JP2542887Y2 - Rear-end collision warning device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rear-end collision warning device which measures an inter-vehicle distance between a vehicle and a following vehicle and issues an alarm.

[0002]

2. Description of the Related Art A laser radar head is attached to the rear of a vehicle body to warn of the approach of a vehicle behind the vehicle, and the reflected light of the emitted laser light hitting the following vehicle is received so that the distance between the vehicle and the following vehicle can be reduced. There is a device which measures the distance and warns the driver when the following vehicle approaches abnormally (Japanese Utility Model Application No. 2-101289).

In this case, a warning for a following vehicle when the danger of a rear-end collision occurs due to a very small inter-vehicle distance is made by turning on or blinking a warning lamp attached to the rear of the vehicle body.

[0004]

By the way, a pair of warning lights are mounted on the left and right sides of the rear surface of the vehicle body. However, when one of the warning lights is turned off, there is a possibility that the warning light may be mistaken for a left turn or a right turn. However, in this case, the function of the rear-end collision warning due to the approach of the original inter-vehicle distance is impaired.

The present invention solves such a problem.
An object of the present invention is to stop a warning for a following vehicle when a warning light is out of a ball and to display a trouble display to a driver.

[0006]

In the present invention, as shown in FIG. 1, a laser radar for measuring an inter-vehicle distance to a following vehicle is illuminated when the measured inter-vehicle distance approaches a predetermined distance. Located on the left and right of the rear of the vehicle, connected in parallel to the power supply
In the rear end collision warning device that includes a pair of warning lights which are continued, a means for detecting a failure of warning light, any one
When the failure of one of the warning lights is detected, the warning operation of the pair of warning lights is stopped, and the failure is displayed by the failure display means.

[0007]

When any one of the warning lamps has a failure such as a broken ball, the detection of the failure and the turning off of the pair of warning lamps are stopped, so that there is no possibility that the following vehicle will be mistaken for a right turn or a left turn. Further, since the driver is notified of the abnormality of the warning light, it is possible to promptly replace the broken ball.

[0008]

FIG. 2 shows an embodiment of the present invention, in which 10 is a laser radar which emits laser light toward a following vehicle and receives the reflected light, and 11 is a vehicle speed for measuring the traveling speed of the own vehicle. The sensor 12 is a control unit that receives signals from these sensors, calculates the distance between the vehicle and the following vehicle, and warns the following vehicle when the distance between the vehicles approaches a predetermined value.

[0013] 13 is installed on the rear surface of the vehicle body and is parallel to the power supply.
A pair of left and right warning lamps, which output current from the control unit 12 via an internal relay and turn on, warn the following vehicle of an abnormal approach. Incidentally, the control unit 12 also displays on the driver's seat for the measured inter-vehicle distance, also, alarm upon occurrence adapted also to recognize the driver.

On the other hand, an ammeter 15 for measuring the current value of the lighting circuit 14 of the warning light 13 is provided in order to detect the burnout of the warning light 13, and the measured value of the ammeter 15 is transmitted to the control unit 12. input. If any one of the warning lamps 13 breaks the ball, the current generated by the lighting circuit 14 greatly changes compared to normal. Therefore, the control unit 12 determines that the ball has run out from the measured current value. In this case, the control unit 12 also stops lighting the normal warning lamp 13 and simultaneously activates the failure indicator lamp 16 provided in the driver's seat. I have.

The operation will be described with reference to the flowchart of FIG.

The control unit 12 includes an ammeter 15
Reads the output i, compares the output i with a predetermined value i _0. When the warning light 13 is out of the ball, the current value is reduced by half compared to the normal time. Therefore, when the current value decreases, it is determined that the warning light 13 has failed, and the following distance between the vehicle and the following vehicle is reduced. Even when approaching within a certain value, the pair of warning lights 13 are not turned on, and the warning to the following vehicle is stopped.

If the warning light 13 is turned on when any one of the warning lights 13 is out of the ball, the remaining lighting lights 13 may cause the following vehicle to be erroneously recognized as a left turn or right turn display. Therefore, in such a case, the warning light 13 is not turned on even if the inter-vehicle distance is short, thereby eliminating the fear of such erroneous recognition. However, if the lamp is left as it is, the original approach warning function is impaired, so that a failure such as a burnout of the warning lamp 13 turns on the failure indicator lamp 16 in the driver's seat to prompt the replacement.

[0014]

According to the present invention as above, according to the invention], the warning light
When a failure such as a burn out in either one occurs, the other
Also turn off the lit warning lights, that is, a pair of
To stop the warning operation of the warning light and eliminate the possibility that the vehicle behind will be mistaken as a turn signal, thereby improving driving safety.
Can be. Further, it is possible to display the running out of ball to the driver by the failure display means to prompt the driver to replace the ball early.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of the present invention.

FIG. 2 is a block diagram showing an embodiment.

FIG. 3 is a flowchart illustrating a control operation.

[Explanation of symbols]

 Reference Signs List 10 laser radar 12 control unit 13 warning light 15 ammeter

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Claims (1)

(57) [Scope of request for utility model registration] 1. A laser radar for measuring an inter-vehicle distance from a following vehicle, and a laser radar disposed on the left and right sides of a rear surface of the vehicle body which is lit when the measured inter-vehicle distance approaches a predetermined distance, and connected in parallel to a power supply.
In the rear end collision warning device that includes a pair of warning lights which are continued, a means for detecting a failure of warning light, any one
A rear-end collision warning device characterized in that when a failure of one of the warning lights is detected, a warning operation of the pair of warning lights is stopped and a failure is displayed by a failure display means.