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:
Feb. 24, 2009
Filed:
Jul. 26, 2005
Mikhail Avergun, San Diego, CA (US);
Elliott S. Middleton, Jr., Mission Viejo, CA (US);
Hendrik Johannes Victor, Rancho Santa Margarita, CA (US);
Mikhail Avergun, San Diego, CA (US);
Elliott S. Middleton, Jr., Mission Viejo, CA (US);
Hendrik Johannes Victor, Rancho Santa Margarita, CA (US);
Invensys Systems, Inc., Foxboro, MA (US);
Abstract
A control system database server is disclosed that includes a data compression facility that implements a compression test sequence on streams of time stamped data points rendered by components of a control system. A deadband/time override is incorporated into the compression test sequence to ensure that a previously received data point, within the stream of received data points, is saved within a designated time period even if the compression test sequence would have determined that the data point be discarded. The series of compressed/tabled data points, corresponding to the received steams of data points, are thereafter provided by the historian to requesting client applications that, by way of example, retrieve the compressed, time stamped data point streams for the purpose of constructing and displaying trend graphs.