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MILITARY/HOMELAND SECURITY/AEROSPACE NEWS
Wireless Sensor Networks—Solutions and Market Opportunities
The Research and Markets study reports on current trends and the future prospects of the technology that promises to revolutionize the way we live, work, and interact with the physical environment.
FLIR Introduces Low-Cost Thermal-Imaging Camera
The system is targeted at emerging thermography markets.
Firms Announce Breakthrough in the Manufacture of CdTe on Silicon
Sunovia and EPIR have discovered a method to rapidly produce the material, which will greatly reduce the cost of high-efficiency solar cells and night-vision detectors and cameras.
MILITARY
Nonintrusive, Wearable Bioelectrodes for Monitoring the Heart and Brain
Improved noncontact electrodes and noninvasive hybrid biosensors enable fast, reliable readings of hearts and brains, without requiring contact with the skin.
Monitoring Within and Without
Firefighters and HazMat workers have a very tough job. They're frequently in heavy gear, in unfriendly atmospheres, and working hard. Unfortunately, this combination of equipment, environment, and job stress means that frequently they're operating at the limits of human endurance.
Beacons on the Battlefield
It's a fact that, in the chaos of the battlefield (and especially in confused urban warfare situations), people die from so-called "friendly fire." Adapting a MEMS technology developed for use in gas sensors, ICx Ion Optics has created IR emitters tuned to night-vision wavelengths.
HOMELAND SECURITY
On-Site Trace Chemical Detection, Part 1:
The first installment of this two-part series discusses ion mobility spectroscopy (IMS), the leading contender for fast and reliable detection of trace chemicals, and differential ion mobility spectroscopy (DMS), a related technology that provides faster, smaller and more sensitive sensors capable of detecting chemicals in environments with greater concentrations of interfering substances.
New Implementations of OGC Sensor Web Enablement Standards
Wildfires, river basins, tsunami alerts, and environmental risk management are just some of the projects using OGC's interoperability framework for Web-based access and control of sensors and sensor data.
The Big Picture: Sensor Webs in Disaster Response Demo
In an increasingly wired world, knitting together data from disparate sources into an interoperable whole can present disaster managers and first responders with critical information during a major emergency or crisis. Building on a vendor-neutral interoperability framework for Web-based discovery, access, control, integration, and visualization of online sensors, the Open Geospatial Consortium (OGC) tested this idea in a December 2006 disaster response demo.
AEROSPACE
3D Image Correlation: Measuring Displacement and Surface Strain
3D image correlation is a general-purpose strain measurement tool that allows us to measure 3D displacement and the true surface strains of any material without contact and without many of the difficulties associated with these measurements.
Look to the Birds
Oxford University zoologists Graham Taylor and Adrian Thomas have outfitted an eagle with four miniature high-speed spy cameras and other instruments in a 15 g pack to learn more about its aviational secrets. An inertial measurement unit recorded details of the bird's aerobatics and transmitted the data to a receiver on the ground.
Cleared for Travel? Using a Gaussmeter to Check Magnetic Materials Before Shipment
Increasingly strict regulations present a challenge to those shipping magnetized materials. Here's how a Hall effect gaussmeter can help.
TRADE SECURITY
Sense and Respond Networks for Agile, Secure Distribution
Active RFID tags can store entire manifests and routing schedules as well as sensor data.
Mesh Radio Network Performance in Cargo Containers
Wireless sensors installed inside a cargo container? Aren't they metal? Then the radio signal can't get out . . .or can it? Here's how mesh-networked 2.4 GHz, 802.15.4-compliant RF transceivers performed when placed within cargo containers.
Freight Fright Reduction
GE's security business (www.ge.com ) has completed the first commercial field test of the Tamper Evident Secure Container (TESC), a freight container developed jointly with the world's leading manufacturer of maritime shipping containers, China International Marine Containers Group Ltd. (CIMC).
FEATURED ARTICLES
Linear Avalanche Photodiodes Enable Single Photon Sensors
Single photons are elementary particles that are arguably the most tangible, yet some of the most difficult to detect and characterize as single entities. Techniques to count single photons require optical detectors with linear operation, high gain, wide bandwidth and low noise. This article will describe a variety of approaches to detect and count single photons, the key measurement metrics, and potential applications of single photon sensors.
Three’s a Crowd for Instrumentation Amplifiers
By using an indirect current-feedback topology, instrumentation amplifiers can avoid some of the pitfalls inherent in using three op amp instrumentation amplifiers powered from single supply voltages.
Market Prospects for Position Sensors
The proportion of industry sales varies widely among sensing technologies, with proximity sensors taking the largest market share. While the smallest share belongs to linear displacement devices, this category is forecast to experience the highest growth.
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