|
My Articles Free Templates, Scripts, Ringtones
Recent Research on Sensor Networks and Smart Environment
- Most Recent Conferences on Sensor Networks and Pervasive Computing
- Recent Sensor and Sensor Networks Industry News
|
|
|
|
|
|
Sensor Network Hardware Platform
Mica2/Mica2Dot/MicaZ/Telos
Mica2, Mica2Dot, and MicaZ motes are currently the most advanced versions of the COTS motes. The motes have lower power consumption, radio interface with better noise immunity, better radio range and different power down modes. With an AA battery system Mica2/Mica2Dot lifetime can be up to 17.35 months when the system components are used effectively. However, current trend is moving towards the 802.15.4 radio motes (such as MicaZ, TelosB) instead of Mica2. Two benefits are: smaller antennas, and they are legal to operate in the US and the rest of the world because they run in the 2.4 GHz band. The Mica2's are not exactly "legal" to operate in the US and perhaps other parts of the world. However, with little modifications to Mica2Dot programs, the implementation should run effectively with Micaz.
Radio Range
Following are some data about radio range of Mica2/Mica2Dot motes. Practical experiments show much difference with crossbow specifications. For Mica2/Mica2Dot, we might assume reliable range to be around 100-150ft radius. According to the specifications provided above, radio range for both Mica2 and Mica2Dot in outdoor environment is: 500-1000 feet radius.
[Krasnewski:04]Mica2/Mica2dot: In an open field: 106 feet +/- 2 feet (maximum range). In a small valley (sides 6-7 feet tall): about 116 feet. In an indoor hallway: 200 feet.
In the 900 MHz radio: up to 35m (with standard antenna) in an open field (1m height off the ground) and where motes are set on full power.
GATEWAYS
Crossbow (xbow.com) has developed specilized gateway for sensor networks based on (Mica/Mica2/Micaz) called Stargate ‘Gateway’. Stargate gateway (along with the Mote Interface Boards (MIB)) can provide interfaces among Motes and PCs, PDAs, the WWW, and existing wired/wireless networks and protocols.
MOTES / RADIOS
The motes are battery-powered devices that run Crossbow's XMesh self-forming, micro-power, networking stack. In addition, each Mote runs the open-source TinyOS operating system. TinyOS provides low-level event and task management.[www.xbow.com]
Application Area For Motes [www.xbow.com]
- Indoor/Outdoor Environmental Monitoring
- Security and Tracking
- Health and Wellness Monitoring
- Power Monitoring
- Inventory Location Awareness
- Factory and Process Automation
- Seismic and Structural Monitoring
Sensor Network Softwares
For Mica Platform MOTE-VIEW 1.0 Data Logging and Monitoring UI
MOTE-VIEW is a software tool that provides graphical interface and client application between a user and a deployed network of wireless sensors motes. To read details about moteviw click here
Important Links on Sensor Hardware
Faqs about Motes
How does Mica2/Mica2Dot radio modules work?
Data Size?
What MAC algorithm is used on the your-favorite-mote Mote?
"Mostly CSMA. One version found on stacks before 1.1.3 and B-MAC found on radio stacks from 1.1.3"
Read Details about Mote MAC Protocol
Sign Guestbook View Guestbook
Home | justEtc Forum | justEtc Web Chat | Career with justEtc | News | E-commerce | Useful Links | Contact
