Automated Belt Loader Evan Kellogg, Nan Sun, Andrew Wadsworth Faculty Advisor: Prof. William Leonard...
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Transcript of Automated Belt Loader Evan Kellogg, Nan Sun, Andrew Wadsworth Faculty Advisor: Prof. William Leonard...
Automated Belt LoaderEvan Kellogg, Nan Sun, Andrew Wadsworth
Faculty Advisor: Prof. William Leonard
Department of Electrical and Computer Engineering
ECE 415/ECE 416 – SENIOR DESIGN PROJECT 2012
College of Engineering - University of Massachusetts AmherstSDP 12
Block Diagram
ABeL
Belt
Pressure Sensors
Motor
Luggage
PCB ATMega32
8-bit Timer with PWM
EEPROM
Power Circuit
Power Circuit
Belt
Pressure Sensors
Motor
5VDCSignal
5VDCSignal
PWM PWM
20VDC 20VDC
AbstractAnyone who has travelled via plane has noticed the extremely inefficient and possibly damaging manner in which bags are handled at an airport. If a luggage handler is behind while unloading luggage from an airplane, he/she must manually stop the belt, proceed to unload the luggage, and once caught up manually flip the switch to start the belt again. If a luggage handler were attempting to load/unload the plane as fast as possible he/she may be inclined to mishandle the traveler's luggage, potentially causing damage to their property. Our proposed system will eliminate both these situations, resulting in a more efficient way to load/unload luggage from airplanes.
Acknowledgements:• Russell Tessier,
Christopher Salthouse, Alfred Defonzo, &
William Leonard• T.B. Soules & Michael Zink• The ECE Department• Fran Caron• Sean Klaiber & M5 Staff
PCB Design
The PCB layout designed in EagleCAD
The final PCB after etching and the soldering of
components
A view of ABeL after construction,prior to enclosing it
Requirements• The system must be able to autonomously vary
belt speeds in order to reduce the amount of distance between luggage
• The system must be able to accurately sense the luggage’s location
• The system must be able to operate at an incline of at least 20 degrees
• The motors’ speeds must be able to reach the desired set point in under 2 seconds
• The height of the bottom of the system should be between 2ft and 3.5ft
Production CostAlthough it was our aim to replace existing belt loading systems, our system is scaled back due to size and budget constraints. The following totals represent the amount of $500 budget that was spent, and the total amount it would cost to reproduce our system with new components.
Project Total• Treadmills (2): $20• Pressure Mats (4): $160• Electronics (FETs, diodes, etc.): $10
A total cost of $190 was spent on parts
Reproduction Cost• PMDC Motors (2): $300• Pressure Mats (4): $160• Electronics (FETs, diodes, etc.): $15• Frame Materials (Wood/Metal): $150• Power Supply: $200• Building Materials (screws, wires, etc.): $30• PCB Fabrication: $20
In order to reproduce our project with new, professional components, it would likely cost around $875.
ABeL
From Left to Right: ABeL, Nan Sun, Andrew Wadsworth, William Leonard, & Evan Kellogg
State Chart Diagrams
Control Flow
Data Flow
ExperimentsExperiments were designed and performed in order to determine the efficiency of our system. In order to compare with contemporary systems a chip that ran ABeL with no pressure input and ran both belts at the same speed.
Average Time to Unload System (20 Pieces x 5 Trials)
Project DescriptionThe goal of this project is to create a more efficient belt loading systems than ones that exist today. With this project, our team wants to provide an automated belt loading system, partitioned into various belts, each operating at various speeds. Currently, belt loading systems operate at a single operating speed and must be manually turned off when the user is running behind. Our system would be a solution to this problem by utilizing sensors at discrete points along the belts and using this data to automatically stop, slow down, or speed up each belt.
Average Distance Between Luggage (20 Pieces x 5 Trials)
1 2 3 4 50
20406080
100120140
ABeL Existing
Trial
Se
co
nd
s
ABeL Exist
Avg. 78.6 104
Stdev 7.4 15
Std. Error ±3.3 ±7
1 2 3 4 50
0.5
1
1.5
2
2.5ABeL Existing
Trial
Fa
lls
ABeL Exist
Avg. 1 0
Stdev 0.7 0
Std. Error ±0.3 ±0
1 2 3 4 50
5
10
15
20
25
ABeL Existing
Trial
Inc
he
s
ABeL Exist
Avg. 13.9 24.8
Stdev 8.2 7.1
Std. Error ±0.8 ±0.7
1 2 3 4 502468
1012
ABeL Existing
Trial
Inc
he
s
ABeL Exist
Avg. 7.6 7.9
Stdev 1.3 1.9
Std. Error ±0.6 ±0.8
Average Distance of Luggage from Edge (20 Pieces x 5 Trials)
Luggage Falling off Edge of System (20 Pieces x 5 Trials)