JP3402812B2 - Vehicle identification system - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle identification system in a toll collection system using wireless communication. 2. Description of the Related Art A conventional general vehicle discriminating system has a configuration in which a vehicle type discriminating device and a roadside antenna are provided on a vehicle approach side, and a vehicle detecting sensor is provided thereafter. With such a configuration, a configuration as shown in FIG. 7 has been proposed in order to perform more accurate determination. FIG. 7 is a schematic layout diagram of a main part of such a conventional toll collection system. In the figure, lane 2
0 entering side, and respectively to the starting side entry side, the originating vehicle detection sensors 10 and 11 are arranged, an example in which the communication area 13 of the roadside antenna 12 with the in-vehicle device 8 between them. Roadside antenna 12 is disposed above the lane 20 as the communication area 13 comes between the entrance-side vehicle detection, start-side vehicle detection sensors 10 and 11. The communication area 13,
It is assumed that the roadside antenna 12 and the in-vehicle device 8 have a sufficient traveling direction length so that the toll is paid by wireless communication while the vehicle 7 is traveling. [0004] In such an arrangement, the operation when the vehicle 7 on which the on-vehicle device 8 is mounted now enters the lane 20 will be described. (1) When the vehicle 7 enters the lane 20, the entry of the vehicle 7 is detected by the approaching vehicle detection sensor 10, and the control device 14 transmits the inquiry data for communication with the on-vehicle device 8 from the roadside antenna 12 periodically. Output. (2) When the vehicle-mounted device 8 mounted on the vehicle 7 reaches the communication area 13 of the roadside antenna 12, the vehicle-mounted device 8 returns a response to the roadside antenna 12, so that the control device 14 Is detected, and a communication sequence for performing a fee payment process is executed. (3) The vehicle 7 is a starting vehicle detection sensor 11
Is completed, the vehicle detection sensor 11 detects the completion of the passage of the vehicle 7 and notifies the control device 14. When the vehicles 7 enter the lane one by one and start moving in the lane 20 having this configuration, the starting vehicle detection sensor 1
By determining whether or not the payment processing by wireless communication has been performed by the time when the passage of 1 is completed, it is possible to determine whether or not the passing vehicle has correctly paid the toll by wireless communication. FIG. 8 is a processing flow of the control device 14 in this case. In the figure, at S1, the approaching vehicle detection sensor 1
0 that by the passage start is detected. Next, in S2,
Interrogation data is periodically output by the roadside antenna 12. At S3, the vehicle is waiting for entry into the communication area 13, that is, waiting for a response from the vehicle-mounted device 8. Next, in S4, there is a response from the vehicle-mounted device 8, and in S4-1,
By wireless communication between the onboard unit 8 and the roadside antenna 12,
A charge payment process is performed, and in S4-2, the completion of passing of the vehicle is detected by the transmitting-side vehicle detection sensor 11, and the process proceeds to S4-2.
It is determined that the vehicle 7 that has passed the lane in 3 has correctly paid the fee by wireless communication. Further, in S5, when there is no response from the on-vehicle device 8, when the start-side vehicle detection sensor 11 detects the completion of passing of the vehicle, it is determined in S6 that the passing vehicle has not paid the fee. FIGS. 9A and 9B are timing charts of vehicle detection. FIG. 9A shows an example of a vehicle equipped with a vehicle-mounted device, and FIG. 9B shows an example of a vehicle not equipped with a vehicle-mounted device. In (a), between the passage start detection time T1 and the passage completion detection time T2, the roadside antenna-on-vehicle device communication processing 21 is performed, and the payment processing 22 by wireless communication occurs. It can be seen that the fee was correctly paid for this vehicle. [0011] In FIG. 9 (b), there is no roadside antenna vehicle-mounted device communications processing 2 1 during passage completion detection time T2 than the pass start detection time T1, no payment processing occurs by the wireless communication Therefore, it is understood that the toll has not been correctly paid for this vehicle at the time of detection of the completion of passage. [0012] As described above, when an attempt is made to construct a toll collection system using wireless communication, it is determined whether or not the toll has been correctly paid by wireless communication for each vehicle. Judgment is required. As shown above, FIG.
