Radar plant and measurement technique for determination of the orientation and the depth of buried objects
First Claim
1. Apparatus for the generation of information indicative of the depth and orientation of an object positioned below the surface of the ground, the apparatus including a transmitter for generating a transmitted signal, an antenna system for emitting the transmitted signal and for receiving a reflected electromagnetic signal reflected by the object, and a receiver for processing the reflected signal received from the antenna system, characterized in that the antenna system has a geometrical center and comprises a plurality of individual antenna elements having a polarization that is at least approximately linear and that are positioned relative to the geometrical center of the antenna system with each of the centers of the antenna elements displaced in relation to the geometrical center of the antenna system, and further characterized in that the apparatus comprises means for rotation of the antenna system and thus the polarization of an electromagnetic field established relative to the geometric center of the antenna system.
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Accused Products
Abstract
A plant for generation of information indicative of the depth and the orientation of an object positioned below the surface of the ground is adapted to use electromagnetic radiation emitted from and received by an antenna system associated with the plant. The plant has a transmitter and a receiver for generation of the electromagnetic radiation in cooperation with the antenna system mentioned and for reception of the electromagnetic radiation reflected by the object in cooperation with the antenna system, respectively. The antenna system includes a plurality of individual antenna elements such as dipole antennas, having substantially linear polarization. The antenna elements are positioned in relation to the geometric center of the antenna system, with the various centers of the antenna element displaced in relation to the geometric center of the antenna system. The plant has a mechanism for rotating the antenna system and thus polarizing the electromagnetic field around or in relation to the geometric center of the antenna system.
97 Citations
42 Claims
- 1. Apparatus for the generation of information indicative of the depth and orientation of an object positioned below the surface of the ground, the apparatus including a transmitter for generating a transmitted signal, an antenna system for emitting the transmitted signal and for receiving a reflected electromagnetic signal reflected by the object, and a receiver for processing the reflected signal received from the antenna system, characterized in that the antenna system has a geometrical center and comprises a plurality of individual antenna elements having a polarization that is at least approximately linear and that are positioned relative to the geometrical center of the antenna system with each of the centers of the antenna elements displaced in relation to the geometrical center of the antenna system, and further characterized in that the apparatus comprises means for rotation of the antenna system and thus the polarization of an electromagnetic field established relative to the geometric center of the antenna system.
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22. A method for generation of information indicative of the depth and the orientation of an object positioned below the surface of the ground, wherein the method includes the emission from an antenna system of a transmitted signal generated by a transmitter, the reception of a reflected signal from the object by the antenna system, and the processing of the reflected signal received from the antenna system by a receiver, wherein the method is characterized by the steps of:
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using, for the emission and reception, respectively, of the transmitted signal and the reflected signal, a plurality of individual antenna elements having a polarization that is at least approximately linear in relation to the geometrical center of the antenna system, with each of the centers of the antenna elements displaced in relation to the geometrical center of the antenna system; and
rotating the antenna system in relation to the geometric center of the antenna system. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42)
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Specification