To prevent an alarm from being issued when a driver is looking ahead carefully now even if the driver did not look ahead carefully during a certain period in the past.SOLUTION: A safe driving determination device 4 comprises an angular value calculation unit 421 for calculating an angular value indicating a driver's face direction angle with respect to a traveling direction, and a determination unit 422 for determining whether the driver is looking ahead carefully based on whether the integrated value of angular values during a predetermined first determination period in the past is equal to or greater than a threshold. The determination unit determines that the driver is not looking ahead carefully when the integrated value of angular values during the predetermined first determination period in the past is equal to or greater than a first threshold and when the driver's angular value at the present moment is equal to or greater than a second threshold. The determination unit does not determine that the driver is not looking ahead carefully when the driver's angular value at the present moment is less than a second threshold even if the integrated value of angular values during the predetermined first determination period in the past is equal to or greater than the first threshold.SELECTED DRAWING: Figure 1
【課題】過去の一定期間内に運転者が前方不注視状態だったとしても、運転者が現時点で前方不注視状態でない場合には警報を発しないようにする。【解決手段】安全運転判定装置4は、進行方向に対する運転者の顔向き角度を示す角度値を算出する角度値算出部421と、過去の所定の第1判定期間内の角度値の積算値が閾値以上であるか否かに基づいて、運転者が前方不注視状態であるか否かを判定する判定部422と、を有し、判定部は、過去の所定の第1判定期間内の角度値の積算値が第1閾値以上であり、かつ現時点で運転者の角度値が第2閾値以上である場合に運転者が前方不注視状態であると判定し、過去の所定の第1判定期間内の角度値の積算値が第1閾値以上であっても、現時点で運転者の角度値が第2閾値未満である場合に運転者が前方不注視状態であると判定しない。【選択図】図1
SAFE DRIVING DETERMINATION DEVICE
安全運転判定装置
2021-09-24
Patent
Electronic Resource
Japanese
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