JPH0773350A - Toll collection system for automobile and identification system for automobile - Google Patents

Abstract

PURPOSE:To provide a toll collection system for automobile for a toll road or a toll parking lot to be easily realized by using license plate information as automotive identification information and to provided a identification system for automobile to be used for chaising a traffic violation or the like. CONSTITUTION:The toll collection system for automobile is provided with individual communicating means 2, 41 and 42 for performing individual communication by ratio between an on-vehicle side communication equipment 2 loaded on a vehicle 1 and gate side communication equipments 41 and 42 respectively installed at respective gates Ga and Gb of a toll area, and toll processing means K and S for calculating and delivering a toll by unitarily storing and calculating gate specification information such as time or gate code and vehicle identification information such as a car type or toll charging person concerning the vehicle 1 at the respective gates Ga and Gb obtained from these individual communicating means 2, 41 and 42 and as the vehicle identification information, the information of a number plate 3 is used.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a toll collection system for automobiles such as toll roads and toll parking lots, and a vehicle identification system used for tracking traffic violations.

[0002]

2. Description of the Related Art A toll collection method for toll roads such as expressways is generally a method of issuing a pass ticket to a driver with a manned person at an entrance or an automatic ticket issuing machine and then clearing the toll at an exit toll gate. In addition, like the Shuto Expressway, there are some that pay a fee at the entrance and can freely exit at the exit within the specified area. In any case, the driver must stop at the entrance or exit of the toll road and pay the usage fee.

Therefore, as shown in FIG. 11, a system has been proposed in which the usage fee is automatically paid without being temporarily stopped at the fee gate (see Japanese Patent Laid-Open No. 61-9783). That is, referring to FIG. 11, the automatic fee collection system includes an in-vehicle terminal device b ₁ mounted on the vehicle _1.
And individual communication means for wirelessly performing individual communication with the communication control devices Ca and Cb installed at the toll gates Ga and Gb at the entrance and exit, and via the connection lines L ₁ and L ₂ to each toll gate Ga and Gb. And a charge processing means including a bank online system S connected to the processing device K via a connection line L ₃ , and the vehicle type and the charge obtained from the individual communication. The charge processing unit centrally accumulates and calculates the charge specifying information such as identification codes of the charge gates Ga and Gb to the vehicle specifying information of the bearer etc. to calculate and pay the charge. is there.

In addition to the above, there has been proposed a device using a credit card as the terminal device b ₁ , or a device using a card type device provided on the windshield of a vehicle (Japanese Patent Laid-Open No. 61-61). 75989, and JP-A-62-214489). Also, a system aiming at the same effect by imaging the number of the approaching vehicle at the entrance / exit toll gate and performing comparison processing has been devised (see Japanese Patent Laid-Open No. 59-178591).

[0005]

However, none of the above systems has been put to practical use due to the following reasons. That is, in the case of communication, if the in-vehicle terminal device is installed as an option, the cost will be borne by the user, and whether or not to carry out non-stop will depend on the will and convenience of the driver, and it is difficult to automate 100%. On the side of the Highway Public Corporation, it is difficult to identify vehicles with or without onboard terminal devices, and it is unavoidable to install a manned gate separately, so the original purpose of the invention cannot be utilized. Is not able to specify the vehicle type if it is single, and separate identification means is required, and if it is not single, a card with a transmission / reception function that matches the fee system is needed, causing confusion. If it is installed on the maker side, the burden on the maker such as design problems will increase, and the method of installing a card with a transmitting / receiving function on the windshield You might lose de, also replace incorrect because it is easily apt to occur, communication between the vehicle-side and gate-side, single (identical)
Since there is a high possibility of interference due to the use of the above frequency, on the other hand, it is practically impossible to assign a frequency to each license plate, and there are problems such as being vulnerable to disturbance such as noise. Also, when using image processing, it is difficult to read the license plate on rainy nights, dirt on the camera,
With respect to the number plate dirt (mud, snowfall), the reading accuracy is lowered, which causes an erroneous determination, and there is a problem that another means is required to cover this defect.

The present invention has been made in view of the above problems of the prior art, and an object of the present invention is to realize a paid service which can be easily realized by using license plate information as vehicle identification information. It is to provide a toll collection system for automobiles such as roads and toll parking lots and a specific system for automobiles used for tracking traffic violations.

