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Infrared Radiation Detectors for Thermographic Imaging

Thermographic imaging is accomplished with a camera that converts infrared radiation (IR) into a visual image that depicts temperature variations across an object or scene. The main IR camera components are a lens, a detector in the form of a focal plane array (FPA), possibly a cooler for the detector, and the electronics and software for processing and displaying images (see Figure 1). Most detectors have a response curve that is narrower than the full IR range (900 to 14,000 nanometers or 0.9 to 14 μm). Therefore, a detector (or camera) must be selected that has the appropriate response for the IR range of a user’s application. In addition to wavelength response, other important detector characteristics include sensitivity, the ease of creating it as a focal plane array with micrometer-size pixels, and the degree of cooling required, if any.

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Designing Software Radio Systems With FPGAs

Software defined radio technology has been widely adopted for new military and aerospace platforms, government signal intelligence and homeland security systems, and now more extensively in commercial wireless voice and data networks as well. These modern communication systems need to squeeze more channels of traffic into an expensive slice of precious radio spectrum. Military and government requirements for secure communications mandate real-time encryption and decryption schemes that must be increasingly more resistant to interception. In multinational theater of war combat operations, communications systems must selectively ensure certain specific links and reliably deny others.

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RapidIO vs. Ethernet A Practical Technical Comparison

Ethernet is currently the incumbent backplane technology across a wide range of storage, wireless, wireline, military, industrial, and other embedded applications as developers move away from proprietary implementations in an effort to reduce development time and cost while increasing performance and functionality. However, as data rates increase, it has become apparent that many high-performance applications exceed the limits of this traditional protocol. Designing an efficient embedded backplane interconnect with excellent performance requires addressing a number of key design challenges, including header efficiency, protocol processing efficiency, effective bandwidth, and quality of service while strictly managing cost. To meet these challenges, many developers are turning to RapidIO® technology as an alternative to Ethernet.

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Modeling System Architecture and Resource Constraints Using Discrete-Event Simulation

Optimizing system resource utilization is a key design objective for system engineers in communications, electronics, and other industries. System resources such as processors, memory, or bandwidth on a communication bus are often shared by various components in the system. To understand the utilization of a shared resource, system engineers must do two things: they must identify constraints on the resource, such as number of processors and memory size, and they must analyze the effect of input traffic or load on the shared resource.

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NASA Awards 2007 Software of the Year

Software from Jet Propulsion Laboratory for detecting planets outside our solar system, and from Ames Research Center for defining safety margins for fiery spacecraft re-entries have been named co-winners of the 2007 NASA Software of the Year Award. The NASA Software of the Year competition was initiated in 1994, and rewards outstanding software developed by the agency. The competition is sponsored by the NASA Chief Engineer, with technical support from NASA’s In ventions and Contributions Board. For more information on the 2007 winners and runners-up, .

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Embedded Computing Options Meet Rugged Industrial Requirements

While industrial applications typically require high levels of reliability, availability, ruggedness, and longevity, there often is a set of unique system requirements dependent upon the specific goals of the system. For instance, an industrial automation application may call for a particular I/O interface or the ability to support custom control software.

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Getting Real-Time Performance From A Full-Featured OS

Spend a few minutes at your local electronics store and it’s obvious — the mobile phone is a device that far surpasses its original intent. With respect to functionality, today’s mobile phone goes well beyond the ability to make calls and store phone numbers. It also synchs up with your desktop’s calendar and address book, it can take pictures, play and store music, and receive emails.

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