US Patent Issued to China National Petroleum, BGP Inc. China National Petroleum on July 28 for "Method and apparatus for global phase in-phase/quadrature demodulation of optical fiber DAS data" (Chinese Inventors)

ALEXANDRIA, Va., July 28 -- United States Patent no. 12,693,142, issued on July 28, was assigned to China National Petroleum Corp. (Beijing) and BGP Inc. China National Petroleum Corp. (Hebei, China).

"Method and apparatus for global phase in-phase/quadrature demodulation of optical fiber DAS data" was invented by Yanpeng Li (Hebei, China), Shaohua Zhang (Hebei, China) and Zhidong Cai (Hebei, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "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 pu...