Patents Assigned to The United States of America as represented by the Adminstrator of the National Aeronautics and Space Adminstration
  • Patent number: 10422706
    Abstract: The present invention is a temperature sensor for cryogenic systems using a fiber optic interrogation system that is capable of a large number of temperature readings across the cryogenic environment at high resolutions. The invention also includes a method of using such a system to measure temperatures in a cryogenic environment and a method of making such a system.
    Type: Grant
    Filed: June 28, 2018
    Date of Patent: September 24, 2019
    Assignee: United States of America as Represented by the Adminstrator of the National Aeronautics and Space Adminstration
    Inventors: Allen R. Parker, Jr., Anthony Piazza, Hon Man Chan, Ryan M Warner
  • Patent number: 8935107
    Abstract: A compact shock sensing system and method that employ a light sheet generator that can be used either as a solo aerodynamic shock detector or in a combination with a scanning mode shock sensor is disclosed. This shock sensing system and method can be used to detect and track unstable and travelling shocks in high speed aerodynamic flows, such as those found in supersonic inlets.
    Type: Grant
    Filed: February 18, 2011
    Date of Patent: January 13, 2015
    Assignee: The United States of America as Represented by the Adminstrator of National Aeronautics and Space Adminstration
    Inventors: Grigory Adamovsky, Roger P Tokars
  • Patent number: 8909491
    Abstract: Provided is a method for measuring multi-point interferometric angle changes beginning with an interferometric device capable of measuring at least one main point and at least one reference point. The method includes recording interferometric intensity changes on two or more spots using the main point and the reference point, and determining a sequence having a plurality of peak, local maximas and a plurality of valley, local minimas. The method includes sampling a first, partial sequence and comparing it to a neighboring, partial sequence using a perturbation analysis and additional calculation(s) to compile all phase angle changes for all measured points. Also provided is a computer implemented method to enable nanometer resolution sensitivity in a noisy signal and for characterization of a material in an interferometric device.
    Type: Grant
    Filed: March 5, 2012
    Date of Patent: December 9, 2014
    Assignee: The United States of America as represented by the Adminstrator of the National Aeronautics and Space Adminstration
    Inventors: Yeonjoon Park, Sang Hyouk Choi
  • Patent number: 8875580
    Abstract: A method and apparatus for evaluating and/or quantifying damage to wire strands of a wire caused during installation of a crimped wire connector, involves launching an ultrasonic wave having known characteristics into a wire at a location that is either the crimp or is adjacent the crimped wire connector, and detecting changes in the characteristics (e.g., amplitude and/or phase shift) of the wave as it is propagates along a length of the wire.
    Type: Grant
    Filed: December 13, 2011
    Date of Patent: November 4, 2014
    Assignee: The United States of America as represented by the Adminstrator of the National Aeronautics and Space Adminstration
    Inventors: William T. Yost, Karl Elliott Cramer, Daniel F. Perey
  • Patent number: 6463785
    Abstract: Method and apparatus are provided for a non-invasive bubble measuring instrument operable for detecting, distinguishing, and counting gaseous embolisms such as bubbles over a selectable range of bubble sizes of interest. A selected measurement volume in which bubbles may be detected is insonified by two distinct frequencies from a pump transducer and an image transducer, respectively. The image transducer frequency is much higher than the pump transducer frequency. The relatively low-frequency pump signal is used to excite bubbles to resonate at a frequency related to their diameter. The image transducer is operated in a pulse-echo mode at a controllable repetition rate that transmits bursts of high-frequency ultrasonic signal to the measurement volume in which bubbles may be detected and then receives the echo. From the echo or received signal, a beat signal related to the repetition rate may be extracted and used to indicate the presence or absence of a resonant bubble.
    Type: Grant
    Filed: March 26, 2002
    Date of Patent: October 15, 2002
    Assignee: The United States of America as represented by the Adminstrator of the National Aeronautics and Space Adminstration
    Inventors: Robert Kline-Schoder, Patrick J. Magari
  • Patent number: 6265112
    Abstract: The general purpose of the invention is to develop a high specific energy nickel electrode for a nickel based battery system. The invention discloses a method of producing a lightweight nickel electrode which can be cycled to deep depths of discharge (i.e., 40% or greater of electrode capacity). These deep depths of discharge can be accomplished by depositing the required amount of nickel hydroxide active material into a lightweight nickel fiber substrate.
    Type: Grant
    Filed: October 27, 1994
    Date of Patent: July 24, 2001
    Assignee: The United States of America as represented by the Adminstrator of the National Aeronautics and Space Adminstration
    Inventor: Doris L. Britton
  • Patent number: 4624561
    Abstract: Method and apparatus unaffected by vibrational environments for obtaining measurements using Raman Doppler Velocimetry. Two laser beams, a pump beam 18 and a probe beam 22, are focused by a lens 21 to a point 25 in a flow 11. A lens 26 collimates the two beams. A beam splitter 27 dumps beam 18 and beam 22 is reflected by a corner cube 28 back to lens 26. Lens 26 then focuses the beam back to point 25. The reflected beam 22 and the backward and forward scattering at point 25 are detected by a detector 30 and processed by a boxcar averager 31. The lens 26 and corner cube 28 combination, called a retrometer 29, ensure that the measurements are unaffected by vibrations.
    Type: Grant
    Filed: April 25, 1985
    Date of Patent: November 25, 1986
    Assignee: The United States of America as represented by the Adminstrator of the National Aeronautics and Space Adminstration
    Inventor: Reginald J. Exton