Driving assistance device and driving assistance method

Abstract

The invention provides a driving assistance device and a driving assistance method. The driving assistance device is provided with an assistance starting part, a self-car information detection part, aside car information detection part, a lane changing judging part, a car type detection part, a lane changing evaluation part and a lane changing deciding part. The assistance starting part is used for starting to assist lane changing when a car changes a lane. The lane changing judging part is used for judging whether a lane that a self car wants to change can be changed or not. The lane changing evaluation part is used for evaluating danger coefficients of lane changing according to the type of the car detected by the car type detection part. The lane changing deciding part is used for deciding whether lane changing is carried out this time according to the danger coefficients evaluated by the lane changing evaluation part. With the driving assistance device and the driving assistance method, the car is assisted when changing the lane. The lane is guided to change the land with lower risk. Therefore, the probability of accidents is reduced.

Description

technical field [0001] The present invention relates to a driving assistance device and a driving assistance method, in particular to judging the type of a vehicle driving in an adjacent lane when the vehicle intends to change a lane, and then estimating the lane change to the lane according to the judgment result. A risk factor, a driving assistance device and a driving assistance method for assisting a vehicle in changing lanes according to the risk factor. Background technique [0002] In the existing technology, when the driver wants to change the lane due to some external environment or the driver himself, it is first necessary to detect the relative distance and relative speed between the own vehicle and other vehicles, and then use the detected data to judge whether it is possible to change the lane. Techniques for making lane changes. [0003] For example, the document Japanese Patent Application Laid-Open No. 2009-78735 records that the relative distance and relati...

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Problems solved by technology

[0004] However, in the above-mentioned technology, when the vehicle changes lanes in a complex environment, even if it can accurately detect the relative distance and relative speed with other vehicles and use these data to accurately determine that the lane change can be performed, the lane change will still be difficult. Afterwards, if there are large vehicles in front and behind of the own vehicle, when the front of the vehicle encounters an unexpected situation and brakes suddenly, the large vehicle driving behind will easily cause traffic accidents such as rear-end collision due to its large inertia. causing unnecessary trouble

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