US Patent Issued to NTT on July 21 for "Vibration measuring instrument and vibration measurement method" (Japanese Inventors)

ALEXANDRIA, Va., July 21 -- United States Patent no. 12,687,425, issued on July 21, was assigned to NTT Inc. (Tokyo).

"Vibration measuring instrument and vibration measurement method" was invented by Yoshifumi Wakisaka (Musashino, Japan), Daisuke Iida (Musashino, Japan), Yusuke Koshikiya (Musashino, Japan), Hiroyuki Iida (Musashino, Japan) and Nazuki Honda (Musashino, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present disclosure relates to a vibration measuring instrument that repeatedly injects a plurality of light pulses with different optical frequencies into an optical fiber, and performs distributed acoustic sensing-phase (DAS-P). In the vibration measuring instrument, light pulses having ...