KEYWORDS: Receivers, Global Positioning System, Electronics, Interfaces, Sensors, Digital signal processing, Fourier transforms, Signal processing, Error analysis, Video
This paper presents issues related to effects generated in avionic electronics by terrestrial neutron environments and methods for mitigating the effects through part selection, circuit design and system architecture design. The paper includes an explanation of the System Hardening Upset Recovery (SHUR) technology macro cell library and demonstrates how the available functions can be applied to implement robust system operation in the presence of neutron-induced component upsets and package latchup. Recent data on electronic parts and reactor tests performed on components is presented to demonstrate the susceptibility of electronics and components to terrestrial neutrons.
A system has been developed for delivering and attaching a sensor payload to a target using a standard 40-mm grenade launcher. The projectile incorporates an attachment mechanism, a shock mitigation system, a power source, and a video-bandwidth transmitter. Impact and launch g-loads have been limited to less than 10,000 g's, enabling sensor payloads to be assembled using Commercial Off-The-Shelf components. The GLIMPS projectile is intended to be a general-purpose delivery system for a variety of sensor payloads under the Unattended Ground Sensors program. Test results and development issues are presented.
KEYWORDS: Sensors, Antennas, Signal processing, Standards development, Computing systems, Receivers, Signal detection, Data communications, Commercial off the shelf technology, Network security
Recent advances in electronic miniaturization have facilitated the design and development of a deployable, stand-alone sensor for battlefield RF (radio frequency) MASINT (measurement and signature intelligence). Recent results of a Phase I effort to assess battlefield RF signatures and compare sensor sensitivity, size, and number for optimal coverage will be presented. An RF sensor suite is being designed that will be networked for robust and redundant data gathering and wireless, stand-alone operation. The RF sensor will essentially function as a swept-frequency spectrum analyzer, measuring frequency content, amplitude and modulation characteristics over predetermined (or user programmable) bandwidths of interest. Recommendations and preliminary schematics for a compact, ruggedized, low-power RF sensor will be presented together with a design for a low-power centralized wireless network for data transfer and processing. The RF sensor technology developed in this effort will have a predominantly military application but should also find use in security and surveillance applications.
A system has been developed for delivering and attaching a sensor payload to a target using a standard 40-mm grenade launcher. The GLIMPS projectile is intended to be a general purpose delivery system for a variety of sensor payloads including visual, acoustic, and chemical sensors. The GLIMPS projectile flight characteristics are similar to existing 40-mm rounds, with a useful range of up to 300 m. The projectile incorporates an attachment mechanism, a shock mitigation system, a power source, and a telemetry system for transmission of sensor data at up to 1/4 mile range. A second design is also being considered. It is a small taggant projectile that uses an adhesive to attach a tracking transmitter or other small payload to a vehicle at up to 50 m range. While initially developed as a military system, both projectiles can be used to enhance law enforcement operations.
A system has been developed for delivering and attaching a sensor payload to a target using a standard 40-mm grenade launcher. The projectile flight characteristics are similar to existing 40-mm rounds, with a useful range of up to 300 m. The projectile incorporates an attachment mechanism, a shock mitigation system, a power source, and a transmitter that allows sensor data to be transmitted to a receiver at up to 1/4 mile range. Impact g-loads have been limited to less than 10,000 g's, enabling sensor payloads to be assembled using Commercial Off-The-Shelf (COTS) components. The GLIMPS projectile is intended to be a general purpose delivery system for a variety of sensor payloads under the Unattended Ground Sensors program. The Phase I proof-of- concept design was demonstrated using a low-power CMOS camera. Demonstration results and Phase II progress are presented.
A system has been developed for delivering and attaching a sensor payload to a target using a standard 40-mm grenade launcher. The projectile flight characteristics are similar to existing 40-mm rounds, with a useful range of up to 300 m. The projectile incorporates an attachment mechanism, a shock mitigation system, a power source, and a transmitter that allows sensor data to be transmitted to a receiver at up to 1/4 mile range. Impact g-loads have been limited to less than 10,000 g's, enabling sensor payloads to be assembled using Commercial Off-The-Shelf components. The GLIMPS projectile is intended to be a general purpose delivery system for a variety of sensor payloads under the Unattended Ground Sensors program, with Phase I proof-of- concept being demonstrated using a low-power CMOS camera.
A nonlethal method is being developed to extend the range for effectively electrically stunning a person. Present technology, consisting of stun guns and tasers, is limited to distances of < 2 or 3 m. This new concept involves firing a blunt projectile at an individual, which will stick to his clothing with a glue-like substance or with short clothing attachment barbs. The projectile contains a battery pack and associated electronics that will impart a short burst of high-voltage pulses. Pulse amplitudes are near 50 kV with pulse widths of a few micro-seconds and a repetition rate between 10 and 15 pulses per second. The pulse characteristics are similar to well-established electrical shock devices. The pulses will not be lethal, but will disable or cause enough discomfort to the individual to distract him. A compressed gas-charged launch system has been fabricated and tested, and projectile designs compatible with conventional nonlethal weapon launchers are being developed. The projectile is accurate at 10 m and limited tests indicate that it is accurate out to 30 m as well. The presentation will discuss electric shock voltage characterization, projectile configuration, and limited prototype field demonstration test data recorded on instrumented targets.
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