JP2001153951A - Crush predictor for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a collision accident by detecting missing of road mark, deviation from a passing zone, violation of an alarm regulation line, or violation of inter-vehicle distance due to drive asleep or inattentive drive and notifying a crew of this effect. SOLUTION: Reflection tupe regressive infrared sensors 2, 3, 4, 5 secured at front/rear and left/right corners of a vehicle 1 while directing directly downward captures variation of a light beam reflected on the reflective material 7 of a road mark 6 to deliver a signal. The signal is passed through a controller 8 and a crew is notified of the fact fro a predetermined time through buzzer, a lamp 9, or the like. An infrared sensor 11 secured to a front part of the vehicle 1 detects infrared rays emitted from an infrared projector 10 secured to a rear part of a preceding vehicle 10 thus detecting the inter-vehicle distance and starting brake operation.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention detects an oversight of a road sign, an overrun from a traffic lane, a crossing of a caution control line, and a lack of inter-vehicle distance due to drowsiness or inattentive driving, and informs an occupant of a collision accident. The present invention relates to a vehicle collision prediction device that attempts to prevent the occurrence of a collision.

[0002]

2. Description of the Related Art In a conventional vehicle collision prediction system, the distance between vehicles and obstacles at the front, rear, left and right is utilized by utilizing the arrival area of radio electromagnetic waves or by utilizing the reflection and depth of focus of ultrasonic waves and infrared rays. There is a known means such as a device that detects an alarm and issues an alarm, a video recognition device, and the like. As a device to detect obstacles directly below the road surface or vehicle, a device that detects a child, etc., who dives under a parked and stopped vehicle by arranging a light emitting / receiving infrared sensor in the lateral direction so as to surround the underside of the vehicle from all sides. There is. (For example, see Japanese Patent Publication No. 2594502).

[0003]

SUMMARY OF THE INVENTION Among the methods described in the prior art, a method for detecting obstacles at the front, rear, left and right of a vehicle, including the Japanese Patent Publication No. 2594502, and the inter-vehicle distance from a lateral direction. Not only weather conditions such as noise generated from vehicles and wind, temperature difference, etc., but also the shape and size, material, color and reflectivity of obstacles, the distance direction changes delicately and vehicles that are moving backwards There are difficulties such as contacting obstacles without knowing the exact position and height difference, but not knowing the exact direction and height difference, but not knowing the roadside marking on the road surface, crossing the sign, getting off the wheel in the ditch, or getting on the sidewalk. In some places where there is no guardrail or the like on the side, there is a problem that the vehicle falls down from the shoulder of the road. In addition, when starting / retreating, the vehicle may become a blind spot.
Signs for road construction and traffic accident handling, etc., had no means other than visual inspection, and if they were overlooked, there was a great risk of leading to a serious accident. Furthermore, they often could not grasp the distance between vehicles that matched the running speed, and often did not notice the braking of the preceding vehicle and collided.

The present invention has been made in view of the above-mentioned problems of the prior art, and has as its object to accurately detect the position and type of a road marking on a road surface. In addition, an appropriate inter-vehicle distance is detected to notify the occupant of an overlooked road sign or an abnormal approach to the preceding vehicle caused by falling asleep or looking aside at an early stage, thereby prompting the occupant to correct the trajectory to prevent a collision accident. .

[0005]

In order to achieve the above object, a vehicular collision prediction apparatus according to the present invention comprises a reflection regression-type infrared sensor
・ Reflective material 7 even when 3 ・ 4 ・ 5 is fixed and directed directly below
It can be detected several cm before the entrance road sign 6.

[0006] Reflection regression type infrared sensor 2, 3, 4, 5
The sensitivity is adjusted so that a signal can be stably emitted when the infrared rays emitted from the camera return by the reflective material 7 such as glass beads laid on the surface of the road sign 6. For example, the height of the infrared sensor is about 45 cm from the road surface, and the bumper is installed at an angle of several degrees toward the outside as necessary.

Which reflection regression type infrared sensor 2.3.4.
-An individual buzzer, lamp 9 or the like is displayed so that it is possible to specify whether or not 5 has been detected.

In order to accurately detect the position, direction, and type of the road sign 6, for example, as shown in FIG. 4, when the vehicle travels in parallel with the roadside sign, the reflective material 7 laid in a bar code by the infrared sensor 2 is used. The road sign 6 is detected and converted into a sound by the control device 8 to notify the occupant.

