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Performed by Lior David and Alon Perlis Supervised by Boaz Mizrachi. Smart Road Sensor PDR presentation. Summer 2011. Agenda. Problem definition Project objectives Input specifications Hardware overview Data flow Software design Timeline. Problem Definition. - PowerPoint PPT Presentation
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SMART ROAD SENSOR
PDR PRESENTATIONPerformed by Lior David and Alon Perlis
Supervised by Boaz Mizrachi
Summer 2011
Agenda Problem definition Project objectives Input specifications Hardware overview Data flow Software design Timeline
Problem Definition The client would like to measure and
analyze the effect of vehicles on road surfaces and layersOver long periods of timeIn various placementsAutomatic and manual triggeringEasy data retrieval
Project Objectives Design and implementation of (almost)
complete system for seismic measurementsSelection of suitable componentsSensors integrationSoftware framework in the form of RTOSDigital signal processingPower management(Communication)
Input Requirements 3 axis acceleration
micro-g resolution Temperature measurement Communication
Hardware Overview
PIC24FJ256GB110Microchip
microcontroller
ADXL312Analog Devices
digital 3-axis digital accelerometer
In-house driver for KB12VD
ADCAD7682
Batteries
CommunicationSPI
KB12VDPiezoelectric
Accelerometer
Key padLCD
I2C
SD card
SPIEEPROM
SPI
Software Design Real time, preemptive operating system
for the PIC microcontroller Modular design Robust hardware drivers for later
development Basic signal processing
Software Design (cont’d)
Data Flow
Gantt Diagramמצגת
איפיון
מצגת אמצ
עמצגת סוף
משימה משך מתוכנן
31/7/2011
7/8/2011
14/8/2011
21/8/2011
28/8/2011
4/9/2011
11/9/2011
18/9/2011
25/9/2011
2/10/2011
9/10/2011
16/10/2011
23/10/2011
30/10/2011
6/11/2011
13/11/2011
20/11/2011
27/11/2011
4/12/2011
11/12/2011
18/12/2011
רכיבים לימודבלוקים וסכמתהזמנת. תוכנה
" ז, לו בניית רכיביםשבועיים
אינטגרציה נסיונותאיפיון מצגת ובניית
שלושה שבועות
סביבת לימודהפיתוח
למיקרוקונטרולר + חומרה ממשקי
לדיבוג
שבוע
של בחומרה חיבורוהבנת הרכיבים
פרוטוקוליםשבועיים
מועדי אביב' ב
מאפשר
מצגת
אמצע מצגת בניית שבועיים
תכנות ארבעה שבועות
התוכנה דיבוגוהחומרה
ארבעה שבועות
סוף מצגת בניית שבוע
סוף למצגת הכנה שבוע
ספר כתיבתפרוייקט שבועיים
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
How will it work?
SRS
QUESTIONS?Thank you!
BACKUP SLIDES
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
Piezoelectric sensor
Cx = dxyFyb / a
Cx is the amount of chargeFx is the applied Force in x directionwhere 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.
KB12VD