20 KB1239 KB16 KB199920252011Boltežar, MihaPirnat, MihaSavšek, Zdenkoštevilka:1letnik:57str. 21-26ISSN:0039-2480COBISSID:11774491URN:URN:NBN:SI:doc-1VDLRR90enAssociation of Mechanical Engineers and Technicians of Slovenia et al.Zveza strojnih inženirjev in tehnikov Slovenije et al.Strojniški vestnikdinamične obremenitvedynamic loadsfoldable bicyclesmerilni lističistrain gaugesWheatstone bridgeWheatstonov mostičzložljiva kolesaMeasuring dynamic loads on a foldable city bicycle|Strain gauges have been used to measure dynamic loads on a foldable bicycle while it is being ridden. Eight full, Wheatstone-bridge measuring points were used to measure the forces on the front and rear wheels, the handlebars, the seat and the pedals. These bridges were positioned at special measuring parts that simplified the measurements. Some of the measuring problems that were successfully resolved are described. The measuring took place on public roads where real-life data was gathered for various riding situations. For an easier interpretation of the data, a camera, an encoder and a GPS system were used. The results are shown for some riding situations and their impact on the design of foldable bicycles is discussedZložljiva mestna kolesa so vedno bolj zanimiva alternativa javnemu prevozu v mestih, saj omogočajo parkiranje avtomobila na bolj oddaljenih parkiriščih, ki so brezplačna in potem nadaljevanje poti v mesto s kolesom. Na ta način se lahko uporabnik izogne kaznim za nepravilno parkiranje, prenapolnjenim avtobusom in je hkrati neodvisen od voznih redov. Pri razvoju takšnega zložljivega kolesa se izkaže, da trenutno ni standarda, na katerega bi se lahko razvojni inženir oprl pri dimenzioniranju ključnih komponent, kot je na primer okvir ali krmilo, saj vsi standardi predvidevajo klasično geometrijo kolesa, ki je zložljivo kolo nima in je ne more imeti. V ta namen je bilo potrebno izvesti meritve dinamičnih obremenitev kolesa med vožnjo v različnih okoliščinahTEXTznanstveno časopisjejournalsSlovenian National E-content AggregatorNational and University Library of SloveniaUniverza v Ljubljani, Fakulteta za strojništvo