Matches 301 - 350 out of 363 < 1 2 3 4 5 6 7 8 >


Match Document Document Title
4374477 Ultrasonic measuring device  
An ultrasonic measuring device for measuring the fluid flow of a high temperature fluid in a conduit. Ultrasonic transducers are mounted on first and second frames which have end portions hingedly...
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...
4334431 Ultrasonic measuring instrument  
By detecting the instant of a selected zero-crossing of a received ultrasonic signal rather than relying on the instant the amplitude of that received signal exceeds a predetermined reference...
RE30900 Fluid current meter  
Two pairs of acoustic transducers are provided for obtaining fluid current velocity measurements. The pairs of transducers are mounted in a supporting ring which introduces a controlled source of...
4262545 Acoustic fluid velocity measuring system  
An acoustic fluid velocity measuring system includes mutually perpendicular arms disposed in the direction of the rectangular components of the fluid velocity, with each arm supporting two...
4246800 Strobed power supply for an ultrasonic measuring instrument  
In a measuring instrument for obtaining information about a medium through which ultrasonic signals can be transmitted or from which ultrasonic signals can be reflected, transducers (21 and 22)...
4240292 Method for triggering ultrasonic flow meter and ultrasonic flow meter adapted for same  
A method for triggering an ultrasonic flow meter comprising a synchronized ring circuit, consists of periodically turning the ring circuit on and off by trigger pulses whose repetition period is...
4236406 Method and apparatus for sonic velocity type water cut measurement  
In a method and apparatus for metering water content in an oil-water system by determining sonic velocities in the flowing oil-water mixture, and thereafter determining flow rate to provide...
4206639 Doppler acoustic wind sensor  
A system for remote measurement of wind velocity and direction. An acoustic echo transmitter for directing a beam of acoustic energy toward a zone, and a plurality of receivers for receiving...
4203322 Apparatus for the ultrasonic measurement of the flow velocity of fluent media  
In an ultrasonic flowmeter ultrasonic signals are transmitted alternately upstream and downstream of a fluent media whose flow velocity is to be ascertained. The repetition rate at which signals...
4195517 Ultrasonic flowmeter  
An ultrasonic flowmeter of the upstream/downstream sonic propagation type includes two transducers mounted externally on the same side of a flow conduit. The transducers are coupled to respective...
4182173 Duplex ultrasonic imaging system with repetitive excitation of common transducer in doppler modality  
A duplex imaging system with a common transducer array for both modes of operation satisfies the conflicting bandwidth requirements by single impulse excitation of the transducer in B-scan imaging...
4173889 Ultrasonic flowmeter  
An ultrasonic flowmeter for measuring the rate of flow of a fluid, comprising a conduit and two acoustic probes placed on a line inclined with respect to the axis of said conduit. The active end...
4162630 Measurement and reconstruction of three-dimensional fluid flow  
Reconstruction of the three-dimensional fluid velocity vector field in a moving medium from a set of measurements of the acoustic propagation time between a multiplicity of transmitter and...
4144753 Circuit arrangement for determining physical parameters of flowing media by the ultrasonic method  
The invention relates to a circuit for determining the arrival time of an ultrasonic signal. The circuit includes a differentiator for transforming an ultrasonic signal to a substantially linearly...
4143547 Method and apparatus for remote measurement of variation in wind velocity  
An acoustic echo system transmitter and receivers for measuring signal scattering at a zone resulting from wind movement, with the receiver doppler outputs averaged to provide spectra of wind...
4143548 Measuring the speed of an aircraft  
A continuous wave ultrasonic wave transmitter transmits modulated waves in two opposite directions being intercepted by a forward receiver and an aft receiver. The received signals are demodulated...
4140012 Small pipe flowmeter  
An assembly for an ultrasonic flowmeter apparatus includes a housing having first and second opposite ends, an inlet and an outlet, a tube within the housing to define a passage in the housing, a...
4114438 Devices for measuring the flow speed of a fluid  
Device for measuring the flow speed of a fluid, comprising sound wave transmitting-receiving probes placed in the fluid flow, wave generating means, transforming means for exploiting the...
4112756 Ultrasonic air data system  
The ultrasonic air data system determines the relative velocity of an aircraft with respect to the medium in one, two or three directions. In addition, it may determine the speed of sound and the...
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...
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...
4098117 Open channel flow transducer for sewerage system  
An open channel flow transducer is provided for measurement of the flow of liquid in a sewer pipe or the like which is not always completely filled. A flow tube which may be of plastic has an...
