JPH0981813A - Communication result judging device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To judge whether the communication result of communication executed between an on-vehicle equipment and a road equipment is valid or not independently of the traveling state and size of a vehicle. SOLUTION: When a four-wheel vehicle 90A and a two-wheel vehicle 90B are travelling in parallel, the vehicles 90A, 90B are respectively detected as a center position and a right edge position by communication in a communication area. Then the arrival of the vehicle 90A is detected by a line sensor 148, the communication position is compared with the arrival position, and when both the position coincide with each other, a communication result is judged as valid communication. On the other hand, the arrival of the vehicle 90B is detected by a line sensor 146, the communication position and the arrival position are compared with each other, and when both the positions coincide with each other, the communication result is judged as valid communication. When the communication result is invalid, both the vehicles 90A, 90B are photographed by a camera 180. The arrival position of the vehicle 90A detected by the sensor 146 is neglected and the arrival position of the vehicle 90B detected by the sensor 148 is neglected.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a communication result determination device, and more particularly, it determines whether a communication result between a vehicle-mounted device mounted on a vehicle and a roadside device installed on the roadside is good or bad. The present invention relates to a communication result determination device.

[0002]

2. Description of the Related Art Toll facilities collect usage fees. For example, a vehicle traveling on a toll road is charged according to the type of the vehicle and the distance traveled on the toll road. A road-vehicle communication device that automatically collects tolls at entrance gates and exit gates of toll roads by radio wave communication is known as a device that automatically collects usage fees for toll facilities. In this road-to-vehicle communication device, a communication device (hereinafter referred to as a road device) in which a communication area for transmitting / receiving (communicating) radio waves to the road is set as an interrogator for inquiring information to the corresponding vehicle. A communication device (hereinafter referred to as an in-vehicle device) for responding to information inquired in the communication area is installed in a vehicle, and information is exchanged between the in-vehicle device and the on-road device by radio communication. .

However, it is not possible to exchange information by radio wave communication with a vehicle that is not equipped with an in-vehicle device.
In addition, for vehicles with poor communication, vehicles with insufficient charge balance for paying fees, and vehicles that transmit vehicle type information different from the actual vehicle type by radio communication, the communication result by information exchange by radio communication Is incorrect. It is necessary to inform these vehicles that proper information could not be sent and received, and the roadside equipment determines whether the communication result is appropriate and the vehicle with the incorrect communication result. Need to figure out.

In order to solve this problem, Japanese Patent Laid-Open No. 5-20
Japanese Patent No. 51527 discloses, in a fee collection device that automatically charges by communication between a roadside device and an on-vehicle device, a camera and a vehicle detector, and a communication result between the on-vehicle device and the roadside device on the roadside device side. Is disclosed, and if it is not appropriate, a technique corresponding to a communication result determination device that captures an image of a corresponding vehicle with a camera when the vehicle detector is passed is disclosed. In this technology, communication is performed between the roadside device and the contactless card, the ID number of the contactless card and the remaining amount of money are checked, and when the check result is abnormal, a warning is given and the vehicle is photographed by a camera. To do.

[0005]

However, in the conventional communication result judging device, when the vehicle is in a traveling state such as overtaking in the same lane, a vehicle having an incorrect communication result is regarded as proper, A vehicle with a proper communication result may be regarded as improper.

That is, a plurality of vehicles, for example, a two-wheel vehicle and a four-wheel vehicle, or two-wheel vehicles, run or run in parallel on one traveling path, and one vehicle is connected to the other between the communication area and the vehicle detector. If the vehicle is overtaken, the passing order of the vehicles in the communication area and the arrival detection order of the vehicle detector do not match. In this case, among a plurality of vehicles that travel or run in parallel, one vehicle is a vehicle with a proper communication result (hereinafter referred to as a normal vehicle) and the other vehicle is a vehicle with an incorrect communication result (hereinafter referred to as an abnormal vehicle). Vehicle), the normal vehicle is regarded as an abnormal vehicle and the abnormal vehicle is regarded as a normal vehicle.

In consideration of the above facts, the present invention makes it possible to determine the quality of the communication result of the communication performed between the vehicle-mounted device and the roadside device regardless of the running state of the vehicle and the size of the vehicle. The purpose is to obtain a determination device.

[0008]

In order to achieve the above object, a communication result judging device of the present invention is provided on a traveling road where a plurality of vehicles can run in parallel or on a traveling road where vehicles can enter from adjacent traveling roads. In the defined communication area, the communication position between the vehicle-mounted device mounted on the vehicle and the roadside device installed on the roadside is used to detect the communication position in the width direction of the traveling path of the vehicle within the communication area. A communication position detecting means, and an arrival position detecting means provided at a predetermined distance from the communication area to detect the arrival of the vehicle and to detect the position of the arrived vehicle in the width direction of the traveling path,
Based on a correspondence relationship in which the communication position in the width direction of the traveling path of the vehicle as a result of detection by the communication position detecting means and the position in the width direction of the traveling path of the arrival vehicle as a result of detection by the arrival position detecting means are associated with each other. And a determination unit that determines whether the communication result of the communication performed in the communication area is good or bad.

