Download or read book Handheld Concealed Weapons Detector Development written by and published by . This book was released on 2003 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt: This effort entailed the development of an enhanced, hand held, low-cost (less than $1,000 production cost), ultra-sound based Concealed Weapons Detector (CWD), which included the building of a working model for further test and evaluation. Development of inexpensive technology to enable reliable detection of metallic and non-metallic concealed weapons at a standoff distance of up to 10 meters is of great value to law enforcement and security personnel. It was designed for low power operation. The sensor utilizes focused ultrasound (40-kHz frequency) to remotely detect concealed objects from beyond arm's length out to a range of about 25 feet (8 meters). The detector emits an adjustable, audible alarm (with provision for an earphone jack) as well as a visible 5-level LED indicator when an object has been detected. A switchable aiming light allows the user to accurately determine the location of the concealed object. The system was tested on a variety of weapons and clothing types to determine the effectiveness of acoustic phenomenology for detecting weapons concealed beneath a person's clothing. The contractor delivered 20 handheld devices to AFRL for operational effectiveness.

Download or read book Hand held Metal Detectors for Use in Concealed Weapon and Contraband Detection written by Nicholas G. Paulter (Jr.) and published by . This book was released on 2000 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Hand held Metal Detectors for Use in Concealed Weapon and Contraband Detection written by U.S. Department of Justice and published by CreateSpace. This book was released on 2014-08-01 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Office of Law Enforcement Standards (OLES) of the National Institute of Standards and Technology (NIST) provides technical support to the National Institute of Justice (NIJ) program to support law enforcement and criminal justice in the United States. OLES's function is to develop standards and conduct research that will assist law enforcement and criminal justice agencies.

Download or read book Hand held metal detectors for use in concealed weapon and contraband detection written by Nicholas G. Paulter (Jr.) and published by . This book was released on 2003 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Guide to the Technologies of Concealed Weapon and Contratband Imaging and Detection written by Nicholas G. Paulter (Jr.) and published by . This book was released on 2001 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Hand Held Metal Detectors for Use in Concealed Weapon and Contraband Detection written by United States Department of Justice and published by CreateSpace. This book was released on 2014-10-17 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Office of Law Enforcement Standards (OLES) of the National Institute of Standards and Technology (NIST) provides technical support to the National Institute of Justice (NIJ) program to support law enforcement and criminal justice in the United States. OLES's function is to develop standards and conduct research that will assist law enforcement and criminal justice agencies.

Download or read book NIJ Research Portfolio written by and published by . This book was released on 2000 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Detection of Concealed Weapons Using Acoustic Waves written by George Abraham Vadakkel and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Existing weapon detection systems such as metal detectors and X-ray baggage scanners have many drawbacks. While metal detectors can only detect metallic objects, X-ray scanners are unsafe for use on passengers. Also, these systems can only scan people within a short range. These limitations of detecting potentially harmful objects have led to tragic events such as the 9/11 attack on the world trade centre and the 2008 terrorist attack in Mumbai. Development of more advanced security systems would help in curbing such terrorist attacks. These systems could also be used to help security officials in tackling knife and gun related crimes in the streets. The aim of this research is to develop a concealed weapon detection system using acoustic waves. Ideally, the system would have large standoff distance, should be cost-effective and easy to manufacture and would be able to detect both metal and non-metallic weapons. Different techniques such as acoustic signature, resonance acoustic spectroscopy and acoustic imaging were analysed. Acoustic signature techniques identify the target by comparing the acoustic waves reflected by the target to a database of previously recorded acoustic reflections. Resonance acoustic spectroscopy was used on the data acquired using both experimental measurements and Finite Element simulations. A series of resonant frequencies from the acoustic waves reflected by the concealed target were extracted using this technique. This series of resonant frequencies that are unique to the target were used to identify the target. Acoustic camera was used to experimentally record the acoustic reflection from different targets. This was then used to develop images of concealed targets. These tests were performed using commercially available array speaker systems. The probability of improving these results using a better designed ultrasonic or acoustic array speaker system was analysed. This was done by changing different array design parameters and obtaining a highly focused acoustic beam. The results from the experimental tests and Finite Element simulations proved the possibility of using acoustic waves for concealed weapon detection. In the acoustic signature measurements, the frequency spectra of the reflected acoustic waves were shown to be different for different targets. The results from resonance acoustic spectroscopy showed structural resonant frequencies in the frequency spectra that corresponded to the natural frequency of the target. Using acoustic camera kit the image of the concealed target was identified. The array results showed the formation of focused beams for different array configurations. The results showed the formation of grating lobes and side lobes when the inter-element gap became larger than the wavelength of sound waves at the excitation frequency. Finally, a program using neural network was developed to demonstrate how the natural frequencies from the target could be used to identify them. This research work provides a proof of concept of different acoustic wave-based detection and imaging techniques. It has shown the possibility of detecting concealed targets at standoff distances. Using parametric arrays highly focused acoustic or ultrasonic beams could be generated which could be focused on a person suspected of carrying a weapon in a crowded environment. The sound waves reflected back could be analysed using the resonance acoustic spectroscopic technique or one could use the acoustic camera to generate images of targets in real-time. The use of acoustic waves would also help in keeping the cost and complexity of the equipment to a minimum. It also ensures that the public is not exposed to any harmful radiation. The techniques described in this thesis would significantly support the development of a commercially viable, robust acoustic waves based concealed weapon detection system.

