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:
Jun. 11, 1991
Filed:
Jun. 02, 1989
Applicant:
Inventor:
Alan J Pitts, Comanche, OK (US);
Assignee:
Halliburton Company, Duncan, OK (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G01N / ; G06G / ;
U.S. Cl.
CPC ...
364558 ; 364581 ; 364572 ; 250260 ; 25036301 ; 73151 ;
Abstract
A filter for use with a signal which varies about a mean such as in a radioactive densometer, is provided and includes a microprocessor and timing clock for sampling the random variable over a specific time interval. The microprocessor utilizes a weighting factor which is used to determine a percentage of an average frequency of an initial sample of random signals or mean. Further, the microprocessor determines a percentage of an average frequency of a subsequent sample of random signals. Once determined, the two percentages are added together yielding a new frequency which the microprocessor then uses to decide if an actual change in state has occurred.