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Leakage location methods

  • US 9,021,539 B2
  • Filed: 12/02/2011
  • Issued: 04/28/2015
  • Est. Priority Date: 08/07/2006
  • Status: Active Grant
First Claim
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1. A method for repairing signal leakage from a CATV network, the method comprising traversing an area served by the CATV network, measuring leakage signal strengths, identifying latitude and longitude coordinates where the leakage signal strengths are measured, storing the measured leakage signal strengths and latitude and longitude coordinates where the leakage signal strengths are measured, transferring the measured leakage signal strengths and corresponding latitude and longitude coordinates to a computer, calculating leak latitude and longitude coordinates and signal strengths on the computer from the transferred leakage signal strengths and latitude and longitude coordinates, transferring the calculated leak locations to technicians'"'"' vehicles, converting the calculated leak locations in the technicians'"'"' vehicles to turn-by-turn directions to the calculated leak locations, following the turn-by-turn directions to the leaks, and repairing the leakswherein measuring leakage signal strengths, identifying latitude and longitude coordinates where the leakage signal strengths are measured, storing the measured leakage signal strengths and latitude and longitude coordinates where the leakage signal strengths are measured, and transferring the measured leakage signal strengths and corresponding latitude and longitude coordinates to a computer comprises making leakage measurements, making latitude and longitude measurements, associating each leakage measurement with a respective latitude and longitude measurement, creating a data base of associated leakage measurement and respective latitude and longitude measurement, selecting from the data base a number of leakage measurements, multiplying the selected leakage measurements times a first locus of points on which a leakage signal associated with that respective leakage measurement may be assumed to reside to develop a number of relationships among leakage measurement, latitude and longitude;

  • solving a first pair of these relationships among leakage measurement, latitude and longitude for a second locus of points common to the first pair;

    solving a second pair of these relationships among leakage measurement, latitude and longitude for a third locus of points common to the second pair, projecting the second and third loci onto a common surface, and determining the intersection of the second and third loci on the common surface.

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