Introduction to Sensor Node Seminar Topic:
Actually sensor nodes were developed in 1998 in smart dust project. The main aim of this project is making of communication between cubic millimeters autonomously. The goal is to completely integrate in a single package for the purpose of wireless communication between devices. It has large motes builded using available peripherals and one of the motes is RF mote which is capable of 60-feest distance communicating and it also have some sensors like humidity, temperature, light intensity, vibration.
The architecture of this device include
- Micro controller
- External memory
- Power source
The micro controller controls the functions of other components in sensor node. The micro controller is best choice for sensor node. The flexibility in device and less power consumption is the best feature in it. For the general purpose micro controller the power consumption is more than that of micro controller
ISM band is used by sensor node which gives free radio with huge spectrum allocation and global validity. Both transmitter and receiver are integrated in one device called transceiver. The operational states include transmit, sleep, idle.
The memory is used to store the data in flash chip and application related data is also stored in this memory there are two types one is user memory and another is program memory. The memory contains information of identity of a device.
The power is actually supplied by a battery or capacitor but mainly battery is used. The battery is used to supply power for sensor node. There are two types of batteries they are rechargeable and normal battery.
Sensors are hardware devices that can detect change in physical medium. Like temperature and pressure. The sensors detect analog signals and covert them and sent to receiver for further processing.
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