Fluent Material Level Signalling Patents (Class 250/357.1)
  • Patent number: 10533889
    Abstract: A method for limit level monitoring with a radiometric limit switch. A detector measures discrete radiation intensities. Statistical distributions of radiation intensities in a state, free of medium, and in a state, covered by medium, are given by two Poisson distributions.
    Type: Grant
    Filed: June 20, 2011
    Date of Patent: January 14, 2020
    Assignee: ENDRESS+HAUSER SE+CO.KG
    Inventors: Simon Weidenbruch, Hartmut Damm, Mingzheng Jiang, Robert Schäuble
  • Patent number: 10446423
    Abstract: Systems, apparatuses and methods for determining a surface profile of a substrate are provided. In one embodiment, a method includes projecting a signal having a vertical component/profile across the surface of the substrate from a plurality of locations along a first side of the substrate, capturing the projected signals at each of a plurality of respective locations across the surface of the substrate and determining a surface profile for the substrate using the captured signals. The process can be automated using a controller having predetermined projection and capture positions along respective sides of the substrate, where a surface profile of the substrate can be automatically determined by the controller using the captured signals.
    Type: Grant
    Filed: June 15, 2017
    Date of Patent: October 15, 2019
    Assignee: APPLIED MATERIALS, INC.
    Inventors: Jun-Liang Su, Karthik Elumalai, Eng Sheng Peh, Sriskantharajah Thirunavukarasu, Dimantha Rajapaksa
  • Patent number: 10436916
    Abstract: A module system for a radiometric measuring device includes a basic module having a sensor arrangement designed to generate a measurement signal on the basis of radiation which strikes the sensor arrangement, a signal evaluation unit electrically coupled to the sensor arrangement and being designed to determine a measurement variable on the basis of the measurement signal, a control device interface, wherein the basic module is coupleable to at least one control device by the control device interface for interchanging data, the basic module being supplied with electrical energy solely via its control device interface in a basic operating state, and an expansion module interface.
    Type: Grant
    Filed: December 27, 2017
    Date of Patent: October 8, 2019
    Assignee: Berthold Technologies GmbH & Co. KG
    Inventors: Ewald Freiburger, Tobias Daibenzeiher
  • Patent number: 10365381
    Abstract: A nuclear level sensing gauge for measuring the level of product in a bin. The gauge includes a source of nuclear radiation positioned adjacent the product in the bin and a housing. A primary scintillator is provided in the housing, adjacent the product in the bin, and opposite the source of nuclear radiation. Nuclear radiation from the source passes through the bin and impinges upon the primary scintillator, generating scintillating light. A light guide conveys the scintillating light from the primary scintillator to light sensing circuitry. The light guide is coupled to the primary scintillator through an air gap. The light guide produces scintillating light flashes in response to absorption of the scintillating light from the primary scintillator. The light sensing circuitry collects the light flashes from the light guide to provide a representation of the level of radiation-absorbing product in the bin.
    Type: Grant
    Filed: January 22, 2016
    Date of Patent: July 30, 2019
    Assignee: Vega Americas, Inc.
    Inventors: Bonaventure Cahill, Thomas Niinemets
  • Patent number: 10197429
    Abstract: A nuclear level sensing gauge for a vessel 10 comprises a vertical source well 12 and one more level sensing detectors 22 mounted to vertically spaced nozzles, where the sources 30 in the source well 12 are distributed sources which emit a radiation pattern illuminating a length of greater than one inch of the respective level sensing nozzle, so that thermal expansion or contraction of the vessel 10 does not significantly alter radiation illuminating each detector 22. In a second embodiment, a vessel 10 includes plural level sensing nozzles and plurality of level sensing wells 12?, each nozzle and level sensing well 12? positioned adjacent to one another such that a source in the well illuminates a detector 22 on the nozzle. Because the respective level sensing wells 12? and level sensing nozzles are closely adjacent to one another, thermal expansion or contraction of the vessel does not significantly alter the illumination of the detector 22.
    Type: Grant
    Filed: September 17, 2012
    Date of Patent: February 5, 2019
    Assignee: Vega Americas, Inc.
    Inventor: Bonaventure Cahill
  • Patent number: 10132940
    Abstract: A radiometric measuring device includes a scintillator, at least one semiconductor photodiode, wherein the at least one semiconductor photodiode is optically coupled to the scintillator, a signal evaluation unit which is electrically coupled to the at least one semiconductor photodiode and is designed to determine a measurement variable on the basis of a measurement signal produced by way of the at least one semiconductor photodiode, and an interface. The radiometric measuring device can be coupled to at least one receiver by way of the interface for the purpose of interchanging data. The radiometric measuring device is designed to be supplied with electrical energy solely via the interface thereof.
