A vortex flowmeter includes a housing having an interior cavity, a vortex shedder supported by the housing and extending into the interior cavity, an ultrasonic sensor, a bending moment sensor and a controller. The ultrasonic sensor is configured to produce an ultrasonic flow rate output that is indicative of the flow rate of a fluid flow through the interior cavity. The bending moment sensor is configured to produce a bending moment flow rate output that is indicative of the flow rate of the fluid flow through the interior cavity. The controller is configured to generate a flow rate measurement that is indicative of the flow rate based on the ultrasonic flow rate output and/or the bending moment flow rate output.

A combined sewer/enclosure overflow (CSO) sensor system is described for accurate detection and measurement of overflow events. From the combined data, trending information can determine if there is debris accumulation. Rain masks can be used in the trending data to measure overall health. External sensors in combination with the CSO sensors provide predictive information and additional levels of information/data accuracy. The sensor system automatically and remotely monitors CSO locations and provides real-time data regarding start times, stop times, duration, and flow volumes of overflows that occur in these structures and provide regulatory and public notification of these events.

A combined sewer/enclosure overflow (CSO) sensor system is described for accurate detection and measurement of overflow events. From the combined data, trending information can determine if there is debris accumulation. Rain masks can be used in the trending data to measure overall health. External sensors in combination with the CSO sensors provide predictive information and additional levels of information/data accuracy. The sensor system automatically and remotely monitors CSO locations and provides real-time data regarding start times, stop times, duration, and flow volumes of overflows that occur in these structures and provide regulatory and public notification of these events.

A measurement apparatus (10) and to a method provide for the determination of a flow rate (v) and/or of a throughflow (Q) of a fluid (14) flowing in a conduit (12). At least one first ultrasonic transducer (18) and one second ultrasonic transducer (20) permit a flow rate determination via the time of flight of an ultrasound signal. To further improve the determination of a flow rate of a fluid using ultrasonic transducers, in particular at very high flow rates, and to enable the measurement of very high flow rates, a noise-measuring ultrasonic transducer (18, 20; 24) is provided that measures the noise generated in on the flowing past of the fluid (14) in the ultrasonic transducer, and a control and evaluation device (32) is configured to determine the flow rate (v) using the noise measurements.

A system for monitoring and controlling flow rate of a fluid through a valve is disclosed. The system includes a flow rate sensor to measure the flow rate of the fluid through the valve, and a controller. The controller is configured to receive the measured flow rate from the flow rate sensor, and determine if the measured flow rate is equal to a predetermined flow rate value. The controller is further configured to, in response to a determination that the measured flow rate is equal to the predetermined flow rate value, determine a minimum valve position threshold (x.sub.min). Additionally, the controller is configured to determine a minimum flow rate threshold (y.sub.min) corresponding to x.sub.min, and configured to generate a PWM signal and calculate a corrected flow rate (.sub.f) using the PWM signal. The controller controls a valve operation using .sub.f. The PWM signal switches between zero and y.sub.min.

A multiphase flowmeter for detection of fluid flow by monitoring of vortex frequency or perturbation time of flight. The flowmeter includes a bluff body to facilitate formation of vortices during a consistent phase of a flowing fluid. Thus, monitoring frequency of the vortices may be employed to ascertain flowrate. Further, the bluff body may also facilitate formation of perturbations during transitioning phase of the fluid and include perturbation sensors at multiple known locations along the flow-path. Thus, analysis of perturbation detection times at the different locations may be used to ascertain flowrate even in the absence of vortices.

A wind noise analyzer includes: an unsteady computational fluid dynamics calculation unit configured to execute an unsteady computational fluid dynamics simulation involving moving a structure model modeled on a structure, and calculate, for each of spatial nodes, an average flow velocity and an average vorticity over a predetermined time in a flow field inside the predetermined region, and then calculate, for each of the spatial nodes, a value based on an amplitude of a turbulent flow velocity inside the predetermined region, in an angular frequency band of interest; and a pressure source density calculation unit configured to calculate, based on the average flow velocity, the average vorticity, and the value based on the amplitude of the turbulent flow velocity, a pressure source density.

A system for monitoring and controlling flow rate of a fluid through a valve is disclosed. The system includes a flow rate sensor to measure the flow rate of the fluid through the valve, and a controller. The controller is configured to receive the measured flow rate from the flow rate sensor, and determine if the measured flow rate is equal to a predetermined flow rate value. The controller is further configured to, in response to a determination that the measured flow rate is equal to the predetermined flow rate value, determine a minimum valve position threshold (x.sub.min). Additionally, the controller is configured to determine a minimum flow rate threshold (y.sub.min) corresponding to x.sub.min, and configured to generate a PWM signal and calculate a corrected flow rate (.sub.f) using the PWM signal. The controller controls a valve operation using .sub.f. The PWM signal switches between zero and y.sub.min.

Processing electronics provide flow data acquisition and telemetry for multiphase flow tomographic ultrasonic transceiver arrays. The processing electronics forms pulse drive signals to cause a tomographic pulse sequence to be emitted. Selected ones of an array of the ultrasonic transceivers emit ultrasonic energy in the tomographic pulse sequence for travel through the multiphase flow. The selected transmitting transceiver is isolated while transmitting it, and the remaining the transceivers are enabled to receive measures of the emitted pulse is after travel through the multiphase flow.

The invention relates to a flow measurement apparatus for measuring a parameter, in particular for determining a flow rate, of a flow formed from a fluid, wherein the flow measurement apparatus comprises a flow chamber having an inflow section and an outflow section and a measurement section arranged between the inflow section and the outflow section, wherein the measurement section defines a transport direction for the fluid, wherein at least one ultrasonic device for transmitting and/or receiving ultrasonic waves is arranged in the measurement section. The flow measurement apparatus is characterized in that a flow deflection device is provided that is configured to deflect the flow such that the flow extends at least regionally obliquely to the transport direction in the measurement section, and in that the ultrasonic device is configured to transmit the ultrasonic waves through the fluid in one or more sound paths that are at least substantially perpendicular to the transport direction and/or to receive the ultrasonic waves from the fluid from one or more sound paths that are at least substantially perpendicular to the transport direction.