Patents by Inventor Ulrich Vollath

Ulrich Vollath 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).

  • Publication number: 20200025938
    Abstract: Methods and apparatus for processing of GNSS signals are presented. These include GNSS processing with predicted precise clocks, GNSS processing with mixed-quality data, GNSS processing with time-sequence maintenance, GNSS processing with reduction of position jumps in low-latency solutions, GNSS processing with position blending to bridge reference station changes, and GNSS processing with delta-phase correction for incorrect starting position.
    Type: Application
    Filed: February 8, 2019
    Publication date: January 23, 2020
    Inventors: Ulrich Vollath, Nicholas Charles Talbot, Markus Glocker, Xiaoming Chen, Rodrigo Leandro
  • Patent number: 10408941
    Abstract: A correction message for regional GNSS data includes at least one network message and at least one cluster message. The at least one network message relates to stations of a network of stations within a region. The at least one cluster message relates to a subset of stations within the region. Network elements are extracted from the network message and cluster elements are extracted from the cluster message. Network elements and cluster elements are used to determine a position of a rover within the region.
    Type: Grant
    Filed: July 7, 2017
    Date of Patent: September 10, 2019
    Assignee: Trimble Inc.
    Inventors: Xiaoming Chen, Ulrich Vollath, Kendall Ferguson
  • Patent number: 10234562
    Abstract: A method and system for delivery of location-dependent time-specific corrections. In one embodiment, a first extended-lifetime correction for a first region is generated. A distribution timetable is used to determine a first time interval for transmitting the first extended-lifetime correction to the first region. The first extended-lifetime correction is then transmitted via a wireless communication network to said first region in accordance with said distribution timetable.
    Type: Grant
    Filed: February 23, 2012
    Date of Patent: March 19, 2019
    Assignee: Trimble Inc.
    Inventors: James M. Janky, Ulrich Vollath, Nicholas C. Talbot
  • Patent number: 9936181
    Abstract: A system for projecting an image, including layout information, on a surface in a building under construction has a projector mounted on a moveable support for supporting a worker at a work position in the building. The projector projects an image on a surface above the moveable support in response to an image signal defining the image to be projected. The image indicates the location of connectors, anchors, and holes to be affixed to, or cut through, the surface. A system determines the two dimensional position of the projector in the building, and a distance measuring system for determines the distance from the projector to said surface. A processor, responsive to a memory having stored building plan images, provides an image signal to the projector adjusted for the two dimensional location of the projector and for the distance from the projector to the surface.
    Type: Grant
    Filed: July 23, 2015
    Date of Patent: April 3, 2018
    Assignee: Trimble Inc.
    Inventors: Kent Wayne Kahle, Jinwei Jiang, Christian Graesser, Andreas Winter, Ulrich Vollath
  • Publication number: 20170307760
    Abstract: A correction message for regional GNSS data includes data from several stations in a network. The correction message has at least one cluster message. The cluster message contains cluster elements relating to a subset of GNSS stations.
    Type: Application
    Filed: July 7, 2017
    Publication date: October 26, 2017
    Inventors: Xiaoming Chen, Ulrich Vollath, Kendall Ferguson
  • Patent number: 9733359
    Abstract: Methods and apparatus for processing of GNSS data derived from multi-frequency code and carrier observations are presented which make available correction data for use by a rover located within the region, the correction data comprising: the ionospheric delay over the region, the tropospheric delay over the region, the phase-leveled geometric correction per satellite, and the at least one code bias per satellite. In some embodiments the correction data includes an ionospheric phase bias per satellite. Methods and apparatus for determining a precise position of a rover located within a region are presented in which a GNSS receiver is operated to obtain multi-frequency code and carrier observations and correction data, to create rover corrections from the correction data, and to determine a precise rover position using the rover observations and the rover corrections.
    Type: Grant
    Filed: February 14, 2011
    Date of Patent: August 15, 2017
    Assignee: Trimble Inc.
    Inventors: Xiaoming Chen, Ulrich Vollath, Kendall Ferguson
  • Patent number: 9709683
    Abstract: Methods and apparatus provide for positioning of a rover antenna from GNSS data derived from multi-frequency signals and correction data derived from a network of reference stations. At each of a plurality of epochs, the GNSS data and correction data are used to estimate values defining a rover antenna position and a set of multi-frequency ambiguities. An ionospheric-free carrier-phase ambiguity per satellite is estimated based on a known rover antenna position. The estimated ionospheric-free carrier-phase ambiguity is combined with an estimated widelane ambiguity and with an estimated ionospheric-free ambiguity and with values defining the known rover antenna position to obtain values defining an aided rover antenna position and aided multi-frequency ambiguities.
    Type: Grant
    Filed: March 11, 2012
    Date of Patent: July 18, 2017
    Assignee: Trimble Inc.
