Patents by Inventor Graham D. Wall

Graham D. Wall 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 for an entropy filter echo processing in time-of-flight or level measurement systems
    Patent number: 6935177
    Abstract: A method for processing echoes in a time-of-flight ranging system or level measurement system. The method comprises applying an entropy filter to the echo profile. The entropy filter comprises determining the information content in the echo profile. The entropy filter determines the occurrences of a pattern in the bit stream representing magnitudes in the echo profile. Repeated occurrences of the pattern are used to characterize the echo signal as having low randomness (i.e. higher information content) indicative of a potential echo pulse or as having high randomness (i.e. lower information content) indicative of noise.
    Type: Grant
    Filed: September 29, 2003
    Date of Patent: August 30, 2005
    Assignee: Siemens Milltronics Process Instruments Inc.
    Inventor: Graham D. Wall