JP2003346297A - Information tag, road side radio transceiver, onboard side radio transceiver, and traffic safety supporting system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve a problem wherein a pedestrian is required to carry a portable transceiving means, and a problem wherein a risk of an inability to transmit/receive caused by use-up of a battery or the like is generated when transceived with an automobile or the like each other, in a conventional traffic safety support system. <P>SOLUTION: Information tags 103 for transmitting information by electromagnetic induction bonded preliminarily or built in to an article worn by the pedestrian, a bicycle and a wheelchair, and a road side radio transceiver installed in a road side to judge a situation of positions, moving speeds and moving directions of the pedestrian, the bicycle, the wheelchair and the like, based on the information tags, so as to transmit road information to the automobile or the like are provided to display the situations of the pedestrian, the bicycle, the wheelchair and the like, notification of collision, and the like, on an onboard display means 70 by a signal from the road side radio transceiver, and to inflate an air bag or the like mounted on an outside of the automobile toward a collision object when it is impossible to evade the collision. <P>COPYRIGHT: (C)2004,JPO

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to collision avoidance of a moving object using an information tag, and relates to a relatively low-speed moving object such as a pedestrian, a bicycle and a wheelchair on a road, and a relatively high speed object such as an automobile and a motorcycle. The present invention relates to a traffic safety support device for ensuring traffic safety with a moving object.

[0002]

2. Description of the Related Art Conventionally, a traffic safety support device described in, for example, Japanese Patent Application Laid-Open No. 7-306995 is known. In the above device, the pedestrian has the portable transmitting / receiving means, and the automobile has the on-vehicle transmitting / receiving means. In this device, the portable transmission / reception means and the on-vehicle transmission / reception means mutually transmit and receive information, thereby finding a pedestrian with a high risk of colliding with an automobile, and outputting an alarm to both.

[0003]

However, in this traffic safety support device, the pedestrian must carry a portable transmission / reception means. Since the pedestrians mutually transmit / receive with a car or the like, the transmission / reception is not possible due to running out of a battery or the like. There is a problem that the danger of missing may occur.

[0004]

SUMMARY OF THE INVENTION In order to solve this problem, the present invention relates to an information transmission apparatus for transmitting information to articles, bicycles, and wheelchairs worn by pedestrians by means of electromagnetic induction previously attached or built in. It is installed on the road side with tags and calculates the direction and speed of movement from pedestrians, bicycles and wheelchairs based on information tags, predicts collisions between pedestrians and cars, and provides information on the danger of collision to cars and other vehicles. The roadside wireless transmitting and receiving device to be transmitted and the signal from the roadside wireless transmitting and receiving device, on the display means mounted on the vehicle, the position on the road such as a pedestrian, a bicycle and a wheelchair, a moving direction and a moving speed and a warning for a collision are displayed, When it is impossible to avoid a collision, this is achieved by inflating an airbag or the like mounted outside the automobile toward the collision target. Thereby, a traffic safety support device between a low-speed moving object such as a pedestrian, a bicycle and a wheelchair and a high-speed moving object such as a car and a motorcycle can be obtained.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention according to claim 1 of the present invention is arranged near a road including a sidewalk and a road and a road including a wall and a power pole, receives a radio signal, and transmits data included in the radio signal. Tag information reading means to output the data, pedestrians located on the road from the data, low-speed moving objects including bicycles and wheelchairs and high-speed moving objects including automobiles and motorcycles from the position change of the moving speed and Calculate the moving direction, predict the risk indicating the danger of collision between the low-speed moving body and the high-speed moving body, the moving speed,
A roadside radio comprising: roadside road information determining means for outputting the moving direction and the degree of risk; a roadside transmitting means for converting an output signal of the roadside road information determining means into a radio signal; and an antenna for transmitting the radio signal. This is a transmission / reception device, and has an effect of avoiding a risk that a low-speed moving body such as a pedestrian, a bicycle, or a wheelchair collides with a high-speed moving body such as an automobile, or reducing damage at the time of collision.

