Remote detection and measurement of objects
First Claim
1. A system for remote detection of one or more dimensions of a metallic and/or dielectric object, comprising:
- a transmission apparatus, including a directional transmission element, that is, in use, pointed towards a target by a user, the transmission apparatus being configured to direct microwave and/or millimeter wave radiation with a first polarization in a predetermined direction,a non-imaging detection apparatus configured to detect radiation from an entity resulting from the transmitted radiation, the detection apparatus being configured to detect radiation which has the first polarization and to detect radiation which has a second polarization which transverse to the first polarization, the detection apparatus being further configured to generate one or more detection signals in the frequency domain, anda controller, the controller being operable to(i) cause the transmitted radiation to be swept over a predetermined range of frequencies,(ii) perform a transform operation on the detection signal(s)(iii) determine, from one or more features of the transformed signal, one or more dimensions of a metallic or dielectric object upon which the transmitted radiation is incident,wherein step (ii) produces first and second outputs dependent upon the detection signals, wherein the first output is the sum of all correlations between vectors in a first array, the vectors in the first array comprising, for each sweep channel, a stored signal above a threshold, that are derived by Fourier Transform from the detection signals, and wherein the second output is the sum of integrated signals above the threshold for each sweep channel.
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Accused Products
Abstract
Provided are methods of using electromagnetic waves for detecting metal and/or dielectric objects. Methods include directing microwave and/or mm wave radiation in a predetermined direction using a transmission apparatus, including a transmission element; receiving radiation from an entity resulting from the transmitted radiation using a detection apparatus; and generating one or more detection signals in the frequency domain using the detection apparatus. Methods may include operating a controller,'"'"' wherein operating the controller includes causing the transmitted radiation to be swept over a predetermined range of frequencies, performing a transform operation on the detection signal(s) to generate one or more transformed signals in the time domain, and determining, from one or more features of the transformed signal, one or more dimensions of a metallic or dielectric object upon which the transmitted radiation is incident. A system and method for remote detection and/or identification of a metallic threat object using late time response (LTR) signals is also disclosed.
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Citations
18 Claims
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1. A system for remote detection of one or more dimensions of a metallic and/or dielectric object, comprising:
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a transmission apparatus, including a directional transmission element, that is, in use, pointed towards a target by a user, the transmission apparatus being configured to direct microwave and/or millimeter wave radiation with a first polarization in a predetermined direction, a non-imaging detection apparatus configured to detect radiation from an entity resulting from the transmitted radiation, the detection apparatus being configured to detect radiation which has the first polarization and to detect radiation which has a second polarization which transverse to the first polarization, the detection apparatus being further configured to generate one or more detection signals in the frequency domain, and a controller, the controller being operable to (i) cause the transmitted radiation to be swept over a predetermined range of frequencies, (ii) perform a transform operation on the detection signal(s) (iii) determine, from one or more features of the transformed signal, one or more dimensions of a metallic or dielectric object upon which the transmitted radiation is incident, wherein step (ii) produces first and second outputs dependent upon the detection signals, wherein the first output is the sum of all correlations between vectors in a first array, the vectors in the first array comprising, for each sweep channel, a stored signal above a threshold, that are derived by Fourier Transform from the detection signals, and wherein the second output is the sum of integrated signals above the threshold for each sweep channel. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A system for remote identification of the caliber and/or barrel length of a metallic threat object, comprising:
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a transmission apparatus, including a transmission element, configured to direct microwave and/or millimeter radiation in a predetermined direction, a detection apparatus configured to receive radiation from an entity resulting from the transmitted radiation to store its amplitude as a function of frequency, and control circuitry, the control circuitry being operable to (i) cause the transmitted radiation to be swept over a predetermined range of frequencies, (ii) perform a transform operation on the detection signal(s) to generate one or more transformed signals in the time domain, (iii) extract, from one or more features of the transformed signal, the onset of oscillatory response; (iv) identify the barrel length of the metallic threat object from the frequency of onset of the oscillatory response, wherein step (iii) includes the calculation of the correlation of the detection signal with a chirped wave response for particular values of threshold frequency f0 to form a correlation signal. - View Dependent Claims (18)
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Specification