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| Number | Title | Issue Date |
| 8150637 | Gas lift well surveillance Apparatuses, methods, and computer program products for evaluating the performance of a gas lift well are disclosed. A gas lift well surveillance kit is disclosed. A method for evaluating the performance of a gas lift well includes injecting a tracer into an annulus... | 04/03/2012 |
| 8116992 | Apparatus and method for determining solids circulation rate The invention relates to a method of determining bed velocity and solids circulation rate in a standpipe experiencing a moving packed bed flow, such as the in the standpipe section of a circulating bed fluidized reactor The method utilizes in-situ measurement of dif... | 02/14/2012 |
| 7983856 | Flow meter A simple, passive and rugged device for measuring the flow rate of liquid. A variable area obstruction valve, a differential pressure sensor and a densitometer are combined in a single housing to provide for a highly accurate and precise measure of mass flow. ... | 07/19/2011 |
| 7925457 | Flow meter and airflow measurement using an airfoil One embodiment provides a flow meter including an airfoil movably secured in the airflow path of a fan in an electronic system. The airfoil is configured to generate a lift component in response to the airflow. A sensor engages the airfoil and generates a signal in ... | 04/12/2011 |
| 7904257 | Flow verification system and flow verification method A flow verification system is adapted to verify flow characteristics just after a flow control device starts flow control by verifying a flow rate in a gas piping system which includes a first cutoff valve, the flow control device installed downstream from the first... | 03/08/2011 |
| 7881885 | Method and device for determining the instantaneous mass flow of pulsating flows The invention relates to a method for determining the instantaneous rate of the mass flow of a flow of a fluid pulsating periodically at a frequency f, said method comprising the following steps: a) a pressure gradient in the flow over a certain period (P) is determ... | 02/01/2011 |
| 7881886 | Methods for performing transient flow prediction and verification using discharge coefficients A method for determining an actual gas flow rate as gas flows through a gas flow delivery system is provided. The method includes sending the gas through the gas flow delivery system into a gas conduit, wherein a section of the gas conduit is widened to form an orif... | 02/01/2011 |
| 7860668 | Pressure measurement using a MEMS device A device to measure pressure is disclosed. In one embodiment, the device includes at least one element with two layers separated by a space which changes over a variable time period in response to a voltage applied across the two layers. The time period may be measu... | 12/28/2010 |
| 7853416 | Flow rate verification failure diagnosis apparatus, flow rate verification failure diagnosis system, flow rate verification failure diagnosis method, and control program product for flow rate verification failure diagnosis A flow rate verification failure diagnosis apparatus is applied to a gas supply pipe system including flow rate control devices and a flow rate verification unit for detecting flow rate abnormality by measuring flow rate of each of the flow rate control devices on t... | 12/14/2010 |
| 7801691 | Method for acquisition and processing of an intake pressure signal in an internal combustion engine without an intake manifold Method of acquisition and processing of an intake pressure signal in an internal combustion engine without an intake manifold; the internal combustion engine having at least one cylinder that receives fresh air through an intake duct, which is controlled by a butter... | 09/21/2010 |
| 7672796 | Method to evaluate a performance of a control valve and a system thereof A method for providing a system for establishing a control valve performance in a process operation. The system includes establishing an expected flow rate for a control valve by measuring a differential pressure between an upstream and downstream position of a cont... | 03/02/2010 |
| 7664609 | Device for impact sensing having at least two pressure sensors A device for impact sensing having at least two pressure sensors is described, where pressure values are communicated from the pressure sensors to a processor, and the processor performs impact sensing on the basis of the pressure value. The processor communicates t... | 02/16/2010 |
| 7623976 | System of distributed configurable flowmeters A system of one or more configurable flowmeters allows an individual, locally or remotely, to selectively activate one or more functions of the flowmeters. The individual is capable of selecting which parameter of the process flow that the flowmeter is to measure, t... | 11/24/2009 |
| 7584063 | Multivariable transmitter and computation processing method of the same A multivariable transmitter has a microprocessor for executing a computation processing task such as calculating a differential pressure value and static pressure with using a plurality of physical quantity signals. The microprocessor executes a processing for obtai... | 09/01/2009 |
| 7519483 | Unsteady flow meter The invention makes it possible to measure, in real time, the flow of a fluid that is incompressible while having an unsteady flow. The pressure measuring system is primarily comprised of a negative-pressure element (1) placed within the flow and provided wit... | 04/14/2009 |
| 7406387 | Apparatus and method for detecting blockage of impulse lines A detecting apparatus includes the following units. A pressure detecting unit detects in time series higher and lower static pressures and a differential pressure. Fluctuation calculating units calculate time series data sets of a differential pressure fluctuation, ... | 07/29/2008 |
| 7403862 | Method for operating a process-measuring device The process measuring device comprises a flow sensor having a measuring tube, a sensor arrangement for producing a measurement signal, and an evaluation and operating circuit. The method serves to compensate for the effects of interfering potentials which are caused... | 07/22/2008 |
| 7383150 | Diving computer with programmable display A diving computer is provided. The diving computer includes a computer connected to a dot matrix screen to display information concerning a dive. The computer has an interface to an external personal computer for reprogrammably configuring the information displayed ... | 06/03/2008 |
| 7363193 | Safety management system and method A safety management system includes a processor and memory in which a safety database is maintained. The safety management system receives safety data from one or more portable devices and/or computers, and the system stores this safety data in the database. When a ... | 04/22/2008 |
| 7342504 | Monitoring system and method A monitoring system includes one or more monitoring devices, positioned in sewer manholes, storm drains, etc., and a remote monitoring station that communicates wirelessly therewith. The monitoring device may be an integrated unit, including sensors, a two-way telem... | 03/11/2008 |
