Abstract: To further reduce calculation load in flow analysis of a fluid in a cavity. Provided is an information processing device including: a division unit configured to divide a cavity in which a fluid flows into a plurality of infinitesimal elements; an adjustment unit configured to adjust an equation expressing a conservation law of a physical quantity related to the fluid, on a basis of distribution of a thickness of the cavity; and an analysis unit configured to calculate flow velocity for each of the infinitesimal elements by using the equation adjusted by the adjustment unit.

Abstract: A permeability log is generated by running borehole tools in a borehole traversing a formation, including at least electromagnetic (EM) tool providing at least a low-frequency complex conductivity measurement at least one frequency. Data from the EM tool and other data obtained from other tools are provided to a wideband EM model, where a data inversion is conducted to provide a plurality of outputs from which a cementation exponent may be calculated. The cementation exponent is used to find a formation factor at each depth of interest in the borehole, and the formation factor is used to find a permeability value which is used for the permeability log. The permeability log may be generated without the use of core data.

Abstract: Various embodiments include a method for diagnosing a crankcase ventilation line of a crankcase ventilation device for an internal combustion engine having a crankcase, an intake tract, and a compressor arranged in the intake tract for compressing the intake air comprising: diverting fresh air from the intake tract via a fresh air supply line; either enabling or inhibiting a flow of fresh air into a free volume of the crankcase depending on a switch position of a shut-off valve in the fresh air supply line; detecting a nitrogen oxide concentration in the crankcase during the process of crankcase ventilation, close to the point of introduction into the intake tract upstream of the compressor using a nitrogen oxide sensor; and evaluating the tightness of the crankcase ventilation line based at least in part on the detected nitrogen oxide concentration.

Abstract: A method for monitoring water quality in a water supply network, the method including: providing a plurality of sensor units at predefined locations along the water supply network; monitoring water in the water supply network with the sensor units to receive detected sensor values; communicating the detected sensor values from the plurality of sensor units to a computer server in real-time; analyzing the sensor values at the computer server in order to detect changes in quality of water moving between the sensor units; and outputting real-time data from the computer server to a geographic information system (GIS) user interface or a Graphic User Interface (GUI).

Abstract: Various implementation described herein are directed to a method for identifying a blockage in a pitot-static system. A pressure signal is received. Pressure fluctuations in the pressure signal are identified. A determination is made as to whether a blockage has occurred in the pitot-static system based on the identified pressure fluctuations.

Abstract: The present invention provides a thermal flow rate measurement device that is capable of highly accurate correction of the temperature of an intake gas flow rate using a two-dimensional correction map that stores a correction value in association with temperature and intake gas flow rate.

Abstract: A method and device for determining the flow rate of the wet gas using real-time THz imaging and for determining the flow rate of solid contaminants in oil and gas pipelines using real-time Tera Hertz (THz) imaging is disclosed. A THz imaging device for real-time multiphase flow measurement comprises a THz imaging subsystem having a THz source and an imaging capturing a captured image. Wherein the imaging having at least a two dimensional array of pixels, wherein the multiphase flow may comprise at least one of oil, water, gas and solid contaminants. Further, a method for real-time measurement of a wet gas flow of a gas is disclosed. The flow of gas comprising at least one of a fluid phase or solid contaminants in the gas flow. The method comprises at least the steps of using a THz subsystem on the gas flow to acquire a captured image and further processing the captured image to determine the flow rate of the flow of gas.

Abstract: A method for monitoring the volumetric flow of a metering valve (131) of a fluidic metering system (100) of an internal combustion engine, in which at least one feed pump (111) for feeding a fluid is arranged, the feed pump (111) being connected to a feed line (207) and to a return line (160), and it being provided in particular that an inner leakage of the feed pump (111) is determined and that the volumetric flow of the metering valve (131) is monitored on the basis of ascertained (320, 325) pressure values on the basis of the determined inner leakage of the feed pump (350).

Abstract: The present disclosure provides methods of assessing DAR of ADC products that provide advantages over known methods. Specifically, methods of the disclosure can be used in high-throughput applications and/or without having to dilute ADC samples during the assessment.

