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5345811 |
Fluid density sensor and system
A sensing element and system for determining the density of fuel housed in the tank of an aircraft, includes sensing element (10). The sensing element has a disc shaped member (20) extending...
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5332550 |
Aerosol sampler
An aerosol sampler comprises at least one U-tube whose ends are fixed to a support, and through which the aerosol is caused to flow. Means are provided to set the tube vibrating, and to measure its...
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5323638 |
Sensor apparatus
A sensor, for use in determining physical properties of fluid, comprises a flexible diaphragm having a plane. Two tines depend from the diaphragm substantially at right angles to the plane. First...
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5295084 |
Vibrating tube densimeter
A Coriolis effect densimeter which produces density output data of improved accuracy by embodying the principal that the natural frequency of a vibrating tube filled with material decreases with an...
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5271267 |
Method and apparatus for determining fluid properties from sonic/temperature fluid signature
A method and apparatus for non-intrusively identifying a property of a fluid in a container or pipe. The method includes propagating, from a transmitter, sonic energy into the fluid in the...
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5253522 |
Apparatus for determining fluid level and fluid density
A density measuring device having a float with a marker provided therein that is connected by a pair of springs to each of the two supports which are on opposite sides of the float along a guide. A...
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5253533 |
Mass flow meter
A mass flow meter for flow media which works primarily on the Coriolis Principle has a pipe inlet, a straight pipe carrying the flow medium, a pipe outlet, an oscillation generator operating on the...
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5237853 |
Method and apparatus for measuring the density of a liquid
A process for monitoring fluid density by use of a fluidic jet oscillator (26) absent the necessity for a high-precision pressure regulator. Fluid is delivered to the fluidic oscillator (26) via a...
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5218858 |
Thin rod flexural acoustic wave sensors
A flexural acoustic wave sensing method and efficient, simple, miniature and economical ultrasonic devices using thin rods are presented. The diameter of the thin rod is less than one acoustic...
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5214955 |
Constant frequency pulsed phase-locked loop measuring device
A measuring apparatus uses a fixed frequency oscillator to measure small changes in the phase velocity ultrasonic sound when a sample is exposed to environmental changes such as changes in...
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5201215 |
Method for simultaneous measurement of mass loading and fluid property changes using a quartz crystal microbalance
A method, using a quartz crystal microbalance, to obtain simultaneous measurement of solid mass accumulation and changes in liquid density-viscosity product. The simultaneous real-time measurements...
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5157962 |
Vibratory viscometer transducer with isolation support for inline viscosity sensor
A viscosity measuring transducer especially useful for process control of fluids. The transducer oscillates an immersed blade sensor in the direction of the plane of the blade in order to maximize...
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5117146 |
Acoustic wave device using plate modes with surface-parallel displacement
Solid-state acoustic sensors for monitoring conditions at a surface immersed in a liquid and for monitoring concentrations of species in a liquid and for monitoring electrical properties of a...
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5078011 |
Method of monitoring parameters of solid phase of suspension and device therefor
This invention relates to measurements of characteristics of a comminuted material by an ultrasonic method. The method of monitoring parameters of a solid phase of suspension comprises the steps of...
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5074148 |
Resonance frequency liquid level sensor
A liquid level sensor comprises an elongated tubular member with two open ends contained in an elongated cylindrical container vessel in an arrangement wherein the two extremities of the elongated...
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5048323 |
Fluid metering
A gas flow correction sensor for producing an output signal proportional to the ratio between line pressure and line temperature for gas flowing in a line, for use in correcting the output of a...
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5025656 |
Densitometer
A densitometer (10) provides a chamber (24) within which a ferromagnetic bob (27) is shuttled back and forth by alternate driving of two coils (32 and 34). Measurement circuitry (FIG. 2) determines...
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5005400 |
Dual frequency density meter
An apparatus for measuring density of media moving through a conduit included therein comprises one or two vibrating sections under two different flexural vibrations vibrating at two different...
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5000050 |
Mass-flow sensor using aerodynamic damping
A fluid mass flow sensor uses the effect of aerodynamic drag on a vibrating object. The drag damps the resonance oscillations of the vibrator in an amount proportional to the mass flow. An...
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4996871 |
Coriolis densimeter having substantially increased noise immunity
Apparatus and accompanying methods for use therein for a Coriolis mass flow rate meter which is substantially immune to noise, and more particularly, to such a meter that is substantially...
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4996656 |
Densitometer with remotely disposed control electronics
A fluid density measuring device or densitometer computes, electronically, the density of a fluid by measuring the resonant frequency of an excitation signal provided to a density transducer (11)...
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4991124 |
System and method for ultrasonic determination of density
A method and system determines the density of a liquid, such as aircraft fuel, by measuring the amplitude of the reflections of ultrasonic pulses from the faces of the walls of a reference...
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4962671 |
Single vibrating tube transducers
A single vibrating tube transducer comprises a tube (4) held between two nodal masses (6) which are attached to the tube (2) close to their respective centers of gravity (16). Each nodel mass (6)...
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4959228 |
Measurement of specific gravity during fermentation
A method of determining the specific gravity of a fermentable liquor during fermentation is disclosed. Specific gravity is determined from measurements of original gravity, velocity of sound, and...
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4958332 |
Damping device for sonic waveguides
A damping device for damping mechanical vibrations in a small diameter elongated member, such as a waveguide carrying torsional strain waves, includes a damping material contained inside a housing...
