JP2006244355A - Snow countermeasure information transmission/reception system and vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To notify a vehicle of information on snow countermeasure of other vehicles in a toll road to urge the vehicle to take snow countermeasure at a proper position and time in the toll road. <P>SOLUTION: A tire pressure sensor 60 detects a radio wave transmitted from a chain transmitter 93, a tire pressure information reception apparatus 5 receives chain radio wave presence information, and a vehicle navigation system 100 detects attachment/detachment of a chain to/from the tire on the basis of the chain radio wave presence information. A winter tire radio wave reception apparatus 70 receives a radio wave transmitted from a winter tire transmitter 80, and the vehicle navigation apparatus 100 detects the attachment/detachment of a winter tire based on the presence of the radio wave. The vehicle navigation apparatus 100 stores chain attachment information and winter tire attachment information at the detection, transmits the information from ETC on-vehicle equipment 20 as snow countermeasure information when the vehicle exits the toll road, and displays the snow measure information by receiving from the ETC on-vehicle equipment 20 when the vehicle enters the toll road. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

The present invention relates to a snow countermeasure information transmission / reception system and a vehicle, and more particularly to a snow countermeasure information transmission / reception system and a vehicle for urging a chain to be attached to a tire of a vehicle or replacement of a tire with a studless tire on a toll road.

Winter toll roads, especially toll roads in the northern part of Japan and toll roads that pass through mountainous areas, often experience snowfall due to climate changes during driving, and in the event of snowfall, the chain to the vehicle tires It is necessary to take measures against snow such as mounting and replacement of tires with studless tires. However, until actually encountering snowfall, it was difficult to determine which place and time (position and time) on the toll road should be subjected to snow countermeasures.

For this reason, in the conventional traffic information display control method, data such as snowfall by each sensor of an automobile is transmitted from an in-vehicle transmission / reception circuit, and the data is received by a receiving circuit of a roadside display device, and the control unit receives snowfall. The position and time are determined, and snowfall information is displayed on the display unit to urge the vehicle to take measures against snow (see, for example, Patent Document 1).

Further, some conventional tire chain detection devices recognize a tire chain mounting state by image processing (see, for example, Patent Document 2).
Japanese Patent Laid-Open No. 6-180795 JP 2000-193419 A

The display control method for traffic information disclosed in Patent Document 1 transmits data such as snowfall by each sensor of an automobile from an in-vehicle transmission / reception circuit, and receives the data by a reception circuit of a roadside display device. The position and time of snowfall are judged by the above, and the snowfall information is displayed on the display unit to urge the vehicle to take measures against snow, but the information is sent to the other vehicle to provide more appropriate guidance within the vehicle. There is a problem that cannot be done.

Moreover, since the tire chain detection device disclosed in Patent Document 2 recognizes the tire chain mounting state by image processing, there is a problem that the device for image processing becomes large and the processing load is large. .

The first problem of the present invention is to inform the vehicle that a countermeasure against snow has been taken by attaching a chain to a tire on a toll road or replacing the tire with a studless tire. It is an object of the present invention to provide a snow countermeasure information transmission / reception system capable of prompting a vehicle tire to take a snow countermeasure at an accurate position and time.

The second problem of the present invention is that even when the vehicle is in the toll road, knowing that another vehicle has attached a chain to the tire or replaced the tire with a studless tire to take measures against snow, so that the toll road can be used even on the own vehicle. It is an object of the present invention to provide a vehicle capable of taking snow countermeasures at an accurate position and time.

Means for Solving the Problems and Effects of the Invention

The snow countermeasure information transmission / reception system according to claim 1 is transmitted from a snow countermeasure information transmitting means for determining whether or not a snow countermeasure is applied to a vehicle tire and transmitting the snow countermeasure information, and the snow countermeasure information transmitting means. A snow measure information receiving means for receiving the snow measure information, a storage means for recording the snow measure information, a display means for displaying the snow measure information, and the snow measure information when the vehicle exits a toll road. The ETC on-vehicle device that receives the snow countermeasure information from the ETC roadside device when entering the toll road, and the snow transmitted from the ETC on-vehicle device when the vehicle leaves the toll road The information center receives and accumulates countermeasure information via an ETC roadside device, and transmits the snow countermeasure information accumulated when the vehicle enters the toll road to the ETC on-vehicle device via the ETC roadside device. Characterized in that it has and. According to the snow countermeasure information transmission / reception system of claim 1, since the own vehicle can know the snow countermeasure information of other vehicles in the toll road, the snow countermeasure is taken at the exact position and time in the toll road in the own vehicle. Can be applied.