Abstract: A vibratory sensor (5) includes a vibratory element (104), a receiver circuit (134) that receives a vibration signal from the vibratory element (104), and a drive circuit (138) that generates a drive signal. The drive circuit (138) includes a closed-loop drive (143) and an open-loop drive (147). The meter electronics (20) vibrates the vibratory element (104) commencing at a commanded first frequency and in an open-loop manner to achieve a first target phase difference ?1 for a fluid being characterized and determines a corresponding first frequency point ?1, vibrates the vibratory element (104) commencing at a commanded second frequency and in the open-loop manner to achieve a second target phase difference ?2 and determines a corresponding second frequency point ?2, and determines a viscosity of the fluid being characterized using the first frequency point ?1 and the second frequency point ?2.

Abstract: Described herein are embodiments of a control system that automatically (1) determines whether a gas extraction system is in a state in which landfill gas is being released into the atmosphere, and (2) automatically controls landfill gas flow to mitigate, prevent and/or stop the release of landfill gas. The control system may control a valve to control flow of landfill gas through well piping of the gas extraction system. The pressure of landfill gas in the well piping at a location upstream of the valve may indicate whether there is a risk of landfill gas being released into the atmosphere. The control system may adjust a position of the valve in response to determining that the pressure at the location upstream of the valve indicates that there is a risk of landfill gas being released into the atmosphere.

Abstract: The cleaning of milk transporting conduit structure involves introducing fluid and an amount of gas into the milk transporting conduit structure, which causes a slug of fluid to be formed in and forwarded through the milk transporting conduit structure. A sensor arrangement measures at least one parameter related to the slug, and repeatedly forwards updatings of the at least one measured parameter to the data processor. Based thereon, the data processor produces an indicator of at least one quality of the cleaning process. The indicator reflects a cross-sectional profile of the slug at at least one position in the milk transporting conduit structure.

Abstract: A method for performing computations associated with bodies located in a computation region includes, for each subset of multiple subsets of the computations, performing the computations in that subset of computations, including accepting data of bodies located in each of a plurality of import regions associated with the subset of the computations, the import regions being parts of the computation region; for each combination of a predetermined plurality of combinations of multiple of the import regions, performing computations associated with sets of bodies, wherein for each of the sets of bodies, at least one body of the set is located in each import region of the combination.

Abstract: A work machine with a chassis, a wheel hub rotationally coupled to the chassis, a tire coupled to the wheel hub and configured to engage an underlying surface, and a controller communicating with a plurality of sensors and having a memory unit. Wherein, the controller stores tire data for the tire in the memory unit and the controller determines a cone index of the underlying surface of the work machine based on the tire data and the plurality of sensors.

Abstract: Described are apparatus and methods that automatically generate recommendations to growers. Using various different sets of data relative to a predetermined tract of agricultural land, typically including both imagery as well as electrical usage, they are processed together to make informed decisions regarding the state of the land, particularly with respect to water usage.

Abstract: A method includes simulating, in a lattice velocity set, transport of particles in a volume of fluid, with the transport causing collision among the particles; and generating a distribution function for transport of the particles, wherein the distribution function comprises a thermodynamic step and a particle collision step, and wherein the thermodynamic step is substantially independent of and separate from the particle collision step.

Abstract: A system for estimating aerial vehicle status includes an aerial vehicle, a computing device, and a wireless communication link that communicatively couples the aerial vehicle and the computing device. The aerial vehicle includes a sensor that outputs telemetry data. The computing device includes a processor and a memory. The memory stores instructions that, when executed by the processor, cause the computing device to retrieve the telemetry data from the sensor via the wireless communication link, execute an estimation algorithm based at least in part on the telemetry data, and determine a state of the aerial vehicle based on a result of the estimation algorithm.

Abstract: In an embodiment, the present invention provides a device for measuring the pressure p of a fluid flowing through a pipeline, including: at least one primary sensor arranged on an outer periphery of the pipeline for measuring a primary physical measured variable which is dependent on the pressure p, the absolute value of the pressure p being obtainable by offsetting said primary physical measured variable against at least one calibration datum, the at least one calibration datum relating to the geometry and/or to at least one material property of the pipeline; and a calibration datum determining unit and an evaluation unit for determining the pressure p from the primary physical measured variable in conjunction with the calibration datum. The calibration datum determining unit includes a measuring pipe which can be fluidically connected to the pipeline, which differs from the rest of the pipeline in material and/or in cross-sectional geometry.