| 7334484 | Line pressure measurement using differential pressure sensor A pressure sensor assembly for sensing a pressure of a process fluid includes a sensor body having a cavity formed therein to couple to a process fluid pressure. A deflectable diaphragm in the cavity deflects in response to the first and second process fluid pressur... | 02/26/2008 |
| 7333899 | Fluid flow rate sensor and method of operation A thermo-anemometer-type fluid flow rate sensor design and a method for its operation that overcome the response time limitations of prior known fluid flow rate sensors is disclosed. The fluid flow rate sensor includes a probe having a detection module adapted to ch... | 02/19/2008 |
| 7321833 | Fluid flow rate sensor A valve body defines an inlet, an outlet, a valving cavity disposed between the inlet and outlet and a valving surface between the inlet and the outlet. A valve is moveable to a position away from the valving surface for permitting flow from the inlet through the va... | 01/22/2008 |
| 7321846 | Two-wire process control loop diagnostics A diagnostic device for coupling to a process control loop includes digital communication circuitry configured to receive a digital communication signal from the process control loop. The digital communication signal is a digitally modulated analog signal on the pro... | 01/22/2008 |
| 7310582 | Electromagnetic flow meter with reduced power consumption and reduced exciting current An electromagnetic flow meter of a switching control system in which a DC voltage is applied to an exciting coil via switching elements, a direction of an exciting current flowing through the exciting coil is switched over at a predetermined excitation timing, and t... | 12/18/2007 |
| 7305868 | Method and system for evaluating lyophobicity of inner wall of fine tube including lyophobic film A method for evaluating lyophobicity of an inner wall of a fine tube having a lyophobic film formed on the inner wall includes a step of setting up a fine tube having a lyophobic film extending from an end of the inner wall of the fine tube to a predetermined positi... | 12/11/2007 |
| 7295934 | Flow meter performance monitoring system Apparatus and associated systems, methods and computer program products relate to monitoring the performance of an operating gas meter by automatic and substantially continuous differential pressure (dP) measurement. Measured dP may be compared against a baseline dP... | 11/13/2007 |
| 7290450 | Process diagnostics A diagnostic device for use in a industrial process includes monitoring electronics or diagnostic circuitry configured to diagnose or identify a condition or other occurrence in the industrial process. The system can be implemented in a process device such as a flow... | 11/06/2007 |
| 7286945 | Apparatus and method for identifying possible defect indicators for a valve A method, apparatus, and computer program are provided for identifying possible indicators of a defective valve. The method, apparatus, and computer program decompose a signal having a plurality of process variable measurements into a plurality of resolution levels.... | 10/23/2007 |
| 7272531 | Aggregation of asset use indices within a process plant A method of monitoring an entity within a process plant wherein the entity includes a plurality of lower level entities, includes acquiring a plurality of use indices, acquiring a plurality of weighting values, and creating an aggregate use index from a combination ... | 09/18/2007 |
| 7266427 | Intelligent valve flow linearization A feed-forward flow controller is designed to calculate a target valve position from a target flow. Correction is made for liquid or gas pressure drop across the valve and for the valve flow modulating member geometry. This feed-forward action may also be used to li... | 09/04/2007 |
| 7263448 | Continuous flow chemical metering apparatus A continuous flow chemical metering apparatus includes a measuring vessel adapted to hold a column of fluid, a sensor for determining head pressure and a processor to establish calibration data regarding the relationship between head pressure and a height of the col... | 08/28/2007 |
| 7257501 | Apparatus and method for identifying informative data in a process control environment A method includes identifying a signal and a disturbance using historical data associated with one or more process variables. The method also includes decomposing the signal and the disturbance at a plurality of resolution levels. The method further includes identif... | 08/14/2007 |
| 7254485 | Soil and topography surveying Methods of characterizing subsurface conditions in a selected geographic region previously associated as a whole with a specific subsurface material characteristic reference profile such as from a USDA-NRCS soil survey. The method includes deploying a sensing tool a... | 08/07/2007 |
| 7254493 | Pressure transducer based fluid velocity sensor The invention consists of a pressure transducer based air velocity sensor that has been optimized for use in metal ducts. The fluid flow velocity is determined by measuring the propagation delay of a direct path pressure wave signal transmitted through the fluid as ... | 08/07/2007 |
| 7253680 | Amplifier system with current-mode servo feedback A system and method for compensating an amplifier apparatus for low frequency and/or DC components of an externally applied input signal as well as for any voltage offsets contributed by the amplifier circuitry. Band-limited servo feedback is applied to predetermine... | 08/07/2007 |
| 7254518 | Pressure transmitter with diagnostics In one embodiment, a pressure transmitter is provided which diagnoses the condition of a primary element and/or an impulse line which connects to a pressure sensor. A difference circuit coupled to the pressure sensor has a difference output which represents the sens... | 08/07/2007 |
| 7234450 | Gas density ratio detector, gas concentration detector, and fuel vapor treatment apparatus When a gas flow producer is driven, plural kinds of gases flow into a measure-passage at respective timing. An orifice is provided in the measure-passage. The orifice has a diameter-changing portion which restricts a separation of gases from an inner surface of the ... | 06/26/2007 |
| 7231305 | Flow rate determination A method for determining the bubble point pressure and the true flow rate of a fluid in a flow line of a flowing well is provided, wherein the method includes modifying fluid pressure in a predetermined region of the flow line, generating pressure data responsive to... | 06/12/2007 |
| 7225085 | Precision gas flow meter A precision gas flow meter that is capable of measuring small flow rates of gasses precisely in the range of 0.01 to 10 L per minute. The meter is designed to measure the gas flow in small volume increments of predetermined value, and therefore can be used to measur... | 05/29/2007 |
