Adaptive Light Control and Monitoring

1

• Adaptive Light Control and Monitoring
• System based on Sensor Networks
• Presented by
• Dimanche Assane Laina (?? 9213634)
  dimassane_at_yahoo.fr
• ???(9312570)jwill0425_at_gmail.com
• ???(9312574)isaacliu0312_at_gmail.com
• ???(9312553)victor0909_at_gmail.com

2
Outlines

• Motivation
• Adaptive Light Control and Monitoring System
  based on Sensor Networks (ALCMS) Advantages
• ALCMS Architecture
• System Analysis
• References

3
Motivation

• ALCMS is a low-voltage light control delivers
  state-of-the-art lighting automation with
  unprecedented commercial lighting control.
• The core of a mote is a small, low-cost,
  low-power computer.
• Stand-alone or networked, ALCMS is perfect for
  all commercial and residential applications.
• It's also less costly, more flexible, and easier
  to use and maintain than any other lighting
  control method available.

4
ALCMS Advantages

• Nonpolarized Two Wire Bus Flexible architecture
  for simple installation and system updates. Does
  not require special wiring.
• Programmable Switches Define or redefine the
  programming of any switch at any time with our
  wireless infrared addressing unit.
• Scalable Systems Multiple transmission units can
  provide virtually unlimited system expansion.

5
System Architecture
6
System Analysis(1)

• We connect sensors to a mote that can collect the
  information of brightness and log it in the
  mote's memory. (for example road electrification
  lamps application )
• The computer connects to the outside mote world
  with a radio link. The most common radio links
  allow a mote to transmit at a distance of
  something like 3 to 61 meters.

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System Analysis(2)

• Personal Computer is added to the system for easy
  operation and monitoring.
• When the microprocessor 8051 gets the command
  from the base-station (PC) through the RS-232
  interface, it makes the light controlling signal
  to regulate the bulb brightness according to the
  command.

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System Analysis(3)

• The controlling signal made by the 8051 is a
  digital signal, but we have to use an analog
  signal to adjust the brightness. Therefore, the
  digital-to-analog converter (DAC) is used in this
  system.
• The DAC is a device widely used to convert
  digital pulses to analog signals.
• We use the DAC0800 chip to convert the pulses to
  analog current signal, and then we can get the
  voltage signal by adding electronic circuit.

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System Analysis(4)

• The brightness of the LED bulb is changed by
  providing different voltages, so we can easily
  regulate the brightness through 8051 with the DAC
  module.
• We will develop a synthesizable model with C/C
  in our demo to monitor the system state and the
  8051 microprocessor is based on assembly
  language.

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Conclusion

• The LED bulb we used is for DC low power
  consumption lamp. This is a trend to use many LED
  bulbs instead for a big scale lamp.
• The whole system is simple, flexible and
  scalable. Its also easy to realize and maintain
  with cheap hardware equipments.
• We use both wireless and wired medium.
• The system can be implemented for indoor or
  outdoor applications.

11
References

• 1 Gay, Levis, et al., The nesC language A
  holistic Approach to Network embedded Systems,
  To appear in Proceedings of Programming Language
  Design and Implementation (PLDI) 2003. June 2003.
  Also available on the web at http//today.cs.berk
  eley.edu/tos/papers/necs.pdf
• 2 David patnode, Joseph Dunne, Aleksander
  Malinowski, Donald Schertz, "WISENET-Tiny Based
  Wireless Network of Sensors, Department of
  Electrical and Computer Engineering Bradley
  University, Peoria, Illinois 61625, USA
• olekmali_at_ieee.org, http//cegt201.bradley.edu/ol
  ekmali/