التفاصيل البيبلوغرافية
| العنوان: |
Zippity Zigbee, zippity ay! |
| المؤلفون: |
Moss, Graham |
| المصدر: |
InTech; Jul2005, Vol. 52 Issue 7, p46-49, 4p, 1 Color Photograph, 3 Diagrams |
| مصطلحات موضوعية: |
WIRELESS communications, AUTOMATION, HEATING & ventilation industry, HOME automation, RADIO wave propagation, COST effectiveness |
| مستخلص: |
This article looks at the prospects for Zigbee, a new wireless technology, in the control and automation world. Zigbee was principally developed for the volume markets of heating, ventilation and air conditioning (HVAC), security and home automation. At its heart is an embedded low radio frequency (RF) power transceiver, powered from an integral lithium battery. Zigbee transceivers can talk to each other, passing on wireless messages. If one device fails, the mesh self-heals, re-routing messages via the next best path. Wireless sensors in HVAC means a lot more thermostats giving better control and lower energy costs. The high cost of wiring has always been a constraint to collecting the nice-to-have plant data and turning it into useful information. But Zigbee has an added implicit weakness over traditional wireless because of its reliance on the mesh. An added problem is RF propagation in an industrial environment will fade out long before a building environment. A solution to this constraint is to integrate tomorrow's technology with today's. A wireless information backbone (WIB) differs from Zigbee because it is not intended to embed into sensors but acts as a higher-level wireless network, transferring multiplexed information throughout a plant or factory. A WIB has a similar mesh capability as Zigbee but rarely needs to use it. So why is Zigbee technology needed at all? The answer: cost. Because of its mass production and simple design, Zigbee devices will be a fraction of the cost of WIB devices. |
| قاعدة البيانات: |
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