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NCJRS Abstract

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  NCJ Number: NCJ 178564     Find in a Library
  Title: Handheld Remote Concealed-Weapons Detector: Final Technical Report
  Document URL: PDF 
  Author(s): Franklin Felber ; Norbert Wild ; Dennis Breuner ; Frank Doft ; Scott Nunan
  Corporate Author: Jaycor, Inc
United States of America
  Date Published: 1999
  Page Count: 24
  Annotation: Several working models of a handheld, battery-operated prototype of a remote concealed-weapons detector have been built and tested; this weapons detector will enable police and security personnel to detect metallic and nonmetallic weapons concealed beneath clothing in a person from beyond arm's length to a distance of about 20 feet.
  Abstract: The detector transmits narrow ultrasound pulses and detects the ultrasound glints reflected off hard surfaces beneath clothing. These detectors can be used for hands-off, stand-off frisking of suspects for metallic and nonmetallic weapons. They can also be used to search for metallic and nonmetallic weapons on cooperative persons at courthouse entrances and other monitored security portals. The detector can image weapons and not just detect them, at ranges up to 15 feet, using the same ultrasound frequency of 40 kHz used by commercial rangefinders. The concealed-weapons detector operates in a way similar to that of a rangefinder, but at higher peak fluxes and pulse repetition frequencies. The detector alerts the user to concealed weapons audibly and visibly by detecting ultrasound glints above a body/clothing baseline and by compensating for changing range and attenuation. The detector locates concealed weapons within a 6-inch illuminated spot at 10 feet. The signal processor eliminates any signal from beyond the target. Figures and appended progress report from 1997
  Main Term(s): Police equipment
  Index Term(s): Police safety ; Concealed weapons detection ; Weapon carrying ; NIJ final report
  Sponsoring Agency: US Dept of Justice
National Institute of Justice
Office of Science and Technology
United States of America
  Grant Number: 97-LB-VX-K008
  Sale Source: National Institute of Justice/NCJRS
Box 6000
Rockville, MD 20849
United States of America

NCJRS Photocopy Services
Box 6000
Rockville, MD 20849-6000
United States of America
  Type: Report (Technical)
  Country: United States of America
  Language: English
  Note: Dataset may be archived by the NIJ Data Resources Program at the National Archive of Criminal Justice Data
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