JPH06262988A - Alarm display device for prevention of double car collision - Google Patents

Abstract

PURPOSE:To provide a double collision preventing alarm display device which informs following car(s) of its foregoing car being in the braked condition by installing a receiver and transmitter at the front and rear, respectively, of each car, and transmitting a brake signal given by the car directly ahead automatically to the following car. CONSTITUTION:When a car 1 undergoes steep braking at the time t1, a brake lamp 13-1 is lighted up, and at the same time, an electric wave signal is transmitted from a transmitter 6-1 to be received by a receiver 5-2 provided on another car 2. The receiver 5-2 lights up an indicator lamp 7-2, and at the same time, an electric wave signal is transmitted from a transmitter 6-2 to be received by a receiver 5-3 on a third car 3, where an indicator lamp 7-3 is lighted and an electric wave signal is transmitted from a transmitter 6-3. Thereby the indicator lamps of the cars 1, 2, 3 light up approx. simultaneously. The driver of the car 2 stamps the brake a time alpha1 after he saw the car l brake lamp having lighted up. The car 3 does the same actions, and the car following it does the same. This allows ignoring the time for transferring of tone signal exhibiting the braked condition, and there is lesser danger of double collision.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an alarm display device mounted on a vehicle to prevent a heavy collision of two or more vehicles such as a moving vehicle.

When an automobile travels on a highway, the inter-vehicle distance tends to be narrowed when the car is crowded, and if one of the cars suddenly brakes, there is a high possibility that several rear-end collisions will occur. It can be said that traffic accidents are a major social issue, and there is growing interest in the safety of vehicles and devices that prevent traffic accidents.

[0003]

2. Description of the Related Art Generally, an automobile is designed to turn on a brake lamp by stepping on a brake. There is also provided a method of increasing safety by turning on a lamp even when decelerating by using engine braking.
However, although the brake lamp is easily visible to the car immediately behind, it is often difficult to see it in the car behind and behind, and it is not always recognized by the car behind and behind.

Therefore, the car behind can step on the brake as soon as it notices the sudden braking of the car in front, but the car behind it can turn on the brake lamp of the car immediately before it notices the brake of the car in front. Since the brake operation is performed after confirmation,
There is a problem that the later the car is, the more the brake is delayed. In particular, when the distance between vehicles is extremely narrow, or when the driver cannot recognize the front condition and the driver of the car behind the car is trying to accelerate, the braking will be further delayed.
In addition, there is a possibility that the car after that will try to accelerate, and there is a high possibility that an accident of multiple collision will occur.

FIG. 6 is an explanatory diagram of a brake operating time of a conventional vehicle during traveling. In FIG. 6, 1, 2 and 3 are vehicles running in one row, and L1 and L2 represent inter-vehicle distances.

Here, t1, t2, and t3 are the braking operation start times when the brake lamps of the cars 1, 2, and 3 are lit, respectively, and α1 is the driver of the car 2 looking at the brake lights of the car 1 and braking. Letting α2 be the time until the brake pedal is actuated by the driver of the vehicle 3 by looking at the brake lamp of the vehicle 2, the time t2 = t1 + α1 t3 = t2 + α2 is obtained. Therefore, t3 is delayed from t1 by a time of α1 + α2, and the time at which the brake operates in the nth car is generally represented by tn, and the nth car looks at the brake lamp of the immediately preceding car and depresses the brake. When the time until the brake is activated is represented by αn, tn = t1 + α1 + α2 + ... + αn, and the first car 1 brakes at time t1 and then the nth car finally brakes with a time difference of α1 + α2 + ... + αn. It becomes possible.

[0007]

In the conventional vehicle brake actuation system, when a plurality of vehicles are traveling with a short inter-vehicle distance, the driver of each vehicle sees the brake lamp of the immediately preceding vehicle. Since the brake operation is always performed, there is a delay in the operation, and the delay of this brake operation is accumulated among multiple cars for each car. Therefore, when the inter-vehicle distance is short during congestion or when driving at high speed, There has been a problem that a sudden braking operation of a car may cause multiple collisions in a pool shape.

An object of the present invention is to provide a device for preventing a heavy collision by making a vehicle behind a vehicle several hours ahead of the vehicle be in a braking state to be recognized without a time delay.

[0009]

SUMMARY OF THE INVENTION According to the present invention, a receiver is provided at the front of a vehicle such as an automobile, and a transmitter is provided at the rear of the vehicle so that a brake state signal output from the immediately preceding vehicle or the own vehicle is transmitted to the succeeding vehicle. By automatically transmitting to the following vehicle, the information indicating the braking operation of the vehicle that precedes the vehicle is promptly propagated to the following vehicle so that the braking operation of the following vehicle can be recognized early and the braking operation can be started. To do.

