83 results about "Fluid volume" patented technology

The invention relates to a method for determining at least a flow velocity or a fluid volume flow of a fluid flowing through an implanted vascular support system, comprising the following steps: a) carrying out a pulsed Doppler measurement by means of an ultrasonic sensor of the support system, b) evaluating a measurement result from step a), which has a possible ambiguity, c) providing at least one operating parameter of a flow machine of the support system, d) determining at least the flow velocity or the fluid volume flow using the measurement result evaluated in step b), wherein the possible ambiguity of the measurement result is corrected using the operating parameter.

The invention discloses a gas-liquid low-temperature two-phase flow precise monitoring and metering test system, which comprises a segmented sensing acquisition module, a high-speed signal analysis module, a pulsation resonance identification module, an active damping control module, a phase change intelligent identification module and a monitoring metering output module, a plurality of groups of separated fluid dynamic response sensors are arranged in a low-temperature two-phase flow pipeline and are respectively positioned at a two-phase mixing inlet section, a middle stable section and an outlet section, so that segmented data acquisition is realized. The method has the advantages that the resonance risk caused by gas-liquid phase change can be accurately identified, a damping structure is regulated and controlled in real time, and system resonance and sensor damage are effectively avoided; meanwhile, through multi-point flow velocity fusion and gas phase molar fraction dynamic correction, high-precision measurement of the two-phase fluid volume flow is achieved, the measurement stability and the system safety are improved, and the device is widely suitable for low-temperature gas-liquid mixed transportation scenes.

The invention relates to a method for determining a total fluid volume flow (1) in the region of an implanted vascular support system (2), comprising the following steps: a) determining a reference temperature (3) of the fluid, b) determining a motor temperature (4) of an electric motor (5) of the support system (2), c) determining the thermal dissipation loss (6) of the electric motor (5), d) ascertaining the total fluid volume flow (1) using the reference temperature (3), the motor temperature (4), and the thermal dissipation loss (6) of the electric motor (5).

The invention relates to a method for determining a fluid volume flow (1) through an implanted vascular support system (2), comprising the following steps: a) determining a fluid temperature parameter in the region of a cannula (4) of the support system (2), b) operating a heating element (5) which can bring about a change in a fluid temperature in the cannula (4), c) determining the fluid volume flow (1) using at least the fluid temperature parameter or the change thereof and at least one heating element operating parameter or the change thereof. The invention also relates to a vascular support system.

A fluid damper having a damper housing with a first and a second fluid volume, and a damping piston located within the damper and separating the first and second fluid volume. The damper piston has a piston fluid pathway formed therethrough and between the first and second fluid volume. The fluid damper includes a fluid accumulator having an accumulator fluid volume. The fluid damper has a first fluid pathway extending between the first fluid volume and the accumulator fluid volume, and the fluid damper has a second fluid pathway extending between the second fluid volume and the accumulator fluid volume. A flow control valve is located in at least one of the first and the second fluid pathways, and the flow control valve has a non-zero threshold value.

A method of calibrating dosing valves of a sprayer system of an agricultural implement comprises initiating calibration by filling a calibrating tube with fluid having a fluid from an auxiliary tank of the sprayer system, measuring a volume of the fluid filled into the calibration tube, pumping the fluid in the calibration tube to the dosing valves to calibrate the dosing valves with respect to flow characteristics of the fluid with the dosing valves being capable of a high fluid flow rate to a low fluid flow rate ratio of at least 100:1 for the fluid. The method also includes pumping, during a pump from concentration tank mode, the fluid in the concentration tank to the dosing valves and then to a mixing apparatus with the fluid to be mixed with a carrier fluid from a primary tank of the sprayer system.

