Object distance measuring system

PURPOSE: A distance measuring system of an objects is provided to measure a distance of an moving object by using a pulse Doppler method. CONSTITUTION: A first detector(10) includes a first signal transmitting unit(12), a first Doppler signal receiving unit(14), a first wireless communication module(16) and a distance calculating unit(18) A second detector(20) includes a second signal transmitting unit(22), a second Doppler signal receiving unit(24) and a second wireless communication module(26). The first signal transmitting unit and the second signal transmitting unit transmit measuring signals(A,B) in the first detector and the second detector. The second Doppler signal receiving unit delivers a received Doppler signal(#B) to the second wireless communication module in the second detector. The second wireless communication module converts the Doppler signal into a packet type message(#B_M) and transmits the same. The distance calculating unit determines an object location by using signal rates between signal intensities(SA,SB) of Doppler signals provided in the first Doppler signal receiving unit and the first wireless communication module. [Reference numerals] (12) Signal transmitting unit; (14) Doppler signal receiving unit; (16) Wireless communication module; (18) Distance calculating unit; (22) Signal transmitting unit; (24) Doppler signal receiving unit; (26) Wireless communication module