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An open standard API and its respective libraries have been developed in order to be able
to control the sensor nodes in a transparent way not only for the management of the sensors,
but also for the communications used in the physical layer.
Finally a functional sensor network has been implemented in a car environment
satisfactorily controlling a number of sensors between which the ECG sensor has been the
strangest but at the same time the most valuable sensor to monitor the wellness and comfort
of the passenger.
The previous photo shows the demonstrator panel fabricated in order to explain the main
feature provided by this technology, which is the easy way to interchange transducers
connected to different channels in any sensor node (STIM), only downloading the proper
TEDS from the NCAP to the corresponding STIM.
C ONCLUSIONS
The goals of this sensor network have been satisfactorily achieved. A functional sensor
network has been implemented based on Bluetooth communications and IEEE 1451 family of
standard protocols.
The system that has been built in this project has helped to implement an application that
is able to control and manage a number of sensors in a transparent way, regardless of the
physical communication used in the lower layers and regardless of the physical characteristics
of the sensors.
The use of Bluetooth communications has helped to easily implement the sensor network
in a car environment due to the wireless characteristic of the communication. The bandwidth
and data transfer rates provided by Bluetooth has been far enough to satisfactorily measure all
the sensors at real time.
From another point of view the use of IEEE 1451 family of standard protocols has been
very useful. The data structures, the transducer access interface and the transparent
communication interface provided by the standard family have been the key features for the
success of the entire sensor network.
Last but not least, an open software library and its respective API have been developed to
access the sensor network using a Linux based computer.
R EFERENCES
Bluetooth Special Interest Group. Specification of the Bluetooth system , URL
www.bluetooth.com.
Lee, K.B. Schneeman, R.D. Distributed Measurement and Control Based on the IEEE 1451
Smart Transducer Interface Standards, IEEE transaction on Instrumentation and
Measurement. Volume 49, Issue 3, Pages 621-627.
Song, E.Y. Lee, K.B. 2008. STWS: A Unified Web Service for IEEE 1451 Smart
Transducers, IEEE transaction on Instrumentation and Measurement. Volume 57, Issue
8, Pages 1749-1756.
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