Download or read book Open Area Concealed Weapon Detection CWD Sensor System Development written by Yuxiang Huang and published by . This book was released on 2021 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book NILECJ Standard for Hand held Metal Detectors for Use in Weapons Detection written by National Institute of Law Enforcement and Criminal Justice and published by . This book was released on 1975 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Hand held Metal Detectors for Use in Concealed Weapon and Contraband Detection written by Nicholas G. Paulter and published by . This book was released on 2000 with total page 55 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Low Frequency Magnetic Imaging Detector for Concealed Weapons Detection written by and published by . This book was released on 1999 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Military personnel, law-enforcement officers, and civilians face every-increasing dangers from persons carrying concealed handguns and other weapons. In direct correspondence with this danger is a need for more sophisticated means of detecting concealed weapons. We have developed a novel concealed-weapons detector based on the principle of low-frequency magnetic imaging. The detector is configured as a portal, and constructs an image of electrically conductive objectives transported through it with a potential spatial resolution of approximately 1 inch. Measurements on a breadboard version of the weapons detector have, to date, yielded a resolution of 2 inches. The detector is sensitive to all metals, semiconductors, and conductive composites. The measured conductivity image formed by the detector is combined with the video signal fro a visible CCD camera to form a composite image of persons transiting the detector portal and the conductive objects they are carrying. Accompanying image recognition software could be used to determine the threat level of objects based upon shape, conductivity, and placement on the person of the carrier, and provide cueing, logging, or alarm functions to the operator if suspect weapons are identified. The low-power, low frequency emissions from the detector are at levels considered safe to humans and medical implants.

Download or read book Non Linear Acoustic Concealed Weapons Detector written by and published by . This book was released on 2006 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt: The major findings of this effort clearly demonstrate that Non-linear Acoustics is a low cost alternative to conventional imaging methods for concealed weapons detection. Our approach is to use ultrasonics to create a localized zone where non-linear interactions generate a lower frequency acoustic wave that is steerable and is able to penetrate clothing better than direct ultrasonics. We have been able to detect guns of various sizes, box cutters, knives and distinguish weapons from non-weapons including plastic devices. Sophisticated software generated signals with customized transducer/receiver design have been able to provide characteristic information about a hidden weapon 15 feet away and classify the weapon based on a database approach. Most recently improved software allows user- friendly display of results with images. We are confident of the readiness of our work for prototype development. In addition to being able to detect the weapons mentioned above, we have also been highly successful in imaging improvised weapons (received from the DOJ/AFRL lab) from a near range distance.

Download or read book Future concealed weapon detection written by R.M.E.M. van Heijster and published by . This book was released on 2011 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Walk Through Metal Detectors for Use in Concealed Weapon and Contraband Detection written by U.s. Department of Justice and published by CreateSpace. This book was released on 2014-10-17 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Office of Law Enforcement Standards (OLES) of the National Institute of Standards and Technology (NIST) provides technical support to the National Institute of Justice (NIJ) program to support law enforcement and criminal justice in the United States. OLES's function is to develop standards and conduct research that will assist law enforcement and criminal justice agencies.

Download or read book Hand Held Metal Detectors for Use in Concealed Weapon and Contraband Detection written by Nicholas G. Paulter, Jr. and published by . This book was released on 2001-12 with total page 55 pages. Available in PDF, EPUB and Kindle. Book excerpt: This document is an equipment standard developed by the Office of Law Enforcement Standards of the Nat. Institute of Standards & Technology (NIST). It is produced as part of the Law Enforcement & Corrections Standards & Testing Program of the Nat. Institute of Justice (NIJ). Because this NIJ standard is designed as a procurement aid, it is necessarily highly technical. Chapters: commonly used symbols & abbreviations; introduction: purpose of the Standard, & definitions; requirements for acceptance; performance testing procedures; field testing procedures; test objects description; report sheets; references; & five figures.

Download or read book Introduction to Policing written by Steven M. Cox and published by SAGE Publications. This book was released on 2015-12-31 with total page 877 pages. Available in PDF, EPUB and Kindle. Book excerpt: Introduction to Policing, Third Edition continues to focus on the thought-provoking, contemporary issues that underscore the challenging and rewarding world of policing. Steven M. Cox, Susan Marchionna, and experienced law enforcement officer Brian D. Fitch balance theory, research, and practice to give students a comprehensive, yet concise, overview of both the foundations of policing and the expanded role of today’s police officers. The accessible and engaging writing style, combined with stories from the field, make policing concepts and practices easy for students to understand and analyze. Unique coverage of policing in multicultural communities, the impact of technology on policing, and extensive coverage of policing strategies and procedures — such as those that detail the use of force —make this bestselling book a must-have for policing courses.