Transcript Document
Senior Design May 2011-01 Team
Andrew Nigro (EE)
Chad Hand (EE)
Luke Rupiper (EE)
Ryan Semler (EE)
Shonda Butler (EE)
Advisor: Venkataramana Ajjarapu
The objective of the senior design project is to
simulate an environment in which a wind resource
provides renewable energy. The electricity
generated from the wind turbine can be used to
power a direct load and potentially be integrated
into the Iowa State University power grid.
Problem:
◦ Previously the motor and wind turbine were coupled together on separate mounting
systems. Issues we experience with this system include bowing wood, wind turbine
movement during operation, and inaccurate coupling height.
3 Design Alternatives
◦ A full wood design (3/4” birch plywood vs. 3/4” Medium Density Fiberboard)
◦
Birch Plywood – Dense , sturdy but pricey
MDF – Dense, less flexible and susceptible to vibration, but can crack without proper bracing
A wood base with extruded aluminum mounting
Two aluminum rods braced and connected to the wood mounting board go up directly to the face of the
turbine to hold it in place.
An extruded aluminum mounting box braced and connected to the wood matches up to the two rods
bracing the turbine.
A wood base with extruded aluminum + wood board mounting
◦
Two aluminum rods braced and connected to the wood mounting board, go up directly to the face of a
board that is connected to the face of the turbine to hold it in place.
An extruded aluminum mounting box braced and connected to the wood matches up to the two rods
bracing
Materials:
◦ 3x M5x35 SS socket Head Screws ~ $3
◦ Extruded aluminum mounting brackets ~$50
◦ L brackets ~ $10
◦ ¾” MDF or Birch Plywood sheet ~ $25
◦ Round rubber gasket ~ $5
◦ 1 ½” Schedule 40 Steel Conduit – Grounded as per NEC 250.52, item 5 and NEC 250.53, item A ~$5
◦ Total Cost ~ $98
Reed Sensor
-Physical switch
-On/Off digital output
-fragile
-higher cost
Hall Sensor
-Magnetic sensor
-Linear analog output
-Prepackaged circuit
-Lower cost
-
Digital output
Powered by DAC
Switching speed up to 10kHz
Prefabricated mounting holes
Long leads
RPM Readings
Front Panel
Initial Settings:
• Initial Count
• Count Direction
• Edge
Displays:
• Elapsed Time
• RPM measurement
• Numeric
• Data
Block Diagram
Data from DAQ is
used as an input.
Uses a counter with
conditional loops
and several
mathematical
blocks for
computing
RPM
Senior Design Team SD Dec10-05 is completing their ridgeline
meteorological sensor network
◦ Self-healing mesh network consists of 3 nodes where each node includes:
Anemometer
Wind vane
Arduino microcontroller
PCB to bring the elements together
Wireless transceiver using a Xbee-Pro DigiMesh module and Conductive
Sleeve Dipole VS Whip Antenna
◦ These nodes will be placed on the roofs of Coover and Durham in order to
get the actual wind profile (speed and direction) here on campus
◦ Real-time data is collected in 1-3 second resolution in a datalogger,
averaged on 10 second intervals and transmitted through a transceiver
with a range of 1-2 km
◦ We will be provided with a transceiver in order to join the network
◦ Data will be logged in a text file that we can use to export data as needed
Data collected from the wind sensors will be
displayed in a text file
LabVIEW can import this data by analyzing each
line and then separating the values as shown below
MATLAB can also import the same data
provided to LabVIEW from the text file in
order to graphically display the wind profile
% Import the file
newData1 = importdata(fileToRead1);
%Break the data up into a new structure with one field per column.
colheaders = genvarname(newData1.textdata);
for i = 1:length(colheaders)
dataByColumn1.(colheaders{i}) = newData1.data(:, i);
end
% Create new variables in the base workspace from those fields.
vars = fieldnames(dataByColumn1);
for i = 1:length(vars)
assignin('base', vars{i}, dataByColumn1.(vars{i}));
end
• User interface for manual
control of Power supply
• Use knob to control input
voltage.
• Program balances phase with
input voltage to adjust
frequency
• Plan to make process automated
based on input wind profile
from wind sensors.
• Block Logic of motor control using LabVIEW 9.0
• Plan to have separate input block that uses data from wind
sensor to control motor speed.
Turbine & Battery Readings
Front Panel
Turbine/Battery Measurements:
• Voltage
• Current
• Power
Other Measurements:
• Total Power
Block Diagram
Various blocks for computing
turbine/battery voltage,
current, power, and overall
total power
PROJECT TIMELINE
Anticipated TASK 1
Actual TASK 1
Anticipated TASK 2
Actual TASK 2
Anticipated TASK 3
Actual TASK 3
Anticipated TASK 4
Actual TASK 4
Anticipated TASK 5
Actual TASK 5
Anticipated TASK 6
Actual TASK 6
Anticipated TASK 7
Actual TASK 7
Anticipated TASK 8
Actual TASK 8
Anticipated TASK 9
Actual TASK 9
Anticipated TASK 10
Actual TASK 10
Anticipated TASK 11
Actual TASK 11
Anticipated TASK 12
Actual TASK 12
Break
WK1
WK2
WK3
8/23-8/28
8/30-9/4
9/6-9/11
WK4
WK5
WK6
WK7
WK8
WK9
WK10
WK11
WK12
WK13
WK14
Week
WK15
WK16
WK17
9/13-9/18 9/20-9/25 9/27-10/2 10/4-10/9 10/11-10/16 10/18-10/23 10/25-10/30 11/1-11/6 11/8-11/13 11/15-11/20 11/22-11/27 11/29-12/4 12/6-12/11 12/13-12/18
Slide 3 Images:
◦ Left(Picture Courtesy of SDMay10-17)
Slide 5 Images:
◦ Left(http://www.cs.cmu.edu/~garthz/blog/80-20parts/flange_screw_interference.jpg)
◦ Right(http://www.aluminum-profiles.com/products/aluminum_extrusion.htm)
Slide 6 Images:
◦ Left(http://www.chicagosensor.com/images/HowItWorksReed.jpg)
◦ Right(http://upload.wikimedia.org/wikipedia/commons/7/7e/Hall_sensor_tach
.gif)
Slide 7 Image:
◦ http://media.digikey.com/photos/Hamlin%20Photos/55100-3H-02-A.jpg
Slide 9 Images:
◦ Left(http://www.nrgsystems.com/~/media/ProductImages/1900/1900.ashx)
◦ Right(http://www.nrgsystems.com/~/media/ProductImages/1904/1904.ashx)
Slide 10 Image:
◦ http://forums.ni.com/ni/attachments/ni/170/236901/1/read%20lines.JPG
Slide 11 Image:
◦ http://www-bml.ucdavis.edu/boon/images/qa_WindSpeed.gif