[0009] If necessary, the control unit 8 selectively controls necessary signals by classifying them into an expressway, a general road, a forward travel, a reverse travel, and the like.

The reflection regression type infrared sensors 2, 3, 4, 5 to be mounted on the vehicle 1 as required are integrated with a marker pole having a lamp 9 fixed to the tip.

A buzzer or lamp 9 used as a means for transmitting an alarm to an occupant may be provided with an electrode of a low-frequency therapeutic electronic pad used for vibration or massage of a speaker handle or the like, as necessary, on a part of the body. Use a secure method such as fixing.

In order to avoid a rear-end collision, an infrared projector 10 that can be sensed from a position about 100 m behind the vehicle 1 is fixed as shown in FIG. In this case, it is preferable to set the light projection angle to 10 ° or less in order not to issue a warning to the overtaking vehicle.

As shown in FIG. 4, an infrared ray emitted from an infrared ray projector 10 fixed to the vehicle 1 can be detected from a position about 100 m away from the vehicle so as to avoid a collision with a vehicle traveling or stopping ahead. The sensor 11 is fixed to the front part of the vehicle 1. In this case, it is preferable to provide a hood so as not to receive direct sunlight or other light.

[Action]

A description will be given based on an embodiment of the present invention with reference to the drawings. 1 to 4, when using the vehicle collision prediction device of the present invention, it is assumed that each of them is fixed as described above.

The infrared rays emitted from the reflection regression type infrared sensors 2, 3, 4, and 5 fixed at a position of about 45 cm in height of the vehicle 1 emit the infrared rays when the road sign 6 and the reflection material 7 are not laid. Reflection regression type infrared sensor 2,3,4,5 without absorbing or diffusely reflecting on asphalt etc.
Does not work. However, even in this case, the height of the sidewalk is about 20c.
When an obstacle around m enters below the infrared sensor, a warning is issued because it becomes a sensing area.

In a place where the reflective material 7 is laid on the road sign 6, glass beads or the like, which is a spherical reflective material, serves as a lens and reflects infrared light in the incident direction to a height of about 50 to 70 cm. For this purpose, the reflection regression type infrared sensors 2, 3, 4, and 5 are operated, and it is possible to check which sensor has been operated by the buzzer or the lamp 9 via the control device 8.

In this case, the road marking marked on the surface of the asphalt or the like in the form of a bar code by the road marking 6 containing the reflective material 7 is converted to the infrared sensor 2 by the running of the vehicle 1.
For example, it is possible to provide voice guidance via the control device 8 as "the maximum speed limit is 40 km / h".

To avoid a rear-end collision with a vehicle ahead, FIG.
As shown, the infrared projector 10 fixed to the rear of the vehicle 1
The infrared sensor 11 detects the infrared rays from the camera and can be confirmed by a buzzer or a lamp 9 via the control device 8. At this time, the sensing distance of the sensor is about 100 m. In order to reduce unnecessary information on a general road, if necessary, the infrared projector 10 can emit light only during braking.

An infrared sensor 1 fixed to the front of the vehicle 1
1 allows the infrared sensing distance from the infrared projector 10 to be switchable from about 100 m to about 50 m by mode switching, so that the mode can be used by switching between highway and ordinary road modes.

【Example】

On an expressway, a distance between vehicles of about 100 m or more is required to prevent rear-end collision at a speed of about 100 km / h. If the distance becomes less than about 100 km / h, the infrared sensor 11 detects and outputs a buzzer or a lamp 9 through the control device 8. Signal the danger by: Or, when the reflection regression type infrared sensors 2.3 come on the road sign 6, the infrared ray returns by the reflection material 7, the reflection regression type infrared sensors 2.3 operate, and the buzzer or the lamp 9 is dangerous through the control device 8. To inform.

While following the front vehicle at approximately 50 km / h on a general road, when the front vehicle brakes and the inter-vehicle distance becomes approximately 50 m or less, the infrared sensor 11 detects and outputs a buzzer or lamp 9 via the control device 8. Signal the danger by: Or, when the reflection regression type infrared sensors 2.3 come on the road sign 6, the infrared ray returns by the reflection material 7, the reflection regression type infrared sensors 2.3 operate, and the buzzer and the lamp 9 are dangerous through the control device 8. To inform. For this purpose, it is preferable to set the projection angle to 10 ° or less in order to detect infrared rays farther and to avoid receiving light from passing vehicles.

