SPARTA

SPARTASPecial Asset Real-time Tracking AidSponsored by: Kevin Priest and Cubic Corporation

Submitted to J. Kennedy and L. TummalaDesign Co. Ltd, San Diego, CA

Design Engineers:Matthew Den Herder

Jason FullenDaniel Martinez

James SparksKellyne Winchester

Gustavo BarriosAdrian CedenoEduardo Ceja

German OntiverosMichael Rueda

Dale Steen

Overview

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Xperia arc Software Flow

What is ANT? ◦Wireless Networking Protocol◦Collection and tracking of Sensor Data

Why ANT?◦Engineered for Efficiency◦Reliable Data Communications◦Low Power and low cost

Wireless ANT

ADK Software Flow

ADK (Seeed Studios ATMega2560 with integrated Host Shield)

Example Iridium Connector Shield

RS-232

SMC Software Flow

Master Node Communication

Sensor Node MSP430 Embedded Software Flow Diagram

Humidity Sensor•Thermoset polymer, three layer capacitor construction

•Integrated Resistive Temperature Detection for Temperature Correction

•Condensation-Resistant Hydrophobic Filter

Honeywell

3-Axis, 8-bit Digital Accelerometer (I2C)

±2g/±4g/±8g dynamically selectable full-scale

Output Data Rates (ODR) from 1.56 Hz to 800 Hz

Two programmable interrupt pins for seven interrupt sources

Automatic ODR change for Auto-WAKE and return to SLEEP

Accelerometer

16 PIN QFN3 mm x 3 mm x 1 mm

Block Diagram

I2C communication Simple barometer with digital output and high

performance Accurate to ±1 kPa over the 50 kPa to 115 kPa

pressure range Write Mode

◦Start sequence->7bit slave address | slave ACK then writes

Read Mode◦Starts with Start sequence -> Stop Condition

Pressure Sensor

Block Diagram

Pcomp = a0+(b1+c11*Padc+c12*Tadc)*Padc+(b2+c22*Tadc)*Tadc

Where: Padc is the 10-bit pressure output of the MPL115A ADC, Tadc is the 10-bit temperature output of the MPL115A ADC, a0 is the pressure offset coefficient, b1 is the pressure sensitivity coefficient, c11 is the pressure linearity (2nd order) coefficient, c12 is the coefficient for temperature sensitivity coefficient (TCS), b2 is the 1st order temperature offset coefficient (TCO), c22 is the 2nd order temperature offset coefficient.

Pressure Calculation

Light SensorVishay/SemiconductorsTEMD6010FX01

Anode

Cathode

o Ambient Light Sensor Miniflat SMD

o Dimensions (L x W x H in mm): 4 x 2 x 1.05

o PIN photodiode type

o High speed and high photo sensitivity in a clear, surface mount plastic package.

o Peak sensitivity wavelength at 540 nm.

o Conversion will be done using the internal A/D Converter of the MSP430.

o Light will be measured in different levels: Detecting Low level, Medium level, and High level light.

Moisture Sensor

MSP 430MoistureSensor

Three Options of Sensor:o Two Rodso Two Copper Tracks on

PCBo Wires between paper

sheets

o The conversion will be done using the internal Comparator of the MSP430 MCU.

o Sensor dimensions may vary and are dependent on the required conditions.

Placement Functionality

◦Connection◦How it works◦What it tests◦What it reports

Door State Sensor

Main Board Schematic

BudgetItem Team Cost

Xperia arc Master $495.64ADK Master $119.27Iridium Master $664.95GSM Plan Master $70.00MISC Master $106.51Subtotal 1 Master $1456.37Light Sensor Sensor $14.45Pressure Sensor Sensor $76.21Accelerometer Sensor $150.00Hall Effect Sensor Sensor $13.00Humidity Sensor Sensor $40.84Subtotal 2 Sensor $294.50Total SPARTA $1750.87Budget $3475.00

!! UNDER BUDGET !! $1724.13

Master Node Team Progress Update◦ Software for ANT communication between phone and ANT USB device◦ Software for Socket communication between phone and SMC◦ Software for Phone communication with ADK Board

Sensors Node Team Progress Update◦ Sensor Node Sensor Board Schematics◦ Software for I2C communications between I2C sensor and MSP430◦ Software for Sensor node MSP430 sleep/interrupt timing◦ Sensor Node Power budgets and battery life calculations (Battery

Selection)◦ Software for ADC on MSP430 working with Light/Moisture Sensor◦ Software for Comparator on MSP430 working with Moisture Sensor◦ SPI communication working on MSP430

Milestones Completed

Milestones to be CompletedMaster Node Team

◦ Master Node Schematics and Power Supply Testing◦ Software for data display for user◦ Software for Iridium communication with ADK board

Sensors Node Team Progress Update◦ Microcontroller Board◦ All Sensors Boards and Microcontroller boards working together.◦ Microcontroller sending measurement data to Radio◦ Microcontroller receiving threshold data from Radio◦ Sensor Nodes Assembled with Cases◦ Sensor Node sending/receiving measurements and thresholds to and

from the sensor management center

Questions?