Further, the communication area of the communication position detecting means and the arrival position detecting means may be provided so as to be separated by a distance corresponding to the size of the vehicle.

Further, the communication area of the communication position detecting means is set to a common position on the traveling road regardless of the size of the vehicle, and the arrival detecting means corresponds to the size of the vehicle from the communication area. They can be provided separated by the distance.

According to the present invention, the communication area is defined on the traveling road on which a plurality of vehicles can run side by side. Alternatively, the communication area is defined on a traveling road where vehicles can enter from adjacent traveling roads. In this communication area, communication is performed between the vehicle-mounted device mounted on the vehicle and the roadside device installed on the roadside. The communication position detecting means detects the communication position in the width direction of the traveling path of the vehicle within the communication area by this communication. That is, the communication by the vehicle-mounted device is performed at the position mounted on the vehicle, and the communication position corresponds to the position on the traveling path of the vehicle. Since the communication is performed in the communication area, if the communication area is divided into a plurality of areas and the communication is performed in each area, the communication position in the width direction of the traveling path of the vehicle can be detected by the communication. When the vehicle-mounted device is separately provided with the antenna, the position of the vehicle-mounted device on the vehicle is the installation position of the antenna.

The arrival position detecting means is provided at a predetermined distance from the communication area and detects the arrival of the vehicle and the position of the arrived vehicle in the width direction of the traveling path. To detect the position of the arrived vehicle in the width direction of the traveling path,
There are optical position detection and magnetic position detection, and there is contact-type position detection using a footboard or the like.

When the communication position in the traveling road width direction by the communication position detecting means and the position in the traveling road width direction by the arrival position detecting means match, the same vehicle is from the communication position detecting means to the arrival position detecting means. It can be estimated that the vehicle has traveled, and if they do not match, it can be estimated that a different vehicle has been replaced. Therefore, the determination means associates the communication position in the width direction of the traveling path of the vehicle, which is the detection result of the communication position detecting means, with the position of the arrival vehicle in the width direction of the traveling path, which is the detection result of the arrival position detecting means. Based on, the quality of the communication result of the communication made in the communication area is determined. That is, if the communication positions in the width direction match, the communication result is considered to be appropriate, and if they do not match, the communication result is considered to be incorrect. As a result, it is possible to reliably perform processing that should be considered for a vehicle with an incorrect communication result, for example, vehicle imaging processing or guidance processing to a manned gate.

Here, among vehicles, for example, a two-wheeled vehicle and a four-wheeled vehicle have different minimum turning radii. Therefore, the travelable distance in the width direction of the traveling path when traveling between the communication area and the arrival position detecting means also differs. That is, when moving a predetermined distance in the width direction of the traveling road, normally, the two-wheeled vehicle can move by a shorter traveling distance in the traveling direction than the four-wheeled vehicle. Therefore, if the distance between the communication area and the arrival position detecting means is set to a constant distance, for example, a four-wheel vehicle as a reference regardless of the size of the vehicle, the communication result may be appropriate depending on the vehicle, but is not appropriate. The vehicle may be regarded as a proper vehicle, or the vehicle may be regarded as a proper vehicle in spite of an incorrect communication result. For example, a two-wheeled vehicle travels behind a four-wheeled vehicle, and after the four-wheeled vehicle has normally completed communication, this two-wheeled vehicle overtakes the four-wheeled vehicle and communicates in the width direction of the traveling path of the four-wheeled vehicle. When the motorcycle moves to the position, the communication result of the two-wheeled vehicle is considered to be proper regardless of the communication result. The same applies to a traveling state such as overtaking or overtaking when a plurality of two-wheeled vehicles are traveling. Therefore, as described in claim 2, the communication area of the communication position detecting means and the arrival position detecting means are provided so as to be separated by a distance corresponding to the size of the vehicle. The size of the vehicle mentioned here means the distance in the vehicle traveling direction from the position of the vehicle-mounted device to the position of the vehicle body where arrival of the vehicle is detected. By doing so, the distance between the communication area and the arrival position detecting means corresponds to the size of the vehicle. Therefore, when the vehicle travels between the communication area and the arrival position detecting means, it is possible to suppress the error in the communication position detection in the width direction due to the movement in the width direction of the traveling path.

Further, when the communication area and the arrival position detecting means are respectively provided so as to be separated from each other by a distance corresponding to the size of the vehicle, the positions of the communication position detecting means and the arrival position detecting means depend on the size of the vehicle. It will be mixed. Therefore, as described in claim 3, the communication area of the communication position detecting means is set to a common position on the traveling road regardless of the size of the vehicle, and the arrival detecting means corresponds to the size of the vehicle from the communication area. Provide the separated distance. By doing so, the position of the arrival detection means is determined from the communication area in accordance with the size of the vehicle, and the processing after that arrives at the timing when the vehicle arrives at the arrival detection means, for example, the photographing processing of the vehicle or the manned gate. The guidance process can be easily and surely performed on the vehicle.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the drawings. In the present embodiment, the present invention is applied to the determination of the communication result in the road-to-vehicle communication performed between the vehicle-mounted device and the road device in the automatic charging system that automatically performs the charging process for the vehicle traveling on the toll road. It was done. The automatic charging system according to the present embodiment performs radio communication between an on-vehicle device mounted on a vehicle and a roadside device having a flat antenna installed on the ground side of a gate or an intermediate route, It is a system to settle tolls without stopping the vehicle.

