By Pressure Measurement Patents (Class 73/30.02)
  • Patent number: 10067081
    Abstract: Apparatus for determining and/or monitoring at least one limit value of a process variable of a medium in a container, comprising at least one sensor unit for registering a measured value dependent on the process variable and at least one electronics unit for producing a measurement signal dependent on the process variable. The invention is distinguished by features including that the apparatus is embodied to draw energy via a voltage output and a digital input of a recorder apparatus or a process control system.
    Type: Grant
    Filed: November 22, 2012
    Date of Patent: September 4, 2018
    Assignee: ENDRESS + HAUSER GMBH + CO. KG
    Inventors: Christoph Schleith, Michael Dotsch
  • Patent number: 9696248
    Abstract: Mechanical, electronic, algorithmic, and computer network facets are combined to create a highly integrated advanced sensor that monitors the gas density, state-of-repair, and events associated with switchgear. Measurements of gas pressure, atmospheric pressure, gas temperature, are used with models of the non-ideal behavior of a particular gas to realistically estimate gas density. A hierarchical system of signal processing optimizes measurements working within high-frequency, real-time, short-term, medium-term, diurnal, long-term, and historical timeframes and overcomes measurement errors present in real-world applications. The time at which a condition such as gas density will reach a particular level is calculated. Events such as threshold attainments and switchgear operation are detected. A large memory stores all raw data values allowing flexible re-processing and verification at any future time.
    Type: Grant
    Filed: April 29, 2015
    Date of Patent: July 4, 2017
    Assignee: Solon Manufacturing Company
    Inventor: Karl Frederick Scheucher
  • Patent number: 8973423
    Abstract: A measuring device according to the invention for determining the fill quantity of SF6 gas in an insulating chamber comprises a pressure transducer, a temperature measuring element and a processing device for determining the fill quantity of the SF6 gas from the pressure measurement value and the pertinent temperature measurement value, wherein the measuring device seals a corresponding opening of the insulating chamber and the SF6 gas to be measured acts directly upon both the pressure transducer and the temperature measuring element.
    Type: Grant
    Filed: January 30, 2009
    Date of Patent: March 10, 2015
    Assignee: Wika Alexander Wiegand GmbH & Co. KG
    Inventors: Thomas Heckler, Nicolas Bauer, Andreas Mueller
  • Patent number: 8806917
    Abstract: A density monitor is used for monitoring a gas density in a measured volume with a separating wall which separates a first reference chamber formed in a density monitor housing from the measured volume. The density monitor further includes a separating wall movement detection device for detecting movement of the separating wall. In order to reduce false alarms, a second reference chamber is formed outside of the density monitor housing. The second reference chamber is fluidically connected to the first reference chamber by a fluid line.
    Type: Grant
    Filed: December 9, 2011
    Date of Patent: August 19, 2014
    Assignee: Trafag AG
    Inventor: Remo Halbheer
  • Patent number: 8656756
    Abstract: A gas sensor including a metal shell; a detection element main body held by the metal shell; a porous protection layer coated on a leading end portion of the detection element main body; and a protector including a side wall surrounding an element protruding portion of the detection element main body protruding from a leading end of the metal shell. The side wall has introduction holes formed therein which allow gas to be introduced. The porous protection layer includes a first portion; and a second portion provided on a base end side with respect to the first portion and having a progressively reduced thickness in a direction toward a leading end of the detection element. The second portion is disposed closer to the base end of the detection element than the introduction holes in the axial direction.
    Type: Grant
    Filed: October 17, 2008
    Date of Patent: February 25, 2014
    Assignee: NGK Spark Plug Co., Ltd.
    Inventors: Masaki Mizutani, Shigeki Mori
  • Publication number: 20140020449
    Abstract: A method of measuring a density of two liquid phases in a mixture with a gas phase. The three phase mixture is fed into an inlet vertical column of a flow loop where the gas phase is separated from a liquid mixture of the two liquid phases. The gas phase rises to an upper section of the inlet vertical column, while the liquid mixture flows to a lower section. A differential pressure of the liquid mixture is measured in the lower section. A density of the liquid mixture is calculated using the measured differential pressure of the liquid mixture. A volume or mass percentage is determined for each of the liquid phases in the liquid mixture. A volumetric flow rate is measured. A volumetric flow rate and accumulated volume of each liquid phase is calculated based on the volume or mass percentage of that liquid phase in the liquid mixture.