    Type: Grant
    Filed: May 20, 2016
    Date of Patent: November 20, 2018
    Assignee: Berthold Technologies GmbH & Co. KG
    Inventors: Steffen Mueller, Ewald Freiburger, Tobias Daibenzeiher
  • Patent number: 10126221
    Abstract: A measuring arrangement for radiometric density-or fill level measurement of a medium in a measuring tube in the field of automation technology. The measuring arrangement is composed of a radioactive radiation source, a detector unit and a clamping apparatus for the radiation source as well as the detector unit. The invention is distinguished by features including that the clamping apparatus has blocking elements, which make the radiation cone of the radioactive radiation source between the measuring tube and the clamping apparatus laterally inaccessible. In such case, the blocking elements are arranged in such a manner that the measuring arrangement is suitable for different diameters of the measuring tube, without the blocking elements losing their protective action.
    Type: Grant
    Filed: December 1, 2015
    Date of Patent: November 13, 2018
    Assignee: ENDRESS+HAUSER SE+CO.KG
    Inventors: Markus Franzke, Axel Schumann, Michael Schmidt, Dirk Glaser
  • Patent number: 9891091
    Abstract: A method and apparatus for determining the location of a phase boundary such as a fill level, in a vessel. The method includes: providing at least one source of radiation capable of emitting radiation through a portion of the interior of the vessel; providing a plurality of radiation detectors, each detector being capable of detecting, within a part of the measurement range, radiation emitted by the source; and providing a data processing unit for calculation of the position of the phase boundary from the amount of radiation detected by the detectors, wherein the data processing unit calculates the position of the phase boundary from the amount of radiation detected by the detectors by: (i) in a first step, determining within which detector stage the phase boundary is located; and then (ii) in a second step, determining the position of the phase boundary within the detector stage determined in (i).
    Type: Grant
    Filed: June 29, 2012
    Date of Patent: February 13, 2018
    Assignee: Johnson Matthey Public Limited Company
    Inventors: Edgar Ramon Sanchez Galicia, Kenneth James, Stephen John Roe
  • Patent number: 9678217
    Abstract: Various embodiments are described herein for a radiation dosimetry apparatus and associated methods for measuring radiation dose. In some embodiments, the apparatus includes multiple scintillating elements for detecting amounts of radiation dose at multiple points within a detection region. Each of the scintillating elements generates light in response to radiation interacting within their volume. A light guide combines the light generated by all of the scintillating elements as well as radiation-induced contaminated optical energy and transmits the combined light to a spectral analysis setup. Multi or hyper-spectral calibration technique allows calculating the dose or dose rate at the positions of the different scintillating elements. The calibration technique isolates the light produced by a given scintillating element from the other scintillating elements as well as any other source of radiation-induced contaminating light.
    Type: Grant
    Filed: May 24, 2012
    Date of Patent: June 13, 2017
    Assignees: Université Laval, Board of Regents, The University of Texas System
    Inventors: Francois Therriault-Proulx, Luc Beaulieu, Louis Archambault, Sam Beddar
  • Patent number: 9284070
    Abstract: A propellant tank for containing a propellant with a liquid phase, preferably for a satellite, includes a tank shell wrapped or wound with scintillating glass fibers, a gamma radiation emitter arranged preferably in the center of the tank, and photodiodes allocated to the glass fibers. Preferably, plural glass fibers are wound in cylindrically symmetrical sections around the tank, and the winding axis of the glass fibers extends through the tank outlet. The glass fibers scintillate and emit pulses of light in response to being impinged upon by gamma radiation. The quantity and location of liquid propellant in the tank is determined by evaluating the light signals emitted by the glass fibers. The tank shell is preferably fabricated of a lightweight metal such as aluminum or titanium, to minimize gamma radiation absorption in the tank shell wall, and thereby minimize the required emitting magnitude of the gamma radiation source.
    Type: Grant
    Filed: May 23, 2013
    Date of Patent: March 15, 2016
    Assignee: Astrium GmbH
    Inventor: Sven Rakers
  • Patent number: 9274247
    Abstract: A system to completely measure multiple densities in varying levels in tanks or vessels. The present invention provides a multiplicity of aligned sources and separate aligned detectors, the combination aligned sources and separate detectors are positioned horizontally relative to each other at varying vertical tank levels, each combination separate source and aligned detector at each measuring level in the tank provide continuous density data at each level. The sources and separate detectors are placed in a vertically aligned array in the separation tank near the weir, with each individual source and separate detector aligned with a given level.
