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Class 324/634 - To determine water content


Subclass of Class 324 - Electricity: measuring and testing
Definition: Subject matter wherein the analyzed parameter of a substance
No. of patents: 64
Last issue date: 05/29/2012


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NumberTitleIssue Date
8188751Method and measuring instrument for measuring water content
For measuring the water content of a web in the wire section of a paper machine, at least one radiofrequency-operated resonator sensor forms an electric near field, in which a web affects the resonance frequency of each resonator sensor. The water content of the web...
05/29/2012
8044669Admittance meter for monitoring a medium
An admittance meter having an electrical alternating signal source, a diode ring operated as a synchronous rectifier with at least four diodes connected in series and in the same direction in succession, a measuring sensor, and an evaluation unit. The diode ring is ...
10/25/2011
8008928Apparatus and method for the measurement of mass and/or moisture of dielectric objects
An apparatus for the measurement of mass and/or moisture of dielectric objects, with an analysing unit, at least one high frequency generator, at least one high frequency detector and with a high frequency resonator, wherein the at least one high frequency generator...
08/30/2011
7755368Method and device for measuring mass and/or moisture of the content of capsules
A Method and an apparatus for measuring the mass and/or moisture of the contents of incompletely filled capsules, containing, in particular, medicinal products, pharmaceutical products, vitamins and similar products, with the aid of microwaves is disclosed. The disp...
07/13/2010
7560937Microwave sensor for measuring the moisture of masonry surfaces comprising a microstrip resonator coupled with an open coaxial probe
The measurement device includes a microwave sensor, a microwave analyzer which is essentially composed of a microwave signal generator and a microwave power meter, and a processing unit to which the analyzer is interfaced. The sensor 3 includes a resonator
07/14/2009
7330034Moisture measurement system for seed cotton or lint
A process for measuring the moisture content and the mass-moisture content of materials is presented that requires no air reference or calibration sequence. A microwave signal is split into a reference and a transmission signal, and the reference signal is applied d...
02/12/2008
7289216Station for inspecting the painting of motor vehicle parts
A station for inspecting the painting of motor vehicle bodywork parts, the station including an optical measuring apparatus and means for attenuating vibration of the moving parts. ...
10/30/2007
7285963Method and system for measurement of dielectric constant of thin films using a near field microwave probe
A measurement technique based on a microwave near-field scanning probe is developed for non-contact measurement of dielectric constant of low-k films. The technique is non-destructive, non-invasive and can be used on both porous and non-porous dielectrics. The techn...
10/23/2007
7278186Ultra low frequency moisture sensor
An apparatus for measuring a moisture content value within a volume. A frequency generator generates at least one source signal at frequencies of no more than about one kilohertz. Probes are disposed with surfaces in physical contact with the volume, where no direct...
10/09/2007
7276916Method and arrangement for measuring conductive component content of a multiphase fluid flow and uses thereof
The present invention relates to a method and an arrangement of measuring conductive component content of a multiphase fluid flow and uses thereof. The claimed device comprises two coils arranged around the pipe containing the fluid to be measured, where the induced...
10/02/2007
7239150Pavement material microwave density measurement methods and apparatuses
A method of obtaining a material property of a pavement material from a microwave field generally includes generating a microwave frequency electromagnetic field of a first mode about the pavement material. The frequency response of the pavement material in the elec...
07/03/2007
7223608Resonance-enhanced dielectric sensing of chemical and biological species
A dielectric sensing method and apparatus are provided for detection and classification of chemical and biological materials. Resonance patterns of a sample within a resonator are detected for identifying a shift in resonance frequency and a change of line width bef...
05/29/2007
7199592Method and apparatus for applying microwaves to measure the moisture content of material
Apparatus for ascertaining the mass and/or the moisture content of successive increments of a running rod containing tobacco and/or filter material for tobacco smoke has a resonator housing with a cylindrical internal chamber which is disposed between an inlet and a...
