JPS58225376A - Apparatus for preventing rear-end collision of vehicle - Google Patents

Abstract

PURPOSE:To prevent the rear-end collision of a vehicle even if the fatigue of a driver is severe, by outputting a signal corresponding to the distance between an object to be detected and the vehicle by an infrared detecting output value from the object to be detected positioned in front of the vehicle. CONSTITUTION:An infrared detector 2 having a calibration curve I wherein the output value of infrared rays issued from an object 8 to be detected at a predetermined temp. is expressed as a value shown corresponding to the distance with the detector 2 mounted therein and outputs a signal corresponding to the distance between a vahicle and the object 8 to be detected by the detected infrared output value. A display alarm apparatus 3 lights a lamp informing that other vehicle appears in front of own vehicle when receives the predetermined output signal from an operator 4 and, when the distance therebetween is brought into a predetermined value, an alarm is emitted. In this situation, a brake mechanism 7 controls the speed of the vehicle and operated in a state controlled by an operation detector 6 and the operator 4.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rear collision prevention device for a vehicle using an infrared detector.

2. Description of the Related Art Conventionally, when driving a vehicle such as an automobile, safety has been ensured by the driver's visual confirmation of the road ahead. For this reason, if the driver becomes very fatigued or is inattentive, such as falling asleep or looking aside, there is a problem that rear-end collisions may occur. Also,
When visibility in front of the vehicle is poor, such as at night, there is a problem that safe driving cannot be guaranteed.

The present invention has been made with this point in mind.

Even when the driver is highly fatigued or careless, such as looking aside, TFT provides a device to prevent rear-end collisions of the vehicle by allowing the vehicle to drive safely even when visibility is poor such as at night. Hereinafter, one embodiment of the present invention will be explained with reference to the drawings.

FIG. 1 shows an example of a vehicle to which a vehicle rear-end collision prevention device according to the present invention is applied. In the figure, 1 is the vehicle body. An infrared detector 2 is provided at the front portion of the vehicle body 1 along the traveling direction. The operation section of the vehicle body 1 has a display and
An alarm device 3 is provided. Between the infrared detector 2 and the display/alarm device 3, a computing unit 4 consisting of a microcomputer, a microcomputer, etc. is provided. These instruments 2, 3.4 are electrically connected as shown in FIG. That is, a predetermined output signal is supplied from the infrared detector 2 to the arithmetic unit 4, and a predetermined output signal is further supplied from the arithmetic unit 4 to the display/alarm device 3. 1. Predetermined output signals are supplied to the arithmetic unit 4 from the speed detector 6 and motion detector 6 of the vehicle. The motion detector 6 is a device that detects the operating state of the braking mechanism 7 that controls the running speed of the vehicle. This braking mechanism 7 is supplied with a predetermined output signal from the computing unit 4.

Here, the infrared detector 2 detects infrared rays emitted from the detected object 8 located in front of the vehicle, and outputs a good signal according to the distance between the vehicle and the detected object 8 based on the detection output value of the infrared ray. It is designed to be output. As shown in FIG. 3, the infrared detector 2 has an output value of infrared rays emitted from the object 8 at a predetermined temperature depending on the distance from the infrared detector 2. It has a built-in calibration lineman, and outputs a signal according to the distance between the vehicle and the object to be detected 8t based on the output value of the detected infrared rays. Therefore, the basis of this calibration curve ■ is the detected object K, 8
The heat source may be, for example, the exhaust gas of a vehicle traveling in front, or a human body with a predetermined body temperature walking in front of the vehicle.In short, it may be anything that has a predetermined temperature and emits infrared rays. Also, when the display self-warning device 3 receives a predetermined output signal from the calculator 4, it lights up a rung to notify that another vehicle has appeared in front of the vehicle.

When the distance between the detected object 8 such as a vehicle and the vehicle falls within a predetermined value, a buzzer sound is emitted as a warning. In addition, when the display/warning device 3 emits a buzzer sound, the braking mechanism r controls the speed of the vehicle and operates the motion detector 6 and the arithmetic unit until the distance to the detected object 8 reaches a safe value. It operates under the control of 4. Note that the value of the safe distance between the vehicle and the detected object 8, the control conditions for the braking mechanism 7, etc. are input into the calculator 4 in advance.

According to the vehicle rear-end collision prevention device 10 configured in this manner, the detected object 8 appearing in front of the vehicle can be detected regardless of the driver's fatigue level, attentiveness, or the environment in which the vehicle is traveling. At the same time, the car, II. There was a rear-end collision in the distance! As a result, the vehicle can be driven safely regardless of day or night, and even if someone jumps out in front of the vehicle, the state of the vehicle can be controlled by processing electrical signals using infrared rays. It is possible to quickly detect this and perform the necessary driving control, thereby sufficiently increasing driving safety.

As explained above, according to the rear-end collision prevention device for a vehicle according to the present invention, the vehicle can be driven safely even when the driver is highly fatigued or inattentive, or when visibility is impaired such as at night. This has remarkable effects, such as the ability to

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing the structure of a vehicle to which a vehicle rear-end collision prevention device according to the present invention is applied, and FIG. FIG. 3, which is a block diagram showing the configuration of the rear-end collision prevention device of the same vehicle, is a characteristic diagram showing the relationship between the output value of infrared rays and the distance to the detected object. DESCRIPTION OF SYMBOLS 1... Vehicle body, 2... Infrared detector, 3... Display/alarm device, 4... Arithmetic unit, 6... Speed detector, 6
... Motion detector, 7... Braking mechanism, 8... Object to be detected.

Claims (1)

[Claims] an infrared detector attached to a vehicle body, a speed detector provided to the vehicle body, a braking mechanism for controlling the running operation of the vehicle, a motion detector for detecting the operating state of the braking mechanism; A rear-end collision prevention device for a vehicle, comprising: a computing unit to which the outputs of a motion detector, the infrared detector, and the speed detector are supplied, and which supplies a predetermined output to the braking mechanism.