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:
Apr. 12, 2011
Filed:
Jul. 11, 2008
Dennis M King, Derby, GB;
David Clifton, Newmarket, GB;
Lionel Tarassenko, Oxford, GB;
Stephen P King, Derby, GB;
Paul Anuzis, Derby, GB;
Robert W Slater, Derby, GB;
Dennis M King, Derby, GB;
David Clifton, Newmarket, GB;
Lionel Tarassenko, Oxford, GB;
Stephen P King, Derby, GB;
Paul Anuzis, Derby, GB;
Robert W Slater, Derby, GB;
Rolls-Royce, PLC, London, GB;
Oxford Biosignals Limited, Abingdon, GB;
Abstract
A method and apparatus for detecting an abnormality in e.g. in operating characteristics or function of a machine, apparatus or system, the method including providing a data sample set comprising n values of a measured physical parameter associated with the apparatus or system generated by repeating a measurement of the physical parameter n times. An extremal measured parameter value is selected from amongst the data sample set, determining a probability of observing the selected parameter value (e.g. of observing a value not exceeding the selected parameter value) by applying the selected parameter value to an extreme value probability distribution function having a location parameter and a scale parameter. The value of the location parameter and the value of the scale parameter are each constructed using an integer value m (e.g. notionally representing the size of a sub-sample data set comprising m of said measured parameter values) in which m is less than n (i.e. m<n). A conditional indication is given that the selected parameter value is abnormal according to the value of the probability.