JPH02271278A - Collision preventing apparatus of automobile - Google Patents

Abstract

PURPOSE:To prevent accidents due to collisions beforehand by providing a distance sensor, a transmission driving device and a brake driving device, and inhibiting the starting even if a driver is going to start ignoring the warning. CONSTITUTION:When a distance sensor 2 detects approaching to a body M, an approach signal is transmitted to a transmission driving device 6 and a brake driving device 7. When the transmission driving device 6 receives the approach signal, a transmission is fixed at a neutral position in overriding the driver's gear-changing operation. When the brake driving device 7 receives the approach signal, the brake is applied. Even if the driver pushes an accelerator, the automobile is not started. Therefore, even if the driver is going to start without noticing the body located at a very close distance or ignoring warning, collision can be prevented.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention prevents accidents caused by collisions by preventing the vehicle from starting when there is an object within close range of the vehicle. This invention relates to collision prevention devices for automobiles.

[Conventional technology]

FIG. 3 is a block diagram showing a conventional collision prevention device disclosed in, for example, Japanese Patent Publication No. 63-41120.
is a vehicle body, and 2 is a distance sensor that detects when an object M approaches a detection area within a certain distance from the vehicle body 1.

This distance sensor 2 is attached to the rear part of the vehicle body 1, and is designed to detect the approach of an object M from behind.

An alarm means 3 is activated when an object detection signal is output from the distance sensor 2.

4 is a transmission 5 that sets the gear ratio.
This is a detection area switching means that switches the detection area in conjunction with the operation of It looks like this.

Additionally, when the transmission 5 is operated to neutral or forward, the detection area is set at a relatively long distance to detect the approach of a following vehicle, ensuring appropriate collision prevention at all times depending on the driving situation. A warning is now being issued.

Three types of detection areas are set at each operating position of the transmission 5, and the alarm means 3 issues an alarm corresponding to each detection area.

Next, the operation will be explained. Now, when the transmission 5 is operated to the neutral or forward position, the detection area switching means 4 changes to the relatively long path R (2
Set the detection area to 0m-0,5m) and distance sensor 2
From there, ultrasonic pulses are emitted at a constant period to the object M behind in synchronization with a relatively long-period reference pulse.

The ultrasonic pulse reflected from this object M is transmitted to the distance sensor 2.
The object detection signal is obtained by receiving and detecting the wave. This detection consists of a direct reflected wave from the object M and a pulsed wave that is directly received by the receiver, so this detection is performed in order to separate them and obtain the reflected pulsed wave from the object M.

This detected pulse wave is outputted from the distance sensor 2 to the alarm means 3 as an object detection signal. As a result, the alarm means 3 is activated, and the object M is detected at a relatively long distance (20 m to 0.0 m).
．． A warning is issued with a volume or tone indicating that the object is within 5 m).

Further, when the transmission 5 is operated to the reverse side, the detection area switching means 4 is set to a relatively short distance MC (2 m to 0.5 m) in conjunction with this, and the distance sensor 2 is operated in the same manner as above. Ultrasonic pulses are emitted to the rear object M at a constant cycle in synchronization with a relatively short-cycle reference pulse.

The ultrasonic pulse reflected from the object M is delivered and detected in the same manner as described above, and is output from the distance sensor 2 to the alarm means 3 as an object detection signal.

As a result, the alarm means 3 issues an alarm with a volume or tone indicating that the object M is within the range of 2 m - 0.5 m.

[Problem to be solved by the invention]

Conventional collision prevention systems for automobiles are configured as described above, so even if an appropriate warning is issued, the object M
There is a problem in that if the driver ignores or starts driving without noticing when the vehicle is in close range, a collision may occur.

This invention was made to solve the above-mentioned problems, and when an object is close to the car,
To provide a collision prevention device for an automobile capable of preventing an accident due to a collision by preventing the driver from starting even if the driver ignores a warning and tries to start.

[Means to solve the problem]

A collision prevention device for a vehicle according to the present invention includes a distance sensor that is attached to a vehicle and detects when an object approaches a detection area within a certain distance from the vehicle, and a vehicle that is operated while receiving a signal from the distance sensor. The vehicle is equipped with a brake drive device and a transmission drive device that function to prevent the vehicle from starting even if a person tries to start the vehicle.

[For production]

When the distance sensor in this invention detects the approach of an object, it sends an approach signal to the transmission drive device and the brake drive device, and when the transmissicon drive device receives the approach signal, it prioritizes the transmission over the driver's gear operation. The vehicle is fixed in neutral, and when the brake drive device receives an approach signal, it applies the brakes, preventing the vehicle from starting even if the driver steps on the accelerator, thereby preventing a collision.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of a collision prevention device for an automobile according to the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing the configuration of one embodiment. .

In FIG. 1, numbers 1 to 5 are the same as those in the conventional example shown in FIG. 3, so their explanations will be omitted. The parts indicated by reference numeral 6 and after are newly added parts in FIG.

That is, 6 is a transmission drive device that receives a signal from the distance sensor 2 and drives the transmission and siran 5;
is a brake drive device that receives signals from the distance sensor 2 and drives the brakes 8 of the automobile.

FIG. 2 is a detailed circuit diagram illustrating the common parts of the transmitter drive bag M6 and the brake drive device 7 as a shared circuit, and the actual device is constructed in this way.