    Type: Grant
    Filed: May 28, 2014
    Date of Patent: March 1, 2016
    Assignee: Ronan Engineering Company
    Inventors: John A. Hewitson, George C. Henry
  • Publication number: 20150144793
    Abstract: Embodiments described herein generally relate to devices, systems and methods for measuring the dose remaining in a drug delivery device that is used for delivering a dose to a patient. In some embodiments, a dose measurement system for measuring the liquid volume in a container includes a plurality of light sources which are disposed and configured to emit electromagnetic radiation toward the container. A plurality of sensors are located in the apparatus that are optically coupleable to the plurality of light sources and are disposed and configured to detect the electromagnetic radiation emitted by at least a portion of the light sources. The apparatus also includes a processing unit configured to receive data representing the portion of the detected electromagnetic radiation from each of the plurality of sensors. The processing unit is further operable to convert the received data into a signature representative of the electromagnetic radiation detected by the plurality of sensors.
    Type: Application
    Filed: November 20, 2014
    Publication date: May 28, 2015
    Inventors: Richard WHALLEY, James WHITE
  • Patent number: 9035259
    Abstract: An instrument adapted for the determination of fluid levels within a vessel by the comparison of the density of the fluid along the length of the instrument, said instrument comprising: (i) at least one generally linear source array comprising a plurality of sources of penetrating radiation, shielding and collimation means and a source supporting structure for supporting the sources and shielding and collimation means in a linear array (ii) at least one generally linear detector array comprising a plurality of radiation detectors, supported on a detector support structure, capable of detecting radiation emitted by the sources, and (iii) means to position the source and a respective detector array such that (a) radiation emitted from each of the sources is capable of following a linear path from the source, through the vessel and material to at least a respective one of the detectors forming a part of the respective detector array, and (b) the linear axis of the source array and the linear axis of its respecti
    Type: Grant
    Filed: September 18, 2009
    Date of Patent: May 19, 2015
    Assignee: Johnson Matthey PLC
    Inventors: Paul David Featonby, Peter Jackson, Benjamin Metcalfe, Thomas John Partington
  • Patent number: 9018608
    Abstract: An optical liquid sensor utilizing a light source, fiber optic cables, a light detector and an irregular transparent surface is provided to detect the presence of liquid in mist and continuous form. The sensor may be integrated into a probe designed for insertion into a pressurized fluid process.
    Type: Grant
    Filed: July 19, 2011
    Date of Patent: April 28, 2015
    Assignee: A+ Manufacturing, LLC
    Inventor: Donald P Mayeaux
  • Publication number: 20140353507
    Abstract: An apparatus for determining the fill level of a medium in a container, comprising: an emitting unit to be monitored in the container and emits radioactive radiation into the container; a first detector unit receives radioactive radiation and forwards measurement data relative to the fill level of the medium to a control/evaluation unit; a second detector unit which receives the radioactive radiation, respectively the secondary radiation, wherein two interfaces for transmission of measurement data to the control/evaluation unit are associated with the second detector unit. Via the first interface measurement data are transmitted. Via the second interface measurement data are transmitted. The control/evaluation unit based on measurement data transmitted by the first detector unit and the second detector unit corrects the fill level of the medium in the container in such a manner that the influence of gas or vapor in the gas, or vapor, space on the measured fill level is at least approximately compensated.
    Type: Application
    Filed: May 21, 2014
    Publication date: December 4, 2014
    Applicant: Endress + Hauser GmbH + Co. KG
    Inventors: Dirk Glaser, Simon Weidenbruch
  • Patent number: 8791406
    Abstract: The invention provides an apparatus and method for measuring a property of a gas, such as the amount of liquid in a stream of the gas. The apparatus comprises a source of beta particles (20), a detector (23) capable of detecting beta particles, means (18) to support said source and said detector spaced apart from each other such that gas may enter the space between the source and detector and that the source is positioned to emit beta particles towards said detector; wherein said detector comprises a scintillation material in optical communication with a photodetector (26), and means (24) to physically isolate said photodetector from said gas.
    Type: Grant
    Filed: September 28, 2010
    Date of Patent: July 29, 2014
    Assignee: Johnson Matthey, PLC
    Inventors: Magne Kjetil Husebo, Tor Magnus Saevareide
  • Patent number: 8785877
    Abstract: Fouling in the fill portion of a cooling tower is monitored by transmitting radiation through a cooling tower, detecting the amount of radiation that has penetrated the cooling tower, and calculating the density of the fill portion of the cooling tower based on the detected radiation. A higher than expected density indicates the presence of fouling on the fill portion of the cooling tower. A rate of fouling may be established by monitoring the density of the fill portion of the cooling tower over time.