The invention discloses a low-temperature liquid cavitation numerical prediction method considering different-scale heat effects, and belongs to the field of low-temperature liquid cavitation numerical prediction. The implementation method comprises the steps that a corresponding fluid domain geometric model is established, grids are divided, a computational fluid mechanics model is established under the macro-scale, a separation vortex DES turbulence model is adopted, a fluid volume VOF model is used for capturing a macro-scale cavity interface, and convective heat transfer correction under the macro-scale is conducted on a cavitation model; establishing a cavitation kinetic equation considering heat conduction correction under the mesoscale, solving resistance, volume force, additional mass force, pressure gradient force and lift force suffered by the mesoscale discrete cavitation by using a DBM discrete phase model, and obtaining a movement track of the discrete cavitation in a cavitation flow field; and calculating the unsteady cavitation flow by taking a steady result as an initial value to obtain a flow field characteristic under a macroscale and a discrete cavitation dynamic evolution process under a mesoscale, thereby realizing quantitative description and high-precision numerical prediction of the unsteady cavitation flow.

Methods of actuating a needle array device can include causing fluid to move through flow channels to needle apertures that are spaced apart from an inflow aperture at different distances where flow channels that have approximately equal pathway lengths and where the fluid can reach tips of the needle apertures approximately simultaneously, which can provide an approximately equal dosage or fluid volume through the tips of the needle apertures.

A single use pouch device for carrying and subsequently dispensing a single use volume of a viscous skin treatment includes a pouch which contains a viscous skin treatment. The pouch has a total fluid volume sufficient to contain a pre-determined volume of the viscous skin treatment to cover a user's hands and arms. A first opening means is integrated into the pouch which enables a corner of the pouch to be removed thereby enabling the viscous skin treatment to be dispensed through the removed corner in a controlled manner. A second opening means is integrated into the pouch which enables the pouch to be divided thereby enabling the viscous skin treatment to be removed from the pouch. In this way the user can remove a maximum volume of the viscous skin treatment from the pouch.

Example methods, apparatuses, and computer program products for measuring fluid volumes are provided. An example fluid volume measuring assembly includes a first perforated tube, a total fluid volume measuring device, and a non-blood fluid volume measuring device. In some examples, the total fluid volume measuring device includes a membrane sack positioned in the first perforated tube and a first pressure sensor positioned in the membrane sack. In some examples, the non-blood fluid volume measuring device includes a second perforated tube covered by a filter paper and positioned in the first perforated tube and a second pressure sensor positioned in the second perforated tube.

The invention relates to the technical field of fracturing, in particular to a method and device for determining the mixing proportion of fracturing fluid, a medium and a product, and the method comprises the steps that the fluid injection amount of a target stratum is determined based on a relational expression between an engineering dessert coefficient and a sand-fluid ratio, a relational expression between the sand-fluid ratio and the fluid injection amount and a stratum engineering dessert coefficient; determining the ultra-high viscosity slick water liquid amount from the turning point of the ultra-high viscosity slick water liquid amount of the fractured section; based on the turning point ratio of the high-viscosity slick water to the low-viscosity slick water, the liquid injection amount of the target stratum and the liquid amount of the ultra-high-viscosity slick water, the liquid amount of the high-viscosity slick water and the liquid amount of the low-viscosity slick water are obtained; according to the method, the proportion of slick water with different viscosities can be determined more scientifically, uncertainty caused by trial and error and blind reference to adjacent wells is avoided, and the method has positive effects on optimizing fracturing construction parameters, increasing fracturing volume, reducing fracturing cost and improving fracturing efficiency.

A fluidic pump test device includes a fluidic pump, a pressure influencing device, and an evaluation device. The fluidic pump is configured to be driven by a drive device. The fluidic pump is configured such that a rotational speed of the fluidic pump, which leads to a fluid volumetric flow on an output side of the fluidic pump, is known. The pressure influencing device is configured to: (i) conduct, at least temporarily, the fluid volumetric flow; and (ii) during operation of the fluidic pump, bring about a pressure drop. The evaluation device is configured to, based on a decrease of the pressure drop, determine a reduction in a functional capability of the fluidic pump.

