RANGING DEVICE, DISTANCE CORRECTION METHOD, AND RANGING PROGRAM

• Main Authors: SUGIYAMA HISATAKA, ITO KATSUMI, IZUMI KATSUHIKO
• Format: Patent
• Language: English; Japanese
• Published: 27.05.2024
• Subjects: ANALOGOUS ARRANGEMENTS USING OTHER WAVES; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; GYROSCOPIC INSTRUMENTS; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES; MEASURING; MEASURING DISTANCES, LEVELS OR BEARINGS; NAVIGATION; PHOTOGRAMMETRY OR VIDEOGRAMMETRY; PHYSICS; RADIO DIRECTION-FINDING; RADIO NAVIGATION; SURVEYING; TESTING

To provide a ranging device, a distance correction method, and a ranging program capable of easily correcting a distance error occurring because of a multipath phenomenon.SOLUTION: A ranging device includes: an irradiation unit applying measurement light to a measurement object; a light receiving sensor receiving reflection light from a measurement object and detects the amount of exposure based on the reflection light; a storage unit storing correction information showing a correction expression set including multiple correction expressions and application distance ranges of the respective correction expressions; and a distance calculation unit calculating measurement distance to a measurement object on the basis of the amount of exposure. The distance calculation unit executes distance correction calculation for calculating measurement distance after correction by correcting the measurement distance by using a correction expression corresponding to an application distance range including the measurement distance from among the multiple correction expressions included in the correction expression set on the basis of the correction information stored in the storage unit.SELECTED DRAWING: Figure 1 【課題】簡単にマルチパス現象により発生する距離誤差を補正することができる測距装置、距離補正方法及び測距プログラムを提供する。【解決手段】測距装置は、測定対象物に測定光を照射する照射部と、測定対象物からの反射光を受光し、反射光に基づく露光量を検出する受光センサと、複数の補正式及び各補正式の適用距離範囲を含む補正式セットを示す補正情報を格納する記憶部と、露光量に基づいて測定対象物までの計測距離を計算する距離計算部と、を備える。距離計算部は、記憶部に格納された補正情報に基づいて、補正式セットに含まれる複数の補正式のうちの、計測距離が含まれる適用距離範囲に対応する補正式を用いて、計測距離を補正することにより、補正後計測距離を算出する距離補正計算を実行する。【選択図】図１