    Type: Application
    Filed: July 17, 2012
    Publication date: January 23, 2014
    Applicant: Zedi Canada Inc.
    Inventors: Tokunosuke Ito, Andrew Jarman
  • Publication number: 20120318044
    Abstract: A density monitor is used for monitoring a gas density in a measured volume with a separating wall which separates a first reference chamber formed in a density monitor housing from the measured volume. The density monitor further includes a separating wall movement detection device for detecting movement of the separating wall. In order to reduce false alarms, a second reference chamber is formed outside of the density monitor housing. The second reference chamber is fluidically connected to the first reference chamber by a fluid line.
    Type: Application
    Filed: December 9, 2011
    Publication date: December 20, 2012
    Inventor: Remo HALBHEER
  • Publication number: 20120210768
    Abstract: A device for automated calibration of a multiphase flowmeter comprising a tube for trapping a multiphase sample along with three ultrasound (US) transducers is described herein. The calibration device is placed vertically, using two valves the tube traps a sample of the liquid in the tube. Then, once the three phases of the liquid separate, the ultrasound transmitters are used to determine the phase fractions of each phase.
    Type: Application
    Filed: February 22, 2011
    Publication date: August 23, 2012
    Applicant: Southern Methodist University
    Inventors: Yildirim Hurmuzlu, Edmond Richer
  • Publication number: 20120198917
    Abstract: Embodiments of the invention relate a charge indicator for determining the mass of a fluid contained within a fluid enclosure, wherein the charge indicator responds to a deformation of a solid component in contact with the fluid and wherein the deformation is a function of the mass of fluid contained within the fluid enclosure.
    Type: Application
    Filed: March 22, 2012
    Publication date: August 9, 2012
    Applicant: Societe BIC
    Inventors: Gerard F. McLean, Joerg Zimmermann
  • Publication number: 20120118043
    Abstract: A measuring device according to the invention for determining the fill quantity of SF6 gas in an insulating chamber comprises a pressure transducer, a temperature measuring element and a processing device for determining the fill quantity of the SF6 gas from the pressure measurement value and the pertinent temperature measurement value, wherein the measuring device seals a corresponding opening of the insulating chamber and the SF6 gas to be measured acts directly upon both the pressure transducer and the temperature measuring element.
    Type: Application
    Filed: January 30, 2009
    Publication date: May 17, 2012
    Applicant: WIKA ALEXANDER WIEGAND GMBH & CO. KG
    Inventors: Thomas Heckler, Nicolas Bauer, Andreas Mueller
  • Publication number: 20120078541
    Abstract: The present invention relates to a high-pressure quartz crystal microbalance sensor that is capable of measuring adsorption and diffusion characteristics of nanoporous materials and thin films at high pressures.
    Type: Application
    Filed: August 12, 2011
    Publication date: March 29, 2012
    Applicants: ConocoPhillips Company - IP Services Group, Georgia Tech Research Corporation
    Inventors: Peter HESKETH, Sankar Nair, Ken McCarley, Milad Navaei, Kevin Bagnall, Anandram Venkatasubramanian
  • Patent number: 7752885
    Abstract: A gas specimen mixture analysis system includes at least one sensor for measuring the concentrations of inert components in the gas specimen mixture, a pressure sensor for measuring the pressure of the gas specimen mixture, and a temperature sensor for measuring the temperature of the gas specimen mixture. A subsystem measures the speed of sound in the gas specimen mixture, and a processing subsystem, responsive to the at least one inert component sensor, the pressure sensor, the temperature sensor, and the subsystem for measuring the speed of sound, is configured to generate a number of sample gas mixtures with varying percentages of hydrocarbon gases, each including the measured inert component concentrations.
    Type: Grant
    Filed: December 7, 2006
    Date of Patent: July 13, 2010
    Assignee: General Electric Company
    Inventor: Yufeng Huang
  • Patent number: 7752884
    Abstract: A method of analyzing a gas specimen mixture includes measuring the concentrations of inert components in the gas specimen mixture and the pressure and temperature of the gas specimen mixture. A number of sample gas mixtures are generated with varying percentages of hydrocarbon gases, each including the measured inert component concentrations. For each generated sample gas mixture, the method includes calculating the speed of sound therein based on the measured pressure and temperature and the particular percentages of hydrocarbon gases therein, measuring the speed of sound in the gas specimen mixture, and iteratively comparing the measured speed of sound with the calculated speed of sound in different sample gas mixtures until convergence for a particular sample gas mixture. The molecular weight of the particular sample gas mixture is calculated, and set the molecular weight of the gas specimen mixture to the calculated molecular weight.
