embedded systems seminar fall 2005 elliot jaffe n.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
Vehicular Technologies PowerPoint Presentation
Download Presentation
Vehicular Technologies

Loading in 2 Seconds...

play fullscreen
1 / 27

Vehicular Technologies - PowerPoint PPT Presentation


  • 483 Views
  • Uploaded on

Embedded Systems Seminar Fall 2005 Elliot Jaffe. Vehicular Technologies. Sensors, Networks and Processors. Applicable Vehicles Potential Uses Aside: Automotive equipment lifecycle Networking Processing Sensors Conclusions. Applicable Vehicles. Potential Uses. Lifecycle Management

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Vehicular Technologies' - paul2


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
sensors networks and processors
Sensors, Networks and Processors
  • Applicable Vehicles
  • Potential Uses
  • Aside: Automotive equipment lifecycle
  • Networking
  • Processing
  • Sensors
  • Conclusions
potential uses
Potential Uses
  • Lifecycle Management
    • Equipment Monitoring, Maintenance, Performance
  • Awareness of the Environment
    • Weather Conditions, Air Pressure, Road Surface
  • Awareness of the Operators
    • Physical State, Mental State, Comfort
  • Global vs. Local Interactions
    • Convoys, Traffic Planning, Collision Detection
automotive component lifecycle
Automotive Component Lifecycle
  • Long lead times between conception and wide spread deployment
  • Case in point: Anti-Lock Brakes (ABS)
    • Bosch 1930’s
    • First Electronic system in production: 1978
      • Trucks and Mercedes-Benz
    • Standard Equipment – 1985 (Ford Grenada Mk3)
    • GM stops offering ABS as Standard Equipment on most of its 58 vehicles in 2003
automotive component requirements
Automotive Component Requirements
  • Low Cost
  • Mass Production (availability, liability)
  • Dependability (reliability, safety)
  • System Modularity
  • Easy Field Maintenance
  • Simple MMI (drivers are not experts)
  • Security (against prohibited actions)
automotive component lifecycle1
Automotive Component Lifecycle

Source: Integrated Vehicle Control System Technology — Steering, Braking, Suspension, and Powertrain Systems, Aloysius J. (Alois) Seewald, TRW Automotive Chassis

networking
Networking
  • Many bus definitions
    • http://www.interfacebus.com/Design_Connector_Automotive.html
    • Class A: UART < 10kbps
    • Class B: non-critical 10kbps to 125kbps
    • Class C: real-time high-data: 125kbps – 1Mbps
    • Emissions/Diagnostics
    • Mobile Media
    • X-By-Wire: replace mechanical systems
      • -40  +125C
examples
Examples
  • LIN- local interconnect network
    • http://lin-subbus.org
    • 20Kbps
    • Master/slave architecture
  • CAN – controller area network (ISO 11898)
    • http://www.ni.com/automotive/can.htm
    • High speed: 1Mbps
      • Engine and powertrain
    • Low speed: 128kbps
      • Body and comfort devices
networking1
Networking
  • X-By-Wire Architecture
    • Proposed by Consortium in 1996-1998
    • Time Triggered Protocol (1993)
    • Considered failure modes and requirements
    • Composability
    • Timeliness
    • Fault Tolerance
    • http://www.vmars.tuwien.ac.at/projects/xbywire/projects/new-home.html
processing
Processing
  • First Microprocessor, 1978 Cadillac Seville
    • Trip Computer, 6802
  • Freescale (Motorola) MPC563 32bit microprocessor
    • 63-105 MIPS
    • -40C – 125C
    • 2.6V Core Operating Voltage
    • 5V I/O Operating Voltage
    • 0.8, 1.12W Power dissipation (typical, max)
    • 512K Flash RAM, 32K RAM
    • 32 Channel A/D (10 bits)

Source: www.freescale.com

sensors
Sensors
  • Engine and Drivetrain Sensors
  • Emissions Control System Sensors
  • Safety and Security Sensors
  • Other Internal Sensors
engine and drivetrain sensors
Engine and Drivetrain Sensors
  • Throttle Position
    • Monitors the position of the accelerator pedal and the throttle linkage, so the ECM can make accurate air/fuel mixture adjustments
  • Barometric Air Pressure (BAP
    • Reads changes in barometric (air) pressure. The ECM uses this information to adjust timing advance and air/fuel ratio
  • Mass Air flow/ MAF
    • Measures the amount of air drawn through the engine's air intake, so the computer can compensate for altitude and temperature
engine and drivetrain sensors1
Engine and Drivetrain Sensors
  • Permanent magnet vehicle speed sensor
    • A permanent magnet generator
    • Produces a pulsing (ac) voltage when it spins
    • Voltage level and number of pulses increase with vehicle speed
  • Knock / Detonation
    • Listens for engine "ping" so the ECM can retard the spark timing, and thereby reduce emissions and overheating, if the engine is knocking
engine and drivetrain sensors2
Engine and Drivetrain Sensors
  • Magnetic Fluid Level
    • Used for brake fluid, coolant, washer fluid and oil level sensing
  • Temperature
    • Air Temperature
    • Coolant Temperature
    • HVAC Temperature
    • Transmission Temperature
emission control sensors
Emission Control Sensors
  • Required due to emission control legislation
  • EGR Valve
    • Recalculates a measured amount of exhaust gas into the engine's air intake, to lower combustion temperatures and reduce emissions, especially NOx
  • Ported Vacuum Switch
    • Senses engine temperature, and opens or closes vacuum lines to various emissions-related components
safety and security sensors
Inertial Sensors

active stabilization and navigation applications

Wheel Speed

Occupant Position

Weight

Driver Seat Position

Tire Inflation

Safety and Security Sensors
other interior sensors
Other Interior Sensors
  • Climate Control Systems
  • Ambient Air Temperature
  • Seat Temperature
  • Air Flow
  • Audio Volume (for Active Feedback)
  • Ambient Light (for auto-tint)
external sensors
External Sensors
  • DARPA Grand Challenge
  • http://www.darpa.mil/grandchallenge/TechPapers/AutonomousVehicleSystems.pdf
  • Range Finding
  • Obstacle Detection
  • Terrain Detection
range finding
Range Finding
  • RADAR
    • Radio Detection and Ranging
  • LADAR
    • Laser Detection and Ranging
  • SONAR
    • Sound Navigation and Ranging
conclusion
Conclusion
  • Applicable Vehicles
  • Potential Uses
  • Aside: Automotive equipment lifecycle
  • Networking
  • Processing
  • Sensors