Special Coverage

Active Aircraft Pylon Noise Control System
Unmanned Aerial Systems Traffic Management
Method of Bonding Dissimilar Materials
Sonar Inspection Robot System
Applying the Dynamic Inertia Measurement Method to Full-Scale Aerospace Vehicles
Method and Apparatus for Measuring Surface Air Pressure
Fully Premixed, Low-Emission, High-Pressure, Multi-Fuel Burner
Self-Healing Wire Insulation
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LED Panel-Mount Indicators

Dialight Corp., Farmingdale, NJ, has expanded its line of LED panel-mount indicators with the addition of the 612 and 616 series for front-panel mounting in 12-mm and 16-mm holes and panel thicknesses up to 6.3 mm. The RoHS-compliant indicators are designed for applications such as main/remote power indication, status indication, maintenance/warning indication, and instrumentation.

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Low-Angle Ring Light

The PresencePLUS® low-angle ring lights from Banner Engineering Corp., Minneapolis, MN, connect to vision sensors or an external power supply to provide optimal illumination of an inspected part by enhancing the contrast of surface features. The low-angle ring lights can be used in applications such as illuminating stamped or dot-peen bar codes; detecting etchings in glass, metal, or plastic; and counting solder balls.

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Infrared Camera System

FLIR Systems, North Billerica, MA, offers the ThermoVision® A320 Research infrared camera system. With the integrated ThermaCAM Researcher Software, the camera system provides a flexible solution for precision temperature measurement and real-time thermal analysis for research and development applications.

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CCD Camera

The 16-megapixel GE4900 ultra-high-resolution CCD camera from Prosilica, Vancouver, BC, Canada, runs three frames per second at 4872 × 3248 pixel resolution over a GigE Vision-compliant Gigabit Ethernet interface. The industrial digital camera incorporates a Kodak KAI-16000 progressive scan CCD sensor with electronic global shutter suitable for capturing high-speed motion events. Exposure times are programmable from 1/100,000 to 60 seconds.

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Ka-Band TWT High-Efficiency Power Combiner for High-Rate Data Transmission

Two-way combiner waveguide circuit can be concatenated for 2n-way combining. A four-port magic-T hybrid waveguide junction serves as the central component of a high-efficiency two-way power combiner circuit for transmitting a high-rate phase-modulated digital signal at a carrier frequency in the Ka-band (between 27 and 40 GHz). This power combiner was developed to satisfy a specific requirement to efficiently combine the coherent outputs of two traveling-wave-tube (TWT) amplifiers that are typically characterized by power levels on the order of 100 W or more. In this application, the use of a waveguide-based power combiner (instead of a coaxial-cable- or microstrip-based power combiner, for example) is dictated by requirements for low loss, high powerhandling capability, and broadband response. Combiner efficiencies were typically 90 percent or more over both the linear and saturated output power regions of operation of the TWTs.

Posted in: Briefs, Electronics & Computers

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Switched Band-Pass Filters for Adaptive Transceivers

Switched filters could be reconfigured to conform to diverse standards. Switched band-pass filters are key components of proposed adaptive, software- defined radio transceivers that would be parts of envisioned digital-data- communication networks that would enable real-time acquisition and monitoring of data from geographically distributed sensors. Examples of sensors to be connected to such networks include security cameras, radio-frequency identification units, and geolocation units based on the Global Positioning System. Through suitable software configuration and without changing hardware, these transceivers could be made to operate according to any of a number of complex wireless-communication standards that could be characterized by diverse modulation schemes, bandwidths, and data-handling protocols.

Posted in: Briefs, Electronics & Computers

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Loss-of-Control-Inhibitor Systems for Aircraft

Excessive commands are resisted by feedback in the form of damping forces. Systems to provide improved tactile feedback to aircraft pilots are being developed to help the pilots maintain harmony between their control actions and the positions of aircraft control surfaces, thereby helping to prevent loss of control. A system of this type, denoted a loss-of-control-inhibitor system (LOCIS) can be implemented as a relatively simple addition to almost any pre-existing flight-control system. The LOCIS concept offers at least a partial solution to the problem of (1) keeping a pilot aware of the state of the control system and the aircraft and (2) maintaining sufficient control under conditions that, as described below, have been known to lead to loss of control.

Posted in: Briefs, Electronics & Computers

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