Defense

Synthetic Aperture Sonar Can Help Navy Hunt Sea Mines

Since World War II, sea mines have damaged or sunk four times more U.S. Navy ships than all other means of attack combined, according to a Navy report on mine warfare. New sonar research being performed by the Georgia Tech Research Institute (GTRI) could improve the Navy’s ability to find sea mines deep under water.

Posted in: News, Defense, Imaging, Automation, Robotics, Detectors, Sensors
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Computer Program Analyzes Intelligence Data

Every day U.S. military and security units receive vast amounts of data collected by intelligence, surveillance and reconnaissance (ISR) sensors. Human analysts constantly review this data, searching for possible threats. To aid this effort, researchers from the Georgia Tech Research Institute (GTRI) are helping to improve the capabilities of the nation's Multi- Disciplinary Intelligence (Multi-INT) system, which monitors incoming data.

Posted in: News, Defense, Software
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Researchers Develop Harder Ceramic for Armor Windows

The Department of Defense needs materials for armor windows that provide essential protection for personnel and equipment while still having a high degree of transparency. To meet that need, scientists at the U.S. Naval Research Laboratory (NRL) have developed a method to fabricate nanocrystalline spinel that is 50% harder than the current spinel armor materials used in military vehicles. With the highest reported hardness for spinel, NRL's nanocrystalline spinel demonstrates that the hardness of transparent ceramics can be increased simply by reducing the grain size to 28 nanometers. This harder spinel offers the potential for better armor windows in military vehicles, which would give personnel and equipment — such as sensors — improved protection, along with other benefits.

Posted in: News, Defense, Ceramics
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Insect-Inspired Technology Could Extend Situational Awareness

Soldiers' missions frequently lead them to locations where they must assess the status of structures, and where the presence of threats is not immediately known or easily detectable. These threats include everything from ambushes to chemical and biological threats that could be lurking around every corner. Current technology assists soldiers in detecting these possible threats by allowing them to assess structures and threats through the use of teleoperated sensing systems.

Posted in: News, Defense
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3D-Printing Aerial Robot Mimics Tiny Bird

Scientists from Imperial College London have developed a 3D-printing Micro Aerial Vehicle (MAV) that mimics the way that swiftlets build their nests.

The MAV is a quad-copter, with four blades that enable it to fly and hover. The vehicle, made from off-the-shelf components, carries in its underbelly two chemicals that create polyurethane foam when mixed, and a printing module to deliver the foam. The foam can then be used to build simple structures or repair components.

The texture of the polymer exuded from the 3D printer can also be used to create ’grippers,‘ which stick onto and transport objects to different locations. The MAV could therefore pick up and remove bombs, or dispose of hazardous materials without exposing humans to danger.

The next step for the team is to enable the vehicle to fly autonomously in any environment. The scientists plan to incorporate high-speed cameras and sensors on board the MAV, which will act like a satellite navigation system for tracking and controlling of the flight trajectory.

Source

Also: Learn more about NASA's Robonaut 2.

Posted in: News, Aerospace, Aviation, Defense, Imaging, Manufacturing & Prototyping, Rapid Prototyping & Tooling, Materials, Plastics, Automation, Robotics, Sensors
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Wind Tunnel Tests Support Improved Design of B61-12 Bomb

Sandia National Laboratories has finished testing a full-scale mock unit representing the aerodynamic characteristics of the B61-12 gravity bomb in a wind tunnel. The tests on the mock-up were done to establish the configuration that will deliver the necessary spin motion of the bomb during freefall and are an important milestone in the Life Extension Program to deliver a new version of the aging system.

Posted in: News, Aerospace, Defense, Motion Control, Motors & Drives, Test & Measurement
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New Biosensor Will Guard Water Supplies From Toxic Threats

Supported by a $953,958 grant from the Defense Advanced Research Projects Agency (DARPA), researchers at the University of California San Diego will develop a sophisticated new biosensor that can protect the nation's water supplies from a wide range of toxins, including heavy metals and other poisons.

Posted in: News, Defense, Sensors
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Pocket-Sized Anthrax Detector Aids Global Agriculture

A credit-card-sized anthrax detection cartridge developed at Sandia National Laboratories and recently licensed to a small business makes testing safer, easier, faster and cheaper.

Bacillus anthracis, the bacteria that causes anthrax, is commonly found in soils all over the world and can cause serious, and often fatal, illness in both humans and animals. The bacteria can survive in harsh conditions for decades. In humans, exposure to B. anthracis may occur through skin contact, inhalation of spores or eating contaminated meat.

The new device, which is more like a pocket-sized laboratory, could cost around $5-7 and does not require a battery, electric power, or other specialized tools to operate.

Source

Also: See other Sensors tech briefs.

Posted in: News, Defense, Green Design & Manufacturing, Detectors, Sensors
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Transient Electronics Dissolve When Triggered

An Iowa State research team led by Reza Montazami is developing "transient materials" and "transient electronics" that can quickly and completely melt away when a trigger is activated. The development could mean that one day you might be able to send out a signal to destroy a lost credit card.

To demonstrate that potential, Montazami played a video showing a blue light-emitting diode mounted on a clear polymer composite base with the electrical leads embedded inside. After a drop of water, the base and wiring began to melt away.

As the technology develops, Montazami sees more and more potential for the commercial application of transient materials. A medical device, once its job is done, could harmlessly melt away inside a person’s body. A military device could collect and send its data and then disappear, leaving no trace of an intelligence mission. An environmental sensor could collect climate information, then wash away in the rain.

Source

Also: Read other Electronics & Computers tech briefs.

Posted in: News, Defense, Electronic Components, Electronics, Electronics & Computers, Environmental Monitoring, Green Design & Manufacturing, LEDs, Lighting, Composites, Materials, Plastics, Medical, Semiconductors & ICs
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Wireless Device Senses Chemical Vapors

A research team at the Georgia Tech Research Institute (GTRI) has developed a small electronic sensing device that can alert users wirelessly to the presence of chemical vapors in the atmosphere. The technology, which could be manufactured using familiar aerosol-jet printing techniques, is aimed at myriad applications in military, commercial, environmental, and healthcare areas.

The current design integrates nanotechnology and radio-frequency identification (RFID) capabilities into a small working prototype. An array of sensors uses carbon nanotubes and other nanomaterials to detect specific chemicals, while an RFID integrated circuit informs users about the presence and concentrations of those vapors at a safe distance wirelessly.

Because it is based on programmable digital technology, the RFID component can provide greater security, reliability and range – and much smaller size – than earlier sensor designs based on non-programmable analog technology. The present GTRI prototype is 10 centimeters square, but further designs are expected to squeeze a multiple-sensor array and an RFID chip into a one-millimeter-square device printable on paper or on flexible, durable substrates such as liquid crystal polymer.

Source

Also: Learn about Extended-Range Passive RFID and Sensor Tags.

Posted in: News, Communications, Wireless, Defense, Electronic Components, Electronics, Electronics & Computers, Environmental Monitoring, Green Design & Manufacturing, Manufacturing & Prototyping, Medical, Nanotechnology, RF & Microwave Electronics, Semiconductors & ICs, Detectors, Sensors
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