Sensors/Data Acquisition

Cryogenic Propellant Feed System Analytical Tool

This parametric tool rapidly predicts heat leak into cryogenic propellant distribution lines. Lyndon B. Johnson Space Center, Houston, Texas The Propellant Feed System Analytical Tool (PFSAT) predicts heat leak based on insulation type, installation technique, line supports, penetrations, and instrumentation. It also determines the optimum orifice diameter for an optional thermodynamic vent system (TVS) to counteract heat leak into the feed line, and ensures that the temperature constraints at the end of the feed line are met. PFSAT was developed primarily using Fortran 90 code because of its computational speed and its ability to access directly real fluid property subroutines in the Reference Fluid Thermodynamic and Transport Prop erties (REFPROP) database developed by NIST.

Posted in: Briefs, Data Acquisition

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High-Performance MEMS IMU Solutions for Demanding Applications

For MEMS IMU applications where the inertial profile is complex and highly dynamic, there are a number of attributes to consider when evaluating capabilities. Evaluating these attributes early in the design cycle provides an advantage over chasing open-ended deliverables, like "as accurate as possible."

Posted in: White Papers, Electronics, Data Acquisition, Sensors

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GSPS DACs Enable Ultra-Wide Bandwidth Applications

To meet the increasing capacity demand of mobile customers, the emerging E-band market requires wider bandwidth capabilities compared to traditional microwave backhaul wireless architectures. Due to increased capacity, 2-GHz E-band systems will be needed in the near future. This white paper covers the demands of current E-band point-to-point systems, and how Analog Devices’ high-speed digital-to-analog converters (DACs) provide the necessary bandwidth and sampling frequencies to support them.

Posted in: White Papers, Electronics, Data Acquisition, Sensors

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Executive Perspectives: Data Acquisition & Sensing

GRANT MALOY SMITH President and CEO Dewetron, Inc. Wakefield, RI www.dewamerica.com In 40 years, data acquisition products have evolved from paper-based chart recorders and analog tape machines, to computer-based instruments. As a result, the relatively slow pace of improvements in performance that typified data recorders for nearly a century is now swept along on the fast-moving current of computer technology advances.

Posted in: Articles, Data Acquisition, Sensors

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Full RF Signal Chains from 0 Hz to 110 GHz

Analog Devices (ADI) has expanded its RF capabilities in the full signal chain, including companion products, in the full bandwidth from 0 Hz to 110 GHz.This white paper provides examples of the wider frequency spectrum covered by ADI, and explains that true DC is important. Off signal chain performance is also critical, and this paper shows how low-noise, high-stability control and power components are important to overall RF signal performance.

Posted in: White Papers, Electronics, Data Acquisition, Sensors

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'Proximity Hat' Reveals Surroundings in Real Time

Karlsruhe Institute of Technology (KIT) researchers have developed a "Proximity Hat" that uses head pressure to inform users about their surroundings. The ultrasonic sensors, batteries, and pressure pads can be worn like a hat or headband.

Posted in: News, Detectors, Sensors, Transducers

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Advanced Spacecraft Navigation and Timing Using Celestial Gamma-Ray Sources

This technology can decrease the overall operations cost of exploration missions by increasing the onboard navigation and guidance capabilities. Goddard Space Flight Center, Greenbelt, Maryland The Advanced Spacecraft Navigation and Timing using Celestial Gamma-Ray Sources concept is a novel relative navigation technology for deep-space exploration using measurements of celestial gamma-ray sources. This new Gamma-ray source Localization-Induced Navigation and Timing (GLINT) method incorporates existing designs of autonomous navigation technologies and merges these with the developing science of high-energy sensor components. This new enabling technology for interplanetary self-navigation could provide important mission enhancements to planned operational and discovery missions. It has the potential to decrease the overall operations cost of exploration missions by increasing the onboard navigation and guidance capabilities, and reducing the risk of uncertainty by providing these vehicles the freedom to explore those areas that are most interesting.

Posted in: Briefs, TSP, Sensors

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