Patents by Inventor Claus-Dieter Ohl
Claus-Dieter Ohl 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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Publication number: 20220177094Abstract: The present invention relates to a method for protecting surfaces of components against cavitation erosion and components provided with such cavitation protection surfaces, wherein in the surface a plurality of microcavities is provided which entrap gas such as air; the gas, air, entrapped inside the microcavities expands in the vicinity of cavitation bubbles, forming a gas cushion layer that directs cavitation jets away from the surface, thereby protecting the surface against cavitation erosion; the cavitation having a reentrant or double reentrant inlet design with typical T-shape and T-shape profileType: ApplicationFiled: March 6, 2020Publication date: June 9, 2022Applicants: Otto-Von-Guericke-Universitat Magdeburg, King Abdullah University of Science and TechnologyInventors: Claus-Dieter Ohl, Silvestre Roberto Gonzalez-Avila, Dang Minh Nguyen, Himanshu Mishra
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Patent number: 11333676Abstract: A method and corresponding device are provided for determining a flow speed in a fluid conduit. The fluid conduit is provided with first, second and third ultrasonic wet transducers, wherein respective connection lines between transducers extend outside of a direction of average flow of the fluid conduit. First and second measuring signals are applied to the first ultrasonic wet transducer and received at the second and the third ultrasonic wet transducer, respectively. The measuring signals comprise a respective reversed signal portion with respect to time of a response signal. Respective first and second response signals are measured and the flow speed is derived from at least one of the first and second response signals.Type: GrantFiled: February 13, 2020Date of Patent: May 17, 2022Assignee: GWF MessSysteme AGInventors: Thomas Werner Hies, Juergen Heinz-Friedrich Skripalle, Trung Dung Luong, Claus-Dieter Ohl
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Patent number: 11156488Abstract: A transducer is provided for emitting and receiving acoustic waves, a method for operating and a method for producing the same. The transducer comprises a casing that forms a cavity. The casing comprises an excitation surface and an emitting surface, which is arranged opposite to the excitation surface. A transducer element is provided at the excitation surface, and an acoustic diffuser is provided at the emitting surface of the casing, wherein a diffusing structure of the acoustic diffuser faces the cavity, and wherein the diffusing structure is provided by an array of columns.Type: GrantFiled: October 7, 2019Date of Patent: October 26, 2021Assignee: GWF MessSysteme AGInventors: Thomas Werner Hies, Claus-Dieter Ohl, Trung Dung Luong
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Patent number: 10928414Abstract: A method for determining a flow speed of a liquid in a fluid conduit is provided. During a signal-generating phase, an impulse signal is applied to a first ultrasonic transducer. A response signal is then received at a second ultrasonic transducer. A measuring signal is later derived from the response signal, wherein the derivation comprises reversing a signal portion with respect to time. During a measurement phase, a liquid moves with respect to the fluid conduit. The measuring signal is then applied to one of the two transducers and a response signal of the measuring signal is measured at the other transducer. A flow speed is derived from the response signal of the measuring signal.Type: GrantFiled: January 14, 2020Date of Patent: February 23, 2021Assignee: GWF MessSysteme AGInventors: Thomas Werner Hies, Trung Dung Luong, Claus-Dieter Ohl, Juergen Heinz-Friedrich Skripalle
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Publication number: 20200182900Abstract: A method and corresponding device are provided for determining a flow speed in a fluid conduit. The fluid conduit is provided with first, second and third ultrasonic transducers, wherein respective connection lines between transducers extend outside of a symmetry axis of the fluid conduit. First and second measuring signals are applied to the first ultrasonic transducer and received at the second and the third ultrasonic transducer, respectively. The measuring signals comprise a respective reversed signal portion with respect to time of a response signal. Respective first and second response signals are measured and the flow speed is derived from at least one of the first and second response signals.Type: ApplicationFiled: February 13, 2020Publication date: June 11, 2020Inventors: Thomas Werner HIES, Juergen Heinz-Friedrich SKRIPALLE, Trung Dung LUONG, Claus-Dieter OHL
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Publication number: 20200150146Abstract: A method for determining a flow speed of a liquid in a fluid conduit is provided. During a signal-generating phase, an impulse signal is applied to a first ultrasonic transducer. A response signal is then received at a second ultrasonic transducer. A measuring signal is later derived from the response signal, wherein the derivation comprises reversing a signal portion with respect to time. During a measurement phase, a liquid moves with respect to the fluid conduit. The measuring signal is then applied to one of the two transducers and a response signal of the measuring signal is measured at the other transducer. A flow speed is derived from the response signal of the measuring signal.Type: ApplicationFiled: January 14, 2020Publication date: May 14, 2020Inventors: Thomas Werner HIES, Trung Dung LUONG, Claus-Dieter OHL, Juergen Heinz-Friedrich SKRIPALLE
