| |
NEW IEEE
REGISTRY SUPPORTS USE OF ANALOG SENSORS IN DIGITAL NETWORKS
Contact:
Karen McCabe,
IEEE Senior Marketing Manager
+1.732.562.3824, k.mccabe@ieee.org
PISCATAWAY,
N.J., USA, 29 November 2004 The IEEE has created a registry
to support the plug-and-play use of analog transducers in networks
containing digital sensors and actuators. The registry, an extension
of the new IEEE 1451.4™ standard, offers three sets of registrations:
unique identifiers manufacturers assign to specific devices; manufacturer
identification numbers; and templates linked to the units associated
with a transducer.
IEEE 1451.4,
"Standard for a Smart Transducer Interface for Sensors and
Actuators--Mixed-Mode Communication Protocols and Transducer Electronic
Data Sheet (TEDS) Formats," establishes a universal system
for the information digital networks needed to identify, characterize,
interface with and use signals from analog sensors. The standard
fosters the use of sensor networks by simplifying their installation,
creation and maintenance.
The TEDS formats
specified in the standard are self-identifiers usually placed
in chips embedded in sensors and actuators. Each TEDS node supplies
the data a network needs to identify a device and interpret what
is in its memory. TEDS formats are written in the Template Description
Language given in IEEE 1451.4. The standard defines templates
for commonly used devices, e.g., accelerometers, microphones,
strain gages and thermocouples. A company or user can apply to
the IEEE to create new templates.
The IEEE registry
allocates unique registration numbers (URN) and manufacturer identifiers
for use in TEDS formats. Each URN has an 8-bit family code to
designate the type of device, a 48-bit serialization field to
identify the individual device, and an 8-bit redundancy check
code to verify communication integrity. Transducer manufacturers
install a 64-bit URN in each unit they make. Serial numbers for
URNs are bought in blocks of
4,096 numbers from the IEEE Registration Authority.
"The
new registry for IEEE 1451.4 transducer identifiers makes the
1-Wire(TM) protocol we invented broadly available throughout industry,"
says Hal Kurkowski, Managing Director, Automatic Information Business
Unit of Dallas Semiconductor/ Maxim. "We've assigned a large
portion of the URN pool to the IEEE Registration Authority so
each sensor in a multi-drop network can have a unique address."
Additional
details on IEEE Standard 1451.4 registration is available at
http://standards.ieee.org/regauth/1451/index.html. The site
reviews the IEEE 1451.4 standard and how to implement it. It also
includes sections on TEDS formatting and URNs, the Template Description
Language, how to obtain manufacturer identifiers and URNs, payment
methods, and frequently asked questions.
The IEEE 1451
family of standards offers common interfaces for sensors, actuators,
instruments and networks so transducers are interoperable and
interchangeable. Other members of this family in addition to IEEE
1451.4 are:
- IEEE 1451.1™,
which addresses the overall network and how to link transducers
in systems and networks;
- IEEE 1451.2™,
which looks at how to place digital transducers on a network;
- IEEE 1451.3™,
which is a multi-drop standard that allows for
placing many transducers on the same cable; and
- IEEE P1451.5™,
which is under development, will be like 1415.3 but allow for
wireless transducer communications.
IEEE 1451
standards are sponsored by the IEEE Instrumentation and Measurement
Society.
About the
IEEE
The IEEE has
more than 360,000 members in approximately 175 countries. Through
its members, the organization is a leading authority on areas
ranging from aerospace, computers and telecommunications to biomedicine,
electric power and consumer electronics. The IEEE produces nearly
30 percent of the world's literature in the electrical and electronics
engineering, computing and control technology fields. This nonprofit
organization also sponsors or cosponsors more than 300 technical
conferences each year. Additional information about the IEEE can
be found at http://www.ieee.org.
IEEE
802.11, 802.11j are trademarks of the IEEE. All other names or
product names are the trademarks, service marks or registered
trademarks of their respective holders.
# # #
|
|
