Patents by Inventor Set Svanholm

Set Svanholm 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).

  • Patent number: 10816646
    Abstract: A distance measurement instrument and a method of operating a distance measurement instrument are disclosed. According to some embodiments, a transmit light signal is transmitted by a transmitter unit along a transmit path at an emission time and a return light signal is received by a receiver unit at a receive time along a receive path. The return light signal is converted to a return electrical signal. At least one of the transmit path and the receive path is deflected by a deflection module at a deflection angle relative to an optical axis of the instrument. A time-dependent attenuation function is selected based on information relative to the deflection angle and attenuation is applied by an attenuator to at least one of the return light signal and the return electrical signal according to the selected time-dependent function. A measured distance may be determined by a processor unit based on at least the emission time and the receive time.
    Type: Grant
    Filed: June 15, 2017
    Date of Patent: October 27, 2020
    Assignee: Trimble AB
    Inventors: Johan Lekås, Set Svanholm, Alex Slawomir Kosakowski
  • Publication number: 20200217661
    Abstract: Methods, controllers and computer program products for efficient utilization of a surveying instrument are provided. The surveying instrument may perform different types of data collection tasks, at least one of which includes measuring a direction and/or a distance to a target. The surveying instrument is controlled to perform one or more data collection tasks in accordance with a queue of one or more data collection tasks. The queue includes a data collection task of at least one of the different types of data collection tasks. During an ongoing data collection task or during an ongoing sequence of data collection tasks, an instruction is received. The instruction indicates an additional data collection task to be performed by the surveying instrument in addition to the one or more tasks already in the queue. The surveying instrument is controlled to perform data collection tasks in an order determined based on the queue and the received instruction.
    Type: Application
    Filed: March 16, 2020
    Publication date: July 9, 2020
    Inventors: Christer Hörlin, Set Svanholm
  • Patent number: 10281578
    Abstract: A transmit light signal is emitted toward a target at an emission time. An optical subsystem of a receiving system receives a return light signal which is converted to a return electrical signal. At least one attenuator applies an attenuation to at least one of the return light signal and the return electrical signal. The attenuation varies, as time passes, after emission of the transmit light signal, according to a time-dependent attenuation function such that the attenuation is maximum at a critical time elapsed since an emission time of the transmit light signal. The critical time is dependent on at least one geometrical parameter of the optical subsystem. A receive time is determined from the return electrical signal. The emission time and the receive time are used to calculate a measured distance.
    Type: Grant
    Filed: September 21, 2016
    Date of Patent: May 7, 2019
    Assignee: Trimble AB
    Inventors: Johan Lekås, Set Svanholm, Alex Slawomir Kosakowski
  • Publication number: 20170285149
    Abstract: A distance measurement instrument and a method of operating a distance measurement instrument are disclosed. According to some embodiments, a transmit light signal is transmitted by a transmitter unit along a transmit path at an emission time and a return light signal is received by a receiver unit at a receive time along a receive path. The return light signal is converted to a return electrical signal. At least one of the transmit path and the receive path is deflected by a deflection module at a deflection angle relative to an optical axis of the instrument. A time-dependent attenuation function is selected based on information relative to the deflection angle and attenuation is applied by an attenuator to at least one of the return light signal and the return electrical signal according to the selected time-dependent function. A measured distance may be determined by a processor unit based on at least the emission time and the receive time.
    Type: Application
    Filed: June 15, 2017
    Publication date: October 5, 2017
    Inventors: Johan Lekås, Set Svanholm, Alex Slawomir Kosakowski
  • Publication number: 20170010357
    Abstract: A transmit light signal is emitted toward a target at an emission time. An optical subsystem of a receiving system receives a return light signal which is converted to a return electrical signal. At least one attenuator applies an attenuation to at least one of the return light signal and the return electrical signal. The attenuation varies, as time passes, after emission of the transmit light signal, according to a time-dependent attenuation function such that the attenuation is maximum at a critical time elapsed since an emission time of the transmit light signal. The critical time is dependent on at least one geometrical parameter of the optical subsystem. A receive time is determined from the return electrical signal. The emission time and the receive time are used to calculate a measured distance.
