JP2950114B2 - Road traffic information transmission system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a road traffic information transmission system for adding road traffic information to a charging direct current and supplying it to an electric vehicle.

[0002]

2. Description of the Related Art Recently, electric vehicles equipped with a rechargeable battery have been used in consideration of environmental pollution. In addition, road traffic information is also provided to traveling vehicles in order to provide safe driving of the vehicles. This road traffic information transmits a congestion state of an expressway, a ring road, or the like by a weak radio wave based on the AM method at the upper end frequency of the medium wave broadcasting band. Further, a weak radio wave by a digital modulation method indicating the display state of the traffic signal is transmitted from the vicinity of the traffic signal at an intersection or the like. In an electric vehicle, a mounted rechargeable battery is charged every certain traveling, and information may be exchanged between the electric vehicle and the charging device when performing the charging. For example, in "Electric vehicle and its charging station" disclosed in Japanese Patent Application Laid-Open No. 4-358950, the charging station determines an optimum value of charging voltage and current using data supplied from the electric vehicle. I have.

[0003]

However, in the conventional road traffic information transmission system, in the provision of road traffic information by wireless transmission, the traveling vehicle passes through the area where the broadcast is received in a short time. On the other hand, a large amount of traffic information cannot be provided. Further, there are disadvantages such as the occurrence of reception trouble in the surrounding receiver due to unnecessary radiation and the consumption of large power.

The present invention solves such a conventional problem. When charging a rechargeable battery in an electric vehicle, a large amount of road traffic information is removed from noise and added to a direct current for charging. It aims to provide an excellent road traffic information transmission system that can be provided.

[0005]

In order to achieve the above object, a road traffic information transmission system according to the present invention comprises an information input means for inputting road traffic information, and a modulation means for modulating the road traffic information from the information input means. Means for transmitting the modulated road traffic information to the information receiving device mounted on the electric vehicle through the power supply line when charging, and the power supply line is electrically coupled with the modulated road traffic information from the modulation means. And a DC supply means for outputting a charging DC in the type vehicle.

In this configuration, the DC supply means includes a DC power supply for outputting a DC converted from an AC, and a noise removing means for removing noise superimposed on the DC from the DC power supply. .

[0007] Further, the DC supplied through the power supply line is supplied to the rechargeable battery, and at the same time, the DC flow is prevented, and DC flow blocking means for extracting and outputting modulated road traffic information is provided. Demodulation means for outputting road traffic information obtained by demodulating the modulated road traffic information output from the DC flow blocking means to the in-vehicle receiving device and displaying the information is provided.

Further, in addition to this configuration, a data conversion output unit for converting the road traffic information from the demodulation unit into a signal for processing and display by the on-vehicle receiving device is provided.

[0009]

With this configuration, in the road traffic information transmission system of the present invention, when charging the electric vehicle, noise is removed from charging DC in the electric vehicle together with modulated road traffic information obtained by modulating the road traffic information. And send it out through the feeder line. The DC supplied through the power supply line is charged by a rechargeable battery, and the road traffic information obtained by demodulating the modulated road traffic information is converted and output for display by the on-vehicle receiver. Therefore, during charging for a relatively long time, a large amount of road traffic information is provided by removing noise with a relatively short power supply line and adding to DC for charging.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the road traffic information transmission system according to the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a block diagram showing the overall configuration of an embodiment of the road traffic information transmission system according to the present invention. In FIG. 1, this road traffic information transmission system is installed in a home, a gas station, or the like, and charges road traffic information D1 received from an information providing source such as a traffic control center through a communication line or the like when charging with an electric vehicle. The DC / modulated road traffic information D2 added to the DC for
And a charger 3 for converting the direct current for charging the electric vehicle from an AC power supply and supplying the converted information to the information transmitting device 2. Further, in this road traffic information transmission system, the DC / modulated road traffic information D2 is supplied from the information transmitting device 2 through the power supply line L, and the direct current and the modulated road traffic information D2 are separated and the demodulated road traffic information D3 is transmitted. An information receiving device 12 for outputting to an in-vehicle receiving device (not shown), and a rechargeable battery 13 for charging a direct current in the direct current / modulated road traffic information D2 supplied from the information transmitting device 2 through the power supply line L and serving as a power source in the electric vehicle. And

FIG. 2 is a block diagram showing a detailed configuration of the information transmitting device 2. In FIG. 2, this information transmitting device 2
An information input unit 5 for receiving road traffic information D1 from an information providing source such as a traffic control center through a communication line or the like;
A digital modulator 6 for digitally modulating the reception data as the road traffic information D1 from the information input unit 5 and transmitting the modulated road traffic information D2 superimposed on the carrier inputted from the carrier transmitter 7 to the feed line L; doing. A carrier transmitter 7 for oscillating a carrier and transmitting the carrier to the digital modulator 6;
And a noise removing unit 8 that sends out, to the power supply line L, the DC from which noise superimposed on the DC from the charger 3 has been removed. In addition, the charger 3 that supplies DC through the noise removing unit 8
A DC power supply 9 for converting an AC from an AC power supply to a DC and outputting the DC is provided.

FIG. 3 is a block diagram showing a detailed configuration of the information receiving apparatus 12. In FIG. 3, the information receiving device 12 has a DC component cut unit 15 that cuts a DC in the DC / modulated road traffic information D2 from the information transmitting device 2 and outputs only the modulated road traffic information D2. The demodulation unit 16 further demodulates the modulated road traffic information D2 and outputs the demodulated digital data, and sends out the road traffic information D3 obtained by converting the inputted digital data so that it can be received by an in-vehicle receiver (not shown). And a data transmission unit 17.

