Sensors & Test

Test & Measurement

Briefs : Photonics/Optics
Enabling Microliquid Chromatography by Microbead Packing of Microchannels

The microbead packing is the critical element required in the success of onchip microfabrication of critical microfluidic components for in-situ analysis and detection of chiral amino acids. In order for microliquid chromatography to occur, there must be a stationary phase...

Briefs : Test & Measurement
Cogging Torque Analysis of a Permanent Magnet Machine in a Wind Turbine

Permanent magnet machines are used in many industrial applications because of their ability to produce high power densities. The market for such machines has been expanding due to the availability of affordable magnet materials, technological improvements, and advances in...

Briefs : Test & Measurement
Fast, High-Precision Readout Circuit for Detector Arrays

The GEO-CAPE mission described in NASA’s Earth Science and Applications Decadal Survey requires high spatial, temporal, and spectral resolution measurements to monitor and characterize the rapidly changing chemistry of the troposphere over North and South Americas. High-frame-rate focal...

Briefs : Test & Measurement
A System for Measuring the Sway of the Vehicle Assembly Building

A system was developed to measure the sway of the Vehicle Assembly Building (VAB) at Kennedy Space Center. This system was installed in the VAB and gathered more than one total year of data. The building movement was correlated with measurements provided by three wind towers in...

Briefs : Test & Measurement
ISS Ammonia Leak Detection Through X-Ray Fluorescence

Ammonia leaks are a significant concern for the International Space Station (ISS). The ISS has external transport lines that direct liquid ammonia to radiator panels where the ammonia is cooled and then brought back to thermal control units. These transport lines and radiator panels are...

Briefs : Physical Sciences
Hydrometeor Size Distribution Measurements by Imaging the Attenuation of a Laser Spot

The optical extinction of a laser due to scattering of particles is a well-known phenomenon. In a laboratory environment, this physical principle is known as the Beer-Lambert law, and is often used to measure the concentration of scattering particles in a fluid...

Briefs : Physical Sciences
Victim Simulator for Victim Detection Radar

Testing of victim detection radars has traditionally used human subjects who volunteer to be buried in, or climb into a space within, a rubble pile. This is not only uncomfortable, but can be hazardous or impractical when typical disaster scenarios are considered, including fire, mud, or liquid waste....

Application Briefs : Test & Measurement
Data Management to Support Assembly and Integration of Orion

MEI Technologies is part of the ARES Technical Services Corp. team performing work at NASA’s Johnson Space Center in Houston for the Multi-Purpose Crew Vehicle (MPCV) Program Integration Contract. MEI will provide system engineering and integration to support development, assembly,...

Articles : Test & Measurement
Network Interface Links Sensor-Web Instruments

NASA Airborne Science operates a fleet of aircraft in conjunction with orbiting satellites for Earth observations. In 2004, NASA started planning missions to employ constellations of instruments flying on those platforms that would mutually interact and communicate as a network with stations on the...

Application Briefs : Sensors/Data Acquisition
LIDAR System Enables Global Mapping of Carbon Sources

As a step toward taking active global measurements from space, ITT Exelis and NASA Langley Research Center completed a flight campaign that calculated carbon dioxide over various surfaces and conditions.

Application Briefs : Test & Measurement
Relays Enable Curiosity Rover’s Chemistry Instrument

NASA’s Curiosity rover landed in the Gale Crater on Mars on August 5, having flown over 127 million miles since its November 2011 launch. As part of NASA’s Mars Exploration Program, Curiosity will look for evidence of past or present habitable environments.

Products : Electronics & Computers
Hybrid and Electric Vehicle Test System

SAKOR Technologies, Inc. (Okemos, MI) designed and installed a complete turnkey Hybrid and Electric Vehicle Test System for UQM Technologies, Inc. (Longmont, CO), a manufacturer of high-efficiency electric propulsion systems. UQM will use the system to test inverters and traction motors for use in hybrid...

Briefs : Test & Measurement
Beat-to-Beat Blood Pressure Monitor

This device provides non-invasive beat-to-beat blood pressure measurements and can be worn over the upper arm for prolonged durations. Phase and waveform analyses are performed on filtered proximal and distal photoplethysmographic (PPG) waveforms obtained from the brachial artery. The phase analysis is used...

Articles : Test & Measurement
Optimizing Finite Element Material Models in a Crash Test Dummy

Finite element representations of crash test dummies are widely used in the simulation of vehicle safety systems. The biofidelity of such models is strongly dependent on the accurate representation of the nonlinear behavior of the constituent rubber, plastic, and foam materials....

Articles : Test & Measurement
Influence of Position Measurement on Accuracy in 5-Axis Machining

Productivity and accuracy are important attributes in the competition for machine tools. Five-axis machining provides considerable potential for increasing productivity. In many cases it permits higher metal removal rates than 3-axis machining. Production times can be...

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