In the example of, when vehicles enter and exit the lane one by one, it can be determined whether or not payment processing by wireless communication has been performed for each passing vehicle. However, in the case where a plurality of vehicles are staying in a lane and congested, in this configuration, it is not possible to determine whether or not payment processing by wireless communication has been performed for each passing vehicle. Such an example will be described with reference to FIG. FIG. 10 shows a case in which two vehicles, that is, a vehicle A without the in-vehicle device 8 and a vehicle B with the in-vehicle device 8 are running close to each other in the lane. In the figure, the roadside antenna is omitted for simplicity. In such a case, vehicle A does not perform communication, but vehicle B performs communication when vehicle-mounted device 8 enters communication area 13. However, considering the timing chart in the same manner as in the example of FIG. 9, it is as shown in FIG. 11, and it is indistinguishable whether the vehicle having communicated is the vehicle A or the vehicle B. That is, in FIG. 11, it is possible to detect the entry and the completion of the passage of each of the two vehicles, but since the point in time when the payment processing 22 by wireless communication occurs is the point in time when both the vehicles A and B have entered, When the passing of the vehicle is completed, it cannot be determined which vehicle is the vehicle without the on-vehicle device. In order to solve such a problem, the present applicant arranges a communication area between one vehicle detection sensor and a roadside antenna to determine whether communication with a passing vehicle has been correctly performed. Filed separately. However, in this method, when communication is performed with respect to a passing vehicle, it can be immediately determined that the vehicle is equipped with an in-vehicle device. It is known at the time of completion of the passage of the sensor, and is not known until this time. This state will be described with reference to FIGS. FIG. 5 is a communication determination timing chart in a case where two vehicles A and B run and pass by one vehicle detection sensor. Tb represents a period during which the communication of the vehicle B exists, and the determination that the communication with the vehicle B has not been performed is performed when the passage of the vehicle B is completed (at time t). FIG. 6 is an arrangement diagram in the case where the fee collection by wireless communication is combined with the existing fee collection system. 2
0 is a lane, 21 is a long vehicle (16.5 m), 22
Is a vehicle-mounted device mounted on the vehicle 21, 25 is a vehicle detection sensor,
Reference numeral 23 denotes a roadside antenna, and reference numeral 24 denotes a communication area with the vehicle-mounted device 22. Reference numeral 26 denotes an existing toll collection device. In general, the vehicle length of the vehicle 21 passing through the toll road is at most 16.
There about 5 m, with respect to these vehicles 21, at the time capable of discriminating that the communication has not been performed, the tip of the vehicle 21 so that the more the vehicle detection sensor 25, in 16.5m destination. As described above, the vehicle discriminating system in which the communication area 24 of one vehicle detection sensor 25 and the roadside antenna 23 is arranged is installed at an existing toll collection position (for example, an automatic toll ticket issuing machine, an automatic toll collection machine, a booth having a collection staff, etc.). ), It is possible to determine whether or not the toll vehicle 21 has been paid by wireless communication before the vehicle 21 reaches the position of the existing toll collection device 26. In this case, this vehicle discrimination system is
It must be installed 6.5 m before, and it is difficult to extend the island depending on the current tollgate. As described above, the present invention can be installed on the vehicle entry side of the existing toll collection position even when the length of the island is short, and the vehicle entering the vehicle by the time the leading end of the vehicle reaches the existing toll collection position. It is an object of the present invention to provide a discrimination system capable of discriminating that the vehicle is not mounted on a vehicle. [0020] Therefore, in the present invention,
The first and second vehicle detection sensors are arranged in the vicinity of the front and rear of the communication area at intervals equal to or more than a predetermined set value, the antenna control unit is controlled by the determination unit, and the detection is performed by the first and second vehicle detection sensors. It is configured to determine whether or not a fee has been paid by wireless communication based on a signal and a communication result between the vehicle-mounted device and the roadside antenna from the antenna control unit. That is, the present invention provides a roadside antenna installed in a lane for communicating with an onboard unit mounted on a vehicle;
Mounting position of the vehicle device in the near <br/> near before and after the communicable area with the same roadside antenna and the vehicle device, it is arranged in a predetermined value or more intervals defined by the communication processing time and speed, traveling the lane A first vehicle detection sensor and a second vehicle detection sensor that detect passage of the vehicle at a specific position, an antenna control unit that controls communication in a communicable area between the roadside antenna and the vehicle-mounted device, By receiving signals from the first and second vehicle detection sensors and communication result data from the antenna control unit with the in-vehicle device, determining whether a fee has been paid to the passing vehicle by wireless communication. And a discriminating unit for controlling the antenna control unit.