[0007]

In order to solve the above-mentioned problems, an automobile toll collection system according to the present invention is a vehicle-side communication device mounted on a vehicle and a gate-side communication installed at each gate of a pay area. Individual communication means for performing wireless individual communication with the device, and gate identification information such as time, gate code, etc. for the vehicle at each gate obtained from this individual communication means and vehicle identification information such as vehicle type and charge bearer A charge collection system for a vehicle, comprising: a charge processing unit for integrally storing and calculating and calculating a charge and payment processing, wherein license plate information is used as the vehicle specifying information.

Further, the vehicle identification system according to the present invention comprises an in-vehicle communication device which is provided integrally with a license plate and stores license plate information, and a ground communication device which wirelessly communicates with the in-vehicle communication device. The vehicle-side communication device sends license plate information to the ground-side communication device in response to a request from the ground-side communication device, and the vehicle is identified by the license-plate information obtained from the ground-side communication device to track the vehicle. Is to do.

[0009]

Since the license plate information is used as the vehicle identification information, any device for identifying the vehicle type (device for measuring the axle, tread, weight, etc.) is not necessary, and since the ID is unique to the vehicle, it is mutually exclusive. It is possible to prevent fraud such as exchange.

If the vehicle-mounted communication device storing the license plate information is provided integrally with the license plate by legal means, it is installed in all newly registered vehicles, and even if it is not newly registered, vehicle inspection is performed. It can be replaced at any time, which allows 100% of the in-vehicle communication device.
It can be installed.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing an outline of a toll collection system for an automobile according to the present invention. In FIG. 1, parts having the same actions as those in FIG. 11 are designated by the same reference numerals, and the description thereof will be omitted.

First, the overall structure will be described with reference to FIG.
1 is different from FIG. 11 in that a transponder (vehicle-side communication device) 2 capable of transmitting and receiving is mounted instead of the vehicle-mounted terminal device b ₁ of FIG. 11, and communication control devices Ca and Cb are provided.
Instead of this, gate side communication devices 41 and 42 which are communication control devices capable of transmission and reception are provided. The transponder 2 is integrally attached to a part of the license plate 3, and has a "Fukui 57" as shown in the drawing.
Information that matches the license plate information such as "mu 57-26" is stored. In addition, license plate 3
Is made of a non-conductive material such as plastic that does not interfere with wireless communication between the transponder 2 and the gate-side communication devices 41 and 42.

Next, a specific example of this transponder will be described with reference to FIGS. 2 is an external view of the transponder, FIG. 3 is a functional block diagram of the transponder, and FIG.
FIG. 7 is a time sequence diagram showing the operation of the transponder. In FIG. 2, the transponder 2 is an IC in which a tube 24 has an antenna 21, a transmission / reception circuit, and a memory circuit built therein.
The package 25 and the like are stored. in this way,
Since the transponder 2 is integrated, it is small.
Therefore, the license plate can be easily integrated and attached, and the cost is low, so that the burden on the user is small.

In FIGS. 3 and 4, the transponder 2
Is an antenna 21, receiving means (inside the broken line of reference numeral 26), storage means 6, transmitting means (inside the broken line of reference numeral 27), control circuit 4
Etc. When a radio wave having a carrier frequency f _S is received from the gate side communication device 41 or 42 through the antenna 21, the rectenna circuit 22 causes a resonance phenomenon due to an induction electromagnetic field to generate an induction current. The electric charge is stored and the terminal voltage V of the capacitor starts rising as shown in FIG.

When the time t ₁ is reached, the transponder 2 becomes the active region, the operation of each circuit including the control circuit 4 starts, and the control circuit 4 is initialized in the period from the time t _{1 to} t ₂ . At this time, it is output from the control circuit 4 and the transmission circuit 1
The control signal 28 for turning ON / OFF 0 is kept OFF, and the transmitting means 27 is not operating. The changeover switch 9 is set to the side a and is connected to the clock 23.

When the time t ₂ is reached, the control signal 28 from the control circuit 4 is turned on, and during the period from t _{2 to} t ₃ ,
The clock information of the transponder 2 is transmitted from the transponder 2 to the gate side communication device 41 or 42.
The clock 23 oscillates at a frequency of f _C , and this is f _C / N through the frequency divider circuit 5 provided in the control circuit 4.
(N is a positive integer). The frequency-divided signal is passed through the changeover switch 9 to the modulation circuit 11 and the oscillation circuit 10
In is mixed with the carrier wave of the generated frequency f _S, after being amplified by the power amplifier circuit 12, is wave propagation to the gate side communication apparatus 41 or 42 via the antenna 21. The gate-side communication device 41 or 42 can receive the same frequency f _S carrying the information of the clock 23 of the transponder 2 and know the timing of the clock 23 of the transponder 2 and thus the gate-side communication device 41 or 42. Synchronize your own clock. In addition, the gate side communication device 41 or 4
2 has a function to judge the phase difference between the transmitted wave and the received wave,
There is no interference. Further, the terminal voltage V of the capacitor during the period of t _{2 to} t ₃ does not drop much because the rectenna circuit 22 is operating.

