OCCUPANT DETECTION DEVICE AND OCCUPANT DETECTION METHOD

• Main Authors: NAKAGOME TAKAYUKI, FUWA RYOHEI, KITO KOSUKE, YAMAZAKI ASAMI
• Format: Patent
• Language: English; Japanese
• Published: 12.03.2024
• Subjects: ANALOGOUS ARRANGEMENTS USING OTHER WAVES; BEDS; CHAIRS; COFFEE MILLS; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; DOMESTIC ARTICLES OR APPLIANCES; FURNITURE; HUMAN NECESSITIES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES; MEASURING; PERFORMING OPERATIONS; PHYSICS; RADIO DIRECTION-FINDING; RADIO NAVIGATION; SEATS SPECIALLY ADAPTED FOR VEHICLES; SOFAS; SPICE MILLS; SUCTION CLEANERS IN GENERAL; TESTING; TRANSPORTING; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDEDFOR; VEHICLES IN GENERAL

To highly accurately detect an occupant regardless of the seating position of the occupant.SOLUTION: An occupant detection device includes: an acquisition unit configured to acquire point cloud information that indicates, based on the intensity of reflection wave generated when a transmission wave transmitted toward a cabin of a movable body is reflected on an object in the cabin, the position of the object moving in the cabin in a three-dimentional coordinate as point cloud including a plurality of detection points; a generation unit configured to generate, based on the point cloud information for each seat row including a plurality of seating areas, a seat row map that indicates the distribution of detection points in a planar region, which corresponds to the arrangement direction of the plurality of seating areas and the height direction of the movable body; a setting unit configured to set, on the seat row map, an upper end line along an upper end portion of a planar point cloud including the plurality of detection points; and an estimation unit configured to estimate the number of occupants for each seat row based on shape characteristics of the upper end line.SELECTED DRAWING: Figure 3 【課題】乗員の着座位置に拘らず乗員を高精度に検知する。【解決手段】乗員検知装置は、移動体の室内に向けて送信された送信波が室内に存在する物体に反射されることにより発生する反射波の強度に基づいて、室内で移動している物体の三次元座標における位置を複数の検知点を含む点群として示す点群情報を取得する取得部と、点群情報に基づいて、複数の着座領域を含むシート列毎に複数の着座領域の配列方向及び移動体の高さ方向に対応する平面領域における検知点の分布を示すシート列マップを生成する生成部と、シート列マップ上で複数の検知点を含む平面点群の上端部に沿って上端線を設定する設定部と、上端線の形状的特徴に基づいてシート列毎に乗員の数を推定する推定部と、を備える。【選択図】図３