To quantitatively grasp a degree of proximity between moving objects which move in different directions, and appropriately notify a driver of a collision risk between these moving objects.SOLUTION: A collision warning device comprises: a calculation unit that repeatedly calculates a collision tolerance time at a predetermined time interval, which is obtained by dividing a distance between two moving objects by a relative speed of the two moving objects; and an output unit that outputs a warning for at least one of the two moving objects on the condition that the collision tolerance time is equal to or less than a preset threshold. The relative speed is a centripetal relative speed calculated from a centripetal speed of each of the two moving objects, which is a component of a travel speed of each of the two moving objects along a line segment connecting positions of the two moving objects, and the collision tolerance time is a centripetal collision tolerance time obtained by dividing the distance between the two moving objects by the centripetal relative speed.SELECTED DRAWING: Figure 1
【課題】異なる方向に移動する移動体間の接近の程度を定量的に把握して、それら移動体間の衝突リスクを運転者に適切に通知する【解決手段】衝突警報装置は、2つの移動体の間の距離である移動体間距離を上記2つの移動体の相対速度で除算して得られる衝突余裕時間を所定の時間間隔で繰り返し算出する算出部と、上記衝突余裕時間が予め定めた閾値以下であることを条件として上記2つの移動体の少なくとも一方において警報を出力する出力部と、を備え、上記相対速度は、上記2つの移動体のそれぞれの移動速度の、上記2つの移動体の位置を結ぶ線分に沿った成分である向心速度から算出される向心相対速度であり、上記衝突余裕時間は、上記2つの移動体の間の距離を上記向心相対速度により除算して得られる向心衝突余裕時間である。【選択図】図1
COLLISION WARNING DEVICE AND COLLISION WARNING METHOD
衝突警報装置及び衝突警報方法
2024-09-20
Patent
Electronic Resource
Japanese
IPC: | G08G Anlagen zur Steuerung, Regelung oder Überwachung des Verkehrs , TRAFFIC CONTROL SYSTEMS |
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