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7454981 |
Apparatus and method for determining a parameter in a wet gas flow
In an apparatus for measuring a parameter of a wet gas flow, a gamma densitometer is provided and configured to non-intrusively measure the density of the wet gas flow. A sonar based flow meter is...
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6947851 |
Transceiver circuit for an ultrasonic flowmeter
A transmitting and receiving circuit for an ultrasonic flowmeter. In such circuits, an ultrasonic transducer is typically used as both transmitter and receiver. This is obtained by using switching...
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6907361 |
Ultrasonic flow-measuring method
An ultrasonic flow-measuring method determines the flow rate of a medium flowing through a line is determined by measuring the runtime of an ultrasonic signal that travels from a first ultrasonic...
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6842716 |
Method and apparatus for measuring the propagation time of a signal, in particular a ultrasonic signal
Propagation time T p of an ultrasound signal between two spaced-apart transducers constituting an emitter and a receiver is measured. The emitter transducer is subjected to an excitation signal of...
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6826965 |
Anti-parallel tag flow measurement system
A tag flow measurement system wherein a first and a second measurement path are provided across a flowing fluid, and a receiver in each path receives signals modulated by scatters in the fluid. The...
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6552336 |
Non-invasive, opto-acoustic water current measurement system and method
A method and system are provided for measuring water current. An acoustically-modulated beam of radiation is transmitted to a target location on the surface of a body of water. As the beam transits...
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6474174 |
Ultrasonic multi-channel flow measuring method
An ultrasonic flow rate measuring method comprises steps of measuring an inner diameter of a pipe in a manner to subtract a corrosive resistance layer and its possible thickness deviation from the...
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6460419 |
Ultrasonic flow measuring method
An ultrasonic flow measuring method that includes selecting a section area in a right angle to an ultrasonic transit trajectory line for measuring a flow velocity as a section area necessary for a...
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5907099 |
Ultrasonic device with enhanced acoustic properties for measuring a volume amount of fluid
An ultrasonic measurement device measures a volume-related quantity of a fluid flowing from a first zone to a second zone of the device. The device includes two ultrasound transducers emitting and...
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5818735 |
Method and system for high resolution time-of-flight measurements
A method and system of measuring the differential time of flight of a signal transmitted between first and second transducers. First, multiple broadband signal pulses are transmitted in a first...
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5777238 |
Driver-receiver apparatus for use with ultrasonic flowmeters
An ultrasonic flowmeter for measuring the rate of flow of a fluid by means of bursts of ultrasonic drive pulses that are alternately transmitted and received by first and second ultrasonic...
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5747749 |
Acoustic logging to identify oil flow rate
A method and apparatus for determining the various components of a multi-phase fluid flow in a defined area includes using an acoustic transceiver tool to direct a beam of acoustic energy toward...
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5710379 |
Apparatus and method for determining a flow count
An apparatus for determining a flow count in an ultrasonic flow meter has an upstream oscillator (22) with an upstream signal (24) having a period proportional to an upstream transit time and a...
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5546812 |
Method and device for determining characteristics of the flow of a medium
The invention relates to a method for determining characteristic of the flow of a medium in a channel by measuring the transit times of sound waves which are transmitted between one or more...
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5515721 |
Local river flow velocity measuring method and apparatus therefor
A local river flow velocity measuring method and apparatus therefor comprises a flow velocity meter and a flow velocity measuring circuit, in which the flow velocity meter includes a plurality of...
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5458004 |
Volume flow meter
In a volume flow meter with a measuring line, a first measuring head and a second measuring head, the flow volume can be measured more simply and more reliably using evaluation technology by having...
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4646575 |
Ultrasonic flowmeter
Apparatus for the measurement of fluid flow, particularly flow rates for compressible fluids, comprises at least four transducer sources of ultrasonic energy arranged in fluid conduit system and...
