Overspeed predicting device

オーバースピード予測装置

Abstract

PURPOSE: To urge the driver's attention as required for safety driving by calculating the estimated lateral acceleration with the radius of curvature of a road in front of a vehicle and the vehicle speed, and comparing it with the threshold value determined by the turning capability. CONSTITUTION: A navigation controller 9 receives the data of the position and travel direction of a vehicle from a locator device 8 at every fixed travel distance or travel time and searches a road in the front direction, i.e., multiple links (connecting coordinate positions and nodes specifying the intersections of the road) within the preset distance are obtained. Radiuses of curvature are calculated from the distances and bearings of the links, the minimum radius is selected among them, and it is determined as the radius of curvature of the front road. The lateral acceleration of the road is calculated based on the output of a distance sensor 4, and it is compared with the threshold value determined by the turning capability of the vehicle. When the calculated lateral acceleration exceeds the threshold value, it is judged dangerous to turn the curve at the present speed, and a warning is given to the driver via a buzzer or the like. COPYRIGHT: (C)1993,JPO&Japio
(57)【要約】 【構成】地図マッチング方式により検出された車両の現 在位置の前方にある道路を、道路地図メモリを用いて探 索し、その道路の曲率半径Rを算出し、検出された車両 の速度vを用いて車両が受けると予測される横加速度G を算出し、しきい値G 0 とを比較し、しきい値G 0 を超 えている時にはドライバに注意を促す。 【効果】前方にカーブがあるときに、高速度の車両の速 度を充分に落として、ドライバに安全な運転をさせるこ とができる。

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Cited By (12)

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    DE-19730336-C2October 14, 1999Toyota Motor Co LtdFahrzeugantriebsbedingungs-Prädiktionseinrichtung, die Prädiktionseinrichtung verwendende Warneinrichtung und Verfahren zum Aufbereiten von Daten für die Prädiktion
    DE-19815855-B4December 20, 2007Honda Giken Kogyo K.K.System zur Bestimmung, ob ein Fahrzeug passieren kann
    JP-2008112162-AMay 15, 2008Navigation Technol Corp, ナヴィゲイション テクノロジーズ コーポレイションBowing coefficient representation of curvature of geographic feature
    JP-2013120405-AJune 17, 2013Yazaki Energy System Corp, 矢崎エナジーシステム株式会社Driving support device
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