Abstract: A differential pressure measuring arrangement, comprising: a differential pressure measuring transducer; a first differential pressure line supplying the differential pressure measuring transducer with the first media pressure; a second differential pressure line supplying the differential pressure measuring transducer with the second media pressure; a temperature sensor; and a processing and evaluation unit for processing the differential pressure measurement signal and the temperature signal; wherein the processing and evaluation unit is adapted to determine a significant correlation between a change of the temperature signal and the differential pressure signal and to consider such as indication of a plugged differential pressure line and is further adapted to test whether a considered indication of a plugged differential pressure line can be verified based on additional process data, which preferably were not registered by the differential pressure measuring transducer.

Abstract: In a measuring method for measuring the viscosity of an essentially non-compressible measuring medium (F) with a measuring device (1) comprising a first container (2), wherein the measuring medium (F) can leak from the first container (2) via a capillary (11) which, in an operating position, is arranged at a certain capillary angle (?) toward the horizontal, preferably perpendicularly, via an outlet opening (13) of the capillary (11), the measuring medium (F) is introduced, in a first process step, into the first container (2) filled with a compressible medium, in particular ambient air (L), whereupon the measuring medium (F) occupies a partial volume (VF0) of the total volume (V0) of the first container (2), wherein, in a second process step, a first pressure difference (?p1), which is kept constant, and, respectively, a second pressure difference (?p2), which is kept constant, or a pressure difference ?p(t)), which decreases over time, are adjusted between a pressure (p1 or, respectively, p2; p(t)) of the c

Abstract: A method of analyzing a substrate contacting a fluid present in an industrial system is provided. The method comprises creating a series of digital images of the substrate while contacting the fluid present in the industrial system. A region of interest in the series of digital images of the substrate is defined. A corrosion feature in the region of interest in the series of digital images of the substrate is identified. The corrosion feature in the region of interest in the series of digital images of the substrate is analyzed to determine a corrosion trend of the industrial system. In certain embodiments of the method, the fluid is industrial water, and the industrial system is an industrial water system.

Abstract: A method and a system control the water production for a water distribution network. The method includes collecting field sensor data from a water distribution network, using the received data to model the water distribution network and determining an optimal water flow, and generating the optimal water production plan for controlling the water production in the water distribution network based on received data including the sensor data and the historical data. The system includes a process and memory and processor executable instructions to carry out the above method.

Abstract: A method of managing a network of wells and surface facilities includes partitioning the network to obtain a pipe sub-network and two or more well sub-networks, and constructing an associated set of equations that represent a steady-state fluid flow in the sub-network. The method further includes setting boundary conditions for each well sub-network, and determining a steady-state flow solution for each well sub-network. The method further includes establishing boundary conditions for the pipe sub-network, and finding a steady-state flow solution for the pipe sub-network. If the solution does not match the estimated pressure, the method further includes adjusting the estimated pressure, repeating said setting, determining, establishing, finding, and adjusting operations until the calculated and estimated pressures converge, and analyzing flow rates of the steady-state flow solutions to evaluate suitability of a modification to the network.

Abstract: Disclosed is a method for detecting anomalies in a distribution network equipped with sensors. The steps are: acquiring for each sensor a time series of physical measurements separated by time intervals; defining time windows each corresponding to a plurality of successive time intervals; extracting operational characteristics of each time series in each time window; forming, for each time window, at least one current vector having for coordinates the operational characteristics, structural data relating to the network and situational characteristics specific to the time window; comparing the current vector with preceding vectors corresponding to preceding time windows and the situational characteristics and structural data of which are similar to those of the current vector; and signalling an anomaly in cases where the current vector is significantly dissimilar to the preceding vectors.

Abstract: Measuring device for measuring an elasticity and a viscosity of a medium, having a first measuring device part having a volume for receiving the medium to be measured, and a second measuring device part that protrudes into the volume, wherein the first measuring device part in relation to the second measuring device part is sealed by way of a gas flow seal, and wherein the first measuring device part in relation to the second measuring device part is movable in a rotating movement about a predefined axis.

Abstract: A method and a measuring device measure the density of fluid media with a sensor having a density measuring device. A frequency oscillator with mass balance is used as the density sensor and all components related to the frequency oscillator with mass balance for the oscillation behavior, oscillation excitation and oscillation evaluation, as well as the frequency oscillator with mass balance directly associated with the measuring and sensor electronics, are enclosed in a housing or cartridge. These components are used with the frequency oscillator with mass balance in the cartridge, and/or the frequency oscillator with mass balance together with the cartridge is adjusted or calibrated using measurement standards and adapted as necessary to the specific application. The cartridge with the frequency oscillator with mass balance is releasably or replaceably connected with the measuring device or its base body before the beginning of the measuring operation to investigate the media.