In-vehicle device 30 applicable to the present embodiment
(Refer to FIG. 9 for details) As the ground side equipment for exchanging various information with each other, there are an entrance gate of a toll road, an intermediate route immediately before or after a branch point, a service area, and an exit gate. A road machine is installed in. In addition, this Embodiment demonstrates as an example the process with respect to one lane in an exit gate.

As shown in FIG. 2, an arch 116 having an exit antenna 120 (see FIG. 3) composed of a plurality of flat antennas is provided at an exit gate 100 which constitutes a road vehicle.
And an exit antenna control device 132 connected to the exit antenna 120. The exit antenna control device 132 is arranged in the separation band 110, and the exit antenna control device 132 outputs the exit gate information and toll information of the toll road to the vehicle-mounted device 30 mounted on the vehicle via the exit antenna 120. It is possible to communicate by radio communication between them.

The exit gate 100 has one lane 102
And lane 102 includes separation zone 108 and separation zone 1
10 is formed. An arch 116 is disposed from the separation band 108 to the separation band 110 so as to straddle the lane 102, and an exit antenna 120 is mounted on the arch 116 so as to be located immediately above each lane. The exit antenna 120 is connected to the lane 102
This is for transmitting and receiving information to and from a vehicle traveling on.

On the lane 102 on the downstream side of the arch 116, light and dark patterns 142 and 144 are provided at predetermined intervals in order, and line sensors 146 and 148 corresponding to the light and dark patterns 142 and 144 are provided above the lane 102. It is provided in. The light-dark pattern 142 is provided on the road surface such that the dark portions and the light portions each having a predetermined width are alternately located from the separation band 108 to the separation band 110. The line sensor 146 is for linearly detecting the bright / dark pattern 142 from the separation band 108 to the separation band 110. The light-dark pattern 144 and the line sensor 148 are
Since the configuration is similar, the description is omitted.

Further, the separation zone 11 on the downstream side of the arch 116.
A camera 180 for taking an image of the vehicle is installed on the 0.

As shown in FIG. 3, the exit antenna 120
Is composed of flat antennas 117, 118, and 119. These flat antennas 117-119
Are sequentially attached to the arch 116 from the separation band 108 side. As shown in FIG. 4, these flat antennas 117 to 119 are provided in a communication area A for communicating with the vehicle-mounted device.
R, AC, and AL are set respectively. The flat antenna 118 is a main antenna for transmitting and receiving, and a communication area covering the length of the lane 102 in the width direction so that communication with the vehicle is possible regardless of the position of the lane 102 traveling. AC is set. Flat antenna 1
The flat antenna 117 and the flat antenna 119 are sub-antennas for receiving only, and correspond to the flat antenna 117 so that they can communicate only with vehicles traveling near the side edge of the lane 102. The communication area AL that allows communication within a predetermined range on the 108 side is set,
A communication area AR in which a predetermined range on the side of the separation band 110 of the lane 102 can be communicated in association with the flat antenna 119.
Is set. The communication areas AR and AL are set so as to partially or entirely overlap the communication area AC. Communication area Ar composed of communication areas AR, AC, AL by these flat antennas 117 to 119
In ea, the vehicle-mounted device of the vehicle traveling on the lane 102 is contacted.

The above flat antennas 117 to 119
Functions as an element of the communication position detecting means. Lane 1
The position of the vehicle in the width direction of the lane 102 can be classified into three types depending on the type of the antenna that receives the transmission radio wave from the vehicle traveling on 02. That is, the communication area is
It is classified into three types, that is, at least the flat antenna 117, or at least the flat antenna 119 and the flat antenna 118 alone. Therefore, depending on the antenna received, the following [relationship]
Thus, the position of the vehicle can be detected.

[Relationship] Reception in the communication area AL: Position in the left area in the traveling direction of the vehicle in the lane Reception only in the communication area AC: Position in the central area of the lane Reception in the communication area AR: Travel of the vehicle in the lane The position of the right area toward the direction

Although the flat antenna has been described as being composed of the main antenna for transmitting and receiving and the sub antenna for receiving only, an antenna for transmitting and receiving to each antenna may be used.

Further, in the present embodiment, each predetermined range of the communication area set in the flat antennas 117 and 119 includes the width of the lane 102 in which the length in the width direction of the lane 102 is approximately ⅓. It is preferable to set to. With this setting, the flat antennas 117, 119
It is possible to substantially equalize the communication area with the communication area with the flat antenna 118. In addition, although the case where the exit antenna is composed of three flat antennas has been described in the present embodiment, it may be composed of two or four or more.

Next, the light / dark pattern 142 and the line sensor 146, and the light / dark pattern 144 and the line sensor 148 are used to detect the arrival of the vehicle and the position of the lane in the width direction at the time of arrival. It functions as an element of the position detecting means. Next, the operation principle of the arrival detection of the vehicle and the position detection in the width direction of the lane at the time of arrival will be described.