The snow countermeasure information transmission / reception system according to claim 2 is an ETC vehicle-mounted device that performs toll payment on a toll road by communication with an ETC roadside device, a chain transmitter attached to a chain, and a transmission from the chain transmitter A tire pressure sensor for detecting the received radio wave, a tire pressure information receiving device for receiving chain wave presence / absence information from the tire pressure sensor, and a tire based on the chain wave presence / absence information received by the tire pressure information receiving device. It detects that the chain has been attached / detached, stores the position and time of the vehicle at the time of detection as chain attachment / detachment information, and transmits the chain attachment / detachment information as snow countermeasure information from the ETC on-board device when leaving the toll road, A vehicle navigation system for receiving and displaying the snow countermeasure information by the ETC on-board device when entering a road And the snow measure information transmitted from the ETC on-board device when the vehicle leaves the toll road when the vehicle leaves the toll road through the ETC roadside device, and accumulates the vehicle. And an information center that transmits the snow countermeasure information accumulated at the time of approach to the ETC on-board device via an ETC roadside device. According to the snow countermeasure information transmitting / receiving system according to claim 2, since the own vehicle can know the position and time at which the other vehicle has attached the chain in the toll road, the exact position and time in the toll road in the own vehicle. It is possible to take measures against snow by attaching a chain to the tire or replacing the tire with a studless tire.

The snow countermeasure information transmission / reception system according to claim 3 is an ETC vehicle-mounted device that performs toll payment on a toll road by communication with an ETC roadside device, a studless tire transmitter attached to a studless tire, and the studless tire transmission. A studless tire radio wave receiving device that receives radio waves transmitted from the vessel, and detecting that the studless tire is attached or detached based on the presence or absence of radio waves received by the studless tire radio wave receiving device, and the position of the vehicle at the time of detection and The time is stored as studless tire attachment / detachment information, and when the vehicle leaves the toll road, the studless tire attachment / detachment information is transmitted as snow countermeasure information from the ETC on-board device, and when entering the toll road, the ETC on-board device transmits the snow countermeasure. Vehicle comprising vehicle navigation device for receiving and displaying information And the snow countermeasure information transmitted from the ETC on-board device when the vehicle leaves the toll road is received and accumulated via the ETC roadside device, and accumulated when the vehicle enters the toll road. And an information center that transmits the snow countermeasure information to the ETC vehicle-mounted device through an ETC roadside device. According to the snow countermeasure information transmission / reception system of claim 3, since the own vehicle can know the position and time at which the other vehicle has replaced the tire with the studless tire in the toll road, the accurate information in the toll road in the own vehicle can be obtained. It is possible to take measures against snow by attaching a chain to the tire at the position and time, or replacing the tire with a studless tire.

The snow countermeasure information transmission / reception system according to claim 4 is an ETC on-board device that performs toll payment on a toll road by communication with an ETC roadside device, a chain transmitter attached to a chain, and a transmission from the chain transmitter. A tire pressure sensor for detecting a generated radio wave, a tire pressure information receiving device for receiving chain radio wave presence / absence information from the tire pressure sensor, a studless tire transmitter attached to a studless tire, and a transmission from the studless tire transmitter A studless tire radio wave receiving device for receiving the received radio wave, and detecting that the chain is attached to and detached from the tire based on the chain radio wave presence / absence information received by the tire air pressure information receiving device, and the position and time of the vehicle at the time of detection Is stored as chain attachment / detachment information, and the studless tire radio wave It detects that the studless tire has been attached / detached based on the presence or absence of radio waves received by the communication device, stores the position and time of the vehicle at the time of detection as studless tire attachment / detachment information, and the chain when the vehicle leaves the toll road A vehicle navigation device that transmits attachment / detachment information and studless tire attachment / detachment information as snow countermeasure information from the ETC vehicle-mounted device, and receives and displays the snow countermeasure information by the ETC vehicle-mounted device when entering a toll road. And the snow countermeasure information transmitted from the ETC on-board device when the vehicle leaves the toll road is received and accumulated via the ETC roadside device, and accumulated when the vehicle enters the toll road. And an information center that transmits the snow countermeasure information to the ETC vehicle-mounted device through an ETC roadside device. According to the snow countermeasure information transmission / reception system according to claim 4, it is possible to know on the own vehicle the position and time at which the other vehicle attached the chain to the tire or replaced the tire with a studless tire on the toll road. In the own vehicle, it is possible to take measures against snow by attaching a chain to the tire at an accurate position and time on the toll road, or by replacing the tire with a studless tire.

The snow countermeasure information transmission / reception system according to claim 5 is the snow countermeasure information transmission / reception system according to any one of claims 1 to 4, wherein the snow countermeasure information includes an ETC vehicle-mounted device ID and a chain or studless tire. It is composed of a snow measure type that indicates the type of snow, a detachment flag that indicates whether it is wearing or taking off, a position consisting of latitude, longitude and altitude, and a time consisting of day, hour, minute and second To do. According to the snow countermeasure information transmission / reception system according to claim 5, it is possible to accurately know the position and time at which the other vehicle has attached the chain to the tire on the toll road or replaced the tire with a studless tire. It is possible to accurately predict the position and time when the vehicle encounters snow, and before reaching the position and time, a chain is attached to the tire and the tire is replaced with a studless tire. And can take measures against snow.

The snow countermeasure information transmission / reception system according to claim 6 is the snow countermeasure information transmission / reception system according to any one of claims 1 to 5, wherein the snow countermeasure information is stored in the host vehicle when entering the toll road. If the information indicates that the tire is subjected to snow countermeasures, the snow countermeasure information received by the ETC vehicle-mounted device is not displayed. According to the snow countermeasure information transmission / reception system of claim 6, if the snow countermeasure information stored in the own vehicle indicates that the tire is subjected to the snow countermeasure information, the snow countermeasure information of the other vehicle is not displayed. Therefore, troublesomeness due to display of unnecessary information is reduced.

