Abstract: An ultrasonic flowmeter that measures flow velocity of a measured fluid by propagating ultrasonic waves through a measuring flow path with a rectangular cross section through which the measured fluid flows and the measured fluid that flows through the measuring flow path. The measuring flow path is provided with partition plates so that they are in parallel with the flow direction of the measured fluid. Simultaneously, the partition plates are placed in parallel with wall surfaces such that flow velocity distribution between opposing wall surfaces of the measuring flow path is more symmetrical with respect to the center of the flow direction of the measured fluid.

Abstract: An acoustic volume sensing device is disclosed. The device includes a housing comprising a reference volume chamber and a variable volume chamber, the reference volume chamber and the variable volume chamber connected by a resonant port, a first MEMS microphone located in acoustic relation to the variable volume chamber, a second MEMS microphone located in acoustic relation to the reference volume chamber, a MEMS speaker located in acoustic relation to the reference volume chamber, and a circuit board in electric connection with the first and second MEMS microphones and the MEMS speaker.

Abstract: The invention relates to a thermal flow sensor comprising: a support, at least one element intended to be vibrated relative to the support, suspension means for said vibrating element relative to the vibrating element, means for heating the vibrating element, means for electrostatic excitation of the vibrating element so as to vibrate it at its resonance frequency, piezoelectric gauges for detecting the resonance frequency variation of the vibrating element, the gauges forming means for heating the vibrating element by Joule effect and the suspension means comprising two beams formed by nanowires so as to reduce the heat losses from the vibrating element toward the support.

Abstract: A measurement device determines a volume flow based on acoustic flow measurement methods in a pump system and a method produces the measurement device. The measurement device includes a measurement path with two coupling wedges with two sound transducers disposed on the coupling wedges. The pump system and the coupling wedges are made of metal or a metal alloy.

Abstract: The present invention provides an ultrasonic flow meter unit which can eliminate design factors associated with measuring performance, and improve general versatility and diversity. An ultrasonic flow meter unit of the present invention comprises a measurement fluid passage through which a fluid flows; a pair of ultrasonic transducers provided on the measurement fluid passage; and a measuring circuit board which measures a propagation time of an ultrasonic signal transmitted and received between the ultrasonic transducers, and calculates a fluid flow, lead pins bent with a predetermined angle are connected to terminals of the ultrasonic transducers, and the measuring circuit board is on-board mounted to the measurement fluid passage, and then the lead pins are connected to the measuring circuit board.

Abstract: The present invention relates to a vibrating flow meter (210) and a method of providing a vibrating flow meter (210). The vibrating flow meter (210) includes a conduit (103A) and a driver (104) configured to vibrate the conduit (103A). The vibrating flow meter (210) also includes a first pick-off (105). The first pick-off (105) includes a first pick-off component (105a) and a second pick-off component (105b). The vibrating flow meter (210) also includes a reference member (150). The first pick-off component (105a) is coupled to the reference member (150) while the second pick-off component (105b) is coupled to the conduit (103A) proximate the first pick-off component (105a). The vibrating flow meter (210) also includes a balancing element (253) coupled to the reference member (150).

Abstract: Implementations of the present disclosure are directed to a flowmeter method and system. In an implementation, a signal is received a signal from a flowmeter and a value is determined based on the signal. The value is compared to a threshold. A heartbeat value is provided when the value is greater than a threshold value. In some implementations, a flow rate of a fluid is based on the heartbeat value. In some implementations, the heartbeat value is monitored and an alarm is selectively generated based on the monitoring.

Abstract: A wearable infusion pump assembly including a reservoir for receiving an infusible fluid, and a fluid delivery system configured to deliver the infusible fluid from the reservoir to an external infusion set. The fluid delivery system includes a volume sensor assembly configured to receive a quantity of the infusible fluid from the reservoir. The volume sensor assembly includes an acoustically contiguous region having a volume that varies based upon the quantity of infusible fluid received from the reservoir, and an acoustic energy emitter configured to provide acoustic energy at a plurality of frequencies to excite a gas included within the acoustically contiguous region.

