1. Instrumented Sensor Technology, Inc
Karl Anderson
Timothy Carroll
Shuhan Chen
Corey Fox
Eric-John Kohler
Daniel Svoboda
Dr. Hayder Radha, Facilitator
Greg Hoshal, Sponsor Contact

2. Overview Introduction Background Design specifications
Design solutions
Risk analysis
Budget
Project management

3. The G-Force Meter Monitor the g-forces that the sensor experiences
Will be done by the use of an accelerometer
Works in a single axis
Monitor the linear acceleration
Two Modes
Real Time
Peak/Hold

4. Operating Modes Real Time Mode Peak/Hold Mode
Will display the maximum g-force reading over a 15 second interval
Also will display the RMS value
Peak/Hold Mode
Will display and hold the maximum g-force reading while the device is turned on
Can be reset by use of a “reset” button

5. Applications Possible uses include:
Calculate simple laboratory measurements
In-plant machinery monitoring
Shipping and transportation of large and fragile pieces of equipment
Size should be comparable to the size of a cell phone
Parts cost should be ~$10

6. Existing Accelerometer Applications
Vehicle acceleration, vibration
Body acceleration in biology study
Machine monitoring, building structure monitoring
Step counter
Smartphone
Image stabilizing

7. Last Fall’s Design

8. Accelerometer

9. MEMS Accelerometer

10. Design Parameters Measurement capabilities Range: +/- 17g
Resolution: 0.04g
Accuracy: +/- 3%
Rate: variable, 1kHz max
Time: 15s sliding time window

11. Design Parameters (contd.)
Qualitative Features
Mode selection
Real time and Peak/Hold
Display
Battery life
30+ days on 2 AA batteries
Size
Comparable to a cell phone

12. Evaluating Design Parameters
Critical parameters
Measurement capabilities
Mode selection
Battery life
Flexible parameters
Size
Cost

13. Hardware Diagram MCU LCD Status LEDs Momentary Switches Regulator
Accelerometer
Momentary
Switches
Memory
Display Driver
Regulator
Batteries
Status
LEDs

14. Microcontroller – TI MSP430
Ultra-Low Power
230μA at 1MHz, down to 2.2V
0.5μA standby
Two 16-bit timers
16 I/O pins
10-bit ADC

15. Accelerometer – Freescale MMA
4.25 – 5.75V Supply
Linear Output
100mV/g sensitivity

16. LCD – Microtips 8x2 Display
Excellent Compatibility
Controller uses popular Hitachi data interface
Appropriate size based on customer specifications
Highly interchangeable

17. Risk Analysis Defective microcontroller No display on LCD
Short circuit
No display on LCD
Low battery
Excessive current
Step up converter
Inaccurate measurements
Misplacement of accelerometer

18. Budget Total $10.10 Part Price per unit (500+) Accelerometer $3.22
Microcontroller
$1.16
LCD Screen
$5.72
Total
$10.10

19. Non-Technical Positions
Project Management
Personnel
Non-Technical Positions

20. Personnel Technical Positions
Project Management
Personnel Technical Positions

21. Project Management Resources/Facilities
ECE 480 lab
Electrical testing equipment
Instrumented Sensor Technology Inc.
G-Force testing equipment
Device components
Accelerometer, microcontroller, LCD screen, PCB
Software
TI Code Composer Studio, Eagle

22. Project Management Schedule

23. Project Management Schedule

24. Summary IST and Project Definition Accelerometer
Evaluation of design parameters
Final design decisions
Money allocation
Project management

25. Thank You!
Any Questions?