Test & Measurement

Access our comprehensive library of technical briefs on test and measurement, from engineering experts at NASA and government, university, and commercial laboratories.

Motion Design : Test & Measurement
Calculating the Estimated Fatigue Life of a Disc Spring

In discussing fatigue life, it is important to distinguish between disc springs and conical spring washers, as they differ by design and intended usage. Conical spring washers are...

Briefs : Test & Measurement
Systems and Methods for Correcting Optical Reflectance Measurements

Optical spectroscopy can be used to determine the concentration of chemical species in samples. The amount of light absorbed by a particular chemical species is often linearly related to its concentration through Beer’s Law. For nontransparent materials such as powders,...

Briefs : Test & Measurement
Non-Destructive Evaluation (NDE) of Structures Using Transient and Lock-in Thermography

Researchers at NASA’s Johnson Space Center improved their Flash Thermography capabilities by incorporating transient and lock-in thermography. By...

Briefs : Manufacturing & Prototyping
Safety Analysis: The Key to a Single-Pass ISO26262 Random Fault Workflow

Advanced driver-assistance systems and autonomous drive technologies increase the complexity of automotive integrated circuits (ICs), making it harder to ensure that...

Briefs : Imaging
In-Situ Characterization and Inspection of Additive Manufacturing Deposits Using Transient Infrared Thermography

Additive manufacturing, or 3D printing, is a rapidly growing field in which solid objects can be produced layer-by-layer. This...

Briefs : Energy
Measurement Method for Radioactive Methane

Anew method for measuring radioactive methane is an optical one based on spectroscopy. Previously, radioactive methane has been measured with accelerator mass spectrometry involving expensive machines. Optical measuring could be a cheaper and more agile method.

Briefs : Test & Measurement
Radiometric Temperature Measurement Using a DLP-Based Pyrometer

Researchers at NASA’s Armstrong Flight Research Center have identified and evaluated recently available miniature spectrometers that enable compact and robust pyrometry...

Briefs : Manufacturing & Prototyping
Fast and Accurate Simulation of Manufactured Parts with Defects

Unwanted porosity is typical to many manufacturing processes — from traditional casting to additive manufacturing (3D printing) — and is difficult to avoid entirely....

Briefs : Test & Measurement
S-Curve Time-of-Flight Mass Spectrometer

Time-of flight mass spectrometers are commonly used in analytical chemistry and many other applications. They contain a region where ions travel toward a detector. A new geometry was developed that...

Briefs : Communications
High-Performance, Current-Steering Digital-to-Analog Converter

A current-steering digital-to-analog converter (DAC) was developed that achieves improved switching times (up to 75% faster) in high-speed (gigahertz), high-resolution (8-14...

Briefs : Medical
Method Shrinks Objects to the Nanoscale

Existing techniques for creating nano-structures are limited in what they can accomplish. Etching patterns onto a surface with light can produce 2D nano-structures but doesn’t work for 3D structures....

Briefs : Imaging
Pocket-Sized Imaging Device Improves Accuracy Of Epidural Placement

A team of bioengineers supported through a Small Business Innovation Research grant from the National Institute of Biomedical Imaging and Bioengineering (NIBIB) has...

Briefs : Manufacturing & Prototyping
Researchers Create Smartphone System to Test for Lead in Water

Researchers at the University of Houston have created an inexpensive system that can detect lead in tap water at levels commonly accepted as dangerous, using a lens made with an...

Briefs : Test & Measurement
Technique Provides Rapid Assessment of Radiation Exposure

Researchers have developed a new technique that assesses radiation exposure in about an hour using an insulator material found in most modern electronics. The technique can be used to triage medical cases in the event of a radiological disaster.

Briefs : Communications
Using Common WiFi to Detect Weapons, Bombs, and Chemicals in Bags

Ordinary WiFi can easily detect weapons, bombs, and explosive chemicals in bags at museums, stadiums, theme parks, schools, and other public venues using a low-cost suspicious...

