Verfahren und Vorrichtung zur Verteilten Akustischen Messung

Details

Veröffentlichungs-Nr.

EP4446711

Aktenzeichen

EP24169414

Anmeldetag

10. April 2024

Veröffentlichung

16. Oktober 2024

Rechtsraum

EP

IPC

G01H9/00

Abstract

There is provided a method and system of frequency dithered distributed acoustic sensing (FD-DAS) using group data signal processing, where the continuous wave (CW) coherent laser's optical frequency or optical phase for the FD-DAS interrogator may be set in evenly or randomly distributed manner for different data groups but they are kept as constant or with negligibly variation within each data group. Such FD-DAS may be used to improve acoustic or vibration signal measurement reliability, to allow to use a low-cost single-frequency laser such as a DFB laser, and/or to suppress polarization fading effect.

Anmelder

Firma

EXFO Inc.

Land

🇨🇦 Kanada

Fachgebiete