Test & Measurement

Measurement of Cryogenic Fluid Level with Laser Propagation and Surface Floor Reflection

The current float sensing system can be augmented with this new development. Stennis Space Center, Mississippi The risks associated with introducing new hardware and methods into an operational environment have in part prohibited cryogen level measurement technology from advancing. In prior art, measurements have been made with invasive probes immersed in the cryogenic fluid. Implementing this approach would require physical retrofitting, as well as requiring the measuring instrument to make contact with the harsh cryogen fluid environment. However, an externally mounted optical measurement system would mitigate these concerns. Therefore, an optical approach was developed that uses and augments existing validated technology in a manner that does not interfere with the current infrastructure.

Posted in: Briefs

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Video Acuity Measurement System

The smallest letters that can be automatically identified are used to rate the video system. Ames Research Center, Moffett Field, California There is a widely acknowledged need for metrics to quantify the performance of video systems. Existing metrics are either difficult to measure or are largely theoretical. They do not reflect the full range of effects to which video may be subject, or do not relate easily to video performance in real-world tasks. The empirical Video Acuity metric is simple to measure and relates directly to task performance. Video acuity is determined by the smallest letters that can be automatically identified using a video system. It is expressed most conveniently in letters per degree of visual angle.

Posted in: Briefs

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Heat-Flow Probe Design and Development

Applications include measuring heat flow on Earth, where optimal thermal isolation of heaters/temperature sensors is important. Marshall Space Flight Center, Alabama The lunar regolith exhibits extremely low conductivity. Penetrating the regolith presents problems if the geo-technical properties of the regolith are not well understood and accounted for.

Posted in: Briefs

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Custom Surface Inspection System for Safety-Critical Processes

Researchers have engineered a high-precision modular inspection system that can be adapted on a customer-specific basis and integrated into the production process. Before a workpiece leaves the production plant, it is subjected to rigorous inspection. For safety-critical applications such as in the automotive or aerospace industries, manufacturers can only use the most impeccable parts.

Posted in: News, Cameras, Consumer Product Manufacturing, Industrial Controls & Automation, Measuring Instruments

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New Laser Technology to Make 2020 Mission to Mars

NASA announced recently that laser technology originally developed at Los Alamos National Laboratory has been selected for its new Mars mission in 2020. SuperCam, which builds upon the successful capabilities demonstrated aboard the Curiosity Rover during NASA’s current Mars Mission, will allow researchers to sample rocks and other targets from a distance using a laser.

Posted in: News, Electronics, Lasers & Laser Systems, Photonics, Machinery & Automation, Detectors, Sensors, Measuring Instruments

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Envelope Tracking and Digital Pre-Distortion Test Solution for RF Amplifiers

The R&S®SMW200A together with the R&S®FSW is a state of the art testing solution that significantly reduces the required hardware for testing power amplifiers with envelope tracking and/or digital pre-distortion.

Posted in: White Papers

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Fundamentals of Vector Network Analysis Primer

One of the most common measuring tasks in RF engineering involves analysis of circuits (networks). A network analyzer is an instrument that is designed to handle this job with great precision and efficiency. Circuits that can be analyzed using network analyzers range from simple devices such as filters and amplifiers to complex modules used in communications satellites

Posted in: White Papers

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