公开(公告)号：US20210270971A1

公开(公告)日：2021-09-02

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

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.

公开(公告)号：US20210231783A1

公开(公告)日：2021-07-29

申请号：US17086525

申请日：2020-11-02

Applicant: Hitachi-LG Data Storage, Inc.

Inventor： Katsumi ITO ,  Seiji INABA

IPC: G01S7/4865 ,  G01S7/497 ,  G01S17/10

Abstract: As a preparatory step for correction, a measurement sample is placed such that a distance of the measurement sample from the distance measuring device becomes a set value L1, a distance to the measurement sample 3′ is measured by the distance measuring device, and a measurement value L2 is obtained. The measurement value L2 corresponding to a plurality of values of the set value L1 is acquired, while the set value L1 is changed to the plurality of values, and a correction formula for converting the measurement value L2 to the set value L1 is created on a basis of a relationship between the acquired set value L1 and measurement value L2. As an actual measurement step, a distance (actual measurement value x) to the target object 3 measured by the distance measuring device is corrected in accordance with the correction formula, and a measurement-distance corrected value y is calculated.

公开(公告)号：US20220390604A1

公开(公告)日：2022-12-08

申请号：US17720169

申请日：2022-04-13

Applicant: Hitachi-LG Data Storage, Inc.

Inventor： Seiji INABA

IPC: G01S17/10 ,  G01S17/894 ,  G01S7/4865

Abstract: Provided are a TOF apparatus, a TOF system, and an installation status notification method that can automatically determine the quality of installation and reduce the loss of performing re-construction work. The TOF apparatus includes a processor. The processor executes an anomaly determination program, which is a program used to determine whether the installation state is normal or anomaly. By executing the anomaly determination program, the processor determines whether the installed state is normal or anomaly based on at least one of the viewpoints of the installation angle, the influence of interference, the field of view, and the measurement distance, and notifies the determination result.