    Type: Application
    Filed: September 21, 2016
    Publication date: January 12, 2017
    Inventors: Johan Lekås, Set Svanholm, Alex Slawomir Kosakowski
  • Patent number: 9322652
    Abstract: A method for determining, in relation to a surveying instrument, target coordinates of a point of interest, or target, identified in two images captured by a camera in the surveying instrument. The method comprises determining coordinates of the surveying instrument, capturing a first image using the camera in the first camera position; identifying, in the first image, an object point associated with the target; measuring first image coordinates of the object point in the first image; rotating the surveying instrument around the horizontal axis and the vertical axis in order to position the camera in a second camera position; capturing a second image using the camera in the second camera position; identifying, in the second image, the object point identified in the first image; measuring second image coordinates of the object point in the second image; and determining the coordinates of the target in relation to the surveying instrument.
    Type: Grant
    Filed: October 24, 2014
    Date of Patent: April 26, 2016
    Assignee: Trimble AB
    Inventors: Nick Mein, Set Svanholm, Christian Graesser, Michael Vogel
  • Patent number: 9189858
    Abstract: A method is disclosed for determining coordinates of a target in relation to a surveying instrument wherein a first image is captured using a first camera in a first camera position and orientation, a target is selected by identifying at least one object point in the first image, and first image coordinates of the object point in the first image are measured. In at least one embodiment, a second image is captured using a second camera in a second camera position and orientation, the object point identified in the first image is identified in the second image, and second image coordinates of the object point in the second image are measured. Target coordinates of the target in relation to the rotation center of the surveying instrument are then determined based on the first camera position and orientation, the first image coordinates, the second camera position and orientation, the second image coordinates, and first and second camera calibration data.
    Type: Grant
    Filed: February 29, 2008
    Date of Patent: November 17, 2015
    Assignee: TRIMBLE AB
    Inventors: Set Svanholm, Michael Vogel, Christian Grässer
  • Publication number: 20150062309
    Abstract: A method for determining, in relation to a surveying instrument, target coordinates of a point of interest, or target, identified in two images captured by a camera in the surveying instrument. The method comprises determining coordinates of the surveying instrument, capturing a first image using the camera in the first camera position; identifying, in the first image, an object point associated with the target; measuring first image coordinates of the object point in the first image; rotating the surveying instrument around the horizontal axis and the vertical axis in order to position the camera in a second camera position; capturing a second image using the camera in the second camera position; identifying, in the second image, the object point identified in the first image; measuring second image coordinates of the object point in the second image; and determining the coordinates of the target in relation to the surveying instrument.
    Type: Application
    Filed: October 24, 2014
    Publication date: March 5, 2015
    Inventors: Nick Mein, Set Svanholm, Christian Graesser, Michael Vogel
  • Patent number: 8897482
    Abstract: A method for determining, in relation to a surveying instrument, target coordinates of a point of interest, or target, identified in two images captured by a camera in the surveying instrument. The method comprises determining coordinates of the surveying instrument, capturing a first image using the camera in the first camera position; identifying, in the first image, an object point associated with the target; measuring first image coordinates of the object point in the first image; rotating the surveying instrument around the horizontal axis and the vertical axis in order to position the camera in a second camera position; capturing a second image using the camera in the second camera position; identifying, in the second image, the object point identified in the first image; measuring second image coordinates of the object point in the second image; and determining the coordinates of the target in relation to the surveying instrument.
    Type: Grant
    Filed: January 30, 2009
    Date of Patent: November 25, 2014
    Assignee: Trimble AB
    Inventors: Nick Mein, Set Svanholm, Christian Graesser, Michael Vogel
  • Patent number: 8629905
    Abstract: A method is disclosed for localizing a surveying instrument having a housing including at least one camera in relation to a mark located at a ground level. The method comprises the steps of capturing a first image of the ground below the housing in a first camera position and orientation, wherein the first camera position is eccentric to a vertical rotational axis of the surveying instrument, identifying an object point corresponding to the mark in the first image, measuring first image coordinates of the object point in the first image. The method further comprises the steps of capturing a second image of the ground below the housing in a second camera position and orientation, identifying in the second image, an object point corresponding to the mark, and measuring second image coordinates of the object point in the second image.