The vehicle detection sensor passes at the vehicle or pass the beginning of the second vehicle detection sensor is in, or the communication up early in one pass completion of the first vehicle sensor is Ryosu <br/> End Wireless communication with each passing vehicle
A vehicle discriminating system for discriminating whether or not a toll payment has been made. According to the present invention, when the first vehicle detection sensor detects that the vehicle has passed by such means, the signal is input to the discriminating section, and the discriminating section instructs the antenna control section to communicate with the roadside antenna. The communication with the on-vehicle device starts within the communicable area. When the vehicle further travels and passes the second vehicle detection sensor, its signal is also sent to the determination unit. In the determination unit, when the vehicle equipped with the on-vehicle device passes the first vehicle detection sensor, the vehicle either starts communication with the second vehicle detection sensor or completes passage of the first vehicle detection sensor. the Rukoto Ryosu always communication completed before an earlier point, to passing vehicles for each one can perform the determination of whether or not payment has been made by the wireless communication. By such an action,
When the vehicle passes through the first vehicle detection sensor, if the vehicle is long, the communication process is executed by the time when the communication of the second vehicle detection sensor of the vehicle starts, and if the vehicle is short, the first vehicle of the vehicle is used. communication process to pass the completion of the detection sensor is performed, according to the wireless communication to the vehicle in these time points
A determination is made that the payment was not made. Therefore, it is reliably determined that the vehicle does not have the in-vehicle device. This operation will be described in more detail with reference to FIGS. An object of the present invention described above is that it is not known whether or not communication has been performed with the vehicle unless the vehicle detection sensor completes the passage of the vehicle. However, if the device location of the vehicle-mounted device is on the front window glass or the front dashboard, it can be considered that the position of the vehicle-mounted device for most vehicles is within 3 m from the front end of the vehicle, and communication processing is started from that position. It does not matter if it is determined at the time of completion that there has been communication with the vehicle. Accordingly, one vehicle detection sensor is added, and after a vehicle having a long vehicle length starts passing through the first vehicle detection sensor, the vehicle is detected by the time when the vehicle starts passing through the second vehicle detection sensor. If there is no communication, it may be determined that communication will not be performed for the same vehicle anymore. FIG. 1 shows the structure of the present invention. Reference numerals 1 and 2 denote vehicle detection sensors, 3 denotes a roadside antenna, 4 denotes a communication area, 5 denotes an antenna control unit, 6 denotes a discrimination unit, and 9 denotes a discrimination unit. A determination result signal output to another device, 7 is a vehicle, and 8 is a vehicle-mounted device mounted on the vehicle. FIG. 2 shows a determination period for communication with a long vehicle. Now, considering the required distance d between the vehicle detection sensors 1 and 2 in FIG. 1, the distance from the vehicle tip to the mounting position of the vehicle-mounted device is m (m: meter), the time required for communication processing is t0 (sec), V
(M / sec); the condition of m + t0.v <d is satisfied. As a specific value, the maximum value of m = 3.0
(M), t0 = 0.06 (sec), maximum value of v = 16.
