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8176772 |
Piezoelectric sensor and sensing instrument
A piezoelectric sensor senses a substance to be measured in a sample solution, thereby conducting high-precision measurement. A pressing member has a solution storage space with a bottom surface...
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8171795 |
Self-exciting, self-sensing piezoelectric cantilever sensor for detection of airborne analytes directly in air
A method for detection of airborne biological agent using a piezoelectric cantilever sensor that includes a piezoelectric layer and a non-piezoelectric layer. A recognition entity is placed on one...
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8146406 |
Vibrating transmitter for consistency measurement
The invention relates to a transmitter for consistency measuring of pulp suspensions at first hand, comprising a measuring body (1), shaped such as a blade, suspended in a vibration-producing...
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7942056 |
Self-exciting, self-sensing piezoelectric cantilever sensor
A piezoelectric cantilever sensor includes a piezoelectric layer and a non-piezoelectric layer, a portion of which is attached to the piezoelectric layer. In one embodiment, one end of the...
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7935191 |
Controlling accumulation of select adsorbers on a piezoelectric cantilever sensor
The techniques described herein are directed to removing material that has attached to or preventing material from attaching to the surface of a piezoelectric cantilever. The material can be a...
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7878044 |
Sensor, system, and method, for measuring fluid properties using multi-mode quasi-shear-horizontal resonator
A system and a method for providing information on two of the three variables, density (ρ), viscosity (η), and elastic modulus (c) of a fluid, such that independent knowledge of one variable a...
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7878047 |
Monitoring particles in a fluid stream
There is described an apparatus for monitoring particles in a fluid stream, comprising a body portion and a detector element that is acoustically decoupled from the body portion. The detector...
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7739911 |
Ultrasonic characterization of solid liquid suspensions
Using an ultrasonic field, properties of a solid liquid suspension such as through-transmission attenuation, backscattering, and diffuse field are measured. These properties are converted to...
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7694552 |
High quality factor resonators for liquid immersion biological and chemical sensors
A mechanical resonator capable of providing an intrinsically high mechanical quality factor in immersion is provided. The resonator includes a membrane attached at its perimeter to a frame, such...
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7677087 |
Quartz sensor and sensing device
Provided is a Angevin type quartz sensor which is high in measurement sensitivity, suppresses the influence of the surface tension of a sample solution during measurement, and enables an installed...
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7661293 |
Ultrasonic system for detecting and quantifying of air bubbles/particles in a flowing liquid
A system using ultrasonic energy for detecting and quantifying air bubbles and/or particles in a liquid flowing in a tube by a non-invasive and non-destructive technique has an ultrasonic sensor...
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7661294 |
Non-invasive multi-function sensor system
An integrated multi-function sensor system has a head having a slot to accept a tube of a deformable material and a plurality of sensor elements mounted in the walls of the head slot to confront a...
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7581446 |
Methods, systems, and computer program products for determining a property of construction material
Methods, systems, and computer program products for determining a property of construction material. According to one aspect, a material property gauge operable to determine a property of...
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7578203 |
System for sand detection at constrictions or flow obstacles in a pipe or similar
This invention relates to a system for measuring solid particles, e.g. sand, in a fluid flow in a pipe, comprising at least one acoustic sensor for registering acoustic signals generated from...
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7543476 |
Rupture event sensors
An apparatus for separating an analyte from a mixture or for detecting an analyte or for determining the affinity, or a property related to affinity, between binding partners includes: a) a surface...
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7523649 |
Method and apparatus for ultrasonic determination of hematocrit and hemoglobin concentrations
An ultrasonic field-portable system for accurately measuring hematocrit (HCT) and hemoglobin concentration (HGB) in small food samples. The system includes an analyzer (10) that allows extremely...
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7503217 |
Sonar sand detection
Methods and apparatus for detecting particles flowing in a fluid within a conduit involve analysis of acoustic pressure signals detected with an array of at least two pressure sensors. The analysis...
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7500379 |
Acoustic wave array chemical and biological sensor
An acoustic wave sensor array device is provided for the detection, identification, and quantification of chemicals and biological elements dispersed in fluids. The sensor array device is capable...
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7458265 |
Piezoelectric cantilever sensors
A piezoelectric cantilever with a non-piezoelectric, or piezoelectric tip useful as mass and viscosity sensors. The change in the cantilever mass can be accurately quantified by monitoring a...
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7437907 |
Sensor for detecting substance in liquid and apparatus for detecting substance in liquid using the same
In a sensor for detecting a substance in liquid, recesses are provided in the upper surface of a base substrate. The recesses respectively accommodate SAW elements. A resin layer having openings is...
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7409851 |
Detection of small bound mass
Prefabricated catalyzing adsorption sites are incorporated into small oscillators. In one embodiment, the sites are formed of precisely positioned gold anchors on surface micromachined oscillators....
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7398671 |
Micromechanical sensor element
A micromechanical sensor element for recording the bonding of molecules to the micromechanical sensor element. The sensor element having a substrate and at least one electrical terminal. There is...
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7389673 |
Sensor for detecting analyte in liquid and device for detecting analyte in liquid using the same
A sensor for detecting an analyte in liquid includes a base substrate provided with openings and electrode lands on one surface thereof and SAW elements each provided with a sensing portion having...