A medicinal infusion system includes a safety valve for isolating residual medication by providing a single point of fluidic disconnect to encapsulate a residual fluid volume prone to spillage. The safety valve couples a medicinal repository such as an infusion pump to a medicinal supply, typically from a syringe or tubing. The safety valve includes a resilient, deformable, or hinged surface for isolating and sealing the medicinal flow to eliminate and / or isolate any residual volume in tubing and connectors. The isolating surface accommodates an inserted fitting or coupling for allowing the medicinal flow to fill the infusion pump. Upon disconnection, fluids on either side of the safety valve are therefore isolated on the respective fill or source sides, and residual volume prone to spillage is eliminated.

The application discloses a switchable gas detection device and method for a gas-liquid two-phase flow pipeline, which comprises a main pipeline, a container, a first baffle plate, a first bypass pipeline, a second bypass pipeline, a first valve, a second valve, a flowmeter and a water supplement valve. The container is divided into a first cavity and a second cavity by the first baffle plate, and a gap is left between the first baffle plate and the inner bottom wall of the container. The main pipeline is connected with the first cavity through the first bypass pipeline, and the second cavity is connected with the main pipeline through the second bypass pipeline. The first valve is arranged on the first bypass pipeline, the second valve and the flowmeter are arranged on the second bypass pipeline, and the water supplement valve is arranged on the top of the container and connected with the container. The application realizes the natural separation of gas and fluid based on the density difference between gas and liquid, does not need to additionally configure a separation device, has the advantages of simple structure and low cost, can analyze the composition of the separated gas, and can directly record the volume of the gas and the volume of the fluid in unit time after separation. The volume of the gas is divided by the volume of the fluid, so that the proportion of the gas can be calculated.

An injection system is described that receives, from one or more sensors, a first group of one or more signals indicating a current volume of injection fluid dispensed from a fluid reservoir at a first time. The injection system determines, based on the first group of one or more signals, that a difference between a dispensed volume limit and the current volume of the injection fluid dispensed from the fluid reservoir at the first time is less than a necessary volume of fluid required to complete both a systolic injection phase and a diastolic injection phase. The injection system further, responsive to determining that the difference is less than the necessary volume of fluid required to complete both the systolic injection phase and the diastolic injection phase, controls the injection system to refrain from performing each of the systolic injection phase and the diastolic injection phase.

A system for measuring changes in a fluid stored within a container is disclosed. The system may include a radio-frequency sensing element disposed externally on the container and configured to generate a signal indicative of at least one dielectric property of the fluid, wherein the fluid undergoes composition-based or environment-driven changes due to interactions with the container. In some aspects, a processing component generates an output representative of at least one time-varying fluid characteristic. In some aspects, the container is a wooden barrel with an interior surface adapted to impart flavor or chemical changes to the fluid. In some aspects, the fluid is a beverage including at least one of wine, beer, and distilled spirits, with the time-varying characteristic including a fermentation parameter that changes over time. In some aspects, the at least one time-varying fluid characteristic of the fluid includes at least one of fluid level or fluid volume.

The invention relates to a device for controlling the movement of a fluid (F) comprising: A microfluidic capsule (1) which comprises a microfluidic chamber (10), at least one microfluidic channel (11) opening into said microfluidic chamber (10), and a membrane (13) deformable inside said microfluidic chamber to move a volume of fluid outside the chamber towards said microfluidic channel or to suck a volume of fluid towards the inside of the microfluidic chamber, A device for actuating the membrane (13), the actuating device comprising an actuating channel (20) opening opposite the membrane,The actuating device comprising an actuating liquid (L) placed in the actuating channel (20) and pneumatic actuating means (2) connected to the actuating channel (20) and configured to inject an actuating gas (G) into said actuating channel (20) in order to pressurize said actuating liquid against the membrane (13) and deform it. Figure to be published with the abstract: Figure 2,