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Patent number: 10598684Abstract: A method and corresponding device are provided for determining a flow speed in a fluid conduit. The fluid conduit is provided with first, second and third ultrasonic transducers, wherein respective connection lines between transducers extend outside of a symmetry axis of the fluid conduit. First and second measuring signals are applied to the first ultrasonic transducer and received at the second and the third ultrasonic transducer, respectively. The measuring signals comprise a respective reversed signal portion with respect to time of a response signal. Respective first and second response signals are measured and the flow speed is derived from at least one of the first and second response signals.Type: GrantFiled: July 20, 2018Date of Patent: March 24, 2020Assignee: GWF MESSSYSTEME AGInventors: Thomas Werner Hies, Juergen Heinz-Friedrich Skripalle, Trung Dung Luong, Claus-Dieter Ohl
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Publication number: 20200041320Abstract: A transducer is provided for emitting and receiving acoustic waves, a method for operating and a method for producing the same. The transducer comprises a casing that forms a cavity. The casing comprises an excitation surface and an emitting surface, which is arranged opposite to the excitation surface. A transducer element is provided at the excitation surface, and an acoustic diffuser is provided at the emitting surface of the casing, wherein a diffusing structure of the acoustic diffuser faces the cavity, and wherein the diffusing structure is provided by an array of columns.Type: ApplicationFiled: October 7, 2019Publication date: February 6, 2020Inventors: Thomas Werner HIES, Claus-Dieter OHL, Trung Dung LUONG
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Patent number: 10551405Abstract: A method for determining a flow speed of a liquid in a fluid conduit is provided. During a signal-generating phase, an impulse signal is applied to a first ultrasonic transducer. A response signal is then received at a second ultrasonic transducer. A measuring signal is later derived from the response signal, wherein the derivation comprises reversing a signal portion with respect to time. During a measurement phase, a liquid moves with respect to the fluid conduit. The measuring signal is then applied to one of the two transducers and a response signal of the measuring signal is measured at the other transducer. A flow speed is derived from the response signal of the measuring signal.Type: GrantFiled: December 1, 2016Date of Patent: February 4, 2020Assignee: GWF MESSSYSTEME AGInventors: Thomas Werner Hies, Trung Dung Luong, Claus-Dieter Ohl, Juergen Heinz-Friedrich Skripalle
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Patent number: 10480971Abstract: A transducer is provided for emitting and receiving acoustic waves, a method for operating and a method for producing the same. The transducer comprises a casing that forms a cavity. The casing comprises an excitation surface and an emitting surface, which is arranged opposite to the excitation surface. A transducer element is provided at the excitation surface, and an acoustic diffuser is provided at the emitting surface of the casing, wherein a diffusing structure of the acoustic diffuser faces the cavity.Type: GrantFiled: April 25, 2017Date of Patent: November 19, 2019Assignee: GWF MESSSYSTEME AGInventors: Thomas Werner Hies, Claus-Dieter Ohl, Trung Dung Luong
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Publication number: 20180328956Abstract: A method and corresponding device are provided for determining a flow speed in a fluid conduit. The fluid conduit is provided with first, second and third ultrasonic transducers, wherein respective connection lines between transducers extend outside of a symmetry axis of the fluid conduit. First and second measuring signals are applied to the first ultrasonic transducer and received at the second and the third ultrasonic transducer, respectively. The measuring signals comprise a respective reversed signal portion with respect to time of a response signal. Respective first and second response signals are measured and the flow speed is derived from at least one of the first and second response signals.Type: ApplicationFiled: July 20, 2018Publication date: November 15, 2018Inventors: Thomas Werner HIES, Juergen Heinz-Friedrich SKRIPALLE, Trung Dung LUONG, Claus-Dieter OHL
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Patent number: 10036763Abstract: A method and corresponding device are provided for determining a flow speed in a fluid conduit. The fluid conduit is provided with first, second and third ultrasonic transducers, wherein respective connection lines between transducers extend outside of a symmetry axis of the fluid conduit. First and second measuring signals are applied to the first ultrasonic transducer and received at the second and the third ultrasonic transducer, respectively. The measuring signals comprise a respective reversed signal portion with respect to time of a response signal. Respective first and second response signals are measured and the flow speed is derived from at least one of the first and second response signals.Type: GrantFiled: December 15, 2017Date of Patent: July 31, 2018Assignee: GWF MessSysteme AGInventors: Thomas Werner Hies, Juergen Heinz-Friedrich Skripalle, Trung Dung Luong, Claus-Dieter Ohl
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Publication number: 20180113145Abstract: A method and corresponding device are provided for determining a flow speed in a fluid conduit. The fluid conduit is provided with first, second and third ultrasonic transducers, wherein respective connection lines between transducers extend outside of a symmetry axis of the fluid conduit. First and second measuring signals are applied to the first ultrasonic transducer and received at the second and the third ultrasonic transducer, respectively. The measuring signals comprise a respective reversed signal portion with respect to time of a response signal. Respective first and second response signals are measured and the flow speed is derived from at least one of the first and second response signals.Type: ApplicationFiled: December 15, 2017Publication date: April 26, 2018Inventors: Thomas Werner HIES, Juergen Heinz-Friedrich SKRIPALLE, Trung Dung LUONG, Claus-Dieter OHL