Abstract: A pipe testing apparatus is described. The apparatus comprises two pipe end holders, respectively to hold a first and a second end of a pipe section under test; a reeling former; a straightening former; and a translator to effect relative translational movement of the pipe and the reeling former and of the pipe and the straightening former to cause the pipe to move selectively into and out of contact with and to apply a contact force against one or other of the reeling former and the straightening former. Each pipe end holder comprises a pipe end connector and an extending arm extending beyond the pipe end connector in a pipe longitudinal direction; and a lateral actuator is provided in association with each extending arm to apply a transverse load to the arm at a point distal from the pipe end connector. A pipe testing method is also described.

Abstract: The present invention relates to a field device adapted to determine a process parameter value related to a tank, the field device comprising a terminal block with: a first interface configured to connect to two wires of a loop; a first electrical conductor and a second electrical conductor for connecting the first interface with field device electronics, the second electrical conductor having a voltage drop generating element; a first power supply conductor connected to said second electrical conductor upstream of the voltage drop generating element and a second power supply conductor connected to said second electrical conductor downstream of the voltage drop generating element; and a second, auxiliary interface adapted for wired connection to an external device and configured at least for communication with said external device, wherein the second auxiliary interface comprises a communications connector which is galvanically isolated from the field device electronics.

Abstract: The present disclosure relates to passive flow control devices or FCDs and modeling methods applicable to same. In particular, a new method to extrapolate the value of a reference FRR tool to other tools with the same architecture, but different ratings. Instead of scaling the output of the model, the data of the available characterizations is used to extrapolate what the characterization results would be to the different FRR. This estimated data set is then used to fit a new model for the uncharacterized FRR tool.

Abstract: A computer-assisted design method for a second three-dimensional object from a first three dimensional object known only by its boundary surfaces, through a surface model of the B-Rep type, of the planar, cylindrical, cone, sphere, or toroid type, excluding free forms in defining the boundary of the object. The first object is broken down into a set of simple volume primitives. The first object is associated with a construction graph defined from these volume primitives and a set of geometric parameters for using these volume primitives in the specific case of that first object. The construction graph enables a compact description of all of the construction alternatives of the object through Boolean combinations of these primitives. The second object is generated as an alternative of the first object according to that construction graph, by modifying some of these parameters.

Abstract: A medical apparatus, such as a dialysis machine (e.g. a hemodialysis machine or a peritoneal dialysis machine), includes a plurality of components, one or more sensors corresponding to the components and configured to detect signals, a display and a control unit. The control unit is configured to: receive signals from the one or more sensors, determine, from the signals, a status of the medical apparatus, and determine control commands for the display based on the determined status for status-dependent control of the display. The described apparatus improves the human-machine interface in terms of set-up time, operating time and freedom from errors. Depending upon the determined status, different status-specific menus may be illustrated on the display in order to assist the user when operating the apparatus or advise the user about any errors or subsequent steps.

Abstract: A coupled simulation of a structural-elastic phenomenon and a heat conduction phenomenon of a simulation target including plural particles is performed. Here, numerical calculation of a motion equation capable of being transformed into an equation of the same form as that of a heat conduction equation is performed with respect to a term of a spatial temperature distribution and a term of a derivative of temperature with respect to time, to perform a simulation of the heat conduction phenomenon of the simulation target.

Abstract: A vibratory sensor (5) includes a vibratory element (104), a receiver circuit (134) that receives a vibration signal from the vibratory element (104), and a drive circuit (138) that generates a drive signal. The drive circuit (138) includes a closed-loop drive (143) and an open-loop drive (147). The meter electronics (20) vibrates the vibratory element (104) commencing at a commanded first frequency and in an open-loop manner to achieve a first target phase difference ?1 for a fluid being characterized and determines a corresponding first frequency point ?1, vibrates the vibratory element (104) commencing at a commanded second frequency and in the open-loop manner to achieve a second target phase difference ?2 and determines a corresponding second frequency point ?2, and determines a viscosity of the fluid being characterized using the first frequency point ?1 and the second frequency point ?2.

Abstract: This invention relates to an editor system for graphical user interfaces used in personal devices, and to a method for enabling a user to selectively display data and edit parameters on the user interface, and to a personal device, like a wristop or a diving computer. In order to edit the graphical user interface having at least one display view, where each set of data fields are arranged in a predetermined manner on the display view, the inventive editor system provides user access to a data field out of a set of data fields to allow user selection of parameters in this field. A list of parameter options valid for said field is displayed for selection by the user, the parameter value of which is to be displayed in said field.