The snow countermeasure information transmission / reception system according to claim 7 is the snow countermeasure information transmission / reception system according to any one of claims 1 to 6, wherein the vehicle includes an inter-vehicle communication device, and the own vehicle has snow countermeasure information. Is stored, the snow countermeasure information is transmitted to another vehicle by inter-vehicle communication, and if the snow countermeasure information is stored in the other vehicle, the snow countermeasure information is received from the other vehicle by inter-vehicle communication. It is displayed on the own vehicle. According to the snow countermeasure information transmission / reception system of claim 7, since the position and time at which the other vehicle has attached the chain to the tire on the toll road or replaced the tire with the studless tire are directly notified from the other vehicle. It is possible to immediately know the position and time when the host vehicle encounters snow, and it is possible to immediately implement snow countermeasures such as attaching a chain to a tire or replacing the tire with a studless tire in the host vehicle.

The vehicle according to claim 8 is configured to determine whether or not a snow countermeasure is applied to a tire of the vehicle and transmit snow countermeasure information, and snow countermeasure information transmitted from the snow countermeasure information transmitting means. The snow countermeasure information receiving means for receiving the snow countermeasure information, the storage means for recording the snow countermeasure information, the display means for displaying the snow countermeasure information, and the snow countermeasure information when the vehicle leaves the toll road through the ETC roadside device. And an ETC vehicle-mounted device that receives the snow countermeasure information from the information center via an ETC roadside device when the vehicle enters a toll road. According to the vehicle of claim 8, since it is possible to know the snow countermeasure information of other vehicles on the toll road by the own vehicle, it is possible to take snow countermeasures at the exact position and time in the toll road on the own vehicle. .

The vehicle according to claim 9 is an ETC vehicle-mounted device that performs toll road fee settlement by communication with an ETC roadside device, a chain transmitter attached to a chain, and a radio wave transmitted from the chain transmitter. A tire pressure sensor to detect, a tire pressure information receiving device for receiving chain radio wave presence / absence information from the tire pressure sensor, and a chain attached to and detached from the tire based on the chain radio wave presence / absence information received by the tire pressure information receiving device The vehicle position and time at the time of detection are stored as chain attachment / detachment information, and when leaving the toll road, the chain attachment / detachment information is transmitted as snow countermeasure information from the ETC on-board device, and enters the toll road. A vehicle navigation device that sometimes receives and displays the snow countermeasure information by the ETC vehicle-mounted device. The features. According to the vehicle of the ninth aspect, since the own vehicle can know the position and time at which the other vehicle has attached the chain on the toll road, the chain is attached to the tire at the exact position and time on the toll road in the own vehicle. It is possible to take measures against snow by wearing or replacing the tire with a studless tire.

The vehicle according to claim 10 is transmitted from an ETC vehicle-mounted device that performs toll payment on a toll road by communication with an ETC roadside device, a studless tire transmitter attached to a studless tire, and the studless tire transmitter. A studless tire radio wave receiving device for receiving the received radio waves, and detecting whether the studless tire is attached or detached based on the presence or absence of radio waves received by the studless tire radio wave receiving device, and determining the position and time of the vehicle at the time of detection of the studless tire It is stored as attachment / detachment information, and when the vehicle leaves the toll road, the studless tire attachment / detachment information is transmitted as snow countermeasure information from the ETC on-vehicle device, and when entering the toll road, the snow countermeasure information is received by the ETC on-vehicle device. And a vehicle navigation device for displaying. According to the vehicle of claim 10, since the own vehicle can know the position and time at which another vehicle has replaced the tire with the studless tire on the toll road, the exact position and time on the toll road in the own vehicle can be determined. Snow measures can be taken by attaching a chain to the tire or replacing the tire with a studless tire.

The vehicle according to claim 11 is an ETC vehicle-mounted device that performs toll road fee settlement by communication with an ETC roadside device, a chain transmitter attached to a chain, and a radio wave transmitted from the chain transmitter. A tire pressure sensor for detecting, a tire pressure information receiving device for receiving chain wave presence / absence information from the tire pressure sensor, a studless tire transmitter attached to a studless tire, and a radio wave transmitted from the studless tire transmitter. Based on the studless tire radio wave receiving device to receive and the chain radio wave presence / absence information received by the tire air pressure information receiving device, it is detected that the chain has been attached to and detached from the tire, and the position and time of the vehicle at the time of detection are shown in the chain attachment / detachment information As received and received by the studless tire radio wave receiver It detects that the studless tire has been attached / detached based on the presence / absence of radio waves, stores the position and time of the vehicle at the time of detection as studless tire attachment / detachment information, and the chain attachment / detachment information and the studless when the vehicle leaves the toll road A vehicle navigation device that transmits tire attachment / detachment information as snow countermeasure information from the ETC vehicle-mounted device and receives and displays the snow countermeasure information by the ETC vehicle-mounted device when entering a toll road. According to the vehicle of claim 11, since the vehicle can know the position and time at which the other vehicle has attached the chain to the tire or replaced the tire with the studless tire on the toll road. Snow measures can be taken by attaching a chain to the tire at an exact position and time in the toll road, or by replacing the tire with a studless tire.

