Patents by Inventor Reinhard Knoechel
Reinhard Knoechel has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 12000909Abstract: A magnetic field measuring device having a cantilevered, mechanically vibratable, rectangular substrate strip, at least one flat side of the substrate strip being coated with a magnetostrictive material system, further having drive means designed for the temporally periodic exertion of a force component directed perpendicular to the flat sides of the substrate strip on at least one part of a flat side of the substrate strip with a predetermined excitation frequency and having a detection device for detecting an electrical signal generated by the vibration of the substrate strip, wherein a. the substrate strip is formed from a material with a modulus of elasticity greater than 5 GPa and b. the excitation frequency is set up as a function of the dimensions of the substrate strip in such a way that the substrate strip oscillates in mechanical resonance and forms a U-mode, and c.Type: GrantFiled: June 9, 2020Date of Patent: June 4, 2024Assignee: Christian-Albrechts-Universitaet zu KielInventors: Eckhardt Quandt, Reinhard Knoechel, Patrick Hayes, Sebastian Toxvaerd
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Patent number: 11892528Abstract: A microwave resonator magnetic field measuring device (1) for measuring alternating magnetic fields, with a base plate (11) having at least one supporting/bearing/clamping point (111), at least one mechanical oscillator (12+13) formed as a microwave resonator in the form of a cantilever (13) having at least one magnetostrictive layer (12), the latter being connected and mounted at at least one point to the base plate (11) in the at least one supporting/bearing/clamping point (111), at least one input coupling means (161) for microwaves and at least one output coupling means (162) for microwaves, wherein the base plate (11) and the mechanical oscillator (12+13) formed as a microwave resonator are at least partly electrically conductive and electrically conductively connected to one another. Also, a magnetic field measuring method having a magnetic field measuring device according to the invention.Type: GrantFiled: March 26, 2019Date of Patent: February 6, 2024Assignee: Christian-Albrechts-Universitaet zu KielInventors: Sebastian Toxvaerd, Reinhard Knoechel, Eckhard Quandt, Lars Thormaehlen
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Publication number: 20220291302Abstract: A magnetic field measuring device having a cantilevered, mechanically vibratable, rectangular substrate strip, at least one flat side of the substrate strip being coated with a magnetostrictive material system, further having drive means designed for the temporally periodic exertion of a force component directed perpendicular to the flat sides of the substrate strip on at least one part of a flat side of the substrate strip with a predetermined excitation frequency and having a detection device for detecting an electrical signal generated by the vibration of the substrate strip, wherein a. the substrate strip is formed from a material with a modulus of elasticity greater than 5 GPa and b. the excitation frequency is set up as a function of the dimensions of the substrate strip in such a way that the substrate strip oscillates in mechanical resonance and forms a U-mode, and c.Type: ApplicationFiled: June 9, 2020Publication date: September 15, 2022Inventors: Eckhardt Quandt, Reinhard Knoechel, Patrick Hayes, Sebastian Toxvaerd
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Patent number: 11137457Abstract: A magnetic field sensor element with a piezo electric substrate having predetermined shear wave velocity VS, two pairs of interdigital electrodes, arranged on the substrate on the ends of a delay section, having a period length p of at least 10 micrometers, a non-magnetic, electrically non-conductive guide layer arranged on the substrate along the delay section, and a magnetostrictive functional layer arranged on the guide layer, wherein the shear wave velocity in the guide layer is smaller than VS, wherein a) the substrate is oriented to generate and propagate mechanical shear waves upon applying a temporally periodic, electrical voltage to at least one interdigital electrode pair in the range of frequency VS/p and, wherein b) the thickness of the guide layer equals at least 10% and at most 30% of the period length p of the interdigital electrodes.Type: GrantFiled: October 6, 2017Date of Patent: October 5, 2021Assignee: Christian-lbrechts-Universitaet zu KielInventors: Eckhard Quandt, Anne Kittmann, Sebastian Zabel, Erdem Yarar, Franz Faupel, Reinhard Knoechel, Michael Hoeft, Phillip Durdaut
