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FLIGHT DATA RECORDER FOR THE AMERICAN FOOTBALL Mechanical Engineering Final Project Masters of Engineering Chris J. Nowak.

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Presentation on theme: "FLIGHT DATA RECORDER FOR THE AMERICAN FOOTBALL Mechanical Engineering Final Project Masters of Engineering Chris J. Nowak."— Presentation transcript:

1 FLIGHT DATA RECORDER FOR THE AMERICAN FOOTBALL Mechanical Engineering Final Project Masters of Engineering Chris J. Nowak

2 Project Introduction Why Put something like this … in something like that ?

3 Background Information Accelerometer Accelerometer ADXL250ADXL250 +/- 50g Sensitivity +/- 50g Sensitivity Microcontroller Microcontroller PIC16F876PIC16F876 20Mhz 20Mhz 5 Internal A/D converters 5 Internal A/D converters Flash Programmable Flash Programmable SEEPROM SEEPROM AT25640AT25640 Memory Device that can store 4096 bytes of data Memory Device that can store 4096 bytes of data SPI interface SPI interface

4 Accelerometer Information ADXL250 ADXL250 +/- 50g Sensitivity Analog Output 0.39g Resolution as Configured Can be increased by scaling the total range 8-bit Data Points

5 Microcontroller Information PIC16F876 PIC16F876 Programmed in PicBasic Pro Programmed in PicBasic Pro

6 Electronics Plan – A 1 Microcontroller – PIC 16F877 1 Microcontroller – PIC 16F877 4 Accelerometers – ADXL202, ADXL210, ADXL250 4 Accelerometers – ADXL202, ADXL210, ADXL250 8 x 128k 8 x 128k SRAM Memory SRAM Memory Microcontroller Accelerometers SRAM

7 Electronics Plan – B 4 Identical Modules 4 Identical Modules 1 Microcontroller – PIC16C7171 Microcontroller – PIC16C717 1 Accelerometer – ADXL2501 Accelerometer – ADXL k SEEPROM Memory Chips2 32k SEEPROM Memory Chips Simple Modular Design Simple Modular Design Poor Selection of Microprocessor Poor Selection of Microprocessor Microcontroller Accelerometer SEEPROM

8 Final Electronics Layout 2 Identical Modules 2 Identical Modules 1 Microcontroller - PIC16F876 1 Microcontroller - PIC16F876 2 Accelerometers – ADXL250 2 Accelerometers – ADXL250 4 SEEPROM Memory Chips – AT SEEPROM Memory Chips – AT25640 Microcontroller Accelerometers SEEPROMs

9 Installation in the Football Plan A used a modified hard plastic Football Phone Plan A used a modified hard plastic Football Phone Plan B was abandon prior to packaging Plan B was abandon prior to packaging Plan C used a modified Nerf football Plan C used a modified Nerf football

10 Test Matrix Collect a 1g baseline data set by holding the ball so the X, Y, and Z axis were each subjected in turn to the Earths gravity Collect a 1g baseline data set by holding the ball so the X, Y, and Z axis were each subjected in turn to the Earths gravity Throw football in a tight spiral Throw football in a tight spiral Lob football in and end-over-end tumble Lob football in and end-over-end tumble

11 Test Results Baseline Data Baseline Data

12 Test Results Forward Pass Forward Pass

13 Test Results End-Over-End Tumble End-Over-End Tumble

14 Design Recommendations Improve PC-Football Serial Interface Improve PC-Football Serial Interface Reduce the weight of the electronics by using more surface mount components Reduce the weight of the electronics by using more surface mount components Reduce size/weight of batteries or find alternative power source Reduce size/weight of batteries or find alternative power source Add additional EEPROM chips to increase sample rate Add additional EEPROM chips to increase sample rate Scale accelerometers to +/- 15 Gs Scale accelerometers to +/- 15 Gs

15 Flight Data Recorder for the American Football ANY QUESTIONS ??


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