Abstract: A method for manufacturing an ultrasonic transducer for use in a fluid medium. At least one piezoelectric transducer element is joined directly or indirectly to at least one matching member for promoting vibration coupling between the piezoelectric transducer element and the fluid medium. A matching member is used which has at least one porous molding of a polymer.

Abstract: A flow cell for a plurality of sensor assemblies to communicate with a flow meter for measuring characteristics. The flow cell includes a sensor body with a sensor body bore extending through the sensor body. The flow cell also includes a sensor body quadrant extending outwardly from the sensor body bore on a side of the flow cell, wherein the sensor body quadrant intersects the sensor body bore. A plurality of sensor ports extend through the sensor body quadrant to provide openings from the exterior of the flow cell to the sensor body bore in which sensor assemblies can be inserted. A cable channel extends internally within the sensor body quadrant at least from the plurality of sensor ports to an access port on the exterior of the flow cell for routing cables from the sensor ports to communicate with the flow meter.

Abstract: An ultrasonic flow meter is disclosed comprising at least one ultrasonic transducer, wherein the transducer comprises a piezoelectric disc, a nonconductive polymeric material and an electrically conductive layer between the piezoelectric disk and the nonconducting polymeric material.

Abstract: An ultrasonic transducer is described for use in a fluid medium. The ultrasonic transducer includes at least one piezoelectric transducer element and at least one matching element for promoting an oscillation injection between the piezoelectric transducer element and the fluid medium. The ultrasonic transducer also includes a housing (112), the piezoelectric transducer element being inserted in the housing. The housing has at least one opening facing the fluid medium, the matching element being inserted at least partially into the opening. The ultrasonic transducer also has at least one sealing element, which seals at least one intervening space between the matching element and the housing in such a way that an inner space of the housing is at least largely sealed from the fluid medium.

Abstract: An ultrasound flow meter unit arranged to measure a fluid flow rate with one or more ultrasound transducers (606), and a circuit board (602) with an electronic circuit arranged to operate the ultrasound transducer(s) (106, 306). The ultrasound transducer (606), e.g. in the form of a piezo-electric element, is mechanically fixed to the circuit board (602) by a first electrically conducting fixing means which additionally serve(s) to provide an electrical connection between an electrical terminal of the transducer (606) and the electronic circuit. Hereby a functional flow measurement unit (600) is provided which can be tested prior to assembly with a flow meter housing etc. Preferably, a set of ultrasound transducers (106, 306) are soldered directly onto electrically conducting paths (631) on a surface of the circuit board (602) being in electrical connection with the electronic circuit, e.g. in a single SMT mounting process together with mounting of all other electronic components on the circuit board (602).

Abstract: The invention relates to a device for the contactless flow measurement of fluids in flexible tubes.

Abstract: A vibrating flow meter (205) is provided. The vibrating flow meter (205) includes a single curved flow conduit (210), a conduit temperature sensor T1 (291) affixed to the single curved flow conduit (210), a balance structure (208) affixed to and opposing the single curved flow conduit (210), and a balance temperature sensor T2 (292) affixed to the balance structure (208). A conduit temperature sensor resistance of the conduit temperature sensor T1 (291) and a balance structure temperature sensor resistance of the balance temperature sensor T2 (meter2) are selected to form a predetermined resistance ratio.

Abstract: A system and method for ultrasonic flow metering. In one embodiment, an ultrasonic flow metering system includes a plurality of ultrasonic flowmeters. Each of the ultrasonic flowmeters includes a flow processor. The flow processor is configured to maintain a plurality of velocity bins, each of the bins corresponding to a flow velocity range for the flowmeters. The flow processor is also configured to maintain, within each of the bins, a value indicative of past average velocity of fluid flow through a given one of the flowmeters associated with a given one of the bins. The flow processor is further configured to determine, responsive to one of the flowmeters having failed, an estimated average fluid flow velocity through the system based on the values maintained within the bins.

Abstract: An ultrasonic flow measurement system having a first ultrasonic sensor with a first ultrasonic buffer and a second ultrasonic sensor with a second ultrasonic buffer is disclosed. The first and second ultrasonic buffers have different cross sections in order to reduce distortion of the ultrasonic signals.

