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Cumulative Timers for Microprocessors
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Date added: 08/01/2007 |
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It’s easy, and relatively reliable, to determine the amount of usage of a car or an airplane. Cars have odometers and airplanes have Hobbs Meters. Unfortunately, there is no equivalent device for determining the age of electronic equipment. Electronic equipment, especially high priced equipment, needs an odometer. I can think of two straightforward ways to implement such a device. |
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Nanocomposite Photoelectrochemical Cells
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Date added: 08/01/2007 |
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Photoelectrochemical cells convert solar energy to electricity through electrochemical reactions. A new solid-state photoelectrochemical cell configuration has been conceived that can provide substantially higher solar-to-electric conversion efficiencies than the state-of-the-art. |
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Ultracapacitor-Powered Cordless Drill
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Date added: 08/01/2007 |
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The Ultracapacitor Powered Cordless Drill is a unique cordless drill that uses ultracapacitors for energy storage rather than batteries. Ultracapacitors provide many advantages for cordless drills, including extremely long life, high reliability, high power capacity, fast recharge time, excellent low-temperature performance, and maintenance-free operation. |
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Flight Qualified Micro Sun Sensor
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Date added: 07/02/2007 |
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A prototype small, lightweight micro Sun sensor has been flight qualified as part of the attitude determination system of a spacecraft or for Mars surface operations. |
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High-Energy-Density, Low-Temperature Li/CFx Primary Cells
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Date added: 07/02/2007 |
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CF0.53 and CF0.65 powders were characterized using
x-ray diffraction, scanning electron microscopy, and x-ray energy dispersive spectroscopy. These materials were then implemented in a spray-deposited electrode form factor that used 1 mil aluminum foil as a supporting current collector and PVDF as a binder. Electrochemical tests showed that these materials were able to deliver specific
capacity values up to 5 times greater than commercial CF1.08 powder inserted into identically fabricated test cells. |
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Mars-Approach Navigation Using In Situ Orbiters
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Date added: 07/02/2007 |
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A continuing development of a navigation system is discussed that would enable a spacecraft to approach Mars on a trajectory to enable the spacecraft to land within 1 km of the specified location. |
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Photodetectors on Coronagraph Mask for Pointing Control
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Date added: 07/02/2007 |
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The concept proposed here envisions incorporating a detector array in the center of the mask itself directly on the mask so that much of the star light available at that focus can be utilized effectively for the purpose and a direct control of the mask position will be feasible through simple arithmetic operation of the signals from the various detector elements for feed back into the pointing control mechanism. |
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Increasing Linear Dynamic Range of a CMOS Image Sensor
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Date added: 07/02/2007 |
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A generic design and a corresponding operating sequence have been developed for increasing the linear response dynamic range of CMOS image sensor. |
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Mo/Ti Diffusion Bonding for Making Thermoelectric Devices
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Date added: 07/02/2007 |
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The following describes the details required to bond Molybdenum interconnect to thermoelectric legs, particularly for use at high temperatures (>700C). |
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Cylindrical Asymmetrical Capacitors for Use in Outer Space
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Date added: 07/01/2007 |
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NASA/MSFC has demonstrated repeatably through hundreds of hours of operation, the proof of principle
operation of the cylindrical asymmetrical capacitor in the laboratory operating at one atmosphere. Placing
a high voltage across the cylindrical asymmetrical capacitor configuration in air results in a force being
generated.Applications envisioned include
attitude control for satellites and other applications needing relatively low thrust, long lifetime space
propulsion. |
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