JP2008242579A - Vehicle approach warning device - Google Patents

Abstract

An object of the present invention is to provide a vehicle approach warning device that can warn of approach of a vehicle while adopting a simple configuration without requiring large-scale environmental infrastructure maintenance, and prior to visual observation of other vehicles. To detect and alert the driver early.
An oblique irradiation infrared light source and an infrared signal receiving unit are provided inside a vehicle headlamp and the like, and an irradiation width angle of 10 to 40 degrees toward a licking direction of 45 degrees toward the front of the vehicle. Send infrared signal. The infrared signal receiving unit is connected to a received signal processing means for receiving and determining a signal transmitted from the oblique irradiation infrared light source of another vehicle. A vehicle approach alarm device including an approach recognizing means for analyzing a received signal and recognizing an approaching state of another vehicle and a warning means for giving a warning to a driver is provided in the host vehicle and other vehicles. When the vehicle and other vehicles enter the intersection, both vehicles perform vehicle-to-vehicle communication in front of the intersection, detect the presence of the other vehicle earlier than the detection of the other vehicle by visual inspection, and issue a warning to the driver. .
[Selection] Figure 6

Description

  The present invention relates to an inexpensive vehicle approach warning device that can quickly check the presence or absence of an oncoming vehicle at an intersection or a road with a large curvature to prevent a collision at a vehicle intersection or the like.

  Automobile accidents often occur in places with poor visibility such as intersections, T-junctions, and sharp corner curves. In such places, traffic lights, corner mirrors, etc. are often installed, but there are places where installation is difficult due to problems such as cost and location problems and obstructing smooth running. Therefore, it is not necessarily an effective means at all intersections and T-junctions. Therefore, development of an approach warning device for further collision prevention has been actively promoted in recent years.

  For example, as a conventional collision prevention device, a base point marker is installed near the intersection, and the distance of the vehicle to the intersection, the distance of other companies, etc. by exchanging signals between the vehicle traveling to the intersection and the base point marker A device for grasping and preventing a head-on collision has been proposed (see, for example, Patent Document 1).

In factories and the like, parts and finished products are transferred using self-propelled vehicles that automatically run. Such a self-propelled vehicle, for example, travels according to the guideline while detecting the guideline embedded in the runway. The guideline connects multiple departments on the production line, and there are many paths that cross each other. Since there are cases where a plurality of self-propelled vehicles enter the intersections where the guidelines cross or merge with each other at almost the same time, it is necessary to take measures to prevent a collision. As such a collision prevention measure, for example, an infrared signal indicating a rank number given to the own vehicle is transmitted to the other vehicle toward the intersection where each other's vehicle is in front of the intersection of the runway, and the rank of the own vehicle There has been proposed a collision prevention method for a vehicle in which the own vehicle is restarted after waiting for an intersection of another vehicle having a higher priority from the number and another company's rank number (see Patent Document 2).
JP 2002-163788 A JP 2000-3500 A

However, the method of providing the base marker described in Patent Document 1 requires a maintenance of the infrastructure environment, and there is a problem that it takes a great deal of cost to install at all intersections.
In addition, the method described in Patent Document 2 does not require the maintenance of environmental infrastructure as in Patent Document 1, but in this method, it is necessary to communicate the rank numbers with each other. Since it is difficult to discriminate, it is difficult to effectively prevent collisions.

  The present invention has been made in view of such a background, and is a vehicle approach alarm that can warn of the approach of a vehicle while adopting a simple configuration at a low equipment cost without performing environmental infrastructure maintenance. An object is to provide an apparatus.