The vehicle according to claim 12 is the vehicle according to any one of claims 8 to 11, wherein the snow countermeasure information includes an ETC onboard unit ID and a snow countermeasure type indicating a chain or a studless tire. It is characterized by comprising an attachment / detachment flag indicating whether arrival or departure, a position consisting of latitude, longitude and altitude, and a time consisting of day, hour, minute and second. According to the vehicle of the twelfth aspect, the vehicle can accurately know the position and time at which the other vehicle has attached the chain to the tire or replaced the tire with the studless tire on the toll road. It is possible to accurately predict the position and time when the vehicle encounters snow, and by attaching a chain to the tire in the host vehicle or changing the tire to a studless tire before reaching the position and time. Snow measures can be taken.

The vehicle according to claim 13 is the vehicle according to any one of claims 8 to 12, wherein when the vehicle enters the toll road, the snow countermeasure information stored in the host vehicle is applied to the tire. If it is shown that it has been performed, the snow countermeasure information received by the ETC on-board unit is not displayed. According to the vehicle of the thirteenth aspect, if the snow countermeasure information stored in the host vehicle indicates that the tire is subjected to the snow countermeasure information, the snow countermeasure information of the other vehicle is not displayed. The troublesomeness caused by the display of information that is not performed is reduced.

The vehicle according to claim 14 is the vehicle according to any one of claims 8 to 13, wherein the vehicle is provided with an inter-vehicle communication device, and the snow countermeasure information is stored in the own vehicle. Is transmitted to the other vehicle by inter-vehicle communication, and if snow countermeasure information is stored in the other vehicle, the snow countermeasure information is received from the other vehicle by inter-vehicle communication and displayed on the own vehicle. According to the vehicle of claim 14, since the other vehicle is directly notified of the position and time when the other vehicle attaches the chain to the tire or replaces the tire with the studless tire on the toll road, It is possible to immediately know the position and time when the snow is encountered, and it is possible to immediately take measures against snow, such as attaching a chain to the tire or replacing the tire with a studless tire in the host vehicle.

In the toll road, another vehicle attaches a chain to the tire or replaces the tire with a studless tire to inform the vehicle that snow measures have been taken, and take snow measures at the exact location and time on the toll road. Encourage

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is an overall configuration diagram of a snow countermeasure information transmission / reception system according to Embodiment 1 of the present invention. The snow countermeasure information transmission / reception system according to the first embodiment includes a vehicle navigation device 100, an ETC (Electronic Toll Collection) device 20, an ETC roadside device 30, an information center 40, and tire pressure information. The receiver 50, the tire pressure sensor 60, the chain transmitter 93, the studless tire radio wave receiver 70, and the studless tire transmitter 80 constitute the main part.

The vehicle navigation device 100 includes a position detector 1, a map data input device 6, an operation switch group 7, an external storage device 9, a display device 10, a remote control (hereinafter abbreviated as a remote control) sensor 11, a remote control terminal 12, a voice. An output device 13 and a control circuit 8 connected to them are provided.

The position detector 1 detects the azimuth based on the geomagnetism, calculates the azimuth based on the geomagnetic sensor 2 that acquires the azimuth data representing the detected azimuth, and detects the angular velocity, and indicates the calculated azimuth. GPS radio waves transmitted from a gyroscope 3 that acquires azimuth data, a distance sensor 4 that detects a travel distance and acquires distance data indicating the detected distance, and a GPS (Global Positioning System) satellite And a GPS receiver 5 that obtains position data by calculating parameters stored in the received GPS radio wave. Since these sensors 2, 3, 4, and 5 have errors of different properties, they are used while being complemented by a plurality of sensors. Depending on the accuracy, a part of the sensors described above may be used, and further, a steering rotation sensor, a wheel sensor of each rolling wheel, or the like may be used.

The map data input device 6 is a device for inputting various data including so-called map matching data for improving the accuracy of position detection and road data representing road connections from the storage medium 14. As the storage medium 14, a CD-ROM (Compact Disk-Read Only Memory), a DVD (Digital Versatile Disk), or an HDD (Hard Disk Drive) is generally used based on the amount of data. Other storage media may be used.

As the operation switch group 7, for example, a touch switch or a mechanical switch integrated with the display device 10 is used. The touch switch is composed of infrared sensors that are finely arranged vertically and horizontally on the screen of the display device 10. For example, when the infrared ray is cut off with a finger, a touch pen, or the like, the cut-off position becomes a two-dimensional coordinate value (X, Y). A pointing device such as a mouse or a cursor may be used. Various instructions can be input by the operation switch group 7 and the remote control terminal 12.

The external storage device 9 stores information and data necessary for the operation of the vehicle navigation device 100. In particular, snow countermeasure information described in detail later is recorded. The external storage device 9 is configured to retain the stored contents even when the accessory switch of the vehicle is turned off (that is, the vehicle navigation device 100 is turned off).

