HANDHELD MULTISENSOR CONTRABAND DETECTOR TO IMPROVE INSPECTION OF PERSONNEL AT CHECKPOINTS

摘要

A handheld apparatus for measuring natural microwave electromagnetic radiation emanating from a human body to detect areas of anomalous emissions indicating concealed contraband is disclosed. In a particular embodiment the apparatus includes at least two radiometers directed toward a common viewing plane. Circuitry converts the strength of the microwave emissions into a spatially indexed electrical signal related to the localized intensity of the emanations. The lack of need for highly precise spatial resolution allows the use of a region of the microwave spectrum with an abundance of low cost components. A processing system is configured to analyze the time dependent signal from each radiometer during the scanning of a subject. Additional confirmation sensors that measure the body's acoustical reflection capability and metal content supplement the microwave measurements to provide more robust readings. Methods for determination of the relative position of the anomalous reading and communicating with the operator are discussed.

主权项

1. A handheld multisensory contraband detector comprising.
a plurality of K or Ka band Total Power Radiometers, where each Total Power Radiometer measures the power of natural microwave emissions from different spatial locations of a subject, an Active Ultrasonic Module, where the Active Ultrasonic Module comprises an ultrasonic transmitter, an ultrasonic sensor, and a phased array processer, where the phased array processor provides the position of ultrasonic return signals obtained by the ultrasonic sensor, a Metal Detection Module, a processor board, wherein the processor board processes signals from the Total Power Radiometers, phased array processor, and metal detector, where the processor board calculates a confidence factor of whether or not an anomaly on a subject has been encountered, and an enclosure package, where the enclosure package provides environmental protection to the detectors, sensors, and processors of the handheld multisensory contraband detector.