    Inventors: Rodrigo Leandro, Ulrich Vollath, Nicholas Charles Talbot
  • Publication number: 20170176600
    Abstract: Methods and apparatus for processing of GNSS signals are presented. These include GNSS processing with predicted precise clocks, GNSS processing with mixed-quality data, GNSS processing with time-sequence maintenance, GNSS processing with reduction of position jumps in low-latency solutions, GNSS processing with position blending to bridge reference station changes, and GNSS processing with delta-phase correction for incorrect starting position.
    Type: Application
    Filed: December 22, 2016
    Publication date: June 22, 2017
    Inventors: Ulrich Vollath, Nicholas Charles Talbot, Markus Glocker, Xiaoming Chen, Rodrigo Leandro
  • Patent number: 9651677
    Abstract: Methods and apparatus provide for positioning of a rover antenna from GNSS data derived from multi-frequency signals and correction data derived from a network of reference stations. Rover antenna position and multi-frequency ambiguities are estimated at each epoch. An ionospheric filter models variation in ionospheric bias per satellite. A set of ionospheric carrier-phase ambiguities is estimated at least when the multi-frequency ambiguities have attained a predetermined precision. The estimated ionospheric carrier-phase ambiguities are cached. After detecting interruption of signal at the rover antenna and determining reacquisition of signals at the rover antenna, an ionospheric bias per satellite over an interruption interval is predicted. For each satellite, a cached ionospheric carrier-phase ambiguity is combined with a predicted ionospheric bias to obtain a post-interruption ionospheric ambiguity estimate.
    Type: Grant
    Filed: March 11, 2012
    Date of Patent: May 16, 2017
    Assignee: Trimble Inc.
    Inventors: Rodrigo Leandro, Ulrich Vollath, Nicholas Charles Talbot
  • Patent number: 9594168
    Abstract: Methods and apparatus are described for determining position of a rover antenna, comprising: obtaining rover GNSS data derived from code observations and carrier phase observations of GNSS signals of multiple satellites over multiple epochs, obtaining precise satellite data for the satellites, determining a virtual base station location, generating epochs of synthesized base station data using at least the precise satellite data and the virtual base station location, and applying a differential process to at least the rover GNSS data and the synthesized base station data to determine at least rover antenna positions.
    Type: Grant
    Filed: September 19, 2010
    Date of Patent: March 14, 2017
    Assignee: Trimble Inc.
    Inventors: Ulrich Vollath, Xiaoming Chen, Rodrigo Leandro
  • Patent number: 9562975
    Abstract: Methods and apparatus for processing of GNSS signals are presented. These include GNSS processing with predicted precise clocks, GNSS processing with mixed-quality data, GNSS processing with time-sequence maintenance, GNSS processing with reduction of position jumps in low-latency solutions, GNSS processing with position blending to bridge reference station changes, and GNSS processing with delta-phase correction for incorrect starting position.
    Type: Grant
    Filed: March 19, 2012
    Date of Patent: February 7, 2017
    Assignee: Trimble Inc.
    Inventors: Ulrich Vollath, Nicholas Charles Talbot, Markus Glocker, Xiaoming Chen, Rodrigo Leandro
  • Patent number: 9417328
    Abstract: A method for reducing multipath when determining a location of a stationary or near stationary position, includes receiving a signal from an antenna moving continuously with respect to the stationary or near stationary position, the signal including a multipath component, processing the received signal including the multipath component, wherein multipath error in the received signal is reduced during the processing and determining a location of the stationary or near stationary position based on the processed received signal with the multipath error reduced.
    Type: Grant
    Filed: October 2, 2013
    Date of Patent: August 16, 2016
    Assignee: Trimble Navigation Limited
    Inventor: Ulrich Vollath
  • Patent number: 9322918
    Abstract: Methods and apparatus are presented for improved productivity in determining static position of an antenna of a GNSS rover, such as in stop-and-go surveying. Computer-implemented methods and apparatus provide for determining a static position of an antenna of a GNSS rover from observations of GNSS signals collected at the antenna over multiple epochs and from correction data for at least one of the epochs.
    Type: Grant
    Filed: February 20, 2010
    Date of Patent: April 26, 2016
    Assignee: Trimble Navigation Limited
    Inventors: Ulrich Vollath, Nicholas Charles Talbot
  • Patent number: 9201147
    Abstract: Methods and apparatus for processing of GNSS data derived from multi-frequency code and carrier observations are presented which make available correction data for use by a rover located within the region, the correction data comprising: the ionospheric delay over the region, the tropospheric delay over the region, the phase-leveled geometric correction per satellite, and the at least one code bias per satellite. In some embodiments the correction data includes an ionospheric phase bias per satellite. Methods and apparatus for determining a precise position of a rover located within a region are presented in which a GNSS receiver is operated to obtain multi-frequency code and carrier observations and correction data, to create rover corrections from the correction data, and to determine a precise rover position using the rover observations and the rover corrections.
