A device and a method for determining the flow velocity of a fluid in a hollow body, including at least one disturbance device disposed in the hollow body and at least one sensor for identifying disturbances that are induced in the flow by the disturbance device, which is disposed at a certain distance downstream in the direction of flow from the disturbance device, wherein the disturbance device includes means for generating changeable disturbances in the fluid flow.

A configuration tool is for a vortex flowmeter having a flowtube, a bluff body positioned in the flowtube for shedding vortices in the fluid, and a pressure sensor configured to obtain a signal indicative of a time-varying fluid pressure having an oscillation associated with the vortices. The configuration tool includes a processor that determines a type of fluid flowing through the flowtube based on the amplitude of the oscillation. The processor sets a fluid-type setting of the vortex meter to match the determined type of fluid. An alarming system for a control system including such a flowmeter includes a processor that assesses a density of a fluid flowing through the flowtube based on the amplitude and compares the assessed density to a fluid density configuration setting. The processor activates an alarm if the difference between the assessed density and the fluid density configuration setting exceeds a threshold.

In this vortex flowmeter provided with a vortex generator and a flow rate measuring unit the flow rate measurement unit includes a piezoelectric element and a piezoelectric element case. The piezoelectric element case includes: a fitted part fitted in the body case; a pressure receiving part protruding out from a distal end face of the fitted part and placed in a body passage; a hollow portion formed along the axial direction of the piezoelectric element case in the fitted part to separate the fitted part and the pressure receiving part; and a slit formed inside of the pressure receiving part and configured to accommodate the piezoelectric element.

A segmented Kalman filter based anti-transient-impact-vibration-interference signal processing method and system for a vortex flowmeter with a microcontroller as a core are provided, which relate to a flow rate measurement field. The method includes: (1) seeking for data segments containing transient impact vibration interferences, (2) configuring a Kalman filter, (3) implementing Kalman filtering in segments, (4) analyzing frequency domain amplitude spectrum. A vortex flow signal is predicted and estimated by the Kalman filter to achieve an objective of reducing powers and proportions of transient impact vibration interferences. Even when multiple transient impact interference components exist, and powers of these interferences are larger than the power of the vortex flow signal, the interferences can still be eliminated to correctly extract a frequency of the vortex flow signal, as well as ensuring measurement accuracy of the vortex flowmeter under complicated working process.

An averaging pitot tube probe assembly for use in sensing a parameter of a fluid flow in a process vessel includes an averaging pitot tube probe extending through the process vessel. The probe includes a first end extending through a first opening in the process vessel, and a second end extending through a second opening in the process vessel. A fixed mount secures the first end in a fixed position relative to the process vessel. A tensioning mount includes a tensioner that is attached to the second end of the probe and is configured to adjust a tension in the probe, and thereby adjust a resonant frequency of the probe.

The invention provides an apparatus and method for measuring fluid flow rates. The apparatus comprises a meter body comprising a throughbore with a fluid flow path and a flow displacement member. The apparatus also provides a sleeve slidably mounted within the fluid flow path. The sleeve is configured to be movable between at least two axial positions within the fluid flow path to select a predetermined flow rate measurement range for the flow measurement apparatus.

A sensor assembly has a deformation body having two oppositely lying surfaces and an outer edge segment as well as a sensor blade extending from the surface to a distal end and having a left side, first lateral surface and a right side, second lateral surface. An overload protection apparatus protects the deformation body against plastic deformation and has a support stirrup led with lateral separation around the sensor blade and a first stop and a second stop located on opposite sides of the sensor blade. The stops are so arranged that an intermediate space formed therebetween receives only a portion of the sensor blade. The deformation body and the sensor blade are excitable to oscillate about a shared static resting position and to be moved in such a manner that the sensor blade executes pendulum-like movements elastically deforming the deformation body.

The invention relates to: a measuring tube (10) for guiding a fluid for a flow meter device (1) according to the vortex measuring principle, wherein the measuring tube has an inflow-side opening in an inflow-side end face and an outflow-side opening in an outflow-side end face, between which the measuring tube extends in the axial direction; a bluff body (15) which is arranged in the measuring tube (10), wherein the bluff body functions to bring about a Krmn vortex street with a flow-rate-dependent vortex frequency when a fluid flows through the measuring tube; and at least one vortex detector (16) for detecting vortexes of the vortex street and for providing vortex-dependent signals; characterized in that the measuring tube (10) has a control valve (14), between the vortex detector (16) and the outflow-side end face and axially spaced apart from the vortex detector, which annularly constricts the flow cross-section of the measuring tube (10).

Apparatus and associated methods relate to determining altitude of an aircraft during flight based on properties of vortex shedding. A vortex-shedding projection is projected into the airstream adjacent to the exterior surface of the aircraft so as to cause vortex-shedding turbulence of the airstream. One or more downstream sound-pressure detectors, which are attached to the exterior surface of the aircraft downstream from the vortex-shedding projection, detect(s) a vortex-shedding frequency f of the vortex-shedding turbulence caused by the vortex-shedding projection. A processor determines the altitude of the aircraft based, at least in part, on the vortex-shedding frequency f of the vortex-shedding turbulence as detected by the one or more downstream sound-pressure detectors.

A configuration tool is for a vortex flowmeter having a flowtube, a bluff body positioned in the flowtube for shedding vortices in the fluid, and a pressure sensor configured to obtain a signal indicative of a time-varying fluid pressure having an oscillation associated with the vortices. The configuration tool includes a processor that determines a type of fluid flowing through the flowtube based on the amplitude of the oscillation. The processor sets a fluid-type setting of the vortex meter to match the determined type of fluid. An alarming system for a control system including such a flowmeter includes a processor that assesses a density of a fluid flowing through the flowtube based on the amplitude and compares the assessed density to a fluid density configuration setting. The processor activates an alarm if the difference between the assessed density and the fluid density configuration setting exceeds a threshold.