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Publication number: 20210231757Abstract: A microwave resonator magnetic field measuring device (1) for measuring alternating magnetic fields, with a base plate (11) having at least one supporting/bearing/clamping point (111), at least one mechanical oscillator (12+13) formed as a microwave resonator in the form of a cantilever (13) having at least one magnetostrictive layer (12), the latter being connected and mounted at at least one point to the base plate (11) in the at least one supporting/bearing/clamping point (111), at least one input coupling means (161) for microwaves and at least one output coupling means (162) for microwaves, wherein the base plate (11) and the mechanical oscillator (12+13) formed as a microwave resonator are at least partly electrically conductive and electrically conductively connected to one another. Also, a magnetic field measuring method having a magnetic field measuring device according to the invention.Type: ApplicationFiled: March 26, 2019Publication date: July 29, 2021Inventors: Sebastian Toxvaerd, Reinhard Knoechel, Eckhard Quandt, Lars Thormaehlen
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Patent number: 10613159Abstract: A magnetic field measuring method using a magnetoelectric composite element as an oscillator, in which a time-dependent measurement magnetic field acts on the magnetostrictive phase of the composite element, and an electrical measurement voltage is tapped off across the piezoelectric phase of the composite element and is used to infer the measurement magnetic field. At least one dielectric phase is connected to the magnetostrictive phase of the composite element by a material bond. When an electrical voltage is applied, the dielectric phase exhibits a change in length, the magnitude of which depends in a non-linear manner on the magnitude of the voltage, and a temporally periodic electrical modulation voltage is applied to the dielectric phase.Type: GrantFiled: May 31, 2016Date of Patent: April 7, 2020Assignee: Christian-Albrechts-Universitaet zu KielInventors: Patrick Hayes, Andre Piorra, Reinhard Knoechel, Eckhard Quandt
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Publication number: 20190317161Abstract: A magnetic field sensor element with a piezo electric substrate having predetermined shear wave velocity VS, two pairs of interdigital electrodes, arranged on the substrate on the ends of a delay section, having a period length p of at least 10 micrometers, a non-magnetic, electrically non-conductive guide layer arranged on the substrate along the delay section, and a magnetostrictive functional layer arranged on the guide layer, wherein the shear wave velocity in the guide layer is smaller than VS, wherein a) the substrate is oriented to generate and propagate mechanical shear waves upon applying a temporally periodic, electrical voltage to at least one interdigital electrode pair in the range of frequency VS/p and, wherein b) the thickness of the guide layer equals at least 10% and at at most 30% of the period length p of the interdigital electrodes.Type: ApplicationFiled: October 6, 2017Publication date: October 17, 2019Inventors: Eckhard Quandt, Anne Kittmann, Sebastian Zabel, Erdem Yarar, Franz Faupel, Reinhard Knoechel, Michael Hoeft, Phillip Durdaut
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Publication number: 20180299514Abstract: A magnetic field measuring method using a magnetoelectric composite element as an oscillator, in which a time-dependent measurement magnetic field acts on the magnetostrictive phase of the composite element, and an electrical measurement voltage is tapped off across the piezoelectric phase of the composite element and is used to infer the measurement magnetic field. At least one dielectric phase is connected to the magnetostrictive phase of the composite element by a material bond. When an electrical voltage is applied, the dielectric phase exhibits a change in length, the magnitude of which depends in a non-linear manner on the magnitude of the voltage, and a temporally periodic electrical modulation voltage is applied to the dielectric phase.Type: ApplicationFiled: May 31, 2016Publication date: October 18, 2018Inventors: Patrick Hayes, Andre Piorra, Reinhard Knoechel, Eckhard Quandt
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Patent number: 9810749Abstract: A magnetic field measuring device with a holding body and a plurality of magnetoelectric cantilever sensors, each of which is designed to output one electrical voltage signal while it bends in the presence of a magnetic field, the cantilever sensors being non-positively connected or bonded to the holding body.Type: GrantFiled: May 27, 2014Date of Patent: November 7, 2017Assignee: Christian-Albrechts-Universitaet zu KielInventors: Robert Jahns, Holger Runkowske, Reinhard Knoechel
