DETECTION SYSTEM FOR UNDERGROUND BURIED BODY

摘要

PURPOSE:To eliminate a ground surface reflected wave completely by calculating the sum of and difference between two reflected waves as vector quantities. CONSTITUTION:A CW radio wave from a transmitter 2 is transmitted from an antenna 11, reflected by the ground surface 5, and received by antennas 12 and 13. Those received waves are supplied to an adding and subtracting circuit 7 functioning as an adding circuit for vectors and the sum signal (a) and difference signal (b) of those reflected waves are sent to a receiver 3. The receiver 3 includes a detector and amplifier 33 and a signal processor 3 to perform processing corresponding to the sum signal (a) and difference signal (b), and the difference signal (b) due to a buried body 6 has a high voltage to output a 1kHz monitor tone, detecting the body.