  For this reason, the above object is to provide the first oblique irradiation infrared light source and the first infrared signal receiving unit provided at the left front part of the vehicle, the second oblique irradiation infrared light source and the second provided at the right front part of the vehicle. A vehicle approach warning device comprising an infrared signal receiving unit, an infrared signal processing means for processing a received infrared signal, and a warning means for giving a warning based on a result of the infrared signal processing means, The first oblique irradiation infrared light source emits an infrared signal at an irradiation width angle of 10 to 40 degrees toward the right side 45 degrees toward the front of the vehicle, and the second oblique irradiation infrared light source is Infrared signals are transmitted at a wavelength or modulation different from that of the first oblique irradiation invisible light source at an irradiation width angle of 10 to 40 degrees toward the licking direction on the left side 45 degrees toward the vehicle forward direction, and the first The infrared signal receiver is the second diagonal of other vehicles Connected to a first received signal processing means for receiving and determining a signal transmitted from the infrared light source, the second infrared signal receiver receives a signal transmitted from the first obliquely irradiated infrared light source of another vehicle. Access recognition means connected to second reception signal processing means for determining reception, analyzing the reception signals of the first reception signal processing means and / or the second reception signal processing means and recognizing the approaching state of another vehicle; This is solved by a vehicle approach warning device comprising warning means for warning the driver based on a signal from the approach recognition means.

  According to this configuration, for example, a vehicle and an oncoming vehicle that are about to enter an intersection that is an intersection of a running road are traveling by sending infrared signals in an oblique direction. Therefore, even if there is an obstacle such as a house near the intersection, the vehicle that is about to enter the intersection is provided in front of the vehicle, especially on the right side of the vehicle (the left side in the case of right-hand traffic). With the infrared light source and the receiving unit, it is possible to quickly recognize the presence of the oncoming vehicle with a relatively simple and inexpensive configuration, and to promptly know the approaching state of the oncoming vehicle.

Preferably, the approach recognition means further compares the signal amounts of the first reception signal processing means and the second reception signal processing means, and the approach of the other vehicle is either from the left side, the right side or the front side. This is solved by a vehicle approach warning device, characterized in that an approach discrimination means for discriminating between the two is provided.
According to this configuration, by comparing the first and second received signals, for example, at the intersection of the runway, it is possible to quickly recognize from which direction the other vehicle approaches from the left side or the right side. The vehicle approach can be warned.

Preferably, the approach recognition means includes means for obtaining an increase amount or an increase rate of the signal intensity per unit time of the reception signal of the first reception signal processing means and / or the second reception signal processing means. This is solved by a vehicle approach warning device.
According to this configuration, since the signal intensity transmitted from the approaching other vehicle is analyzed, the degree of approach of the other vehicle can be known at an early stage, and a more accurate warning can be performed.

Preferably, the first oblique irradiation infrared light source and the second oblique irradiation infrared light source include a lamp body of a vehicle headlamp so that a main optic axis is a 45 ° tanning direction with respect to the vehicle front direction. This is solved by a vehicle approach warning device, which is an infrared light emitting diode light source installed in the vehicle.
According to this structure, it can attach to a vehicle easily, without attaching separately to a vehicle, and can achieve size reduction.

Preferably, the vehicle headlamp is a variable light distribution headlamp including a light source capable of moving an irradiation direction according to a traveling direction of the vehicle, the first oblique irradiation infrared light source and the second light source. The oblique irradiation infrared light source is connected to a driving means for moving the irradiation direction in cooperation with the light source to which the variable light distribution headlamp moves, and is solved by a vehicle approach warning device, .
According to this structure, it can attach to a vehicle easily, without attaching separately to a vehicle, and can achieve size reduction.

  According to the vehicle approach warning device of claim 1, an infrared signal is transmitted toward another vehicle in a place with a poor visibility such as an intersection of a runway, and an infrared signal is received from another vehicle. The approach of another vehicle can be predicted based on the received infrared signal. As a result, it is possible to warn of the approach of a vehicle with only a simple configuration provided in the vehicle without preparing an infrastructure environment such as providing a complicated control device on the runway side, thereby contributing to prevention of a collision. Can be.

