Umbrella check-out system

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Revision as of 13:04, 5 December 2008 (view source) Changhoo (Talk | contribs) (→First Prototype) ← Older edit		Revision as of 13:10, 5 December 2008 (view source) Changhoo (Talk | contribs) (→Second Prototype) Newer edit →
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	====Second Prototype====		====Second Prototype====
	Changes for our second prototype.		Changes for our second prototype.
		+	-cardswipe activates electronic system
		+	-motor to power turnstile - will be replaced with worm drive to prevent backturning
		+	-also plan to add an encoder for better accuracy
		+
		+	-ventilation holes in side of box
		+	-ramp on inlet for umbrellas
		+	-removable drip tray
		+	-purchased umbrellas for use in system, cost: ~$3 each, lathed handles to fit unit
		+
		+	-evaluated barcode scanning
		+	-difficult and expensive to interface with microcontroller
		+	-now looking at RFID scanner from Parallax
		+
		+	-quantitative analysis
		+	-People counting, Markov model, computer vision tracking
		+	-big results: major entrances will need to carry ~2-300 umbrellas, gives us a ballpark of number of units necessary at those locations
		+
	====Final Concept====		====Final Concept====
	Differences between our second and final prototypes.		Differences between our second and final prototypes.

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Revision as of 13:10, 5 December 2008

Final Wiki outline for ED2

Contents 1 Executive Summary 2 Design 2.1 Objectives and Opportunities 2.2 Physical Design 2.3 Distribution and Placement 2.4 Failure Modes 2.5 Manufacturing and Production 2.6 Prototype History 2.6.1 First Prototype 2.6.2 Second Prototype 2.6.3 Final Concept 3 Analysis 3.1 Comparison of Alternatives 3.2 Quantitative Analysis: Traffic Study 4 Conclusions

Executive Summary

Design

Objectives and Opportunities

Why we believe that this is a feasible idea, user study quotes

Physical Design

Component design, and how the unit operates.

Distribution and Placement

Discuss how units would be placed and distributed.

Failure Modes

FMEA table

Manufacturing and Production

DFMA details, production volume

Prototype History

Discuss changes in our design through time.

First Prototype

Our initial prototype was designed to be a small modular unit with a simple design and low part count. The flat sides allow multiple units to be placed next to each other for an umbrella distribution with many locations to withdraw and deposit umbrellas. The ramp on the top of the device moves umbrellas efficiently from the receiving end to the dispensing end with no additional mechanical input from the system. The low number of powered parts allows the device to be reliable. The only places where the umbrellas need to be actively dealt with by the system are the input and output chutes,

Second Prototype

Changes for our second prototype. -cardswipe activates electronic system -motor to power turnstile - will be replaced with worm drive to prevent backturning -also plan to add an encoder for better accuracy

-ventilation holes in side of box -ramp on inlet for umbrellas -removable drip tray -purchased umbrellas for use in system, cost: ~$3 each, lathed handles to fit unit

-evaluated barcode scanning -difficult and expensive to interface with microcontroller -now looking at RFID scanner from Parallax

-quantitative analysis -People counting, Markov model, computer vision tracking -big results: major entrances will need to carry ~2-300 umbrellas, gives us a ballpark of number of units necessary at those locations

Final Concept

Differences between our second and final prototypes.

Analysis

Comparison of Alternatives

QFD, etc can go here.

Quantitative Analysis: Traffic Study

Summarize our findings here, link back to main analysis page

Conclusions