According to a second aspect of the present invention, there is provided a roadside radio transmitting / receiving apparatus further including roadside display means for displaying information on a high-speed moving object from an output signal of the roadside road information determining means. By indicating the presence of a high-speed moving object, the vehicle has an effect of avoiding the danger of collision.

According to a third aspect of the present invention, a plurality of tag information reading means are arranged such that the communication areas of the tag information reading means overlap on a road with poor visibility including an intersection. The roadside wireless transmission / reception device described above has an effect of improving the accuracy of measuring the moving speed and moving direction of a low-speed moving object.

According to a fourth aspect of the present invention, the communication area of the tag information reading means is equal to or less than the stride of the pedestrian, and the communication area is narrowed. Thus, there is an effect that the movement of the low-speed moving body in the communication area is reduced, and the accuracy of the measurement of the moving speed and the moving direction is improved.

According to a fifth aspect of the present invention, there is provided the roadside wireless transmitting / receiving apparatus according to the third aspect, wherein the tag information reading means receives the same wireless signal at at least three places. Detecting the position of the information tag from the tag has the effect of improving the measurement accuracy of the moving speed and the moving direction.

According to a sixth aspect of the present invention, there is provided an antenna mounted on a high-speed moving body for receiving a radio signal, on-vehicle receiving means for converting the radio signal received by the antenna into a digital signal, and on-vehicle receiving means A vehicle road information determining means for determining a risk indicating a danger of collision between the low-speed moving body and the high-speed moving body and a position, a moving direction and a moving speed of the low-speed moving body, and the on-vehicle road information determining means And an on-vehicle display device for displaying the road condition and the degree of danger from the output signal of the low-speed moving object based on the received radio signal. Has the effect of avoiding the danger of collision.

According to a seventh aspect of the present invention, there is provided the on-vehicle wireless transmitting / receiving apparatus according to the sixth aspect, wherein the on-vehicle display means outputs the sound and the color pattern stepwise according to the degree of danger. This has the effect that the driver of the body can be effectively informed of the danger of collision.

According to an eighth aspect of the present invention, the on-vehicle display means displays the low-speed moving object according to the degree of risk. It has the effect of indicating the danger of collision and the possibility of avoidance to the driver, and prompting the driver to take action to avoid collision.

According to a ninth aspect of the present invention, there is provided the on-vehicle wireless transmission / reception apparatus according to the sixth aspect, further comprising a collision mitigation means for mitigating a collision with a low-speed moving object based on the risk output from the on-vehicle road information determination means. And has the effect of reducing the impact due to the collision with the low-speed moving body.

According to a tenth aspect of the present invention, the collision mitigation means is an airbag mounted on the outside of the high-speed moving body as the vehicle-mounted radio transmitting / receiving apparatus according to the ninth aspect. It has the effect of alleviating the impact due to.

The invention according to claim 11 further comprises an on-vehicle sensing means including a camera and a radar, and the on-vehicle road information determining means determines the position of the low-speed moving body from the output signals of the on-vehicle sensing means and on-vehicle receiving means. 11. The in-vehicle wireless transmission / reception device according to claim 6, wherein the traveling speed and the traveling direction are determined. By adding information from on-vehicle sensing means, the accuracy of information on the low-speed moving body is improved. Has the effect of being able to

According to a twelfth aspect of the present invention, there is provided an on-vehicle identification information output means for outputting information unique to a high-speed moving object, and an on-vehicle transmission for converting an output signal of the on-vehicle identification information output means into a radio signal and outputting the signal to an antenna. Means for transmitting and receiving information on a high-speed moving object to the roadside radio transmitting and receiving device, thereby causing a collision between the low-speed moving object and the high-speed moving object. Danger can be predicted, and collision with a low-speed moving object can be avoided.

According to a thirteenth aspect of the present invention, there is provided an information tag which is built in a low-speed moving object including articles, bicycles, and wheelchairs normally carried by a pedestrian, and transmits unique information for identifying the low-speed moving object by electromagnetic induction. This has the effect that the low-speed moving body can notify its own position, moving speed and moving direction without being conscious of it.

