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Performed by Lior David and Alon Perlis Supervised by Boaz Mizrachi Summer 2011.

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Presentation on theme: "Performed by Lior David and Alon Perlis Supervised by Boaz Mizrachi Summer 2011."— Presentation transcript:

1 Performed by Lior David and Alon Perlis Supervised by Boaz Mizrachi Summer 2011

2 Agenda  Problem definition  Project objectives  Input specifications  Hardware overview  Data flow  Software design  Timeline

3 Problem Definition  The client would like to measure and analyze the effect of vehicles on road surfaces and layers Over long periods of time In various placements Automatic and manual triggering Easy data retrieval

4 Project Objectives  Design and implementation of (almost) complete system for seismic measurements Selection of suitable components Sensors integration Software framework in the form of RTOS Digital signal processing Power management (Communication)

5 Input Requirements  3 axis acceleration micro-g resolution  Temperature measurement  Communication

6 Hardware Overview PIC24FJ256GB110 Microchip microcontroller ADXL312 Analog Devices digital 3-axis digital accelerometer In-house driver for KB12VD ADC AD7682 Batteries Communication SPI KB12VD Piezoelectric Accelerometer Key pad LCD I2CI2C SD card SPI EEPROM SPI

7 Software Design  Real time, preemptive operating system for the PIC microcontroller  Modular design  Robust hardware drivers for later development  Basic signal processing

8 Software Design (cont’d)

9 Data Flow

10 Gantt Diagram מצגת איפיון מצגת אמצע מצגת סוף משימה משך מתוכנן 31/7/20 11 7/8/2 011 14/8/2 011 21/8/2 011 28/8/2 011 4/9/2 011 11/9/20 11 18/9/2 011 25/9/2 011 2/10/2 011 9/10/2 011 16/10/ 2011 23/10/ 2011 30/10/ 2011 6/11/2 011 13/11/ 2011 20/11/ 2011 27/11/ 2011 4/12/2 011 11/12/ 2011 18/12/ 2011 לימוד רכיבים וסכמת בלוקים תוכנה. הזמנת רכיבים, בניית לו"ז שבועיים נסיונות אינטגרציה ובניית מצגת איפיון שלושה שבועות לימוד סביבת הפיתוח למיקרוקונטרולר + ממשקי חומרה לדיבוג שבוע חיבור בחומרה של הרכיבים והבנת פרוטוקולים שבועיים מועדי ב' אביב מאפשר מצגת בניית מצגת אמצעשבועיים תכנות ארבעה שבועות דיבוג התוכנה והחומרה ארבעה שבועות בניית מצגת סוףשבוע הכנה למצגת סוףשבוע כתיבת ספר פרוייקטשבועיים

11 Team’s commitment  20 weekly man-hours Lior - Sunday morning and Monday 12:00- 18:00 Alon - Monday as free day and Friday as needed  Weekly meeting with the supervisor

12 How will it work? SRSSRS

13 Thank you!

14

15 System Parameters FLOW Order of execution Sampling Sampling frequency Time interval between executions Vector length resolution Signal processing Filter coefficient Maximum allowed error (for compression) Frequency trigger Event trigger Communication Packet sizes and structure Timeouts Addresses

16 Piezoelectric sensor C x = d xy F y b / a C x is the amount of charge F x is the applied Force in x direction where a is the dimension in line with the neutral axis, b is in line with the charge generating axis and d is the corresponding piezoelectric coefficient.

17 KB12VD


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