US 11,887,250 B2
Guide display device and crane equipped with same
Iwao Ishikawa, Kagawa (JP); Takayuki Kosaka, Kagawa (JP); Keita Mashima, Kagawa (JP); Satoshi Kubota, Osaka (JP); Shigenori Tanaka, Osaka (JP); Masaya Nakahara, Osaka (JP); and Koki Nakahata, Osaka (JP)
Assigned to TADANO LTD., Kagawa (JP); and THE SCHOOL CORPORATION KANSAI UNIVERSITY, Osaka (JP)
Appl. No. 17/911,288
Filed by TADANO LTD., Kagawa (JP); and THE SCHOOL CORPORATION KANSAI UNIVERSITY, Osaka (JP)
PCT Filed Mar. 23, 2021, PCT No. PCT/JP2021/012008
§ 371(c)(1), (2) Date Sep. 13, 2022,
PCT Pub. No. WO2021/193641, PCT Pub. Date Sep. 30, 2021.
Claims priority of application No. 2020-056813 (JP), filed on Mar. 26, 2020.
Prior Publication US 2023/0128542 A1, Apr. 27, 2023
Int. Cl. G06T 15/40 (2011.01); B66C 13/46 (2006.01)
CPC G06T 15/40 (2013.01) [B66C 13/46 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A guide display device of a crane, comprising:
a data processing section configured to calculate a representative point for each grid cell by using point group data acquired with a laser scanner by scanning a lifting cargo and a ground surface from above the lifting cargo, create a three-dimensional map based on the representative point, and update the three-dimensional map when a representative point calculated anew and an existing representative point are different from each other,
wherein when an occlusion region is generated in the three-dimensional map, the data processing section does not perform update for the occlusion region even when the representative point calculated anew and the existing representative point are different from each other, the occlusion region being a shadow of the lifting cargo.