In this case, as shown in the reflection regression type infrared sensor 2 in FIG.
Is fixed, the reflection material 7 on the road surface at that position is fixed.
The presence or absence of the laid road sign 6 can be confirmed.

When the vehicle is moved backward, when the shift lever is put in reverse, the outputs of the reflection regression type infrared sensors 4 and 5 are taken into the control device 8 so that the rear end comes on the road sign 6 such as a parking lot. At this time, the reflection regression-type infrared sensors 4 and 5 detect the reflection of the reflection material 7 to notify and avoid contact with an obstacle. In this case, the height is about 20cm as well as the front
The above obstacles can also be detected.

A road marking 6 such as a stop line perpendicular to the traveling direction of the vehicle 1 is indicated by a reflection regression type infrared sensor 2, 3,.
Since the sensing is performed by any one of the methods 4 and 5, it is also operated by the reflective material 7 of the temporary road sign 6 provided for road construction or traffic accident processing, and the presence thereof can be notified to the occupant.

The same infrared ray as the infrared projector 10 of the vehicle 1 is provided together with a lane change guidance road sign 6 provided in front of the accident location, for example, from a variable road sign pole or the like beside the road.
By firing in the direction in which the vehicle 1 is traveling, when the vehicle 1 equipped with the infrared sensor 11 approaches, the vehicle 1 can be notified of the danger approach.

Since the present invention is configured as described above, it has the following effects.

Road sign 6 The existing reflective material 7 can be used, and the bar code-shaped road sign 6 indicating the type is also easy to construct and excellent in design. No laying of a loop antenna or the like is required, and it is hardly affected by radio interference, weather conditions, and the like.

The vehicle 1 is displayed on a road sign 6 at the time of starting or a roadside zone.
It is possible to notify the occupant at an early point when a part of the vehicle has arrived to avoid danger.

Combined with an infrared projector mounted on a pole or a separate infrared sensor mounted on the vehicle, the information is promptly reported to the occupant and the vehicle 1
Rear collision can be avoided.

By integrating the reflection regression type infrared sensor 2 with the marker pole and the lamp 9, the road marking 6
And the position of the vehicle 1 can be confirmed as the same position.

Since the end of the vehicle 1 on the road sign 6 can be confirmed, for example, when the vehicle retreats, the vehicle can be securely parked in the section and avoid contact with an adjacent vehicle or an obstacle. Even a barricade or a pole having a low height, which has been considered to be difficult to confirm in the blind spot, can be avoided by demarcating the road sign 6 with the reflective material 7.

The location of frequent occurrences of traffic accidents, danger spots, places of occurrence of heavy fog, vehicles under road construction, traffic accident handling, breakdowns, etc., are indicated by temporary reflective road markings 6 in front of the corresponding site on one side only. Alerts passengers who overlook signs and road signs with buzzers and ramps,
The safety of field workers can be protected.

By providing the control device 8 with a holding function or combining it with a wireless automatic notification device, it is possible to detect theft or movement of a vehicle, diving under a vehicle, and the like.

[Brief description of the drawings]

FIG. 1 is a perspective view of a vehicle collision prediction device mounted on a vehicle.

FIG. 2 is a cross-sectional perspective view of a main part in which the vehicle collision prediction device is mounted on a vehicle.

FIG. 3 is a perspective view of a main part showing a mounted state of a reflection regression type infrared sensor of the vehicle collision prediction device.

FIG. 4 is a perspective view of a main part showing a mounting state of an individual infrared sensor for transmitting and receiving light of the collision prediction device for a vehicle.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Vehicle 2, 3, 4, 5 Reflection regression type infrared sensor 6 Road sign 7 Reflective material 8 Control device 9 Buzzer or lamp 10 Infrared light emitter 11 Infrared sensor

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Claims (2)

[Claims] 1. A reflection regression type infrared sensor (2, 3, 4, 5) is fixed downwardly in front, rear, left and right corners of a vehicle (1), reflected on a reflection material (7) of a road sign (6) to detect a change in light flux and to receive light. A collision predicting device for a vehicle, which emits a signal and notifies the occupant by a buzzer or a lamp 9 or a substitute for the buzzer or a lamp 9 for a predetermined time via a control device 8. 2. An infrared sensor 11 fixed to the front of the vehicle 1 receives infrared light from an infrared projector 10 fixed to the rear of the vehicle 1, which is the vehicle on the other side, and receives the infrared light. A vehicular collision prediction device according to claim 1, wherein the buzzer or the lamp (9) according to claim 1 or an alternative is notified to an occupant.