JPH09142203A - Rear-end collision alarm device for automobile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the possibility of a rear-end collision, by operating a rear- end collision alarm by outputting an alarm operating command signal for a following vehicle, when the vehicle deceleration detected by a vehicle deceleration detecting means exceeds a prescribed threshold value. SOLUTION: A vehicle deceleration sensor 1 inputs a vehicle deceleration signal to a comparator 2 to compare with a prescribed threshold value, and when it is the threshold value or more, the 1 signal is input to an OR gate, and when less than the threshold value, the 0 signal is input to the OR gate 3. To the OR gate 3, the 1 signal is input front the ABS(antilock brake system) 4 when the ABS is operated, and the 0 signal is input when the ABS is not operated. Furthermore, to the OR gate 3, the 1 signal is input from an automatic brake device 5 when a sudden brake is operated, while the 0 signal is input in the other condition. When either one of the input signals from the comparator 2, the ABS 4, and the automatic brake device 5 is the 1, the OR gate 3 inputs the 1 signal to a lamp device driving circuit 6. Responding to the input of the 1 signal, a hazard lamp 7 and an annunciator 8 are operated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The invention of the present application relates to a vehicle rear-end collision warning device for reducing rear-end collision accidents.

[0002]

2. Description of the Related Art In today's automobiles, a stop lamp mounted on the rear portion of the automobile is turned on during braking. The lighting of the stop lamp calls attention to the driver of the following vehicle to prevent a rear-end collision.

[0003]

However, in the configuration in which the stop lamp is turned on during braking, the driver of the following vehicle can understand that the preceding vehicle is braking, but it is completely unknown whether or not the vehicle is in sudden braking. Since it does not exist, there is a possibility that the response when the preceding vehicle suddenly brakes will be delayed and a rear-end collision will occur.

An object of the invention of this application is to provide a rear-end collision warning device for a vehicle, which further reduces the possibility that a succeeding vehicle will collide with the preceding vehicle when the preceding vehicle decelerates.

[0005]

According to another aspect of the present invention, there is provided a rear-end collision warning device for an automobile, as set forth in claim 1.
The vehicle deceleration detecting means for detecting the vehicle deceleration and the vehicle deceleration detected by the vehicle deceleration detecting means are compared with a predetermined threshold value, and if the vehicle deceleration exceeds the predetermined threshold value, the following vehicle. For outputting an alarm device operation command signal for operating a rear-end collision alarm device, and an alarm device control device for operating an alarm device in response to an alarm device operation command signal output by this control device. Is.

In the vehicle rear-end collision warning device having such a configuration, the stop lamp is turned on when the vehicle is not in the sudden braking by setting the predetermined threshold value to a value slightly lower than the vehicle deceleration during the sudden braking. , The alarm is activated during sudden braking. Therefore, the driver of the following vehicle can identify whether the preceding vehicle has applied the sudden braking or the normal braking, and can take the rear-end collision avoidance action corresponding to the braking method of the preceding vehicle. Therefore, the possibility of a rear-end collision is further reduced.

The alarm device may be equipped with a dedicated alarm device, but it is preferable in terms of price to use the existing lighting device. For example, the existing hazard lamps may be blinked, the stop lamps may be blinked, or all the lamps that are visible to the driving vehicle of the following vehicle may be lit or blinked. Furthermore, with multiple predetermined thresholds, the type and number of lamps to be activated can be changed according to the level of vehicle deceleration,
It is preferable to change the blinking cycle.

Further, although an anti-lock brake device (hereinafter referred to as ABS) is becoming popular nowadays, if the control means is linked to the ABS so that an alarm operation command signal is output even when the ABS is in operation. Even if the road surface is slippery, the alarm device operates and alerts the driver of the following vehicle, so that the possibility that the following vehicle may collide with the preceding vehicle is further reduced.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of an automobile rear impact warning device according to the present application will be described below with reference to the drawings.

In FIG. 1, a vehicle deceleration sensor 1 inputs a vehicle deceleration signal representing a vehicle deceleration to a comparator 2. The comparator 2 compares the vehicle deceleration detected by the vehicle deceleration sensor 1 with one predetermined threshold value and outputs a "1" signal when the former is equal to or higher than the latter, and when the former is less than the latter. At some time, a "0" signal is input to the OR gate 3. To the OR gate 3, a "1" signal is input from the ABS 4 when the ABS is operating, and a "0" signal is input when the ABS is not operating. Further, to the OR gate 3, a "1" signal is input from the automatic braking device 5 when the sudden braking of the automatic braking is performed, and a "0" signal is input at times other than the sudden braking. The OR gate 3 inputs a “1” signal to the lighting equipment drive circuit 6 when any one of the input signals from the comparator 2, the ABS 4 and the automatic braking device 5 is “1”. The lighting equipment drive circuit 6 is
In response to the input of the "1" signal from the OR gate 3, the hazard lamp 7 blinks at a predetermined cycle to notify the driver of the succeeding driver and activate the alarm 8 for the driver. The driving of the hazard lamp 7 and the alarm 8 by the lighting equipment drive circuit 6 is maintained even when the input signal from the OR gate 3 is switched from "1" to "0", and the driver operates the reset switch 9 to reset. When the reset signal is input from the switch 9 to the lighting equipment drive circuit 6, the driving of the hazard lamp 7 and the alarm 8 by the lighting equipment drive circuit 6 is stopped.

A wheel brake fluid pressure detector may be provided so that a reset signal is input to the lighting equipment drive circuit when the wheel brake fluid pressure becomes zero.

[0012]

The rear-end collision warning device for a vehicle according to the invention of the present application issues a warning corresponding to the magnitude of the vehicle deceleration to the driver of the following vehicle, and also a warning when the ABS is activated. Therefore, the possibility that the following vehicle will collide with the preceding vehicle is further reduced.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a first embodiment of the invention of this application.

[Explanation of Codes] 1 ... Vehicle deceleration sensor 2 ... Comparator 3 ... OR gate 4 ... ABS 5 ... Automatic breathing device 6 ... Lighting equipment drive circuit 7 ... Hazard lamp 8 ... Alarm 9 ... Reset switch

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code Agency reference number FI Technical display location G08G 1/16 G08G 1/16 E

Claims (2)

[Claims] 1. A vehicle deceleration detecting means for detecting a vehicle vehicle deceleration, and comparing the vehicle deceleration detected by the vehicle deceleration detecting means with a predetermined threshold value so that the vehicle deceleration exceeds a predetermined threshold value. Control means for outputting an alarm device operation command signal for operating a rear-end collision alarm device for a following vehicle, and alarm device control means for operating an alarm device in response to the alarm device operation command signal output by this control means. A rear-end collision warning device for vehicles equipped with. 2. The rear-end collision warning device for an automobile according to claim 1, wherein the control means is linked to the antilock brake device so that the alarm operation command signal is output even when the antilock brake device is activated. Rear-end collision warning device for automobiles.