公开(公告)号：US12066544B2

公开(公告)日：2024-08-20

申请号：US17091029

申请日：2020-11-06

Applicant: Hitachi-LG Data Storage, Inc.

Inventor： Seiji Inaba ,  Katsumi Ito

IPC: G01S17/894 ,  G01S17/08

CPC classification number: G01S17/894 ,  G01S17/08

Abstract: At a preparatory step for correction, in a state that a reflective tape made with a retroreflective material is pasted in advance onto a floor surface of a measurement space in a direction away from the distance-measuring device, a distance La to an inside area of the reflective tape, and a distance Lb to an outside area of the reflective tape adjacent to the inside area are measured by the distance-measuring device, while measurement positions Y are being scanned along the reflective tape. A correction formula for converting the distance Lb to the distance La is created from a relationship between the distance La and the distance Lb obtained at each measurement position Y. At an actual measurement step, a distance (actual measurement value x) to the target object measured by the distance-measuring device is corrected in accordance with the correction formula, and a measurement-distance corrected value y is calculated.