Remote detection and measurement of objects
First Claim
1. A system for remote detection and/or identification of a metallic threat object, comprising:
- a transmission apparatus, including a transmission element, configured to direct microwave and/or mm wave radiation in a predetermined direction,a detection apparatus configured to receive radiation from an entity resulting from the transmitted radiation and to generate one or more detection signals in the frequency domain, andcontrol 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, a late time response (LTR) signal of the metallic threat object upon which the transmitted radiation is incident, the metallic threat object being carried by or associated with the entity; and
(iv) from the LTR signal, determine the presence and/or identity of the metallic threat object.
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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
53 Claims
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1. A system for remote detection and/or identification of a metallic threat object, comprising:
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a transmission apparatus, including a transmission element, configured to direct microwave and/or mm wave radiation in a predetermined direction, a detection apparatus configured to receive radiation from an entity resulting from the transmitted radiation and to generate one or more detection signals in the frequency domain, 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, a late time response (LTR) signal of the metallic threat object upon which the transmitted radiation is incident, the metallic threat object being carried by or associated with the entity; and (iv) from the LTR signal, determine the presence and/or identity of the metallic threat object. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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31. A method that uses control circuitry for remote detection and/or identification of a metallic threat object,
the method comprising (i) causing transmitted radiation to be swept over a predetermined range of frequencies, wherein the transmitted radiation corresponds to microwave and/or mm wave radiation that is directed in a predetermined direction by a transmission apparatus including a transmission element; -
(ii) performing a transform operation on detection signal(s) to generate one or more transformed signals in the time domain, wherein the detection signal(s) correspond to one or more detection signals generated in the frequency domain by a detection apparatus that is configured to receive radiation from an entity resulting from the transmitted radiation; (iii) extracting, from one or more features of the transformed signal, a late time response (LTR) signal of the metallic threat object upon which the transmitted radiation is incident, the metallic threat object being carried by or associated with the entity; and (iv) from the LTR signal, determining the presence and/or identity of the metallic threat object. - View Dependent Claims (32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53)
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Specification