Dr. Melvin C. Maki Profile

Dr. Melvin C. Maki

Director/R&D

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Publications (2)

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Proceedings Article | 29 January 1997 Paper

Perimitrax: the next generation in guided radar perimeter security technology

Melvin Maki, Charles Hill

Proceedings Volume 2934, (1997) https://doi.org/10.1117/12.265413

KEYWORDS: Sensors, Radar, Control systems, Signal processing, Network security, Transceivers, Security technologies, Detection and tracking algorithms, Manufacturing, Environmental sensing

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The first application of 'leaky' or 'ported' coaxial cables to radar system for covert detection of human intruders for outdoor perimeter security was in the early 1970's. Early systems were relatively rudimentary using large central processors and difficult to manufacture sensing cables. However, since that time these systems have evolved in both design and performance and been proven to have both high detection performance and low false and nuisance response in such diverse, all-weather perimeter applications as military bases, corrections, and industrial sites. This paper introduces the latest generation of guided radar security technology now being fielded. This generation features more flexible and modular 'plug and play' electronics, matched to both large and small installations from the sensor zone end, up to the control and display. Advanced signal processing is now included which is tuned to discriminate the unique features of the intruder from those of the environment. Such processing capitalize on the ability to look at and classify features of larger perimeters. New 'TR' technology sensor cables have ben developed which are manufactured in a single pass approach to provide more uniformity of sensor performance. These sensor include both a siamese design for single slot burial, and also a small diameter dual cable for wider zone requirements. This paper will outline the major elements of guided radar sensors and overview the new components and architecture of this latest generation. It will discuss the results of early operational performance testing, and the new benefits for diverse applications from government, to corrections and airports.

Proceedings Article | 30 May 1995 Paper

Application of covert illumination to intrusion surveillance, assessment, and detection

Melvin Maki, Stefan Scherbarth

Proceedings Volume 2497, (1995) https://doi.org/10.1117/12.210493

KEYWORDS: Cameras, Fiber optic illuminators, Light emitting diodes, Infrared cameras, Surveillance, Light sources and illumination, Visible radiation, Sensors, Video surveillance, Video

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Covert illumination is an important element in providing surveillance, detection, and assessment for security applications. IR illumination is increasingly providing this function; however, conventional filament-based illuminators have limited performance and life. A new variety of light emitting diode (LED) illuminators is described that provides long life at low power. A further advance is to use a planar array of LED's with lenses to optimize the uniformity of scene illumination and maximize the illumination range. Modern CCD cameras have an inherently high IR sensitivity so are well matched to work with this illumination. Further enhancements are to integrate the combination of low-light camera and LED illuminator in a discrete column type package to make the overall illumination and assessment system unobtrusive. Finally, these components can be further combined with automated assessment aids to turn the surveillance device into a true detection sensor that can operate stand-alone without active personnel monitoring. A review of the major IR design considerations is included, along with several examples of systems to illustrate potential applications.

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