Did You Know...
...that after Parker Brothers executives turned down the game of Monopoly because it had "52 fundamental errors" (including taking too long to play), a copy of the game wound up in the home of the company president who stayed up until 1 a.m. to finish playing it? He was so impressed by the game that the next day he wrote to inventor Charles Darrow and offered to buy it!
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| Number | Title | Issue Date |
| 7942068 | Method and system for multi-path ultrasonic flow rate measurement In one embodiment, a multi-path ultrasonic flow meter for determining the flow rate of a fluid in a conduit is disclosed comprising at least two transducer pairs attached to the conduit at two chord locations, one greater than and one less than a mid-radius chord, w... | 05/17/2011 |
| 7810399 | Ultrasonic flowmeter An ultrasonic flowmeter with a measuring tube through which flows a medium and which, viewed in cross section, has a split circumference forming two halves with two ultrasonic converter pairs, each with an associated ultrasound reflector. The converters of each pair... | 10/12/2010 |
| 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 also provided and configured to non-intrusively determine a flow rate... | 11/25/2008 |
| 7237441 | Ultrasonic type fluid measurement device An ultrasonic fluid measurement instrument is capable of highly accurate fluid measurement. A measurement part is provided forming a plurality of split channels partitioned by partition boards halfway across a fluid channel, and at least a pair of ultrasonic transmi... | 07/03/2007 |
| 7159472 | Apparatus for determining fluid flow An apparatus for determining the flow rate of a fluid in a pipe. The apparatus includes a device for providing acoustic energy on a diametrical path through the fluid. The diametrical providing device is in contact with the pipe. The apparatus also includes a signal... | 01/09/2007 |
| 7013240 | Method to snapshot and playback raw data in an ultrasonic meter A system and method is configured to take a “snapshot” of data received by a meter or measurement device so that it may be later frozen or duplicated in a manner identical to that of the meter. The system includes recording a continuous stream of raw data into a... | 03/14/2006 |
| 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 means, for example in the form of CMOS switches. However, problems ar... | 09/20/2005 |
| 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 transducer to at least one other ultrasonic transducer. The runtime of... | 06/14/2005 |
| 6842716 | Method and apparatus for measuring the propagation time of a signal, in particular a ultrasonic signal Propagation time Tp 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 n successive pulses of period Te giving rise to ... | 01/11/2005 |
| 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 direction of signal propagation in one path faces in an opposite sen... | 12/07/2004 |
| 6644119 | Noninvasive characterization of a flowing multiphase fluid using ultrasonic interferometry An apparatus for noninvasively monitoring the flow and/or the composition of a flowing liquid using ultrasound is described. The position of the resonance peaks for a fluid excited by a swept-frequency ultrasonic signal have been found to change frequency... | 11/11/2003 |
| 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 the water, acoustic radiation propagates away from the be... | 04/22/2003 |
| 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 maximum deviation of an inner diameter presented as a pipe... | 11/05/2002 |
| 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 flow measurement; and multiplying a flow velocity componen... | 10/08/2002 |
| 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 receiving ultrasound signals and each disposed in one of t... | 05/25/1999 |
| 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 direction by the first transducer and received by the second ... | 10/06/1998 |
| 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 transducers. A driver circuit is suitably coupled to the first and... | 07/07/1998 |
| 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 the fluid flow in a producing well or a horizontal line. A s... | 05/05/1998 |
| 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 downstream oscillator (26) with a downstream signal (28) havi... | 01/20/1998 |
| 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 transducers, and determining the characteristics from the measure... | 08/20/1996 |
| 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 ultrasonic vibrators mounted at the apexes A, B and C of a ... | 05/14/1996 |
| 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 the measuring line made of a material that transmits an a... | 10/17/1995 |
| 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 adapted to project a beam of ultrasonic sound to correspondi... | 03/03/1987 |
| 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 depth. Fluid flow rate is proportional to the difference in t... | 06/05/1984 |
| 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 of opposed upstream and downstream transducers which proj... | 02/21/1984 |
| 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 transmitter. A second transmitter-receiver pair is similarly lo... | 10/11/1983 |
| 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 spaced apart transducer element positioned to transmit and rece... | 12/28/1982 |
| 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 interrogation which is parallel or nearly parallel to the ... | 06/29/1982 |
| 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 direction to those higher up. This change of wind speed wi... | 06/22/1982 |
| 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 of the known methods of numeral integration to place the tr... | 02/23/1982 |
| 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, fj (p,mk) (where p is a position in the conveyance and mk depends upon th... | 11/17/1981 |
| 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 flow, and a numerical integration technique for obtaining the ... | 08/29/1978 |
| 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 least one midradius chord of the duct, the projection of tha... | 08/01/1978 |
| 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 is the radius of the conduit. This average flow velocity ... | 07/25/1978 |
| 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 beam with an upstream and the other with a downstream com... | 03/14/1978 |
| 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 determined by computing the difference between upstream and ... | 06/14/1977 |
| 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.... | 05/24/1977 |
| 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 energy toward one another through the fluid, along a plur... | 03/02/1976 |
