Enter Dept name in Title Master Mobile Operating Vehicle Electronics- Fuel Management System...

enter Dept name in Title Master

Mobile Operating Vehicle Electronics- Fuel Management System

SDP09:Team Gao

By: Shelby Berleus, Lukasz Gawel, Karan Mendiratta, Juan Peralta

March 5, 2009

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Overview

This system allows its user to keep track of fuel consumption pattern of his car over a period of time (which may be a day, month or a year)

Displays the user different dynamic parameters of the car essentially RPM’s, Air-intake in the engine, engine temperature, fuel-injection level

The software associated in the system uses this data to draw insightful analysis on fuel consumption pattern of the user and make necessary recommendations on the most fuel efficient route to the destination.


Motivation

With crude prices increasing by the day, fuel-efficience and minimizing fuel consumption is the need of the hour

Greenhouse effect as a result fuel emissions is in direct sync with the need to monitor fuel consumption.

Create awareness regarding fuel efficient driving.

Future uses in hybrid environments where one can analyze fuel vs battery efficiency and usage


Overview: Technical Solution

The project is categorically divided as:

Car/Microcontroller interfacing.

Integrating GPS with the above.

Wireless transmission/reception of Onboard


Contd.

Diagnostics data from microcontroller to user computer laptop.

Database on user’s computer to store the received data from Microcontroller.

Software program that fetches the data from the database and makes useful analysis/recommendations & displays it to user.


Overview: Block Diagram


Information from the Vehicle

Using OBD(ALDL Connector) ELM322 chip RS-232 Arduino board


ELM322

8 Pin IC ASCII character High speed RS-232

communication reformat the OBD signals data rate @ 9600 baud 8 data bits no parity bit 1 stop bit


J1979 Standard

Every message Three header bytes Data Bytes Checksum Byte

ELM322 Takes care of this formatting for us


Data handling: Transmission, reception & storage


Modules:

- Xbee: Wireless Transmitter/ Receiver Module with USB serial connection.

- 64 MB Micro sd module for Arduino: Libelium, for storing GPS coordinates, On-Board Diagnostics data till receiver is in range and ready for transmission.


Libelium flash memory module for Arduino

File systemSD-Card formatted with FAT-16 files system with only a single partition on it.


Why 64 MB flash memory?

GPS word containing co-ordinates, elevation & speed – 4 bytes

On Board Diagnostics data word (Fuel indication and RPMs)- 2 bytes

Total data packet size= (3 bytes+ 2 bytes)= 6 bytes

We’re sampling GPS and OBD data every 1 sec.

So over a 36 hour-cross country drive data packet size= 36*60*60*6 = 0.97 MB (approx.)

64 MB flash memory such be sufficient to store data packets for multiple cross country trips.


Design: Data Transmission/ Reception


Configuring Transmitter & Receiver

One XBee will act as the receiver, it will be attached to the computer via an FTDI cable and wireless send programming commands to the receiver

We set up the other XBee so that it will listen to changes on pin D3 on the Transmitter XBee. Then we connect it to the FTDI cable and read in the current configuration.

We set the PAN ID for receiver and transmitter to be the same for the transception to take place.


Control Circuitry: Setting up Receiver

Xbee’s are weak and can’t reset the Arduino themselves, so we set up a transistor for pulling the reset line down.

We put a resistor between base and emitter to keep the Arduino from resetting accidentally.


GPS Module

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GPS Module

What is the purpose of the GPS Module

What is the accuracy of the module

Potential problem that will be solved

What will the will the GPS interface with


GPS/Arduino: Block Diagram


GPS/Arduino Code

void loop() { digitalWrite(ledPin, HIGH); // Turns on LED pin byteGPS = Serial.read(); // Reads a byte of the serial port delay(1.875); if (byteGPS == -1) { // See if the port is empty yet delay(5000); // Waits 5sec if port is empty } else { buffer[conta] = byteGPS; // If there is serial port data, it is put in the buffer Serial.print(buffer[conta]); // conta++; // if (byteGPS == 13){ // If the received byte is = to 13, end of transmission Serial.println(" END OF TRANSMISSION"); digitalWrite(ledPin, LOW); delay(3000); } for (int i = 0; i < 150; i++){ // Reset the buffer buffer[i]=' '; } }}


Deliverables

Real time data feed for things like fuel indication, RPM’s,

engine temperature.

Functional communications between On Board Diagnostics in vehicle and computer based at internal location via PAN network.

Data from the OBD will be stored on a database, used for reference and making analysis on fuel efficiency and other related parameters, and displaying it to the user.


GPS integrated to this device will enable the user to look at which roads/ route (e.g. Driving up on a slope etc.) did make his car consume more/less fuel and the related RPM’s.

Based on the past data, a software program would provide driving recommendations to achieve maximum fuel efficiency.

GUI designed for end user.

Block Diagram with high level view of M.O.V.E-Fuel Management.

23enter Dept name in Slide MasterECE 415 Senior Design Project Spring 2009

Fuel Analysis Application•Google Charts API•Google Maps API• SQL Server• .NET•PAN (802.15)


Fuel Analysis Application Charts API• Cost efficient (FREE) no integration with 3rd party software such as Microsoft Office• Allows for 250,000 calls/day• Simple send URL with data needed in certain format•http://chart.apis.google.com/chart?cht=p3&chd=t:60,40&chs=250x100&chl=Hello|World


Fuel Analysis ApplicationGoogle Maps/Earth API• Give the end user a mapping of where they drove• Also economically efficient (FREE)•Take in Long/Lat data points and draw route


Fuel Analysis ApplicationPAN Technology• Connect via PAN wireless network in order to upload data.• 500 meter range for PAN connection.• Application sends out broadcast at certain intervals looking for the device.


Cost Analysis

MicroSD Module for Arduino $22.66 Parallax GPS Module $89.99 ELM 322 $17.00 XBee Receiver/Transmitter $32.00 OBD Connector Cable $24.00 Total cost $185.65

ECE 415 Senior Design Project Spring 2009


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Enter Dept name in Title Master Mobile Operating Vehicle Electronics- Fuel Management System...

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