The modulation circuit 11 performs PSK modulation (phase modulation) in this embodiment. FIG. 5 is a diagram showing the waveform 29 received by the gate side communication device 41 or 42 and the timing of the clock 23 demodulated by the demodulation means (not shown) of the gate side communication device 41 or 42 when the modulation circuit is PSK modulation. Is. The phase is inverted by 180 degrees every four and a half cycles, and a digital signal is generated based on this. Digital waveform 30
Edge is synchronized with the clock 23 of the transponder 2. period t ₂ ~t _3, the gate side communication apparatus 41 or 42 is sufficient time is set to synchronize with the clock 23 of the transponder 2. Note that other methods such as AM and FM can be used as the modulation method.

When the time reaches t ₃ , in the period until t ₄ , a data write request signal is issued from the gate side communication device 41 (entrance side) to the transponder 2 and the data storing means in the transponder 2 is performed by the following procedure. The operation of writing data in 6 is performed. Unwanted frequency components of the received wave 36 are removed by the bandpass filter 13, and only the extracted signal of the f _S component is amplified by the preamplifier 14 and input to the mixer 16. The input signal is mixed with the output frequency f _P of the synthesizer 15, and the clock 2
3 is synchronized with the phase. The signal output from the mixer 16 is an intermediate frequency component (f _S -f _P) is extracted by the band-pass filter 17, it is further amplified by the IF amplifier 18. This analog signal is digitally coded by the A / D conversion means 19, and the demodulation means 20 performs the cipher generation means 7
An exclusive OR operation is performed with the encryption code generated in step S4, and the original data D (t) is demodulated. When the demodulated data D (t) is, for example, “W”, the control circuit 4 of the transponder 2 executes the operation of writing the data to be sent next to the storage means 6. If not,
Data writing is not executed. That is, the license plate information cannot be written. The data to be written here is, for example, gate identification information such as the time and gate code at the entrance toll gate Ga in FIG.

When the time reaches t ₄ , the gate side communication device 41 or 42 terminates the transmission, enters the reception state, and receives the data transmitted from the transponder 2. The changeover switch 9 of the transponder 2 is switched to the b side,
A carrier wave 34 in which an exclusive OR signal 33 of the storage means 6 and the encryption code generation means 7 is generated by the oscillation circuit 10
(Carrier signal) is mixed in the modulation circuit 11 and transmitted as in the above case, and is completed at time t ₅ . Since the rectenna circuit 22 stops operating after time t _4, the terminal voltage V of the capacitor gradually drops, and the transponder 2 becomes an inactive region at a voltage V ₁ or less. The gate-side communication device 41 or 42 performs either data processing in real time in the period of t _{4 to} t ₅ or processing after data is temporarily stored in the memory. Here, the information read from the storage means 6 and transmitted is the gate side communication device 41 (entrance side).
Is the license plate information of the vehicle type, the charge bearer, etc. For the gate side communication device 42 (exit side), the license plate information of the vehicle type, the charge bearer, etc. and the above-mentioned entry fee This is the specific information of the gate Ga.
In the case where only the number plate information is written, the receiving means 26 of FIG. 3 may be connected only during the writing and removed after the writing. Further, in this way, the gate side communication device 4 such as the rectenna circuit 22 is provided.
The transponder 2 can be further miniaturized by adopting a configuration in which its own driving energy is supplied from 1 or 42. Further, by using this transponder 2, transmission / reception between the gate side communication devices 41 or 42 can be performed with weak power which does not require a license.

Next, the cipher generation means shown in FIG. 3 will be described with reference to FIGS. 6 to 8. FIG. 6 is a circuit diagram showing an example of a very simple method of generating an encryption code, which is composed of one 5-bit shift register and one exclusive OR circuit, and a clock CLK (timing Pulse) is supplied from the outside. FIG. 7 shows the input / output logic of the exclusive OR circuit of FIG. 6 and shows the states of two inputs A, B and an output Y. The logic "1" indicates "High" of the electric signal. Figure 8 is shows the operation of the circuit of FIG. 6 shows the internal register Q _A of the shift register every time the clock CLK is _{input, Q B, Q C, Q} D, the state transition of the Q _E . 0 of CLK column, status of the previous internal register Q _A to Q _E clock CLK is input is shown.

