PERIMETRIC WIRELESS SENSOR NETWORK BASED

Abstract

Wireless sensor networks are a relatively new and active computer science and telecommunications research area. A wireless sensor network (WSN) is a wireless, collaborative network of spatially distributed autonomous sensorial nodes capable of monitoring of a certain physical or environmental attribute, such as temperature, sound, vibration, thermal emissions, motion etc. These sensor nodes collect and forward their data to the end user through a gateway node which is responsible for this sole purpose to act as the bridge between the senor network and the base station. Each sensor node in a WSN is a miniature intelligent device, equipped with one or more sensor(s) to monitor any specific physical attribute(s) of the surroundings in its deployed area. Energy is the scarcest resource of WSN nodes, and it determines the lifetime of WSNs. WSNs is meant to be deployed in large numbers in various environments, including remote and hostile regions, with adhoc communications as key. Specific applications of WSN include habitat monitoring, object tracking, fire detection, and traffic monitoring. In a typical application, a WSN is scattered in a region where it is meant to collect data through its sensor nodes. We have designed a security surveillance system which uses special sensor nodes capable of detecting human presence within their area of coverage and report it to the base station at a remote location (possibly, hundreds of feet/meters away from the actual surveillance area) and also to track the movement direction of the detected human within the network. The network can be monitored on a PC, acting as a base station, with our own custom developed GUI enabling users to monitor and control the entire WSN and also identify where detection has been physically ade along with the movement direction of the intruder and appropriate action can then be taken to suppress the threat reported by the surveillance network created.