    Type: Grant
    Filed: September 10, 2012
    Date of Patent: July 22, 2014
    Assignee: Quantum Technical Services LLC
    Inventors: Charles B. Winfield, Stephen N. Harris, Lance Freeman
  • Patent number: 8754374
    Abstract: A system to completely measure multiple densities in varying levels in tanks or vessels. The present invention provides an individual sensor at each measuring level in the tank, each sensor provided with electronic data to provide continuous density data at leach level. Each sensor is individually placed in the sensor array. If a sensor malfunctions, the individual sensor can be replaced without interrupting the data transmissions or requiring a shutdown of the system to remove the single row array of sensors which are placed together as in the prior art. Each sensor also includes a cooling pipe to cool components with recirculating water.
    Type: Grant
    Filed: August 15, 2012
    Date of Patent: June 17, 2014
    Assignee: Ronan Engineering Company
    Inventor: John A. Hewitson
  • Publication number: 20140091221
    Abstract: Provided is an apparatus for measuring a level of molten metal which has a simple structure and is highly robust against a change in level at a local portion of the surface of molten metal. The apparatus for measuring a level of molten metal according to a first aspect of the present invention is an apparatus which measures a level of molten metal in a mold. The apparatus includes an omnidirectional transmitting antenna; an omnidirectional receiving antenna; and a signal processor. The apparatus measures the level of molten metal in the mold using electromagnetic wave in ultra-high frequency range emitted into the mold by the omnidirectional transmitting antenna.
    Type: Application
    Filed: December 9, 2013
    Publication date: April 3, 2014
    Applicant: Nireco Corporation
    Inventors: Koichi MATSUMOTO, Yasumasa KATO
  • Patent number: 8487262
    Abstract: A radiometric for measuring a physical, measured variable of a fill substance located in a container and for outputting a measurement signal, which corresponds to a measured value of the physical, measured variable. The measuring device has available a single line-pair, via which energy supply of the total measuring device occurs, and via which transmission of the measurement signal occurs.
    Type: Grant
    Filed: November 7, 2008
    Date of Patent: July 16, 2013
    Assignee: Endress + Hauser GmbH + Co. KG
    Inventors: Hartmut Damm, Jochen Politt, Simon Weidenbruch, Mingzehn Jiang
  • Patent number: 8466417
    Abstract: A level or density of a medium in a tank is radiometrically measured by detecting the light flashes generated by a scintillator with an array of photodiodes. Corresponding voltage pulses are summed up and analyzed with respect to their relevance before they are used for determining the level or the density of the medium.
    Type: Grant
    Filed: December 7, 2009
    Date of Patent: June 18, 2013
    Assignee: Vega Grieshaber KG
    Inventors: Winfried Rauer, Josef Fehrenbach
  • Patent number: 8362436
    Abstract: Systems and methods determine the level, density, and/or temperature of a fluid based on the fluorescence of a material within an optical waveguide slab at least partially immersed in the fluid.
    Type: Grant
    Filed: March 14, 2007
    Date of Patent: January 29, 2013
    Assignee: Advanced Precision Inc.
    Inventors: Mark A. Mentzer, Nicholas P. Petrillo, Wayne A. Webb
  • Patent number: 8362440
    Abstract: Fouling in the fill portion of a cooling tower is monitored by transmitting radiation through a cooling tower, detecting the amount of radiation that has penetrated the cooling tower, and calculating the density of the fill portion of the cooling tower based on the detected radiation. A higher than expected density indicates the presence of fouling on the fill portion of the cooling tower. A rate of fouling may be established by monitoring the density of the fill portion of the cooling tower over time.
    Type: Grant
    Filed: March 5, 2012
    Date of Patent: January 29, 2013
    Assignee: Quantum Technical Services LLC
    Inventors: Charles B. Winfield, Stephen N. Harris, Lance Freeman
  • Patent number: 8362432
    Abstract: The inventive optical sensor consists of an LED semiconductor material and elements (herein after the LED components) surrounded by a transparent encapsulant that allows much of the light produced by the LED components to pass while a certain small percentage of the light is internally reflected. The percentage of light internally reflected, depends upon whether at least a front face of the encapsulant is immersed in liquid or in air. The optical liquid sensor also consists of a strategically placed photo sensor that detects the intensity of light that is internally reflected by at least the front face of the encapsulant surrounding the LED. The photo sensor is able to detect the change in intensity of light being internally reflected by at least the front face of the encapsulated LED when the front face, for example, emerges from immersion in a liquid.
    Type: Grant
    Filed: December 31, 2009
    Date of Patent: January 29, 2013
    Assignee: Hydro-Photon, Inc.
