Method and device for non intrusively measuring the pressure fluctuations of a fluid within a conduit

摘要

The duct (1) is surrounded by a ring (20) of uniform thickness with a rigidity at least equal to that of the duct, with a slot (27) along a generator line. A force or displacement sensor (10) with a wide range and substantially equal rigidity is connected across the slot. The ring is tightened around the duct to ensure permanent contact. The sensor is zeroed to compensate for static stresses due to the tightening and to the static pressure within the duct. The variations of force or length detected by the sensor are measured and used as a basis for deduction of the internal pressure fluctuations.