04/03/2007
7176696Method of detecting and eliminating foreign bodies in a flow of tobacco
In a method of detecting and eliminating foreign bodies in tobacco, a flow of tobacco advances first through a preparation zone where it is gathered into a continuous ribbon of tobacco filler, then through a forming station at which the filler is used to fashion a c...
02/13/2007
7151380Microwave water weight sensor and process
Sensor and process for measuring mass of water on a sheet forming fabric. The sensor includes a microwave element positionable to couple an electromagnetic field into a stock layer to be measured, and a microwave signal generator coupled to the microwave element to ...
12/19/2006
7135869Thickness measuring systems and methods using a cavity resonator
Film thickness measurement systems and methods are provided that utilize a signal generator having a Gunnplexer design and a resonant frequency detector to correlate the shift in resonant frequency experienced by a resonant cavity having one face abutting a test obj...
11/14/2006
7132836Microwave measuring arrangement for product density measurement
The invention relates to a measuring arrangement for measuring the density of a product by means of microwaves. The measuring arrangement comprises a first microwave resonator, from which, in operation, microwaves enter a product area, and a device for compensating ...
11/07/2006
7123024Device comprising a microwave resonator for or on a spinner preparation machine
A device is disclosed, comprising a microwave resonator, for or on a spinner preparation machine with drawing gear (2) for drawing fiber material (FB), in particular a carding, drawing or combing machine, whereby the resonator (30) is embodied for conn...
10/17/2006
7103440Use of microwaves for sensors in the spinning industry
The invention uses microwaves in the spinning industry in order to determine the band mass of an elongated, substantially non-twisted fiber structure. In addition, a method for measuring the sliver mass from the frequency detuning and the damping of resonance signal...
09/05/2006
7078913Multipath resistant microwave moisture sensor
The moisture content of a test material may be determined using a microwave-based process and device which is free from interference by multipath standing waves. Multipath signals may be electronically removed from the measured signal. ...
07/18/2006
7038470Parallel-plate capacitive element for monitoring environmental parameters in concrete
The invention provides a sensor for monitoring an environmental parameter in concrete including an enclosure; a detecting device connected to the enclosure for a detecting at least one environmental parameter in concrete, wherein the detecting device includes at lea...
05/02/2006
6922061Method of detecting foreign bodies in mass streams
The method of detecting foreign bodies in continuous mass streams of fibrous material, strand-like material or material similar to bulk goods with the aid of microwaves, in which the mass flow is led through the field of a microwave resonator and in which the change...
07/26/2005
6897659Device for testing the quality of rope-like materials
A device for testing the quality of rope-like materials in the form of yarns, rollings, fiber bands and the like employs a microwave resonator and devices for determining the displacement of the resonant frequency and the widening of the resonance curve due to the r...
05/24/2005
6853305Air-conduit condensation sensor
A tape-drive condensation sensor includes a probe with first and second spaced-apart electrodes that define a passage for air flow within a pneumatic conduit. A voltage source is coupled between the electrodes and the voltage of the source and the spacing between th...
02/08/2005
6837122Device and method for detecting the mass and the moisture content for spinning preparation machines
The device for measuring the mass and/or the moisture of a material running through a spinning preparation machine is distinguished in that it has a microwave resonator (15, 18) and associated adapted measurement electronics. The method for measuring the mass...
01/04/2005
6747460Microwave-resonator and measuring device
A resonator device for testing a material quantity in the tobacco-processing industry for existence of at least one foreign substance and/or for detecting at least one of weight, density and humidity level of the material includes a resonator housing having a throug...
06/08/2004
6559655System and method for analyzing agricultural products on harvesting equipment
A system for analyzing agricultural products on harvesting equipment includes a test chamber and a near infrared spectrometer disposed within a housing capable of being mounted on the harvesting equipment. A source of near infrared radiation is disposed i...
