Transcript Sample Power Point Presentation 2

THE GEORGE WASHINGTON UNIVERSITY
SCHOOL OF ENGINEERING AND APPLIED SCIENCE
DEPARTMENT OF ELECTRICAL AND COMPUTER ENGINEERING
FINAL PRESENTATION
WEATHER STATION
BY
XXXXXXXXXXXX
EE XXX -11
SENIOR ELECTRICAL ENGINEERING
DESIGN PROJECT LABORATORY
Prepared for
Professor XXXXXXX
April 28th, 2000
PROJECT SPECIFICATIONS
(Hardware)
 4 Sensors
 Temperature Sensor :
 LM 335 Precision sensor (0C - 60C) + 3 C
 Barometric Pressure Sensor
 Motorola MPX4100A Pressure Sensor (24-32 inHg) + 1inHg
 Humidity Sensor
 Radio Shack M3C5 humidity sensor(0% - 100%) + 5%
 Wind Speed Sensor
 Can motor(dc motor) as a sensor (0 - 80 mph) + 5mph
SPECIFICATION (CONT)
(Hardware)
 Operate from a 110 Vrms power supply
 Display:
 LED Display for 4 sensors
 Computer Display
 Hardware device connected to PC using
Parallel Port
SPECIFICATION (CONT)
(Software)
Created using Visual Basic 5
Read the input data from parallel port and store it in
computer memory
Display real-time data
Display maximum minimum weather data
User can set an alarm for every weather data
Alarm will turn off if set alarm equal to displayed
data.
HARDWARE MODULE
Module Name
Power Supply
Temperature Sensor
Humidity Sensor
Wind Speed Sensor
Barometric Pressure
Sensor
Analog to Digital
Converter
Clock
Lookup Table
LED Display
Multiplexer
Parallel port
Wind Vane Design
Descriptions
Supply power to the project
Convert temperature data to electrical signal
Convert humidity data to electrical signal
Convert wind speed data to electrical signal
Convert barometric pressure data to electrical signal
Convert analog signal obtained from the sensors to
digital signal to go to the EPROM
Timer for ADC
Convert the electrical signal back to the weather data
Display the real time weather data
Route the selected signal to the computer memory
Interface between circuit and computer
Detect the wind speed
HARDWARE BLOCK DIAGRAM
Temperature
Sensor
ADC
Lookup Table
Temperature
LED
Display
Humidity
Sensor
Pressure
Sensor
ADC
ADC
Lookup Table
Humidity
LED
Display
Lookup Table
Pressure
LED
Display
Wind Speed
Sensor
ADC
Lookup Table
Wind speed
LED
Display
4 Input Digital
Multiplexer
Parallel Port
Driver
Computer
Interface
Computer assigns
mux address
TEMP/HUMIDITY SENSOR TO LED
DISPLAY
PRESSURE/WIND SPEED SENSOR TO
LED DISPLAY
PARALLEL PORT (PS/2)
SOFTWARE MODULE
Module Name
Menu()
Detectport()
Initialized()
Assignaddress()
Screensetup
Readdata()
Viewdata()
Setalarm()
Comparealarm()
Displayalarm
CompareHL()
DisplayHL()
StoreHL()
Utility function
Total
Descriptions
Instructions, confirm setup
Detect the port address
Initialized all the i/o pins
Assign address to mux
Set up the screen for display
Read the input data
Display real time data
Set the alarm
Compare alarm to Real
Time Data
Display alarm if set condition exceed
Compare the highest/Lowest
Data to the real time data
Display higest.lowest data
Store the highest lowest data
Other small utility function
Lines - Hours
80 – 7h
20 – 3h
20 – 3h
50 – 7h
100 – 10h
50 – 8h
170 – 15h
50 – 5h
50 – 5h
50 - 5h
80 – 7h
50 – 4h
50 – 4h
5 – 10h
800 – 93h
SOFTWARE BLOCK DIAGRAM
Initialize
I/O pins
Assign
Address
Display Data
Detect Port
Address
Menu
Confirm Setup
Read Data
Set Alarm
Compare
Highest/Lowest
Data
IF Data read =
Data Set
IF Data _new >
Data_HI ;
Data_new=
Data_HI
IF Data _new <
Data_LO ;
Data_new=
Data_LO
Display
Alarm
PHYSICAL LAYOUT
Wind
Vane
Parallel
Port Cable
Temperature
Display
Pressure
Display
Power
Humidity
Display
Wind Speed
Display
Figure 27 – Physical Layout
TEST MANUAL
•Power:
•The Voltage supply = 5 V.
•Sensors:
•Check the input voltage to ADC
•Check LED Display
•Multiplexer:
•32 input from sensors / output 8 bit
•Interface to Parallel Port:
•Check the input value = ADC value
•The complete unit
•LED Display = commercial measuring device
•Computer Display = LED Display
•alarm & hi/lo
PROTOTYPE USER MANUAL
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Product Description
Specification
How to use the product
Maintenance Procedure
Trouble Shooting Procedure
PROBLEMS
•Not enough current
•Port didn’t read correct input
•VB doesn’t have command to access port
POSSIBLE IMPROVEMENT
• Sensitive wind sensor
• Better accuracy for LED Display
• Use LCD