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7628081 Acoustic pulse flow meter  
A time-of-flight flow meter that is particularly useful for measuring the flow of gases, such as steam, uses a spark gap periodically energized with an electrical pulse to generate an acoustic...
7614309 Cup-shaped ultrasonic transducer for a flowmeter  
In order to be able to couple as great a fraction as possible of ultrasonic measuring signals into a medium to be measured, an ultrasonic sensor is provided with a cup-shape and includes a housing...
7568398 Ultrasonic flow sensor with repeated transmissions  
A transit-time flow sensor determines a rate at which fluid flows by measuring a propagation time difference between upstream and downstream acoustic transmissions. This may involve providing an...
7500403 Ultrasonic flow sensor having interlaid transmitting and receiving elements  
An ultrasonic flow sensor for measuring the volumetric flow rate of a flowing medium through a flow channel having a transducer array which is situated within the flow cross section of the flow...
7469599 Flowmeter mounted on a containment  
Flowmeter comprising at least two ultrasonic transducers that are mounted on a container which is penetrated by a medium in a certain direction of flow. The ultrasonic transducers alternately...
7380470 Ultrasonic flow meter including turbulators  
Measuring volume flows or mass flows in the intake system of motor vehicle internal combustion engines plays an important role in reducing harmful emissions. Therefore, an ultrasonic flow meter for...
7257495 Flow meter filter system and method  
A flow meter filter system ( 200 ) according to an embodiment of the invention includes a noise pass filter ( 203 ) configured to receive a first version of a flow meter signal and filter out the...
7254494 Ultrasonic signal processing method and applications thereof  
An ultrasonic signal processing method for improving the signal-to-noise ratio in ultrasonic measurements comprises the transmission of a predefined timed sequence of a number of ultrasonic burst...
7240566 Device for positioning a clamp-on flowmeter on a container  
An apparatus for the positioning of a clamp-on flow measuring device on a containment, which has a medium flowing through it. The apparatus includes at least two ultrasonic transducers, which emit...
7093502 Ultrasonic gas flowmeter as well as device to measure exhaust flows of internal combustion engines and method to determine flow of gases  
An ultrasonic gas flowmeter includes a measuring pipe with flowing gas, transmitting and receiving sound transducers, transmission and reception electronics, and evaluation electronics. The sound...
7044001 Sonic- or ultrasonic flowmeter  
A sonic- or ultrasonic flowmeter, suitable for replacement of differential pressure flowmeters, comprising: a pipe segment, to be connected to a first and a second pipe, each having a diameter,...
7039530 Fluid measurement  
Techniques for fluid measurement include the ability to introduce a vibration to a container wall and to detect the vibration after the vibration has propagated at least partially around the...
7000485 Flow measurement system with reduced noise and crosstalk  
A flow measurement system including at least first and second ultrasonic transducers coupled to an existing conduit, a damping material about the conduit between the first and second ultrasonic...
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...
6928369 Ultrasonic current meter  
The present invention provides a small, low power consumption ultrasonic flow velocity meter. The burst signal generation section 110 generates two kinds of burst signals with a phase difference...
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...
6877387 Method for measuring displacement of a fluid in a conduit  
The invention concerns a method for measuring the displacement of a fluid in a conduit, by measuring the transit time of ultrasounds between two transducers ( 12, 13 ), in one direction and in the...
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...
6820500 Small pipe bore ultrasonic flowmeter detector  
A flowmeter detector for determining the flow volume of a fluid medium that includes a measuring line having first and second ends and a fluid medium entry and exit ports adjacent the fist and...
6748812 Flow rate measuring apparatus  
A flow rate measuring apparatus includes: flow rate detection section 2 and 3 provided in a fluid flow path 1 ; a measuring section 10 for measuring an output from the flow rate detection...
6745632 Method for measuring ultrasonic transit times  
Embodiments of the invention provide an algorithm for enhancing the transit time measurement of an ultrasonic wave through a fluid, and criteria for evaluating the suitability for various waveforms...
6694824 Flow measuring device  
A flow meter includes a flow path through which a fluid flows; a pair of transceivers for sending and receiving an ultrasonic wave propagating across the flow path; and a flow calculation section...
6634240 Zero crossing detector and method of determining a zero crossing point  
A zero crossing detector has an analyzer which determines a zero level crossing of a currently input electrical pulse packet and which emits a trigger signal indicative of a determination having...
6634239 Ultrasonic fluid quality sensor system  
A system for determining the composition of a multiple-component fluid and for determining linear flow comprising at least one sing-around circuit that determines the velocity of a signal in the...
6629467 Method and a device for determining the flow rate of a flowing medium  
In a method for determining the flow rate of a fluid flowing in a channel ( 2 ), the fluid being constituted by a liquid or a gas, two pulse shaped, oscillating signals are sent through the medium...
6626049 Clamp-on steam/gas flow meter  
A clamp-on ultrasonic measurement system for a gas or other fluid typically of low acoustic impedance such as low pressure steam or flare gas. The system includes a first ultrasonic signal...
6622572 Ultrasonic flowmeter for controlling the gain of an amplifier for amplifying received signals  
The amplifying gain is controlled by means of a data reduction equipment on the basis of the control signal input into the amplifier for amplifying the received signal propagated through the fluid...