According to a fourteenth aspect of the present invention, there is provided a traffic safety support device including the information tag according to any one of the first to thirteenth aspects, a roadside radio transmitting / receiving device and a vehicle-mounted radio transmitting / receiving device. This has the effect that collision with a high-speed moving object can be avoided without being conscious.

According to a fifteenth aspect of the present invention, there is provided first information relating to a low-speed moving object included in a radio signal received by an information tag reading means disposed on a road including a sidewalk and a road and a road including a wall and a telephone pole. And the second related to high-speed moving objects
A second step of calculating a moving direction and a moving speed of the low-speed moving object from a reception time interval of the first information and a position of the received information tag reading unit. A third step of calculating a moving direction and a moving speed of the high-speed moving body from the reception time interval of the second information and the position of the received information tag reading means; and the second step and the third step. The program is a program for predicting a risk indicating a danger of collision between the low-speed moving body and the high-speed moving body based on the moving direction and the moving speed output from the step. It has the effect of predicting the gender by a computer and instructing to avoid or mitigate a collision.

FIG. 1 shows an embodiment of the present invention.
This will be described using FIGS.

(Embodiment 1) FIG. 1 shows a traffic safety support apparatus according to an embodiment of the present invention, wherein 101 indicates a pedestrian as a low-speed moving body, 102 indicates a car as a high-speed moving body, and 103 indicates a walker. Indicates an information tag built into the article worn by the person, 104 indicates tag information reading means arranged on the side of the road, 105 indicates roadside road information determining means,
Reference numeral 106 denotes a roadside display unit for informing the low-speed moving body 101 of the state of the high-speed moving body 102, and 107 denotes a low-speed moving body 10
Roadside wireless transmission means for transmitting the status of the first and other high-speed mobile units 102 to the on-vehicle wireless transmission / reception apparatus 108; 108, an on-board wireless transmission / reception apparatus mounted on the high-speed mobile body 102; 1 shows an antenna for outputting a wireless signal of the first embodiment.

The information tag 103 will be described briefly.
The information tag 103 includes a watch that is an article carried by a pedestrian,
It is directly attached to or incorporated in the low-speed moving body 101 that moves at a relatively low speed, including accessories, glasses, belts and shoes, and bicycles and wheelchairs. This information tag 103
Is an RFID (Radio Frequency Id)
An ID tag is configured to be activated by electromagnetic induction by receiving a radio wave from the tag information reading unit 104, and to identify an information tag (Identify).
identification: ID) code to tag information reading means 10
4 is a wireless communication means that does not need to use a power source such as a battery.

The high-speed moving body 102 and the low-speed moving body 1
01, in particular, the low-speed moving body 101 uses an ID code capable of distinguishing a pedestrian, a bicycle, and a wheelchair.
It is possible to more accurately determine the situation of a moving object located on a road.

The roadside transceiver will be described with reference to FIGS.

The tag information reading means 104 reads the information tag 10
The ID code received from the roadside road information determining means 10
5 from the ID code received by the plurality of tag information reading means 104.
The transmission source of the D code is a low-speed moving object 101, particularly, a pedestrian,
It is determined whether the vehicle is a bicycle or a wheelchair, or a high-speed moving body 102 that moves at a relatively high speed including an automobile and a motorcycle.

The ID code may be transmitted from a source other than the information tag. For example, a mobile object having a power source, such as an automobile, does not require a signal from the tag information reading unit 104,
By using your own power supply and sending the ID code,
It is possible to obtain more accurate position information.

Here, the tag information reading means 104, the roadside road information determining means 105, the roadside display means 106, and the roadside wireless transmission means 107 are connected by wire or wirelessly.

Next, the moving direction and speed of the transmission source of the ID code are calculated from the installation position and the interval of the tag information reading means 104.