Next, the operation of the configuration of this embodiment will be described. The information transmission device 2 is installed together with the charger 3 at a home, a gas station, or the like. The information transmission device 2 constantly receives road traffic information D1 from an information providing source such as a traffic control center through a communication line or the like. I have.
In the information transmission device 2, the road traffic information D1 is received by the information input unit 5 via a communication line or the like, and the road traffic information D1 processed by the information input unit 5, for example, demodulated received data is transmitted to the digital modulation unit 6. Send out. The digital modulator 6 digitally modulates the data received from the information input unit 5 and sends out the modulated road traffic information D2 superimposed on the carrier input from the carrier transmitter 7 to the feeder line L. On the other hand, the charger 3 converts alternating current supplied from an alternating current power source into direct current by a direct current power source 9 and outputs the direct current to a noise removing unit 8 in the information transmitting device 2. The noise removing unit 8 removes the noise generated by the DC power supply 9 in the charger 3 from the supplied DC through a filter or the like, and sends out the noise to the power supply line L together with the modulated road traffic information D2 from the digital modulator 6. The DC / modulated road traffic information D2 is supplied by connecting the power supply line L to the information transmission device 2 and the rechargeable battery 13 mounted on the electric vehicle.

Thus, the rechargeable battery 13 is charged. At the same time, the DC component cut section 15 in the information receiving device 12 cuts DC by, for example, a capacitor or the like and outputs only the modulated road traffic information D2. The modulated road traffic information D2 is input to the demodulation unit 16 and transmits to the data transmission unit 17 digital data obtained by demodulating the road traffic information D1 which is a modulated wave. The data transmission unit 17 converts the input digital data into road traffic information D3 of digital data, for example, in an AM system and transmits the digital data so that the in-vehicle receiving device (not shown) can receive the digital data. In this case, for example, in the case of the AM system, the on-vehicle receiving device may be a radio receiver that receives the upper end frequency of the medium-wave broadcast band in the commonly used AM system.
, A digital processing device that stores the digital data, that is, the road traffic information D1 in a memory or the like, and displays the screen on a display or the like after the storage. Further, the digital data can be transmitted from the data transmitting unit 17 to the in-vehicle navigation device and displayed. For example, an in-vehicle navigation device obtains the current absolute position (latitude and longitude) through satellite radio waves.
It is composed of a PS receiving device, a CD device for transmitting road map information, and the like. When displaying the road map information on a display, it is also possible to display the road traffic information D3 together.

As described above, in this embodiment, when the rechargeable battery 13 is charged for a relatively long time, a large amount of road traffic information is transferred to the relatively short power supply line L and the noise removing unit in the information transmitting device 2. 8 to remove noise and add to the charging direct current. In this case, the road traffic information D1 can be provided, for example, through a public telephone line for each information transmission device 2 installed in a home or a gas station. Therefore, it is possible to provide road traffic information at a lower cost compared to the transmission method using an AM weak radio wave using the upper end frequency of the medium wave broadcasting band as described above.

[0017]

As is apparent from the above description, the road traffic information transmission system of the present invention, when charging an electric vehicle, together with modulated road traffic information obtained by modulating the road traffic information, is used for charging the electric vehicle. DC is removed from the noise, transmitted through the power supply line, the DC supplied through the power supply line is charged with a rechargeable battery, and the road traffic information obtained by demodulating the modulated road traffic information is converted to be displayed on the on-board receiver. And output it, so that a large amount of road traffic information during charging for a relatively long time can be provided with noise removed by a relatively short power supply line and added to DC for charging. .

[Brief description of the drawings]

FIG. 1 is an overall configuration block diagram of a road traffic information transmission system according to an embodiment of the present invention.

FIG. 2 is a configuration block diagram of an information transmission device in the road traffic information transmission system according to the embodiment of the present invention.

FIG. 3 is a configuration block diagram of an information receiving device in the road traffic information transmission system according to the embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 2 information transmission device 3 charger 5 information input unit 6 digital modulation unit 7 carrier transmission unit 8 noise removal unit 9 DC power supply 12 information reception device 13 rechargeable battery 15 DC component cut unit 16 demodulation unit L power supply line

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) G08G 1/00-1/16 B60L 11/18

Claims (4)

(57) [Claims] An information input means for inputting road traffic information and modulated road traffic information obtained by modulating the road traffic information from the information input means are charged to an information receiving device mounted on the electric vehicle. Road traffic information transmission, comprising: a modulating means for sending out the electric power through a power supply line, and a DC supply means for outputting, on the power supply line, a charging DC in the electric vehicle together with the modulated road traffic information from the modulating means. system. 2. A DC power supply comprising: a DC power supply for outputting a DC converted from an AC, and a noise removing means for removing noise superimposed on the DC from the DC power supply. 1. The road traffic information transmission system according to 1. 3. A DC flow blocking means for supplying a DC flow through a power supply line to a rechargeable battery, blocking the flow of the DC flow, and extracting and outputting modulated road traffic information. A road traffic information transmission system comprising: a road traffic information demodulated from the modulated road traffic information output from the DC flow blocking means; 4. The road according to claim 3, further comprising data conversion output means for converting the road traffic information from the demodulation means into a signal for processing and display by the on-vehicle receiving device. Traffic information transmission system.