×

Probe mapping diagnostic methods

  • US 6,559,657 B1
  • Filed: 01/12/1999
  • Issued: 05/06/2003
  • Est. Priority Date: 01/13/1999
  • Status: Expired due to Term
First Claim
Patent Images

1. A method for processing a time domain reflectometry (TDR) signal having a plurality of reflection pulses to generate a valid output result corresponding to a process variable for a material in a vessel, said method comprising the steps of:

  • determining a reference signal along a probe in said vessel;

    establishing a reference end of probe location using said reference signal;

    periodically detecting a TDR signal along said probe;

    determining a detected end of probe location on said TDR signal;

    attempting to detect a process variable reflection on said TDR signal;

    determining a system status based upon said reference end of probe location, said detected end of probe location and said process variable reflection; and

    computing said output result when said system status is functional.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×