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. 15, 2019
Filed:
Nov. 05, 2015
Octio As, Bergen, NO;
Helge Brandsaeter, Hamresanden, NO;
John Even Lindgård, Harstad, NO;
Tatiana Matv̲eeva, Laksevåg, NO;
OCTIO AS, Bergen, NO;
Abstract
A system () for monitoring a subterranean structure comprises an array () with n acoustic sensors capable of detecting P-waves and/or S-waves from the subterranean structure and a central controller () for receiving a signal (X) from the sensors. The system further comprises a lookup table () comprising a pre-computed travel time curve () expressed as relative arrival times of a signal from a location (L) to each of the sensors (-n); a comparison unit for comparing the received signal (X) with the pre-computed travel time curve (), and means for raising an alarm if the received signal (X) matches the precomputed travel time curve (). Preferably, the alarm is raised if a computed semblance value () exceeds a predefined threshold. The system may monitor several locations (L) in parallel using a fraction of the computer resources and time required by prior art techniques.