Abstract: A sensor probe comprises a tube, a sensor element and an absorber mass. The tube is for placement in a process fluid flow within a fluid conduit and comprises a first end for coupling to the fluid conduit and a second end for insertion into the process fluid flow. The sensor element is in communication with the tube. The absorber mass is coupled to the tube and is configured to dampen vibration of the tube when inserted in the process fluid flow.

Abstract: Unique characteristic sounds produced as urine impacts the surface of the water are used to monitor men's urinary flow patterns and their dynamics. By detecting the intensity at selected acoustic frequencies, it is possible to accurately and precisely measure the urine flow rate. Techniques for analyzing urine flow and its dynamics employ sound levels that are detected with digital filters at two or more distinct frequency regions or channels of the sound spectrum. One frequency region that is designated the measurement channel is where the sound measurement intensity strongly depends on urine flow levels. Another frequency region that is designated the reference channel is where the sound measurement intensity is not dependent on urine flow levels. By using a combination of measurements from the measurement channel and the reference channel, the urine flow monitoring apparatus compensates for variations in operating conditions and other factors during use.

Abstract: The present invention provides an acoustic flow meter assembly (2) for pipes or open channels, said assembly including a frame (24) with a predetermined geometry. The frame has at least one user accessible port (36-42) with the at least one user accessible port (36-42) adapted to receive an interchangeable cartridge (44) which contains at least one acoustic transducer (46) to measure fluid velocity through said frame (24).

Abstract: A torsional sensor for sensing at least one parameter of a fluid is disclosed. The torsional sensor includes a torsional portion coupled to a reference portion and including a plurality of projections extending outward and spaced apart from each other. At least a portion of the torsional sensor is mountable for immersion in the fluid and operable to propagate a torsional wave that interacts with the fluid along the at least portion of the torsional sensor so as to affect propagation of the torsional wave in a manner dependent on the at least one parameter of the fluid.

Abstract: A signal processor receives a signal containing information about a sensor that is spirally wrapped at a known pitch or separation down a pipe having a flow; and determines a flow velocity based at least partly on the information contained in the signal received by applying an autocorrelation function that depends on a relationship between the time between a repeating pattern and the known pitch or separation of the spirally wrapped sensor. The signal processor provides a corresponding signal containing information about the flow velocity. The sensor includes a strain sensor, including a piezo-electric polymer strain sensor fabricated from PVDF, and/or two or more equally spaced spirally wound sensors. The determining includes correlating output signals of two or more equally spaced spirally wound sensors to determine a time delay, and determining the flow velocity based on the time delay and the known pitch or separation.

Abstract: An ultrasonic transducer for an ultrasonic flow measuring device, comprising a first housing part having an ultrasonic window and adjoining, rotationally symmetric walls, wherein there adjoins on the walls of the first housing part, coaxially with the walls of the first housing part, a first ring as resonator, which forms an end of the first housing part.

Abstract: Systems for and methods of assessing urinary flow rate via sound analysis. Embodiments of the uroflow measurement systems include a computer and a telephone or a digital recording mechanism to capture the sound of one or more urination events, which are stored as audio files in a database. The uroflow measurement systems may include sound analysis software for analyzing the strength and duration of each urination event and may include a web-based uroflow software application for viewing the results via the Internet or other network. In one embodiment, the sound analysis software performs the steps of reading in the raw data of a selected audio file, generating a plot of the audio signal amplitude vs.

Abstract: A conduit P is clamped within a clamping hole 16 formed by min body 1, left and right side plates 2, 4 and top plate 3. The clamping hole is maintained by a locking mechanism 5, 5a and 11, and the conduit is deformed to have a substantially square cross section. Ultrasonic signal transmission and reception elements 13a and 13b are arranged in the main body such that an ultrasonic beam emitted from one of the elements is received by the other element after the beam is reflected by the top plate.

Abstract: A flow meter is disclosed having a meter body that is enveloped by a shroud having a compliant band disposed at least partially about the meter body. The shroud protects transducers and transducer cables. The shroud forms a chamber between the shroud and meter body, and includes a releasable portion to allow access into the chamber.