    Type: Grant
    Filed: December 7, 2006
    Date of Patent: July 13, 2010
    Assignee: General Electric Company
    Inventor: Yufeng Huang
  • Patent number: 7277790
    Abstract: This invention detects the crank angle location where combustion switches from premixed to diffusion, referred to as the transition index, and uses that location to define integration limits that measure the portions of heat released during the combustion process that occur during the premixed and diffusion phases. Those integrated premixed and diffusion values are used to develop a metric referred to as the combustion index. The combustion index is defined as the integrated diffusion contribution divided by the integrated premixed contribution. As the EGR rate is increased enough to enter the low temperature combustion regime, PM emissions decrease because more of the combustion process is occurring over the premixed portion of the heat release rate profile and the diffusion portion has been significantly reduced. This information is used to detect when the engine is or is not operating in a low temperature combustion mode and provides that feedback to an engine control algorithm.
    Type: Grant
    Filed: April 25, 2006
    Date of Patent: October 2, 2007
    Assignee: UT-Battelle, LLC
    Inventors: Johney Boyd Green, Jr., Charles Stuart Daw, Robert Milton Wagner
  • Patent number: 7081745
    Abstract: A paramagnetic oxygen sensor and method employs a pressure sensor having a membrane extending through an air gap for a magnetic field. A piezoelectric element is mounted on the membrane. Gas chambers are formed on either side of the membrane. The gas mixture, the properties of which are to be measured, is supplied to one of the chambers. A reference gas is applied to the other chamber. A pulsating magnetic field is provided across the air gap and through the chambers containing the gas mixture and reference gas. The differing responses of the gas mixture and reference gas to the magnetic field deflect the membrane. The deflection of the membrane is sensed by the piezoelectric element. The piezoelectric element maybe operated either in a passive mode or active mode to sense the deflection of the membrane.
    Type: Grant
    Filed: March 14, 2003
    Date of Patent: July 25, 2006
    Assignee: GE Healthcare Finland Oy
    Inventor: Heikki Haveri
  • Patent number: 7059173
    Abstract: A system suitable for conducting an on-site measurement of the density and/or R-value of a gas-permeable material, comprising: a device comprising: a chamber comprising a first port and a second port; a diffuser in fluid communication with the second port of the chamber, wherein the diffuser comprises a diffuser port for conveying a gas flow to or from a gas-permeable material, and wherein the area of the diffuser port is greater than the area of the second port; and a pressure sensor arranged to measure the pressure in the chamber; and an analyzer for determining the density and/or R-value of the gas-permeable material based on pressure measurements obtained by the pressure sensor.
    Type: Grant
    Filed: June 7, 2004
    Date of Patent: June 13, 2006
    Assignee: Johns Nanville
    Inventors: Francis J. Babineau, Jr., Brandon Dillan Tinianov, Thomas John Fellinger, Angela Robin Bratsch
  • Patent number: 7055370
    Abstract: A device suitable for conducting an on-site measurement of the density and/or R-value of a gas-permeable material is provided. The device comprises a chamber comprising a first port and a second port; a diffuser in fluid communication with the second port of the chamber, wherein the diffuser comprises a diffuser port for conveying a gas flow to or from a gas-permeable material, and wherein the area of the diffuser port is greater than the area of the second port; and a pressure sensor arranged to measure the pressure in the chamber.
    Type: Grant
    Filed: June 7, 2004
    Date of Patent: June 6, 2006
    Assignee: Johns Manville
    Inventors: Brandon Dillan Tinianov, Francis J. Babineau, Jr., Thomas John Fellinger, Angela Robin Bratsch
  • Patent number: 7055371
    Abstract: A device suitable for conducting an on-site measurement of the density and/or R-value of a gas-permeable material is provided, comprising: a chamber comprising a first port and a second port; a diffuser in fluid communication with the second port of the chamber, wherein the diffuser comprises a diffuser port for conveying a gas flow to or from a gas-permeable material, and wherein the area of the diffuser port is greater than the area of the second port; a pressure sensor arranged to measure the pressure in the chamber; a temperature sensor arranged to measure the temperature of a gas in the chamber; and a relative humidity sensor arranged to measure the relative humidity in the chamber.