In FIGS. 6 to 8, the cipher code N
(T) corresponds to the output of Q _E. The output Y of the exclusive OR when CLK = 0 is "0" and is input to the shift register, but is not latched unless the clock CLK is input.

State C in which the first clock CLK is input
When LK = 1, the Y output “0” is immediately latched, and the output of the register Q _A in the shift register changes from “1” to “0”. The register Q _B latches the data “1” of the register Q _A at CLK = 0 and becomes “1”, but since it is the same data, there is no change. Hereinafter, the same operation is performed for all the registers Q _C , Q _D , and Q _E. At this time, the output Y of the exclusive OR becomes "0" as in the case of CLK = 0.

When CLK = 2, Y data "0" is latched in the register Q _A and the output of Q _A becomes "0". Q _B
The output of is latched with the data "0" of Q _A at CLK = 1 and becomes "0". The output of Q _C becomes “1” when the data “1” of Q _B at CLK = 1 is latched, but since it is the same data, there is no change. Hereinafter, the same operation is performed for both Q _D and Q _E. At this time, the output Y of the exclusive OR is CLK
It becomes "0" like = 1. The same operation as described above is performed even when CLK = 3.

At CLK = 4, the states of the registers Q _C and Q _E at CLK = 3 are "0" and "1", so that Q
The output of Y "1" is latched in the _A, the output is "1". Thereafter, the same operation is continued, and the 31st clock CL
The output of Q _E changes randomly until K is entered. In the illustrated example, the shift register has 5 bits, so theoretically 2 ⁵ −
The output of Q _E changes randomly with a period of 1. Then, for example, when the shift register of FIG. 5 has 8 bits, the output of Q _E changes with a cycle of 2 ⁸ −1 and when it has ¹⁴ bits, the cycle of 2 ¹⁴ −1. Therefore, by making the circuit of FIG. 6 complicated or using a plurality of combinations of similar blocks, it is possible to create an encryption code which has a finite period but does not pose a practical problem.
Such a method can be performed by writing random data in the semiconductor memory in addition to the combination of hardware, and the confidentiality of the data is further improved. If a combination of the semiconductor memory and the above hardware is used together, a more complicated code can be generated.

Next, double modulation of the transmission data D (t) in FIG. 3 will be described with reference to FIGS. 9 and 10. FIG. 9 shows FIG.
FIG. 3 is a detailed view of the relevant part of FIG. 3 and is a functional block diagram for double modulation of transmission data D (t). In FIG. 9, the transmission data D (t) stored in the storage means 6 and the cipher code N (t) generated by the cipher generation means 7 are exclusive in N (t) and D (t) in the conversion means 8. It is converted into a signal N (t) · D (t) (33) which is ORed. This signal 33 is the carrier wave As generated by the oscillation circuit 10.
In (ωt + φ) (34) is mixed with the modulation circuit 11 to generate a transmission wave S (t) = A · N (t) · D (t) · sin.
(Ωt + φ) (35), and this transmission wave 35 is propagated to the gate side communication device.

FIG. 10 is a time chart (CLK, N) in which the transponder generates double-modulated data.
3 is a time chart of (t), D (t), N (t) · D (t)) and data F (t) demodulated by the gate side communication device. The modulation / demodulation for the carrier wave is omitted.
In FIG. 10, CLK is a signal generated by the clock circuit of FIG.
(T) is a code known as common data, and the clock CLK has the same cycle. For convenience of explanation, it is assumed that both clocks CLK are synchronized and are operating in the same time range. The encryption code N (t) is repeated at ▼ mark in the drawing by a signal having a period of 2 ⁵ -1 obtained in FIG. 6, 31 clocks, 62 clocks, corresponding to 93 clock. The transmission data D (t) includes four clocks as one data, and includes seven data among 31 clocks of N (t), and the last three clocks, that is, 29 clocks to 31 clocks, 60 clocks. Clocks to 62 clocks and 91 clocks to 93 clocks correspond to stop pits indicating the end of data. In this embodiment, in one cycle of N (t), D
(T) is “1010011”, “1010100”,
"1000011" is transmitted serially. By the way,
ASCII character strings are "S", "T", and "C".
Even if the signal of N (t) · D (t) is received and demodulated by another transmission / reception device, the original data D
Since (t) is lost, it cannot be decrypted. Code N
Since (t) is defined as the same as the transponder in the regular transmission / reception device (gate side communication device), the received and demodulated N (t) .D (t) signal is inversely converted by the exclusive OR logic of FIG. Then, F (t) can be obtained. That is, it matches the data D (t) transmitted by the transponder.

