shintsho oluncane lube yinto engacatshangwa kakhulu ukuwaxhumanisa njengamabhuloho okulinganisa ahlakaniphile. Izinhlobo zamageji okucindezela okucindezela Amageji okucindezela okucindezela abekwe ngezindlela ezahlukene, futhi iqiniso lisehlobo lwamandla alinganiswa ngokunembile.

Ukucindezeleka kokugoba, ukucindezeleka kokugunda, ukucindezeleka kwe-radial, i-torque kanye nokucindezela kokusebenza konke kulinganiswa ngokunembile kusetshenziswa ilungiselelo elikhethekile elinengqondo lama-gauge okucindezeleka kokumelana. Isekethe ye-Smart weigh bridge ifakwe ama-resistor amane okulinganisa futhi isebenzisa i-voltage yokusebenza eyaziwayo yokuvuselela, njengoba kuboniswe ngezansi: u-5 yi-voltage yokusebenza eqinile eyaziwayo futhi i-VO ilinganiswa ngokunembile. Uma wonke ama-resistor elinganisiwe, kusho ukuthi i-R1/R2R3/R4 bese kuba yi-VO ayi-zero.

Uma kukhona ushintsho kwelinye lamanani okumelana, kuzoba noshintsho oluvela ku-VO, olungalinganiswa ngokunembile futhi luvezwe kusetshenziswa umthetho we-Ohm. Umthetho we-Ohm ugcizelela ukuthi inani lamanje (I, kuma-ampere) elidlula kumqhubi kagesi phakathi kwamaphuzu amabili lihlobene kahle ne-voltage yokusebenza (V) phakathi kwamaphuzu amabili. I-Resistor (R, elinganiswa ngokunembile kuma-ohms) yethulwa njengencazelo eguquguqukayo kulokhu kuhlangana futhi ayinalutho oluphathelene nokugeleza kwamanje.

Umthetho we-Ohm uvezwa kufomula I=V/R. Uma isetshenziswa emigqeni yamaphepha engu-4 yesekethe yamandla e-Smart weigh bridge, izilinganiso eziphumelayo yilezi: Ku-weigher yamakhanda amaningi, lokhu kumelana kuthathelwa indawo yi-resistance strain gauge ekuthatheni indawo yamandla okusekela kanye nokulinganisa okunembile kokuncipha. Lapho amandla ekhishwa ebhethrini elilayishwa kabusha elilinganisiwe, ama-resistors ku-resistance strain gauge ngayinye ayashintsha futhi i-VO ilinganiswa ngokunembile.

Kusukela kulwazi lwedatha oluvelayo, i-VO ingachazwa kalula kusetshenziswa uhlelo olungenhla lwezibalo.

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