Transcript Automated Spray Patternator Team 14

Automated Spray
Patternator
Team 14
Kevin M. Agnew
Greg Barber
David Rubin
Design Concept Review
• Background
• Mission Statement
• Customers:
– wants, constraints
• Benchmarking:
– system
– functional
•
•
•
•
Metrics / Target Values
Generated Concepts
Concept Selection
Schedule
– expected vs. actual
• Budget
Background
• Function of a Spray Patternator
• Problems with current DuPont Patternator:
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–
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Low Accuracy
Human Error
Insufficient Resolution
High Reset Times
Limited To One Nozzle
Mission Statement
To develop and test an automatic spray
patternator with high accuracy, improved
resolution, a minimal amount of human
error, test reset time, and allowing superior
flexibility.
Prioritized Customer List
• Dupont Agricultural Research Team
– Larry Gaultney
– Ted Lang
– James Davis
• George Wicks
• Dr. Leonard Schwartz
• Dan Coppens (Anholt Technologies Inc.)
• Joseph Buckley (Cherry Hill Mercedes)
Top 10 Prioritized Wants
1. Provide All Desired
Outputs
2. Automated Data
Collection System
3. Observe interaction of
2 or more Nozzles
4. Comply with
Hardware/Software
Standards
5. High Accuracy and
Resolution
6. Run on Tap Water
7. Be able to test 110°
nozzles
8. Modular Design
9. Accurately Locate
Nozzle Position
10. Mobile with in Lab
Constraints
• 54” Door Width
• Safety Guidelines
(OSHA,DOSH)
• Senior Design Project
Schedule
Quality Metrics / Target Values
1) Data Collection System Cost
2) Table Length
3) Total System Cost
4) Fluid Reservoir Volume
5) Table Width
6) Nozzle Spacing Increment
7) Accuracy Of Data Acquisition
8) Collection Container Size
9) Nozzle Height Increment
$5,000.00
12Õ
$10,000
5 gal
51Ó
1/2Ó
<1ml
>100 ml
1Ó
Quality Metrics / Target Values
10) Number of Human Inputs
11) Range of Nozzle Height
12) Resolution of Pressure Measurement
13) Width of Collection Channels
14) Test Duration
15) Table Weight
16) Test Reset Time
17) Number of Water Additives
18) Maximum Fluid Pressure
6
20-30”
1 psi.
2.5 cm
30-180 sec
500 lb
5 min.
0
60 psi.
System Benchmarks
• Current DuPont Spray Patternator
• Hardi Inc.
– Field Patternator
– Laboratory Patternator
• Transportable Spray Patternator
– (Patent)
• Spray Systems Co.
– Laboratory Patternator
Hardi Field Patternator
Functional Benchmarking
Collection Software
Data Collection Method
LabView
Measure
Image Pro Plus
Laser Imaging
Flow Rate
Float Level Sensor
Water Sensitive Paper
Fluid Supply
Pressure Regulator
Pressure Transducer
Solenoid Valves
Reservoir
Table Design
Current DuPont table design
V-grooved table
Initial Design Concepts
Data Collection Design
Function: To measure water distribution
• Level Detection (Using graduated cylinders)
– Manual Reading
– Pressure Sensors
– Laser Imaging
• Flow Detection
– In-Line Flow Meters
• Image Acquisition
– Filter Paper
Flow Meter
Initial Design Concepts
Table and Water Collection Design
Function: To capture water being sprayed from nozzle and
separate into measurable quantities
• 2-Dimensional Design
– V-Grooved Table Top
– Square Channels (dividing walls)
• 3-Dimensional Design
– Flat Table (Filter Paper design)
– Honeycomb
Initial Design Concepts
Water Supply System
Function: To supply pressurized water to the nozzles
• Reservoir
– Water Tank
– Tap
• Test Stop System
– Solenoid Valves
– Cylinder Covers
• Pressure System
– Water Pump
– Air Pressure Source with Regulator
Comparison of Conceptual
Designs
SSD Performance
37.14
22.54
-0.66
-11.26
-23.18
Current
Design
3D Pattern
3D Pattern
(Filter Paper) (Honeycomb)
2D Pattern
(Level)
2D Pattern
(Flow)
Concept Selection
• Data Acquisition System
– Pressure Sensors
• high accuracy (0.5mL)
• relatively inexpensive (~$27.00)
• allows for simpler design of
water supply system
• Collection Software
– LabView
• compliant with DuPont software/hardware standards
– Measure
• allows direct input of data into Microsoft Excel
Concept Selection
• Table Design:
– Square channel with aluminum dividing walls
• simpler construction
• less splashing
• 1” spacing of walls gives desired resolution
– Graduated Cylinders
• necessary for the use of pressure sensors
Concept Selection
• Water Pressure System
– Pressure Pot
• air readily available
• pressure can be regulated
– Solenoid Valves
• acts as automatic shut-off
• eliminates residual spray
– Pressure Gauge
• inexpensive
• simplifies design
Material List
• Table
– HDPE sheet
– aluminum sheet
– 80 graduated cylinders
• Water system
– tubing
– pressure gauges
– solenoid valves
– pressure regulator
– water reservoir
• Data Acquisition
– 80 pressure sensors
– National Instruments
hardware
• Frame
– aluminum C-channel stock
– aluminum square stock
Budget
• Estimated Shop Hours: 100
– 100 hours X $30/hr
• Data Acquisition System
– National Instruments
hardware and software
– Pressure Sensors
• Structural Materials
– aluminum C-channel/square
stock
– HDPE sheet
• Water System
– Reservoir
– Regulator/Gauges
– Solenoids Valves
– Tubing
$3000.00
$9980.00
$607.71
$816.45
Total = $14,404.16
Schedule
Task
Estimated Schedule
Actual Schedule

Want Identification
9/17 – 9/30
9/17 – 11/1

Benchmarking
9/17 – 10/17
9/17 – 11/14

Problem Identification
9/17 – 9/24
9/17 – 9/24

Metric Identification
10/1 – 10/29
10/1 – 10/29

Metric Comparisons
10/14 – 11/24
10/14 – 11/1

Preliminary Design
9/17 – 11/24
9/17 – 11/24

Concept Development
10/27 – 11/19
10/27 – 11/19

Concept Refinement
11/2 – 11/24
11/2 – 11/19

Concept Elimination
11/15 – 11/24
11/7 – 11/24

Consulting
9/17 – 5/15
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Tentative Spring Schedule
– Winter
• Order parts and materials
– Spring
• February
– get final approval from DuPont
– finish ordering materials/parts
• March - April
– wait for parts to arrive
– machine parts for assembly
• April - May
– assemble prototype and test
– modify design (if necessary)
Summary
• Final Design
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–
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80 graduated cylinders w/pressure sensors
Square collection channels
Pressure pot water supply w/solenoid valves
LabView and Measure for data acquisition
• Total Cost
– ~$15,000
• Expected Completion Date
– April 1999