In this case, since the clocks CLK of the transponder and the gate-side communication device are synchronized, even if another transponder interrupts the area of the gate-side communication device and the transmission is started, the data is demodulated because it is asynchronous. I can't. Therefore, although the same frequency is used, there is no data interference, and therefore it is very strong against external noise. If both clocks CLK are asynchronous (at the start of communication), the paragraph

Synchronization can be achieved by taking the means described in the above.

Next, the operation of the above-mentioned automobile toll collection system will be described. In FIG. 1, a vehicle 1 is located at the entrance of a toll road or toll parking lot. When the vehicle 1 approaches the entrance charge gate Ga, wireless individual communication is automatically performed between the gate-side communication device 41 and the transponder 2, and vehicle-specific information such as the vehicle type and the charge bearer is transmitted from the vehicle 1. To be done. Gate identification information such as the time and the identification code of the entrance toll gate Ga is added to the obtained vehicle identification information, and the vehicle identification information is sent to the processing device K via the connection line L ₁ . Next, when the vehicle 1 approaches the exit charge gate Gb, the same communication as described above is performed between the gate side communication device 42 and the transponder 2, and the same information as above is processed via the connection line L _2. Sent to device K. In the processing apparatus K, we calculate the price based on the vehicle identification information and the gate specifying information, sent on-line system S bank via the connection line L _3, automatically the vehicle 1 from the bank account of the specified fee payer Deduct the charges for. In addition, the entrance fee gate Ga may temporarily transmit and write the gate identification information to the transponder 2, the exit fee gate Gb may read the vehicle identification information together with the vehicle identification information, and the exit fee gate Gb may send the information to the processing device K for processing. It is possible. In this case, the connection between the entrance fee gate Ga and the processing device K becomes unnecessary, which is advantageous when one exit fee gate Gb is provided and a large number of entrance fee gates Ga are provided.

Incidentally, a legal measure is required to integrally attach the transponder 2 to the license plate 3.
If legal measures are taken in the future and this becomes possible, it will be installed in all newly registered vehicles, and even if it is not new registration, it can be replaced at the time of vehicle inspection, which allows 100% of transponder 2 to be installed. Is.
In addition, since the transponder 2 is integrally provided on the license plate 3, the possibility of loss is eliminated, and since it is legal means, it is difficult to perform mutual exchange and modification of the transponder 2 and the detection thereof is made. Will be easier.

In the above embodiment, the case where the transponder is used as the in-vehicle communication device has been described, but the present invention is not limited to this, and other ordinary communication devices can be used.

Further, in the above-mentioned embodiment, the case where the present invention is applied to the toll road or toll parking lot has been described, but the above-mentioned idea can be applied to the specific system of the automobile as it is. That is, an in-vehicle communication device that stores license plate information is provided integrally with the license plate, and a ground communication device (corresponding to the gate communication devices 41 and 42 in FIG. 1) that wirelessly communicates with this in-vehicle communication device. ) Is provided, the license plate information is transmitted from the vehicle-mounted communication device to the ground communication device in response to a request from the ground communication device, and the vehicle is identified by the license plate information obtained from the ground communication device. It is possible to track the vehicle. According to this, since the administrator can monitor the traveling route of the vehicle, it is effective in preventing crimes such as traffic violations.

[0032]

As described above, the vehicle toll collection system of the present invention has individual communication means for performing individual communication between the vehicle-mounted communication device and the gate-side communication device, and the gate obtained from this individual communication means. A system provided with a charge processing unit for calculating and paying a charge by centrally calculating the specific information and the vehicle specific information, and using license plate information as the vehicle specific information. For this reason,
The following effects can be obtained. In other words, there is no need for a device for identifying the vehicle type, there is no need to purchase a dedicated transceiver or card with a transmission / reception function, the user's burden is light, and there is no feeling of discomfort when introducing an automatic toll collection system. Since there is no need to attach transmitters / receivers, antennas, etc., no burden is imposed on the automobile manufacturer, and it can be used even in a bad environment where images cannot be read by the conventional method.

