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

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

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

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

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

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

Last Fall’s Design

Accelerometer

MEMS Accelerometer

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

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

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

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

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

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

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

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

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

Non-Technical Positions Project Management Personnel Non-Technical Positions

Personnel Technical Positions Project Management Personnel Technical Positions

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

Project Management Schedule

Project Management Schedule

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

Thank You! Any Questions?