As shown in FIG. 5, on the lane 102, a so-called striped light / dark pattern 142 having a predetermined width in the traveling direction of the vehicle.
Is drawn. Light-dark pattern 14 of this lane 102
If no vehicle is on the line 2, the line sensor 1
Reference numeral 46 alternately detects a dark portion and a bright portion of the light / dark pattern 142. That is, the line sensor 146 scans and detects from one side of the light / dark pattern 142 in a predetermined direction (direction of arrow B in FIG. 5) for a certain period of time, so that each of the dark portion and the bright portion is detected as shown in FIG. 6 (1). A rectangular signal having a signal amplitude corresponding to the brightness is output. Thus, the output signal from the line sensor 146 is a regular signal.

When a vehicle of a bright color such as white (hereinafter referred to as a bright vehicle) enters the bright / dark pattern 142,
As shown in FIG. 6 (2), the output signal from the line sensor 146 has an irregular portion with a large signal level according to the position where the light-colored vehicle has entered. When a dark vehicle such as black (hereinafter referred to as a dark vehicle) enters the bright / dark pattern 142, as shown in FIG.
The output signal from the line sensor 146 has an irregular portion where the signal level is small depending on the position where the dark vehicle has entered. The disturbance of the signal obtained from these light / dark patterns 142 corresponds to the vehicle width and the approach position of the approaching vehicle. That is, the scanning time t1 corresponds to the vehicle width. Also,
Referring to the first bright portion p on the separation band 108 side of the light and dark pattern 142 as a reference, the elapsed time t3 from the center time t2 of the light portion p to the center time t3 of the scanning time t1 is equal to the separation band 10
8 corresponds to the distance of the vehicle. As described above, the width and the position of the approaching vehicle can be detected based on the output signal from the line sensor 146.

By thus detecting the irregular portion (disorder) of the output signal of the regular line sensor, the vehicle width and the approach position of the entering vehicle can be detected regardless of the color of the vehicle.

In addition, a plurality of vehicles on the light / dark pattern 142,
For example, when a light-colored vehicle and a dark-colored vehicle enter, FIG.
As shown in (1), the output signal from the line sensor 146 has an irregular portion where the signal level is small and an irregular portion where the signal level is large according to the positions where the light-colored vehicle and the dark-colored vehicle have entered. Therefore, from the disturbance of the signal obtained from the light-dark pattern 142, the number of approaching vehicles, the width of each vehicle, and the approaching position can be detected. The number of approaching vehicles can be detected from the number of irregular portions included in the signal. Fig. 6 (4)
In the example, the number of approaching vehicles is 2 for light-colored vehicles and dark-colored vehicles.
It can be detected that the vehicle width of the light-colored vehicle is ta and the entry position tb, and the vehicle width of the dark-colored vehicle is tc and the entry position td.

Since the operations of the light and dark pattern 144 and the line sensor 148 are the same, the description thereof will be omitted.

Further, in this embodiment, the communication area is set to be commonly used for all vehicles. Further, the interval and the installation position of the light / dark pattern 142 and the light / dark pattern 144 are set according to the size of the vehicle. In the present embodiment, a standard vehicle length is used as the vehicle size. That is, the distance between the communication area and the light / dark pattern 142 is set so as to correspond to the vehicle length of the two-wheel vehicle, and the distance between the communication area and the light / dark pattern 144 of a standard four-wheel vehicle such as a passenger vehicle. It is set to correspond to the vehicle length. Note that the distance from the position of the vehicle-mounted device to the site where the arrival of the vehicle is detected may vary depending on the installation position of the vehicle-mounted device and the type of vehicle with the same number of wheels. The distance in the vehicle traveling direction from the position of the vehicle-mounted device to the position of the vehicle body where arrival of the vehicle is detected can also be associated. For example, in a vehicle such as a four-wheeled vehicle whose outer circumference is covered, the distance in the vehicle traveling direction to the vicinity of the tip of the vehicle body is set to the distance in the vehicle traveling direction to the vicinity of the tip (outer periphery) of the front tire in the traveling direction of a front wheel tire. Can be adapted. Therefore, the distance between the communication area Area and the light / dark pattern 144 is set so as to correspond to the size of a standard four-wheel vehicle such as a passenger car, and the distance between the communication area Area and the light / dark pattern 142 is set. The distance is set to be shorter than that of a four-wheel vehicle so as to correspond to the size of a two-wheel vehicle. The size of the vehicle when the arrival of the vehicle is detected by a contact method such as a tread is the horizontal distance in the vehicle traveling direction from the road surface ground contact portion of the front wheels to the vehicle-mounted device. In addition, the distance from the position of this vehicle-mounted device to the position of the vehicle body where the arrival of the vehicle is detected is stored in advance in the vehicle-mounted device as vehicle information, and this vehicle information is transmitted to the roadside device, and the communication result of the roadside device is transmitted. It may be used when determining pass / fail.