    Type: Grant
    Filed: June 26, 2008
    Date of Patent: January 14, 2014
    Assignee: Trimble AB
    Inventor: Set Svanholm
  • Patent number: 8625086
    Abstract: A method is disclosed for determining coordinates of a target in relation to a surveying instrument wherein a first image is captured using a camera in a first camera position and orientation, a target is selected by identifying an object point in the first image, and first image coordinates of the object point in the first image are measured. The surveying instrument is then rotated around the rotation center so that the camera is moved from the first camera position and orientation to a second camera position and orientation, while retaining the rotation center of the surveying instrument in a fixed position. A second image is captured using the camera in the second camera position and orientation, the object point identified in the first image is identified in the second image, and second image coordinates of the object point in the second image are measured.
    Type: Grant
    Filed: February 12, 2008
    Date of Patent: January 7, 2014
    Assignee: Trimble AB
    Inventors: Michael Vogel, Set Svanholm, Christian Grässer
  • Patent number: 8396681
    Abstract: A distance measuring measurement instrument and a method for such a station for scanning a surface or volume of an object are disclosed. The measurement instrument includes a position calculating circuit adapted to calculate position data including at least horizontal and vertical angle and distance between the measurement instrument and the object. A plurality of points in each of a number of subsets of a scanning area of the object during a measurement session and, at detection of a new point in the new subset, information related to at least one point having a corresponding location in at least one preceding subset is used, wherein the preceding subset being adjacent to the new subset.
    Type: Grant
    Filed: January 25, 2007
    Date of Patent: March 12, 2013
    Assignee: Trimble AB
    Inventors: Set Svanholm, Grégory Lepere, Guillaume David, Fredrik Gylesjö, Sven Johansson, Björn Magnusson
  • Patent number: 8390794
    Abstract: An optical instrument and a method for obtaining distance and image information of an object is disclosed to improve the speed and accuracy of data acquisition. The instrument comprises a camera, positioning unit, distance measuring unit, lens arrangement and control unit. The camera acquires images of an object and the control unit defines an area to be scanned and measurement pixels of an object in the image, wherein the measurement pixels are converted into an approximation of coordinates of positions to be measured assuming a default distance to the positions, and the optical axis of the lens arrangement is adjusted sequentially onto the positions to be measured. After measuring the distances to the positions, the coordinates are recalculated increasing the accuracy of the coordinates.
    Type: Grant
    Filed: November 21, 2011
    Date of Patent: March 5, 2013
    Assignee: Trimble Jena GmbH
    Inventors: Torsten Kludas, Michael Vogel, Christian Grasser, Set Svanholm
  • Patent number: 8368875
    Abstract: An optical instrument and a method for obtaining distance and image information of an object is disclosed to improve the speed and accuracy of data acquisition. The instrument comprises a camera, positioning unit, distance measuring unit, lens arrangement and control unit. The camera acquires images of an object and the control unit defines an area to be scanned as well as an object feature of the object, wherein measurement pixels corresponding to positions on the object may be defined in the area with an increased density of measurement pixels at the object feature. Subsequently, the distances to the object at the selected positions of interest are measured.
    Type: Grant
    Filed: July 22, 2009
    Date of Patent: February 5, 2013
    Assignee: Trimble Jena GmbH
    Inventors: Torsten Kludas, Michael Vogel, Christian Grasser, Set Svanholm
  • Patent number: 8345928
    Abstract: A method is disclosed for localizing, in relation to a mark located at a ground level, a surveying instrument having a housing including at least one camera. In at least one embodiment, the method includes aligning the vertical rotational axis of the surveying instrument with the mark using a pointing device; capturing an image of the ground below the housing with the camera arranged in a known camera position and orientation, wherein the camera position is eccentric to the rotation center of the surveying instrument; identifying an object point corresponding to the mark in the captured image; measuring image coordinates of the object point in the captured image; and determining the height of the rotation center of said instrument above the ground based on the image coordinates and camera calibration data. Furthermore, a surveying instrument for performing at least one embodiment of the method is disclosed.
