US 12,124,777 B2
Equipment state detection device, equipment state detection method, and program
Masaki Waki, Musashino (JP); Hitoshi Niigaki, Musashino (JP); Hiroaki Tanioka, Musashino (JP); Ryoichi Kaneko, Musashino (JP); Gen Kobayashi, Musashino (JP); and Kazuya Ando, Musashino (JP)
Assigned to NIPPON TELEGRAPH AND TELEPHONE CORPORATION, Tokyo (JP)
Appl. No. 17/413,868
Filed by NIPPON TELEGRAPH AND TELEPHONE CORPORATION, Tokyo (JP)
PCT Filed Dec. 3, 2019, PCT No. PCT/JP2019/047194
§ 371(c)(1), (2) Date Jun. 14, 2021,
PCT Pub. No. WO2020/129614, PCT Pub. Date Jun. 25, 2020.
Claims priority of application No. 2018-235877 (JP), filed on Dec. 17, 2018.
Prior Publication US 2022/0058307 A1, Feb. 24, 2022
Int. Cl. G06F 30/18 (2020.01); G01L 5/10 (2020.01); G06T 17/05 (2011.01); G06F 111/10 (2020.01); G06F 113/16 (2020.01)
CPC G06F 30/18 (2020.01) [G01L 5/10 (2013.01); G06T 17/05 (2013.01); G06F 2111/10 (2020.01); G06F 2113/16 (2020.01); G06T 2210/56 (2013.01)] 4 Claims
OG exemplary drawing
 
1. An equipment state detecting device comprising:
a processor; and
a storage medium having computer program instructions stored thereon, which when executed by the processor, perform to:
receive 3D point group data including three dimensional coordinate points that represent a surface of a cable spanning two structures;
create a 3D model of the cable using the 3D point group data;
acquire a span indicating length of a straight line that connects two ends of the 3D model of the cable;
acquire a sag indicating a movement amount when translating the straight line until the straight line is in contact with the 3D model of the cable at one point; and
calculate a tension of the cable based on the span, the sag, and a known cable load per unit length;
receive 3D point group data including three-dimensional coordinate points that represent surfaces of the structures;
create 3D models of the structures using the 3D point group data;
acquire state information regarding a diameter, an inclination angle, and a bend amount for each of the structures; and
determine if the calculated tension of the cable exceeded design tension of the structures for a specified period of time, and if so, indicate that there is a risk that cracks will form in the structures, the lifetime of the structures will decrease, or any of the structures may fall over in a worst case.