LIDAR DEVICE

• Main Authors: TOYODA YUICHI, BEPPU TARO
• Format: Patent
• Language: English; Japanese
• Published: 04.04.2022
• 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 LIDAR device with which it is possible to achieve suitable balance between suppressing the irradiation density of a laser beam to low levels and satisfying a required resolution.SOLUTION: A CPU 22 shifts to a mode for detecting a low-back object early that is an obstacle in the vicinity of a road when obstacles or preceding vehicles ahead in the progression direction of a vehicle are not recognized. In this mode, the CPU 22 sets the distance as a detection object in accordance with a vehicle speed SPD and defines a search plane perpendicular to a road surface at a position away from the vehicle by the distance. The CPU 22 raises the irradiation density of a laser beam in an area where the distance to the road surface on the search plane is smaller than or equal to a prescribed value to a higher level than in other areas.SELECTED DRAWING: Figure 1 【課題】レーザ光の照射密度を低く抑えることと、要求される分解能を満たすこととの好適な折衷を図ることのできるＬＩＤＡＲ装置を提供する。【解決手段】ＣＰＵ２２は、車両の進行方向前方に障害物や先行車を認知していない場合、路面付近の障害物である低背物を早期に検知するためのモードに移行する。このモードにおいて、ＣＰＵ２２は、車速ＳＰＤに応じて検知対象とする距離を設定し、車両からその距離だけ離れた位置において路面に垂直なサーチ面を定義する。ＣＰＵ２２は、サーチ面における路面との距離が所定値以下である領域におけるレーザ光の照射密度を他の領域よりも高くする。【選択図】図１