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Driving assist device

An auxiliary device, driving state technology, applied in the control device, transportation and packaging, input parameters of external conditions, etc., can solve the problems of the reliability of the prediction result of the driving lane, and the inability to detect the distance stably.

Active Publication Date: 2012-12-12
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

That is, if the vehicles in the side lanes are parallel, there is a problem that the distance from the objects on the side of the road (side walls, guardrails) to the vehicle cannot be detected stably, and the reliability of the prediction result of the driving lane will decrease.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0026] figure 1 It is a figure which shows the structure of the driving assistance system in this invention. exist figure 1 Among them, the driving assistance system 1 includes a driving assistance device built in an ECU (Electric Control Unit: Electronic Control Unit) 2 that is electronically controlled in the vehicle, distance sensors 3a, 3b, wheel speed sensors 4a, 4b, turn indicators 5, Navigation system 6, and output device 7. The distance sensors 3a and 3b are installed on the left and right sides of the front or rear of the vehicle, emit detection waves and receive reflected waves of the detection waves from the detection target to detect the distance to the detection target sensor. Examples of detection waves include ultrasonic waves, laser light, radio waves, and the like.

[0027] The wheel speed sensors 4a and 4b are sensors provided on the right and left rear wheels of the host vehicle, and detect the wheel speed (the number of pulses corresponding to the rotat...

Embodiment approach 2

[0080] The configuration of the second embodiment is basically the same as that of the first embodiment, but differs from the first embodiment in that the running state determination unit determines that the vehicle meanders, so-called "swaying", as the running state of the own vehicle. Therefore, the structure of the driving assistance device in Embodiment 2 can refer to figure 2 .

[0081] Figure 12 It is a figure for demonstrating the determination process of a running state by the running state determination part 11 of Embodiment 2. The distance data indicating the position of the host vehicle in the width direction of the road corrected by the host vehicle position correcting unit 9 is sequentially input into the traveling state determination unit 11 as time-series information indicating the position of the host vehicle in the direction of the width of the road. , and use the time-series information to determine the driving state of the host vehicle 13 .

[0082] Her...

Embodiment approach 3

[0089] The structure of the third embodiment is basically the same as that of the first embodiment, but differs from the first embodiment in the following point: that is, in the case of frequently observing reflected waves by transmitting ultrasonic waves from ultrasonic sensors installed on the left and right sides of the vehicle once , the vehicle position correction unit sets the transmission sensitivity of the ultrasonic sensor to be higher and the reception sensitivity to be lower, and when the speed of the vehicle is faster than the specified speed, the vehicle position correction unit sets the ultrasonic sensor The transceiver sensitivity is set higher. Therefore, the structure of the driving assistance device in Embodiment 3 can refer to figure 2 .

[0090] Figure 13 It is a diagram for explaining the adjustment of the transmission sensitivity and reception sensitivity of the ultrasonic sensor performed by the host vehicle position correcting unit 9 according to th...

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Abstract

A driving assist device detects the position of a vehicle 13 in a direction of the width of a road by using both distance data on both right and left sides of the vehicle and road width data on the width of the road, specifies distance data having a time-varying change equal to or larger than a predetermined threshold from among the distance data showing the vehicle position detected to correct the vehicle position in such a way that the vehicle position is shown by the distance data from which the distance data specified are removed when the travelling path of the vehicle 13 shows a straight ahead movement, determines the travelling state of the vehicle 13 from a time-varying change of the vehicle position corrected, and notifies a content according to the travelling state determined.

Description

technical field [0001] The present invention relates to a driving assistance device for assisting the running of the own vehicle by notifying the position of the own vehicle in the width direction of the traveling path, the inter-vehicle distance, and the determination result of the running state. Background technique [0002] In the conventional system disclosed in Patent Document 1, the position of the host vehicle in the width direction of the driving path is obtained based on the side walls and guardrails on both sides of the driving path detected by the sensors of the vehicle. The vehicle's position in the width direction of the driving path, and the number of lanes on one side of the driving path and the road width information obtained from the navigation system are used to predict the lane that the vehicle is currently driving. In this system, based on the prediction result, the driver is instructed to change lanes or the like. [0003] In the above system, during th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G08G1/16
CPCB60W30/12B60W2520/28G08G1/167B60W2550/308B60W2554/801
Inventor 井上悟三次达也西本幸生
Owner MITSUBISHI ELECTRIC CORP
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