JP3687156B2 - Rear-end collision warning device for automobiles - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The invention of this application relates to an automobile rear-end collision warning device for reducing rear-end collision accidents on a preceding vehicle.
[0002]
[Prior art]
The distance between the vehicle and the preceding vehicle is detected by a radar, and the warning inter-vehicle distance calculated based on the vehicle information such as the speed and acceleration / deceleration of the host vehicle is compared with the detected inter-vehicle distance. Is also known, an apparatus for warning the driver is disclosed, for example, in JP-A-5-38991.
[0003]
As disclosed in the above publication, the conventional alarm uses the driver's vision and hearing.
[0004]
[Problems to be solved by the invention]
However, those using vision have the drawback that their functions are disturbed by sunlight, and those using hearing have the disadvantage that their functions are disturbed by the sound and noise produced by the acoustic equipment.
[0005]
An object of the invention of this application is to provide an automobile rear-end collision warning device whose warning function is not affected by sunlight or sound.
[0006]
[Means for Solving the Problems]
The rear-end collision warning device for an automobile according to the invention of this application is described in claim 1, and, as shown in FIG. 1, the inter-vehicle distance detecting means for detecting the inter-vehicle distance from the preceding vehicle, and predetermined information relating to the own vehicle. A warning inter-vehicle distance calculating means for calculating a warning inter-vehicle distance based on a preceding vehicle, and comparing the inter-vehicle distance detected by the inter-vehicle distance detecting means with the warning inter-vehicle distance calculated by the warning inter-vehicle distance calculating means; When it is small, an alarm necessity determining means for outputting an alarm command signal, and a vehicle speed reducer is activated in response to the alarm command signal output by the alarm necessity determining means to cause the first alarm vehicle deceleration (G1) . Vehicle deceleration device control means to be generated.
[0007]
In the automobile rear-end collision warning device having such a configuration, when the inter-vehicle distance from the preceding vehicle becomes smaller than the warning distance, the vehicle speed reduction device is activated to generate the first warning vehicle deceleration G1 to warn the driver. Since the warning vehicle deceleration is not intended to decelerate the vehicle, it is weak (for example, 0.01 G). As described above, since the warning is performed using the tactile sense of the driver, the warning function is not affected by sunlight or sound.
[0008]
Further, in order to make the driver recognize the alarm with certainty, the vehicle has a vehicle deceleration operation detecting means for detecting a driver's vehicle deceleration operation and inputting a vehicle deceleration operation signal to the vehicle deceleration device control means, and the vehicle deceleration When the vehicle deceleration operation signal is not input within a predetermined time from the start of the operation of the vehicle speed reduction device, the device control means strengthens the operation of the vehicle speed reduction device and is larger than the first warning vehicle deceleration G1 . Preferably, the second warning vehicle deceleration (G2) is generated and the second warning vehicle deceleration G2 is not generated when the vehicle deceleration operation signal is input within the predetermined time. .
[0009]
Further, in conjunction with the generation of the alarm vehicle deceleration , an alarm using vision or an alarm using hearing may be generated.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of an automobile rear-end collision warning device according to this application will be described with reference to the drawings.
[0011]
In FIG. 2, the scanning laser radar 11 detects the inter-vehicle distance from the preceding vehicle, the angle at which the preceding vehicle is located as viewed from the host vehicle, and the relative speed with respect to the preceding vehicle, and inputs the detected distance to the controller 15. The vehicle speed sensor 12 detects the speed of the host vehicle and inputs it to the controller 15. The acceleration / deceleration sensor 13 detects the acceleration and deceleration of the host vehicle and inputs them to the controller 15. The stop switch 14 inputs a brake operation signal to the controller 15 when the brake pedal is depressed. The controller 15 is constituted by a microcomputer, calculates the alarm inter-vehicle distance based on the detection output of the vehicle speed sensor 12 and the detection output of the acceleration / deceleration sensor 13, and then detects the alarm inter-vehicle distance and the scanning laser radar 11. When the former is smaller than the latter, the brake control actuator 19 is connected via the drive circuit 16, the alarm lamp 20 is connected via the drive circuit 17, and the drive circuit 18 is compared. Each of the alarm buzzers 21 is operated, and when the former is greater than or equal to the latter, the brake control actuator 19, the alarm lamp 20 and the alarm buzzer 21 are deactivated at predetermined intervals.
[0012]
The brake control actuator 19 is capable of applying a brake and adjusting the strength of the brake when the driver is not operating the brake. For example, traction control for preventing excessive slip of the drive wheel at the time of start or acceleration. It has the same structure as the actuator. The strength at which the controller 15 operates the brake control actuator 19 when the inter-vehicle distance becomes smaller than the alarm inter-vehicle distance is the strength that generates the alarm vehicle deceleration G1 corresponding to the alarm 1 of the danger level in FIG. . When the brake control actuator 19 is operated to generate the alarm vehicle deceleration G1, the controller 15 monitors whether or not a brake operation signal is input within a predetermined time, and the brake operation signal is input within the predetermined time. If not, the strength at which the brake control actuator 19 is actuated is increased to the strength at which the warning vehicle deceleration G2 corresponding to the danger warning 2 in FIG. 3 is generated. The predetermined time is a time required for the driver to perform a brake operation in response to the generation of the warning vehicle deceleration G1. The controller 15 deactivates the brake control actuator 19, the alarm lamp 20, and the alarm buzzer 21 when a brake operation signal is input within a predetermined time.
[0013]
The means for achieving vehicle deceleration for warning is not limited to the action of the brake.
[0014]
【The invention's effect】
The rear-end collision warning device for an automobile according to the invention of this application is such that when the inter-vehicle distance from the preceding vehicle becomes smaller than the warning distance, the vehicle speed reduction device is actuated to generate a warning vehicle deceleration and warn the driver. The alarm function is not affected by sunlight or sound, and the driver can be surely recognized.
[Brief description of the drawings]
FIG. 1 is a diagram showing a schematic configuration of an automobile rear-end collision alarm device according to the invention of this application.
FIG. 2 is a block diagram showing a configuration of an embodiment of the invention of this application.
FIG. 3 is a diagram showing a relationship between an alarm vehicle deceleration and a danger level.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 11 ... Scanning laser radar 12 ... Vehicle speed sensor 13 ... Acceleration / deceleration sensor 14 ... Stop switch 15 ... Controller 19 ... Brake control actuator 20 ... Alarm lamp 21 ... Alarm buzzer

Claims (1)

An inter-vehicle distance detecting means for detecting an inter-vehicle distance from the preceding vehicle;
A warning inter-vehicle distance calculating means for calculating a warning inter-vehicle distance with respect to a preceding vehicle based on predetermined information about the host vehicle;
Comparing the distance between the vehicles detected by the distance detection means with the distance between the alarms calculated by the alarm distance calculation means, and outputting a warning command signal when the former is smaller than the latter;
Vehicle speed reducer control means for generating a first warning vehicle deceleration by operating a vehicle speed reducer in response to the warning command signal output by the warning necessity determining means;
Vehicle deceleration operation detecting means for detecting a driver's vehicle deceleration operation and inputting a vehicle deceleration operation signal to the vehicle deceleration device control means;
The vehicle deceleration device controlling means, from said first alarm vehicle deceleration strengthen the action of vehicle deceleration device when the vehicle deceleration operation signal from the start of the action of the vehicle speed reduction device within the predetermined time is not input A second warning vehicle deceleration which is larger than the second warning vehicle deceleration, and the second warning vehicle deceleration is not generated when the vehicle deceleration operation signal is input within the predetermined time. .

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