6625549 Equipment specifying system  
An equipment specifying system of the present invention includes: a flow path for supplying gas to a plurality of pieces of equipment; an ultrasonic propagation signal measuring section for...
6609430 Low profile transducer for flow meters  
A low profile transducer ( 11, 12 ) is provided for use in flow meter for pipes of small diameter. The transducer ( 11, 12 ) has a transducer ( 18 ) or other form of transducer which transmits and...
6595071 Estimation of error angle in ultrasound flow measurement  
A method for estimating fluid flow in a conduit using a probe with four transducers is provided. The method includes generating two transit time measurements and compensating for an error angle in...
6587796 Ultrasonic flowmeter  
An ultrasonic flowmeter, wherein upstream and downstream receive signals are A/D-converted and thereby the discrete values thereof are determined; a cross-correlation between the upstream and...
6568281 Ultrasonic-wave propagation-time measuring method, gas-pressure measuring method, gas-flow rate measuring method, and gas sensor  
An ultrasonic-wave propagation time measuring method which enables determination of accurate propagation time, a gas-pressure measuring method, a gas-flow-rate measuring method, and a gas sensor. A...
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...
6546810 Process and device for measuring the velocity of flow of a fluid stream  
A process and device for measuring the velocity of flow of a fluid stream by measuring the difference between the respective traveltimes of acoustic pulses emitted by means of a generator (G)...
6539812 System for measuring the flow-rate of a gas by means of ultrasound  
An improved system for measuring the flow-rate of a gas by means of ultrasound, including a tubular element in which a plurality of openings are formed to allow one or more gas-flows to flow into...
6536290 Ultrasonic flowmeter and gas flowmeter using the same  
A loop flow-path is formed by providing a partition in the path of flow of a fluid duct. An incoming flow-path and an outgoing flow-path are provided with the fluid duct through connecting ducts,...
6532828 Device for temperature compensation in an acoustic flow meter  
A meter includes a casing ( 1 ) with a fluid passage ( 2 ), in which two transducer mountings ( 3, 4 ) arranged at a distance (L b ) from each other support two transducers ( 5, 6 ) which are...
6520027 Ultrasonic flowmeter for measuring the flow rate of a gas or liquid by using an ultrasonic sensor  
An ultrasonic flowmeter includes a fluid duct including therein first and second flow-paths separated by a partition and an ultrasonic sensor provided at one end of the fluid duct. A reflecting...
6508133 Ultrasonic flowmeter and ultrasonic generator/detector  
An ultrasonic flowmeter includes a flow passage and an ultrasonic transducer for measuring the flow rate in the flow passage wherein the ultrasonic transducer is equipped with a piezoelectric...
6490933 Ultrasonic flow meter with reduced noise  
The flow rate of a fluid can be measured using an ultrasonic flow meter according to the present invention with a higher measuring accuracy and a lower cost. The feature of the invention consists...
6487916 Ultrasonic flow metering system  
A system for determining the density, flow velocity, and mass flow of a fluid comprising at least one sing-around circuit that determines the velocity of a signal in the fluid and that is...
6470757 Ultrasonic flow velocity measuring method  
An ultrasonic flow velocity measuring method using a transit time difference of continuous sine waves without transmitting/receiving an ultrasonic pulse comprises steps of amplitude-modulating a...
6457371 Ultrasonic flow sensor with error detection and compensation  
An ultrasonic transit time flow sensor detects a signal corresponding to the phase difference between signals from two transducers during the interval of an acoustic transmission, and uses this...
6435038 Ultrasonic flow velocity measuring apparatus  
An ultrasonic flow velocity measuring apparatus measures a transit time under the condition a synchronization of an ultrasonic signal having a modulated frequency by PN (pseudo noise) code of a...
6435037 Multiplexed phase detector  
A method for detecting a phase difference is provided. The method includes selecting first and second input signals from a plurality of pairs of input signals. The method further includes...
6422093 Burst mode ultrasonic flow sensor  
An ultrasonic transit time flow sensor employs two transducers spaced out along a direction of fluid flow. A variable frequency acoustic signal is simultaneously transmitted by both transducers in...
6422094 Method for determining the flow rate and/or the molecular mass of liquid or gaseous media  
Method for determining the flow rate and/or the molecular mass of liquid or gaseous media in flow measuring instruments, especially pneumotachographs, with the aid of the measurement of the transit...
6390999 Method and apparatus for flow measurement with temperature and density compensation  
A transit time ultrasonic flow meter includes a pair of ultrasonic transducers transmitting an ultrasonic signal through a fluid flowing in a conduit and receiving the transmitted ultrasonic...
6370963 Ultrasonic transit time flow sensor and method  
A transit time ultrasonic fluid flow sensor is configured to compensate for circuit related drifts in the flow rate output signal. During acoustic transmission some of the transmitting signal is...
6298735 Pneumotachometer having annular ring transducers  
An accurate and reliable pneumotachometer with annular ring transducers for determining the velocity of a fluid flow is provided. A novel and accurate flow measurement system for measuring transit...
Matches 1 - 50 out of 111 1 2 3 >