Abstract: A method, system and apparatus for continuously determining the watercut of production fluid flowing in a pipeline from an oil reservoir. The method includes providing an electrochemical impedance sensor at a fixed location in the pipeline for continuously measuring the impedance value of the flowing production fluid at such location. A sample of the production fluid is obtained from the pipeline to determine the watercut value of the sample. From such watercut values from the sample, a correlation formula is determined of the watercut value of the sample with the measured impedance value at the fixed location. Subsequently the continuously measured impedance values are inputted into the correlation formula to continuously calculate the watercut value of the flowing production fluid to thereby continuously determine the watercut of the flowing production fluid with the impedance sensor.

Abstract: Methods and systems for controlling the timing of a fluid driven positive displacement pump (FDPDP) are disclosed using pump inlet pressure, flow rate and time domain control. Pressure is thus controlled at various flow rates of fluids to be pumped in subsea environments. The FDPDP includes a plurality of pressure vessels connected by piping, each vessel having two chambers. One chamber is connected to a source of fluid to be pumped and the other chamber is connected to a source of driving fluid. The methods synchronize pumping chambers that have no mechanical means to control timing between each pumping chamber. The control methods described utilize algorithms which receive feedback from the pumping system to control the pumping sequence and adapt to any parameter changes to maintain a constant range of desired pressure.

Abstract: The present invention makes it possible to, even when a stainless steel is adopted in a diaphragm: prevent the diaphragm and a strain sensor from exfoliating from each other; be hardly susceptible to the influence of temperature in an operating environment; not allow the sensitivity of a pressure sensor to be dominated only by the mechanical characteristic of a material constituting the diaphragm; and increase the degree of freedom in design of members constituting the pressure sensor.

Abstract: A cell for measuring the permeation of a target gas through a sample includes upstream and downstream chambers connected by an opening, a primary seal in contact with the bottom of the upstream chamber and surrounding the opening, and a removable sample holder and means for assembling the sample holder in the cell. Upper and lower frames included in the sample holder are each provided with a through opening. The sample holder includes means for assembling the sample in the sample holder and a first seal flush with the front surface of the lower frame, and surrounding the through opening of the lower frame. In the lower frame of the sample holder, a second seal is flush with the front surface of the lower frame, surrounding the through opening of the lower frame, and being surrounded with the first seal, and a second channel emerging between the two secondary seals.

Abstract: A hydraulic valve includes a valve housing (4) with an inside that defines at least one first flow path (7), and with a valve insert (16) which is arranged in the inside of the valve housing (4). The valve insert (16) includes a movable valve element (14) situated in the first flow path (7). An infrared temperature sensor (46) is arranged on or in the valve housing (4) and is directed onto a surface of the valve insert (16) or a surface of a thermal conductor (48) connected to the valve insert. A hydraulic manifold may be provided with such a hydraulic valve.

Abstract: Systems and methods are provided testing a vehicle braking system. The method includes determining a nominal brake system parameter of the brake system during a braking operation. A first testing brake operation is performed and a first brake system parameter is determined based on the first testing brake operation. A tested brake system parameter is determined based on the first testing system parameter and the tested brake system parameter is compared to the nominal brake system parameter. A brake system compliance suspicion value of the vehicle braking system is then set based on the comparison.

Abstract: There is provided a cleaning method for removing a first deposit, formed on an upper electrode through an etching of a metal layer containing a metal, by using a plasma generated between a lower electrode of a lower structure and the upper electrode in a processing chamber of a plasma processing apparatus. The method includes a step of colliding ions with the first deposit formed on the upper electrode and a step of removing a second deposit, which is generated by said colliding and formed on the lower structure. Further, a cycle including the step of colliding and the step of removing is repeated multiple times.

Abstract: Provided are a concentration-factor measurement device and method for accurately calculating a concentration factor of circulating water, and a method for measuring a water-quality index value of the circulating water. The concentration-factor measurement device includes a light-absorbance measurement unit (1) for measuring absorbance by irradiating each of cells (12A-12C) with light, and an electrode measurement unit (2) equipped with electrodes (16, 17) that are inserted into a water sample in a container (20). For each item of water quality, the device calculates a concentration factor on the basis of a measured value measured when the water sample (W) is the circulating water, and a measured value measured when the water sample (W) is makeup water. A plurality of concentration factors are calculated on the basis of the measured values for plural items of water quality. Hence an accurate concentration factor can be obtained.