As shown in FIG. 7, a roadside device as a ground-side device for a vehicle traveling in the lane 102 includes an exit antenna 120, line sensors 142 and 144, and a camera 18.
0 and the exit antenna controller 132. The exit antenna control device 132 has CPUs 172, R
AM174, ROM176 and input / output port (I / O)
It is composed of a microcomputer 178, which are connected by a bus 180 so that commands and data can be exchanged. The ROM 176 stores a processing routine described later. I / O port 17
8, the flat antenna 117 of the exit antenna 120 is connected via a transmission / reception control device 152, which will be described later, the exit antenna 118 is connected via a transmission / reception control device 154, and the exit antenna 11 is connected via a transmission / reception control device 156.
9 is connected. In addition, the input / output port 178 has
The line sensor 142 is connected via a driver 162 for amplifying the detection signal and converting it into a digital signal, and the line sensor 144 is connected via a driver 164. Further, the camera 180 is connected to the input / output port 178 via the driver 166.

Next, the transmission / reception control devices 152, 154, 156 that perform transmission / reception processing for the exit antenna 120 will be described. To simplify the description, the transmission / reception control device 154 connected to the flat antenna 118 will be described as an example.

As shown in FIG. 8, the flat antenna 11
8 is composed of a transmitting antenna 22 and a transmitting / receiving antenna 26. The transmission / reception control device 154 includes a signal processing circuit 12 that processes a signal according to data and commands input / output from the input / output port 178. The signal processing circuit 12 is connected to a transmission circuit 14 that transmits a data signal (communication request signal) including an instruction. The transmission circuit 14 is connected to a transmission antenna 22 via a mixer 18. The mixer 18 is connected to a carrier generation circuit 20 for generating a carrier having a predetermined frequency. The mixer 18 mixes a signal input from the transmission circuit 14 and a carrier input from the carrier generation circuit 20, and Modulates the carrier wave input from the carrier wave generation circuit 20 with the signal input from. The modulated wave is transmitted from the transmitting antenna 22 as a radio wave. The carrier wave generation circuit 20 is connected to a transmission / reception circuit 24 that extracts a data signal from a modulated wave that is modulated and returned from the on-vehicle device 30 and received by the transmission / reception antenna 26. This transmission / reception circuit 24 is connected to the signal processing circuit 12.

The transmission / reception control devices 152 and 156 connected to the flat antennas 117 and 119 have the same configurations as those described above, and therefore the description thereof will be omitted. Further, since the flat antennas 117 and 119 are antennas that perform only reception, the transmission / reception circuits of the transmission / reception control devices 152 and 156 may be configured by only reception circuits.

The entrance gate, the midway route and the on-road machines installed in the service area have the same structure as the exit gate, and can be connected to a central computer (not shown). As described above, by connecting each on-road unit to the central computer (not shown), information on vehicles entering the toll road, route information indicating what route the vehicle has traveled, and It is possible to manage tollgate information indicating that charging has been performed in an integrated manner.

The exit gate 100 may be provided with a conventional tollgate box for paying tolls manually. Further, a pass ticket issuing device may be provided at the entrance gate.

Further, a traffic signal is provided on the downstream side of the arch 116 in the traveling direction of the vehicle to instruct whether or not to enter the lane connected to the exit gate control device 132, and when the vehicle can enter the lane. Can be displayed (for example, a green light) or when the entry is impossible (for example, a red traffic light).

As shown in FIG. 9, the vehicle-mounted device 30 mounted on the instrument panel of the vehicle 90 for communicating with the above-described road device.
Is provided with an IC card read / write device 60 in which an IC card 62 in which information on the remaining amount of money and the like are stored can be attached and detached.
The in-vehicle device 30 includes a storage circuit 48 storing fixed data such as an ID code including a vehicle number and vehicle type information, and refers to charge balance information of an IC card 62 mounted by an IC card read / write device 60. Or writes the remaining charge information to the IC card 62.

In detail, the vehicle-mounted device 30 has a receiving antenna 32 for receiving the signal transmitted from the on-road device.
The reception antenna 32 is connected to a detection circuit 34 that detects a modulated wave received by the reception antenna 32 and obtains a data signal. The detection circuit 34 is connected via a data signal receiving circuit 44 to a signal processing circuit 46 including a microcomputer.

The signal processing circuit 46 stores a charge balance information indicating a balance for collecting a charge, a storage circuit 48 for storing data such as an ID code and vehicle type information indicating a vehicle type of a vehicle equipped with the data, and a data signal including an ID code. Is connected as a response signal. The transmission circuit 50 modulates the inquiry signal, which is an unmodulated carrier wave received by the transmission / reception antenna 52, with the data signal from the signal processing circuit 46 and transmits / receives the signal. Return via 52. The signal processing circuit 46 is connected to an IC card read / write device 60 to which an IC card 62 can be attached and detached.

The mounting position (mounting position) of the vehicle-mounted device 30
Is not limited to the instrument panel of the vehicle as described above, but may be any position as long as the antenna can communicate with the on-road unit, and may be, for example, in a vehicle such as a rear seat. Further, the in-vehicle device 30 may have a separate configuration including the in-vehicle device body and the antenna. When the in-vehicle device main body and the antenna are configured separately as described above, only the antenna can be installed on the instrument panel or at a position in the direction of the rear seat as described above, and the mounting position information indicates that the antenna is It shall be registered for the installed position.