Further, since the infrared light source and the infrared signal receiver are provided on the right front and left front in the front direction of the vehicle, the malfunction can be suppressed by recognizing only when the vehicle is within a predetermined range. . Since infrared rays are emitted toward the front oblique direction, it is possible to quickly recognize a vehicle approaching from the lateral direction at an intersection with poor visibility due to an obstacle or the like. Since the first oblique irradiation infrared light source and the second oblique irradiation infrared light source transmit infrared signals with different wavelengths or modulations, the vehicle approaching by analyzing the received signal is on the right side or the left side. It can be easily discriminated.
Further, since the first oblique irradiation infrared light source and the second oblique irradiation infrared light source are provided at the left front portion and the right front portion of the vehicle, the infrared signals transmitted from the light sources intersect at the front of the vehicle. proceed. Therefore, at the intersection of the traveling road of the traveling vehicle, infrared rays are transmitted from the outer corner side of the intersection farthest from the obstacle existing on the inner corner side of the intersection, that is, from the position near the center of the traveling vehicle intersection. Even when an obstacle or the like is present at the inner corner of the intersection, it is possible to notify the other vehicle of the approach at an early stage.

  According to the vehicle approach warning device of the second aspect, the approach determining means can easily determine whether the approach of another vehicle is from the left side, the right side or the front side by a relatively simple means. obtain.

  According to the vehicle approach warning device of the third aspect, it is possible to know the approaching state of the other vehicle by a relatively simple means that only uses the change amount of the received signal. Therefore, it is possible to know the approaching state of the other vehicle with higher accuracy and to give a more accurate warning.

  According to the vehicle approach warning device of the fourth aspect, the infrared light source can be installed by mounting the vehicle headlamp without providing a new mounting structure on the vehicle body. The interior of the vehicle headlamp is attached to the front end side of the vehicle. Therefore, the infrared light source unit and the light receiving unit can be easily provided in the vicinity of the position where the vehicle-to-vehicle communication can be performed farther to the farthest outermost side at the corner or the like, and other vehicles can be recognized earlier. In addition, even when a reflector structure similar to the reflector structure provided in the vehicle headlamp is provided in the infrared light source, it can be attached to the vehicle without impairing the appearance uniformity. . Furthermore, by using an infrared light source as an infrared light emitting diode light source, the layout of the infrared light emitting section can be changed relatively easily, such as providing a plurality of infrared light emitting diode light sources in various arrangements, and is adapted to the design of the vehicle. And can be.

  According to the vehicle approach warning device of the fifth aspect, in the case of a variable light distribution headlamp called so-called AFS (Adaptive Frontlighting System), the irradiation direction of the headlamp is moved in accordance with a handle operation such as a curve. In this case, by moving the irradiation direction of the infrared light source in cooperation with each other in the same manner, the irradiation direction can be moved along the vehicle traveling direction such as the inside of the curve, and the approaching vehicle can be notified earlier, A warning can be aimed at.

  The embodiment of the present invention will be specifically described using an example in which the embodiment of the present invention is applied to a right-hand drive vehicle for left-side traveling. FIG. 1 shows a layout of a vehicle equipped with a vehicle approach warning device according to the present invention. Reference numeral 1 denotes a vehicle, and D1 denotes a forward traveling direction of the vehicle 1. At the front end of the vehicle, a left lamp 2 is located at the left front and a right lamp 3 is located at the right front, and a signal processing device 4 such as an infrared signal processing means and a warning means 5 are provided in the vehicle interior. 6 is a driver. In the following description, unless otherwise specified, the left side and the right side refer to the left and right with respect to the front direction (D1 direction in FIG. 1) for the driver.