    Type: Grant
    Filed: June 7, 2004
    Date of Patent: June 6, 2006
    Assignee: Johns Manville
    Inventors: Francis J. Babineau, Jr., Brandon Dillan Tinianov, Thomas John Fellinger, Angela Robin Bratsch
  • Publication number: 20020192831
    Abstract: A method of controlling the hydrocarbon content of a possible explosive mixture of air/hydrocarbon vapor circulating from an intake point into an installation fitted with a vapor intake system comprising a vapor intake circuit incorporating a suction pump enabling vapor to be circulated at a vapor flow rate QV. A device is connected to the vapor intake circuit to determine the hydrocarbon content of the aspirated vapor comprising a combination of a flow meter on the one hand and a sensor for measuring relative pressure by reference to atmospheric pressure PA on the other. The hydrocarbon content of the vapor circulating in the vapor intake circuit is determined by taking account of the density and the viscosity of this vapor, which is derived on the basis of a characteristic linked to the loss in air pressure previously stored in memory.
    Type: Application
    Filed: January 30, 2002
    Publication date: December 19, 2002
    Inventor: Jacques Fournier
  • Patent number: 6367308
    Abstract: A method of measuring the density of a dielectric gas under pressure in a buried metal-clad electricity line consists in measuring the pressure and the temperature of the dielectric gas by means of a sensor mounted on the case of the line, and in compensating the pressure measurement as a function of the temperature measurement using constant density curves that have been corrected on the basis of a curve representing the difference between the temperature at the surface of the case of the line and the mean temperature of the gas inside the line for increasing amounts of current carried by the line conductor.
    Type: Grant
    Filed: December 17, 1999
    Date of Patent: April 9, 2002
    Assignee: Alstom
    Inventor: Jean Marmonier
  • Patent number: 6286361
    Abstract: An apparatus for detecting pressure in a hollow fan blade of a turbofan gas turbine engine comprises a magnetostriction transducer arranged in a sub chamber of the fan blade which is interconnected to a main chamber. A magnetic coil is arranged in the fan casing of the turbofan remote from the fan blade, and an alternating current is supplied from a supply to the magnetic coil to produce an alternating magnetic field. The alternating magnetic field causes the magnetostriction transducer to generate vibrations in the fan blade and the magnetostriction transducer. A magnetic search coil detects changes in the magnetic field, which corresponds to the vibrations, and a processor analyses the vibrations to determine if there has been a change in the resonant frequency of the vibrations which is indicative of a change in the pressure in the fan blade. The processor supplies a signal to a display or to an alarm. The change in the pressure is indicative that the fan blade is cracked and needs replacing.
    Type: Grant
    Filed: January 5, 1998
    Date of Patent: September 11, 2001
    Assignee: Rolls-Royce plc
    Inventors: Alan R Jones, John R Webster, Ian D Brown, Duncan Pollard, Rodney D Greenough
  • Patent number: 6263914
    Abstract: A density monitoring assembly for use in monitoring the gas density within a high voltage circuit breaker tank is disclosed. The density monitoring assembly is coupled directly to an exterior surface of said tank and provides electrical signals indicative of the density of gas within the tank. The assembly comprises a cover that encloses the density monitoring device. The device itself is used to retain the cover. A ball valve and a shraeder type valve are provided to allow testing of the device.
    Type: Grant
    Filed: April 9, 1999
    Date of Patent: July 24, 2001
    Assignee: ABB Power T&D Company Inc.
    Inventors: Jeffry R. Meyer, Willie B. Freeman
  • Patent number: 6205846
    Abstract: In the method, pairs of pressure and temperature values are recorded using a pressure sensor and a temperature sensor fixed to a case from the outside and communicating with a dielectric gas, thereby enabling a density value to be calculated for the dielectric gas corresponding to each recorded pair of values. Simultaneously with making the pressure and temperature records, an electric current flowing through an electrical apparatus located inside the case and a climate parameter relating to the medium in which the case is located are also recorded for the purpose of giving each density value an index, thereby enabling a leakage rate to be determined with improved accuracy on the basis of indexed leakage rates, each of which is obtained from density values all having the same index.
    Type: Grant
    Filed: October 22, 1998
    Date of Patent: March 27, 2001
    Assignee: GEC Alsthom T&D SA
    Inventors: Jean-Pierre Dupraz, Edmond Thuries