Further, the vehicle-mounted device is always supplied with power from the vehicle-mounted battery when the ignition is turned on.

Next, the processing routine of this embodiment will be described. As shown in FIG. 10, in the vehicle-mounted device mounted on the vehicle, the determination as to whether or not the inquiry signal is received in step 420 is repeated until the vehicle 90 reaches the communication area and receives the inquiry signal from the roadside device, When received, the inquiry signal received in the next step 422 is used as a carrier wave, and an ID code which is an identification code including vehicle type information for identifying the own vehicle is used as a carrier wave, and a modulated wave obtained by modulating the carrier wave with the charge balance information of the vehicle-mounted device 30 is a response signal. To send as. When this transmission is completed, step 4 is repeated until the next signal is received from the road device.
The determination as to whether or not the signal of 24 has been received is repeated, and if it is determined that the signal has been received, communication with the roadside machine is started in the next step 426.

As shown in FIG. 11, the roadside machine installed at the exit gate transmits an inquiry signal composed of a continuous wave in step 300, and determines in step 302 whether or not a response signal from the vehicle-mounted machine is received. To do. When a response signal from the vehicle-mounted device is received and an affirmative determination is made in step 302, the receiving position of the antenna of the vehicle-mounted device 30 is detected from the type of the flat antenna that has received the response signal in the next step 304. Thereby, the position of the vehicle can be detected. In the present embodiment, as described above, three types of regions can be detected depending on the type (combination) of received flat antennas 117 to 119. The detected vehicle position is stored as the vehicle position S ₁ . After that, in the next step 306, communication with the vehicle-mounted device of the vehicle at the vehicle position S ₁ is performed, and when the communication is completed, the process proceeds to the next step 308.

On the other hand, if a negative determination is made in step 302 without receiving the response signal from the vehicle-mounted device, step 30
Proceed to 8.

Next, in step 308, the line sensor 14
The output signal of No. 6 is read, and in the next step 310, it is determined whether or not the read output signal is disturbed. If there is no disturbance, the vehicle has not arrived yet, so it is determined in the next step 312 whether or not communication with the vehicle has already ended. If the communication is over,
Since the vehicle is located between the communication area and the light / dark pattern 142, an affirmative decision is made in step 312, and step 3
Returning to 08, the output signal of the line sensor 146 is read. On the other hand, if the communication has not ended, the vehicle has not reached the communication area yet, so a negative determination is made in step 312, and the process returns to step 300 to transmit the inquiry signal.

In this way, the arrival of the vehicle is detected by transmitting the inquiry signal and detecting the output signal of the line sensor 146 until the response signal from the vehicle-mounted device is received. This makes it possible to detect the arrival of a vehicle that does not have an in-vehicle device or a vehicle in which the in-vehicle device is not working.

In the next step 314, it is determined whether or not the communication between the roadside machine and the vehicle has already been completed. This determination is a determination for processing branching when a vehicle not equipped with an in-vehicle device or a vehicle in which the in-vehicle device is malfunctioning passes through the communication area and reaches the light / dark pattern 142. If the communication is not completed, a vehicle not equipped with an on-vehicle device or a vehicle in which the on-vehicle device is not operating has passed the communication area and reached the light-dark pattern 142. Therefore, the communication between the on-road device and the vehicle is performed. It is determined that the communication result is not normally terminated (NG), the process proceeds to step 334, and the vehicle is photographed by the camera 180 as the NG process. As the NG process, the signal may be changed from blue to red in order to prohibit the entry of the following vehicle.

On the other hand, if the communication is completed, an affirmative decision is made in step 314, and in the next step 316, the vehicle width w ₁ and the arrival vehicle of the arriving vehicle are determined from the output signal of the line sensor 146 as explained above. Find the position S _a . In the next step 318, it is determined whether or not it is a four-wheel vehicle by determining whether or not the obtained vehicle width w ₁ exceeds the standard vehicle width w _s of a two-wheel vehicle stored in advance. In the present embodiment, since there are three types of communication positions detected in the communication area Area, it is preferable to classify the position S _{a of the} arriving vehicle into three corresponding positions.

If w ₁ ≤w _s and a negative determination is made in step 318, the position S _a of the arriving vehicle detected from the output signal of the line sensor 146 in step 328 is used as the position S for determining the communication result. _It is stored as ₂ , and the process proceeds to step 330.

If w ₁ > w _s and the affirmative judgment is made in step 318, the output signal of the line sensor 148 is read in the next step 320, and whether the output signal read in the next step 322 is disturbed or not. To judge. If there is no disturbance and a negative determination is made, the vehicle has not yet arrived at the light / dark pattern 144, and therefore the process returns to step 320. On the other hand, if the output signal is disturbed and a positive determination is made, the vehicle width w ₂ and the position S _{b of the} arriving vehicle are obtained from the output signal of the line sensor 148 in the next step 324, and the vehicle arrives in the next step 326. The vehicle position S _b is stored as the position S ₂ for determining the communication result, and the process proceeds to step 330.