  Each of the lamp 2 and the lamp 3 is provided with a traveling beam light source, a passing light source, an oblique irradiation infrared light source, and an infrared signal receiver in a housing opened forward, and the opening is covered with a translucent cover. It has been broken. FIG. 2 shows a top view of the right lamp 3 and FIG. 3 shows a front view of the left lamp 2 and the right lamp 3. The right lamp 3 includes a traveling beam light source 32 and a passing light source 33 in the housing 31, and an oblique irradiation infrared light source 34 and an infrared signal receiving unit 35 above the passing light source 33. The traveling beam light source 32 uses a light source such as a rotating paraboloidal reflector and a halogen bulb, and the passing light source 33 includes a rotating ellipsoidal reflector, a light source such as a halogen bulb, and a projection lens. Use lamps. In FIG. 2, reference numeral 7 denotes a vehicle body, 7a denotes a vehicle front end, 7b denotes a vehicle body side surface, and 37 denotes a translucent cover.

The oblique irradiation infrared light source 34 is composed of a large number of infrared light emitting diodes arranged so that the main irradiation direction is approximately 45 degrees to the right with respect to the vehicle front direction, and the infrared signal receiving unit 35 includes the main light receiving direction. Are arranged so as to be in a licking direction of approximately 45 degrees on the right side with respect to the vehicle front direction, and the oblique irradiation infrared light source 34 and the infrared signal receiving unit 35 are integrally configured.
Note that the left lamp 2 is configured symmetrically with the right lamp 3 with respect to the central axis in the traveling direction of the vehicle. That is, the oblique irradiation infrared light source 24 is composed of a number of infrared light emitting diodes arranged so that the main irradiation direction is approximately 45 degrees to the left with respect to the front direction of the vehicle. The infrared light receiving element 24 and the infrared signal receiving unit 25 are integrally formed by a semiconductor infrared light receiving element arranged so that the light receiving direction is a tangential direction of 45 degrees to the left of the vehicle front direction.
The oblique irradiation infrared light source 24 (left lamp) and the oblique irradiation infrared light source 34 (right lamp) emit light differently on the left side and the right side, for example, at different predetermined lighting frequencies. A wavelength or the like may be used as long as the difference between the left side and the right side can be detected. It is most preferable in terms of reliability and cost to distinguish the left side and the right side by different lighting periods.

  FIG. 4 shows a layout around the intersection when a vehicle equipped with the vehicle approach warning device according to the present invention runs on a road intersection. The road is left-hand traffic. Runway A and runway B intersect at intersection K, self-propelled vehicle A1 travels along runway A in direction D2, other vehicle B1 travels along runway B in direction D3, and each vehicle A1, B1 intersects. Trying to enter K.

  At this time, the self-propelled vehicle A1 has a slanting direction of 45 degrees leftward from the oblique irradiation infrared light source 34 provided in the right lamp 3 toward the front of the vehicle, specifically, 45 degrees slanting leftward toward the front of the vehicle. An infrared signal is transmitted at an irradiation width angle of 10 to 40 degrees. Similarly, the other vehicle B1 is also provided with a vehicle approach warning device according to the present invention, and for the other vehicle driver, a slanting direction about 45 degrees on the right side from the oblique irradiation infrared light source provided in the left lamp toward the front of the vehicle, specifically, The infrared signal is transmitted at an irradiation width angle of 10 to 40 degrees toward the licking direction of 45 degrees on the right side toward the front of the vehicle.

  FIG. 5 is an explanatory diagram for explaining the infrared signal processing means performed based on the signal received by the infrared signal receiver 35 and the warning means for performing warning based on the result of the infrared signal processing means. The infrared signal receiving unit 35 receives infrared light incident toward the self-propelled vehicle A1. After being converted into an electric signal by light-electric conversion, it is calculated by the infrared signal processing means 4, and a warning is given to the driver by the vehicle approach warning device 5 in a predetermined case.

