Transcript Your Title - Eastern Mediterranean University (EMU), Cyprus

 Overview
 A wireless sensor network (WSN) is a wireless network
consisting of spatially distributed autonomous devices using
sensors to cooperatively monitor physical or environmental
conditions, such as temperature, sound, vibration, pressure,
flow, level, motion or pollutants, at different locations.
 Wireless sensor networks are now used in many industrial
and civilian application areas, including industrial process
monitoring and control, machine health monitoring,
environment
and
habitat
monitoring,
healthcare
applications, home automation, and traffic control
What it is?
 Unique characteristics of a WSN include:
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Limited power they can harvest or store
Ability to withstand harsh environmental conditions
Ability to cope with node failures
Mobility of nodes
Dynamic network topology
Communication failures
Heterogeneity of nodes
Large scale of deployment
Unattended operation
Applications
Applications
Applications
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Application
 50 nodes on 4th floor
 5 level ad hoc net
 30 sec sampling
 250K samples to database over 6 weeks
 Sensor nodes
 Nodes can be imagined as small computers, extremely basic in
terms of their interfaces and their components. They usually
consist of a processing unit with limited computational power
and limited memory, sensors (including specific conditioning
circuitry), a communication device (usually radio transceivers or
alternatively optical), and a power source usually in the form of
a battery.
 Base Station
 The base stations are one or more distinguished
components of the WSN with much more
computational, energy and communication
resources. They act as a gateway between sensor
nodes and the end user.
 Wireless Sensor Network Advantages
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Wireless systems allow for widespread energy saving, enabling
preventative maintenance for reduced unplanned downtimes,
increasing productivity, and saving on wiring costs—all with
lower upfront investments versus a wired system.
 Wireless Sensing Solution
 Wireless Sensing Solutions are a new means to satisfy
demanding data measurement requirements in a range of
industrial environments. Without the use of common cables,
power supplies or data acquisition equipment, our selfpowered real-time solutions can be as remote and customized
as you need them to be.
 Providing accurate data in remote and at times unsafe
locations, wireless sensors measure, record and transmit
data—in real time—in critical applications such as oil and gas
drilling, food and beverage production, metal fabrication and
machining, chemical, paper and pulp processing, along with
other manufacturing applications. Built for durability, sensors
can withstand the harsh and dirty conditions of these often
dangerous and hazardous environments.
 TinyOS is a free and open source component-based
operating system and platform targeting wireless sensor
networks (WSNs).
 TinyOS is an embedded operating system written in the
nesC programming language as a set of cooperating tasks
and processes. It is intended to be incorporated into
smartdust.
 TinyOS started as a collaboration between the University of
California, Berkeley in co-operation with Intel Research
and Crossbow Technology, and has since grown to be an
international consortium, the TinyOS Alliance.
 Wireless Instrumentation
 Wireless Instrumentation
 Wireless instruments will not replace those in traditional
wired (4 to 20 mA or fieldbus) installations but, in many
ways, they complement traditional versions by offering an
economical solution for difficult applications.
 Initial applications of wireless instrumentation will be for
monitoring processes and managing assets. Some time in the
future, wireless instrumentation may be used in control
applications but this will require modification to PID
algorithms, appropriate risk analysis and good, fail-safe
design practices.
 Select wireless instrumentation if you need to:
 Monitor instrument condition remotely
 Re-range or carry out instrument configuration changes
remotely
 Monitor process data that has been uneconomical to
measure in the past
 Monitor process data over a short term to solve process
problems
 WirelessHART is a wireless mesh network communications protocol for process
automation applications. It adds wireless capabilities to the HART Protocol while
maintaining compatibility with existing HART devices, commands, and tools.
 Low cost installation
 Low risk upgrade
 Reduced configuration time
 Improved production
 Improved maintenance
 Highly secure communication
 Low Power and Energy
 Compatible with other systems base on HART applications
TinyOS-2.x
 A nesC application consists of one or more
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components assembled, or wired, to form an
application executable.
A component provides and uses interfaces.
There are two types of components in nesC: modules
and configurations.
Modules provide the implementations of one or more
interfaces.
Configurations are used to assemble other
components together, connecting interfaces used by
components to interfaces provided by others.
TinyOS-2.x
 BlinkAppC.nc
configuration BlinkAppC {
}
implementation {
components MainC, BlinkC, LedsC;
components new TimerMilliC() as Timer0;
components new TimerMilliC() as Timer1;
components new TimerMilliC() as Timer2;
BlinkC -> MainC.Boot;
BlinkC.Timer0 -> Timer0;
BlinkC.Timer1 -> Timer1;
BlinkC.Timer2 -> Timer2;
BlinkC.Leds -> LedsC;
}
TinyOS-2.x
BlinkC.nc:
module BlinkC {
uses interface Timer<TMilli> as Timer0;
uses interface Timer<TMilli> as Timer1;
uses interface Timer<TMilli> as Timer2;
uses interface Leds;
uses interface Boot;
}
implementation {
event void Boot.booted() {
call Timer0.startPeriodic( 250 );
call Timer1.startPeriodic( 500 );
call Timer2.startPeriodic( 1000 ); }
event void Timer0.fired() { call Leds.led0Toggle(); } event void Timer1.fired() {
call Leds.led1Toggle(); } event void Timer2.fired() { call Leds.led2Toggle(); }
}
TinyOS-2.x
 As a conclusion It’s clear to understand that any
changes from conventional to high-tech systems will
lead to increase the performance of the system,
simplicity and decreasing the cost of implementation.
 On the other hand, in the harsh environment,
utilizing the WSNs are preferred.
End of Part 2