Abstract: A device for use in monitoring operation of a system asset includes an interface for receiving sensor data representative of an operating condition of the system asset, a memory device for storing the sensor data, and a processor coupled to the interface and to the memory device. The processor is configured to create a hierarchy of sensor data within the memory device, wherein the hierarchy comprises a first tier and a second tier, store a first level of the sensor data in the first tier, and store a second level of the sensor data in the second tier.

Abstract: A method of operating a counterpulsation device (CPD) in a human or animal subject is disclosed, the method including: receiving a heart beat signal indicative of the heart beat of the subject; providing counterpulsation therapy by controlling the pressure supplied to a CPD drive line in pneumatic communication with the CPD to cause the CPD to alternately fill with blood and eject blood with a timing that is determined at least in part based on the heart beat signal; while providing counterpulsation therapy, receiving a CPD drive line pressure signal indicative of the pressure in the CPD drive line; and adjusting the pressure supplied to the drive line based at least in part on the drive line pressure signal.

Abstract: The dispensing mechanisms dips a dispensing nozzle in a dispensing target contained in a container 11, 21, and 31, aspirates the dispensing target, and discharges the dispensing target to a reaction container 41. One item of determination-purpose reference data is selected from multiple items of the determination-purpose reference data which is stored in a storage unit 93 and used in determining whether or not the dispensing mechanisms 50, 60, and 70 are abnormal, based on the detection result from a pressure sensor 54 when the dispensing mechanisms 50, 60, and 70 dispense a reference dispensing target configured to contain a known ingredient; and whether or not the dispensing mechanisms 50, 60, and 70 are abnormal is determined, based on the detection result from the pressure sensor 54 and the selected determination-purpose reference data when the dispensing mechanisms 50, 60, and 70 dispense a dispensing target used in analysis.

Abstract: A highly efficient, highly accurate controllable digital viscosity testing system is provided. The system incorporates a variable speed motor, a digital encoder, a beam-deflection and/or magnetic torque resistance for unidirectional or bi-directional measurement of shear, and an API recommended practice 13B-11ISO 10414-1 bob and rotor sleeve measurement device for submerging in a test sample to measure shear forces exerted by the test sample.

Abstract: A three-dimensional simulating device for the stratum stability in natural gas hydrate exploitation includes a three-dimensional model located in an environmental control unit, an axial pressure control unit, and a post-processing unit. An inner cavity of the three-dimensional model is divided into a sealed simulating cavity and a sealed axial pressure sealing cavity by an axial pressure sealing piston arranged in the inner cavity. A vertical well and a horizontal well stretch into the simulating cavity. The axial pressure control unit, the environmental control unit, and a plurality of sensors in the three-dimensional model are electrically connected to the post-processing unit.

Abstract: A valve includes a valve housing, which has at least one first connection and a second connection; at least one valve plate arranged in the valve housing; a passage opening arranged between the first connection and the second connection; and at least one valve seat surrounding the passage opening. The valve plate can be brought into contact with the valve seat in order to disconnect a fluid link between the first connection and the second connection. In order that the function of the valve, in particular the position of the valve plate, can be reliably detected, the valve includes a sensor system arranged within the valve housing.

Abstract: A method of isolating a source of an altitude split in a plurality of altitude sensors includes receiving a static pressure reading from a first altitude sensor and receiving a static pressure reading from a second altitude sensor. The method also includes comparing each of the static pressure readings with an expected static pressure value to determine which of the altitude sensors is the source of a split in altitude readings of the altitude sensors.

Abstract: An ultrasonic flowmeter includes a main body that calculates components parallel to a pipe axis regarding the velocity of fluid on the basis of a first propagation time difference, which is the difference in time between the time that ultrasonic waves transmitted from a second ultrasonic transceiver and the time that ultrasonic waves transmitted from a first ultrasonic transceiver propagate through a first flow propagation path traversing inside the pipe in the radial direction for 2n?1 times (n is a positive integer), and a second propagation time difference, which is the difference in time between the time that ultrasonic waves transmitted from the second ultrasonic transceiver and the time that ultrasonic waves transmitted from the first ultrasonic transceiver propagate through the second flow propagation path traversing inside the pipe in the radial direction for 2m?1 times (m is a positive integer other than n).