The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 27, 1998
Filed:
Aug. 29, 1996
Steven A Lombardi, Waukesha, WI (US);
Allen Bradley Company, LLC, Milwaukee, WI (US);
Abstract
A method and apparatus are provided for approximation of integral and RMS values for waveforms of uncertain or unknown period. The technique employed processes values of the waveform sampled at fixed sampling intervals, monitors the actual period of the waveform, and calculates the number of fixed sampling intervals in the period. The sampled data is then used as a basis for mapping the waveform onto a desired number of sampling points. Interpolation techniques are used to assign values to desired sampling points lying between fixed interval sampled points. The desired number of sample points is selected to permit use of Simpson's rule for approximating the integral value (an odd number of points for application of Simpson's 1/3 rule, and a number equal to a multiple of 3 plus 1 for application of Simpson's 3/8 rule). Once the desired sampling points are determined, Simpson's rule is applied to calculate the integral, and the RMS value may be determined based on this integral value.