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4934177 |
Solute concentration measurement apparatus
Solute concentration measurement apparatus comprises a container (1) for a solution together with an ultrasonic transmitter (2) and receiver (3). A signal from the transmitter (2) passes through...
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4922745 |
Fluid transducer
A transducer for measuring a parameter of a fluid, such as density or viscosity, comprises two generally parallel tines extending from a common yoke, forming a tuning fork adapted to be immersed in...
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4912962 |
Method of detection of oscillation period for oscillatory densimeter
An oscillation period of an oscillating tube of an oscillatory densimeter is detected while the oscillation of the oscillating tube is maintained by applying an external force in the form of a...
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4909068 |
Device for detecting viscosity or specific gravity of liquid
A device for detecting the viscosity or specific gravity of liquid has a vibrator, a vibration transmission shaft provided thereon with the vibrator and adapted to transmit the vibration of the...
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4893496 |
Torsional wave fluid sensor and system
A guided torsional wave sensor has a cross-section with a strong interaction of torsional wave energy and the surrounding fluid, such that a wave propagates in the sensor with a functional...
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4890480 |
Relating to devices for measuring fluid density
A device for measuring fluid density, the device comprising a silicon substrate having a micro-engineered cantilevered beam fabricated on it for use as a density sensor. The beam is at the end of a...
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4876879 |
Apparatus and methods for measuring the density of an unknown fluid using a Coriolis meter
Apparatus and accompanying methods for implementing both an accurate densimeter and a net oil computer utilizing a common Coriolis meter assembly is described. This apparatus measures density of an...
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4872335 |
Vibrating type transducer
A vibrating transducer for detecting the resonant frequency of a vibrating diaphragm and using that frequency to determine the pressure or density of a fluid contacting the diaphragm. The device...
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4854172 |
Method and apparatus for measurement of density profiles in wood composites, using acoustic emission
Method and apparatus for evaluating the density profile of a wood-derived specimen. A sample of the material is mounted on a lathe and rotated at high speed. An acoustic emission transducer is...
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4848139 |
Determining amount of biological material
Apparatus for determining the amount of biological material in a fluid medium, typically the concentration of bacteria in a fermentation chamber, has a test cell through which a medium can be...
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4838084 |
Density measuring instrument
A density measurement instrument measures the density of a fluid by determining the frequency of oscillation of a vibrating tube filled with the fluid. An electronic excilation system vibrates the...
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4827746 |
Sampling method for oscillatory densimeter
An oscillation period of an oscillating tube of an oscillatory densimeter is detected while liquids of which densities are to be measured are introduced into the oscillating tube. When the...
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4815323 |
Ultrasonic fuel quantity gauging system
A method of measuring aircraft fuel quantity and density in a fuel container using an ultrasonic transducer; a stillwell liquid fuel; a computer control, an indicator and an altitude sensor. The...
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4811592 |
Specific gravity detector
A specific gravity detector includes an electromechanical vibrator having a central axis and capable of vibrating about the central axis, a transmission shaft having one end thereof connected...
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4803867 |
Fluid measurement apparatus providing flow tube strain relief
A fluid meter, such as a density meter or a Coriolis-type mass flow meter is disclosed in which the fluid tube is mounted to allow for expansion and contraction relative to a base to which opposite...
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4802360 |
Vibrating spool densitometer immune to cabling effects
Apparatus for use with a densitometer having a probe with an output and a probe driver for driving the probe includes a loop circuit coupled between the probe output and the probe driver. An...
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4796468 |
Apparatus for measuring fluid density
Apparatus for use in measuring fluid density comprises a fluid carrying helical sample tube 50 made of a conductive material for passing current therethrough. A cylindrical coil fixing sleeve 58...
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4788466 |
Piezoelectric sensor Q-loss compensation
There is disclosed Q-loss compensation apparatus for a piezoelectric sensor such as a quartz crystal microbalance or other resonant vibratory device wherein the vibration amplitude of the device is...
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4783987 |
System for sustaining and monitoring the oscillation of piezoelectric elements exposed to energy-absorptive media
The disclosed system includes a piezoelectric crystal exposed to an energy-absorptive medium of interest. A crystal oscillation circuit is included for sustaining oscillation of the crystal in...
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4770042 |
Suspension stability monitoring apparatus
Suspensions, emulsions and the like are monitored with apparatus which pulses ultrasonic waves through a suspension at elevations from bottom to top along a column of such suspension to determine...
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4770043 |
Monitoring the stability of solids containing suspensions and the like
Suspensions, liquid emulsions and the like are monitored with ultrasonic waves from bottom to top of a column of such to determine if there has been alteration in the original compositions thereof,...
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4754640 |
Apparatus and method for determining the viscoelasticity of liquids
A rheometer for determining the viscoelasticity of a liquid from the mechanical impedance which the liquid presents to an oscillating surface. The incremental power required to maintain a fixed...
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H000336 |
Non-destructive method to assess physical condition of chemical fill
This invention relates to a method for assessment of the condition, and cge of condition, of the liquid fill for chemical projectiles by analyzing the vibrational characteristics of the projectile...
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4691557 |
Acoustic coupling assembly with retaining connector for noninvasive sensing of sampling chamber fluid
A fluid sampling chamber assembly for noninvasive sensing of a fluid having a chamber with a sensor wall for acoustic coupling therewith, an apparatus for coupling a transducer of a transducer...
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4683752 |
Ultrasonic probe
An ultrasonic probe for measuring the velocity of sound in a liquid consists of a tube (12), closed at its lower end, and arranged to extend into the liquid, a reflector (20) alongside the tube but...
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