  The left front infrared signal receiving unit 25 provided at the left front part of the self-runner A1 is a first reception signal processing means for receiving and determining a signal transmitted from the right front oblique irradiation infrared light source provided at the right front part of the other vehicle B1. The right front infrared signal receiver 35 connected to the right front is connected to a second received signal processing means for receiving and determining a signal transmitted from the left front obliquely irradiated infrared light source provided on the left front of the other vehicle B1. Has been. The first received signal processing means and the second received signal processing means may be provided separately or integrated.

  The infrared signal processing means 4 shown in FIG. 5 shows an integrated example. The infrared signal processing means 4 includes a frequency detection device 41, an arithmetic device 42 and an output circuit 43. The frequency detector 41 is configured so that the oblique irradiation infrared light source 24 (left lamp) and the oblique irradiation infrared light source 34 (right lamp) emit light at different predetermined frequencies. Detect frequency. The calculation device 42 compares the detected frequency with a pre-recorded frequency to determine whether the signal is from the right lamp or the left lamp, and calculates its intensity change with respect to the travel time, and the other vehicle B1. The approach state of is calculated. The output circuit 43 converts a signal related to the approach state of another vehicle recognized by the arithmetic device into a signal suitable for the alarm device 5 and outputs the signal. A warning sound such as a buzzer is suitable for the alarm. The alarm device may use a warning light display in the meter. When a vehicle approach is detected, it is effective to simply issue a warning with a buzzer or warning display. However, if there is a device that operates the brake pedal for a while, the operation is performed along with this detection. By making effective, it becomes possible to assist the brake operation that is almost always performed after approaching. When this function is used, the time from the recognition of approach to the start of deceleration of the vehicle is further shortened, and if there is a possibility of collision, it can be prevented in advance.

  When there is an obstacle such as a building or a roadside tree in the intersection K1 between the runways A and B, and the prospect is poor, the drivers of the vehicles A1 and B1 must visually confirm each other's vehicles. Have difficulty. However, in the vehicle approach warning device 1 according to the present embodiment, the existence of the other company B1 is confirmed earlier than the visual confirmation by the oblique irradiation infrared light source and the infrared signal receiving unit provided at the left and right ends of the front end of the vehicle. This can be confirmed by vehicle-to-vehicle communication. FIG. 6 is an explanatory diagram showing the difference between the other company's confirmation by visual observation and the other company's confirmation by the vehicle approach warning device according to the present embodiment. The position where the self-runner A1 confirms the other vehicle B1 cannot be confirmed unless it is the position of D and D ′ in the case of visual observation. However, in the case of the vehicle approach alarm device according to this embodiment, C and C It can be confirmed at the position of '. In the drawing, the dotted line indicates the position of the light beam for visual confirmation and the position of the vehicle-to-vehicle communication by the vehicle approach warning device, and the two match, but the position of the vehicle differs by a distance d2. That is, it is possible to detect the distance d2 earlier, and it is possible to suppress a collision at the time of encounter. The distance d2 was in the range of several meters according to the inventors' investigation.

FIG. 7 shows a layout when a vehicle equipped with the vehicle approach warning device according to the present invention runs on a curve with poor visibility, and the road is left-hand traffic. The self-propelled vehicle A1 travels along the track A in the direction D2, the other vehicle B1 travels along the track B in the direction D3, and the vehicles A1 and B1 are going to travel facing each other. FIG. 7 (A) shows a state in which the vehicle approach warning device according to the present invention is used and is confirmed by vehicle-to-vehicle communication, and FIG. 7 (B) shows a state in which the vehicle is visually confirmed.
Even in this case, in the vehicle equipped with the vehicle approach warning device according to the present invention, it can be detected earlier by the time corresponding to the distance d1 than in the case of visual observation, and the danger of a collision at a corner is suppressed in advance. You can get.

