System for detecting underground objects
First Claim
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1. A system for detecting underground objects including:
- means for collecting reflected wave profile data on a plane cutting through soil at right angles with the ground by having a transmitting antenna and a receiving antenna held at a predetermined mutual distance and moved in increments of a predetermined distance on the ground in a direction virtually at right angles with the direction in which the antennas are disposed, said receiving antenna at every increment in the movement receiving the wave reflected by the object of a pulse signal emitted into the soil by said transmitting antenna;
controlling and processing means for subjecting said reflected wave profile data to synthetic aperture processing to produce a detected image output of the targets; and
output display means for displaying said detected image output;
whereinsaid controlling and processing means comprises;
means for suitably varying the dielectric constant to be set therein and performing synthetic aperture processing of said reflected wave profile data for each set value of the dielectric constant;
means for evaluating results of said processing to obtain the actual dielectric constant of the soil in which the targets are buried;
means for performing synthetic aperture processing of said reflected wave profile data using said obtained actual dielectric constant to obtain image data with respect to a time scale; and
means for converting the scale of said image data from time scale to length scale through geological correction using said actual dielectric constant, processing for outputting of the image data with respect to the length scale to obtain a detected image output of the targets, and delivering the same to said output display means.
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Abstract
A system for detecting underground objects which uses reflected wave profile data collected for obtaining a detected image output and subjects the data to a sequence of synthetic aperture processing, in which set values of the dielectric constant are successively varied, and obtains the actual dielectric constant of the soil in which the targets are buried by evaluating the results of the synthetic aperture processing, whereby the need for special data collecting work only for obtaining the actual dielectric constant is eliminated.
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6 Claims
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1. A system for detecting underground objects including:
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means for collecting reflected wave profile data on a plane cutting through soil at right angles with the ground by having a transmitting antenna and a receiving antenna held at a predetermined mutual distance and moved in increments of a predetermined distance on the ground in a direction virtually at right angles with the direction in which the antennas are disposed, said receiving antenna at every increment in the movement receiving the wave reflected by the object of a pulse signal emitted into the soil by said transmitting antenna; controlling and processing means for subjecting said reflected wave profile data to synthetic aperture processing to produce a detected image output of the targets; and output display means for displaying said detected image output;
whereinsaid controlling and processing means comprises; means for suitably varying the dielectric constant to be set therein and performing synthetic aperture processing of said reflected wave profile data for each set value of the dielectric constant; means for evaluating results of said processing to obtain the actual dielectric constant of the soil in which the targets are buried; means for performing synthetic aperture processing of said reflected wave profile data using said obtained actual dielectric constant to obtain image data with respect to a time scale; and means for converting the scale of said image data from time scale to length scale through geological correction using said actual dielectric constant, processing for outputting of the image data with respect to the length scale to obtain a detected image output of the targets, and delivering the same to said output display means. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification