Abstract: The present invention provides a subsea apparatus for testing a hydraulic signature which has a fluid supply, a first pressure line coupled to the fluid supply, a second pressure line coupled to the fluid supply; and a pressure recording device operatively coupled to both the first pressure line and the second pressure line. A pressure recording device is capable of storing pre-determined pressure data representative of said pressure lines. The first pressure line functions at a lower pressure than the second pressure line while a pressure recording device records data to allow comparison of actual pressure data on the first and second pressure lines with said stored data.

Abstract: The present invention is a hand held gauge for use with refrigeration systems. The gauge includes a service port connector, a display screen, and user interfacing buttons. The gauge also includes electronic storage of the pressure-to-saturation temperature data for different refrigerants. The gauge allows for the measuring of temperature and pressure of refrigeration systems. After a user inputs a refrigerant type, the gauge uses the pressure and the saturation data to determine the saturation temperature. The saturation temperature is compared to the measured temperature to get the superheat or subcooling. These results may all be displayed on the display screen.

Abstract: A capacitive occupant sensor includes a sensor mat having a base member and a main electrode arranged on the base member. The main electrode has a first electrode, and a second electrode to cover the first electrode. The second electrode is cheaper than the first electrode. The base member is constructed by U-parts, and an opening of the U-part is defined to be surrounded by two extending portions and a bent portion connecting the extending portions. The first electrode is located adjacent to the opening, when the first electrode is patterned on the bent portion.

Abstract: An air data sensor device using a flow around a cylinder is provided. The air data sensor device may include a sensor measurement unit which includes a sensor body provided in a cylindrical form including a hollow inside, a plurality of pressure measurement holes disposed on an outside of the sensor body, and a thermostat attached to one side of the sensor body, and a signal processing unit which includes a pressure sensor connected to the plurality of pressure measurement holes, and a microprocessor connected to the pressure sensor to perform calculation. A main pressure measurement hole having a high pressure value may be selected from the plurality of pressure measurement holes, pressure distribution may be calculated, and at least one of an angle of attack, a static pressure, and a total pressure may be calculated using the pressure distribution.

Abstract: The invention is a method for monitoring an amount of gas available in a cryosurgical system used for conducting a cryosurgical procedure. Based on information pertaining to a planned cryosurgical procedure, cryoprobe-specific information for each cryoprobe connected to the cryosurgical system, the specified volumetric capacity of a cryogas source, and measured pressure of the gas in the cryogas source, the method determines the mass flow rates of gas flowing through each cryoprobe, the total mass flow rate of the gas through the cryosurgical system, and the mass of the gas in the cryogas source at standard atmospheric conditions. The amount of time available for completing the cryosurgical procedure before the cryogas source is expended is determined as the arithmetic ratio of the mass of the gas in the cryogas source to the total mass flow rate of the gas through the cryosurgical system.

Abstract: A method for controlling the influx of fluids into a multizone well in which each inflow zone is provided with an inflow control device, comprises: assessing the flux of oil, gas, water and other effluents from the well; monitoring production variables, including ICD position and/or fluid pressure in each inflow zone upstream of each ICD and/or downstream of each ICD; sequentially adjusting the position of each of the ICDs and assessing the flux of crude oil, natural gas and/or other well effluents; monitoring production variables; deriving a zonal production estimation model for each inflow zone of the well; and adjusting each ICD to control the influx of crude oil, natural gas and/or other effluents into each inflow zone on the basis of data derived from the zonal production estimation model for each inflow zone of the well.

Abstract: A method for providing a characteristic quantity for a state of an air system of a supercharged internal combustion engine includes: detecting a characteristic quantity measured value as characteristic quantity information with the aid of a sensor; providing a characteristic quantity model, using which a characteristic quantity model value is computed on the basis of one or more quantities different from the characteristic quantity measured value; and providing the characteristic quantity either based on the characteristic quantity measured value or on the characteristic quantity model value computed by the characteristic quantity model, as a function of a state of the air system.

Abstract: An extremely high water cut oil-gas-water three phase flow water removing device, which includes a mist eliminator (8), a fluid rectifier (7), a liquid collection chamber (2), a fluid directing duct (5), an inlet connection pipe section (10), a gas outlet connection pipe section (9), a mixture liquid exit connection pipe section (4), a free water outlet connection pipe section (1). Its function is to effectively remove most of the free water from the high water cut oil-air-water three phase flow mixture liquid. An extremely high water cut oil-air-water three phase flow measurement apparatus and a measurement method using the water removing device are also disclosed.

Abstract: An in-situ gas flow measurement controller measures the temperature and rate of pressure drop upstream from a flow control device (FCD). The controller samples the pressure and temperature data and applies the equivalent of a decimating filter to the data to produce filtered data at a slower sampling rate. The controller derives timestamps by counting ticks from the sampling clock of the A/D converter that is sampling the pressure at regular intervals to ensure the timestamps associated with the pressure samples are accurate and do not contain jitter that is associated with software clocks. The controller additionally normalizes the temperature reading to account for power supply fluctuations, filters out noise from the pressure and temperature readings, and excludes data during periods of instability. It calculates the gas flow rate accounting for possible non-linearities in the pressure measurements, and provides the computed gas flow measurement via one of many possible interfaces.

Abstract: An in-situ gas flow measurement controller measures the temperature and rate of pressure drop upstream from a flow control device (FCD). The controller samples the pressure and temperature data and applies the equivalent of a decimating filter to the data to produce filtered data at a slower sampling rate. The controller derives timestamps by counting ticks from the sampling clock of the A/D converter that is sampling the pressure at regular intervals to ensure the timestamps associated with the pressure samples are accurate and do not contain jitter that is associated with software clocks. The controller additionally normalizes the temperature reading to account for power supply fluctuations, filters out noise from the pressure and temperature readings, and excludes data during periods of instability. It calculates the gas flow rate accounting for possible non-linearities in the pressure measurements, and provides the computed gas flow measurement via one of many possible interfaces.

Abstract: The invention relates to meter electronics (20) for vibratory flowmeter friction compensation is provided. The meter electronics (20) includes an interface (201) configured to communicate with a flowmeter assembly (10) of a vibratory flowmeter (5) and receive a vibrational response and a processing system (203) coupled to the interface (201) and configured to measure a mass flow rate of a fluid using the vibrational response. The processing system (203) is configured to determine a fluid velocity (V) using the mass flow rate, a fluid density (?), and a cross-sectional flow area (A), determine a friction factor (f) using the fluid velocity (V) and a pressure drop (?P), and determine a compensation factor using the friction factor (f). The invention also relates to a vibratory flowmeter compensation method.

Abstract: An in-situ gas flow measurement controller measures the temperature and rate of pressure drop upstream from a flow control device (FCD). The controller samples the pressure and temperature data and applies the equivalent of a decimating filter to the data to produce filtered data at a slower sampling rate. The controller derives timestamps by counting ticks from the sampling clock of the A/D converter that is sampling the pressure at regular intervals to ensure the timestamps associated with the pressure samples are accurate and do not contain jitter that is associated with software clocks. The controller additionally normalizes the temperature reading to account for power supply fluctuations, filters out noise from the pressure and temperature readings, and excludes data during periods of instability. It calculates the gas flow rate accounting for possible non-linearities in the pressure measurements, and provides the computed gas flow measurement via one of many possible interfaces.

Abstract: 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.

Abstract: A motion controller includes a handle and a MEMS pressure sensing module. The handle has an output interface circuit for coupling with a terminal electronic device. The MEMS pressure sensing module includes a compressible member mounted on the handle, a MEMS sensor for sensing a pressure applied on the compressible member and converting the pressure into electronic signals, a processing unit for calculating a value of the pressure according to the electronic signals, and a power supply unit for supplying power to the processing unit. The processing unit is connected with the output interface circuit such that a user is able to obtain the pressure value from the terminal electronic apparatus.

Abstract: A thermal inspection system includes a fluid source configured to supply a warm flow and a cool flow, indirectly or directly, to internal passage(s) of a component. The system includes an imager configured to capture a time series of images corresponding to a transient thermal response of the component to the warm and cool flows. The system further includes at least one flow meter configured to measure the warm and cool flows supplied to the component and a processor operably connected to the imager. The processor determines the transient thermal response of the component around a transition time. The flow supplied to the component switches from the warm flow to the cool flow at the transition time. The processor compares the transient thermal response around the transition time with one or more baseline values or with an acceptable range of values to determine if the component meets a desired specification.

Abstract: Presented herein are a system and method (i.e., utilities) for monitoring the flow of materials used to mark road surfaces and other surfaces. The utilities utilize one or more pressure sensors to monitor in-line pressure of road marking material to determine the amount of material being applied. Electronic equipment receives signals from the pressure sensors, temperature sensors and/or additional monitoring equipment to generate an output indicative of an amount of material flow. In a further arrangement, the equipment generates an output indicative of a thickness of the read marking material as applied to a surface.

Abstract: A method and apparatus for determining a fluid level and/or output flow during operation of a centrifugal pump, are provided, which may be used for production of gas and/or oil from a well, and include a vector feedback model to derive values of torque and speed from signals indicative of instantaneous current and voltage drawn by the pump motor, a pump model which derives values of the fluid flow rate and the head pressure for the pump from torque and speed inputs, a pumping system model that derives, from the estimated values of the pump operating parameters, an estimated value of fluid level and other pumping system parameters. Controllers responsive to the estimated values of the pumping system parameters control the pump to maintain fluid level at the pump input, near an optimum level, or within a safe operating range and/or output flow from the pump.

Abstract: A flow rate sensor is disclosed, comprising a flow rate calculation part that calculates a flow rate of a fluid based on an expression using Xd/Xu that satisfies an expression at least in a certain range of the flow rate when an output of a constant temperature control circuit corresponding to an upstream resistor is defined as Vu, an output of a constant temperature control circuit corresponding to a downstream resistor is defined as Vd, and the flow rate is defined as and the flow rate calculation part corrects the zero point output as being an output when the flow rate is zero by using a zero offset function (OFS) defined as a function of Vu+VdXd/Xu.

Abstract: An apparatus for measuring a flow rate of a two-phase fluid flowing within a conduit includes a chamber having at least one transparent wall in fluid communication with the conduit; a high-speed imaging system in visual communication with the at least one transparent wall; a thermocouple and a pressure transducer for obtaining a temperature value and a pressure value of the two-phase fluid flowing within the conduit; and a processor for determining the flow rate of the two-phase fluid by analyzing the images obtained by the high-speed imaging system, and from the temperature and pressure values for the two-phase fluid flowing within the conduit. A process is provided for determining the flow rate of a two-phase fluid flowing within the conduit.

Abstract: A constant-flow control valve and BTU meter assembly that has a pressure independent, constant-flow control valve assembly connectable to the fluid-based heating or cooling system. A valve stem is connected to a valve member and is rotatable as a unit relative to a valve body to change the position of valve member to change a fluid flow rate through the valve. The valve member's position relative to the fluid path is directly related to the fluid flow rate. A BTU meter assembly is connected to the valve stem, which is rotatable relative to the BTU meter assembly. A position sensor of the BTU meter assembly detects a rotational position of the valve stem relative to the BTU body. A controller of the BTU meter assembly determines the fluid flow rate based upon the pressure drop across the valve assembly and the rotational position of the valve stem.

Abstract: An apparatus is provided. The apparatus comprises a digital signal generator, an analog filter, an amplitude modulator, and an analog-to-digital converter (ADC). The digital signal generator has a demodulator and provides a digital excitation signal. The analog filter is coupled to the digital signal generator. The amplitude modulator has a variable capacitor and is coupled to the analog filter. The amplitude modulator also generates an amplitude modulated signal with an amplitude that is a function of the capacitance of the variable capacitor. The ADC is coupled to the amplitude modulator and the demodulator, and the digital signal generator and the demodulator operate synchronously.

Abstract: A method and system for monitoring component integrity are provided. The system includes a flow monitoring system includes one or more sensors configured to generate a signal representative of a flow through a component, a signals representative of a pressure of a fluid at a location upstream of a component, a pressure of the fluid at a location downstream of the component; and a temperature of the fluid at the component and a processor programmed to determine a value indicative of a density of the fluid at the component using the temperature, determine a value indicative of an equivalent resistance to flow at the component using the generated signals and the determined density, and output the determined equivalent resistance to flow value.

Abstract: A system for determining air propagation rate through a pneumatically-controlled braking arrangement of a train, the braking arrangement having a controller for adjusting air pressure of air transmitted through a brake pipe from a lead locomotive to a rear railcar, the system including: a lead device positioned on the lead locomotive and configured to associate first time data with first air pressure data sensed in the brake pipe at a first position; a rear device positioned on the rear railcar and configured to associate second time data with second air pressure data sensed in the brake pipe at a second position; and a control device configured to determine air propagation data based at least partially upon at least one of the following: first time data, first air pressure data, the first position, second time data, second air pressure data, the second position, or any combination thereof.

Abstract: A method and system for monitoring and predicting failure in pumps on operating vehicles is disclosed. The method may comprise measuring a plurality of a pressure drops across an orifice in a case drain line of a vehicle operating in drive gear, determining an actual case drain flow rate for each measured pressure drop, selecting a plurality of the actual case drain flow rates, estimating for each selected actual case drain flow rate an estimated flow rate for the case drain line and displaying the difference between the actual case drain flow rate and the estimated flow rate for each selected actual case drain flow rate.

Abstract: A method for determining characteristic values of an electrometrically driven centrifugal pump assembly with a speed controller, said assembly being integrated in an installation, includes determining characteristic values by way of electrical variables of the motor and of the pressure produced by the pump, with which one successively runs to at least two different operating points of the pump. Delivery rates are determined in the installation at the run-to operating points, and the characteristic values are determined based on the delivery rates.

Abstract: A failure diagnosis apparatus for an exhaust pressure sensor for detecting the exhaust pressure in an exhaust gas recirculation passage which connects an exhaust passage and an intake passage of an internal combustion engine. A first preliminary determination that the exhaust pressure sensor is normal, is made when the engine is in a predetermined low load operating condition and a difference between the detected exhaust pressure and the atmospheric pressure is equal to or less than a first determination threshold value. A second preliminary determination that the exhaust pressure sensor is normal, is made when the engine is in a predetermined high load operating condition and the difference between the exhaust pressure detected by the exhaust pressure sensor and the atmospheric pressure is equal to or greater than a second determination threshold value. A final determination that the exhaust pressure sensor is normal, is made when both of the first and second preliminary determinations are made.

Abstract: An airflow measurement system configured to be received in a duct of a heating, ventilating and air conditioning (HVAC) system is provided. The air flow measurement system includes a housing, and a plurality of cells positioned in the housing, the plurality of cells being configured such that air flows through the plurality of cells when the flow measurement system is positioned in the duct of the HVAC system, wherein at least one of the cells includes a self-heated thermistor.