In this FIG. 2, from the distance sensor 2 in FIG.
The approach signal (logical rlJ in the close state, logic "0" is the digital signal in the non-proximal state) is the AND gate 10
It is designed to be manually inputted to the first input terminal of 3. The second input terminal of this computer game) 1.03 is connected to the vehicle speed sensor 1.
The output of 02 is input.

The vehicle speed sensor 101 is configured to send an AC signal having a frequency corresponding to the vehicle speed to the vehicle speed detection circuit 102 while the vehicle is running.

This vehicle speed detection circuit 102 has a logic of "0" when it is not OH2.
", and when the frequency is OHZ, a logic "1" is output.

Furthermore, the output terminal of the AND gate 103 is connected to the bases of transistors 106 and 107 through base current limiting resistors 104 and 105, respectively.The emitters of the transistors 106 and 107 are grounded, and the collectors are connected to the bases of each It is connected to the bases of power transistors 112 and 113 via current limiting resistors 108 and 110.

Bleeder resistors 109 and 111 are inserted between the base collectors of the power transistors 112 and 113, respectively, and both power transistors 112 and 113
The collectors of the power transistors 112 and 113 are connected to the battery 116, and the collectors of the power transistors 113 are grounded via solenoids 114 and 115.

Next, the operation will be explained. The operations 1 to 5 in FIG. 1 are the same as those in the conventional example shown in FIG. 3, and will therefore be omitted. When the distance between the object M and the vehicle is greater than a predetermined distance, only the warning means 3 is activated and an appropriate warning is issued to the driver.

However, when the object M approaches within this certain distance, the brake drive device 7 shown in FIG. 2 operates to apply the brake 8, and furthermore, the transmission drive device 6
operates and puts the transmission 5 in neutral.

Next, referring to FIG. 2, the operations of the transmission drive device 6 and brake drive device 7 will be explained.

The approach signal of object M from distance sensor 2 is AND gate lO
Here, it is a digital signal that is logic "1" when in the approach state and logic "0" when it is in the non-approach state.

Furthermore, as already mentioned, while the vehicle is running, an AC signal with a frequency corresponding to the vehicle speed is sent from the vehicle speed sensor 101 to the vehicle speed detection circuit 102, but when the vehicle speed signal is not OHZ, the vehicle speed detection circuit 102 outputs a logic "0" signal when the vehicle speed signal is not OHZ. ” and outputs OHZ
When this happens, a logic "1" is output.

Now, approach signal and vehicle speed detection circuit 1 are detected by AND gate 103.
By taking the AND with the output of 02, the output can always be logical 0 when the car is running, and if the brakes are suddenly applied due to the approaching signal of the object M while the car is running or the car goes into neutral. You can prevent the danger of entering.

When the approach signal is "1" and the output of the vehicle speed detection circuit 102 is "1" (while stopped), the output of the AND gate 103 is "1", and the base current limiting resistor 104.
Through 105, transistors 106 and 107 can be turned on.

When both transistors 106 and 107 are turned on, the base current limiting resistors 108 and 110 and the bleeder resistor 10
9,111, power transistors 112. IL
3 can be turned on.

The power transistors 112 and 113 each have their emitters connected to a battery 116, and their collectors connected to a brake driving solenoid 114 and a transmission driving solenoid 115.

Therefore, when power transistors 112 and 113 are turned on, current flows from battery 116 to solenoids 114 and 115, causing both solenoids 114 and 115 to operate, applying the brakes and at the same time transmitting 5
enters neutral.

In this way, when the object M is within a certain distance, the transmission drive device 6 operates to fix the transmission in neutral, and at the same time the brake drive device 7 operates to apply the brakes 8. Even if you press the accelerator, the car will not start,
Collisions can be prevented.

Note that while the automobile is running, the transmission drive device 6 and the brake drive device 7 can be operated so that the i-function that makes it impossible to start the automobile is not activated.

〔Effect of the invention〕

As described above, according to the present invention, the distance sensor detects that an object approaches the detection area within a certain distance from the car, and the transmission drive device operates in response to the signal from the distance sensor to neutralize the transmission. Since the brake drive device applies the brakes at the same time as the vehicle is fixed to the vehicle, it is possible to prevent collisions even if the driver tries to start driving without noticing an object in close range or ignoring the warning. It has a huge safety effect.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing a collision prevention device for an automobile according to an embodiment of the present invention, FIG. 2 is a circuit diagram showing the detailed configuration of a transmission drive device and a brake drive device in the same embodiment, and FIG. 3 is a conventional one. FIG. 2 is a block diagram of a collision prevention device for an automobile. DESCRIPTION OF SYMBOLS 1... Vehicle body, 2... Distance sensor, 3... Alarm means, 4... Detection area sensor, 5... Transmission, 6... Transmission drive device, 7...
Brake drive device, 8...brake, M...object. In addition, in the figures, the same reference numerals indicate the same or equivalent parts. Agent Masuo Oiwa Figure 1 Figure 2 Figure 3 Procedure amendment (voluntary)

Claims (1)

[Claims] A distance sensor that is attached to a car and detects when an object approaches a detection area within a certain distance from the car, and a transmission drive device that fixes the transmission in neutral so that the car cannot start when it receives an output signal from the distance sensor. and a brake drive device that drives the brakes when receiving an output signal from the distance sensor.