System and method to detect anomalies
First Claim
1. A system for detecting anomalies concealed upon a person, the system comprising:
- a detection probe having an electromagnetic transmitter and an electromagnetic receiver, the electromagnetic transmitter is configured to emit electromagnetic pulses, the electromagnetic receiver is configured to sample electromagnetic pulses from the electromagnetic receiver at specified times within a waveform window;
an objective optic incorporated in the detection probe, the objective optic configured to direct the pulsed electromagnetic radiation emitted by the transmitter to a concealment stack and;
the objective optic being configured to receive and direct to the receiver reflections of the concealment stack at a defined distance, wherein the detection probe may be focused at a depth of concealed skin of the person without the exterior of the detection probe contacting a top of the concealment stack;
the transmitter and receiver configured in a monostatic reflection geometry with respect to an objective optic; and
a time domain data acquisition system in communication with the receiver, the time domain data acquisition system configured to capture reflections from a range thickness of the concealment stack and generate a returned waveform, the waveform window having the reflection time corresponding to the focus of the objective opticwherein the time domain data acquisition system is configured to determine by analyzing the returned waveform that the one or more intereferent components of the concealment stack is smaller in either volume, density, or mass than a quantitative threshold to be considered an anomaly;
wherein the quantitative threshold is based on thickness, lateral extent, volume, density, or mass to be considered an anomaly;
an indicator indicating when an operator of the detection probe is at an appropriate distance from the concealment stack to obtain a valid measurement, wherein the appropriate distance is 100 mm or less.
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Accused Products
Abstract
A system and method for detecting anomalies concealed upon a person may include a detection probe having an electromagnetic transmitter and an electromagnetic receiver. The electromagnetic transmitter is configured to emit electromagnetic pulses, while the electromagnetic receiver is configured to sample electromagnetic pulses from the electromagnetic receiver at specified times within a waveform window. The electromagnetic pulses may span the terahertz spectral region of 0.04 to 4 THz. The system may also have optical fibers connected to the electromagnetic transmitter and electromagnetic receiver, wherein femtosecond laser pulses are directed from a source to the electromagnetic transmitter and the electromagnetic receiver by the optical fibers.
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Citations
22 Claims
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1. A system for detecting anomalies concealed upon a person, the system comprising:
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a detection probe having an electromagnetic transmitter and an electromagnetic receiver, the electromagnetic transmitter is configured to emit electromagnetic pulses, the electromagnetic receiver is configured to sample electromagnetic pulses from the electromagnetic receiver at specified times within a waveform window; an objective optic incorporated in the detection probe, the objective optic configured to direct the pulsed electromagnetic radiation emitted by the transmitter to a concealment stack and; the objective optic being configured to receive and direct to the receiver reflections of the concealment stack at a defined distance, wherein the detection probe may be focused at a depth of concealed skin of the person without the exterior of the detection probe contacting a top of the concealment stack; the transmitter and receiver configured in a monostatic reflection geometry with respect to an objective optic; and a time domain data acquisition system in communication with the receiver, the time domain data acquisition system configured to capture reflections from a range thickness of the concealment stack and generate a returned waveform, the waveform window having the reflection time corresponding to the focus of the objective optic wherein the time domain data acquisition system is configured to determine by analyzing the returned waveform that the one or more intereferent components of the concealment stack is smaller in either volume, density, or mass than a quantitative threshold to be considered an anomaly; wherein the quantitative threshold is based on thickness, lateral extent, volume, density, or mass to be considered an anomaly; an indicator indicating when an operator of the detection probe is at an appropriate distance from the concealment stack to obtain a valid measurement, wherein the appropriate distance is 100 mm or less. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method using a dynamically positioned detection probe for evaluating a time domain reflected waveform for criteria corresponding to features which indicate an anomaly in a region of a concealment stack on a person, the method comprising the steps of:
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indicator indicating when an operator of the detection probe is at an appropriate distance from the concealment stack to obtain a valid measurement, wherein the appropriate distance is 100 mm or less; illuminating a concealment stack with an electromagnetic pulse emitted by a transmitter and directed from the transmitter to the concealment stack by an objective optic, wherein the transmitter and objective optic are located within the detection probe; directing reflections of the concealment stack to a receiver by the objective optic, the receiver being located within the dynamically positioned probed; collecting the waveform by the receiver in the probe; parsing the waveform into a candidate group of positive or negative going peaks corresponding to reflection interfaces within the concealment stack; determining if an anomaly is present if one or more peaks within the candidate group quantitatively correspond to one or more thresholds computed from the amplitudes and/or one or more differences in time between one or more peaks in the candidate group determining by analyzing the waveform that the one or more intereferent components of the concealment stack is smaller in either volume, density, or mass than a quantitative threshold to be considered an anomaly; and wherein the quantitative threshold is based on thickness, lateral extent, volume, density, or mass to be considered an anomaly. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22)
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Specification