3D road mapperMID presentation

Annual project (Part A)Semester 2014b

Students: Hen Markovich Aharon

Ya’akov

Supervisor: Boaz Mizrahi

Introduction - Mobiwise

• 3D Road mapping.

• Learning the specific vehicle performance.

• Prediction of the expected path.

• Computing the optimal fuel consumption.

• Real time indication to the driver.

The main goal - fuel saving by a unique method:

Block diagram

Barometer

Accelerometer

Flash

EEprom

Micro controller

Vehicle computer

Analog entrances

Host(+GPS)

Main database

Android app

HUD

General view

OBD

HUD

Android app

Our project is here

Project goal• Design and product a hardware for this application.

• The HW will be divided to two separated boards:

a. The main board which contains the microcontroller, the sensors and memory.b. A peripheral board which contains the connections to the OBD, the host and the power supply.

• The first module is the “vehicle processor” and this is the component that should be sold.

• The second module will be the base for exemplification and debug.

• The two boards should be packed into a small size plug.

Detailed schema

Bluetooth

UART

Cellular

MCU

UART/USB

I 2C

I 2C

Microcontroller

Sensors Pressure sensor

Accelerometer

HS CAN Transceiver

Power

DC/DC LDOVehicle Battery – 12/24 V

5 V 3.3 V

OBD II – 16 pinsCAN High

CAN Low

Tx/Rx

Memory

Flash

EEPROMSPI

SPI

Wireless Bluetooth module

UART/SPI

3.3 V

HUD

Host (+GPS)

Main database

Analog

Fuel level

Ignition

BatteryDebug

ICSP

Components BarometerSmall, low cost, accurateDigitalLess than 1m resolution

Flash memory256MBit.SPI interface.

Bluetooth moduleContains an integrated antenna.UART interface.

AccelerometerDigital accelerometer at 3 axisSmall, low cost1mg accuracy

EEPROM256KBit.SPI interface.

CAN TransceiverProvides interface between CAN protocol controller and differential CAN BUS.

PIC MicrocontrollerCAN controller for CAN protocol.CAN, UART, USB, SPI & I2C interfaces.

MCU MicroChip PIC32MX795F512H

• Internal memory• 512KB Flash ROM• 128KB RAM

• Max speed: Up to 80MHz

• Ports: SPI, I2C, CAN, UART, USB

• Modes: Run, Idle, Sleep

• Size: 10X10X1 mm

Sensors• Barometer Bosch BMP180

• Measures height from -500m to +9000m• Measure accuracy of 17cm• I2C interface

• Accelerometer Freescale MMA8451Q

• Digital accelerometer at 3 axis• Max resolution of 1/4096 g• Self test mechanism• I2C interface

Memory• EEPROM MicroChip 25LC256

• 256Kb• Max clock: 10MHz• SPI interface

• Flash Micron N25Q256A

• 256Mb• Max clock: 108MHz• SPI interface

Power supply • Vehicle battery – 12v/24v

• The system must get a constant power supply Independently with the battery voltage.

• The HS CAN Transceiver needs 5v supplied by a DC/DC converter.

• All other components need 3.3v supplied by Concatenated LDO.

• Both devices are adjusted by a simple voltage divider.

What we did until now?• Learning:

• Market research• Parts• Protocols

• Orcad design• Main parts design• Electrical design• Logical design

• Mechanical design (in process)

ScheduleLearning 23.3 – 5.4Characterization 6.4 – 19.4Orcad Design 20.4 – 24.5Mid Semester Presentation 25.5 – 1.6Finish the logical design 1.6 – 6.6and mechanic design Circuit edition 8.6 – 27.6Production 22.6 – 13.7Assembling 15.7 – 19.7End of part A