    Inventor: Miles Maiden
  • Patent number: 8324572
    Abstract: A radiometric measuring arrangement for measuring fill level of a fill substance in a container includes: arranged one above the other in measurement operation on a first side of the container, two or more radiometric radiators, which, in measurement operation, send radioactive radiation through the container, and which, in measurement operation, are arranged in a measuring position in the interior of the container in a pressure resistant, protective tube protruding laterally into the container; and, arranged on a second side of the container lying opposite to the radiators, at least one detector, which serves to receive radiation intensity penetrating through the container as a function of fill level and to convert such into a fill level dependent, electrical signal. The measuring arrangement permits achievement of a highly linear dependence of total detected radiation intensity on fill level.
    Type: Grant
    Filed: May 29, 2009
    Date of Patent: December 4, 2012
    Assignee: Endress + Hauser Flowtec AG
    Inventors: Alecsandru Nistor, Jochen Politt, Markus Bühler
  • Patent number: 8129692
    Abstract: Fouling in the fill portion of a cooling tower is monitored by transmitting radiation through a cooling tower, detecting the amount of radiation that has penetrated the cooling tower, and calculating the density of the fill portion of the cooling tower based on the detected radiation. A higher than expected density indicates the presence of fouling on the fill portion of the cooling tower. A rate of fouling may be established by monitoring the density of the fill portion of the cooling tower over time.
    Type: Grant
    Filed: October 9, 2008
    Date of Patent: March 6, 2012
    Assignee: Quantum Technical Services, LLC
    Inventors: Charles B. Winfield, Lance Freeman, Stephen N. Harris
  • Patent number: 8084740
    Abstract: A measuring device with a two-wire supply for radiometric filling level measuring or density measuring of a feed material with a processor which is designed to change from an active mode to a power-saving mode.
    Type: Grant
    Filed: March 1, 2010
    Date of Patent: December 27, 2011
    Assignee: VEGA Grieshaber KG
    Inventors: Winfried Rauer, Josef Fehrenbach, Thomas Deck, Holger Sack
  • Publication number: 20110220800
    Abstract: An instrument adapted for the determination of fluid levels within a vessel by the comparison of the density of the fluid along the length of the instrument, said instrument comprising: (i) at least one generally linear source array comprising a plurality of sources of penetrating radiation, shielding and collimation means and a source supporting structure for supporting the sources and shielding and collimation means in a linear array (ii) at least one generally linear detector array comprising a plurality of radiation detectors, supported on a detector support structure, capable of detecting radiation emitted by the sources, and (iii) means to position the source and a respective detector array such that (a) radiation emitted from each of the sources is capable of following a linear path from the source, through the vessel and material to at least a respective one of the detectors forming a part of the respective detector array, and (b) the linear axis of the source array and the linear axis of its respecti
    Type: Application
    Filed: September 18, 2009
    Publication date: September 15, 2011
    Applicant: JOHNSON MATTHEY CATALYSTS
    Inventors: Paul David Featonby, Peter Jackson, Benjamin Metcalfe, Thomas John Partington
  • Publication number: 20110168899
    Abstract: A detector assembly includes an elongate structure and a scintillation detector. The elongate structure defines a detector cavity having an axial dimension extending along a longitudinal axis. The scintillation detector is disposed at least partially within the detector cavity. The detector system can also include a cabinet which can be coupled with an end of the elongate structure, and which can define a cabinet cavity for retaining a junction board, a display screen, a microprocessor unit, and/or other components. The detector assembly can have an explosion-proof rating. A detector system including the detector assembly and a detector unit is also provided, such as for use in applications requiring an explosion-proof rating.
    Type: Application
    Filed: January 13, 2010
    Publication date: July 14, 2011
    Inventors: Andrew Cheshire, Craig A. Caris
  • Publication number: 20100252739
    Abstract: A radiometric for measuring a physical, measured variable of a fill substance located in a container and for outputting a measurement signal, which corresponds to a measured value of the physical, measured variable. The measuring device has available a single line-pair, via which energy supply of the total measuring device occurs, and via which transmission of the measurement signal occurs.
    Type: Application
    Filed: November 7, 2008
    Publication date: October 7, 2010
    Applicant: Endress + Hauser GmbH + Co. KG
    Inventors: Hartmut Damm, Jochen Politt, Simon Weidenbruch, Mingzehn Jiang
  • Publication number: 20100230600
    Abstract: A measuring device with a two-wire supply for radiometric filling level measuring or density measuring of a feed material with a processor which is designed to change from an active mode to a power-saving mode.