Abstract: A method determines an injection law of a fuel injector to be tested in an injection system and includes steps of: completely interrupting feeding of fuel from a fuel pump to a common rail; avoiding opening of all injectors except for one to be tested; measuring initial pressure of the fuel inside the rail before starting the opening of the injector; opening the injector for consecutive openings with a same test-actuation time; measuring final pressure after ending the opening; determining a pressure drop in the rail during the opening (equal to a difference between the initial and final pressures); estimating, according to the pressure drop, a fuel quantity that is actually injected by the injector when the injector is opened for the time; and causing an internal-combustion engine using the system to rotate by an external actuator during the openings to allow execution of consecutive openings with the same time.

Abstract: Systems, devices, and methods to mitigate the pressure disturbance associated with the injection of low-pressure analyte samples into a high-pressure HPLC fluid stream, to enhance chromatographic performance related to retention time and reproducibility. The preferred embodiment coordinates the injection run with active pressure control of a binary solvent delivery system to virtually eliminate the customary pressure drop when the low-pressure loop is brought on line. An additional benefit that enhances reproducibility is accomplished by forcing a consistent timing relationship between the injection run, the mechanical position of the delivery pump pistons, and the start and subsequent gradient delivery.

Abstract: A time remaining display assembly for indicating the time remaining in a pressurized gas tank, adapted to be connected to a regulator having a flow rate adjuster for selecting one of a plurality of flow rate settings comprising an assembly coupled to the flow rate adjuster, the assembly having one or more time scales imprinted thereon, each time scale corresponding to one of the flow rate settings, each time scale indicating the time remaining in the tank as a function of gas pressure in the tank.

Abstract: 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, measuring a concentration of the tracer present in a substance retrieved from the well, determining actual travel times of the tracer, segmenting the gas lift well into a plurality of ranges of well depth, determining lift gas loss parameters, calculating lift gas velocities in the annulus and in the production tubing for each of the plurality of ranges of well depth based on the lift gas loss parameters, and determining points of entry of the lift gas into the production tubing based on: (i) the actual travel times of the tracer, and (ii) the lift gas velocities in the annulus and in the production tubing.

Abstract: A capacitive occupant sensor includes a sensor mat having U-parts arranged in a first direction and, a second direction perpendicular to each other. The U-parts located adjacent to each other are connected in the second direction so as to define S-parts, in a manner that openings of the U-parts alternately open toward a first side of the first direction or a second side of the first direction. The S-parts located adjacent to each other are combined in the first direction, in a manner that the opening open toward the first side and the opening open toward the second side oppose to each other in the first direction. The mat has a meandering structure defined by the S-parts.

Abstract: The present invention provides a new method and apparatus for receiving signals containing information about a plurality of velocity profiles of a flow in a pipe and about a pressure gradient of the flow over a length of the pipe; and determining information about an injection of a chemical into the flow in the pipe based at least partly on the information contained in the signals.

Abstract: A pressure gauge for determining at least one pressure value describing a pressure of a fluid flowing in a pulsating manner in a phase of the pulsating flow, includes a pulse wave characterizer. The pulse wave characterizer is configured to obtain transmit time information of a pulse wave, and amplitude information of the pulse wave. The pressure gauge additionally includes a pressure value determiner configured to obtain a first pressure value describing a pressure of the fluid in a first phase, on the basis of the transmit time information and while using a mapping. The pressure value determiner is further configured to obtain a second pressure value describing a pressure of the fluid in a second phase, on the basis of the first pressure value and the amplitude information while using a mapping.

Abstract: Transmission of probe configuration data is initiated upon recognition by the probe of a prescribed condition. Probe configuration data protocol includes a data frame, subdivided into a desired number of time slots. Unlike measurement data protocol, where inter-pulse pair timing within a slot varies based on a magnet position or temperature sensor resistance, configuration data protocol in accordance with the invention uses fixed inter-pulse timing to represent the various states of digital data. In such manner, at least a portion of the time slots making up the particular data frame can be used for containing data sent from the probe, and which can then be interpreted by the receiving processing device as at least one bit of binary code allocated to each individual slot of the portion of time slots.

