THREE-DIMENSIONAL DISTANCE MEASURING DEVICE

• Main Authors: MATSUURA NAOYA, IZUMI KATSUHIKO, KAMISADA TOSHIMASA
• Format: Patent
• Language: English; Japanese
• Published: 22.03.2019
• Subjects: ANALOGOUS ARRANGEMENTS USING OTHER WAVES; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES; MEASURING; PHYSICS; RADIO DIRECTION-FINDING; RADIO NAVIGATION; TESTING

To provide a three-dimensional distance measuring device using a TOF method, in which the range and luminous power of irradiation light is appropriately set in accordance with the state of a subject and the degradation of accuracy of distance measurement is suppressed.SOLUTION: The three-dimensional distance measuring device comprises: a plurality of light sources 11 for irradiating a subject with light; an emission control unit 12 for controlling the emission of light of the plurality of light sources; a light-receiving unit 13 for detecting reflected light from the subject; a distance calculation unit 14 for calculating the distance to the subject on the basis of the propagation time of reflected light; and an image processing unit 15 for generating a distance image of the subject on the basis of the calculated distance data. A plurality of irradiation areas 3 irradiated by the plurality of light sources are arranged in such a way that only adjacent irradiation areas overlap each other. The emission control unit 12 can individually turn the plurality of light sources 11 on or off or individually adjust the luminous power.SELECTED DRAWING: Figure 1 【課題】ＴＯＦ法を用いる３次元距離測定装置において、被写体の状況に応じて照射光の範囲や光量を適切に設定し、距離測定の精度の劣化を抑えること。【解決手段】３次元距離測定装置は、被写体に光を照射する複数の光源１１と、複数の光源の発光を制御する発光制御部１２と、被写体からの反射光を検出する受光部１３と、反射光の伝達時間に基づき被写体までの距離を算出する距離計算部１４と、算出した距離データに基づき被写体の距離画像を生成する画像処理部１５と、を備える。ここに複数の光源により照射される複数の照射領域３は、隣接する照射領域とのみ互いに重なるように配置されている。また発光制御部１２により、複数の光源１１に対し、各々個別に点灯または消灯、あるいは発光量の調整が可能である。【選択図】図１