  Here, the examination result of the irradiation direction and irradiation range of the oblique irradiation infrared light sources 24 and 34 will be described. In order to avoid collisions with oncoming vehicles, it is important to recognize the presence of other vehicles as soon as possible. As a means for recognizing other vehicles, many methods such as the method described in the prior art are known. However, in any case, there has been a problem that environmental infrastructure needs to be improved or the cost of the apparatus becomes high. In the present embodiment, a vehicle approach alarm device capable of alarming the approach of a vehicle while adopting an inexpensive and simple configuration such as an oblique irradiation infrared light source, an infrared signal receiving unit, a signal processing unit, and a warning unit is provided. be able to. In particular, the irradiation directions of the oblique irradiation infrared light sources 24 and 34 are provided at the left front end and the right front end of the vehicle so that the irradiation areas intersect each other. As a result, in the relationship with the oncoming vehicle, vehicle-to-vehicle communication can be performed earliest. Although the irradiation direction differs depending on various intersections and curves, according to the experiments by the present inventors, the oblique irradiation infrared light source provided at the left front portion of the vehicle is directed to the licking direction of 45 degrees on the right side toward the front of the vehicle. It is preferable to have directivity for irradiating a range of an irradiation width angle of 10 to 40 degrees. This is because, within this range, the time (distance) during which detection can be performed earlier at a substantially perpendicular intersection and an acute curve with poor visibility is possible compared to the case of visual observation. When the irradiation direction is an angle smaller than 30 degrees and larger than 60 degrees, the time (distance) that can be shortened compared to the case of visual observation at an intersection or the like is reduced, which is not preferable. This is because when the irradiation range is narrower than 10 degrees, the detection range is narrowed, and when the irradiation range is wider than 40 degrees, the light from the oblique irradiation infrared light source is expanded, so that the projectability to a distant place deteriorates.

Next, a second embodiment will be described. In this embodiment, the present invention is applied to an AFS (Adaptive Frontlighting System) lamp that is a variable light distribution headlamp. 8 is a top view of the AFS lamp, and FIG. 9 is a front view of the AFS light source for passing. Moreover, FIG. 10 is explanatory drawing of the vehicle approach warning apparatus of 2nd embodiment.
The AFS lamp 10 is provided with a traveling beam light source 12, a passing AFS light source 13, an oblique irradiation infrared light source 14, and an infrared signal receiving unit 15 in a housing 11 opened forward, and the opening is provided with a translucent cover 16. Covered with
The passing AFS light source 13 includes a passing reflecting mirror 17 to which a light source such as a halogen bulb is attached, a driving unit 18 that rotates the passing reflecting mirror 17 in the left-right direction about a vertical line, and a holding frame 19. . A passing reflector 17 is rotatably attached to the holding frame 19, and the driving unit 18 is attached and fixed thereto. The holding frame 19 is fixed to the housing 11.

  An oblique irradiation infrared light source 14 and an infrared signal receiving unit 15 are disposed on the passing AFS light source 13. Since the oblique irradiation infrared light source 14 and the infrared signal receiving unit 15 are the same as those in the previous embodiment, a detailed description thereof is omitted here. The oblique irradiation infrared light source provided at the left front of the vehicle front end emits infrared light toward the right, and the oblique irradiation infrared light source provided at the right front of the vehicle front end emits infrared light toward the left. Therefore, as in the previous embodiment, the optical paths of the two intersect each other in front of the vehicle.

  The infrared signal processing means 50 includes a detection device 51, an arithmetic device 52, and an output device 53. The frequency detection device 51 detects the oblique irradiation infrared light source provided in the left AFS lamp and the oblique irradiation infrared light source provided in the right AFS lamp, which emit light at different predetermined frequencies, based on the received infrared frequency. . The calculation device 52 compares the detected signal with the left and right signals recorded in advance to determine whether the signal is from the right lamp or the left lamp, and calculates its intensity change with respect to the travel time. Then, the approaching state of the other vehicle is calculated. The calculation device 52 also performs calculations for controlling driving of an AFS lamp, which will be described later.

