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7383731 |
Deep-fry oil quality sensor
A cooking oil quality sensing apparatus and system includes an acoustic wave sensor composed of one or more acoustic wave transducers configured upon a piezoelectric substrate such that when the...
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7360399 |
Apparatus for measuring a density and/or a viscosity of a fluid
The apparatus includes a sample tank for collecting and quieting a volume fraction of the fluid to be measured. The sample tank is in communication, at least at times, with a fluid containment via...
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7357016 |
Process and device for determining viscosity
A process and a device for determining the viscosity of a fluid are proposed. Very simple and accurate determination is enabled in that the magnetic particles in the fluid are set into vibration by...
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7350367 |
Environmental control system fluid sensing system and method
A system for monitoring a fluid in an environmental control system includes a mechanical resonator positioned for contacting a thermal change fluid. In some embodiments, the mechanical resonator is...
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7334452 |
Method for characterizing materials by using a mechanical resonator
Methods for monitoring a fluid composition include placing a mechanical resonator in the fluid composition and oscillating the resonator. The resonator can be a tuning fork resonator having tines...
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7254990 |
Machine fluid sensor
A sensor for sensing one or more properties of a vehicle fluid has a tuning fork resonator adapted to contact the fluid. The tuning fork resonator comprises two tines and is operable to oscillate...
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7228728 |
Method for determining rheological parameters of a fluid
The inventive method uses the ultrasound Doppler method (UVP) in order to determine a local velocity profile perpendicular to a line for a fluid which flows through said line, carrying suspended or...
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7219537 |
Control of equivalent shear rate in acoustic wave sensors
An apparatus and a method for controlling the shear rate at which an acoustic wave device measures viscosity, by utilizing an automatic level control or an automatic gain control circuit to control...
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7219536 |
System and method to determine oil quality utilizing a single multi-function surface acoustic wave sensor
A method and system for detecting oil quality. The quality of engine oil can be determined utilizing an acoustic wave sensor to obtain viscosity and corrosivity data associated with the engine oil....
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7207211 |
High throughput microbalance and methods of using same
A method and apparatus for measurement of mass of small sample sizes. The method and apparatus is particularly adapted for providing microbalance measurement of solid materials as part of a...
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7204129 |
Real-time system for detecting foreign bodies in food containers using ultrasound
An ultrasound system determines the presence of a foreign object in a container of fluid by measuring echo signals from the outer surface of the container and the inner surface of the container....
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7201041 |
Analysis method using piezoelectric resonator
A piezoelectric resonator is immersed in a liquid, an AC signal is applied, and a local maximum of the conductance is determined. A frequency change due to the viscosity effect is determined from...
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7191639 |
On-chip magnetic force actuation of microcantilevers by coplanar coils
An on-chip coil is provided in a micromachined device for magnetic actuation of a nanoelectromechanical microcantilever. The novel geometry involves a three dimensional solenoid or planar coil...
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7191638 |
Device for determining and/or monitoring at least one physical parameter and having a piezo-drive for oscillation-excitation and -detection
A device for determining and/or monitoring at least one physical parameter of a medium, having at least one mechanically oscillatable unit and at least one drive-/receive unit. The drive-/receive...
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7181957 |
Measurement, compensation and control of equivalent shear rate in acoustic wave sensors
A method for controlling the shear rate at which an acoustic wave device measures viscosity by calculating the shear rate as a function of the characteristic rate of quartz movement in response to...
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7162918 |
Method and apparatus for downhole fluid characterization using flexural mechanical resonators
The present invention provides a downhole method and apparatus using a flexural mechanical resonator, for example, a tuning fork to provide real-time direct measurements and estimates of the...
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7114373 |
Fluid monitoring
An apparatus for measuring the viscosity and temperature of a fluid, for example an engine oil, comprises a transducer, which is arranged to vibrate when provided with a drive signal to produce an...