Abstract: A data processing system and a computer program product for monitoring water consumption. A set of locations in a fluid transport system in a structure is monitored for sounds generated by a fluid flowing at an endpoint of the fluid transport system. Current acoustic data is generated for the sounds detected from monitoring the set of locations. The current acoustic data is compared with historical acoustic data to form a difference. A determination is made as to whether the difference exceeds a threshold. An action is performed in response to determining that the difference exceeds the threshold.

Abstract: A peristaltic pump, and related system method are provided. The peristaltic pump includes a cam shaft, first and second pinch-valve cams, first and second pinch-valve cam followers, a plunger cam, a plunger-cam follower, a tube receiver, and a spring-biased plunger. The first and second pinch-valve cams are coupled to the cam shaft. The first and second pinch-valve cam followers each engage the first and second pinch-valve cams, respectively. The plunger cam is coupled to the cam shaft. The plunger-cam follower engages the plunger cam. The tube receiver is configured to receive a tube. The spring-biased plunger is coupled to the plunger-cam follower such that the expansion of the plunger cam along a radial angle intersecting the plunger-cam follower as the cam shaft rotates pushes the plunger cam follower towards the plunger and thereby disengages the spring-biased plunger from the tube. A spring coupled to the spring-biased plunger biases the spring-biased plunger to apply the crushing force to the tube.

Abstract: An ultrasonic transducer for an ultrasonic flow measuring device, comprising a first housing part and a second housing part. The second housing part is axially guided in the first housing part and is so biased relative to the first housing part that, in a first state of the ultrasonic transducer, a first axial stop of the second housing part rests on a first axial stop of the first housing part, wherein, by applying, counter to the bias, a predetermined force on a second axial stop of the second housing part, the second housing part is axially shiftable, so that, in a second state of the ultrasonic transducer, the first axial stop of the second housing part is moved out of the first state.

Abstract: The invention relates to a method and a device for monitoring and/or optimizing flow processes, in particular injection molding processes. Vibrations caused by a flow of a material are detected and analyzed, wherein a vibration spectrum is detected at different times or in a (virtually) continuous manner and subjected to a multidimensional analysis.

Abstract: The invention relates to an ultrasonic flow meter housing and to an ultrasonic flow meter comprising a housing. The housing is a monolithic polymer structure being cast in one piece. The monolithic structure includes a straight flow tube and a cavity separated from the flow tube, where a shared wall part forms part of the wall of the flow tube and of an inside surface of the cavity. The cavity is arranged for housing at least one ultrasonic transducer at the shared wall part, and a measurement circuit operationally connected to the at least one ultrasonic transducer. In an embodiment, the cavity only has a single opening which can be sealed off by a cover.

Abstract: A measuring transducer comprises at least one measuring tube for carrying a flowing medium as well as a transducer housing mechanically coupled with the at least one measuring tube. The transducer housing includes: an inner shell forming a cavity accommodating the at least one measuring tube; and an outer cladding formed at least partially by means of yarn, namely cladding placed outside of the cavity and surrounding the inner shell.

Abstract: An apparatus for analyzing fluid flow in a pipe includes an ultrasonic flowmeter having a plurality of transducers. The apparatus includes a flow element having a completely smooth bore through which the fluid flows, and a plurality of cavities, each of the cavities has one of the plurality of transducers disposed in it and which is in communication with the fluid flowing through the bore. An apparatus for analyzing fluid flow in a pipe includes an ultrasonic flowmeter having a plurality of transducers. The apparatus includes a flow element having a bore with an internal diameter and a surface through which fluid flows, a plurality of cavities each of which has an opening in the surface. Each of the cavities has one of the plurality of transducers disposed in it.

Abstract: Appurtenances added to a pipe mitigate the effects of upstream valves, sluice gates or pipe elbows to condition the pipe flow for accurate flow rate detection by a reverse propeller meter. Further appurtenances allow the reverse propeller meter to be used in extreme debris situations such as weeds, vines and moss present in many canal systems. The system provides an electronic signal that indicates flow rate and accumulated flow volume, or the signal can be transmit to a central headquarters for remote gate control or canal automation.