As described above, in this embodiment, the position for detecting the arrival of the vehicle is switched according to the type of the vehicle such as the two-wheeled vehicle or the four-wheeled vehicle, and the lane of the vehicle at the switched position is changed. The position in the width direction is stored as the position S ₂ for communication result determination.

Next, at step 330, the vehicle position S at the time of communication by judging whether S ₁ = S ₂ or not is determined.
_It is determined whether 1 matches the vehicle position S ₂ at the time of detecting the arrival. At the same time, in step 330, the vehicle width determined by the vehicle type information obtained by the communication is compared with the vehicle width obtained from the output signal of the line sensor, and it is determined whether or not they match. If S ₁ = S ₂ and the vehicle widths match or substantially match and a positive determination is made in step 330, the communication result indicating that the communication between the roadside machine and the vehicle has ended normally is good (OK). Then, the process proceeds to the next step 332, and as an OK process, a post-process for this vehicle, for example, a normally passing vehicle is recorded. This step 3
In 30, the vehicle position S ₁ at the time of communication and the vehicle position S at the time of arrival
_{When 2} does not match, or when the vehicle width obtained during communication and the vehicle width obtained upon arrival do not match, a negative determination is made. That is, a vehicle in which the vehicle position at the time of communication and the vehicle position at the time of arrival do not match is assumed to be a vehicle that was meandering or overtaking, and is likely to be an abnormal vehicle whose communication result should be denied. . Further, a vehicle in which the vehicle width obtained at the time of communication does not match the vehicle width obtained at the time of arrival is highly likely to be an abnormal vehicle for which the communication result of the information exchanged at the time of communication is not optimum. Therefore, when a negative determination is made in step 330, it is determined that the communication result in which the communication between the roadside device and the vehicle is not normally completed is negative (NG), the process proceeds to step 334, and the camera 180 is executed as an NG process. Take a picture of this vehicle.

By doing so, when the vehicle 90A, which is a four-wheel vehicle, and the vehicle 90B, which is a two-wheel vehicle, run in parallel as shown in FIG. 1, the vehicle-mounted device of the vehicle 90A in the communication area Area. The communication position of the vehicle 90A is detected as the central portion by the communication between the 30A and the flat antenna, and the communication position of the vehicle 90B is detected as the right edge portion in the traveling direction on the traveling lane by the communication between the vehicle-mounted device 30B and the flat antenna. . At this time, the vehicle type information is obtained from the roadside machine. After that, the line sensor 148 detects the arrival, width and arrival position of the vehicle 90A. Next, the vehicle 90
The communication position and the arrival position of A are compared with each other, the vehicle type information and the vehicle width are compared with each other, and the communication result and the detection result at the arrival time point are associated with each other.
On the other hand, the vehicle 90B arrives by the line sensor 146,
The vehicle width and arrival position are detected. Next, the communication position and the arrival position of the vehicle 90B are compared with each other, the vehicle type information and the vehicle width are compared with each other, and the communication result and the detection result at the arrival time are made to correspond to each other. There is. If the communication result is negative, the vehicle is photographed by the camera 180.

For this vehicle 90A, the arrival and the arrival position detected by the line sensor 146 are ignored. On the other hand, for the vehicle 90B, the line sensor 148
Arrivals and arrival positions detected by are ignored. Switching the detection by the line sensor depending on the type of vehicle is to avoid detection depending on the type of vehicle even during communication with the roadside machine. That is, the detection by the line sensor 146 is used for a two-wheel vehicle, and the detection by the line sensor 148 is used for a four-wheel vehicle. Therefore, since the distance between the communication area and the detection position of the line sensor is determined according to the type of vehicle, the distance between them becomes large and the error in arrival position detection due to the movement of the lane in the width direction can be suppressed.

That is, as shown in FIG.
The distance between the communication area for the wheeled vehicle and the detection position of the line sensor 148 (bright / dark pattern 144) is the vehicle 90A.
Is set to a predetermined standard distance that can be reliably detected after passing through the communication area Area. However, the line sensor 148 at the set position causes 2
When trying to detect the wheeled vehicle 90B, as shown in FIG. 12 (2), the vehicle 90B can move from the center position, which is the communication position at the end of communication, to the side edge of the lane. In this case, even if the vehicle 90B normally ends the communication, there is a possibility that it will be determined to be no. Therefore, in the present embodiment, the distance between the communication area for the two-wheeled vehicle and the detection position of the line sensor is determined by the vehicle 90B in the communication area A.
The line sensor 146 (bright / dark pattern 142) is set to a predetermined standard distance so that the line sensor 146 (light / dark pattern 142) can be surely detected immediately after passing through the rea. The line sensor 146 set for the two-wheeled vehicle detects when the four-wheeled vehicle 90A is communicating, as shown in FIG. 12 (3). Therefore, in the present embodiment, the arrival and the arrival position detected by the line sensor 146 are ignored for the vehicle 90A. Therefore, even when the length of the tip portion of the vehicle from the vehicle-mounted device of the vehicle corresponding to the vehicle width is different,
The communication result and the detection result of the arrival of the vehicle can be surely associated with each other.

