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Monitoring System Helps Astronauts Sleep on Space Station

VivoMetrics® LifeShirt System ambulatory monitoring system VivoMetrics Ventura, CA 805-667-2225 www.vivometrics.com

Posted in: Application Briefs

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Camera System Inspects Shuttle and Space Station

Laser Camera System (LCS) Neptec Design Group Houston, TX 281-280-8555 www.neptec.com

Posted in: Application Briefs

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Interferometer Enables Precision Metrology on James Webb Space Telescope

SpeckleCam Electronic Speckle Pattern Interferometer (ESPI) 4D Technology Tucson, AZ 520-294-5600 www.4dtechnology.com

Posted in: Application Briefs

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Mars Exploration Rovers Use Amplifier System to Transmit Information

580412 SE 20 Power Amplifier Package StratEdge Corp. San Diego, CA 858-569-5000 www.stratedge.com

Posted in: Application Briefs

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Position Sensors Help Cassini Mission Provide Clues to Planetary Formation

Potentiometers Novotechnik U.S. Southborough, MA 508-485-2244 www.novotechnik.com

Posted in: Application Briefs

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Flexible Cryogenic Temperature and Liquid-Level Probes

These probes can be readily customized. Lightweight, flexible probes have been developed for measuring temperatures at multiple locations in tanks that contain possibly pressurized cryogenic fluids. If the fluid in a given tank is subcritical (that is, if it consists of a liquid and its vapor), then in one of two modes of operation, the temperature measurements made by a probe of this type can be used to deduce the approximate level of the liquid. The temperature sensors are silicon diodes located at intervals along a probe. If the probe is to be used to measure a temperature gradient along a given axis in the tank, then the probe must be mounted along that axis. In the temperature-measurement mode, a constant small electric current is applied to each diode and the voltage across the diode — a known function of the current and temperature — is measured as an indication of its temperature. For the purpose of this measurement, “small electric current” signifies a current that is not large enough to cause a significant increase in the measured temperature. More specifically, the probe design calls for a current of 10 µA, which, in the cryogenic temperature range of interest, generates heat at a rate of only about 0.01 mW per diode.

Posted in: Test & Measurement, Briefs

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Elastic-Tether Suits for Artificial Gravity and Exercise

Body suits harnessed to systems of elastic tethers have been proposed as means of approximating the effects of normal Earth gravitation on crewmembers of spacecraft in flight to help preserve the crewmembers’ physical fitness. The suits could also be used on Earth to increase effective gravitational loads for purposes of athletic training. The suit according to the proposal would include numerous small tetherattachment fixtures distributed over its outer surface so as to distribute the artificial gravitational force as nearly evenly as possible over the wearer’s body. Elastic tethers would be connected between these fixtures and a single attachment fixture on a main elastic tether that would be anchored to a fixture on or under a floor. This fixture might include multiple pulleys to make the effective length of the main tether great enough that normal motions of the wearer cause no more than acceptably small variations in the total artificial gravitational force. Among the problems in designing the suit would be equalizing the load in the shoulder area and keeping tethers out of the way below the knees to prevent tripping. The solution would likely include running tethers through rings on the sides. Body suits with a weight or water ballast system are also proposed for very slight spinning space-station scenarios, in which cases the proposed body suits will easily be able to provide the equivalency of a 1-G or even greater load.

Posted in: Medical, Briefs

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