This invention discloses a gas-liquid two-phase flow measurement system and its usage method. The measurement system includes a gas-liquid separation module, a fluid volume measurement module, a gas volume measurement module, a video monitoring module, and a control system. The liquid outlet of the gas-liquid separation module is connected to the fluid volume measurement module. The gas volume measurement module includes a gas drying unit and a gas extraction unit, and the gas outlet of the gas-liquid separation module is sequentially connected to the gas drying unit and the gas extraction unit. The video monitoring module is set up corresponding to the gas-liquid separation module and is used to monitor the liquid level changes in the gas-liquid separation module in real time. The control system is communicatively connected to the fluid volume measurement module, the gas volume measurement module, and the video monitoring module. This invention realizes online, automatic, and high-precision cyclic measurement of gas and liquid two-phase volumes, can effectively analyze water vapor content, and is adaptable to various working conditions, showing broad application prospects in fields such as oil and gas reservoir exploration and development experiments.

Patient fluid management systems, particularly for use in treating patients at various stages of heart failure, are disclosed. Disclosed systems employ vascular dimension monitoring sensors to provide accurate, early, real-time estimation of circulating blood volume as an input metric to the system control, allowing for more accurate modulation of treatment based on the patient's current fluid volume state.

A method of detecting a fault condition in an infusion process, the method includes receiving a programmed flow rate pertaining to a fluid infusion provided by an infusion device; determining, a first weight of an infusion container associated with the fluid infusion provided by the infusion device at a first time; determining a second weight of the infusion container at a second time; determining based on the first weight and the second weight, a determined flow rate of the fluid infusion provided by the infusion device between the first time and the second time. The method includes determining a difference between the determined flow rate and the programmed flow rate. When a magnitude of the difference between the determined flow rate and the programmed flow rate satisfies a predetermined threshold, by the processor: causing an output of the infusion device or the weight sensor to indicate the fault condition.

The invention relates to a device for volume change compensation of fluids, in particular liquids, comprising a Container with a bottom, a Entrance and a Outlet and at least one expansion element which is arranged in the container and is fluidly connected to the inlet and outlet, wherein at least one elastic element is arranged, which is connected on the one hand to the floor and on the other hand to the expansion element in such a way that that a compressive or tensile force can be provided on the expansion element by means of the elastic element.

The invention relates to a diaphragm valve (1) for controlling a fluid medium, comprising a solenoid armature (10) which is arranged to be longitudinally movable in an interior space (31) of a pole tube (30) which is closed by a diaphragm (20) and which is connected with the diaphragm (20) in such a way that the diaphragm (20) is configured to be transferred by a longitudinal displacement of the solenoid armature (10) between a closed position in which the solenoid armature (10) pushes the diaphragm (20) onto a sealing seat (41) and closes a fluid passage (42), in particular a fluid inlet (43), and an open position in which the solenoid armature (10) lifts the diaphragm (20) from the sealing seat (41) and opens the fluid passage (42), in particular the fluid inlet (43). The invention is characterized in that the interior space (31) of the pole tube (30) contains a fluid (32) which represents a fluid volume and a gas (33) which represents a gas volume, wherein the fluid volume is greater than the gas volume.

A magnetically coupled precise liquid balance unit and a magnetically coupled precise liquid balance control device include an injection cylinder (1-1), a magnetically coupled driven component (1-2), and a magnetically coupled active component (1-3). The first end of the injection cylinder (1-1) has a first fluid inlet / outlet (1-4), and the second end of the injection cylinder (1-1) has a second fluid inlet / outlet (1-5). The magnetically coupled driven component (1-2) is located inside the injection cylinder (1-1) and divides the cavity of the injection cylinder (1-1) into a first inlet / outlet fluid cavity (1-6) and a second inlet / outlet fluid cavity (1-7). The magnetically coupled active component (1-3) is located outside the injection cylinder (1-1). The magnetically coupled active component (1-3) and the magnetically coupled driven component (1-2) interact with each other through magnetic force, and when the magnetically coupled active component (1-3) moves, it drives the magnetically coupled driven component (1-2) to reciprocate within the injection cylinder (1-1) through magnetic force. This magnetically coupled precision liquid balance unit can reduce the difference in fluid volume between the human body and the fluid during a single replenishment, greatly extending the continuous and reliable working time of the magnetically coupled precision liquid balance unit and the magnetically coupled precision liquid balance control device.