Here, when the vectors of the calculated moving direction and speed of the low-speed moving body 101 and the high-speed moving body 102 intersect, it is determined that there is a danger of collision, and the roadside display means 106 displays the high-speed moving object. The information indicating the presence of the body 102 is output, and the roadside transmitting unit wirelessly outputs information on the danger of collision with the low-speed moving body 101 to the high-speed moving body 102 or the like to the on-vehicle wireless transmission / reception device 108.

The roadside display means 106 notifies the low-speed moving body 101 of the approach of the high-speed moving body 102 according to the output signal of the roadside road information determining means 105. Here, the roadside display means 106 can notify the danger of collision by characters, images, sounds, and the like.

Next, a brief description will be given of a method of acquiring information for detecting the moving direction, the moving speed and the position of the information tag 103 by the tag information reading means 104.

The low-speed moving body 101 is a tag information reading means 1
When passing through the vicinity of 04, the information tag 103 is activated by a radio wave emitted from the tag information reading means 104, and transmits an ID code unique to the tag. The ID code is received by the tag information reading means 104. Since each of the tag information reading units holds the position information, the tag information reading unit can detect an approximate position of the pedestrian.

By arranging a plurality of tag information reading means 104, it is possible to accurately calculate the moving direction, moving speed and position of the low-speed moving body 101.

A specific example will be described below.

When the information tag 103 of the electromagnetic induction type is used, the range readable by the tag information reading means 104 is 1.5 m or less in radius. In the vicinity of a high place, for example, at a place relatively far from the intersection, the tag information reading means 104 is arranged at a wide interval. Also, at a radius of about 5 m from the intersection, two
They are arranged at m intervals.

Here, specific installation locations are a road including a sidewalk and a road, and a vicinity of a road including a fence or wall of a building beside the road, a telephone pole, a streetlight, and the like.

FIG. 2 shows the relationship between the information tag 103 and the tag information reading means 104 when the tag information reading means 104 is arranged at wide intervals.
A communication area 201 of the reader is shown, and 103a is a time t0.
Shows the position of the information tag 103 at 103, and 103b is the time t1.
Indicates the position of the information tag 103 at time t3, and 103c indicates the time t2.
2 shows the position of the information tag 103 in FIG. FIG. 3 is a flowchart showing a procedure for detecting the position, the moving direction, and the moving speed of the information tag 103.

At time t0, the tag information reading means 104 reads the ID code of the information tag 103a (S301), and recognizes the low-speed moving body 101 and the high-speed moving body 102 according to the type of the ID code. Further, when the object is the low-speed moving object 101, a pedestrian, a bicycle, a wheelchair, and the like are recognized (S302). Next, the number of tag information reading means 104 that has identified the information tag 103 is calculated. If the number of the tag information reading means 104 is two or less, the standby state for reading the tag information is set again (S303).

Next, at time t1, the information tag 103
b is outside the communication area 201 of the tag information reading means 104, but the information of the information tag 103 recognized at time t0 is stored in the roadside road information determining means 105.

Further, at time t2, the information tag 103
The tag information reading unit 104b reads the ID code of the information tag 103c from the ID code in the same manner as at time t0.
The holder of c is recognized. Here, the roadside road information determining means 105 determines whether the recognized ID code has been recognized by the other tag information reading means 104a. If the recognition is performed at two or more locations, the read time and position are used. The moving direction and the moving speed of the information tag 103 are calculated (S3
04).

FIG. 4 shows the relationship between the information tag 103 and the tag information reading means 104 on an unsightly road such as an intersection, a T-junction, a curve, or an entrance of a building near a place having a high risk of collision. A case is shown where the arrangement interval of the information reading means 104 and the communication area 201 are narrowed, the communication impossible area area is eliminated, and the overlapping area is minimized, and the information reading means 104 is arranged densely.

For example, if the communication area 201 of the tag information reading means 104 is set to 50 cm in accordance with the stride when an adult male pedestrian is walking, the information tag 10
Reference numeral 3 denotes a position for each step, and the position can be specified at all of the times t0, t1, and t2. In FIG. 4, the times t0, t1, and t2 and the pedestrian's stride match,
By shortening the time interval for reading the tag information, it is possible to detect the positions of the pedestrian and the bicycle running.