7 (m / sec) [60 km / h]; 4.0 (m)
<D. In FIG. 1, if d = 4.5 (m), a vehicle having a short length (for example, a mini vehicle) starts passing through the vehicle detection sensor 1 and starts passing through the vehicle detection sensor 2. Since the passage of the vehicle detection sensor 1 is completed before, if the completion of the passage of the vehicle detection sensor 1 is earlier than the passage start time of the vehicle detection sensor 2, the vehicle is determined at that time. FIG. 2 is a timing chart of the communication determination in this case. FIG. 2A shows an example of a case where the vehicle length is long, in which the communication range of the long vehicle B is represented by Tb. determination that payment has not been made by the wireless communication is performed in the communication start time of the vehicle detection sensor 2 of the vehicle B (time point t) against. (B) is an example of the case where the vehicle length is short, and the timing at which the communication of the vehicle B having the short vehicle length is performed is represented by T.
b, the fee for wireless communication for vehicle B
The determination that the money has not been paid is made at the time when the vehicle B has passed the vehicle detection sensor 1 (time t). As described above, the vehicle detection sensor 2 is added, and the communication timing of the vehicle is determined from the completion of the passage of the vehicle detection sensor 1 of the preceding vehicle to the completion of the passage of the vehicle detection sensor 1 or from the completion of the passage of the vehicle detection sensor 1 of the preceding vehicle. with up to whichever occurs earlier passage beginning of vehicle detection sensor 2, even in the long vehicle with vehicle length that does not communicate, no early in
It is possible to determine that the fee has not been paid by line communication. Embodiments of the present invention will be specifically described below with reference to the drawings. The embodiment of the present invention has the same configuration as that of FIG. 1 described in the section of the operation of the present invention, but d = 4.5 in the figure.
m. The specific configuration will be described in further detail. Reference numeral 1 denotes a first vehicle detection sensor which is installed so as to face the lane with one or a plurality of optical sensors. , Detects the completion of passage,
No. 6 is notified. Reference numeral 2 denotes a second vehicle detection sensor installed so as to face the lane, and one or a plurality of optical sensors, which detect the start and completion of passing of the passing vehicle, and notify the determination unit 6. . Reference numeral 3 denotes a roadside antenna, which constitutes a communication area 4 and has a function of communicating with an on-vehicle device 8 mounted on a vehicle 7. Reference numeral 4 denotes a communication area in which the roadside antenna 3 and the vehicle-mounted device 8 can communicate with each other. Reference numeral 5 denotes a roadside antenna control unit, which performs the following operation according to a command from the determination unit 6. (1) In response to a command from the determination unit 6, the transmission and reception of periodic interrogation data for communicating with the on-vehicle device 8 is started and ended. (2) When the in-vehicle device 8 responds to the periodic interrogation data, the in-vehicle device 8 executes a communication process for paying a fee. (3) When the fee payment processing with the in-vehicle device 8 is completed, the result is notified to the determination unit 6. The discriminating unit 6 receives the signals of the vehicle detection sensors 1 and 2, issues a command to the antenna control unit 5, and receives a communication result from the antenna control unit 5, thereby transmitting a radio signal to the vehicle. This is a determination unit that determines whether or not a fee has been paid by communication, and the determination is performed as shown in the processing flowchart of FIG. Reference numeral 9 denotes a determination result signal output by the determination unit 6, which notifies a device separately of whether the vehicle has passed and whether or not the vehicle has performed a fee payment process, and the result thereof. Reference numeral 7 denotes a vehicle passing through the lane, and 8 denotes an in-vehicle device mounted on the vehicle. When interrogation data is received from the roadside antenna 3 in the communication area 4, a response is returned to the antenna 3, and a response to the antenna 3 is made. By performing communication, payment processing of the fee is performed. FIG. 3 is a flowchart of the processing performed by the above-described discriminating unit. The details are as shown in the flowchart, so a detailed description is omitted. In the figure, N is present between the vehicle detection sensor 1 and the vehicle detection sensor 2. This is a counter for counting the number of vehicles to be operated, and is necessary when one or more vehicles enter between two sensors. C is a flag for managing whether or not communication has been performed. Note that the waiting states include those that cannot occur depending on the state at that time, but since such an event does not occur, it does not affect the processing. FIG. 4 is a timing chart for determining communication in this embodiment. This embodiment shows an example in which the front edge of the communication area is located at the position of the vehicle detection sensor, and does not communicate with the vehicle before the vehicle starts passing.