The display device 10 is configured by a color liquid crystal display or the like. On the screen of the display device 10, a vehicle current position mark input from the position detector 1, map data input from the map data input device 6, Further, additional data such as a guidance route to be displayed on the map is displayed in a superimposed manner, and menu icons for setting route guidance, guidance during route guidance, and switching operation of the screen are displayed on this screen.

The ETC vehicle-mounted device 20 is a communication device that communicates with the ETC roadside device 30 using DSRC (Dedicated Short Range Communication) using a 5.8 GHz band radio signal. The ETC vehicle-mounted device 20 is a publicly known device, and the detailed configuration thereof is not directly related to the gist of the present invention, so that detailed description thereof is omitted.

The ETC roadside device 30 is a communication device that communicates with the ETC vehicle-mounted device 20 using DSRC using a 5.8 GHz band radio signal. The ETC roadside machine 30 is also known per se, and its detailed configuration is not directly related to the gist of the present invention, and therefore, detailed description thereof is omitted.

The information center 40 settles tolls for toll roads with the vehicle 90 via the ETC on-board device 20 and the ETC roadside device 30, and from the vehicle 90 via the ETC onboard device 20 and the ETC roadside device 30. The information processing apparatus receives and accumulates snow countermeasure information, and transmits the accumulated snow countermeasure information to the vehicle 90 via the ETC on-board unit 20 and the ETC roadside unit 30. The information center 40 is also known per se, and the detailed configuration thereof is not directly related to the gist of the present invention, so that detailed description thereof is omitted.

The vehicle navigation apparatus 100 processes the information received from the information center 40 via the ETC vehicle-mounted device 20 and the ETC roadside device 30 in the control circuit 8. The control circuit 8 communicates with the ETC vehicle-mounted device 20, so that the toll information, snow countermeasure information, and the like received by the ETC vehicle-mounted device 20 from the ETC roadside device 30 can be taken into the vehicle navigation device 100. Moreover, it is also possible to connect with an external network by the ETC onboard equipment 20.

The control circuit 8 is configured as a normal computer, and includes a well-known CPU (Central Processing Unit) 81, ROM (Read Only Memory) 82, RAM (Random Access Memory) 83, I / O (Input / Output) 84, and A bus line 85 for connecting these components is provided. The CPU 81 performs control based on programs and data stored in the ROM 82 and RAM 83. The ROM 82 has a program storage area 82a and a data storage area 82b. A navigation program 82p is stored in the program storage area 82a. Data necessary for the operation of the navigation program 82p is stored in the data storage area 82b. The navigation program 82p operates on the RAM 83 with the navigation program work memory 83w as a work area. In addition, when using HDD (Hard Disk Drive) for the map data input device 6, you may implement the function of ROM82 and RAM83 by HDD.

By having such a configuration, when the navigation program 82p is activated by the CPU 81 of the control circuit 8, the vehicle navigation device 100 operates the operation switch group 7 or the remote control terminal 12 by the user (driver or the like). When the route guidance process for displaying the destination route on the display device 10 is selected from the menu displayed on the display device 10, the following processing is performed. That is, when the user inputs a destination based on the map on the display device 10, the current location of the vehicle is obtained based on the satellite data obtained from the GPS receiver 5, and a process for obtaining the optimum route from the current location to the destination is performed. Done. Then, the guidance route is displayed on the road map on the display device 10 so as to guide the user to the appropriate route. In addition, the display device 10 and the audio output device 13 send a message according to the guidance during operation and the operation state.

As shown in FIG. 2, the tire pressure information receiving device 50 is provided in the main body of the vehicle 90, and the tire pressure sensor 60 is built in each tire 91 of the vehicle 90. A chain 92 can be detachably attached to each tire 91. In FIG. 2, the state where the chain 92 is attached to each of the front and rear tires 91 is illustrated, but the chain 92 is generally attached only to the drive-side tire 91. A chain transmitter 93 that can communicate with a tire pressure sensor 60 built in the tire 91 is attached to the chain 92 so that it can be recognized whether the chain 92 is attached to the tire 91. As the chain transmitter 93, for example, an RF (Radio Frequency) tag or the like is used.

FIG. 3 is a circuit block diagram showing a more detailed configuration of the tire pressure information receiving device 50 and the tire pressure sensor 60.

The tire pressure information receiving device 50 includes a receiving circuit 51, a receiving antenna 52, a power supply circuit 53, a control device 54, a memory 55, and a communication circuit for transmitting tire pressure information to the vehicle navigation device 100. 56. The power to the tire pressure information receiving device 50 is supplied from the in-vehicle battery 99.

On the other hand, the tire pressure sensor 60 includes a pressure sensor 61 for detecting the air pressure in the tire 91, an ID memory 62 in which a sensor ID (IDentification) is stored in advance to identify each tire 91, and a transmission circuit. 63, a power supply battery 64, a control device 65, and a transmission antenna 66 are provided.

The studless tire radio wave receiver 70 is configured in the same manner as the tire pressure information receiver 50 (see FIG. 3), and is similarly disposed in the main body of the vehicle 90 (see FIG. 2).

