Sensors In Automobiles

8.221 Aufrufe

Veröffentlicht am

Sensors In Automobiles - Information is collected from various sources including Wikipedia,and others.The file above may be a edited or modified version of an already uploaded file on the internet such as on any other website or so.

Veröffentlicht in: Technologie
  • Als Erste(r) kommentieren

Sensors In Automobiles

  1. 1. Oil sensor Water coolant temperature Oxygen sensor Fuel level Accelerometer Seat belt tension Passenger Occupancy Wheel speed Speedometer Tire pressure monitor Radar sensor Rain sensor Anti thief sensors Parking sensor Indoor/outdoor temperature sensors GPS Tachometer Odometer
  2. 2.  Oxygen sensor  Oil sensors  Fuel gauge Dip - stick
  3. 3.  Miniature voltage generator  Compare the exhaust O2 level and outside air O2 level
  4. 4.  On-board oil sensors and oil analyzers installed  Oil pressure: Hydrostatic force per unit area  Age of the oil in the engine: dielectric constant of the oil. Parallel plate capacitor separated by oil. An oil dielectric tester correlates to the acidity of the oil and indicates the level of oil degradation
  5. 5.  Inaccurate due to its mechanism, shape of fuel tank  Gauge: resistance ↑, current ↓, bimetallic cools, straighten out, pull needle form full to empty.  Newer car: resistor output into a microprocessor – compensate shape of tank  Damping needle movment up hill , down hill , Float turn
  6. 6.  They are proximity sensors.  These system feature ultrasonic proximity detectors. An Audi A4 B7 Avant 2.0 TDI Parksensor
  7. 7.  Left figure shows a tachometer that can show up to 7000 RPM
  8. 8.  Speed  Wheel speed  Engine ignition timing  Tahometer  Odometer
  9. 9.  Transmission and driveshaft rotate → mandrel too → permanent magnet rotate → rotating magnetic field → force act on speed cup → electrical curretn flows (Eddy current) → drag torque → needle rotate same direction as magnetic field • Transmission output rotate with a toothed metal disk at the end • Stationary detector covers a magnetic coil • Teeth move past the coil “interrupt” the magnetic field → series of pulses sent to computer
  10. 10.  Distance indicator. LCD Digital Odometer Blue Display from 2000 Jeep Grand Cherokee Laredo.
  11. 11. An another (specifically neon) Odometer.
  12. 12.  For ABS one need to know the speed of each wheel
  13. 13.  Modern accelerometers based on simplest MEMS design  Mass-damper-spring  Air bag deployment system – rapid negative acceleration  Electronic stability control Si tether
  14. 14.  Two capacitator configuration  Measure difference between two capacitance
  15. 15. RF communication with on board computer
  16. 16. Simplest form, it is nothing but one or more sensors connected to some sort of siren Most modern car alarm systems:  An array of sensors that can include switches, pressure sensors and motion detectors  A siren, often able to create a variety of sounds so that you can pick a distinct sound for your car  A radio receiver to allow wireless control from a key fob  An auxiliar y batter y so that the alarm can operate even if the main battery gets disconnected  A computer control unit that monitors everything and sounds the alarm -- the "brain" of the system
  17. 17.  In a closed-circuit system, the electric circuit is closed when the door is shut. This means that as long as the door is closed, electricity can flow from one end of the circuit to the other. But if somebody opens the door, the circuit is opened, and electricity can't flow. This triggers an alarm.  In an open-circuit system, opening the door closes the circuit, so electricity begins to flow. In this system, the alarm is triggered when the circuit is completed
  18. 18.  Breaking glass has its own sound frequency  Air pressure brief change as door open, windows break, even if the inside outside pressure is the same
  19. 19.  Detects radar/laser signals  Try to disturb the reflected waves  Emits jamming signals  Warn the driver
  20. 20.  Car radar detector (Japanese)
  21. 21.  Vehicle will be fitted with sensors that can detect potential collisions and take action  Firm claims 'nobody will be killed or injured in a new Volvo by 2020'  The headline of dailymail.uk (as on 5th Dec,2012) read “Volvo develops the 'no death' car: Vehicles which drive themselves and are totally crashproof could be on British roads in eight years.”
  22. 22. Future Concepts
  23. 23. THANK YOU!

×