×

Diagnostics in process control and monitoring systems

  • US 8,032,234 B2
  • Filed: 05/16/2006
  • Issued: 10/04/2011
  • Est. Priority Date: 05/16/2006
  • Status: Active Grant
First Claim
Patent Images

1. A method of diagnosing a condition of a component of an industrial process control system used to process a process fluid;

  • coupling a process variable transmitter field device to process piping of the industrial process;

    the process piping carrying a process fluid;

    measuring a process variable of the process fluid with the process variable transmitter field device, the process variable comprises flow velocity;

    communicating the process variable to a control room over a process control loop;

    calculating histogram information in the process variable transmitter field device based upon the measured process variable and time information related to a duration of time the measured process variable has a value, the histogram information comprising cumulative time durations during which the measured process variable has had a value within a plurality of ranges of values;

    determining a total effective wear time of the component based upon the histogram information and a wear scaling factor applied to the histogram,wherein the total effective wear time is based upon an increasing and decreasing wear scaling factor which is non-monotonic with respect to increasing values of the measured process variable; and

    diagnosing, in the transmitter field device, a condition of the component of the industrial process based upon a comparison of the determined total effective wear time to a threshold wherein the diagnostic condition is indicative of wear.

View all claims
  • 2 Assignments
Timeline View
Assignment View
    ×
    ×