2014/10/23 图上本大生 B西] Project of Portable Projection -Group12 Members:Chen Jie Zhang Hao Xia Yu dreom Cheng Xu Dream Team 国上活大 Outline Tong Untversity ©Gantt chart ©Result of the survey Requirement analysis ©Conceptual design Design Sketch ©Conclusion 1
2014/10/23 1 Shanghai Jiao Tong University Project of Portable Projection Members: Chen Jie Zhang Hao Xia Yu Cheng Xu Dream Team ——Group12 Shanghai Jiao Tong University Outline Gantt chart Result of the survey Requirement analysis Conceptual design Design Sketch Conclusion
2014/10/23 周上香支大华 Gantt Chart TEAM 12 用 Tasks End fneeunte e t Team Bu 国 上商克夏大学 Result of the survey Inconvenience in teaching Disadvantages Fuzzy words on blackboard 20% 34% Unexact expressiong on No projection Not portable blackboard device 79% 1% 56% Instable 2% Expensive 的 2
2014/10/23 2 Shanghai Jiao Tong University Gantt Chart Shanghai Jiao Tong University Result of the survey Inconvenience in teaching Disadvantages
2014/10/23 国上大坐 Result of the survey Lightweight and portable Inexpensive Easy to operate Good appearance Stable 国 Tong Untvorsity Result of the survey The essential problem bothering teachers is that sometimes they cannot give an exact expression in words or on the blackboard Many teachers think the fixed projection device is not convenient enough.They are expecting a portable device. Characters that customers'most wanted are portable and easy to operate. 3
2014/10/23 3 Shanghai Jiao Tong University Result of the survey Shanghai Jiao Tong University Many teachers think the fixed projection device is not convenient enough. They are expecting a portable device. The essential problem bothering teachers is that sometimes they cannot give an exact expression in words or on the blackboard. Characters that customers’ most wanted are portable and easy to operate. Result of the survey
2014/10/23 国上大坐 Requirement analysis QFD Easy to carry appearance 3g3 5 9 Stable 5 39 3 9 3 圈上整 Requirement analysis Functions of requirements Height can be adjusted Hold on the cell phones stably Can be folded and put into the computer bags 4
2014/10/23 4 Shanghai Jiao Tong University Requirement analysis QFD Shanghai Jiao Tong University Functions of requirements Height can be adjusted Hold on the cell phones stably Can be folded and put into the computer bags Requirement analysis
2014/10/23 圈上坐 Requirement analysis Design Goals Easy to carry and deposit ©Durable and stable 圈Write below it easily Beautiful appearance 圈上活坐 Conceptual design Constrains Some specific constrains: 1.Parameter of the phone: Size:124*58.6*7.6mm Weight:112g (take iPhone as an example) 2.Size of the computer bag: 40*35*10cm 3.Range of the height adjustment: 15cm~30cm(fromA5 to A4) 6
2014/10/23 5 Shanghai Jiao Tong University Design Goals Easy to carry and deposit Durable and stable Write below it easily Beautiful appearance Requirement analysis Shanghai Jiao Tong University Conceptual design Some specific constrains: 1. Parameter of the phone： Size: 124*58.6*7.6mm Weight: 112g (take iPhone as an example) 2. Size of the computer bag: 40*35*10cm 3. Range of the height adjustment: 15cm~30cm(from A5 to A4) Constrains
2014/10/23 圈上活整 Conceptual design We divide our mechanism into three parts. ©Supporting part ©Lifting part ©Fixing part 国唐峰 Conceptual design Design Brainstorm Supporting part Tripod Clip Flat 6
2014/10/23 6 Shanghai Jiao Tong University We divide our mechanism into three parts. Supporting part Lifting part Fixing part Conceptual design Shanghai Jiao Tong University Design Brainstorm Supporting part Tripod Clip Flat Conceptual design
2014/10/23 圈上活我大峰 Conceptual design Design Brainstorm ©Lifting part Screw drives bar structure four-bar mechanism 国整 Conceptual design Design Brainstorm ©Fixing part Sucker Clip type Slide way 7
2014/10/23 7 Shanghai Jiao Tong University Lifting part Screw drives bar structure four-bar mechanism Conceptual design Design Brainstorm Shanghai Jiao Tong University Fixing part Sucker Clip type Slide way Conceptual design Design Brainstorm
2014/10/23 圈上冠大空 Design Sketch ©Sketch1 养05c0 6 By experienment in the software,to ensure the motion of point e is we find the ratio of the bar is approximately linear: ad:ab:bc:cd:ce:be=1:1.23:0.56:1.16:1.82:1.95 国上活坐 Design Sketch ©Sketch1 U 5CM h叶块 bar Icm ④0 ⊙
2014/10/23 8 Shanghai Jiao Tong University Design Sketch Sketch 1 By experienment in the software, to ensure the motion of point e is we find the ratio of the bar is approximately linear : ad:ab:bc:cd:ce:be=1 : 1.23 : 0.56 : 1.16 : 1.82 : 1.95 Shanghai Jiao Tong University Design Sketch Sketch 1
2014/10/23 圈上活大空 Design Sketch ©Sketch1 Advantages 1.Simple structure 2.Stable Disavantages 1.It requires high strength of the bars. 圈上人整 Design Sketch ©Sketch2
2014/10/23 9 Shanghai Jiao Tong University Design Sketch Sketch 1 Advantages 1. Simple structure 2. Stable Disavantages 1. It requires high strength of the bars. Shanghai Jiao Tong University Design Sketch Sketch 2
2014/10/23 圈上峰 Design Sketch ©Sketch2 D=8cm 画 三司 圈上人整 Design Sketch ©Sketch2 Advantages 1.Tripod ensures its stability 己 Disavantages 1.It is not so comfortable to write under the mechanism. 2.The cost of the tripod is a little high. 10
2014/10/23 10 Shanghai Jiao Tong University Design Sketch Sketch 2 Shanghai Jiao Tong University Design Sketch Sketch 2 Advantages 1. Tripod ensures its stability Disavantages 1.It is not so comfortable to write under the mechanism. 2. The cost of the tripod is a little high