POSITION TRACKING APPARATUS OF MULTIPLE MOVING OBJECTS IN A WIRELESS SENSOR NETWORK THROUGH A DATA AND PROCESS DISTRIBUTION METHOD USING A MULTIPLE SENSOR NODE AND A METHOD THEREOF

摘要

PURPOSE: A position tracking apparatus of multiple moving objects in a wireless sensor network and a method thereof are provided to exactly grasp the position of a source even when a noise including a Doppler effect and a Rayleigh multipath fading is included in a receiving signal.;CONSTITUTION: A frequency divider(122) receives an acoustic signal generated from moving objects from multiple sensor nodes(10), divides a frequency band, and extracts a main frequency component. A relative distance data calculator(124) calculates the energy intensity of an acoustic signal which each sensor node senses from each moving object according to an extracted main frequency component. The relative distance data calculator calculates relative distance data indicating a distance relation between each sensor node and each moving object by comparing the class of an acoustic signal energy intensity in each sensor node. A position tracking part(126,128) tracks the position of objects by using relative distance information.;COPYRIGHT KIPO 2013;[Reference numerals] (100) Sampling and time divider; (102) DFT unit; (104) Filtering unit; (106) Signal coding unit; (120) Signal decoding unit; (122) Frequency divider; (124) Relative distance data calculator; (126) Frequency component position tracking unit; (128) Moving object tracking unit