Matches 151 - 200 out of 363 < 1 2 3 4 5 6 7 8 >


Match Document Document Title
6739203 Ultrasonic transducer and flow sensor configuration  
Ultrasonic transducers for use in time-of-flight flow measurement are made by clamping a conformal material between a face of a piezoelectric element and a housing so as to efficiently...
6732595 Method of and system for determining the mass flow rate of a fluid flowing in a conduit  
A method of and system for analyzing the mass flow rate of a fluid flowing in a conduit wherein ultrasonic energy is transmitted along multiple v paths in multiple parallel quadrature planes...
6725878 Gas leak detection system  
A gas leakage detection system includes a flow path, a dual mode valve disposed in the flow path, an ultrasonic measuring section including a pair of ultrasonic transducers, disposed in the flow...
6715366 Clamp-on ultrasonic flowmeter  
A clamp-on ultrasonic flowmeter has a pair of ultrasonic transmitting-receiving devices. Each device is composed of a ultrasonic propagating element in the form of wedge having a bottom surface...
6681641 Clamp-on gas flowmeter  
Disclosed is a gas flowmeter comprising a transmit transducer for injecting sonic energy into gas; a receive transducer for receiving the sonic energy; and a spool of pipe having a metallic pipe...
6681642 Ultrasonic flowmeter and manufacturing method thereof  
An ultrasonic flowmeter of the present invention has a pipe (2) through which a fluid to be measured flows, and measurement portions (3) separated on the pipe by a predetermined distance along the...
6675111 Method and apparatus for measuring flow velocity and method and apparatus for measuring flow rate  
Disclosed is a method and apparatus for measuring flow velocity and flow rate of a fluid in a tube member or the like with high precision. A flow vel0ocity measuring method has: a step of allowing...
6647805 Transit-time difference type ultrasonic flowmeter  
A transit-time difference type ultrasonic flowmeter comprises a pair of ultrasonic transducers mounted on a flow tube at an upstream side and a downstream side respectively, a switching device for...
6644130 Ultrasonic flow meter having a tubular elastic transducer holding unit  
The ultrasonic flow meter of the present invention comprising a measuring pipe through which liquid flows, and two measuring units provided at an interval in the lengthwise direction on measuring...
6644129 Flow rate measurement apparatus  
A flow rate measurement apparatus includes: a plurality of flow paths 13 provided between an inflow port 11 and an outflow port 12; opening/closing sections 14 for opening/closing the plurality of...
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...
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...
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...
6606916 Timed window ultrasonic gas meter with nose cone  
An ultrasonic fluid flow meter (50) measures the flow speed of a fluid by measuring the time, in each direction, for a sequence of ultrasonic pulses (55) to pass between two transducers (54A,54B)...
6604433 Ultrasonic transducer and ultrasonic flowmeter  
The present invention provides an ultrasonic transducer having uniform characteristics. Because the characteristics of a pair of ultrasonic transducer are equalized with each other, measuring...
6595070 Acoustic flow meters  
Acoustic flow meters are used for the measurement of flow velocity of fluids. They have particular application in meters for gas and water in pipelines. The meter includes a tube fitted with three...
6584862 Ultrasonic flowmeter for flowing media  
Illustrated and described is an ultrasonic flowmeter for flowing media, that operates according to the transit time method, with a measuring tube and at least one transmitting and/or receiving...
6584861 Transmitting and receiving circuit for ultrasonic flowmeter  
Transmitting and receiving circuit for an ultrasonic flowmeter, comprising at least two ultrasonic transducers arranged for the transmission and receipt of ultrasonic signals in opposite...
6582379 Apparatus and method of measuring the flow of a liquid, in particular urine, from a patient  
An apparatus for measuring the discharge of a liquid, in particular urine, from a patient. The apparatus includes a measuring container (1), means (H) for applying a first acoustic signal to the...
6575044 Transit-time flow sensor combining high resolution and wide dynamic range  
A time-of-flight flow sensor, of the type in which a measured phase difference between upstream and downstream acoustic propagations is representative of fluid flow rates, is operated at two...