4094193 Acoustic system for measuring the speed of currents in a body of water  
An acoustic system for measuring the speed of flow or current speed of a body of water employing a measuring path through the water which extends from one shore to the other in a direction oblique...
4080574 Apparatus for providing time reference signals  
Apparatus for providing an accurate time reference upon a pulse of high frequency electrical signal oscillations comprises a zero crossover detector which includes an amplitude threshold detector,...
4031756 Ultrasonic air movement and temperature measuring apparatus  
An ultrasonic air movement vector, magnitude and temperature sensing apparatus using a three element ultrasonic probe with a common transmitter element sending wave energy to selectively...
4019373 Ultrasonic transducer mounting and coupling assembly  
An ultrasonic transducer apparatus for sensing flow velocity through a pipe wall has a pair of strap-on transducer assemblies for securing to an unprepared pipe surface, the energy coupling...
4014211 Ultrasonic flow meter  
In an ultrasonic flow meter for measuring the flow rate of a fluid flowing through a pipe by determining the frequency difference between ultrasonic waves traveling within the fluid in the...
4004461 Ultrasonic measuring system with isolation means  
A device for performing ultrasonic measurements on liquid flowing within a conduit having walls of relatively high acoustic impedance material. The conduit is split into two separate segments with...
4003256 Acoustic oscillator fluid velocity measuring device  
A fluid velocity measuring device for the accurate fast measurement of the velocity of a fluid whether liquid or gas using the time of passage of acoustic energy through the fluid as the frequency...
4003252 Acoustical wave flowmeter  
A fluid flowmeter for measuring the velocity of a fluid flowing along a path. The flowmeter comprises an enclosed housing having a fluid inlet and a fluid outlet; a liner having an inner wall...
3964308 Ultrasonic flowmeter  
Ultrasonic system for measuring fluid flow by comparing the responses from pulsed beams transmitted obliquely in opposite directions through fluid flowing in a pipe section. The transducer...
3949605 Acoustic current/flow measuring system  
A system for measuring flow of water in large bodies of water or in small pes in which an acoustic signal is transmitted simultaneously via a radio transmitter-receiver system and a...
3891869 Piezoelectrically driven ultrasonic generator  
Ultrasonic system for measuring fluid flow by comparing the responses from pulsed beams transmitted obliquely in opposite directions through fluid flowing in a pipe section. The transducer...
3861211 ULTRA-LOW FLOW VELOCITY CURRENT METER  
This invention relates to the use of an acoustic signal to determine curr velocity of water. The device makes use of a centrally single positioned transducer with four equispaced receivers...
3782193 FLOWMETER APPARATUS  
Three posts mounted on the underside of a ship transmit acoustic signals to and from one another for computation of ship's speed. The posts are streamlined for traveling through the water and each...
3771117 TRANSDUCER INSTALLATION  
A transducer assembly holder is mounted through the wall of a fluid conveying structure and includes an acoustic window in communication with the fluid. A transducer assembly is positioned within...
3751979 SPEED MEASUREMENT SYSTEM  
A speed measurement system utilizing a plurality of radiators coupled to a medium for transmitting radiant energy signals within the medium between the radiators in a manner wherein the frequency...
3729993 DIGITAL KNOTMETER AND LOG  
A digital knotmeter and log for registering the speed of a boat in knots, and its elapsed distance in terms of the integral of its relative velocity through the water, in which the higher ordered...
3727458 MEASUREMENT OF RATES OF FLOW OF GASES  
A method and apparatus are described which enable the rate of flow of gas in a tube to be measured accurately. The invention uses two sources of acoustic signals to propagate upstream and...
3715709 SING-AROUND VELOCIMETER  
A sing-around velocimeter having a fixed sound path length so that the repetition rate is a function of the velocity of sound in the fluid and consequently of the characteristics of the fluid. A...
3653259 ULTRASONIC FLOWMETER SYSTEMS  
Described are systems for measuring the rate of fluid flow wherein the time delay between acoustic pulses transmitted upstream and downstream in a fluid passing along a path of travel is...
3548653 DIRECTION AND VELOCITY DETERMINING APPARATUS  
3625057 ULTRASONIC FLOWMETER  
3611801 RESPIRATION MONITOR  
3420102 ACOUSTIC FLUID METERING DEVICE  
3357243 Flow meters  
3336801 Apparatus for measuring water flow velocity  
3282101 Ultrasonic flow speed measuring apparatus  
3184959 Velocity of sound meter  

Matches 301 - 350 out of 363 < 1 2 3 4 5 6 7 8 >