US 11,940,262 B2
Surveying instrument for and surveying method of surveying reference points
Dennis Van Weeren, Nieuw Vennep (NL); Arnoud Marc Jongsma, Vijfhuizen (NL); Joachim Ulrich Seibert, Rijswijk (NL); and Mario Josephus De Bijl, The Hague (NL)
Assigned to FNV IP B.V., Leidschendam (NL)
Appl. No. 16/963,767
Filed by FNV IP B.V., Leidschendam (NL)
PCT Filed Jan. 22, 2019, PCT No. PCT/NL2019/050037
§ 371(c)(1), (2) Date Jul. 21, 2020,
PCT Pub. No. WO2019/143250, PCT Pub. Date Jul. 25, 2019.
Claims priority of application No. 2020304 (NL), filed on Jan. 22, 2018; and application No. 2021199 (NL), filed on Jun. 28, 2018.
Prior Publication US 2021/0041220 A1, Feb. 11, 2021
Int. Cl. G01B 11/00 (2006.01); G01B 11/16 (2006.01); G01C 11/06 (2006.01); G06T 7/246 (2017.01); H04N 23/51 (2023.01); H04N 23/56 (2023.01)
CPC G01B 11/002 (2013.01) [G01B 11/161 (2013.01); G01C 11/06 (2013.01); G06T 7/248 (2017.01); H04N 23/51 (2023.01); H04N 23/56 (2023.01)] 31 Claims
OG exemplary drawing
 
1. An apparatus for monitoring positions on an external object having at least one beacon attached thereto, the apparatus comprising:
at least one non-refractive optical element configured as objective for projecting light on at least one image sensor and configured to receive at least one light beam transmitted from the at least one beacon and project the at least one light beam on the at least one image sensor, wherein the at least one non-refractive optical element comprises a diffractive element configured to diffract the at least one light beam to form a diffracted light pattern on the at least one image sensor;
the at least one image sensor configured to form image data based on the at least one light beam and background light; and
a processing unit configured to enable communication with a memory storing a computer program comprising instructions and data, which when executed by the processing unit, causes the processing unit to:
process the image data to filter image data components relating to the background light and render image data components relating to the at least one light beam;
identify the at least one beacon within the image data based on the at least one light beam;
determine current location data of the at least one beacon based on the image data;
compare the current location data with former location data of the at least one beacon as stored in the memory; and
determine whether the object has moved relative to a fixed reference frame based on the comparison.