公开(公告)号：US20240019552A1

公开(公告)日：2024-01-18

申请号：US18336065

申请日：2023-06-16

Applicant: TOPCON CORPORATION

Inventor： Hiroaki SUGIMOTO

IPC: G01S7/481 ,  G01S17/89

CPC classification number: G01S7/4817 ,  G01S17/89 ,  G01S7/4816

Abstract: A technique for solving problems related to intense light that is reflected back from a reflector target in laser scanning, is provided. A processing device controls laser scanning that is performed by a laser scanning apparatus having a light reception unit. The processing device includes a laser scanning apparatus controller, a saturation determination unit, and a variable optical attenuator controller. The laser scanning apparatus controller makes the laser scanning apparatus execute first laser scanning and second laser scanning. The saturation determination unit determines a state of saturation of the light reception unit, with respect to laser-scanned point clouds obtained in the first laser scanning. The variable optical attenuator controller adjusts an intensity of light to be received by the light reception unit in the second laser scanning, based on a result of determination.

公开(公告)号：US20240102800A1

公开(公告)日：2024-03-28

申请号：US18470744

申请日：2023-09-20

Applicant: TOPCON CORPORATION

Inventor： You SASAKI ,  Hideki MORITA ,  Hiroaki SUGIMOTO ,  Yuto SUZUKI ,  Shuichi MINAMIGUCHI ,  Nobuyuki NISHITA ,  Hideyuki MATSUMOTO

IPC: G01C9/06 ,  G01C15/06

CPC classification number: G01C9/06 ,  G01C15/06 ,  G01C2009/066

Abstract: Efficiency of operation related to acquisition of a tilt offset of a surveying apparatus is improved. A total station includes a tilt sensor, a tilt offset acquisition unit that acquires a tilt offset of the tilt sensor, a measurement unit that measures a variable value of a phenomenon that can cause the tilt offset to vary, and a determination unit that determines whether to acquire the tilt offset, based on output from the measurement unit.

公开(公告)号：US20230258450A1

公开(公告)日：2023-08-17

申请号：US18168586

申请日：2023-02-14

Applicant: TOPCON CORPORATION

Inventor： Hiroaki SUGIMOTO ,  Hideki MORITA

IPC: G01C15/00

CPC classification number: G01C15/002

Abstract: A technique for solving problems in laser scanning related to intense light that is reflected back from a reflector target is provided. A laser scanning control device for controlling laser scanning performed by a laser scanning apparatus includes a controller, a distance acquisition unit, and a light controller. The controller executes first laser scanning and second laser scanning. The first laser scanning is performed under conditions in which a detector of the laser scanning apparatus is saturated by light reflected back from each of reflection prisms. The second laser scanning is performed under conditions in which saturation of the detector of the laser scanning apparatus does not occur. The distance acquisition unit acquires distances to the reflection prisms based on the first laser scanning. The light controller adjusts intensity of light to be detected in the second laser scanning, based on the distances to the reflection prisms.