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6119070 |
Method for acoustically measuring a fluid flow rate
A method for measuring a fluid flow rate between two points of a fluid flow according to which a measurement of the respective propagation times of two acoustic signals transmitted in opposite...
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5856622 |
Clamp-on type ultrasonic flow meter and a temperature and pressure compensation method therein
A ratio C of sonic speed in a fluid to a sinusoidal value at an incident angle of sonic waves from the pipe to the fluid is designated as a basic unknown quantity. A distance D between the opposite...
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5835884 |
Method of determining a characteristic of a fluid
A method of determining a characteristic of a fluid involves measuring a sonic transit time (102), along a non-perpendicular path, through the fluid. The sonic transit time is used to determine a...
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5808195 |
Arrangement for determining liquid velocity versus depth utilizing historical data
In the embodiments described in the specification, an acoustic transducer unit emits acoustic signals into a moving liquid and receives reflected signals to produce Doppler frequency signals and a...
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5753824 |
Sampling method and apparatus for use with ultrasonic flowmeters
An ultrasonic flowmeter for bidirectionally measuring the rate of flow of a fluid. Two spatially separated ultrasonic transducers alternately transmit and receive bursts of ultrasonic drive pulses...
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5748504 |
Calibration method for use with ultrasonic flowmeters
In a fluid flow measuring apparatus, a flow of fluid is established through the apparatus at a first known flow rate. For each of two states of the apparatus, electrical drive pulses are applied to...
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5726358 |
Method and device for measuring the discharge in partly filled or completely filled ducts and in open channels
The invention relates to a device for measuring discharges in partly or completely filled ducts or open channels, utilizing measuring sensors. The device comprises a central simulation system (CS),...
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5557536 |
Direct measurement ultrasonic velocity measuring system
To determine the average velocity of a fluid stream, an ultrasonic signal is transmitted into the fluid and reflected ultrasonic signal received. The signals are mixed with a frequency of the...
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5548530 |
High-precision leak detector and locator
A method for detecting the presence of a leak in a segment of a pipeline. The method includes providing a site station having an ultra-sonic transducer assembly at the beginning and end of the...
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5521840 |
Diagnostic system responsive to learned audio signatures
Loose parts are sensed moving in a conduit carrying a flowing material, such as the cooling circuit of a pressurized water nuclear reactor. An acoustic pickup produces an electrical signal with...
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5453944 |
Method and apparatus for leak detection and pipeline temperature modelling method and apparatus
A method and apparatus of leak detection for a pipeline. The method includes dividing the pipeline into a plurality of segments, a first site station provided at the beginning of each segment and a...
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5371686 |
Ultrasonic fluid velocity measuring system
To determine the average velocity of a fluid stream, an ultrasonic signal is transmitted into the fluid and reflected ultrasonic signal received. The signals are mixed with a frequency of the...
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5198989 |
Sewer flow measurement control system
A sewer flow monitoring system wherein the volume of flow is determined from the depth of fluid in a pipe together with the average velocity of flow through the pipe as determined by detecting the...
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4914956 |
Method and circuit for processing sensory input signals of the type obtained from coriolis mass flow rate sensors and the like
An improved method and circuit for processing sensory input signals of the type obtained from Coriolis mass flow rate sensors and the like including differencing circuitry responsive to inputs...
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H000608 |
Detecting multiple phase flow in a conduit
Multiple phase flow is detected and characterized in a fluid-containing conduit using a compressional wave acoustic transducer in the pulse-echo mode. The acoustic energy is transmitted in a...
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4744367 |
Apparatus for measuring blood flow speed using an ultrasonic beam
An ultrasonic diagnosis apparatus comprises a probe for transmitting an ultrasonic beam toward a body having a blood vessel therein and a plurality of receiver circuits corresponding to sampling...
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4660153 |
Fuel supplying apparatus
A fuel supplying apparatus comprises a fuel supplying nozzle having an opening and closing valve, a fuel supplying arrangement for supplying a fuel to the fuel supplying nozzle, a nozzle hook onto...
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4644483 |
Apparatus for determining the transit time of ultrasonic pulses in a fluid
An apparatus for determining the transit time of ultrasonic pulses in a fluid has two spaced apart electro-acoustic converters (11, 20). A transmitter signal proportional to the sound pressure is...
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4557148 |
Ultrasonic flowmeter
An ultrasonic flowmeter comprising a signal generator for supplying a synchronizing signal to an ultrasonic propagation path and a frequency division time signal to a flow rate computing unit; the...
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4556067 |
Bandwidth indicator for Doppler blood flowmeters
The analog broadband output signal of a medical Doppler device is sampled at a constant rate to convert the signal to digital form. The sample values are stored consecutively in a random access...
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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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4425805 |
Respiration flowmeter
At a pair of recesses formed on an inner wall of a conduit along a line slanted with respect to the flow direction of a respiration gas flowing through the measuring conduit, a pair of ultrasonic...
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4386409 |
Sewage flow monitoring system
A sewer flow monitoring system wherein the depth of fluid in a pipe is measured in pairs of transmitter-receiver ultrasonic ranging transducers. Each measurement sample is tested against a selected...
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4372168 |
Flowmeter
An ultrasonic flowmeter including two phase locked loops with four voltage controlled oscillators, a portion of each loop forming a common path through amplifiers, an electronic attenuator with...
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4308754 |
Ultrasonic flowmeter
An ultrasonic flowmeter for determining fluid flow velocity within a conduit by determining the difference in transit time between interrogating ultrasonic pulses transmitted upstream between a...
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4232548 |
Liquid flow meter
A sonic flow meter for measuring the rate of flow of a fluid within an enclosed axially elongated hollow conduit is disclosed. First and second transducers are secured to the exterior surface of...
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4202211 |
Flow measuring system
In order to enable measurement of liquid flow through channels noninvasively without contact or interference with the flow through the channel, detectors of liquid level and velocity through the...
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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...
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4062237 |
Crossed beam ultrasonic flowmeter
A crossed beam ultrasonic flowmeter particularly suited for measuring two dimensional arterial blood flow has two pairs of ultrasonic beam transmitting transducers the beams of which are focused to...
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4011755 |
Acoustic flowmeter
In the acoustic flowmeter apparatus disclosed herein, repetitively gated bursts of relatively high frequency acoustic energy are transmitted between upstream and downstream transducers in a conduit...
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3991603 |
Moisture indicating apparatus
A moisture indicating apparatus for indicating the presence of moisture in a vapor flow confined within a conduit. Sonic energy generated within the conduit is detected at predetermined locations...
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RE28686 |
Measurement of fluid flow rates
Apparatus and a method for measuring the flow rate of a fluid in which a beam of ultrasonic ≮, electromagnetic, optical or other radiant.]. energy is transmitted across the flow at each of two...
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3844170 |
FLOW VELOCITY MEASUREMENT
A method of detecting the velocity of a flow which comprises deriving from each of a first pair of positions spaced apart in the direction of flow a signal corresponding to radiative noise in the...
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3402606 |
Fluid velocity measuring system
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