    Type: Application
    Filed: March 1, 2010
    Publication date: September 16, 2010
    Inventors: Winfried RAUER, Josef FEHRENBACH, Thomas DECK, Holger SACK
  • Publication number: 20100200756
    Abstract: The inventive optical sensor consists of an LED semiconductor material and elements (herein after the LED components) surrounded by a transparent encapsulant that allows much of the light produced by the LED components to pass while a certain small percentage of the light is internally reflected. The percentage of light internally reflected, depends upon whether at least a front face of the encapsulant is immersed in liquid or in air. The optical liquid sensor also consists of a strategically placed photo sensor that detects the intensity of light that is internally reflected by at least the front face of the encapsulant surrounding the LED. The photo sensor is able to detect the change in intensity of light being internally reflected by at least the front face of the encapsulated LED when the front face, for example, emerges from immersion in a liquid.
    Type: Application
    Filed: December 31, 2009
    Publication date: August 12, 2010
    Applicant: Hydro-Photon, Inc.
    Inventor: Miles Maiden
  • Publication number: 20100140480
    Abstract: A level or density of a medium in a tank is radiometrically measured by detecting the light flashes generated by a scintillator with an array of photodiodes. Corresponding voltage pulses are summed up and analyzed with respect to their relevance before they are used for determining the level or the density of the medium.
    Type: Application
    Filed: December 7, 2009
    Publication date: June 10, 2010
    Inventors: Winfried RAUER, Josef FEHRENBACH
  • Patent number: 7663108
    Abstract: A system for analyzing a bulk material including a tube for transporting a stream of a bulk material, a plurality of illuminators for directing radiation through the stream and arranged about a circumference of the tube, a plurality of detectors arranged substantially opposite the illuminators, and at least one spectrometer for receiving and analyzing data from the plurality of detectors.
    Type: Grant
    Filed: January 23, 2008
    Date of Patent: February 16, 2010
    Assignee: ABB Schweiz AG
    Inventors: Michael Mound, Leopold Blahous
  • Patent number: 7473897
    Abstract: A device for conducting a transmission measurement includes a system for generating a light wave consisting of a first and a second wavelength fraction, in addition to an optical channel guiding the light wave to a sample tube with a sample, wherein the light wave permeates the sample tube with a sample. The device also has a motion unit for producing a relative movement of the light wave along the sample tube. A receiver for receiving and separating the first and second wavelength fragments after the light wave has permeated the sample tube with a sample is also provided. A converter converts the first wavelength fraction into a first digital measuring value describing the degree of transmission in the first wavelength and converts the second wavelength fraction into a second digital measuring value describing the degree of transmission in the second wavelength.
    Type: Grant
    Filed: March 12, 2002
    Date of Patent: January 6, 2009
    Assignee: Tecan Trading AG
    Inventors: Hansjoerg Braendle, Erich Nadler, Matthias Graeter, Daniel Bischof
  • Patent number: 7367226
    Abstract: An interface detection apparatus detects a position of a hidden interface between first and second materials, the first material having a different physical property from the second material. The apparatus encompasses (a) an irradiation mechanism configured to irradiate an electromagnetic wave onto a sample implemented by the first and second materials, (b) a detection mechanism configured to detect the electromagnetic wave that has passed through the sample, and (c) a traveling mechanism configured to change the relative position of the hidden interface with respect to the position of the detection mechanism.
    Type: Grant
    Filed: March 31, 2004
    Date of Patent: May 6, 2008
    Assignee: President of Shizuoka University
    Inventor: Seichi Okamura
  • Patent number: 7247857
    Abstract: This invention relates to an apparatus for detecting hydrogeneous material on a ship's deck comprising a neutron source located below the surface of the ship's deck and emitting fast/energy-rich neutrons, and a detector device that is located below the surface of the ship's deck and detecting thermal neutrons. The invention further relates to a corresponding method of detecting hydrogeneous material on a ship's deck. Hereby an apparatus and a method are provided for detecting occurrences of water on a ship's deck, wherein these occurrences appear in particular when travelling in rough weather conditions. The apparatus being located below the ship's deck, it is consequently not exposed to wear due to rough weather conditions.
    Type: Grant
    Filed: March 12, 2004
    Date of Patent: July 24, 2007
    Assignees: Force Technology, Lyngso Marine A/S
    Inventors: Hald Niels Pedersen, Kjeld Dittmann
  • Patent number: 7132662
    Abstract: A flexible scintillation-type level detector (10), in which the scintillator (18) is made from a flexible tube (12) substantially filled with a liquid scintillating material (16) to provide flexibility in at least two, and preferably three, dimensions. At least one end (32) is aligned for operable connection to a photodetector (14, 20). Outer surfaces of the flexible tube (12) may be covered with an inwardly-facing light reflective material (30) and/or light-excluding material or flexible armored casing(22). The scintillator (18) may include a variable-volume expansion chamber (110, 152, 176) to compensate for thermal expansion and contraction of the liquid scintillator material (16).