05/06/2003
6507200Moisture sensor for layers
In a moisture sensor for monitoring the moisture content of layers, at least two parallel electrical conductors connected to a measuring apparatus are disposed adjacent the layers to be monitored. The conductors are surrounded by an insulating material an...
01/14/2003
6476619METHOD AND DEVICE FOR HIGHLY ACCURATE, HIGH SPEED, REAL TIME, CONTINUOUS OR STATIONARY, IN-LINE, NON-INVASIVE, THREE DIMENSIONAL, MULTI-SLICE AND CALCULATIONS OF HOMOGENEOUS OR NON-HOMOGENEOUS FIBROUS YARN, SLIVERS, OR PAD MATERIAL
A method for highly accurate, high speed, multi-slice density and moisture content measurements and calculations of homogeneous or non-homogeneous fibrous material, using a microwave resonator device and computer algorithms. The device is comprised of a c...
11/05/2002
6466035Microwave fluid sensor and a method for using same
A microwave sensor (3) for measuring the relative proportions of fluids is provided. The sensor (3) includes a tube (4) having a length (9) for accommodating the fluids flowing through said tube. The length (9) of the tube (4) makes up a part of the senso...
10/15/2002
6441748Road surface condition monitoring system using sensors disposed under the road
A road surface monitoring system for monitoring the condition of a road surface wherein at least one sensor unit is interchangeably provided in a sealed container disposed below the road surface and a power source is provided to power the sensor unit, and...
08/27/2002
6307380Distance measuring apparatus
While a high-frequency pulse is introduced at one end of a parallel conductor which is simulated as in an impedance equivalent state, an impedance mismatch generator is mounted to an intermediate region of the parallel conductor. As the impedance mismatch...
10/23/2001
6225812Method and apparatus for measuring the density of a substance having free water compensation
A method and apparatus for measuring the amount of free water contained within a substance includes a waveguide having front and back sides disposed opposite each other. The waveguide defines a chamber for propagating a microwave signal therethrough. The ...
05/01/2001
6182504Emulsion composition monitor
A system monitors the composition of emulsions (e.g., oil/water mixtures) by measuring one or more electrical properties (e.g., dielectric constant) of the emulsion. A computer processor determines a plurality of possible solutions using a predetermined r...
02/06/2001
6025724Device and method for determining the moisture content of packaged material
A method of determining the moisture content of material on a bobbin featuring a hollow core, the method comprising the steps of: (a) transmitting a plurality of microwaves substantially through a portion of the bobbin, such that the microwaves are transm...
02/15/2000
5977780Moisture and density sensor
A microwave resonator for connection to an instrument for measuring the density and/or moisture profile in the longitudinal direction of a sample, which microwave resonator has a through-hole (3) at right angles to its area extent, which through-hole (3) ...
11/02/1999
5949237Microwave cavity resonator for continuous spectroscopic gas analysis
In a microwave resonator for continuous spectroscopic gas analysis with a microwave cavity having dimensions depending on the operating frequency and a setting for a low quality Q of its base mode and microwave reflectors disposed at its opposite ends and...
09/07/1999
5838158Measuring system for measuring the amount of dielectric in a web
An instrument determines one or more physical properties, including dielectric, in a web or other material. A resonant cavity in the instrument resonates at a known band of frequencies. The instrument generates a constant frequency signal within the known...
11/17/1998
5826458Moisture detection meter
A moisture detection meter (10) has a sensing head having a single chamber (11) with an open top. A dielectric resonator member (14) is provided in the chamber. The sensing head also has a field generator (17) to generate an oscillating electric fluid in ...
10/27/1998
5736864Apparatus for ascertaining the complex dielectric constant of tobacco
The complex dielectric constant of successive increments of a stream of tobacco particles is indicative of the mass and/or moisture content of the tested increments. Instead of passing along two high-frequency resonators, as disclosed in German patent No....
04/07/1998
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