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7111500 |
Analysis method using piezoelectric resonator
A piezoelectric resonator is immersed in a liquid, an AC signal is applied, and a local maximum of the conductance is determined. A frequency change due to the viscosity effect is determined from...
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7073370 |
Method and apparatus for characterizing materials by using a mechanical resonator
A method and apparatus for measuring properties of a liquid composition includes a mechanical resonator, such as a cantilever, connected to a measurement circuit. The mechanical resonator can be...
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7059176 |
Resonant tube viscosity sensing device
A method and device for assessing the viscosity of a fluid. The method and device utilize a tube with a vibrating freestanding portion into which the fluid is introduced, and relies on sensing the...
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7055377 |
Quartz crystal sensor cell
A quartz crystal sensor cell in which the sensor is secured to the base of a well defining a test sample space by a layer of adhesive between the respective peripheral surfaces. Also a quartz...
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7043969 |
Machine fluid sensor and method
A method for analyzing a fluid contained within a machine, comprising the steps of providing a machine including a passage for containing a fluid; placing a sensor including a mechanical resonator...
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7036355 |
Viscometer
The viscometer provides a viscosity value (X η ) which represents the viscosity of a fluid flowing in a pipe connected thereto. It comprises a vibratory transducer with at least one flow tube for...
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7024917 |
Method and apparatus for an acoustic pulse decay density determination
An acoustic transducer is in contact with a near wall that has a much different acoustic impedance than a fluid. The transducer transmits an acoustic pulse into into the wall (such as a plate, a...
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7017424 |
Vibratory transducer
To conduct a fluid, the transducer has a flow tube which in operation is vibrated by an excitation assembly and whose inlet-side and outlet-side vibrations are sensed by means of a sensor...
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7017394 |
Tear film osmometry
Osmolarity measurement of a sample fluid, such as tear film, is achieved by depositing an aliquot-sized sample on a sample receiving substrate. The sample fluid is placed on a sample region of the...
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7010963 |
Liquid detecting apparatus
Piezoelectric plates conduct bending vibrations and are axially symmetrical about the vibration shaft so the piezoelectric plates conduct a bending vibration, lower vibrating ends of the...
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6957565 |
Method and apparatus for characterizing materials by using a mechanical resonator
A method for measuring properties of a fluid that includes oscillating a tuning fork resonator in a fluid. The invention is particularly suitable for in-line monitoring of various physical and...
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6955787 |
Integrated biological and chemical sensors
An array of piezoelectric resonators used in a sensor device in order to identify chemical and biological agents. The resonators can operate as bulk acoustic wave (BAW), surface acoustic wave...
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6951128 |
Polymeric solutions rheometer
A method for determination of the extensional rheological properties of a liquid comprises application to a sample of liquid in a closed system of a pulsed oscillatory alternating flow in a...
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6945094 |
Viscosity measurement
The present invention relates to a method and apparatus of determining the rheological properties of a polymer flowing in a conduit. The invention provides a method of characterising a polymer...
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6945089 |
Mass-sensitive sensor
In a mass-sensitive sensor consisting of an acoustic surface wave component on the basis of shear waves, the sensor includes a substrate with an active surface carrying two different layers, one...
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6938462 |
Device for measuring viscosity and/or density
A device for measuring the viscosity and/or the density of a fluid using a resonator capable of mechanical vibrations. The resonator is capable of being brought into contact with the fluid. An...
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6935164 |
Refiner control
In the present invention a refiner ( 108 ) of a mechanical pulping line is supplied with a controllable acoustic source ( 14 ), arranged for emitting acoustic signals into the pulp fluid. The...
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6925856 |
Non-contact techniques for measuring viscosity and surface tension information of a liquid
A non-contact method for measuring viscosity and surface tension information of a liquid in a first liquid containment structure. The steps of the method include oscillating a free surface of the...
