Class / Patent application number | Description | Number of patent applications / Date published |
073100350 | With pressure measurement or plural flowmeters | 14 |
20080302169 | METHOD FOR DETECTING CORROSION, EROSION OR PRODUCT BUILDUP ON VIBRATING ELEMENT DENSITOMETERS AND CORIOLIS FLOWMETERS AND CALIBRATION VALIDATION - A method and apparatus for validating the flow calibration factor of a Coriolis flowmeter. In accordance with a first embodiment, an improved material density is obtained by measuring material density when the temperature of the material is equal to a predetermined reference temperature. In accordance with a second embodiment, a preprogrammed data base stores density/temperature relationships. Improved density information is obtained by measuring the density and temperature of the material, applying the measured density/temperature information from the data base, and obtaining density information compensated for a predetermined reference temperature. The improved density information obtained for both embodiments is unaffected by temperature changes and is used to validate the flow calibration factor. The flow calibration factor compensation for pressure changes and changes in material composition is obtained in a similar manner. | 12-11-2008 |
20090113985 | FLUID FLOW MEASURING AND PROPORTIONAL FLUID FLOW CONTROL DEVICE - Embodiments disclosed herein provide restrictive-flow flow measurement devices, valve improvements and signal control devices and processes that control the flow of liquids, including control processes for single-liquid calibration. In some embodiments, a fluid flow device can be calibrated using a single standard calibration fluid. The fluid flow of a first fluid through a flow meter is measured by calculating a first pressure difference between pressures sensed by two pressure sensors of the flow meter. The fluid flow of a second fluid through the flow meter is measured by calculating a second pressure difference between pressures sensed by the same two pressure sensors. A calibration coefficient is determined based upon the relationship between the flow rate, the fluid density and the calculated pressure difference for the first and second fluids. A relationship between the calibration coefficient and the kinematic viscosity of each fluid is then determined and stored. | 05-07-2009 |
20090183548 | METHOD AND APPARATUS FOR IN SITU TESTING OF GAS FLOW CONTROLLERS - Methods and apparatus utilize a rate of drop in pressure upstream of a gas flow controller (GFC) to accurately measure a rate of flow through the GFC. Measurement of the gas flow through the many gas flow controllers in production use today is enabled, without requiring any special or sophisticated pressure regulators or other special components. Various provisions ensure that none of the changes in pressure that occur during or after the measurement perturb the constant flow of gas through the GFC under test. | 07-23-2009 |
20090183549 | METHOD AND APPARATUS FOR IN SITU TESTING OF GAS FLOW CONTROLLERS - Methods and apparatus utilize a rate of drop in pressure upstream of a gas flow controller (GFC) to accurately measure a rate of flow through the GFC. Measurement of the gas flow through the many gas flow controllers in production use today is enabled, without requiring any special or sophisticated pressure regulators or other special components. Various provisions ensure that none of the changes in pressure that occur during or after the measurement perturb the constant flow of gas through the GFC under test. | 07-23-2009 |
20100162788 | Calibration of Dust Load Flow Measuring Systems - A method for calibrating a dust load flow measuring system is provided. The dust delivery line may be connected from a metering vessel to a calibration line leading to the input sluice in the delivery direction downstream of the installed dust load flow measuring device instead of to the gasification reactor. The input sluice is provided with a weighing unit such that the weight of the content of the input sluice is determined. A differential pressure that may be set is controlled between the metering vessel and the input sluice, the dust load flow is determined in a time interval. | 07-01-2010 |
20100218586 | METHODS AND DEVICES FOR DETERMINATION OF FLOW RESERVOIR VOLUME - A novel enhanced flow metering device is adapted for disposing into a flow material reservoir a known volume of flow material whereby software used in conjunction with a pressure sensor may be calibrated. Additionally, by measuring the known amount of flow material returning to the flow material reservoir, checks are quickly made to ensure the pressure sensor is behaving as expected. | 09-02-2010 |
20120180547 | FLOW MEASUREMENT DEVICES HAVING CONSTANT RELATIVE GEOMETRIES - Systems and methods are disclosed for differential pressure meters having a constant beta edge boundary defined by fluid displacement members of the meter. In some embodiments, a differential pressure meter may have an interchangeable fluid displacement member, such that each fluid displacement member replaced in the meter maintains a constant beta edge boundary. In other embodiments, a family of differential pressure meters having permanent fluid displacement members may maintain a constant beta edge boundary for each meter of the family of differential pressure meters. | 07-19-2012 |
20120204620 | DETERMINING DELAY TIMES FOR ULTRASONIC FLOW METERS - A system and method for calibrating an ultrasonic flow meter. In one embodiment, a method includes disposing a fluid circulating device within a flow meter. Fluid is circulated in the flow meter by operation of the fluid circulating device. An acoustic signal transit time within the flow meter is measured during the circulating. Based on the measuring, a portion of the acoustic signal transit time caused by latency induced by components of the flow meter is determined. | 08-16-2012 |
20130291620 | RE-CALIBRATION OF INSTRUMENTS - A pressure differential meter ( | 11-07-2013 |
20130319074 | DIFFERENTIAL PRESSURE TRANSMITTER WITH REDUNDANT SENSORS - A system for measuring flow of process fluid through process piping, includes a flow restriction in the process piping generating a differential pressure between an upstream side of the restriction and a downstream side of the restriction. The differential pressure is related to flow of the process fluid. First and second upstream pressure transmitters are coupled to the process piping on the upstream side of the flow restriction and measure respective first and second upstream pressures. First and second downstream pressure transmitters are coupled to the process piping on the downstream side of the flow restriction and measure respective first and second downstream pressure of the process fluid. Flow rate of the process fluid is calculated based upon at least one upstream pressure and one downstream pressure. Further, degradation in at least one of the pressure transmitters is identified based upon at least two pressure measurements. | 12-05-2013 |
20140150520 | SYSTEM AND METHOD FOR MEASURING FLOW RATES FOR INDIVIDUAL PETROLEUM WELLS IN A WELL PAD FIELD - A dynamic calibration system and method for measuring flow rates for individual petroleum wells in a well pad are provided. The dynamic calibration system and method include means for performing custom-calibration of said pressure sensor for each individual well to enhance the accuracy of the resulting flow rate measurements. | 06-05-2014 |
20140174146 | Calibration Tube for Multiphase Flowmeters - An automated calibration device that comprises a tube for trapping a multiphase sample between three ultrasound (US) transducer pairs wherein each of the three transducer pairs is positioned to measure a different fraction of the multiphase sample. | 06-26-2014 |
20150082859 | MULTI-SENSOR CONTROL CIRCUIT AND METHOD FOR USING THE SAME - A multi-sensor control circuit used in an electronic cigarette comprises a control module, at least two inhalation sensors, and at least two unidirectional circuits corresponding to the inhalation sensors. An output terminal of each inhalation sensor is connected to an input terminal of a corresponding unidirectional circuit, and output terminals of the unidirectional circuits are all connected to a same input pin of the control module. Each inhalation sensor outputs a sensing voltage signal to the corresponding one of the unidirectional circuits upon sensing airflow. Each unidirectional circuit filters the sensing voltage signal received from a corresponding inhalation sensor to generate a unidirectional voltage signal, and outputs the unidirectional voltage signal to the input pin of the control module. The control module controls the electronic cigarette to work upon receiving the unidirectional voltage signal outputted from any unidirectional circuit. | 03-26-2015 |
20160178417 | method and apparatus for checking a pressure-based mass flow sensor in an air delivery system for an internal combustion engine | 06-23-2016 |