SENSOR FOR DETECTING PRESSURE WAVES IN A FLUID, PROVIDED WITH STATIC PRESSURE COMPENSATION

摘要

A pressure sensor device comprises: - a chamber (2) filled with a pressure transfer medium (3), the chamber having at least one window (4) that at least partly transfers pressure waves in a fluid; - an optical fiber (10) extending longitudinally through the chamber (2), the optical fiber (10) comprising a Fiber Bragg Grating (18) and two mounting spots (11, 12) at opposite sides of the Fiber Bragg Grating (18); - a frame (50) having a first frame end (51) and a longitudinally opposite second frame end (52); - a pressure response assembly (70) connected in parallel to a fiber portion (13) between said two mounting spots (11, 12), the pressure response assembly comprising a series arrangement of a pressure response means (28) and a movement damper (30); - a resilient member (40) connected in series to said fiber portion and said frame (50).