Abstract: A torsional sensor including a high-pressure sealing mechanism for sensing at least one parameter of a high-pressure fluid. The torsional sensor includes a torsional portion including a torsional rod sensor, a reference portion coupled to the torsional portion and including a transducer device and a high-pressure sealing mechanism coupled to the reference portion and the torsional portion and in sealing arrangement therewith. The high-pressure sealing mechanism is configured to provide for sealing therein the transducer device and allow for protrusion therethrough of a torsional rod sensor. At least a portion of the torsional sensor is mountable for immersion in the high-pressure fluid and operable to propagate a torsional wave that interacts with the high-pressure fluid along the at least portion of the torsional sensor so as to affect propagation of the torsional wave in a manner dependent on the at least one parameter of the high-pressure fluid.

Abstract: A flow cell that includes a sensor body with internal cable channels for routing cables from the sensor ports to communicate with a flow meter is disclosed.

Abstract: The present invention relates to a housing arrangement for an ultrasound flow meter, comprising a unipartite or multipartite housing (2) provided to be connected to a fluid line, comprising an ultrasonic transducer having an ultrasonic transducer body and a housing or covering which at least partially surrounds the ultrasonic transducer body, comprising a housing opening provided in the housing (2) for positioning the ultrasonic transducer at the housing arrangement, comprising a sealing element arranged between the housing (2) and the ultrasonic transducer, wherein a housing insert (5) can be inserted in the housing opening (16) as a module, the housing insert (5) is adapted to receive at least two ultrasonic transducer bodies (4, 7) which are positioned separately, without the ultrasonic transducer body (4, 7) coming into contact with the fluid, and the housing insert (5) is connected to the housing (2) via a sealing element (13) which is common to the ultrasonic transducer bodies (4, 7) which are positione

Abstract: At least one embodiment is directed to a sensor for measuring a parameter. A signal path of the system comprises an amplifier (612), a sensor element, and an amplifier (620). The sensor element comprises a transducer (4), a waveguide (5), and a transducer (30). A parameter such as force or pressure applied to the sensor element can change the length of waveguide (5). A pulsed energy wave is emitted by the transducer (4) into the waveguide (5) at a first location. The transducer (30) is responsive pulsed energy waves at a second location of the waveguide (5). The transit time of each pulsed energy wave is measured. The transit time corresponds to the pressure or force applied to the sensor element.

Abstract: A method and device for measuring the flow speed of a fluid, in one example, of air, is provided.

Abstract: An objective of the invention is to provide a multilayered flow passage member that enhances fluid measurement accuracy of an ultrasonic fluid measurement apparatus and an ultrasonic fluid measurement apparatus using the multilayered flow passage member. When fusible projections 20 are fused by a heating head 21 while partition plates 11 are inserted into side plates 13 and 14, a fused state provided by the heating head 21 changes according to either side of each of the partition plates 11, because fuse surfaces at leading ends of the respective fusible projections 20 are sloped in the vertical direction. An outermost end of each of fusible projections 25 that first contacts the heating head 21 is first fused. During a course of the fusible projections 25 being fused toward their roots, the partition plates 11 are pressed against ends of respective insert holes 17a that are on the opposite side of the outermost ends that are first fused.

Abstract: At least one embodiment is directed to a sensor for measuring a parameter. A signal path of the system comprises an amplifier (612), a sensor element, and an amplifier (620). The sensor element comprises a transducer (4) at a first location of a waveguide (5), and a reflective surface (30) at a second location of the waveguide (5). A parameter such as force or pressure applied to the sensor element can change the length of waveguide (5). A pulsed energy wave is emitted by the transducer (4) into the waveguide (5) at the first location. The transducer (4) is responsive to pulsed energy waves reflected from reflective surface (30) to the second location. The transit time of each pulsed energy wave is measured. The transit time corresponds to the pressure or force applied to the sensor element.

Abstract: Systems and methods are provided that relate to determining the phase compositions of a multiphase fluid flow in a fluid line, including determining a flow velocity parameter which is related to the flow velocity of the fluid flow in the fluid line using a flow sensor and obtaining a vibration signal from the fluid flow using a vibration sensor comprising a target disposed in the fluid flow which vibrates in response to fluid flow in the fluid line. The signal may be analysed to determine an energy parameter which is related to the energy of the vibration signal within a frequency band, and a phase composition parameter, such as a dryness parameter, relating to the phase compositions of the fluid flow is determined using the flow velocity parameter and the energy parameter. An apparatus for determining the phase compositions of a multiphase fluid flow in a fluid line is disclosed.