    Type: Grant
    Filed: February 14, 2011
    Date of Patent: December 1, 2015
    Assignee: Trimble Navigation Limited
    Inventors: Xiaoming Chen, Ulrich Vollath, Kendall Ferguson
  • Publication number: 20150334362
    Abstract: A system for projecting an image, including layout information, on a surface in a building under construction has a projector mounted on a moveable support for supporting a worker at a work position in the building. The projector projects an image on a surface above the moveable support in response to an image signal defining the image to be projected. The image indicates the location of connectors, anchors, and holes to be affixed to, or cut through, the surface. A system determines the two dimensional position of the projector in the building, and a distance measuring system for determines the distance from the projector to said surface. A processor, responsive to a memory having stored building plan images, provides an image signal to the projector adjusted for the two dimensional location of the projector and for the distance from the projector to the surface.
    Type: Application
    Filed: July 23, 2015
    Publication date: November 19, 2015
    Inventors: Kent Wayne Kahle, Jinwei Jiang, Christian Graesser, Andreas Winter, Ulrich Vollath
  • Patent number: 9164174
    Abstract: Methods and apparatus for processing of GNSS data derived from multi-frequency code and carrier observations are presented which make available correction data for use by a rover located within the region, the correction data comprising: the ionospheric delay over the region, the tropospher?c delay over the region, the phase-leveled geometric correction per satellite, and the at least one code bias per satellite. In some embodiments the correction data includes an ionospheric phase bias per satellite. Methods and apparatus for determining a precise position of a rover located within a region are presented in which a GNSS receiver is operated to obtain multi-frequency code and carrier observations and correction data, to create rover corrections from the correction data, and to determine a precise rover position using the rover observations and the rover corrections.
    Type: Grant
    Filed: February 14, 2011
    Date of Patent: October 20, 2015
    Assignee: Trimble Navigation Limited
    Inventors: Xiaoming Chen, Ulrich Vollath, Kendall Ferguson
  • Patent number: 9121692
    Abstract: A system for projecting an image, including layout information, on a surface in a building under construction has a projector mounted on a moveable support for supporting a worker at a work position in the building. The projector projects an image on a surface above the moveable support in response to an image signal defining the image to be projected. The image indicates the location of connectors, anchors, and holes to be affixed to, or cut through, the surface. A system determines the two dimensional position of the projector in the building, and a distance measuring system for determines the distance from the projector to said surface. A processor, responsive to a memory having stored building plan images, provides an image signal to the projector adjusted for the two dimensional location of the projector and for the distance from the projector to the surface.
    Type: Grant
    Filed: March 13, 2013
    Date of Patent: September 1, 2015
    Assignee: Trimble Navigation Limited
    Inventors: Kent Wayne Kahle, Jinwei Jiang, Christian Graesser, Andreas Winter, Ulrich Vollath
  • Patent number: 9121932
    Abstract: In a method for refining a position estimate of a low earth orbiting (LEO) satellite a first position estimate of a LEO satellite is generated with a GNSS receiver on-board the LEO satellite. Corrections are received at the LEO satellite. The corrections are processed on-board the LEO satellite such that a corrected LEO satellite position estimate of the LEO satellite is generated for the first position estimate.
    Type: Grant
    Filed: June 27, 2013
    Date of Patent: September 1, 2015
    Assignee: Trimble Navigation Limited
    Inventors: James M. Janky, Nicholas C. Talbot, Ulrich Vollath, Bruce D. Riter
  • Patent number: 9116231
    Abstract: Methods and apparatus are provided for reporting quality of GNSS position fixes. A desired quality mode selection is obtained. Position fixes with respective precision estimates and satellite tracking information are obtained. For each of a plurality of position fixes a current positioning quality is determined, based on the precision estimates and satellite tracking information and quality mode selection. Current positioning quality is reported. The quality selection can be a preference of availability over accuracy, or accuracy over availability, or a balance of availability and accuracy.
    Type: Grant
    Filed: February 23, 2012
    Date of Patent: August 25, 2015
    Assignee: Trimble Navigation Limited
    Inventors: Ulrich Vollath, Sidharth Nair, Jesus Michael Martinez, Greg Price, Glenn Waterland, Mark Gibson
  • Patent number: 8830121
    Abstract: Methods and apparatus are provided for estimating parameters, i.e. ambiguities, derived from GNSS signals. Observations of a GNSS signal from each of a plurality of GNSS satellites are obtained (4120). The observations are fed to a filter having a state vector at least comprising a float ambiguity for each received frequency of the GNSS signals, each float ambiguity constituting a real number estimate associated with an integer number of wavelengths of the GNSS signal between a receiver of the GNSS signal and the GNSS satellite from which it is received, and the filter being for estimating a float value for each float ambiguity of the state vector (4140). A subset of float ambiguities of the state vector is selected (4150). Integer values are assigned to the estimated float values of the float ambiguities of the subset to define a plurality of integer ambiguity candidate sets (4160). A quality measure is determined for each of the candidate sets. A weighted average of the candidate sets is formed (4200).
    Type: Grant
    Filed: August 5, 2009
    Date of Patent: September 9, 2014
    Assignee: Trimble Navigation Limited
    Inventor: Ulrich Vollath