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Patent number: 9383417Abstract: A method for measuring a time-variant magnetic field using a magnetoelectric sensor having mechanical resonant frequency fR, wherein the magnetic field has at least one component having harmonic time dependence with the measuring signal amplitude to be determined Hmess0 and the measuring signal frequency to be determined fmess in a known frequency interval fmin<fmess<fmax. The method includes: a. superimposing the magnetic field with a modulation magnetic field having harmonic time dependence with the known modulation amplitude Hmess0 and a selectable modulation frequency on the sensor, b. varying (wobbling) the modulation frequency over a complementary frequency interval determined by the known interval limits fmin, fmax and the resonant frequency of the sensor, c. measuring the sensor signal for each selected modulation frequency, d. searching for the at least one modulation frequency fmod, which results in a sensor signal in the mechanical resonance of the sensor, e.Type: GrantFiled: January 13, 2012Date of Patent: July 5, 2016Assignee: Christian-Albrechts-Universitaet zu KielInventors: Robert Jahns, Reinhard Knoechel, Eckhard Quandt
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Publication number: 20160116552Abstract: A magnetic field measuring device with a holding body and a plurality of magnetoelectric cantilever sensors, each of which is designed to output one electrical voltage signal while it bends in the presence of a magnetic field, the cantilever sensors being non-positively connected or bonded to the holding body.Type: ApplicationFiled: May 27, 2014Publication date: April 28, 2016Inventors: Robert Jahns, Holger Runkowske, Reinhard Knoechel
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Patent number: 8786288Abstract: Disclosed is a method of estimating a property of an earth formation penetrated by a borehole. The method includes conveying a carrier through the borehole and performing a plurality of electrical measurements on the formation using a sensor disposed at the carrier and having a plurality of electrodes disposed in a concentric arrangement wherein a standoff distance between the sensor and a wall of the borehole has an influence on each electrical measurement in the plurality of electrical measurements. The method further includes determining an impedance for each electrical measurement in the plurality of electrical measurements and inputting the determined impedances into an artificial neural network implemented by a processor. The artificial neural network outputs the property wherein the outputted property compensates for the influence of sensor standoff distance on each electrical measurement in the plurality of electrical measurements.Type: GrantFiled: August 18, 2011Date of Patent: July 22, 2014Assignee: Baker Hughes IncorporatedInventors: Matthias Gorek, Gregory B. Itskovich, Frank Daschner, Reinhard Knöchel, Assol Kavtorina
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Publication number: 20130289913Abstract: A method for measuring a time-variant magnetic field using a magnetoelectric sensor having mechanical resonant frequency fR, wherein the magnetic field has at least one component having harmonic time dependence with the measuring signal amplitude to be determined Hmess0 and the measuring signal frequency to be determined fmess in a known frequency interval fmin<fmess<fmax. The method includes: a. superimposing the magnetic field with a modulation magnetic field having harmonic time dependence with the known modulation amplitude Hmess0 and a selectable modulation frequency on the sensor, b. varying (wobbling) the modulation frequency over a complementary frequency interval determined by the known interval limits fmin, fmax and the resonant frequency of the sensor, c. measuring the sensor signal for each selected modulation frequency, d. searching for the at least one modulation frequency fmod, which results in a sensor signal in the mechanical resonance of the sensor, e.Type: ApplicationFiled: January 13, 2012Publication date: October 31, 2013Applicant: Christian-Albrechts-Universitaet zu KielInventors: Robert Jahns, Reinhard Knoechel, Eckhard Quandt
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Publication number: 20120209527Abstract: Disclosed is a method of estimating a property of an earth formation penetrated by a borehole. The method includes conveying a carrier through the borehole and performing a plurality of electrical measurements on the formation using a sensor disposed at the carrier and having a plurality of electrodes disposed in a concentric arrangement wherein a standoff distance between the sensor and a wall of the borehole has an influence on each electrical measurement in the plurality of electrical measurements. The method further includes determining an impedance for each electrical measurement in the plurality of electrical measurements and inputting the determined impedances into an artificial neural network implemented by a processor. The artificial neural network outputs the property wherein the outputted property compensates for the influence of sensor standoff distance on each electrical measurement in the plurality of electrical measurements.Type: ApplicationFiled: August 18, 2011Publication date: August 16, 2012Applicant: BAKER HUGHES INCORPORATEDInventors: Matthias Gorek, Gregory B. Itskovich, Alexandre N. Bespalov, Frank Daschner, Reinhard Knöchel, Assol Kavtorina