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6877362 |
METHOD AND DEVICE FOR EVALUATING PROCESSABILITY OF VISCOELASTIC MATERIAL, METHOD FOR SETTING CONDITION FOR PROCESSING VISCOELASTIC MATERIAL, AND DEVICE FOR PROCESSING VISCOELASTIC MATERIAL; AND METHOD FOR CONTROLLING PROCESSING OPERATION OF VISCOELASTIC MATERIAL
A method and a device evaluate a processability of a viscoelastic material. A measuring step and means measure a complex viscosity modulus η* and two complex elasticity moduli G*1, G*2 in...
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6848299 |
Quartz crystal microbalance with feedback loop for automatic gain control
An analytical apparatus, such as a quartz crystal microbalance, comprises a piezoelectric sensor and an oscillator circuit, coupled to the sensor, to oscillate at a frequency substantially...
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6840109 |
Vibratory transducer
To conduct a fluid, the transducer has a flow tube which in operation vibrated by an excitation assembly. Inlet-side and outlet-side vibrations of the flow tube are sensed by means of a sensor...
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6763698 |
Self calibrating system and technique for ultrasonic determination of fluid properties
A system and technique for determining fluid properties includes an ultrasonic transducer 30 on a first surface 42 of a solid member 40 . An opposed second surface 44 of the member 40 is...
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6755073 |
Sensor for measuring the viscosity of a liquid
A sensor for measuring the viscosity of a fluid, which has an oscillator. The oscillator is dipped into the fluid. The surface of the oscillator is provided with a dirt-repellent coating.
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6722200 |
Apparatus and method for ultrasensitive nanoelectromechanical mass detection
The invention relates to the application of the techniques of nanoelectromechanical systems (NEMS) to ultrasensitive mass detection. A pulsed flux of atoms is adsorbed onto the surface of a 32.8...
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6684683 |
Method and apparatus for characterizing the barrier properties of members of combinatorial libraries
A method and an apparatus for characterizing the barrier properties of an array of coatings. The method including providing a plurality of acoustic wave devices, wherein each of the plurality of...
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6675112 |
Cure monitoring
A method and apparatus for monitoring the progress of the solidification of a solidifying material involves using a transmitter to transmit a relatively low frequency compression wave to the...
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6668621 |
Viscosity measurement by means of damped resonant vibration normal to an approximate rigid plate
A brief but intense magnetic impulse generated by a coil 42 is used to excite resonant bending mode vibration in a magnetically permeable cantilevered beam 2 immersed in a fluid 22. A...
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6656280 |
Resist recycling apparatus and method for recycling the same
A resist recycling apparatus includes a viscosity control tank supplied with wasted resist liquid; a solvent tank that supplies a solvent to the viscosity control tank; a viscometer that measures...
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6602714 |
Viscosity and mass sensor for the high-throughput synthesis, screening and characterization of combinatorial libraries
Workstation, apparatuses and methods for the high-throughput synthesis, screening and/or characterization of combinatorial libraries. The invention relates to an array, which permits various...
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6591664 |
Method and arrangement for measuring characteristics of a non-newtonian fluid
To measure characteristics of a non-Newtonian fluid, preferably blood, a non-magnetic container is provided for receiving the fluid. A magnetic body is contained in the container, and a winding is...
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6543274 |
Sensor array and method for determining the density and viscosity of a liquid
A sensor arrangement for ascertaining the density and the viscosity of a liquid is proposed, having an arrangement comprising at least two basic sensor elements, at least one of which can be wetted...
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6523397 |
Curing characteristics measuring apparatus and measuring method
A curing characteristics measuring apparatus in which a sample chamber having a fixed surface and a rotation-vibrating drive surface is charged with a sample having a viscoelasticity, a torsional...
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6503568 |
Resist coating and recycling method
This invention provides a resist recycling apparatus and the method for resist recycling. A resist recycling apparatus includes a viscosity control tank being supplied with wasted resist liquid, a...
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