Briefs : Test & Measurement
Extrans Permeation Measurement System

Many applications in science and industry require an apparatus that creates a controlled amount of a fluid introduced into another fluid. For instance, some material corrosion testing applications...

Briefs : Communications
Signal Combiner for Wideband Communication

NASA’s Glenn Research Center has devised an efficient new method of combining primary and secondary signals with minimal loss and noise. With its ability to reduce system noise, this novel signal combiner delivers the best opportunity to receive a desired signal not easily distinguished from...

Briefs : Sensors/Data Acquisition
Polarization Imaging Sensor for Enhanced Scene Analysis

Along with intensity and color, polarization is a property of light that can provide useful information for scene analysis; however, the human eye and most cameras cannot detect...

Briefs : Test & Measurement
Wear-Resistant Platinum Gold Alloy

From cellphones to satellites, industry spends millions on traditional gold alloy electrical contact coatings. While gold and other metal alloys have been an industry standard to protect metal components...

Briefs : Materials
Transparent Test Patch Determines Food Contamination

A transparent test patch, printed with harmless molecules, signals food contamination as it happens. The patch can be incorporated directly into food packaging, where it can monitor the contents for harmful pathogens such as E. coli and Salmonella. The new technology has the potential to...

Briefs : Imaging
Virtual Test Laboratory

The mechanical properties of sheet metal materials are directional. Their deformation behavior and their strength differ significantly depending on the viewing direction; for example, in the direction of rolling, or...

Briefs : Energy
Measurement Technique for Continuous-Wave, Modulated, and Pulsed Monochromatic Radiation

In many applications, such as remote sensing of atmospheric trace gases, monochromatic radiation with multiple discrete wavelengths is required. To date, there no instrument or technique that measures the wavelength jitters and fluctuations in real time.

Briefs : Sensors/Data Acquisition
Laser Ranging Can See 3D Objects Melting in Fires

Optical range measurements, already used in manufacturing and other fields, may help overcome practical challenges posed by structural fires, which are too hot to measure with conventional...

Briefs : Test & Measurement
Chip Measures Quantities with Quantum Precision

Many devices use light to probe the quantum states of atoms in a vapor confined in a small cell. Atoms can be highly sensitive to external conditions, and therefore make superb detectors....

Briefs : Test & Measurement
Regional Hydrologic Extremes Assessment System (RHEAS) Software

Drought is Africa’s principal type of natural disaster and is at the core of serious threats to the livelihoods of millions of people and the natural resources on which they depend. The economies of many African countries are based on agricultural activities that are controlled...

Briefs : Sensors/Data Acquisition
Quantum Radio Aids Communications and Mapping

GPS signals do not penetrate very deeply or at all in water, soil, or building walls, and therefore can’t be used by submarines or in underground activities such as surveying mines. GPS also...

Briefs : Test & Measurement
New Fast, Economical Bioimaging Technique

Researchers at Rensselaer Poytechnic Institute (RPI) have developed a new approach to optical imaging that makes it possible to quickly and economically monitor multiple molecular interactions in a...

Briefs : Mechanical & Fluid Systems
MEMS Switch Extends Life of Cellphones

A new type of microelectromechanical system (MEMS) was developed that uses electrostatic levitation to provide a more robust system. All cellphones use MEMS switches for wireless communication, but traditionally there are just two electrodes. The switches open and close numerous times during just one hour,...

Briefs : Electronics & Computers
Efficient Security for Cloud-Based Machine Learning

Outsourcing machine learning is a rising trend in industry. Major tech firms have launched cloud platforms that conduct computation-heavy tasks, such as running data through a convolutional...

Briefs : Manufacturing & Prototyping
System Selectively Sequesters Toxins from Water

Traditional methods, such as reverse osmosis, that remove contaminants from water are expensive and energy-intensive. Researchers have developed technology to remove contaminants from water,...

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