As described above, in the present embodiment, the vehicle position is detected from the communication position obtained by the communication between the on-road unit and the on-vehicle unit, the vehicle type information is received, and the arrival of the vehicle from the output signal of the line sensor, Detects the arrival position and vehicle width,
The position of the vehicle and the arrival position according to the communication position are associated with each other. Further, the vehicle width of this vehicle and the vehicle width detected upon arrival are associated with each other. Therefore, even a vehicle that has been interrupted by overtaking or changing lanes can be reliably detected, and appropriate processing for these vehicles can be performed.

Further, the communication result and the arrival position can be associated with each of the vehicles running in parallel, and appropriate processing can be performed on these vehicles.

In the above embodiment, the case where the flat antenna communicates with the vehicle-mounted device has been described. However, in order to detect the ID information and the like from the vehicle-mounted device, a pre-antenna is installed separately from the flat antenna on the upstream side of the lane. However, the information for communication may be exchanged by this pre-antenna.

In the above embodiment, the case where the present invention is applied to the toll road has been described, but the present invention is not limited to the toll road, and a parking lot for automatically paying a parking fee is provided. It can be applied to automatic billing systems such as systems. In addition, the present invention is not limited to a system that automatically performs a billing process, and can be applied to a system that exchanges information between at least a ground-side facility having an antenna and a vehicle having an on-vehicle device.

[0064]

As described above, according to the invention described in claim 1, the communication position detecting means detects the communication position in the width direction of the traveling road, and the arrival position detecting means detects the traveling road of the vehicle. Since the position in the width direction is detected and the determination means determines the quality of the communication result from the correspondence relationship in which the position in the width direction of the traveling path of the vehicle of each detection result is correlated, the traveling state such as overtaking between vehicles Also, there is an effect that it is possible to reliably determine the quality of the communication result of the communication performed between the vehicle-mounted device and the road device regardless of the size of the vehicle.

According to the second aspect of the present invention, the communication area of the communication position detecting means and the arrival position detecting means are provided so as to be separated by a distance corresponding to the size of the vehicle. There is an effect that it is possible to suppress the error of the arrival position which differs depending on the size.

According to the invention described in claim 3, regardless of the size of the vehicle, the communication area of the communication position detecting means is set to a common position on the road, and the arrival detecting means determines the size of the vehicle from the communication area. Since they are provided at a distance corresponding to, the position of the vehicle arriving at the arrival detection means can be determined in correspondence with the size of the vehicle, and the position of the vehicle requiring processing can be easily specified. , Is effective.

[Brief description of drawings]

FIG. 1 is an image diagram showing a relationship around an exit antenna of a road vehicle of a vehicle.

FIG. 2 is a schematic perspective view showing an exit gate in the automatic charging system according to the present embodiment.

FIG. 3 is a perspective view showing a configuration of an exit antenna.

FIG. 4 is an image diagram showing a communication area by each flat antenna that constitutes an exit antenna.

FIG. 5 is a diagram showing a light-dark pattern for explaining detection of arrival of a vehicle.

FIG. 6 is a time characteristic diagram showing an output signal of a line sensor for explaining detection of arrival of a vehicle.

FIG. 7 is a block diagram showing a schematic configuration of a road machine.

FIG. 8 is a block diagram showing an example of a transmission / reception control device that performs transmission / reception processing with an exit antenna of a roadside machine.

FIG. 9 is a block diagram showing an in-vehicle device.

FIG. 10 is a flowchart showing a processing routine on the in-vehicle device side.

FIG. 11 is a flowchart showing a processing routine on the roadside device side.

FIG. 12 is an image diagram in the vicinity of an exit antenna of a road machine for explaining that the line sensor is switched according to the type of vehicle.

[Explanation of symbols]

 100 Exit Gate 117 Flat Antenna 118 Flat Antenna 119 Flat Antenna 132 Exit Antenna Control Device 146 Line Sensor 148 Line Sensor

Claims (3)

[Claims] 1. A vehicle-mounted device mounted on a vehicle and a roadside installed in a communication area defined on a traveling road in which a plurality of vehicles can run in parallel or on a traveling road in which vehicles can enter from adjacent traveling roads. Communication position detecting means for detecting a communication position in the width direction of the traveling path of the vehicle in the communication area by communication with the on-road machine, and the vehicle provided at a predetermined distance from the communication area. Arrival position detection means for detecting the arrival of the vehicle in the width direction of the traveling path, and arrival position detection means for detecting the position of the vehicle in the width direction of the traveling path detected by the communication position detection means. Judgment of the quality of the communication result of the communication performed in the communication area based on the correspondence relationship in which the position of the arrival vehicle in the width direction of the traveling path is detected by the arrival position detecting means. Communication result determination apparatus having a means. 2. The communication area of the communication position detecting means and the arrival position detecting means are provided so as to be separated from each other by a distance corresponding to the size of the vehicle. The communication result determination device described. 3. The communication area of the communication position detecting means is set to a common position on the traveling road regardless of the size of the vehicle, and the arrival detecting means corresponds to the size of the vehicle from the communication area. The communication result determination device according to claim 2, wherein the communication result determination device is provided at a distance.