  In the present embodiment, an I / F device 54 and a vehicle information device 55 are further provided, and the calculation device 54 performs calculations for controlling the rotation state of the passing AFS lamp. The vehicle information device 55 is a device that indicates a vehicle state such as a vehicle steering angle, vehicle speed, acceleration, and headlight lighting information. For example, the steering angle is detected by an angle sensor, and various information is transmitted and received. Output to the I / F device 54 to be performed. The I / F device 54 outputs a predetermined signal from the vehicle information device 55 to the arithmetic device 52. In the arithmetic device 52, along with the above-described calculation of the approaching state of the other vehicle, a signal for controlling the driving of the AFS lamp is generated based on the signal from the I / F device 54 and is output to the output device 53. The output device 53 outputs, to the alarm device 5 that warns the driver with a buzzer or the like, a signal that matches the alarm device 5 with respect to the approach state of another vehicle recognized by the arithmetic device. In a predetermined case, a signal is simultaneously output to the driving unit 18 of the AFS lamp, and the light distribution of the AFS light source 13 is varied by the angle α in the vehicle traveling direction in response to the operation state of the vehicle.

  The oblique irradiation infrared light source 14 and the infrared signal receiving unit 15 are mounted and fixed on the rotating shaft above the passing AFS light source 13 as shown in FIG. Thereby, as shown by the dotted line in FIG. 8, when the passing AFS light source 13 rotates, the oblique irradiation infrared light source 14 and the infrared signal receiving unit 15 also rotate together. Therefore, the irradiation range and the light receiving range can be directed to the irradiation range by the passing AFS light source 13, that is, the traveling direction of the vehicle.

  As described above, the example in which the oblique irradiation infrared light source and the infrared signal receiving unit are provided above the passing light source in the vehicle headlamp has been described. However, the traveling light source in the vehicle headlamp as shown in FIG. And it can also be provided side by side at positions outside the vehicle light source for passing. In this case, since it is provided at the end of the vehicle, vehicle-to-vehicle communication with another vehicle can be performed from an earlier stage at a corner or the like. Moreover, you may provide separately in the exterior in a vehicle headlamp, for example in a bumper.

  The vehicle approach warning device according to the present invention may be provided with an ON / OFF switch. In that case, if it is determined that the driver is not necessary, it can be turned OFF. When the driver gets in for the first time, it is desirable from the viewpoint of safety that the specified value starts from ON. It is also possible to link with a navigation system. On a straight road without an intersection based on information from the navigation system, the operation of the vehicle approach warning device may be stopped, and at this time, power consumption can be reduced. In addition, since there are many intersections in the urban area, the driver may be bothered if it operates when it is not necessary to operate. Therefore, for example, the control may be stopped only when driving on a two-lane road. It will be apparent to those skilled in the art that the present invention is not limited to these, and various modifications, substitutions, combinations, and the like are possible.

  The vehicle approach warning device attached to the vehicle can easily detect and warn of the presence or absence of an oncoming vehicle at an early stage. Especially, the oblique irradiation infrared light source and red By providing an external signal receiving unit, vehicle-to-vehicle communication can be realized more quickly and reliably with an inexpensive configuration, and it can be used for trucks traveling on predetermined roads in factories and vehicles traveling on general roads. Is also applicable.