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Patent number: 7132836Abstract: 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 for environmental influences and disturbance variables affecting the measuring signal of the first microwave resonator. According to the invention, the compensation device comprises a second microwave resonator, which is shielded towards the product area with respect to microwave radiation.Type: GrantFiled: March 29, 2004Date of Patent: November 7, 2006Assignee: Trützschler GmbH & Co. KGInventors: Steffen Peters, Reinhard Knöchel, Wolfgang Taute, Claas Döscher
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Patent number: 7068048Abstract: The application relates to a microwave sensor for measuring a dielectric property, especially the density and/or moisture content of a product, having a microwave resonator, wherein a product introduced into the resonator interacts with a resonant microwave field generated in the resonator in order to determine suitable measured quantities, and is characterized in that at least two half-waves of the electric field are formed in the resonator in one direction, the product feed being effected in at least one region of high field intensity of one of the half-waves of the electric field.Type: GrantFiled: February 14, 2005Date of Patent: June 27, 2006Assignee: Trützschler GmbH & Co. KGInventors: Steffen Peters, Reinhard Knöchel, Wolfgang Taute, Claas Döscher
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Patent number: 6917205Abstract: 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 through opening for the material to pass through and a testing region located inside the resonator housing to which the material can be moved at least in part. The device has at least one element that increases energy density of electromagnetic waves for increasing the energy density in at least a portion of the testing region.Type: GrantFiled: December 15, 2003Date of Patent: July 12, 2005Assignee: Hauni Maschinenbau AGInventors: Henning Möller, Jörg Tobias, Wolfgang Taute, Reinhard Knöchel
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Patent number: 6747460Abstract: 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 through opening for the material to pass through and a testing region located inside the resonator housing to which the material can be moved at least in part. The device has at least one element that increases energy density of electromagnetic waves for increasing the energy density in at least a portion of the testing region.Type: GrantFiled: March 14, 2002Date of Patent: June 8, 2004Assignee: Hauni Maschinenbau AGInventors: Henning Möller, Jörg Tobias, Wolfgang Taute, Reinhard Knöchel
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Patent number: 6414574Abstract: A potential-free connection of a first line section of a microwave transmission line with a second line section of the microwave transmission line is described and illustrated. To obtain a broadband transfer range for the microwave signal with high breakdown voltage at the same time, it is provided for that the first line section of the microwave transmission line has a first slotted line, the second line section of the microwave transmission line has a second slotted line and the first slotted line and the second slotted line are arranged on two opposite sides of a dielectric substrate in such a way that the first slotted line and the second slotted line have a strong electromagnetic coupling but have no conductive connection to each other.Type: GrantFiled: November 7, 2000Date of Patent: July 2, 2002Assignee: Krohne Messtechnik GmbH & Co. KGInventors: Reinhard Knöchel, Matthias Weiss
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Patent number: 6411103Abstract: A stray-field sensor for measuring dielectric properties of substances includes generating elements for generating an electrical field and shielding elements for shielding the generated electrical field. The shielding elements have at least two openings for coupling the electrical field out into the outside space so that the electrical field is at least partially located outside of the shielding elements.Type: GrantFiled: June 5, 2000Date of Patent: June 25, 2002Assignee: Hauni Maschinenbau AGInventors: Jörg Tobias, Reinhard Knöchel, Matthias Busse