It is possible to determine the passing vehicle at the timings shown in (a) and (b). [0037] in FIG. 4 (a) is a case of long vehicles with vehicle length, the range of communication of the long vehicle B of vehicle length is performed is expressed as Tb, payment by the wireless communication to the vehicle B The determination as to whether or not the vehicle B has been performed is made at the time when the vehicle B passes the vehicle detection sensor 2 (at time t). (B) shows the case of a vehicle with a short vehicle length, and the timing at which communication of the vehicle B with a short vehicle length is represented by Tb.
Radio or payment by communication is performed whether the determination is pass completion of the vehicle detection sensor 1 of the vehicle B with respect to (t
At the time). As described above, according to the present invention, the first and the second vehicle detection sensors are arranged at intervals of a predetermined value or more in the vicinity of the front and rear of the communication area to make a determination. The unit controls the antenna control unit to pay the fee by wireless communication based on the signals detected by the first and second vehicle detection sensors and the communication result between the vehicle-mounted device and the roadside antenna from the antenna control unit. Is determined whether or not the vehicle has passed the first vehicle detection sensor during the communication timing determination period with the vehicle. , Or the communication must be completed by the earliest time when the vehicle passes the first vehicle detection sensor.
And, without mounting the vehicle-mounted device for its, in long vehicles with vehicle length that does not communicate, but the determination of the payment by the wireless communication is not performed is reliably made at an earlier time.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a layout diagram showing a configuration of a vehicle discrimination system of the present invention. FIG. 2 is a timing chart of communication discrimination according to the vehicle discrimination system of the present invention, wherein FIG.
(B) shows the case of a vehicle with a short vehicle length. FIG. 3 is a flowchart of a determination unit in the vehicle determination system according to one embodiment of the present invention. 4A and 4B are timing charts of communication determination in the vehicle determination system according to one embodiment of the present invention, wherein FIG. 4A shows a case of a long vehicle, and FIG. 4B shows a case of a short vehicle. FIG. 5 is a timing chart of communication determination of the vehicle determination system in the case of one vehicle detection sensor. FIG. 6 is a layout diagram of a vehicle discrimination system combined with an existing system in the case of one vehicle detection sensor. FIG. 7 is a layout diagram showing a configuration of a conventional vehicle discrimination system. FIG. 8 is a flowchart of a control device of a conventional vehicle discrimination system. FIG. 9 is a timing chart of vehicle discrimination of a conventional vehicle discrimination system, where (a) is a vehicle equipped with an in-vehicle device, and (b) is a diagram.
Indicates the case of a vehicle not equipped with a vehicle-mounted device. FIG. 10 is a layout diagram of a conventional vehicle discrimination system when a vehicle runs close to the vehicle. FIG. 11 is a timing chart for determining a vehicle when a conventional vehicle is approaching. [Description of Signs] 1, 2 Vehicle detection sensor 3 Roadside antenna 4 Communication area 5 Antenna control unit 6 Discrimination unit 7 Vehicle 8 In-vehicle device 9 Discrimination result signal

Claims (1)

(57) [Claims] [Claim 1] A roadside antenna installed in a lane for communicating with a vehicle-mounted device mounted on a vehicle, and before and after a communicable area between the roadside antenna and the vehicle-mounted device. A first vehicle detection sensor that is disposed in the vicinity at an interval equal to or greater than a predetermined value determined by the mounting position of the on-vehicle device, a communication processing time, and a vehicle speed, and detects passage of the vehicle traveling in the lane at a specific position; A vehicle detection sensor, an antenna control unit that controls communication between the roadside antenna and the vehicle-mounted device in a communicable area, a signal from the first and second vehicle detection sensors, and a vehicle mounted from the antenna control unit. A determination unit that determines whether or not a fee has been paid by wireless communication to the passing vehicle by receiving communication result data with the device. Said Ann When the vehicle equipped with the in-vehicle device passes through the first vehicle detection sensor, the vehicle starts to pass through the second vehicle detection sensor or when the vehicle completes passing through the first vehicle detection sensor. by any earlier point in time until the communication is complete Ryosu Rukoto, fee payment by wireless communication to the passage vehicle in each one
Vehicle discrimination system which is characterized in that the determination of whether or not have has been performed.