If the vehicle-mounted communication device storing the license plate information is provided integrally with the license plate by the legal means, the following effects can be obtained.
In other words, since it is installed in all newly registered vehicles, it can be thoroughly implemented, and even if it is not newly registered, it can be distributed to all vehicle types in up to 5 years by replacing the vehicle at the time of vehicle inspection, and it is possible to accelerate the realization of an automatic toll collection system. Since the vehicle registration is obligatory by the Road Transport Vehicle Law, the owner can be clarified and the efficiency of toll collection work can be improved. If they are differentiated by characterizing them, the effect of increasing the willingness to install them can be obtained, and it is possible to further promote their spread.

As described above, the vehicle identification system of the present invention includes the vehicle-mounted communication device that stores the license plate information, and the ground-side communication device that wirelessly communicates with the vehicle-mounted communication device. In response to the request from the ground-side communication device, the vehicle is specified by the license plate information obtained from the on-vehicle communication device and the vehicle is tracked. Therefore, it is possible to effectively prevent a traffic violation.

[Brief description of drawings]

FIG. 1 is a block diagram showing an outline of a toll collection system for an automobile according to the present invention.

FIG. 2 is an external view of a transponder.

FIG. 3 is a functional block diagram of a transponder.

FIG. 4 is a time sequence diagram showing the operation of the transponder.

FIG. 5 is a diagram showing timings of waveforms received by the gate-side communication device and clocks demodulated by the gate-side communication device.

FIG. 6 is a circuit diagram showing a method for generating an encryption code.

FIG. 7 is a logical diagram of exclusive OR.

FIG. 8 is a diagram showing an encryption code and a clock.

FIG. 9 is a functional block diagram for transmission data double modulation of a transponder.

FIG. 10 is a time chart in which a transponder generates double-modulated data and a time chart in which data is demodulated by a gate-side communication device.

FIG. 11 is a block diagram showing an outline of a conventional automobile toll collection system.

[Explanation of symbols]

 D (t) Transmission data Ga Entrance charge gate (gate) Gb Exit charge gate (gate) K Processing device (charge processing means) N (t) Encryption code S Bank online system (charge processing means) 1 Vehicle 2 Transponder (vehicle side) Communication device, individual communication means 3 License plate 4 Control circuit (control means) 6 Storage means 26 Receiving means (vehicle side transmitting / receiving means) 27 Transmitting means (vehicle side transmitting / receiving means) 34 Carrier wave (carrier signal) 41 Gate side communication device ( Individual communication means) 42 Gate side communication device (individual communication means)

Claims (7)

[Claims] 1. An individual communication unit for performing wireless individual communication between a vehicle-mounted communication device mounted on a vehicle and a gate-side communication device installed at each gate of a pay area, and an individual communication unit obtained from the individual communication unit. The time about the vehicle at each gate, the gate identification information such as the gate code, and the vehicle type,
A toll collection system for an automobile, comprising: a fee processing means for centrally accumulating and calculating vehicle identification information of a fee bearer etc. to calculate and pay a fee, and license plate information as the vehicle identification information. A toll collection system for automobiles characterized by using. 2. The vehicle charge according to claim 1, wherein the license plate information is stored in the vehicle-mounted communication device, and the vehicle-mounted communication device is attached to a vehicle license plate. Collection system. 3. The gate-side communication device comprises gate-side transmitting / receiving means, and the in-vehicle communication device transmits / receives data to / from the gate-side transmitting / receiving means, and storage means for storing vehicle identification information. Data such as gate specifying information from the gate side transmitting / receiving means is stored in the storage means and / or the gate specifying information from the storage means via the vehicle side transmitting / receiving means in response to a request from the gate side communication device.
The vehicle fee collection system according to claim 1, further comprising a control means for transmitting data such as vehicle identification information to the gate side transmitting / receiving means. 4. The vehicle fee collection system according to claim 1, wherein the vehicle-mounted communication device is supplied with its own driving energy from the gate-side communication device. 5. The toll collection system for an automobile according to claim 1, wherein a carrier signal between the vehicle-mounted communication device and the gate-side communication device is encoded. 6. The toll collection system for an automobile according to claim 1, wherein communication data between the vehicle-mounted communication device and the gate-side communication device is multiplexed into a carrier signal. 7. An in-vehicle communication device that is integrally provided with a license plate and stores license plate information, and a ground communication device that wirelessly communicates with the in-vehicle communication device. The vehicle is characterized in that the vehicle-side communication device transmits the license plate information to the ground communication device, and the vehicle is specified by the license plate information obtained from the ground communication device to track the vehicle. Specific system.