21-04-2012, 12:00 PM
Bluetooth Based Smart Sensor Networks
BLUETOOTH-BASED-SMART-SENSOR-NETWORKS.pdf (Size: 208.32 KB / Downloads: 111)
Introduction
The communications capability of devices and continuous transparent
information routes are indispensable components of future oriented automation
concepts. Communication is increasing rapidly in industrial environment even at
field level.
In any industry the process can be realized through sensors and can be
controlled through actuators. The process is monitored on the central control room
by getting signals through a pair of wires from each field device in Distributed
Control Systems (DCS). With advent in networking concept, the cost of wiring is
saved by networking the field devices. But the latest trend is elimination of wires
i.e., wireless networks.
Wireless sensor networks - networks of small devices equipped with
sensors, microprocessor and wireless communication interfaces.
In 1994, Ericsson Mobile communications, the global telecommunication
company based in Sweden, initiated a study to investigate, the feasibility of a low
power, low cost ratio interface, and to find a way to eliminate cables between
devices. Finally, the engineers at the Ericsson named the new wireless technology
as “Blue tooth” to honour the 10th century king if Denmark, Harald Blue tooth
(940 to 985 A.D).
The goals of blue tooth are unification and harmony as well, specifically
enabling different devices to communicate through a commonly accepted standard
for wire less connectivity.
Blue Tooth
Blue tooth operates in the unlicensed ISM band at 2.4 GHZ frequency band
and use frequency hopping spread spectrum technique. A typical Blue tooth device
has a range of about 10 meters and can be extended to 100meters. Communication
channels supports total bandwidth of 1 Mb / sec. A single connection supports a
maximum asymmetric data transfer rate of 721 KBPS maximum of three channels.
Smart Sensor Node Architecture
The architecture shown in figure can easily be developed for specific sensor
configurations such as thermocouples, strain gauges, and other sensor technologies
and can include sensor signal conditioning as well as communications functions.
CONCLUSION
Blue tooth represents a great chance for sensor-networked architecture.
This architecture heralds wireless future for home and also for industrial
implementation. With a blue tooth RF link, users only need to bring the devices
with in range, and the devices will automatically link up and exchange
information.
BLUETOOTH-BASED-SMART-SENSOR-NETWORKS.pdf (Size: 208.32 KB / Downloads: 111)
Introduction
The communications capability of devices and continuous transparent
information routes are indispensable components of future oriented automation
concepts. Communication is increasing rapidly in industrial environment even at
field level.
In any industry the process can be realized through sensors and can be
controlled through actuators. The process is monitored on the central control room
by getting signals through a pair of wires from each field device in Distributed
Control Systems (DCS). With advent in networking concept, the cost of wiring is
saved by networking the field devices. But the latest trend is elimination of wires
i.e., wireless networks.
Wireless sensor networks - networks of small devices equipped with
sensors, microprocessor and wireless communication interfaces.
In 1994, Ericsson Mobile communications, the global telecommunication
company based in Sweden, initiated a study to investigate, the feasibility of a low
power, low cost ratio interface, and to find a way to eliminate cables between
devices. Finally, the engineers at the Ericsson named the new wireless technology
as “Blue tooth” to honour the 10th century king if Denmark, Harald Blue tooth
(940 to 985 A.D).
The goals of blue tooth are unification and harmony as well, specifically
enabling different devices to communicate through a commonly accepted standard
for wire less connectivity.
Blue Tooth
Blue tooth operates in the unlicensed ISM band at 2.4 GHZ frequency band
and use frequency hopping spread spectrum technique. A typical Blue tooth device
has a range of about 10 meters and can be extended to 100meters. Communication
channels supports total bandwidth of 1 Mb / sec. A single connection supports a
maximum asymmetric data transfer rate of 721 KBPS maximum of three channels.
Smart Sensor Node Architecture
The architecture shown in figure can easily be developed for specific sensor
configurations such as thermocouples, strain gauges, and other sensor technologies
and can include sensor signal conditioning as well as communications functions.
CONCLUSION
Blue tooth represents a great chance for sensor-networked architecture.
This architecture heralds wireless future for home and also for industrial
implementation. With a blue tooth RF link, users only need to bring the devices
with in range, and the devices will automatically link up and exchange
information.