Patents by Inventor Thomas Liljenberg
Thomas Liljenberg 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: 9772311Abstract: In the present invention a controllable acoustic source (14) in connection with the process fluid (10) emits a signal (18) into the fluid (10), consisting of a suspension of particles (12), being volumes of gas, liquid or solid phase. The controllable acoustic signal (18) is allowed to interact, with the particles (12), and the acoustic (pressure) signals (22) resulting from such an interaction is measured preferably via a sensor (24). A spectrum is measured. The spectrum is used to predict properties, content and/or size of the particles (12) and/or used to control a process in which the process fluid (10) participates. The prediction is performed in the view of the control of the acoustic source (14). The used acoustic signal has preferably a frequency below 20 kHz.Type: GrantFiled: October 27, 2014Date of Patent: September 26, 2017Assignee: ACOSENSE ABInventors: Thomas Liljenberg, Stevan Backa, Lennart Thegel, Mats Åbom
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Publication number: 20150059442Abstract: In the present invention a controllable acoustic source (14) in connection with the process fluid (10) emits a signal (18) into the fluid (10), consisting of a suspension of particles (12), being volumes of gas, liquid or solid phase. The controllable acoustic signal (18) is allowed to interact, with the particles (12), and the acoustic (pressure) signals (22) resulting from such an interaction is measured preferably via a sensor (24). A spectrum is measured. The spectrum is used to predict properties, content and/or size of the particles (12) and/or used to control a process in which the process fluid (10) participates. The prediction is performed in the view of the control of the acoustic source (14). The used acoustic signal has preferably a frequency below 20 kHz.Type: ApplicationFiled: October 27, 2014Publication date: March 5, 2015Applicant: ACOSENSE ABInventors: Thomas Liljenberg, Stevan Backa, Lennart Thegel, Mats Åbom
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Patent number: 7964799Abstract: A bushing for an electrical device including an insulating core, where at least a part of the insulating core includes a continuous diffusion barrier with firm adhesion to the insulating core. The bushing is manufactured by coating at least a part of the insulating core with the continuous diffusion barrier.Type: GrantFiled: June 17, 2004Date of Patent: June 21, 2011Assignee: ABB Research Ltd.Inventors: Peter Isberg, Carina Önneby, Erik Johansson, Thomas Liljenberg, Douglas Getson
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Publication number: 20070272432Abstract: A bushing for an electrical device including an insulating core, where at least a part of the insulating core includes a continuous diffusion barrier with firm adhesion to the insulating core. The bushing is manufactured by coating at least a part of the insulating core with the continuous diffusion barrier.Type: ApplicationFiled: June 17, 2004Publication date: November 29, 2007Applicant: ABB Research Ltd.Inventors: Peter Isberg, Carina Onneby, Erik Johansson, Thomas Liljenberg, Douglas Getson
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Patent number: 7082348Abstract: A computer based method for controlling an industrial process that includes at least two unit processes, including the steps of directly controlling the process by a control model including one or more algorithms, and automatic diagnosis of the validity of the process data retrieved from the process for the purpose of preventing irrelevant process data from being used as an input in the control model.Type: GrantFiled: October 4, 2000Date of Patent: July 25, 2006Assignee: ABB ABInventors: Erik Dahlquist, Thomas Liljenberg, Stefan Backa
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Patent number: 6935164Abstract: In the present invention a refiner (108) of a mechanical pulping line is supplied with a controllable acoustic source (14), arranged for emitting acoustic signals into the pulp fluid. The controllable acoustic signal is allowed to interact with the fibres in the pulp, and the acoustic (pressure) signals resulting from such an interaction is measured. At least one spectral component is measured. The measured spectral component is used to predict properties, content and/or size of the fibres. These properties may then be used to control the refiner (108) process. The used acoustic signal has preferably a wavelength that is large compared with a typical site of the particles.Type: GrantFiled: June 27, 2001Date of Patent: August 30, 2005Assignee: ABB ABInventors: Thomas Liljenberg, Stefan Backa, Lennart Thegel
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Patent number: 6874356Abstract: A method and device for monitoring and controlling a pharmaceutical, chemical or food process, in which the biological activity and/or the bio-mass of micro-organisms in the process is monitored, and in which the state of the process is detected by monitoring viscosity and/or aggregate size and/or content of a dispersion of proteins, crystalline particles or fat droplets that are processed, respectively. The micro-organisms and/or bio-molecules produced in the process, and the proteins, crystals particles or fat droplets being processed are monitored by means of acoustic spectroscopy.Type: GrantFiled: November 10, 2003Date of Patent: April 5, 2005Assignee: ABB ABInventors: Anna Kornfeldt, Thomas Liljenberg, Stefan Backa, Claudio Pecorari, Eva Lundberg
