Image Processing Reference
In-Depth Information
onthemarket,butno“wireless”powersolutions,astheavailablepowerlevelsarerather
limited within the range of allowable field amplitudes.
•
Optical Transmission: Optical power transmission is possible withibers, a focused (laser)
beam, or with diffuse lighting. In most applications, little would be gained by the replace-
ment of wires by optical fibers. Focused beams are not applicable for the supply of
many sensors dispersed throughout the automation facility/cell, where there often is no
direct line of sight. An alternative could be the simultaneous supply of the sensors in
an automation cell with a diffuse artificial lighting. However, reliability, cost effective-
ness, and customer acceptance of such a solution make it a highly questionable approach.
Even with such an approach, shadow effects cannot be excluded for general automation
applications.
Although the list of power supply technologies above is by far complete, it should provide an idea of
the various conceivable power supply solutions for WSN devices. Noticeable are the varying levels
of energy/power density and characteristics of the power supply solutions, often highly dependent
on the conditions under which they are employed. To choose a suitable technology, you thus need to
fully understand the static and dynamic power demands of your device, as well as the applications
and environmental conditions under which the device will operate. A more comprehensive overview
of various solutions is given by Refs. [,].
References
. http://en.wikipedia.org/
. http://www.isa.org/, ISA Web site.
. http://www.hartcomm.org, HART Communication Foundation Web site.
. http://www.dustnetworks.com, DUST Networks Web site.
. http://www.zigbee.org, ZigBee Alliance Web site.
.
Part .: Wireless Medium Access Control (MAC) and Physical Layer (PHY) Specifications for Low-Rate
Wireless Personal Area Networks (WPANs)
, IEEE Computer Society, IEEE, .
. http://www.profibus.com/, International PROFIBUS Web site.
. M. Ken,
Recommended Practices Guide For Securing ZigBee Wireless Networks in Process Control System
Environments
, Lawrence Livermore National Laboratory, .
. D. Dzung, G. Scheible, J. Endresen, and J.-E. Frey, Unplugged but connected: Design and implementa-
tion of a truly-wireless real-time sensor/actuator interface,
IEEE Industrial Electronics Magazine
, (),
-, Summer .
. http://www.iecex.com/index.htm, International Electrotechnical Commission for Certification to
Standards Relating to Equipment for use in Explosive Atmospheres (IECEx Scheme).
. http://ec.europa.eu/enterprise/atex/guide/, Guidelines on the application of directive //EC.
. International Standard IEC , Degrees of protection provided by enclosures (IP Code).
. www.perpetuum.com, Perpetuum Ltd. Web site.
. G. Scheible, Wireless energy autonomous systems: Industrial use?
Sensoren und Messysteme
VDE/IEEE Conference
,Ludwigsburg,Germany,March-,.
. J. A. Paradiso and T. Starner, Energy scavenging for mobile and wireless electronics, Pervasive
Computing,
IEEE CS and IEEE ComSoc
,,-,January-March.
. www.archrock.com, Arch Rock Web site.
. www.omnexcontrols.com, Omnex Controls Web site.
. www.savewithaccutech.com, Accutech Instrumentation Solutions Web site.
. Wireless Automation, www.abb.com
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Low Voltage Products and Systems
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Wireless Devices.