    Type: Grant
    Filed: March 26, 2004
    Date of Patent: November 7, 2006
    Assignee: Ronan Engineering Company
    Inventors: Charles E. Baldwin, Craig Carls
  • Patent number: 7078698
    Abstract: A specimen sensing apparatus according to the present invention includes a specimen container which is vertically positioned by a container holder of a columnar rack type and conveyed by a belt conveyor, an infrared CCD camera configured to pick up an infrared image of the specimen container, a visible image converter which converts the infrared image picked up by the infrared CCD camera into a visible image, an image signal processing unit which processes and converts one of the infrared image and the visible image into a signal that is suitable to measure a specimen amount, and a specimen amount measuring unit which measures an amount of specimen contained in the specimen container in response to the signal processed by the image signal processing unit.
    Type: Grant
    Filed: December 23, 2003
    Date of Patent: July 18, 2006
    Inventor: Teruaki Itoh
  • Patent number: 6879425
    Abstract: The invention relates to a device for determining and/or monitoring the density and/or the level (L) of a filling material in a container. A transmitting unit which emits radioactive radiation and a receiving unit which is arranged in such a way that it receives the radioactive radiation or the secondary radiation that is produced by the interaction of the radioactive radiation with the filling material are provided. A regulating/evaluating unit which determines the density and/or the level of the filling material in the container using the measuring data that is supplied by the receiving unit is also provided. The aim of the invention is to provide a device which enables the level or the density of a filling material in a container to be measured reliably. To this end, the receiving unit consists of individual detector units.
    Type: Grant
    Filed: August 23, 2001
    Date of Patent: April 12, 2005
    Assignee: Endress + Hauser GmbH + Co. KG
    Inventors: Hartmut Damm, Joachim Neuhaus, Wolfgang Kämereit
  • Publication number: 20040251416
    Abstract: A flexible scintillation-type level detector (10), in which the scintillator (18) is made from a flexible tube (12) substantially filled with a liquid scintillating material (16) to provide flexibility in at least two, and preferably three, dimensions. At least one end (32) is aligned for operable connection to a photodetector (14, 20). Outer surfaces of the flexible tube (12) may be covered with an inwardly-facing light reflective material (30) and/or light-excluding material or flexible armored casing(22). The scintillator (18) may include a variable-volume expansion chamber (110, 152, 176) to compensate for thermal expansion and contraction of the liquid scintillator material (16).
    Type: Application
    Filed: March 26, 2004
    Publication date: December 16, 2004
    Inventors: Charles E. Baldwin, Craig Caris
  • Publication number: 20040178345
    Abstract: A highly efficient position or liquid level sensing system includes a central fluorescent fiber or rod, a transparent support for mounting the fluorescent fiber preferably in a liquid container or tank, and a float or other movable member extending around the fluorescent fiber for movement relative to the fiber. Light is directed from one end of the fluorescent fiber parallel to and around the fiber; and the side of the float or movable member facing the light reflects the incident light inward toward the fluorescent fiber. A first detector receives radiation from one end of the fiber. Detectors may be provided at both ends of the fiber, and the two outputs may be combined sustractively to provide a substantially linear signal output relative to the position of the float or movable member.
    Type: Application
    Filed: March 10, 2003
    Publication date: September 16, 2004
    Applicant: Kavlico Corporation
    Inventors: Kyong M. Park, Marcos A. Nassar, Michael C. Shum
  • Publication number: 20040135090
    Abstract: A specimen sensing apparatus according to the present invention includes a specimen container which is vertically positioned by a container holder of a columnar rack type and conveyed by a belt conveyor, an infrared CCD camera configured to pick up an infrared image of the specimen container, a visible image converter which converts the infrared image picked up by the infrared CCD camera into a visible image, an image signal processing unit which processes and converts one of the infrared image and the visible image into a signal that is suitable to measure a specimen amount, and a specimen amount measuring unit which measures an amount of specimen contained in the specimen container in response to the signal processed by the image signal processing unit.
    Type: Application
    Filed: December 23, 2003
    Publication date: July 15, 2004
    Inventor: Teruaki Itoh
  • Patent number: 6753532
    Abstract: A method of detecting and suppressing extraneous radiation influences in radiometric measurements utilizes, in addition to the measurement channel that extends at least essentially over the entire usable pulse amplitude spectrum, at least one substitute channel that encompasses only a fractional range of the usable pulse amplitude spectrum. The measurement channel (MK) and substitute channel (EK) are calibrated in terms of the same variables, such as fill level or volume. A comparison between the measurement values, defined by the respective pulse rates of the measurement channel and substitute channel, is brought about in such a way that the value of the linkage varies significantly if extraneous radiation occurs.
