29-06-2012, 02:28 PM
The Practical Design of Constructing Data Transition Interface with ZigBee WSN and RS-485 Wired Interface—Example with
Small-scaled Wind-power Electricity Generator System
The Practical Design of Constructing.pdf (Size: 542.13 KB / Downloads: 43)
INTRODUCTION
Because mankind excessively consumed oil for
hundreds of years, it made the storage of oil almost
exhausted in the last one hundred years. Therefore, the
oil price has up-risen near to 100 dollars per barrel.
Because overusing of oil energy resulted in huge amount
co2 emission and greenhouse effect in the earth,
furthermore, this phenomenon made the earth more
serious condition of getting warmer and climate change.
So the issue of environment protection was regarded as
more and more essential. In December 1997, the
greenhouse gases emission constrain rules was officially
announced in Kyoto Agreement, in which clearly
assigned the emission standard of greenhouse gases.
Therefore, those electricity generators driven by heat and
its capacity being more than 500MW would be more and
more difficult to build and the distributed renewable
electricity generators such as wind-power generators
and solar become new alternatives of creating energy
resource.
Related theory and design plan
Owing to the drifting change of communication
techniques development, the brand new WSN (wireless
sensor networks) has been implemented in all data
transmission system in communication, sensors, and data
collecting application; especially in 3C products,
intelligent space. But how to take advantages of WSN
ZigBee in the small-scaled wind-power electricity
generator system is the main work in this study. We try to
combined DSP chip and high-speed SPI interface and the
WSN ZigBee communication techniques into the
small-scaled wind-power electricity generator system to
collect related running parameters for further design.
Software and hardware design
In this part we are going to describe the whole data
transmission circuits design including running
parameters both from inner wind-power electricity
generator and outer of it as well as its power
consumption system. First of all, the AC voltage (analog
signal) generated by generator would be converted
into digital signal by AD converter controlled with 8051
microprocessor which was built inner generator as shown
in Fig 8 [6].