FIG. 1 is a diagram showing the principle of a heavy collision preventing alarm display device according to the present invention. In FIG. 1, (a) is an external view of an automobile as an example of a vehicle to which the present invention is applied, and (b) is a circuit configuration diagram. In (a) and (b), 4 is an automobile, 5 is a receiver that receives a predetermined radio signal transmitted from the rear of a vehicle traveling in front, and 6 is a traveling vehicle toward the front of a following vehicle or A transmitter for transmitting a predetermined radio wave signal indicating that the own vehicle is in the braking state, 7 is an indicator light for warning the following vehicle that the preceding vehicle or the own vehicle is in the braking state, and 8 is a receiving light Antenna, 9 is a receiver main body, 10 is an indicator light drive circuit for lighting the indicator light 7 according to a signal reception output from the receiver main body 9, 11
Is a transmitter body that operates by receiving the signal reception output from the receiver body 9 or the brake lamp signal of the vehicle itself, 12
Is an antenna that is driven by the transmitter main body 11 to transmit a predetermined radio wave signal, and 13 is a brake lamp.

The antenna 8 of the receiver 5 while the automobile 4 is running
When a millimeter wave signal having a specific frequency and further modulated with specific ID information is input, the receiver body 9 receives the radio signal and the preceding vehicle enters the braking state. It is identified that there is an indicator light drive circuit 10
To send a signal to the transmitter main body 11 to transmit a millimeter wave signal having a predetermined frequency and ID information from the antenna 12. The millimeter wave signal transmitted from the antenna 12 is further received by the receiver of a following vehicle, if any.

When the vehicle 4 itself brakes or decelerates by engine braking, the brake lamp signal is turned on, the brake lamp 13 is turned on, and at the same time the transmitter main body 11 is operated and the radio wave determined by the antenna 12 is transmitted. The signal is transmitted.

[0013]

The operation of the present invention shown in FIG. 1 will be described with reference to the example of FIG. In FIG. 2, 1, 2 and 3 are vehicles (automobiles) traveling in the same direction,
Is a receiver of each car, 6-1, 6-2, 6-3 is a transmitter of each car, 7-1, 7-2, 7-3 is an indicator light of each car, 13-
Reference numerals 1, 13-2 and 13-3 represent brake lights of each car. L-1 and L-2 are cars 1 and 2, cars 2 and 3, respectively.
Is the inter-vehicle distance between.

If the vehicle 1 suddenly presses the brake at time t1, a radio signal is transmitted from the transmitter 6-1 at the same time when the brake lamp 13-1 of the vehicle 1 is turned on, and the radio signal is transmitted to the vehicle. It is received by two receivers 5-2. The receiver 5-2 of the vehicle 2 turns on the indicator light 7-2 and at the same time causes the transmitter 6-2 to transmit a radio signal. This radio signal is received by the receiver 5-3 of the car 3, and the indicator light 7-3 of the car 3 is received.
Is turned on, and a radio signal is transmitted from the transmitter 6-3.
As a result, the brake lamp 13-1 of the car 1 and the indicator lights 7-2 and 7-3 of the cars 2 and 3 are lit almost at the same time.

The driver of the vehicle 2 is the brake lamp 1 of the vehicle 1.
After seeing that 3-1 is lit, the brake pedal is operated after the time α1 to operate the brake. In addition, the driver of the car 3 depresses the brake by seeing that the indicator light 7-2 of the car 2 is turned on, and the time t
The brake is operated after time α2 from 1. Car 3 as well
If there are cars behind, the same actions will be performed on those cars.

Since the time during which the signal indicating the braking state of the preceding vehicle propagates between vehicles is almost negligible, at the time t1 + αn when the brake is activated in any nth vehicle, the driver of the vehicle is ahead of the preceding vehicle. Depends on the individual and vehicle characteristic differences between the time it takes to depress the brake by looking at the indicator light (or the brake light of the first car in the case of the second car) and the time until the brake of the car is activated. However, the difference is slight. Therefore, the vehicle-to-vehicle distance L2 between the second vehicle and the third vehicle and the vehicle-to-vehicle distance Ln between the nth vehicle and the (n + 1) th vehicle are not greatly pinched during the braking operation, and the risk of a heavy collision is reduced. Remarkably less.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 3 is a block diagram of an apparatus according to one embodiment of the present invention. In the figure, 7 is a brake warning indicator light, 8 is a receiving antenna, 10 is an indicator light driving circuit, 12 is a transmitting antenna, 13 is a brake lamp, 14 is a millimeter wave receiving unit, and 15 is an ID identifying circuit. , 16 is a timer for blinking control, 17 is an ID addition circuit, and 18 is a millimeter wave transmission unit.

In the embodiment of FIG. 3, the millimeter wave is used as a transmission means for notifying the braking state between vehicles. Therefore, small parabolic antennas are used for the antennas 8 and 12. The ID can be added by directly modulating (keying) the millimeter wave. Antenna 8
The millimeter wave signal received at 1 is detected by the millimeter wave receiving unit 14, and the ID signal is extracted. The ID identification circuit 15 uses I
It is determined whether or not the pattern of the D signal matches the predetermined pattern, and only when they match, the timer 16 and the millimeter wave transmission unit 18 are activated.