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Patent number: 9903882Abstract: A method for determining a flow speed of a liquid in a fluid conduit is provided. During a signal-generating phase, an impulse signal is applied to a first ultrasonic transducer. A response signal is then received at a second ultrasonic transducer. A measuring signal is later derived from the response signal, wherein the derivation comprises reversing a signal portion with respect to time. During a measurement phase, a liquid moves with respect to the fluid conduit. The measuring signal is then applied to one of the two transducers and a response signal of the measuring signal is measured at the other transducer. A flow speed is derived from the response signal of the measuring signal.Type: GrantFiled: April 25, 2017Date of Patent: February 27, 2018Assignee: GWF MessSysteme AGInventors: Thomas Werner Hies, Trung Dung Luong, Claus-Dieter Ohl, Juergen Heinz-Friedrich Skripalle
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Publication number: 20170307424Abstract: A transducer is provided for emitting and receiving acoustic waves, a method for operating and a method for producing the same. The transducer comprises a casing that forms a cavity. The casing comprises an excitation surface and an emitting surface, which is arranged opposite to the excitation surface. A transducer element is provided at the excitation surface, and an acoustic diffuser is provided at the emitting surface of the casing, wherein a diffusing structure of the acoustic diffuser faces the cavity.Type: ApplicationFiled: April 25, 2017Publication date: October 26, 2017Inventors: Thomas Werner HIES, Claus-Dieter OHL, Trung Dung LUONG
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Publication number: 20170227568Abstract: A method for determining a flow speed of a liquid in a fluid conduit is provided. During a signal-generating phase, an impulse signal is applied to a first ultrasonic transducer. A response signal is then received at a second ultrasonic transducer. A measuring signal is later derived from the response signal, wherein the derivation comprises reversing a signal portion with respect to time. During a measurement phase, a liquid moves with respect to the fluid conduit. The measuring signal is then applied to one of the two transducers and a response signal of the measuring signal is measured at the other transducer. A flow speed is derived from the response signal of the measuring signal.Type: ApplicationFiled: April 25, 2017Publication date: August 10, 2017Inventors: Thomas Werner HIES, Trung Dung LUONG, Claus-Dieter OHL, Juergen Heinz-Friedrich SKRIPALLE
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Publication number: 20170082650Abstract: A method for determining a flow speed of a liquid in a fluid conduit is provided. During a signal-generating phase, an impulse signal is applied to a first ultrasonic transducer. A response signal is then received at a second ultrasonic transducer. A measuring signal is later derived from the response signal, wherein the derivation comprises reversing a signal portion with respect to time. During a measurement phase, a liquid moves with respect to the fluid conduit. The measuring signal is then applied to one of the two transducers and a response signal of the measuring signal is measured at the other transducer. A flow speed is derived from the response signal of the measuring signal.Type: ApplicationFiled: December 1, 2016Publication date: March 23, 2017Inventors: Thomas Werner HIES, Trung Dung LUONG, Claus-Dieter OHL, Juergen Heinz-Friedrich SKRIPALLE
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Patent number: 9389160Abstract: According to various embodiments, a cavitation sensor for detecting bubbles in a liquid is provided. The cavitation sensor may include: a substrate having an insulative surface; and an electrode arrangement provided on or within the insulative surface of the substrate. The electrode arrangement may include a first electrode and a second electrode being isolated from each other by the insulative surface, each of the first and the second electrode including a sensing portion. The spacing between the sensing portion of the first electrode and the sensing portion of the second electrode is adapted to allow charge flow between the first electrode and the second electrode caused by cavitation occurring at the sensing portion.Type: GrantFiled: October 15, 2010Date of Patent: July 12, 2016Assignee: Nanyang Technological UniversityInventors: Claus-Dieter Ohl, Silvestre Roberto Gonzalez-Avila
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Patent number: 9376676Abstract: In various embodiments, a method of breaking down biological material is provided. The method may include providing a sample comprising the biological material in a liquid. The method may further include providing a gas such that the gas forms an interface with the liquid. The method may also include breaking down the biological material by applying acoustic waves in a plurality of sequential bursts to the interface.Type: GrantFiled: September 6, 2013Date of Patent: June 28, 2016Assignees: Agency for Science, Technology and Research, Nanyang Technological UniversityInventors: Tandiono Tandiono, Claus-Dieter Ohl, Siak-Wei Dave Ow, Siew-Wan Ohl, Evert Klaseboer
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Publication number: 20140070033Abstract: In various embodiments, a method of breaking down biological material is provided. The method may include providing a sample comprising the biological material in a liquid. The method may further include providing a gas such that the gas forms an interface with the liquid. The method may also include breaking down the biological material by applying acoustic waves in a plurality of sequential bursts to the interface.Type: ApplicationFiled: September 6, 2013Publication date: March 13, 2014Applicants: Nanyang Technological University, Agency for Science, Technology and ResearchInventors: Tandiono Tandiono, Claus-Dieter Ohl, Siak-Wei Dave Ow, Siew-Wan Ohl, Evert Klaseboer