6571643 Ultrasound speed measurement of temperature and pressure effects  
An apparatus and process for using ultrasound to measure speed and acceleration in fluids is provided. Three preferred embodiments are disclosed. The first preferred embodiment measures fluid...
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....
6561005 Procedure and device for acoustically detecting microparticles  
A procedure for detecting microparticles released by at least one dispenser, encompassing the following steps: (a) triggering the dispenser over an oscillation target (20) with a sensor material...
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...
6550345 Technique for measurement of gas and liquid flow velocities, and liquid holdup in a pipe with stratified flow  
An ultrasonic flowmeter is disclosed that detects the speed, amount, and composition of a two-phase flow travelling through it. One or more ultrasonic paths corresponding to ultrasonic transducers...
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)...
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 (Lb) from each other support two transducers (5, 6) which are acoustically...
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...
6513391 Transmitting and/or receiving head for sonic flowmeters  
A transmitting and/or receiving head for a sonic flowmeter measuring moving fluids by the runtime method, with an enclosure, an ultrasonic transducer transmitting ultrasound signals into and/or...
6508134 Transit-time flow sensor-frequency mode  
A transit time ultrasonic flow sensor uses a pair of transducers that alternate between transmitting and receiving operational states, the operating frequency of a reference oscillator driving the...
6494105 Method for determining flow velocity in a channel  
A method for measuring fluid flow are disclosed. The invention combines isolating flow conditioner technology with ultrasonic technology to determine flow velocity. The method and apparatus of the...
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...
6463808 Ultrasonic measurement system with chordal path  
Flow is described by first variables related to a coordinate system, and by at least one second flow-related variable such as friction factor or Reynolds number unrelated to the coordinate system,...
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...
6435030 Measurement of propagating acoustic waves in compliant pipes  
A pipe 16 having a produced fluid 18 (liquid an/or gas) and at least two acoustic pressure sensors 20-24, is provided with a cylindrical sleeve 30 attached to the pipe 16 at two locations around 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...
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...
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...
6418796 Sonic flow measurement apparatus for tubes including sonically matched plates  
The present invention includes a clamp-on housing for encapsulating or confining a flexible tube or pipe. The housing includes transducers therein for transmitting and receiving sonic energy. A...
6412354 Vibrational forced mode fluid property monitor and method  
A fluid property monitor includes a transducer assembly to impart multiple frequency energy to a conduit in one or more modes and to receive resonant frequency energy from the conduit. The...
6397683 Clamp-on ultrasonic flowmeter  
An improved clamp-on arrangement having a first sensor assembly (2, 2′) and a second sensor assembly (3, 3′) usable for different nominal diameters of pipes. The sensor assemblies can be...
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...
6345539 Relating to flow measurement  
An ultrasonic insertion flowmeter (100) is disclosed having a probe (101) which is adapted to be inserted into a duct, the probe having at least first and second ultrasonic transducer means, the...
6345538 Dual chamber ultrasonic flow meter with membranes having equal pressure on opposite sides thereof  
An ultrasonic flow meter for measuring a flow in a measurement channel has a first sensor chamber with a first membrane arranged against the measurement channel and a first transducer arranged at...
6338277 Flowmeter for attenuating acoustic propagations  
A flowmeter for a medium includes two transducers displaced from each other in the direction of flow of the medium. The flowmeter contains an emitting device which emits acoustic signals in both...
6332360 Apparatus for measuring the depth, water velocity or water temperature of an open channel  
An apparatus for measuring the depth of water and the water temperature at any point of an open channel by measuring an ultrasonic propagation time transmitted between a plural number of...
6305233 Digital speed determination in ultrasonic flow measurements  
A method and device (60) is described which measures the speed of a flowing fluid (F) by measuring the difference in time taken for an ultrasonic signal to travel first upstream and then...

Matches 151 - 200 out of 363 < 1 2 3 4 5 6 7 8 >