Drive assist device

Abstract

A drive assist device provided with: a blind spot recognition unit for recognizing the blind spot of a driver in the traveling direction of a host vehicle; a moving body information setting unit for setting a set of moving body information which at least contains the estimated speed of the moving body as information pertaining to a moving body which may appear from the blind spot; a speed region computation unit for computing, on the basis of the moving body information set by means of the moving body information setting unit, the speed region of the host device in which the host vehicle may come into contact with the moving body when moving in the traveling direction; a target speed computation unit for computing the target speed of the host vehicle on the basis of the speed region; and a target speed profile creation unit for creating a target speed profile for reducing the speed of the host vehicle from the current speed to a blind spot entry target speed on the basis of the current speed of the host vehicle, the target acceleration rate for reducing speed, and the blind spot entry target speed which is the target speed of the host vehicle when entering a region constituting the blind spot.

Description

technical field [0001] The invention relates to a driving assistance device. Background technique [0002] As a conventional driving assistance device, there is known a device that considers an object suddenly appearing from a blind spot when entering an intersection or the like, and performs driving assistance. For example, the driving assistance device in Patent Document 1 predicts the road ahead of the host vehicle, recognizes a blind spot for the driver in the traveling direction of the host vehicle, predicts an object that may suddenly appear from the blind spot, and detects whether the object can move. If the range overlaps with the predicted course of the host vehicle, it is determined that there is a possibility of collision, and driving assistance is performed to avoid the collision. [0003] Patent Document 1: Japanese Patent Laid-Open No. 2006-260217 [0004] However, conventional driving assistance devices perform driving assistance by using the predicted cours...

AI Technical Summary

Problems solved by technology

Therefore, conventional driving assistance devices avoid collisions by judging whether there is a collision when traveling on the current predicted road, and cannot calculate how much to reduce the speed to avoid collisions, how much to dodge to avoid collisions, etc.

In addition, the collision judgment of conventional driving assistance devices largely depends on the prediction accuracy of the vehicle's future position

Therefore, when the prediction accuracy decreases (for example, when the host vehicle is accelerating, decelerating, or steering), the accuracy of collision determination may decrease.

In this case, the conventional driving assistance device may give the driver a sense of discomfort by performing unnecessary driving assistance or not performing driving assistance at the necessary timing.

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