METHOD AND SYSTEM FOR INPUTTING INFORMATION USING ULTRASONIC SIGNAL

摘要

PURPOSE: A method and a system for inputting information using ultrasonic signal are provided to reliably trace a location of a signal generation device which moves a wide area without increasing the size of the signal generation device, thereby inputting location information. CONSTITUTION: A signal generation device generates a ultrasonic signal. A plurality of ultrasonic receivers(240) is separately installed and receives a ultrasonic signal. A location measurer(230) uses ultrasonic receiving information inputted form the initial signal receivers which is one part of the ultrasonic signal receivers according to a area which the signal generation device is located. The location measurer distinguishes an area located in the signal generation device based on the ultrasonic receiving information and uses ultrasonic receiving information inputted form a ultrasonic signal receiver corresponding to the area to measure the location of the signal generation device.