Patents by Inventor Christian Lundquist
Christian Lundquist 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: 9020752Abstract: The present invention relates to a method for positioning a user inside a building, wherein the user has a user carried device and the device is provided with a direction sensor and a movement sensor. The method includes providing the user carried device with a vector map of the building, wherein the vector map includes vectors and nodes representing possible movement paths for the user in the building; determining a starting point in the vector map, receiving movement information from the movement sensor, receiving direction information from the direction sensor, receiving a magnetic field map at the user carried device, wherein the magnetic field is detectable by the user carried device, and estimating a new position of the user based on the vector map, the movement information, the direction information and the property map.Type: GrantFiled: July 23, 2013Date of Patent: April 28, 2015Assignee: SenionLab ABInventors: Christian Lundquist, Per Skoglar, Fredrik Gustafsson
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Patent number: 8934884Abstract: The present invention relates to a system and method for managing energy consumption in a multi-sensor user-carried device during indoor navigation. In an embodiment of the invention, the device calculates a motion mode, a location mode, or an operational mode, each of which is used to modify sensor behavior, e.g., sampling rate, and/or CPU load, e.g., filtering and modeling complexity. The motion mode describes the manner in which the user is moving (standing still, walking, passive transport for example), the location mode describes a feature of the user's location (near level change or intersection for example), and the operational mode describes the manner in which the user is interacting with the device (holding and monitoring, holding and not monitoring, not holding for example).Type: GrantFiled: September 21, 2012Date of Patent: January 13, 2015Assignee: SenionLab ABInventors: Fredrik Gustafsson, Christian Lundquist, David Tornqvist, Per Skoglar, Jonas Callmer
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Publication number: 20140087707Abstract: The present invention relates to a system and method for managing energy consumption in a multi-sensor user-carried device during indoor navigation. In an embodiment of the invention, the device calculates a motion mode, a location mode, or an operational mode, each of which is used to modify sensor behavior, e.g., sampling rate, and/or CPU load, e.g., filtering and modeling complexity. The motion mode describes the manner in which the user is moving (standing still, walking, passive transport for example), the location mode describes a feature of the user's location (near level change or intersection for example), and the operational mode describes the manner in which the user is interacting with the device (holding and monitoring, holding and not monitoring, not holding for example).Type: ApplicationFiled: September 21, 2012Publication date: March 27, 2014Inventors: Fredrik Gustafsson, Christian Lundquist, David Tornqvist, Per Skoglar, Jonas Callmer
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Publication number: 20130311084Abstract: The present invention relates to a method for positioning a user inside a building, wherein the user has a user carried device and the device is provided with a direction sensor and a movement sensor. The method includes providing the user carried device with a vector map of the building, wherein the vector map includes vectors and nodes representing possible movement paths for the user in the building; determining a starting point in the vector map, receiving movement information from the movement sensor, receiving direction information from the direction sensor, receiving a magnetic field map at the user carried device, wherein the magnetic field is detectable by the user carried device, and estimating a new position of the user based on the vector map, the movement information, the direction information and the property map.Type: ApplicationFiled: July 23, 2013Publication date: November 21, 2013Applicant: SenionLabInventors: CHRISTIAN LUNDQUIST, Per Skoglar, Fredik Gustafsson
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Patent number: 8498811Abstract: The present invention relates to a method for positioning a user inside a building, wherein the user has a user carried device (100) and the user carried device (100) is provided with a direction sensor (110) and a movement sensor (110). The method comprises the steps of providing the user carried device with a vector map (220) of the building, wherein the vector map (220) comprises vectors and nodes representing possible movement paths for the user in the building; determining a starting point in the vector map representing a first position of the user; receiving movement information from the movement sensor (110) regarding movement of the user in the building; receiving direction information from the direction sensor (110) regarding the direction of the movement of the user; and estimating a new position of the user based on the vector map, the movement information and the direction information.Type: GrantFiled: February 9, 2011Date of Patent: July 30, 2013Assignee: Senionlab ABInventors: Christian Lundquist, Per Skoglar, Fredik Gustafsson, David Törnqvist, Jonas Callmer
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Publication number: 20120203453Abstract: The present invention relates to a method for positioning a user inside a building, wherein the user has a user carried device (100) and the user carried device (100) is provided with a direction sensor (110) and a movement sensor (110). The method comprises the steps of providing the user carried device with a vector map (220) of the building, wherein the vector map (220) comprises vectors and nodes representing possible movement paths for the user in the building; determining a starting point in the vector map representing a first position of the user; receiving movement information from the movement sensor (110) regarding movement of the user in the building; receiving direction information from the direction sensor (110) regarding the direction of the movement of the user; and estimating a new position of the user based on the vector map, the movement information and the direction information.Type: ApplicationFiled: February 9, 2011Publication date: August 9, 2012Applicant: SenionLab ABInventors: Christian Lundquist, Per Skoglar, Fredrik Gustafsson, David Törnqvist, Jonas Callmer
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Patent number: 8010253Abstract: A method of stabilizing a vehicle combination including a towing vehicle and a trailer, includes determining at least one vehicle state variable describing the state of the vehicle from a comparison with an assigned nominal value. A correcting variable is produced, which is supplied to an actuator in the vehicle. The correcting variable acts upon a steering actuator in order to adjust the wheel steering angle.Type: GrantFiled: February 5, 2008Date of Patent: August 30, 2011Assignee: ZF Lenksysteme GmbHInventor: Christian Lundquist
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Publication number: 20080196964Abstract: A method of stabilizing a vehicle combination including a towing vehicle and a trailer, includes determining at least one vehicle state variable describing the state of the vehicle from a comparison with an assigned nominal value. A correcting variable is produced, which is supplied to an actuator in the vehicle. The correcting variable acts upon a steering actuator in order to adjust the wheel steering angle.Type: ApplicationFiled: February 5, 2008Publication date: August 21, 2008Applicant: ZF Lenksysteme GmbHInventor: Christian Lundquist