    Type: Grant
    Filed: June 26, 2008
    Date of Patent: January 1, 2013
    Assignee: Trimble AB
    Inventor: Set Svanholm
  • Publication number: 20120062868
    Abstract: An optical instrument and a method for obtaining distance and image information of an object is disclosed to improve the speed and accuracy of data acquisition. The instrument comprises a camera, positioning unit, distance measuring unit, lens arrangement and control unit. The camera acquires images of an object and the control unit defines an area to be scanned and measurement pixels of an object in the image, wherein the measurement pixels are converted into an approximation of coordinates of positions to be measured assuming a default distance to the positions, and the optical axis of the lens arrangement is adjusted sequentially onto the positions to be measured. After measuring the distances to the positions, the coordinates are recalculated increasing the accuracy of the coordinates.
    Type: Application
    Filed: November 21, 2011
    Publication date: March 15, 2012
    Applicant: Trimble Jena GMBH
    Inventors: Torsten Kludas, Michael Vogel, Christian Grasser, Set Svanholm
  • Patent number: 8085387
    Abstract: An optical instrument and a method for obtaining distance and image information of an object is disclosed to improve the speed and accuracy of data acquisition. The instrument comprises a camera, positioning unit, distance measuring unit, lens arrangement and control unit. The camera acquires images of an object and the control unit defines an area to be scanned and measurement pixels of an object in the image, wherein the measurement pixels are converted into an approximation of coordinates of positions to be measured assuming a default distance to the positions, and the optical axis of the lens arrangement is adjusted sequentially onto the positions to be measured. After measuring the distances to the positions, the coordinates are recalculated increasing the accuracy of the coordinates.
    Type: Grant
    Filed: July 22, 2009
    Date of Patent: December 27, 2011
    Assignee: Trimble Jena GmbH
    Inventors: Torsten Kludas, Michael Vogel, Christian Grasser, Set Svanholm
  • Patent number: 7930835
    Abstract: A method for aiming a surveying instrument towards a selected target is disclosed. The method includes, in at least one embodiment, capturing an image using a camera in the surveying instrument; selecting a target by identifying an object point in the image captured by the surveying instrument; calculating first horizontal and vertical rotation angles based on the object point identified in the image; rotating the surveying instrument over the first horizontal and vertical rotation angles to an intermediate line of sight; measuring a distance to a point along the intermediate line of sight; and calculating second horizontal and vertical rotation angles based on the object point in the image and on the measured distance. In at least one embodiment, the method may be implemented using computer software, hardware, firmware or a combination thereof. There is also disclosed a surveying instrument in which at least one embodiment of the method is implemented.
    Type: Grant
    Filed: January 25, 2007
    Date of Patent: April 26, 2011
    Assignee: Trimble AB
    Inventors: Set Svanholm, Christian Grässer, Michael Vogel, Nick Mein
  • Patent number: 7908752
    Abstract: A geodetic instrument is disclosed, wherein an image sensor is used for locating the instrument above a desired point on the ground. The positioning of the image sensor with respect to the instrument vertical rotation axis is determined, or calibrated, using a method where two images are captured at different horizontal rotational positions for the instrument, and where the center pixel of the image sensor is related to the vertical rotation axis by means of image processing. It is also disclosed how reflecting elements, such as prisms, may be used for providing stereoscopic vision that can be used for determining the instrument height above the ground.
    Type: Grant
    Filed: December 27, 2006
    Date of Patent: March 22, 2011
    Assignee: Trimble AB
    Inventors: Mikael Hertzman, Magnus Westermark, Set Svanholm
  • Publication number: 20110043620
    Abstract: A method is disclosed for determining coordinates of a target in relation to a surveying instrument wherein a first image is captured using a first camera in a first camera position and orientation, a target is selected by identifying at least one object point in the first image, and first image coordinates of the object point in the first image are measured. In at least one embodiment, a second image is captured using a second camera in a second camera position and orientation, the object point identified in the first image is identified in the second image, and second image coordinates of the object point in the second image are measured. Target coordinates of the target in relation to the rotation center of the surveying instrument are then determined based on the first camera position and orientation, the first image coordinates, the second camera position and orientation, the second image coordinates, and first and second camera calibration data.
    Type: Application
    Filed: February 29, 2008
    Publication date: February 24, 2011
    Inventors: Set Svanholm, Michael Vogel, Christian Grässer