ELECTRONIC BLOCKS FOR BASIC SENSOR-BASED SYSTEMS
~SYSTEM DESIGN AND PROBLEMS
OVERVIEW
Material Review
Design Objective
System Concept
Challenge and Problems
Future Plan
MATERIAL REVIEW
E-Block:
To let non-technical user to setup a sensor base system.
Simple system setup.
Suitable for simple applications.
Cost effective towards specific application
Wired or wireless sensor base system.
MATERIAL REVIEW
Wireless Sensor Network
A sensors network consist of multiple sensor node.
A wireless solution.
Implement network topology in the system.
Unattended operation.
Node capacity is scalable.
DESIGN OBJECTIVE
Integrate e-blocks into a wireless sensor network.
E-block Wireless Sensor network that can setup easily by user.
Provide simple and low cost solution.
SYSTEM CONCEPT
Simple e-block application:
Reference from the e-block simulator
http://www.cs.ucr.edu/~eblock/simulator/v2.4/index.ht ml
SYSTEM CONCEPT
e-block in a simple network.
Identity on each node required
SYSTEM CONCEPT
Implement e-block in wireless sensor network
Example sensor network using mesh topology:
SYSTEM CONCEPT
Previous e-block:
Sensor
Logic/State
Communication
Output
Current e-block in 3 main parts:
Sensors part
Node part
Output part
SYSTEM CONCEPT
Sensors part:
Output Data:
Binary output (ON or OFF)
Numerical output
Non-binary type sensor
Example: temperature sensor
SYSTEM CONCEPT
Node part:
a) Multiplexer
Receive multiple inputs b) Data Processing Unit
Process data and data passing c) Communication Unit
Wireless
Using ZigBee or similar type of communication protocol called MiWi from Microchip Technology.
The MiWi is a simple protocol specifically designed for low data rate, short distance,low-cost networks.
Fundamentally based on IEEE 802.15.4 standard.
SYSTEM CONCEPT
Output part:
Binary type such as LED or Buzzer
Numerical type such as LCD
Computer
SYSTEM CONCEPT
To implement e-block in wireless sensor
network, communication part is the main
concern.
CHALLENGE AND PROBLEMS:
To achieve the objective of allow simple wireless sensor network setup.
Setup in a complex network.
Steps needed to allocate nodes identity.
CHALLENGE AND PROBLEMS:
Network concern:
Type of network topology
Multi-hop routing algorithm
FUTURE PLAN
Study of several protocol stack for our design.
Main focus on MiWi protocol stack
Initial stage of e-block electronics design.