In the vicinity of a school road or a school, the communication area 201 is further narrowed to match the stride of a young person.
More accurate position detection becomes possible.

FIG. 5 shows the relationship between the information tag 103 and the tag information reading means 104 near a place where the risk of collision is high. The arrangement interval of the tag information reading means 104 is reduced, and the communication area 201 is overlapped. 1 shows a case where a wireless signal transmitted from one information tag 103 is received by at least three or more tag information reading units 104.

As shown in FIG. 5, when ten tag information reading means 104 are arranged, the shaded portion is an area where the communication area 201 of three or more tag information reading means 104 overlaps.

FIG. 6 is a diagram showing the relationship between the information tags 103 communicating with the three tag information reading means 104. By using the intensity ratio of the radio waves having the same ID code read by the three adjacent tag information reading units 104 and the distance between the installation of the tag information reading units 104, it is possible to detect a more accurate position and speed. It is possible.

FIG. 7 is a diagram showing a flowchart for obtaining the moving speed and moving direction in FIG. The reading of the tag information, the identification of the ID code, the calculation of the moving speed and the moving direction are the same as those in FIG. 3, and the description is omitted.

The tag information acquired by the other tag information reading means 104 at the same time is identified from the acquired ID code (S401).

Next, as a specific method of position detection, tag information reading means 104a, 104b, 10b shown in FIG.
The position coordinates of 4c are X1, X2, and X3, respectively. Tag information reading means 104a, 104b,
At 104c, the electric field strength of the read radio wave is represented by E1, E
2 and E3. The relationship between the electric field intensity and the distance is obtained in advance, and a circle having the radius obtained by the distance obtained from the electric field intensity as the position coordinate of the tag information reading means 104 is obtained, and the intersection of the circles is detected as the position of the information tag 103. (S40
2).

The moving speed and the moving direction can be obtained from the times t0 and t1 at which the position of the tag information is detected, and the moving speed and the moving direction can be obtained from a plurality of positions.

The tag information reading means 104 constantly emits radio waves and can read the ID code instantaneously. Therefore, if the moving speed of a car, a bicycle, a wheelchair, or a pedestrian is sufficiently high, the speed and the position are sufficient. Can be detected.

Further, according to the present invention, the low-speed moving body 101 which is not moving and whose speed is calculated as 0, the tag information reading means 10
The low-speed moving body 101 that moves while staying within the communication area 201 of No. 4 is not a danger that collision cannot be avoided,
Depending on the route of the car, there is a danger of collision,
Data indicating the presence of a pedestrian is transmitted to the car.

The low-speed moving body 101 and the high-speed moving body 1
02 can be identified by using different frequencies.

Note that the classification code is added to the head of the ID code, so that the low-speed moving object 101 and the high-speed moving
02 can be identified. In particular, low-speed vehicles include adult pedestrians, young pedestrians, older pedestrians,
By subclassifying such as bicycles and wheelchairs, taking into account the characteristics of each object, predicting the moving direction and speed,
By selecting an optimal risk avoidance method, the accuracy of risk avoidance can be improved.

Next, the on-vehicle wireless transmission / reception device 108 will be described with reference to FIGS.

FIG. 8 shows the configuration of the on-vehicle wireless transmission / reception device 108, in which reference numeral 701 denotes an antenna, and reference numeral 702 denotes the antenna 7
01 denotes an on-vehicle receiving means for converting the received radio signal into a digital signal, 703 denotes an on-vehicle road information judging means based on road information contained in the digital signal,
Reference numeral 04 denotes a low-speed moving object 101 output from the on-vehicle road information determining means 703 and on-vehicle display means for displaying information indicating a danger of collision. Reference numeral 705 denotes a collision mitigation means for alleviating a collision with the low-speed moving object 101. Reference numeral 706 denotes on-vehicle identification information output means for outputting an ID code for identifying the high-speed mobile unit 102;
FIG. 2 shows an in-vehicle transmitting unit that converts a D code into a radio signal and outputs the signal to an antenna 701.

