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Intelligent Environments

Intelligent Environments. Computer Science and Engineering University of Texas at Arlington. Sensors. Quantities to be sensed Sensor types Sensor characteristics Sensor installation Sensor interfacing and control Smart floor. Quantities to be Sensed. Strain and pressure

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Intelligent Environments

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  1. Intelligent Environments Computer Science and Engineering University of Texas at Arlington Intelligent Environments

  2. Sensors • Quantities to be sensed • Sensor types • Sensor characteristics • Sensor installation • Sensor interfacing and control • Smart floor Intelligent Environments

  3. Quantities to be Sensed • Strain and pressure • Position, direction, distance and motion • Light and radiation • Temperature • Sound Intelligent Environments

  4. Quantities to be Sensed • Solids, liquids and gases • Moisture (humidity) • Flow • Liquid acidity/alkalinity • Air and water quality • Smoke Intelligent Environments

  5. Sensor Types • Strain and pressure • Load • Pressure • Applications • Floors, doors, windows • Scales Intelligent Environments

  6. Sensor Types • Position, direction, distance and motion • Accelerometer • Motion • Applications • Security • Locator, tracking Intelligent Environments

  7. Sensor Types • Light, radiation and temperature • Low-profile ceiling camera • Wireless camera • Light • Radiation • Temperature • Applications • Security, location, tracking • Health safety • Energy efficiency Intelligent Environments

  8. Sensor Types • Sound • Wireless microphone • Applications • Security • Volume control • Speech recognition Intelligent Environments

  9. Sensor Types • Solids, liquids and gases • Humidity • Rain • Carbon dioxide • pH • Flow • Applications • Pool maintenance • Sprinkler efficiency • Security and health monitoring Intelligent Environments

  10. Sensor Characteristics • Operating temperature • Thermal sensitivity • Non-linearity and hysteresis • Excitation voltage and impedance • Current and power • Noise • Example: load sensor • Example: motion sensor Intelligent Environments

  11. Sensor Installation • Placement • Environment • Interference • Aesthetics • Power • 120VAC, wired DC, battery, solar • Combined with data lines (CAT5) Intelligent Environments

  12. Sensor Interfacing and Control • Interfacing • Wireless (50MHz, 900MHz, 2.4GHz, …) • Serial (9/25 wire), CAT5 (8 wire), phone (4 wire) • Coax, fiber optic • Bus (networking) • Control • Identification • Calibration • Parameter settings • “Smart” features Intelligent Environments

  13. Application: Smart Floor • Orr and Abowd, “The Smart Floor,” Georgia Tech • Identify users based on their footsteps • Not intended to be a standalone system • Load sensors • 10-15 Vdc excitation voltage • 2.2 mV output per volt of excitation • Sampled 300 times per second Intelligent Environments

  14. Application: Smart Floor • Footstep described by 10 features • Profile mean, deviation, length, area, maximum and minimum • Nearest neighbor for classification • Results seem independent of footwear • 93% recognition rate Intelligent Environments

  15. My SmartHome • Floor plan • Landscaping • Materials • Sensors • Placement, power, interfacing • Reconfigurable • Networking • Overall smart architecture Intelligent Environments

  16. My SmartHome Intelligent Environments

  17. My SmartHome • Sensors • Bedrooms • Bathrooms • Kitchen • Family room • Garage • Doors and windows • Floors, walls, roof • Utility (HVAC, water heater, washer/dryer) • Yard Intelligent Environments

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