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:
Jul. 28, 2026
Filed:
Jun. 30, 2022
China National Petroleum Corporation, Beijing, CN;
Bgp Inc., China National Petroleum Corporation, Hebei, CN;
China National Petroleum Corporation, Beijing, CN;
BGP Inc., China National Petroleum Corporation, Hebei, CN;
Abstract
A method for global phase IQ Demodulation of optical fiber DAS data includes: acquiring initial optical fiber DAS IQ data from DAS instrument; determining a corresponding direct phase value based on the initial optical fiber DAS IQ data, performing an interrogation pulse phase correction operation on the initial optical fiber DAS IQ data based on the direct phase value to obtain first processed data; performing a receiving point initial phase correction operation on the first processed data to obtain second processed data; performing an interrogation pulse linear phase correction operation on the second processed data to obtain third processed data; performing a receiving point linear phase correction operation on the third processed data to obtain fourth processed data; and performing phase unwrapping processing and de-near DC component processing on the fourth processed data to obtain global phase demodulated data.