Test & Measurement

New Lab Helps Boeing Detect Aircraft Flaws

Researchers at Missouri University of Science and Technology and The Boeing Company established a new nondestructive evaluation (NDE) laboratory that uses millimeter-wave technology to improve the detection of potential flaws in coatings, surfaces, and materials.

Posted in: News, Aerospace, Defense, Instrumentation
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Simulating and Analyzing Flow for an Air-to-Air Refueling System

Long-range bombers may have missions halfway around the world. Fighter jets may have to stay in the air longer than their relatively small fuel tanks will allow, or may find they have exhausted their fuel unexpectedly, such as during supersonic flight or evasive maneuvers. In these situations, large tanker aircraft are deployed that carry sufficient fuel to refill several smaller aircraft in a single mission (Figure 1). The task of injecting volatile jet fuel from one aircraft to another while both are moving at high speed and altitude is fraught with risk.

Posted in: Articles, Aerospace, Test & Measurement, Computer simulation, Refueling, Aerodynamics, Freighter aircraft
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Using High Bandwidth Oscilloscopes to Analyze Radar and Electronic Warfare Systems

Whether for multi-channel analysis, or for wider analysis bandwidth in a measurement, high bandwidth oscilloscopes offer an alternative to traditional spectrum and signal analyzers for both pulsed RF aerospace/defense and I/Q vector modulated communications application measurements. Signals with spectral content beyond 1 or 2 GHz are now being created to support the higher resolution requirements in radar systems and to move the vast amounts of information in new communications systems.

Posted in: Articles, Aerospace, Communications, Wireless, Defense, RF & Microwave Electronics, Test & Measurement, Data exchange, Oscilloscopes, Radar, Military vehicles and equipment
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The Effect of Substrate Emissivity on the Spectral Emission of a Hot-Gas Overlayer

Recently, in operando optical investigations of high temperature solid oxide electrochemical cells (SOECs) have gained significant traction with several research groups motivated by a need to directly correlate electrochemical performances of SOECs with their associated and complex electrode processes. These techniques (including Raman spectroscopy, ambient x-ray photoelectron spectroscopy, near-infrared thermal imaging, and Fourier transform infrared emission spectroscopy) have demonstrated a significant advantage over traditional, indirect experimental methods by providing direct, non-invasive information in real time along with high temporal, spatial, and/or molecular resolution.

Posted in: Briefs, Aerospace, Defense, Test & Measurement, Spectroscopy, Emissions, Test procedures, Thermal testing
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Experimental Setup to Assess Blast and Penetration- Induced Secondary Debris in a Military Operations in Urban Terrain (MOUT) Environment

As part of Project Agreement on Military Operations in Urban Terrain (MOUT), the US Army Research Laboratory’s (ARL’s) Explosives Effects Branch supported a series of experiments conducted in Meppen, Germany (DEU), to understand loading on personnel protective equipment (PPE) produced during urban weapon attacks. These experiments were conducted by detonating an explosive charge placed on a brick wall to create secondary debris that would impact the US-designed collection medium.

Posted in: Briefs, Aerospace, Defense, Test & Measurement, Fabrics, Foams, Plastics, Impact tests, Protective equipment, Military vehicles and equipment
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Non-Contact Circuit for Real-Time Electric and Magnetic Field Measurements

An energized electric power cable generates low-frequency electric and magnetic fields that are related to the voltages and currents. Especially at wavelengths λ>>d, where d is the distance away from an energized conductor and λ is the signal wavelength, we can extract electrical information with quasi-static near-field electric and magnetic field theory and the Principle of Superposition.

Posted in: Briefs, Aerospace, Defense, Test & Measurement, Electric cables, Electromagnetic compatibility, Conductivity
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Sensing Suspicious Powders Using Noncontact Optical Methods

Suspicious powder incidents continue to be a disruptive and costly problem. In-situ assessment of suspicious powders within inorganic matrices, particularly with powders of biological origin, is currently limited to detection by biochemical methodologies that react with monomers such as amino acids, nucleic acids, lipids, or macromolecule compounds comprised of these basic subunits. Current optical methods such as Raman spectroscopy using excitation in the near infrared at 785 nm or visible at 532 nm, have not been able to detect or distinguish biological materials from background or other materials.

Posted in: Briefs, Defense, Sensors, Instrumentation, Test & Measurement, Optics, Biohazards
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Signal Conditioning Modules

Precision Filters Inc. (Ithaca, NY) has introduced a new family of signal conditioning modules for measurement systems built on National Instruments™ rugged, compact, low power cRIO™ platform. The four analog input/output modules condition charge, bridge, dynamic strain, IEPE or voltage-based sensors. With the supplied LabView™ driver VI, you can integrate PFI™ signal conditioning module technology with proven NI™ voltage input A/D modules to build a complete high performance sensor measurement system for charge, voltage, bridge and dynamic strain.

For applications where a rugged, low-power, compact standalone signal conditioning system is required as a front-end for a data acquisition system, the new signal conditioning modules can be housed in low-cost 4-slot or 8-slot chassis and controlled by PFI’s Graphical User Interface software with no code development needed. All modules feature fully programmable gain and excitation and are equipped with Precision Filters’ Test Input for inserting calibration signals at the module input allowing full end-to-end verification.

For Free Info Visit http://info.hotims.com/55588-513

Posted in: Products, Defense, Consumer Product Manufacturing, Measuring Instruments, Test & Measurement
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Damping Measurement for Wafer-Level Packaged MEMS Acceleration Sensors

Microelectromechanical system (MEMS) three-axis acceleration threshold sensors have been developed to measure acceleration threshold levels using voltage switching when the threshold is reached. Determining damping coefficients is important for categorizing how each threshold sensor or switch operates. Switches with different damping coefficients result in different mechanical impedances and response times. Analytical and numerical methods to model damping coefficient values based on empirical data are needed to characterize three-axis acceleration sensors; traditional methods use the displacement of an underdamped system to calculate the damping ratio.

Posted in: Briefs, Defense, MEMs, Sensors, Measuring Instruments, Sensors and actuators, Switches
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Digital Meter

The New Technology Meter (NTM) from OTEK (Tucson, AZ) has everything you need to measure and control your process while operating with less than 50mW of power. OTEK’s NTM boasts a full tricolor bargraph with 2% resolution and four alarm set points. The NTM includes isolated Serial I/O, isolated O.C.T. or SPDT relays and isolated analog output with P or PID algorithm. OTEK has included signal failure (open or short) detection with date and time transmission. The meter is available in over 30 different input signals. It is also available in loop or signal powered versions, but feature restrictions apply.

The NTM-9 replaces fit, form and function any 6" × 1.74" panel cut-out and has up to two channels. The meter is available in an industrial plastic or a metal housing and can meet nuclear or military grades.

For Free Info Visit http://info.hotims.com/55588-515

Posted in: Products, Defense, Consumer Product Manufacturing, Measuring Instruments
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