Patents by Inventor Wah Hoon Siew

Wah Hoon Siew 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).

  • Detecting Partial Discharge in High Voltage Cables
    Publication number: 20090012727
    Abstract: A method for detecting partial discharge events comprising analysing an output from the cable using one or more substantially shift invariant wavelet transforms, and using the analysed signal to identify one or more peaks associated with a partial discharge. Preferably, the shift invariant transform is a stationary wavelet transform (SWT).
    Type: Application
    Filed: March 6, 2006
    Publication date: January 8, 2009
    Inventors: Wah Hoon Siew, John James Soraghan, Ming Hui Foo
  • Automatic fault location in cabling systems
    Patent number: 6385561
    Abstract: A method and apparatus (12-20, 32) for automatically locating faults in a network of signal carriers (cables) utilises an interrogation waveform which is pulse-like in form and receives composite reflected signals from the carriers which are a time distributed collection of individual reflections. These are sampled and compared using the function of an adaptive filter (52) to minimise the difference signal. The difference signals are analysed to determine significant points of departure which identify the fault location which is then represented as a distance value.
    Type: Grant
    Filed: May 13, 1999
    Date of Patent: May 7, 2002
    Assignee: University of Strathclyde
    Inventors: John James Soraghan, Wah Hoon Siew