The present application relates to the technical field of oil and gas exploration and development, and discloses a method for determining gas-gas relative permeability curve in CO2 injection and CH4 displacement process.The present application establishes an experimental test and mathematical processing method for gas-gas two-phase seepage mechanism by regarding supercritical CO2 and CH4 as two independent fluids, aiming at the blank of lacking effective gas-gas relative permeability determination means in the prior art.The method comprises the following steps: core and fluid preparation, CH4 saturation, and CO2 injection and displacement test.The key of the method is as follows: the gas chromatograph is used to monitor the output gas components in real time, so that the components can be finely metered;the high temperature and high pressure volume correction mathematical model is introduced to convert the ground measurement value into the fluid volume under the formation condition;and the double gas permeability calculation and saturation normalization processing model is constructed to realize quantitative and accurate determination of the gas-gas relative permeability curve.The present application solves the problems that the components are difficult to distinguish and the relative permeability parameters are difficult to obtain in the gas displacement process, and provides high-precision basic data for dynamic evaluation of the reservoir gas displacement.

Pipetting device (1) for taking up and dispensing fluid volumes, comprising - a housing (2) with a base body (3) enclosing a cavity (5) and having an inner side (6) bounding the cavity (5), an outer side (7) and an opening (8), and - an assembly (15) comprising several components of the pipetting device (1), wherein the assembly (15) can be inserted into the cavity (5) of the base body (3) through the opening (8) of the base body (3) for assembly and is arranged in the cavity (5) of the base body (3) in the assembled state and is detachably attached to the base body (3), wherein a first guide device (16) is formed on the inside (6) of the base body (3), wherein the first guide device (16) has a guide rail (20) for guiding the assembly (15) during the assembly of the assembly (15), wherein a second guide device (17) is formed on the assembly assembly (15) and wherein at least temporarily during the assembly of the assembly unit (15) and in the assembled state of the assembly unit (15) the first guide device (16) engages with the second guide device (17).

The present teachings generally include devices, systems, methods, and computer program products for determining a fluid state of a patient using bioimpedance measurements or the like. In general, aspects of the present teachings may include one or more of the following: an eight-point electrode bioimpedance device comprising two (wired or wireless) handles with integrated sensors to measure distance, e.g., to enable measurement of body height and segment length; a technique for determining the fluid state of the patient from bioimpedance measurements of the patient's legs; improved techniques for determining fluid overload (or determining fluid state) using the ratio of extracellular volume (ECV) to total body moisture (TBW); and determining a fluid state and / or a fluid volume using the body segment resistance.

This application relates to thermodilution injection fluid measurement and control. Apparatus and methods for measuring, controlling (or both) the thermodilution injection fluid flow rate used to calculate a thermodilution pulmonary parameter. An injection fluid delivery system includes a syringe for containing injection fluid and a delivery tube configured at one end to connect to a catheter. A flow measurement device is inserted into the delivery tube to generate a signal used to determine the flow rate of fluid from the syringe to the catheter. A processor receives the signal from the flow measurement device and calculates the injection fluid volume to be used as an input for calculating a thermodilution pulmonary parameter such as cardiac output. A GUI is provided to guide the user as to whether the injection rate is too fast or too slow. The system can include a constant flow valve to provide a constant flow rate from the syringe rather than measuring or calculating the flow rate.