METHOD AND APPARATUS FOR ALTITUDE MEASUREMENT IN PORTABLE TERMINAL

摘要

The present invention relates to an altitude measuring method and device of a mobile terminal, capable of improving the measurement accuracy of an altitude when the altitude is measured using a barometer. The altitude measuring method includes a step of receiving a reference altitude from an information providing system installed at a specific spot; a step of measuring the current atmospheric pressure of the specific spot; a step of calculating the altitude of the specific spot by using the measured current atmospheric pressure and reference atmospheric pressure; and a step of storing the difference between the reference altitude and the calculated altitude of the specific spot as an altitude error. The present invention provides accurate altitude. [Reference numerals] (301) Request for measuring an altitude;(302) Reference altitude is received?;(303) Measure current atmospheric pressure;(305) Calculate a current altitude using the measured atmospheric pressure;(307) Calculate an altitude error by comparing the received reference altitude with the calculated current altitude and store the error;(309) Set the received reference altitude as the current altitude;(311) Measure the atmospheric pressure at a current position;(313) Calculate the altitude of the current position using the measured atmospheric pressure;(315) Is the altitude error valid?;(317) Set the sum of the calculated altitude of the current position and the altitude error as the current altitude;(319) Set the calculated altitude of the current position as the current altitude;(AA) START;(BB) END