As a result, the timer 16 generates a pulse having a constant cycle and supplies the pulse to the indicator lamp drive circuit 10, and the indicator lamp 7
Blink. Further, the millimeter wave transmitting unit 14 transmits the millimeter wave signal carrying the ID information added by the ID adding circuit 17 from the antenna 12.

On the other hand, when the brake operation is performed in the own vehicle, the brake lamp signal is input, the brake lamp 13 is turned on, and at the same time, the millimeter wave transmitting unit 18 is activated, and the millimeter wave signal is transmitted from the antenna 12. Is transmitted. In this case, the indicator lamp 7 is not turned on but the brake lamp 13
You may light it together with.

FIG. 4 shows an embodiment of the antenna in which a millimeter-wave parabolic antenna is integrally formed with a headlight for reception and a tail lamp for transmission. In this case, a parabolic reflector of a headlight or a tail lamp is used as an antenna.

By the way, the heavy collision preventing function of the present invention is as follows.
It only has to work effectively in the same lane, and when working with other lanes, it causes excessive brake operation, which hinders smooth running. FIG. 5 shows the configuration of a first embodiment device having an interference wave discrimination function for solving this problem.

In FIG. 5, reference numerals 1 and 1'denominate two vehicles that run in adjacent lanes in the same direction, and reference numeral 2 denotes a vehicle that runs behind the vehicle 1. As shown in the car 2, two receiving antennas 8a and 8b are provided in the front part of the car so as to simultaneously receive the radio wave signals transmitted from the cars 1 and 1'in front. . The signals received by the antennas 8a and 8b at the same time are input to the phase discriminating circuit 19, and only the reception signals of substantially the same phase are extracted. That is, the fact that the phase difference between the radio signals reaching the antennas 8a and 8b from the car 1'is greater than the phase difference between the radio signals reaching the antennas 8a and 8b from the car 1 Only the signal from 1 is selected.

Although the above-described embodiment has been shown to perform signal transmission using millimeter waves, other radiation signals that can have beam-like directivity, for example, radiation waves in the light wave region such as infrared rays are used. It is also possible to do so. Further, if sufficient S / N measures are taken, it is possible to use ultrasonic waves. When using light waves or ultrasonic waves, a transducer is attached instead of the antenna, and the transmitter and receiver are also changed.

Further, the antenna and the transducer can be separated from the main bodies of the transmitter and the receiver and arranged at the front and rear parts of the vehicle, and the main body of the transmitter and the receiver can be collectively arranged at an appropriate place such as inside the vehicle. . Antennas and transducers can be integrated with headlights and tail lamps,
It is also possible to have a structure integrated with the windshield and the rear glass.

[0026]

According to the present invention, by mounting the device of the present invention on each vehicle, the following vehicles can press the brakes almost at the same time, so that the possibility of multiple collisions is significantly reduced. It is possible to improve the safety when traveling during congestion and reduce the burden on the driver.

[Brief description of drawings]

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

FIG. 2 is an explanatory view of the operation of the present invention.

FIG. 3 is a configuration diagram of an apparatus according to an embodiment of the present invention.

FIG. 4 is a configuration diagram of an antenna according to an embodiment of the present invention.

FIG. 5 is a configuration diagram of an embodiment for removing an interference wave from an adjacent lane.

FIG. 6 is an explanatory diagram of a brake actuation time of a conventional running vehicle.

[Explanation of symbols]

 4 Car 5 Receiver 6 Transmitter 7 Indicator 8 Antenna 9 Receiver Main Unit 10 Indicator Light Drive Circuit 11 Transmitter Main Body 12 Antenna 13 Brake Lamp

Claims (3)

[Claims] 1. A receiver having a predetermined radiation signal receiving function is arranged on the front surface of the vehicle, and a transmitter having the predetermined radiation signal transmitting function is arranged on the rear surface of the vehicle, such as an engine brake. When performing a deceleration or braking operation, when the means for outputting the predetermined radiation signal from the transmitter and the receiver receiving the predetermined radiation signal,
A warning display device for preventing a heavy collision of a vehicle, comprising: a means for displaying a warning on a rear portion of the vehicle and causing the transmitter to output the predetermined radiation signal. 2. An antenna or transducer for receiving a specified radiation signal is arranged on the front surface of the vehicle, and an antenna or transducer for transmitting the specified radiation signal is arranged on a rear surface of the vehicle, and a receiver main body and a transmitter main body are provided. Are integrated in any part of the vehicle, and when the engine brake or other deceleration or braking operation is performed, means for outputting the determined radiation signal from the transmitter body to the transmitting antenna or transducer, When the radiation signal is input to the receiver main body from the receiving antenna or transducer, an alarm is displayed on the rear part of the vehicle and the predetermined radiation signal is output from the transmitter main body to the transmitting antenna or transducer. An alarm display device for preventing a heavy collision of a vehicle. 3. A warning display device for preventing a heavy collision of a vehicle according to claim 1 or 2, wherein a light wave such as infrared rays is used as a radiation signal.