Distant Detection of Concealed Weapons

Luna Innovations is investigating an ultrasonic/acoustic detection system for concealed weapons and explosives for the Department of Justice. Using ultrasonic beams to achieve a focal spot on the target, this device generates acoustics to probe under clothing. Acoustics, derived from nonlinear interactions of two beams with different frequencies, mix and penetrate clothing to hear what is inside. The DOJ project is for a small, portable device at shorter distances. Building on that success, we propose a scaled-up system optimized for relevant distances desired by HSARPA. Significant design issues must be resolved to make this step. This SBIR will determine source parameter designs analyzing parametric vs. crossed-beam generation optimizing the probing frequencies. These findings permit a systems-level design for a long-distance field prototype to detect and classify anomalous concealed elements carried on a human body. The benefits of this approach are that the data are derived from mechanical parameters such as impedance, resonance, and geometry which are hard to hide from a sound beam. This brings an independent view of a suspect. The measurement is non-injurious, potentially light-weight, low-cost and portable. Commercial applications include security, inspection, quality control and medical devices.