The studless tire transmitter 80 is configured in the same manner as the chain transmitter 93 and is built in the studless tire in the same manner as the tire pressure sensor 60 (see FIG. 2).

FIG. 4 is a diagram illustrating the content of snow countermeasure information stored and accumulated in the external storage device 9 and the information center 40. This snow countermeasure information includes ETC OBE ID, snow countermeasure type (chain or studless tire), attachment / detachment flag (on / off), position (latitude, longitude, altitude), and time (day, hour, minute). It consists of.

FIG. 5 is a diagram illustrating a display example of snow countermeasure information on the screen of the display device 10. In this figure, four pieces of snow countermeasure information and their positions on map data are displayed.

FIG. 6 is a flowchart illustrating the snow countermeasure information transmission / reception process of the navigation program 82p in the snow countermeasure information transmission / reception system according to the first embodiment.

FIG. 7 is a diagram for explaining the transmission / reception timing and recording timing of snow countermeasure information.

Next, the operation of the snow countermeasure information transmission / reception system according to the first embodiment configured as described above will be described with reference to FIGS.

As shown in FIG. 7, when the vehicle 90 passes through the ETC roadside machine 30 and enters the toll road (step S <b> 101 in FIG. 6; during the ETC roadside machine passing approach), the information center 40 displays the billing information of the vehicle 90. And the accumulated snow countermeasure information of the other vehicle is transmitted to the vehicle 90 via the ETC roadside device 30.

In the vehicle 90, the control circuit 8 of the vehicle navigation device 100 receives the snow countermeasure information transmitted from the ETC roadside device 30 through the ETC on-vehicle device 20 and records it in the external storage device 9 (step S102 in FIG. 6). ).

Next, based on whether or not snow countermeasure information of the host vehicle 90 has already been recorded in the external storage device 9, the control circuit 8 has the chain 92 attached to the tire 91 or the tire 91 It is determined whether or not snow measures such as changing to a studless tire are taken (step S103 in FIG. 6).

When the host vehicle 90 has not yet taken the snow countermeasure (step S103 in FIG. 6; No), the control circuit 8 displays the snow countermeasure information of the other vehicle recorded in the external storage device 9 on the display device 10. Then, the user is encouraged to take measures against snow (step S104 in FIG. 6). For example, a user who has entered Tomei Expressway from Numazu IC toward Tokyo has four snow countermeasure information displayed as dots on the text information and map data as illustrated in FIG. Recognize that measures are intensively taken. For this reason, the user views the snow countermeasure information including the position and time of the other vehicle, so that the chain 92 is attached to the tire 91 at what time on the toll road that has entered, or the tire 91 is made into a studless tire. It is possible to determine whether to take measures against snow such as replacement.

If the host vehicle 90 has already taken snow countermeasures (step S103 in FIG. 6; Yes), the control circuit 8 skips step S104 and records snow countermeasure information of other vehicles recorded in the external storage device 9. Is not displayed on the display device 10. That is, the user is not prompted to take measures against snow on the vehicle 90.

When the vehicle 90 travels on a toll road and approaches the position and time at which snow measures should be taken, the user temporarily stops the vehicle 90 and attaches the chain 92 to the tire 91 or replaces the tire 91 with a studless tire. To take measures against snow.

Then, the radio wave transmitted from the transmitter 93 attached to the chain 92 is received by the tire pressure sensor 60 built in the tire 91, and the tire pressure sensor 60 is in the tire pressure information receiving device 50 in the main body of the vehicle 90. The chain wave presence / absence information is transmitted to the tire 91. Alternatively, the studless tire transmitter 80 built in the studless tire transmits radio waves to the studless tire radio wave receiver 70 in the main body of the vehicle 90.

In the vehicle 90, the control circuit 8 of the vehicle navigation device 100 detects that the chain 92 is attached to and detached from the tire 91 based on the chain radio wave presence / absence information received by the tire air pressure information receiving device 50, and the vehicle at the time of detection is detected. The position and time of 90 are recorded in the external storage device 9 as chain attachment / detachment information. Alternatively, it is detected that the studless tire has been attached / detached based on the presence / absence of the radio wave received by the studless tire radio wave receiver 70, and the position and time of the vehicle 90 at the time of detection are recorded in the external storage device 9 as studless tire detachment information. (Step S105 in FIG. 6). The position of the vehicle 90 is obtained from the position detector 1, and the time is obtained from a built-in timer (not shown) of the CPU 81.

As shown in FIG. 7, when the vehicle 90 passes through the ETC roadside device 30 and exits the toll road, the control circuit 8 of the vehicle navigation device 100 receives information via the ETC onboard device 20 and the ETC roadside device 30. Settling tolls for toll roads with the center 40 and transmitting snow countermeasure information of the host vehicle 90 recorded in the external recording device 9 to the information center 40 via the ETC on-board unit 20 and the ETC roadside unit 30. (Step S106 in FIG. 6).

The information center 40 accumulates snow countermeasure information for a plurality of vehicles 90.

Note that the control circuit 8 of the vehicle navigation device 100 uses the snow countermeasure information stored in the external storage device 9 when the vehicle 90 passes the ETC roadside unit 30 and leaves the toll road or for a predetermined time ( For example, the data is automatically deleted after 1 day).

