Abstract:
The present invention refers to a method for the isokinetic sampling of liquids and gases present in streams consisting of many fluid phases, and to an apparatus suitable for achieving it, which have application in particular in the field of oil extraction, wherein, after the extraction of liquid and gaseous hydrocarbons possibly accompanied by water and suspended solids, is it necessary to know the composition of the mixture extracted and also the flow rate of the single phases.
Abstract:
There is provided an apparatus for detecting the deteriorating health of a patient receiving gas from a respiratory device. The apparatus comprises a sensor unit configured to monitor a flow rate or pressure of a gas that is flowing in a pipe that connects the respiratory device to a gas delivery device worn by the patient, and a processor configured to measure a respiratory rate of the patient based on variations in the flow rate or pressure of gas in the pipe and to implement a trend analysis of the measured respiratory rate. The processor is configured to generate a warning when it determines that there is an upward trend in the measured respiratory rate and that a magnitude of the trend exceeds a threshold.
Abstract:
A system and method for detecting a leak in a hose of a hydraulic system having a control valve assembly with first and second work ports in fluid communication with an actuator is disclosed. In one aspect, the method includes estimating a first hydraulic fluid flow rate for fluid flowing from the control valve assembly first work port to the actuator. Another step may be estimating a second hydraulic fluid flow rate for fluid flowing from the actuator to the control valve assembly second work port. In one step, a proportional flow rate difference is calculated between the first and second hydraulic fluid flow rates. Subsequently, a flow error value can be calculated by subtracting the flow rate difference from a predetermined margin value. Where the flow error value integrated over time exceeds a total flow error threshold value, a hydraulic fluid leak signal can be generated.
Abstract:
Verfahren zur Massenflüssbestimmung eines durch eine Leitung strömenden Mediums, wobei das Medium die Leitung pulsierend durchströmt, wobei die Berechnung des Massenflusses durch eine Recheneinheit erfolgt und wobei Sensoren den Differenzdruck dp, den statischen Druck pstat und die Temperatur des die Leitung durchströmenden Mediums messen und die gemessenen Zustände jeweils in Form eines Signals bereitstellen, wobei, dass in einem ersten Verfahrensschritt von einem dp-Sensor bereitgestellte Signale ungefiltert an die Recheneinheit übermittelt werden und dass die Recheneinheit aus den vom dp-Sensor übermittelten Signalen der Sensoren einen Wert des Massenflusses für eine Zeiteinheit berechnet.
Abstract:
An aspect provides a method of metering flow through a fluid conduit having an obstruction therein, including: placing an obstruction body within the conduit; generating at least two differential pressure measurement signals using at least three different pressure ports, said at least three different pressure ports comprising: an upstream pressure port; a downstream pressure port; and an auxiliary pressure port; wherein at least one of the upstream pressure port, the downstream pressure port, and the auxiliary pressure port is positioned at an angle between 0 and 90 degrees with respect to a conduit wall; establishing a baseline relationship between the at least two differential pressure measurement signals; and determining if the baseline relationship between the at least two differential pressure measurement signals differs by a predetermined amount. Other aspects are described and claimed.
Abstract:
An apparatus comprises a flow sensor configured to sense airflow between a respiration machine and a patient, a first connector configured to communicate air between the flow sensor and the patient, a second connector configured to communicate air between the flow sensor and the respiration machine, multiple pressure sensing ports configured for connection to pressure sensing tubes and configured to communicate gas pressure between the flow sensor and a pressure flowmeter, and a filter integrated with the flow sensor between the first connector and the pressure sensing ports and configured to communicate gas pressure therethrough while preventing contaminants from passing from the flow sensor to the pressure sensing tubes.
Abstract:
A system and method are provided for estimating an instantaneous EGR mass flow rate corresponding to a flow rate of exhaust gas through an exhaust gas recirculation (EGR) conduit fluidly coupled between an exhaust manifold and an intake manifold of an internal combustion engine with an EGR cooler positioned inline with the EGR conduit. An operating position of the engine is monitored, and the instantaneous EGR mass flow rate is estimated at each of a plurality of fixed increments of the engine position based on EGR cooler outlet temperature, intake manifold pressure and a pressure differential across a flow restriction disposed inline with the exhaust gas conduit between the EGR cooler and the intake manifold.
Abstract:
An apparatus and method for determining the water cut value of a multiphase fluid flowing within a pipe is provided. The device includes a sequestering structure disposed within the pipe, a transmitting device, a receiving device, and a processing device. The sequestering structure at least partially defines a sensing passage within the pipe, which passage has a gap extending substantially normal to a direction of fluid flow within the pipe. The sensing passage is oriented to sequester an amount of a liquid component of the multi-phase fluid sufficient to form a continuous liquid body extending across the gap of the sensing passage. The transmitting device is operable to transmit a signal through the liquid across the gap of the sensing passage. The receiving device is operable to receive the signal after it has traversed the liquid within the sensing passage, and create sensor data. The processing device is in communication with at least the receiving device to receive and process the sensor data to determine the water cut value of the liquid.
Abstract:
L'invention concerne un système de mesure en temps réel du débit instantané d'un fluide en écoulement stationnaire ou instationnaire dans une conduite, comprenant un organe d'écoulement (1) du fluide muni d'au moins deux prises de pression (A, B) en paroi, un moyen de mesure (2) d'une différence de pression couple aux deux prises de pression (A, B), et un moyen de calcul (3) programme pour calculer Ie débit en temps réel par Ia résolution d'une équation différentielle ordinaire non-linéaire reliant Ie débit instantané à Ia différence de pression, Ia différence de pression dans ladite formule étant positive ou négative en fonction de Ia variation de Ia vitesse d'écoulement du fluide dans Ia conduite et/ou du sens de l'écoulement du fluide, l'organe d'écoulement (1) comprenant un filtre (4) placé entre les deux prises de pression (A, B) pour augmenter Ia perte de charge.