    Type: Grant
    Filed: March 6, 2002
    Date of Patent: June 22, 2004
    Assignee: Berthold Technologies GmbH & Co. KG
    Inventor: Manfred Pfleger
  • Publication number: 20040021080
    Abstract: In a method of measuring the fill level of a reactor in continuously operated polymerization processes using measurement of the respective phase interface in the reactor by means of ionizing radiation, at least one measuring unit comprising a radiation source which emits ionizing radiation and a corresponding detector is brought to the phase interface in the reactor and flexibly installed there, with the fill level of the reactor being measured by determining the phase interface by means of the radioactive backscattering measurement.
    Type: Application
    Filed: July 15, 2003
    Publication date: February 5, 2004
    Inventors: Wofgang Bidell, Gerard Lutz, Franz Langhauser, Gunther Scherer, Dirk Meckelnburg, Jurgen Oelze, Hans-Jurgen Gerbig, Jurgen Huhnerben
  • Patent number: 6662649
    Abstract: An material level monitoring and reporting system uses special micropower impulse radar level sensing probes, with one such probe being inserted into each of a plurality of material containment structures, such as storage tanks. The micropower impulse radar probes use flexible waveguides which extend downward to the tank bottom such that micropower radar impulses travel to and from the liquid surface via a wave guide, with the lapse between emission and reception of the impulse indicating a distance from the probe, and thus a liquid level. Each level sensing probe is connected to a communication link which collects level and status information from the level sensing probes and transmits it to a monitoring site. The material level data may be collected from a plurality of intermediate monitoring sites by a central monitoring sites.
    Type: Grant
    Filed: April 12, 2002
    Date of Patent: December 16, 2003
    Assignee: Simmons Sirvey Corporation
    Inventors: John D. Knight, Charles Grempler
  • Patent number: 6640618
    Abstract: A method for detecting change in the foam forming characteristic of an input stream of an aqueous solution which continuously samples the input stream by taking a series of discrete, independent measurements. The method relies on an acoustic sensor to measure foam height within a column. A sample of the input stream is introduced into the column, and aerated to produce foam. The height of the column of foam is then measured using the acoustic sensor, which is correlated with the concentration of foam forming chemical.
    Type: Grant
    Filed: April 10, 2002
    Date of Patent: November 4, 2003
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Richard Eugene Kirts, Brad Lee Hollan
  • Patent number: 6633625
    Abstract: A density profiler for measuring a density profile of a medium including at least two liquids and gaseous phases includes an axially distributed source array providing at least 10 collimated ionising radiation beams; an axially distributed radiation detector array, each detector associated in use with one of the beams and producing an output signal in response to incident radiation; and an analysor for the detector output signals to determine the density of the medium traversed by the beams of radiation.
    Type: Grant
    Filed: April 13, 2001
    Date of Patent: October 14, 2003
    Assignee: Johnson Matthey PLC
    Inventors: Peter Jackson, Robert Simon Knapp
  • Publication number: 20030141456
    Abstract: A method and apparatus for detecting the level of red blood cells, plasma or serum, and organic separation gel in a test tube covered with multiple labels is provided. Visible and infrared light beams are projected onto a test tube. The portions of the light beams that pass through the test tube are detected as a function of position along the vertical axis of the test tube. The levels of the interfaces are then calculated from the detected portions.
    Type: Application
    Filed: January 30, 2002
    Publication date: July 31, 2003
    Inventors: Jack D. Mc Neal, Yagang Liu, Mary S. Adzich
  • Patent number: 6548814
    Abstract: The invention is an apparatus and method for measuring a level, an interface level, and/or a density profile of at least one fluid in a container (2, 3) with at least two nuclear radiation sources (9) vertically arranged at a predetermined distance from each other inside or both inside and outside the tank. A defector unit (11) is used and includes a scintillator rod (12) with photo multiplier tubes (13) at each end. Electronic means provides information on fluid level positions and radiation levels at different places along the scintillator rod (12) by measuring pulse amplitudes from the photo multiplier tube. The radiation is converted to electric pulses having an amplitude proportionate to the light intensity of the radiation at the actual position along the rod (12). A ratiometric calculation of the amplitude determines the position of the corresponding radiation quant.
    Type: Grant
    Filed: June 1, 2000
    Date of Patent: April 15, 2003
    Assignee: BTG Källe Inventing AB
    Inventor: Bjorn Gronli