Umbrella check-out system
From DDL Wiki
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Discuss changes in our design through time. | Discuss changes in our design through time. | ||
====First Prototype==== | ====First Prototype==== | ||
| - | Our initial prototype was designed to be a small modular unit with a simple design and low part count. The flat sides of the device allow multiple units to be placed next to each other for an umbrella distribution with multiple locations to take out and return umbrellas. The body of the device was built with wood material and painted red. The ramp on the top of the device, which was made of low-friction teflon material, moves umbrellas quickly from the receiving end to the dispensing end with no additional mechanical input from the system. Keeping the number of the device low 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,<br> | + | Our initial prototype was designed to be a small modular unit with a simple design and low part count. The flat sides of the device allow multiple units to be placed next to each other for an umbrella distribution with multiple locations to take out and return umbrellas. The body of the device was built with wood material and painted red. The ramp on the top of the device, which was made of low-friction teflon material, moves umbrellas quickly from the receiving end to the dispensing end with no additional mechanical input from the system. Keeping the number of the device low 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. For the input chute, there was a latch attached to torsional spring to make sure that umbrellas cannot taken out from the receiving end once they are returned. Also, for the output chute, a turnstile was implemented to make sure that one umbrella is taken out at a time.<br> |
[[Image:prototype1.jpg|300px]]<br> | [[Image:prototype1.jpg|300px]]<br> | ||
Revision as of 14:38, 5 December 2008
Final Wiki outline for ED2
Contents |
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 of the device allow multiple units to be placed next to each other for an umbrella distribution with multiple locations to take out and return umbrellas. The body of the device was built with wood material and painted red. The ramp on the top of the device, which was made of low-friction teflon material, moves umbrellas quickly from the receiving end to the dispensing end with no additional mechanical input from the system. Keeping the number of the device low 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. For the input chute, there was a latch attached to torsional spring to make sure that umbrellas cannot taken out from the receiving end once they are returned. Also, for the output chute, a turnstile was implemented to make sure that one umbrella is taken out at a time.
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