Abstract: An apparatus automatically carries out an integrity test on a filter device having a fluid inlet, a fluid outlet and a venting port. The apparatus includes a filter integrity testing device having a pressure sensor and/or a flowmeter. An inlet connector is connectable to the fluid inlet, is connected via a wetting liquid supply valve to a wetting liquid supply, and is connected via a drainage valve to a first drain. An outlet connector is connectable to the fluid outlet and via an outlet valve to the first or a second drain. A venting port connector is connectable to the venting port and via a measurement valve to the pressure sensor and/or flowmeter. The venting port connector also is connected via a venting valve to a venting pipe, and via a measurement gas valve to a measurement gas source. The valves are controlled by the filter integrity testing device.

Abstract: A differential pressure sensor (105) for determining a differential pressure value is provided. The differential pressure sensor (105) includes a selector valve (110) configured to receive a first pressure at a first location and a second pressure at a second location that is spaced-apart from the first location, a single-sided pressure sensor (120) coupled to the selector valve (110) and receiving either the first pressure or the second pressure, and a processing system (130) coupled to the single-sided pressure sensor (120) and configured to receive one or more first single-sided pressure measurements from the single-sided pressure sensor (120), subsequently receive one or more second single-sided pressure measurements from the single-sided pressure sensor (120), and generate the differential pressure value from the one or more first single-sided pressure measurements and the one or more second single-sided pressure measurements.

Abstract: A mass-airflow measurement conversion apparatus for internal combustion engine carburetors includes a plurality of pressure sensors disposed at different location along an air intake path of an internal combustion engine, each sensor adapted to sense a pressure of air flowing into the internal combustion engine and output an electrical signal as a pressure signal corresponding to the sensed air pressure; and a calculation section which receives the pressure signals and generates a mass air flow signal as an output signal based on the received pressure signals.

Abstract: 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 differential pressure over known axial lengths of the standpipe in conjunction with in-situ gas velocity measurement for a novel application of Ergun equations allowing determination of standpipe void fraction and moving packed bed velocity. The method takes advantage of the moving packed bed property of constant void fraction in order to integrate measured parameters into simultaneous solution of Ergun-based equations and conservation of mass equations across multiple sections of the standpipe.

Abstract: This disclosure relates generally to flow sensors, and more particularly, to flow sensors that include a pressure related output signal. In one example, a flow sensor assembly may include a housing with an inlet flow port, an outlet flow port and a fluid channel extending therebetween, with a flow sensing element positioned in the housing and exposed to the fluid channel. A filter insert may be situated in the fluid channel, sometimes upstream of the flow sensor. When so configured, the flow sensor assembly may output a pressure or differential pressure based, at least in part, on a value of the flow rate through the fluid channel as sensed by the flow sensor.

Abstract: An improved pump, reservoir and reservoir piston are provided for controlled delivery of fluids. A motor is operably coupled to a drive member, such as a drive screw, which is adapted to advance a plunger slide in response to operation of the motor. The plunger slide is removably coupled to the piston. A method, system, and an article of manufacture for automatically detecting an occlusion in a medication infusion pump is provided. The electrical current to an infusion pump is measured. Based on a series of measurements of one or more variables, the infusion pump detects whether there is an occlusion in the system.

Abstract: A system and method for accurately calculating the oil quantity and oil consumption rate of an aircraft engine detects the level of oil in an oil tank, calculates the oil quantity in the oil tank by compensating for the acceleration of the aircraft, as well as changes in the pitch, yaw and roll of the aircraft. The oil consumption rate of the aircraft is also calculated by calculating the oil quantity at different times, and dividing the difference in oil quantity by the difference in times. The percentage change in oil consumption of the aircraft engine is also calculated. The oil quantity and oil consumption rate can be reported during and after the aircraft's flight.