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Patent number: 6874355Abstract: A method and device for monitoring and controlling a pharmaceutical, chemical or food process, in which the biological activity and/or the bio-mass of micro-organisms in the process is monitored, and in which the state of the process is detected by monitoring viscosity and/or aggregate size and/or content of a dispersion of proteins, crystalline particles or fat droplets that are processed, respectively. The micro-organisms and/or bio-molecules produced in the process, and the proteins, crystals particles or fat droplets being processed are monitored by means of acoustic spectroscopy.Type: GrantFiled: March 8, 2002Date of Patent: April 5, 2005Assignee: ABB ABInventors: Anna Kornfeldt, Thomas Liljenberg, Stefan Backa, Claudio Pecorari, Eva Lundberg
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Publication number: 20040112121Abstract: A method and device for monitoring and controlling a pharmaceutical, chemical or food process, in which the bio-logical activity and/or the bio-mass of micro-organisms in the process is monitored, and in which the state of the process is detected by monitoring viscosity and/or aggregate size and/or content of a dispersion of proteins, crystalline particles or fat droplets that are processed, respectively. The micro-organisms and/or bio-molecules produced in the process, and the proteins, crystals particles or fat droplets being processed are monitored by means of acoustic spectroscopy.Type: ApplicationFiled: January 28, 2004Publication date: June 17, 2004Inventors: Anna Kornfeldt, Thomas Liljenberg, Stefan Backa, Caludio Pecorari, Eva Lundberg
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Publication number: 20040106170Abstract: A method and device for monitoring and controlling a pharmaceutical, chemical or food process, in which the biological activity and/or the bio-mass of micro-organisms in the process is monitored, and in which the state of the process is detected by monitoring viscosity and/or aggregate size and/or content of a dispersion of proteins, crystalline particles or fat droplets that are processed, respectively. The micro-organisms and/or bio-molecules produced in the process, and the proteins, crystals particles or fat droplets being processed are monitored by means of acoustic spectroscopy.Type: ApplicationFiled: November 10, 2003Publication date: June 3, 2004Inventors: Anna Kornfeldt, Thomas Liljenberg, Stefan Backa, Claudio Pecorari, Eva Lundberg
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Patent number: 6742280Abstract: A method in consolidation and drying of paper. A wet web is contacted with superheated steam, whose temperature is 200-600° C. for the purpose of reducing, by heat transfer from the superheated stream, the water content of the web by evaporation of a substantial part of the water in the same. The wet web is supported and transported by means of a heat-conductive, gas-impermeable belt whose width is equal to or exceeds the width of the web, and jets of the superheated steam are directed towards the side of the web facing away from the belt.Type: GrantFiled: September 13, 2002Date of Patent: June 1, 2004Assignee: Andritz Technology and Asset Management GMBHInventors: Anders Andrén, Stefan Backa, Johan Ekh, Xiaolong Feng, Thomas Liljenberg, Ulf Persson, Xiaojing Zhang
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Publication number: 20040022128Abstract: In the present invention a refiner (108) of a mechanical pulping line is supplied with a controllable acoustic source (14), arranged for emitting acoustic signals into the pulp fluid. The controllable acoustic signal is allowed to interact with the fibres in the pulp, and the acoustic (pressure) signals resulting from such an interaction is measured. At least one spectral component is measured. The measured spectral component is used to predict properties, content and/or size of the fibres. These properties may then be used to control the refiner (108) process. The used acoustic signal has preferably a wavelength that is large compared with a typical site of the particles.Type: ApplicationFiled: June 17, 2003Publication date: February 5, 2004Inventors: Thomas Liljenberg, Stefan Becka, Lennart Thegel
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Publication number: 20040006409Abstract: In the prevent invention a controllable acoustic source (14) in connection with the process fluid (10) emits a signal (18) into the fluid (10), consisting of a suspension of particles (12), being volumes of gas, liquid or solid phase. The controllable acoustic signal (18) is allowed to interact with the particles (12), and the acoustic (pressure) signals (22) resulting from such an interaction is measured preferably via a sensor (24). A spectrum is measured. The spectrum is used to predict properties, content and/or size of the particles (12) and/or used to control a process in which the process fluid (10) participates. The prediction is performed in the view of the control of the acoustic source (14). The used acoustic signal has preferably a frequency below 20 kHz.Type: ApplicationFiled: June 17, 2003Publication date: January 8, 2004Inventors: Thomas Liljenberg, Stefan Backa, Lennart Thegel, Mats Abom
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Patent number: 6597959Abstract: A method and a device for controlling a process (10), having at least two sub-processes (20, 30), by tracking, processing and correcting variables for the product, the production means and/or any process media throughout the process line. The process flow for the first sub-process (20) is divided into slices, each slice representing a specific volume of process flow. At least some of the measured and sampled variable values are related to its specific slice volume.Type: GrantFiled: April 25, 2000Date of Patent: July 22, 2003Assignee: ABB ABInventors: Stefan Backa, Erik Dahlquist, Thomas Liljenberg