The antenna 701 receives the radio signal output from the roadside transmitting means and outputs it to the on-vehicle receiving means 702.
The on-vehicle receiving unit 702 demodulates a digital signal from the wireless signal and outputs the demodulated signal to the on-vehicle road information determining unit 703. The on-vehicle road information determining unit 703 acquires information on the road from the digital signal and outputs information on the position, the moving speed, and the moving direction of the low-speed moving body 101 to the on-vehicle display unit 704.

In particular, when there is information on the danger of a collision, information on the danger of a collision is displayed on the on-vehicle display means 704 to alert the driver, and when the collision cannot be avoided, the information is placed outside the vehicle. By operating the collision mitigation means 705 such as the airbag and the brake, the impact on the pedestrian is reduced.

The on-vehicle identification information output means 706 always outputs the ID code unique to the high-speed moving body 102 to the on-vehicle transmission means 7.
07, the in-vehicle transmission unit 707 modulates the ID code into a radio signal, and transmits the radio signal from the antenna 701 to the roadside wireless transmission / reception device.

FIG. 9 is a flowchart showing a procedure for activating the collision mitigation device of the high-speed moving body 102. The roadside wireless transmitting / receiving device calculates the risk of collision and transmits a signal to the vehicle-mounted wireless transmitting / receiving device 108. In-vehicle wireless transceiver 10
No. 8 on-vehicle road information determination means 703 compares it with a first threshold value A which is a predetermined lower limit of safety (S501).
If the risk is below the threshold A, the process is terminated. If the risk is below the threshold A, the second lower limit of the predetermined safety is determined. Is compared with the threshold B (S502). If the risk is lower than the threshold B, it is determined that collision avoidance is impossible, and the collision mitigation device is activated (S504). If it exceeds, it is determined that danger avoidance is possible, and a danger warning is output to the in-vehicle display device to urge the driver of the automobile to avoid collision (S503).

Here, a method of calculating the degree of risk will be described. The degree of danger is calculated by the roadside road information determining means, and reaches the intersection and intersection of the paths of the low-speed moving body 101 from the moving direction, moving speed and position of the low-speed moving body 102 and the moving direction, moving speed and position of the high-speed moving body 102. Calculate the difference between the expected arrival times.

If it is predicted that the vehicle will arrive at the intersection of the course at the same time, it is determined that the risk of collision is high. , The threshold A is set to 5 seconds.

If the difference between the predicted arrival times is within 1 second, the danger of unavoidable collision and the threshold B are set to 1 second.

The danger of a collision is low by displaying a danger warning on the on-vehicle display means 704 of the on-vehicle wireless transmission / reception device 108 or determining the operation of the airbag and the brake as the collision mitigation means 705 according to the threshold determination. A warning to a pedestrian is suppressed, and a warning can be issued to the driver of the vehicle without an unnecessarily warning.

The predicted arrival time is calculated based on each I
Since the calculation is sequentially performed for each D code, even when a plurality of low-speed moving objects 101 exist, the accuracy of the risk determination is not affected.

Further, by using the degree of change of the moving speed, it is possible to perform more accurate risk determination.

When the difference between the predicted arrival times is within 5 seconds, the approach of the high-speed mobile unit 102 is notified to the low-speed mobile unit 101 by the roadside display means 106, so that the low-speed mobile unit 101 is notified. The danger of collision can be further suppressed.

Here, the threshold value A is set to 5 seconds, and the threshold value B is set to 1 second. However, the present invention is not limited to this, and the effects of the present invention can be obtained.

In addition to the above, the in-vehicle display unit 704 is equipped with a display and a speaker, and outputs a sound or a color according to the degree of danger, thereby informing the driver of the moving body of the danger sensuously.

Further, the on-vehicle display unit 704 displays danger information and position information using the car navigation map information in conjunction with the on-vehicle car navigation or the like, thereby improving the accuracy.

