×

System for surveillance of spectral signals

  • US 6,553,334 B2
  • Filed: 05/16/2001
  • Issued: 04/22/2003
  • Est. Priority Date: 11/14/1997
  • Status: Expired due to Term
First Claim
Patent Images

1. A method of testing at least one of a process and/or a data set and/or a data source for determining a particular condition thereof, comprising the steps of:

  • collecting data from at least a first source of data and a second source of data to redundantly detect at least one variable of the process and/or the data set and/or the data source to provide a first signal from said at least first source of data and a second signal from said at least a second source of data, each of said first and second signals being characteristic of the at least one variable;

    providing frequency domain transformation data for each of said first and second signals at a given time;

    obtaining a frequency domain difference function characteristic of the difference pairwise for the given time between said frequency domain transformed first signal data and said frequency domain transformed second signal data;

    operating on the frequency domain difference function using computer means for applying a statistical analysis technique to determine a combined statistical frequency spectrum data set for at least one of the process and/or the data source and/or the data set;

    repeating for a new incremental time the steps of providing frequency domain transformation data, obtaining a frequency domain difference function and operating on the frequency domain difference function by applying the statistical analysis technique until generation of a three-dimensional surface characteristic of a combined frequency and time domain function for a particular condition of the process and/or the data set and/or the data source; and

    correlating the characteristic three dimensional surface with previously stored reference state information indicative of a particular alarm state.

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