US 12,359,908 B2
Member distinguish apparatus, member distinguish method, and computer-readable medium
Akira Tsuji, Tokyo (JP)
Assigned to NEC CORPORATION, Tokyo (JP)
Appl. No. 17/610,748
Filed by NEC Corporation, Tokyo (JP)
PCT Filed May 24, 2019, PCT No. PCT/JP2019/020598
§ 371(c)(1), (2) Date Nov. 12, 2021,
PCT Pub. No. WO2020/240609, PCT Pub. Date Dec. 3, 2020.
Prior Publication US 2022/0236050 A1, Jul. 28, 2022
Int. Cl. G01B 11/24 (2006.01)
CPC G01B 11/24 (2013.01) 10 Claims
OG exemplary drawing
 
1. A member distinguishing apparatus comprising:
a three-dimensional sensor configured to irradiate one or more members to be inspected with a beam and acquire first point group data based on at least amplitude information of light;
a point group data analysis unit configured to extract second point group data from the first point group data, the second point group data being point group data of the member to be inspected, and obtain, with respect to the second point group data, a distribution of the point group data in a vertical direction, the vertical direction being a longitudinal direction of the member to be inspected, a lateral direction orthogonal to an irradiation direction of the beam when an area of a surface of the member to be inspected irradiated by the three-dimensional sensor becomes the largest and also orthogonal to the vertical direction, and a depth direction orthogonal to the longitudinal direction and the lateral direction; and
a member distinguishing unit configured to distinguish a type of the member to be inspected from the distribution, wherein
the point group data analysis unit is configured to, in a reference three-dimensional orthogonal coordinate system composed of a first axis, a second axis, and a third axis and configured in such a way that the vertical direction is parallel to the third axis and the lateral direction is along a plane including the first axis and the second axis, rotate and convert the second point group data, the lateral direction, and the depth direction based on an angle formed by a direction, in which the irradiation direction of the beam is projected onto the plane including the first axis and the second axis, and the first axis so that the lateral direction becomes parallel to a plane including the first axis and the third axis and obtain the distribution of the second point group in each of the vertical direction, the lateral direction, and the depth direction.