According to the first embodiment, since the vehicle 90 can know the position and time at which another vehicle attaches the chain to the tire or replaces the tire with the studless tire on the toll road, the vehicle 90 pays for it. It is possible to take measures against snow by attaching a chain 92 to the tire 91 at an accurate position and time in the road, or by replacing the tire 91 with a studless tire.

FIG. 8 is an overall configuration diagram of the snow countermeasure information transmission / reception system according to the second embodiment of the present invention. The snow countermeasure information transmission / reception system according to the second embodiment includes a vehicle navigation device 100, an inter-vehicle communication device 110, a tire pressure information receiving device 50, a tire pressure sensor 60, a chain transmitter 93, and a studless tire radio wave. The main part is comprised from the receiver 70 and the studless tire transmitter 80. FIG.

The inter-vehicle communication device 110 is a device that communicates between the vehicles 90 and 90 using a short-range communication technology such as millimeter wave radar. The inter-vehicle communication device 110 is known per se, and the detailed configuration thereof is not directly related to the gist of the present invention, and therefore the detailed description thereof is omitted.

FIG. 9 is a flowchart illustrating the snow countermeasure information transmission / reception process of the navigation program 82p in the snow countermeasure information transmission / reception system according to the second embodiment.

Next, with regard to the operation of the snow countermeasure information transmission / reception system according to the second embodiment configured as described above, with reference to FIGS. 8 and 9, focusing on differences from the operation of the snow countermeasure information transmission / reception system according to the first embodiment. While explaining.

When the host vehicle 90 equipped with the inter-vehicle communication device 110 on the toll road faces another vehicle equipped with the inter-vehicle communication device 110 (step S201 in FIG. 9; when facing the other vehicle on the toll road), vehicle navigation The control circuit 8 of the device 100 transmits the snow countermeasure information of the host vehicle 90 recorded in the external storage device 9 to the other vehicle through the inter-vehicle communication device 110, and the snow countermeasure information transmitted from the other vehicle is transmitted to the vehicle. The information is received through the inter-vehicle communication device 110, and the snow countermeasure information of the other vehicle is recorded in the external storage device 9 (step S202 in FIG. 9).

Next, based on whether or not snow countermeasure information of the host vehicle 90 has already been recorded in the external storage device 9, the control circuit 8 has the chain 92 attached to the tire 91 or the tire 91 It is determined whether or not snow measures such as changing to a studless tire are taken (step S203 in FIG. 9).

When the host vehicle 90 has not yet taken the snow countermeasure (step S203 in FIG. 9; No), the control circuit 8 displays the snow countermeasure information of the other vehicle recorded in the external storage device 9 on the display device 10. Then, the user is encouraged to take measures against snow (step S204 in FIG. 9). The user looks at the snow countermeasure information including the position and time of the other vehicle, attaches the chain 92 to the tire 91, and replaces the tire 91 with a studless tire at what time and position on the toll road that has entered. Judge whether to take snow measures such as.

When the host vehicle 90 has already taken snow countermeasures (step S203 in FIG. 9; Yes), the control circuit 8 skips step S204 and records snow countermeasure information of other vehicles recorded in the external storage device 9. Is not displayed on the display device 10. That is, the user is not prompted to take measures against snow on the vehicle 90.

When the vehicle 90 travels on a toll road and approaches the position and time at which snow measures should be taken, the user temporarily stops the vehicle 90 and attaches the chain 92 to the tire 91 or replaces the tire 91 with a studless tire. To take measures against snow.

Then, the radio wave transmitted from the transmitter 93 attached to the chain 92 is received by the tire pressure sensor 60 built in the tire 91, and the tire pressure sensor 60 is in the tire pressure information receiving device 50 in the main body of the vehicle 90. Send chain radio wave presence / absence information. Alternatively, the studless tire transmitter 80 built in the studless tire transmits radio waves to the studless tire radio wave receiver 70 in the main body of the vehicle 90.

In the vehicle 90, the control circuit 8 of the vehicle navigation device 100 detects that the chain 92 is attached to and detached from the tire 91 based on the chain radio wave presence / absence information received by the tire air pressure information receiving device 50, and the vehicle at the time of detection is detected. The position and time of 90 are recorded in the external storage device 9 as chain attachment / detachment information. Alternatively, it is detected that the studless tire has been attached / detached based on the presence / absence of the radio wave received by the studless tire radio wave receiver 70, and the position and time of the vehicle 90 at the time of detection are recorded in the external storage device 9 as studless tire detachment information. (Step S205 in FIG. 9). The position of the vehicle 90 is obtained from the position detector 1, and the time is obtained from a built-in timer (not shown) of the CPU 81.

Note that the control circuit 8 of the vehicle navigation device 100 automatically deletes the snow countermeasure information stored in the external storage device 9 after a predetermined time (for example, one day) has elapsed.

According to the second embodiment, if vehicles 90 can communicate with each other between vehicles, not only tollgates on toll roads, but also vehicles 90 can exchange snow countermeasure information with each other. The position and time at which the chain is attached to the tire or the tire is replaced with a studless tire is directly notified from the other vehicle, so that the position and time at which the vehicle encounters snow can be known immediately. Snow measures such as attaching a chain to a tire or replacing a tire with a studless tire can be immediately implemented.

