Wireless Data Acquisition System
(WiDAS)
Justin Peters
Advisor: Professor Steven Gutschlag
Senior Design Project
1
Outline
-
Background Information
-
Project Goals
-
System Parts (4)
-
Project Status
-
Future Work
-
Questions
2
Background
-
Important for mechanical engineers
-
Only Excel GUI used from legacy project
3
Project Goals
-
Intake data from various sensors with the MCU
(wheel speed, engine speed, coolant temp, etc...)(100ms)
-
Wireless communication between two wireless boards
-
GUI for Excel software
-
GUI for the Amulet color touch
-
screen
-
Easily augmentable code (C versus Assembly)
4
Overall System Block Diagram
5
System Parts
-
Microcontroller
SiLabs 8051F120DK
6
Utilization
-
100 MHz 8
-
bit processor
-
5 Timers
-
2 UARTs
-
8 A/D channels (12
-
bit)
7
MC1488
–
TTL to RS
-
232
8
SiLabs
UART
output
---
>
RS
-
232
---
>
Sensors
Sensor
Data Type
Notes
Wheel Speed (MPH)
Pulses
Wheel Sensor
Engine Speed (RPM)
Pulses
Ignition Coil
Coolant Temperature
Variable Resistor
Logarithmic In Nature
Battery Voltage
Voltage
Directly From Battery
Oil Pressure
Switch
Activated When Safe Pressure Is Not Maintained
-
Five more voltage sensors can easily be added
9
Signal Conditioning Circuitry
10
Software High
-
Level Flow Chart
11
System Parts
–
LCD Touchscreen
Amulet Color Touch
-
screen LCD
12
Communication
-
buf_test[0] = 0xE0; // write data response
-
buf_test[1] = '0';
-
buf_test[2] = '2'; // 1 & 2 for which byte
-
buf_test[3] = 'F';
-
buf_test[4] = 'F'; // 3 & 4 for what value
-
UART_put(buf_test,1);
13
Touch
-
screen GUI
14
System Parts
–
Wireless Devices
FIFO, MSK, 433 MHz, 250 kBaud
1% Packet Error per packet of 20 bytes
15
System Parts
–
WinWedge/Excel
16
WinWedge
-
Setup
17
=WinWedge|Com4!'Field(3)'
Project Status
-
All system
-
level specifications were met
-
Currently awaiting more specific sensor specs so
that the WiDAS can be implemented on the SAE
racecar
18
Future Work
-
Bi
-
directional headset communications between
wireless boards
-
Enhanced GUI for Amulet touch
-
screen
-
Enhanced GUI for off
-
track laptop user
19
Questions?
20
Microcontroller
–
Digital Crossbar
21
Enter the password to open this PDF file:
File name:
-
File size:
-
Title:
-
Author:
-
Subject:
-
Keywords:
-
Creation Date:
-
Modification Date:
-
Creator:
-
PDF Producer:
-
PDF Version:
-
Page Count:
-
Preparing document for printing…
0%
Σχόλια 0
Συνδεθείτε για να κοινοποιήσετε σχόλιο