Method of detecting unknown object and apparatus therefor

Details Method of detecting unknown object and apparatus therefor Method of detecting unknown object and apparatus therefor

1988-04-13

1992-01-14

Barron, Jr., Gilberto

Communications: directive radio wave systems and devices (e.g.,

Transmission through media other than air or free space

342181, 342351, 342 55, G01S 1389, G01S 1386, G01S 706

Patent

active

050814567

ABSTRACT:
In visualizing an unknown object possessed by a person to be checked, a narrow pulsating radio wave beam is scanned over the whole surface of the person to observe the intensity of a reflected radio wave at each scan point. The frequency of the radio wave beam is set at a frequency easy to be transmitted by the human body to suppress the reflection from the human body and emphasize the unknown object to thereby discriminate between them. An image of the person to be checked is displayed and the portion having a strong reflection is color-displayed on the image to allow the check of the unknown object possessed by the person without contacting the person.

REFERENCES:
patent: 3500395 (1970-03-01), Foster et al.
patent: 3599211 (1971-08-01), Mardon
patent: 3713156 (1973-01-01), Pothier
patent: 3911435 (1975-10-01), Mardon et al.
patent: 4064458 (1977-12-01), De Loach, Jr.
Reber et al., "Evaluation of Active and Passive Near-Millimeter-Wave Radiometric Imaging Techniques for Detection of Concealed Objects", Mar. '81, The Aerospace Report No. ATR-80(7843)-2, prepared for Sandia Laboratories, Alburquerque, N. Mex.
G. F. Abbott, "Personal Surviellance System", IBM Tech. Disclosure Bulletin, vol. 12, #7, Dec. 1969, pp. 1119-1120.

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