US 11,656,076 B2
Method of calibrating a total station using a GNSS device
Javad Ashjaee, Saratoga, CA (US)
Assigned to Javad GNSS, Inc., San Jose, CA (US)
Filed by Javad GNSS, Inc., San Jose, CA (US); and Mitra Ashjaee, Saratoga, CA (US)
Filed on May 15, 2019, as Appl. No. 16/413,017.
Claims priority of provisional application 62/798,657, filed on Jan. 30, 2019.
Claims priority of provisional application 62/686,592, filed on Jun. 18, 2018.
Claims priority of provisional application 62/671,934, filed on May 15, 2018.
Prior Publication US 2019/0353798 A1, Nov. 21, 2019
Int. Cl. G01C 11/02 (2006.01); G01S 19/26 (2010.01); G01S 19/07 (2010.01); G01S 19/23 (2010.01); G01S 19/12 (2010.01); G01C 15/02 (2006.01); G01S 19/51 (2010.01); G01C 11/00 (2006.01)
CPC G01C 11/02 (2013.01) [G01C 11/00 (2013.01); G01C 15/02 (2013.01); G01S 19/07 (2013.01); G01S 19/12 (2013.01); G01S 19/235 (2013.01); G01S 19/26 (2013.01); G01S 19/51 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A method of calibrating a total station using a GNSS device, said total station including a camera that is adjustable along horizontal and vertical axes with the angles being measured by encoders, wherein said GNSS device includes a communication antenna for receiving position data from a plurality of satellites, said method comprising:
physically coupling the total station with the GNSS device at a first location;
determining the position of the total station at the first location based on position data received by the GNSS device;
decoupling the total station from the GNSS device;
moving the GNSS device to a second location while leaving the total station at the first location;
determining the position of the GNSS device at the second location based on position data received by the GNSS device;
adjusting the position of the camera on the total station to image the GNSS device while at the second location;
determining the axes of the camera based on the orientation of the camera and the determined positions at the first and second locations; and
calibrating the encoders of the total station based on the determined axes.