DISTANCE MEASURING METHOD OF A FREQUENCY-MODULATED CONTINUOUS-WAVE RADAR AND AN APPARATUS THEREOF

摘要

PURPOSE: A distance measuring method of an FMCW(Frequency-Modulated Continuous-Wave) radar and an apparatus thereof are provided to easily improve precision in measuring the distance of a single paused target object and to reduce the load of system performance.;CONSTITUTION: A distance measuring method of an FMCW radar includes following steps. The FMCW radar wave having fixed cycle(T0) and bandwidth(B0) is transmitted to a target object. A target reference distance(R0) is calculated using a first beat frequency extracted from a reflected waveform. Based on the target reference distance, a bandwidth unit variation and a time unit variation are calculated. After multiplying the bandwidth unit variation or the time unit variation n times, changed cycle and bandwidth are retransmitted to the target object. A second beat frequency is extracted using the FMCW radar wave which is received after being reflected from the target object. In case the second beat frequency and the first beat frequency are different, a precise distance to the target object is calculated using the second beat frequency.;COPYRIGHT KIPO 2013;[Reference numerals] (S100) General detection section; (S110) Transmit in a cycle T0 and a bandwidth B0; (S120) Receive a bit signal; (S140) Detect a bit frequency f_b0; (S150) Calculate a distance value; (S200) Precise detection section; (S210) Calculate ΔB for n times higher precise detection; (S230) Transmit in the cycle T0 and a bandwidth B0 + ΔB·n; (S250) Detect the bit frequency; (S270) Calculate an n times precise distance value