Abstract: The invention relates to a fluidic system that includes a body structure having a chamber disposed therein. The fluidic system includes at least one fluid input at a first end of the chamber and at least one fluid output at a second end of the chamber. The fluidic system also includes a sensor device (e.g., an acoustic device) having a surface defining a portion of a surface of the chamber. The fluidic system also includes a first surface at the first end of the chamber oriented at an oblique or arcuate (e.g., curved) angle relative to the surface of the sensor device to direct fluid through the chamber.

Abstract: The present invention relates to an ultrasound transducer assembly for an ultrasound flowmeter, comprising a one-part or multi-part housing (2), which is provided to be connected to a line carrying the medium to be measured, wherein the ultrasound transducer transmits ultrasound through the housing (2) and the ultrasound transducer assembly has the following features: an ultrasound transducer body (4, 7) with a first main surface on the side facing the medium and a second main surface on the side facing away from the medium, first, preferably planar, contact means for electrically contacting the first main surface of the ultrasound transducer body (4, 7), second, preferably planar, contact means for electrically contacting the second main surface of the ultrasound transducer body (4, 7), wherein the first contact means are located between the ultrasound transducer body (4, 7) and the housing (2), through which ultrasound is to be transmitted, of the ultrasound flowmeter.

Abstract: A wind energy installation is disclosed. The wind energy installation includes a rotor with at least one rotor blade. The wind energy installation includes at least one wind speed measuring system. The at least one wind speed measuring system optically measures the vibrations of an optical fiber due to vortex shedding.

Abstract: A method and an apparatus for determining at least one flow characteristic of an essentially laminarly flowing, gaseous or liquid medium in a pipeline. Distinguishing features include: that at least one modulation element introduced into, or placed in, the pipeline produces, at least for the case, in which the medium is flowing with a velocity different from zero, a change in density of the medium, at least at times, in the vicinity of the modulation element; that at least one mechanically oscillatable unit introduced into, or placed in, the pipeline and spaced from the modulation element is excited to resonant oscillations; that mechanical oscillations are received by the mechanically oscillatable unit and converted into an electrical, received signal, wherein the received signal is sensitive to the density change; and that the at least one flow characteristic of the medium is determined from the reaction of the received signal of the mechanically oscillatable unit to the density change.

Abstract: A measuring device for registering at least one measured value of at least one process variable. The measuring device comprises a measuring tube. The measuring tube has at least one T-joint, on which at least one measurement transmitter is arranged, wherein the measuring tube together with the T-joint is monolithic, and wherein the T-joint is producible from the measuring tube at least partially by a plastic deformation method.

Abstract: The ultrasonic flaw-rate measurement unit of the invention includes a flow measurement path inside which fluid to be measured flows through and to which a case accommodating a pair of ultrasonic transducers is installed, a pair of ultrasonic transducers disposed in the flow measurement path, a measuring circuit substrate incorporating a propagation time measuring part measuring a propagation time between the ultrasonic transducer transmitter and receiver and a flow-rate calculating part calculating a flow rate of the fluid to be measured based on the propagation time measured by the propagation time measuring part, and a damping material filling an interior space of the case and covering the pair of ultrasonic transducers.

Abstract: An ultrasonic consumption meter includes an ultrasonic transducer for emitting and receiving ultrasonic waves, a flow channel, an electronic circuit for operating the meter, and a housing for the ultrasonic transducer and the electronic circuit. The housing is locked in position relative to the flow channel by a locking mechanism.

Abstract: A method of detecting one or more blocked sampling holes in a pipe of an aspirated smoke detector system. The method includes ascertaining the base flow of fluid through a particle detector using a flow sensor; monitoring subsequent flow through the particle detector; comparing the subsequent flow with the base flow; and indicating a fault if the difference between the base flow and the subsequent flow exceeds a predetermined threshold.