Method and apparatus for measuring the distance by using radio frequency signal
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A distance measuring method and a device using an RF(Radio Frequency) signal are provided to measure the real distance exactly by comparing distance data obtained in advance and a measured distance value and to judge whether an obstacle exists within the distance to be measured, by changing the transmitter power of the RF signal. A distance measuring method using an RF signal is composed of steps for setting the transmitter power of the RF signal of a signal generation module at minimum in order to measure the farthest distance if an obstacle does not exist within a measurement region(S210); measuring the distance between the signal generation module and a fixing module by using a signal set at minimum(S220); determining that the obstacle does not exist between the signal generation module and the fixing module if measurement of the distance is available(S240); and judging the distance according to the existence of the obstacle.