Further, the in-vehicle display means 704 displays the shape of a person, a bicycle, a wheelchair, or the like, and informs a driver of an automobile or the like of danger, thereby instantaneously recognizing road information.

By mounting on-vehicle sensing means such as a radar and a camera on an automobile or the like, information on pedestrians and low-speed moving objects obtained from on-vehicle sensing means can be obtained.
By integrating information on the pedestrian and the low-speed moving object obtained from the roadside wireless transmission / reception device, it is possible to perform a more accurate risk determination.

As described above, with the use of the traffic safety support device according to the present invention, it is possible to detect information on a moving object having a risk of collision at an intersection or a T-junction, thereby avoiding the risk of collision. However, even if the collision is unavoidable, the damage caused by the collision can be reduced. In particular, the high-risk low-speed moving object 101 such as a bicycle or a wheelchair is used.
Also, it is possible to prevent a collision with the high-speed moving body 102 such as an automobile.

The present invention is realized by a program, recorded on a recording medium such as a floppy (registered trademark) disk, and transferred, so that it can be easily implemented by another independent computer system.

As a recording medium, other than a floppy disk, an optical disk, an IC card, a ROM cassette, or the like may be used as long as it can record a program.

[0076]

As described above, according to the present invention, a moving object such as a pedestrian, a bicycle, a wheelchair or the like having a high risk of colliding with a car or the like is detected, and the danger of a collision with a moving object such as a car is notified. By doing so, collision can be avoided. Further, even in the case where a collision cannot be avoided, the damage can be reduced by operating the shock absorbing device.

[Brief description of the drawings]

FIG. 1 is a diagram showing a traffic safety support device according to a first embodiment of the present invention;

FIG. 2 is a diagram showing an arrangement of tag information reading means according to the first embodiment;

FIG. 3 is a flowchart showing a procedure for detecting a moving direction and a moving speed according to the first embodiment;

FIG. 4 is a diagram showing an arrangement of tag information reading means according to the first embodiment;

FIG. 5 is a diagram showing an arrangement of tag information reading means according to the first embodiment;

FIG. 6 is a diagram showing an arrangement of tag information reading means according to the first embodiment;

FIG. 7 is a flowchart showing a procedure for detecting a moving direction and a moving speed according to the first embodiment;

FIG. 8 is a diagram showing an in-vehicle wireless transmission / reception device according to the first embodiment;

FIG. 9 is a flowchart showing the operation of the collision mitigation means according to the first embodiment;

[Explanation of symbols]

101 Low-speed moving object 102 High-speed moving object 103 Information tag 104 Tag information reading means 105 Roadside road information determination means 106 Roadside display means 107 Roadside wireless transmission means 108 In-vehicle wireless transceiver 109 antenna 201 Communication area 701 antenna 702 In-vehicle receiving means 703 Vehicle road information judgment means 704 In-vehicle display means 705 Collision mitigation means 706 Vehicle identification information output means 707 In-vehicle transmission means

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) B60R 21/00 B60R 21/00 626E 628B 628 21/32 21/32 G08G 1/09 F G08G 1/09 H04B 5/02 H04B 5/02 B60R 21/34 693 (72) Inventor Takeo Azuma 1006 Kadoma, Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Megumi Yamaoka 1006 Odaka, Kadoma, Kadoma, Osaka Matsushita Electric Kenji Kondo, Inventor (72) Inventor Kenji, 1006 Kadoma, Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Inventor Keisuke Hayada 1006, Ojidoma, Kadoma, Osaka Pref. Person Mihoko Shimano 1006 Kadoma Kadoma, Kadoma-shi, Osaka Matsushita Electric Industrial Co., Ltd. F term (reference) 3D054 AA1 1 EE17 EE25 EE57 5H180 AA01 BB04 CC04 CC12 CC14 FF13 FF27 FF32 LL01 LL02 LL04 LL07 LL08 5K012 AB03 AB05 AC06 AC08 AC10 BA02

Claims (15)