It is explanatory drawing which shows the example of a layout around the crossing part in the runway of a self-propelled vehicle. It is a top view of a right lamp. It is a front view of a left side lamp and a right side lamp. It is explanatory drawing which shows the layout around the crossing part in case the vehicle carrying the vehicle approach warning device based on this invention drive | works a road crossing part. It is explanatory drawing explaining the warning means which performs a warning based on the result of the infrared signal processing means performed based on the signal received in the infrared signal receiving part, and the said infrared signal processing means. It is explanatory drawing which shows the difference between the other company confirmation by visual observation in a road crossing part, and the other company confirmation by the vehicle approach warning apparatus which concerns on this embodiment. It is explanatory drawing which shows the difference between the other company confirmation by visual observation in a corner, and the other company confirmation by the vehicle approach warning apparatus which concerns on this embodiment. It is a top view of an AFS lamp. It is a front view of the AFS light source for passing. It is explanatory drawing explaining the warning means which performs warning based on the result of the infrared signal processing means performed based on the signal received in the infrared signal receiving part of 2nd Embodiment, and the said infrared signal processing means. It is a front view of the other lamp | ramp which concerns on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vehicle 2 Left side lamp 3 Right side lamp 4 Infrared signal processing means 5 Vehicle approach warning device 6 Driver 7 Car body 7a Vehicle front end 7b Car body side surface 10 AFS lamp 11 Housing 12 Light source 13 for passing beam AFS light source 14 for passing obliquely light source
15 Right front infrared signal receiving unit 16 Translucent cover 17 Reflecting mirror 18 Driving unit 19 Holding frame

31 housing 32 light source for traveling beam 33 light source for passing 34 obliquely irradiated infrared light source 35 right front infrared signal receiving unit 37 translucent cover 25 left front infrared signal receiving unit 41 frequency detection device 42 arithmetic device 43 output device 50 red Outside signal processing means 51 Detection device 52 Arithmetic device 53 Output device 54 I / F device 55 Vehicle information device D1 Traveling direction A, B Runway K Intersection A1 Self-propelled vehicle B1 Other vehicle K1 Inside intersection

Claims (5)

A first oblique irradiation infrared light source and a first infrared signal receiver provided at the left front of the vehicle; a second oblique irradiation infrared light source and a second infrared signal receiver provided at the right front of the vehicle; A vehicle approach warning device comprising an infrared signal processing means for processing a received infrared signal and a warning means for giving a warning based on a result of the infrared signal processing means,
The first oblique irradiation infrared light source emits an infrared signal at an irradiation width angle of 10 to 40 degrees toward the right side 45 degrees toward the front of the vehicle, and the second oblique irradiation infrared light source is , An infrared signal is transmitted at a wavelength or modulation different from that of the first oblique irradiation invisible light source at an irradiation width angle of 10 to 40 degrees toward the left side 45 degrees toward the vehicle forward direction,
The first infrared signal receiver is connected to first reception signal processing means for receiving and determining a signal transmitted from a second oblique irradiation infrared light source of another vehicle, and the second infrared signal receiver is Connected to the second received signal processing means for receiving and determining the signal transmitted from the first oblique irradiation infrared light source of the other vehicle,
An approach recognizing means for recognizing an approaching state of another vehicle by analyzing a received signal of the first received signal processing means and / or a second received signal processing means;
A vehicle approach warning device comprising warning means for warning a driver based on a signal from the approach recognition means. The approach recognition means further compares the signal amounts of the first reception signal processing means and the second reception signal processing means to determine whether the approach of the other vehicle is from the left side, the right side or the front side. The vehicle approach warning device according to claim 1, further comprising: The approach recognizing means includes means for obtaining an increase amount or an increase rate of the signal intensity per unit time of the reception signal of the first reception signal processing means and / or the second reception signal processing means. The vehicle approach warning device according to claim 1 or 2. The first oblique irradiation infrared light source and the second oblique irradiation infrared light source are installed in the lamp body of the vehicle headlamp so that the main optical axis is a licking direction of 45 degrees with respect to the vehicle front direction. 4. The vehicle approach alarm device according to claim 1, wherein the vehicle approach alarm device is an infrared light emitting diode light source. The vehicle headlamp is a variable light distribution headlamp provided with a light source capable of moving an irradiation direction in accordance with a traveling direction of the vehicle, wherein the first oblique irradiation infrared light source and the second oblique 5. The vehicle approach alarm device according to claim 4, wherein the irradiation infrared light source is connected to a driving unit that moves an irradiation direction in cooperation with a light source to which the variable light distribution headlamp moves.

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