Patents by Inventor David Unitt

David Unitt has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method of measuring time of flight of an ultrasound pulse
    Patent number: 10852168
    Abstract: Method and apparatus relating to ultrasound flow probes Measurement of time of flight of ultrasound pulses comprises: transmitting the pulses across a fluid flow; detecting a waveform (200) of the pulses, generating a cross-correlation between the waveform (200) and a tone (210) and identifying a plurality of peaks (220) in the cross-correlation; fitting a curve template (310) to the waveform at locations (300) corresponding to the peaks (220) and identifying the location (330) of the minimum error; performing a further cross-correlation (420) between the waveform (200) and the tone (210) over only a portion of the waveform (200) containing the minimum error location (330); and determining the temporal location corresponding to the maximum (430) of the further cross-correlation (430).
    Type: Grant
    Filed: June 29, 2015
    Date of Patent: December 1, 2020
    Assignee: PCME LIMITED
    Inventors: Neil D'Souza-Mathew, Robert Fryers, Roger Millington, David Unitt
  • Method Of Measuring Time Of Flight Of An Ultrasound Pulse
    Publication number: 20170138773
    Abstract: Method and apparatus relating to ultrasound flow probes Measurement of time of flight of ultrasound pulses comprises: transmitting the pulses across a fluid flow; detecting a waveform (200) of the pulses, generating a cross-correlation between the waveform (200) and a tone (210) and identifying a plurality of peaks (220) in the cross-correlation; fitting a curve template (310) to the waveform at locations (300) corresponding to the peaks (220) and identifying the location (330) of the minimum error; performing a further cross-correlation (420) between the waveform (200) and the tone (210) over only a portion of the waveform (200) containing the minimum error location (330); and determining the temporal location corresponding to the maximum (430) of the further cross-correlation (430).
    Type: Application
    Filed: June 29, 2015
    Publication date: May 18, 2017
    Inventors: Neil D'Souza-Matthew, Robert Fryers, Roger Millington, David Unitt