Abstract: A method of monitoring soot mass in a particulate filter of an exhaust system includes determining a pressure differential across the filter, obtaining a first soot mass estimate by fitting the determined pressure differential to a first stored database of measured or modeled pressure differentials and corresponding measured soot masses taken during filter regeneration using a substantially similar filter previously loaded following a complete filter regeneration, and obtaining a second soot mass estimate by fitting the determined pressure differential to a second stored database of measured or modeled pressure differentials and corresponding measured soot masses taken during filter regeneration using a substantially similar filter loaded following an incomplete filter regeneration. Actual soot mass is estimated by calculating a weighted sum of the first and second soot mass estimates with weighting based on operating parameters indicative of regeneration efficiency.

Abstract: A method and apparatus are disclosed for determining a flow rate in a topical negative pressure (TNP) system. The method includes the steps of determining a pumping speed associated with a pump element of a TNP system, determining a pressure associated with a flow path associated with the pump element, and determining flow rate in the flow path responsive to the pumping speed and flow rate.

Abstract: A method and a CPAP apparatus for characterizing different mask systems, e.g., masks and hoses, are provided. The apparatus can be calibrated for different mask systems and hoses by including sensors for measuring flow and pressure at a flow generator of the apparatus. When the flow generator is fitted to a new system, or changes are made to an existing system, mask or patient interface, and/or hose, a method of calibrating the flow generator is provided. The method includes determining air flow characteristics of the hose using flow measurements made during a first test period when flow through the system is open, measuring or estimating pressure in the system during a second test period when flow through the system is blocked, and determining air flow characteristics of the diffuser using the air first test period flow characteristics of the air delivery hose and the second test period pressure measurements.

Abstract: A method of estimating fresh air flow rate entering an engine, for example a diesel engine, supercharged by a turbocharger, including at least one intake manifold of a volume, an exchanger, an air filter, a high-pressure EGR circuit, a low-pressure EGR circuit, an inlet butterfly, an exhaust butterfly, a flow meter, a pressure sensor, a temperature sensor, and a pipe between the flow meter and the inlet of the intake manifold.

Abstract: A method of calculating fuel flow across an aircraft flight cycle includes the steps of providing a flow meter, and an alternative method of measuring fuel flow. The flow meter is used to calculate fuel flow over a portion of a flight cycle of an aircraft equipped with the system. Fuel flow is calculated with the alternative measurement system at least during maximum power flow portions of the flight cycle. A system is configured for performing this method. A method of calculating mass flow across a fuel metering unit uses fuel flow volume measurements and information about the fuel to reach a mass flow measurement.

Abstract: One embodiment comprises a method of providing accurate mass flow controller flow rate data for a non-manufacturing-tuning-gas. The mass flow controller may be operated at a setpoint greater than 50%. Data may be recorded to a mass flow controller memory. The setpoint may then be changed to 0%. The recorded data may then be analyzed and one or more non-manufacturing-tuning-gas correction algorithm parameters may be calculated. The one or more non-manufacturing-tuning-gas correction algorithm parameters may be stored in a mass flow controller memory and subsequently used in at least one future mass flow controller operation involving the non-manufacturing-tuning-gas.

Abstract: A method of determining the position of a valve includes, measuring pressure at a first location within a bore and measuring pressure at a second location within the bore wherein the first location and the second location are positioned on opposing longitudinal sides of the valve. The method further includes analyzing values from the measuring and attributing characteristics of the analyzing to specific valve positions.

Abstract: A method, system and computer program product for determining permeability of an earth formation of a reservoir are disclosed. A method may include: providing formation testing data of the earth formation; defining layering of the earth formation; determining a geological model for each layer; modeling pressure transient in the earth formation by representing pressure transient within a layer using an analytical solution and representing pressure transient between two layers using a numerical solution, the analytical solution selected based on at least one of the respective geological model and data regarding a drilled well of the reservoir, and a parameter of the analytical solution and a parameter of the numerical solution being determined based on the formation testing data; and determining the permeability of the earth formation based on the pressure transient model.