[Claims] 1. Tag information reading means arranged near a road including a sidewalk and a road and a road including a wall and a telephone pole, receiving a radio signal, reading data included in the radio signal, and outputting the data, From the data, a moving speed and a moving direction are calculated from a position change of a low-speed moving body including a pedestrian, a bicycle and a wheelchair, and a high-speed moving body including an automobile and a motorcycle located on the road, and the low-speed moving body and the high-speed moving are calculated. Roadside road information determining means for predicting a risk indicating a danger of a body collision and outputting the moving speed, the moving direction and the risk, and a roadside for converting an output signal of the roadside road information determining means into a radio signal A roadside radio transmitting / receiving apparatus comprising a transmitting unit and an antenna for transmitting the radio signal. 2. From the output signal of the roadside road information determining means,
A roadside wireless transmission / reception device further including a roadside display unit for displaying information on a high-speed moving object. 3. The roadside wireless transmission / reception device according to claim 1, wherein a plurality of tag information reading means are arranged so that communication areas of the tag information reading means overlap on a road with poor visibility including an intersection. 4. The roadside wireless transmission / reception device according to claim 3, wherein the communication area of the tag information reading means is equal to or smaller than a stride at which a pedestrian walks. 5. The roadside wireless transmitting / receiving apparatus according to claim 3, wherein the tag information reading means receives the same wireless signal at at least three places. 6. An antenna mounted on a high-speed moving body for receiving a radio signal, on-vehicle receiving means for converting the radio signal received by the antenna into a digital signal, and a low-speed moving device based on an output signal of the on-vehicle receiving means. The vehicle road information determining means for determining the degree of danger indicating the danger of collision between the vehicle and the high-speed moving body and the position, moving direction and moving speed of the low-speed moving body; An on-vehicle wireless transmission / reception device having on-vehicle display means for displaying a situation and the degree of risk. 7. The on-vehicle wireless transmission / reception device according to claim 6, wherein the on-vehicle display means outputs the sound and the color pattern stepwise according to the degree of danger. 8. The on-vehicle wireless transmission / reception device according to claim 6, wherein the on-vehicle display means displays the low-speed moving object according to the degree of danger. 9. The on-vehicle wireless transmission / reception apparatus according to claim 6, further comprising: a collision mitigation means for mitigating a collision with a low-speed moving object based on the risk output from the on-vehicle road information determination means. 10. The on-vehicle wireless transmission / reception device according to claim 9, wherein the collision mitigation means is an airbag provided outside the high-speed moving body. 11. An in-vehicle sensing means including a camera and a radar, wherein the on-vehicle road information determining means determines a position, a moving speed, and a moving direction of the low-speed moving object from output signals of the on-vehicle sensing means and the on-vehicle receiving means. The in-vehicle wireless transmission / reception device according to any one of claims 6 to 10, which determines. 12. An in-vehicle identification information output means for outputting information specific to a high-speed moving object, and an on-vehicle transmission means for converting an output signal of the in-vehicle identification information output means into a radio signal and outputting the signal to an antenna. 12. The in-vehicle wireless transmission / reception device according to any one of items 6 to 11. 13. An information tag which is built in a low-speed moving object including a product usually carried by a pedestrian, a bicycle, and a wheelchair and transmits unique information for identifying the low-speed moving object by electromagnetic induction. 14. A traffic safety support device including the information tag according to claim 1, a roadside wireless transmitting / receiving device, and a vehicle-mounted wireless transmitting / receiving device. 15. The first information relating to the low-speed moving object and the second information relating to the high-speed moving object included in the radio signal received by the information tag reading means disposed on the road including the sidewalk and the road and the road including the wall and the telephone pole. A second step of calculating a moving direction and a moving speed of the low-speed moving object from a reception time interval of the first information and a position of the received information tag reading unit. A third step of calculating a moving direction and a moving speed of the high-speed moving body from the reception time interval of the second information and the position of the received information tag reading means; and the second step and the third step. A program for predicting a risk indicating a danger of collision between the low-speed moving body and the high-speed moving body, based on the moving direction and the moving speed output from the step.