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7373805 |
Apparatus for directing particles in a fluid
There is disclosed apparatus for directing particles entrained in a fluid, comprising a chamber having a first wall, including means for generating a sound wave having a frequency v, and a second,...
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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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7266990 |
Flexural plate wave sensor and array
A method for manufacturing a flexural plate wave sensor includes the steps of depositing an etch-stop layer over a substrate, depositing a membrane layer over the etch stop layer, depositing a...
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7260482 |
Ultrasonic characterization of high concentration particles
A method for characterizing a suspension with particles floating therein, which method comprises the steps of generating an acoustic actuation signal and registering an acoustic reflected signal....
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7171844 |
Apparatus and method for measuring the mass of a substance
An apparatus for measuring the mass of a substance includes a sensor having a membrane layer, the membrane for receiving the substance thereon, an oscillator device for driving the membrane at a...
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7165452 |
Measuring method, measurement-signal output circuit, and measuring apparatus
A measuring apparatus for detecting a change in frequency of a piezoelectric vibrating reed is realized with a simple circuit. The circuit of the measuring apparatus includes a phase lock loop...
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7140239 |
System and technique for ultrasonic characterization of settling suspensions
A system for determining properties of settling suspensions includes a settling container, a mixer, and devices for ultrasonic interrogation transverse to the settling direction. A computer system...
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7114375 |
Process monitoring and particle characterization with ultrasonic backscattering
A fermention process is monitored by detecting ultrasound backscattered from the cells as a function of time. A transducer 46 is placed in a fermentor 30 and transmits ultrasound towards a...
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7096719 |
Apparatus for measuring parameters of a flowing multiphase mixture
An apparatus 10 is provided that measures the speed of sound propagating in a multiphase mixture to determine parameters, such as mixture quality, particle size, vapor/mass ratio, liquid/vapor...
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7093482 |
System and method for detecting particles
An acoustic detector based on rupture event scanning (“REVS”) with a detection setup allowing the monitoring of REVS signals near the driving frequency and with optimized impedance matching bet...
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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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7069776 |
Method for measuring particle concentration during injection pumping operations
In a well bore operation in which a particulate is added to a fluid stream, a method of determining the concentration of said particulate in said fluid stream comprising the steps of measuring the...
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7072044 |
Apparatus for acoustic detection of particles in a flow using a fiber optic interferometer
Fiber optic particle detector for measurements in a fluid flow, comprising an optical fiber (2,3,12) being acoustically coupled to a mechanical element (11,13,14) adapted to be acoustically coupled...
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7036375 |
QCM sensor and QCM sensor device
A plurality of quartz crystal resonators having different resonance frequencies are connected in parallel. A combined admittance of the resonators is measured. Equivalent circuit constants of all...
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7028538 |
Sand monitoring within wells using acoustic arrays
A method for detecting the presence of particles, such as sand, flowing within a fluid in a conduit is disclosed. At least two optical sensors measure pressure variations propagating through the...
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6959589 |
Ultrasound analysis of slurries
An autoclave reactor allows for the ultrasonic analysis of slurry concentration and particle size distribution at elevated temperatures and pressures while maintaining the temperature- and...
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6945096 |
Measurement and control of asphaltene agglomeration in hydrocarbon liquids
A method is provided for measuring the agglomerative state of asphaltenes in oil by applying an acoustic signal to the oil, detecting the scattered acoustic energy and using this detected signal to...
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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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6942782 |
Method and apparatus for measuring deposit forming capacity of fluids using an electrochemically controlled pH change in the fluid proximate to a piezoelectric microbalance
A method and apparatus for measuring the deposit forming propensity of a continuously flowing fluid having a bulk pH of about 1 to about 12 comprising measuring the rate at which deposit forms on a...
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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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6935165 |
Microscale sensor element and related device and method of use
A monitoring apparatus useful in detecting viability of biological cells. A substrate defines a microscopic chamber. One or more microcantilevers extend from the substrate into the chamber. A...
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6910367 |
Method for determining particle size distribution and structural properties of concentrated dispersions
A method is described which applies Acoustic Spectrometry to characterize both the particle size distribution and micro-rheological properties of the structured concentrated dispersions. It...
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6874356 |
Method and device for monitoring and controlling a process
A method and device for monitoring and controlling a pharmaceutical, chemical or food process, in which the biological activity and/or the bio-mass of micro-organisms in the process is monitored,...
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6862536 |
Measuring system and a method for measuring particle velocity and/or particle velocity distribution and/or particle size distribution
Measuring systems and methods measure particle velocity and/or particle velocity distribution and/or particle size or particle size distribution. The measuring system includes a filter for...
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6826949 |
Method and apparatus for guiding a liquid sample towards a sensing surface
A liquid sample sensing device comprises a set of stackable liquid sample base units that are adapted to be stacked together to form multiple sample volumes that are substantially sealed, each with...
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6796195 |
Apparatus for determining particle size
The invention provides a method and an apparatus for measuring the size, concentration and size distribution of particles in a fluid by determining the characteristics of an acoustic speckle signal...
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6748815 |
Method for determining particle size
The invention provides a method and an apparatus for measuring the size, concentration and size distribution of particles in a fluid by determining the characteristics of an acoustic speckle signal...
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