公开(公告)号：US10753739B2

公开(公告)日：2020-08-25

申请号：US16100682

申请日：2018-08-10

Applicant: TOPCON CORPORATION

Inventor： Yasuo Terashima ,  Yasushi Tanaka

IPC: G01C15/00 ,  F16C35/077 ,  F16C25/08

Abstract: A structure applies a pre-load to a rolling bearing, which makes pre-load control easier than heretofore and enables low cost production. A pre-load applying structure is configured to apply a pre-load to a bearing of a scanning part of a three-dimensional survey device. The three-dimensional survey device includes the bearing having an inner ring to which a vertically rotating shaft is fixed, a scanning mirror attached to the vertically rotating shaft, and a motor for rotationally driving the vertically driving shaft. The pre-load applying structure has a sleeve that engages with an outer ring of the bearing, a plate spring that detachably engages with the sleeve and is fastened to a housing body with a screw, and a ring that detachably join the sleeve and the plate spring. The plate spring applies the pre-load to the outer ring via the sleeve by elastic deforming.

公开(公告)号：US10732298B2

公开(公告)日：2020-08-04

申请号：US15838754

申请日：2017-12-12

Applicant: Topcon Corporation

Inventor： Nobuyuki Nishita ,  Yasuo Terashima

IPC: G01S19/51 ,  B64C39/02 ,  G01C21/20 ,  G01S19/07 ,  G01S19/11 ,  G01C15/00 ,  G01S19/48 ,  G01S19/15 ,  G01S17/66 ,  G01S17/42

Abstract: A technique for more reliably capturing a lost unmanned aerial vehicle in tracking the unmanned aerial vehicle by a surveying device is provided. A UAV search controlling part configured to be used in a search for an unmanned aerial vehicle that flies along a predetermined flight path includes an estimating part and a search controlling part. The estimating part estimates, on the basis of location data of a surveying device that surveys a location of the unmanned aerial vehicle by using laser light and on the basis of the predetermined flight path, a direction of the unmanned aerial vehicle as seen from the surveying device at a specific time. The search controlling part controls to allow the surveying device to search for the unmanned aerial vehicle, on the basis of the estimated direction.