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4452077 |
Borehole ultrasonic flow meter
A borehole tool incorporates an ultrasonic flow measuring device which enables calculation of the rate of flow of material through various perforated intervals of a well casing as a function of...
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4432243 |
Flow calculator with velocity curve fitting circuit means
A novel acoustic flow-measuring apparatus and method of the type comprising a plurality of pairs of transducers mounted at the walls of a pipe carrying the fluid to be measured. Each pair is formed...
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4408589 |
Process and apparatus for operating an internal combustion engine
An ultrasonic transmitter is disposed on one wall inside the air induction tube of an internal combustion engine and an ultrasonic receiver is disposed on the opposite wall, downstream of the...
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4365518 |
Flow straighteners in axial flowmeters
An improved sonic flowmeter having a conduit with an inlet and outlet through which fluid flows for rate measurement, a portion of the conduit providing a linear flow path, a first and second...
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4336719 |
Ultrasonic flowmeters using waveguide antennas
Waveguide antennas for ultrasonic flowmeters are described in which at least one pair of antennas is used to interrogate a flowing fluid. The waveguides are parallel, each pair defining a plane of...
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4336606 |
Wind speed measurement
Wind is the large-scale movement of air from one place to another. It is usual for the air to become horizontally stratified, the layers nearer the ground moving more slowly than or in a different...
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4317178 |
Multiple velocity traverse flow rate measuring technique
A method and systems based thereon for conducting a multiple velocity traverse of a flow stream cross section of known shape and area to determine flow therethrough. The technique employs any one...
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4300401 |
Method and apparatus for determining fluid flow
A method and apparatus for determining volumetric fluid flow rate in an arbitrarily shaped fluid conveyance are disclosed. A plurality of functions, f j (p,m k ) (where p is a position in the...
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4109523 |
Method of determining acoustic flow meter correction factor
A method of modifying multipath acoustic flow meter output readings by a certain correction factor, based upon the generation of data points utilizing an analytical formula for distorted fluid...
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4103551 |
Ultrasonic measuring system for differing flow conditions
A device for performing ultrasonic measurements on liquid flowing within a duct includes a pair of transducers communicating along an acoustic path within the duct. The acoustic path includes at...
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4102186 |
Method and system for measuring flow rate
Volumetric fluid flow in a cylindrical conduit is determined by measuring the average flow velocity of the fluid flowing through a chordal measuring path lying at a radial distance of 0.54R where R...
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4078428 |
Measurement of fluid flow
Apparatus for measuring the mean velocity of fluid flow down a pipe, or quantities related to it such as mean mass flow. Two similar beams of ultrasonic energy are transmitted across the fluid, one...
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4028938 |
Acoustical flow meter
An electroacoustical flow meter for measuring flow rates in open and closed channels includes two sets of transducers, one set being positioned upstream relative to the other set. Flow rates are...
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4024760 |
Fluid flow measurement apparatus
A multi-path acoustic flow measuring system wherein measured parameters from one path are utilized in the calculation process of another path.
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3940985 |
Fluid flow measurement system for pipes
A plurality of transducers are positioned in the walls of a pipe conveying a fluid, the volumetric flow rate of which is to be measured. Opposed upstream and downstream transducers project acoustic...
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3898878 |
Ship speed indicator
A device for measuring the speed of a ship in a medium which includes two oustic projector-receiver units mounted at two points on the bottom of the ship and a logic module conveniently located...
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3693433 |
ULTRASONIC ANEMOMETER
An ultrasonic anemometer for detecting the direction and the magnitude of the wind by the use of two pairs of ultrasonic transmitters and receivers arranged in the wind in spaced-apart opposition...
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3546935 |
FLUID MEASUREMENT SYSTEM AND METHOD
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3214973 |
Acoustic flow meter for measuring very slow fluid flow
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2865196 |
Apparatus for measurements concerning the velocity of propagation of waves, and in particular sound waves
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3564912 |
Title is not available
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