영상 정보를 이용한 광신호 기반의 마이크로 센서 노드 위치 인식 기법

Abstract

Sensor node localization is an essential process before communication in randomly distributed optical wireless sensor network. In this paper, we analyzed problems which can be occurred in optical wireless sensor node localization method using a time of flight. And to overcome the problems this paper suggests a new scheme based on optical signal using image information. The base station of sensor node localization scheme consists of a laser and camera. Principle of this scheme is that laser beam, reflected from sensor node reflector, comes back into camera of the base station and then sensor node is localized by using geometric configuration of the base station and pixel location of the laser beam on image. Experiment on micro sensor node localization is performed. As a result of experiment, it is confirmed that this scheme can be applicable to wireless optical sensor network.