The embodiments of the present invention have been described above. However, these are merely examples, and the present invention is not limited to them, and the knowledge of those skilled in the art can be used without departing from the spirit of the claims. Various modifications based on this are possible.

The block diagram which shows the structure of the snow countermeasure information transmission / reception system which concerns on Example 1 of this invention. The figure which shows the arrangement | positioning aspect of the tire pressure information receiver in FIG. 1, and a tire pressure sensor. The circuit block diagram which shows the further detailed structure of the tire pressure information receiver in FIG. 1, and a tire pressure sensor. The figure which illustrates the content of the snow countermeasure information memorize | stored and accumulate | stored in the external storage device and information center in FIG. The figure which shows the example of a display of the snow countermeasure information on the screen of the display apparatus in FIG. 5 is a flowchart showing snow countermeasure information transmission / reception processing of the navigation program in the first embodiment. The figure explaining the transmission / reception timing and recording timing of snow countermeasure information in Example 1. FIG. The whole block diagram of the snow countermeasure information transmission / reception system which concerns on Example 2 of this invention. 9 is a flowchart showing snow countermeasure information transmission / reception processing of the navigation program in the second embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Position detector 2 Geomagnetic sensor 3 Gyroscope 4 Distance sensor 5 GPS receiver 6 Map data input device 7 Operation switch group 8 Control circuit 9 External storage device 10 Display device 11 Remote control sensor 12 Remote control terminal 13 Audio output device 20 ETC in-vehicle device 30 ETC roadside machine 40 Information center 50 Tire pressure information receiving device 60 Tire pressure sensor 70 Studless tire radio wave receiving device 80 Studless tire transmitter 90 Vehicle 91 Tire 92 Chain 93 Chain transmitter 100 Vehicle navigation device 110 Inter-vehicle communication device

Claims (14)

Snow countermeasure information transmitting means for determining whether or not snow countermeasures are taken on a vehicle tire and transmitting snow countermeasure information; and snow countermeasure information receiving means for receiving snow countermeasure information transmitted from the snow countermeasure information transmitting means Storage means for recording the snow countermeasure information; display means for displaying the snow countermeasure information; and sending the snow countermeasure information to the ETC roadside machine when leaving the toll road, and the ETC roadside when entering the toll road A vehicle comprising an ETC on-vehicle device that receives the snow countermeasure information from a machine;
The snow countermeasure information transmitted from the ETC on-board device when the vehicle leaves the toll road is received and accumulated via an ETC roadside device, and the snow accumulated when the vehicle enters the toll road A snow countermeasure information transmission / reception system comprising: an information center that transmits countermeasure information to the ETC vehicle-mounted device via an ETC roadside device. ETC on-board equipment that performs toll payment for toll roads by communication with an ETC roadside device, a chain transmitter attached to a chain, a tire pressure sensor that detects radio waves transmitted from the chain transmitter, A tire pressure information receiving device for receiving chain wave presence / absence information from a tire pressure sensor, and detecting that a chain has been attached to and detached from a tire based on the chain wave presence / absence information received by the tire pressure information receiving device. The position and time of the vehicle is stored as chain attachment / detachment information, the chain attachment / detachment information is transmitted from the ETC on-vehicle device as snow countermeasure information when leaving the toll road, and the snow is taken by the ETC on-vehicle device when entering the toll road. A vehicle comprising a vehicle navigation device for receiving and displaying countermeasure information;
The snow countermeasure information transmitted from the ETC on-board device when the vehicle leaves the toll road is received and accumulated via an ETC roadside device, and the snow accumulated when the vehicle enters the toll road A snow countermeasure information transmission / reception system comprising: an information center that transmits countermeasure information to the ETC vehicle-mounted device via an ETC roadside device. ETC in-vehicle device that performs toll payment on toll road by communication with ETC roadside machine, studless tire transmitter attached to studless tire, and studless tire radio wave that receives radio waves transmitted from the studless tire transmitter It detects that the studless tire has been attached / detached based on the presence / absence of radio waves received by the receiving device and the studless tire radio wave receiving device, stores the position and time of the vehicle at the time of detection as studless tire attaching / detaching information, A vehicle navigation device that transmits the studless tire attachment / detachment information as snow countermeasure information from the ETC on-vehicle device when leaving the toll road, and receives and displays the snow countermeasure information by the ETC on-vehicle device when entering the toll road; A vehicle comprising:
The snow countermeasure information transmitted from the ETC on-board device when the vehicle leaves the toll road is received and accumulated via an ETC roadside device, and the snow accumulated when the vehicle enters the toll road A snow countermeasure information transmission / reception system comprising: an information center that transmits countermeasure information to the ETC vehicle-mounted device via an ETC roadside device. ETC on-board equipment that performs toll payment for toll roads by communication with an ETC roadside machine, a chain transmitter attached to a chain, a tire pressure sensor that detects radio waves transmitted from the chain transmitter, A tire pressure information receiving device that receives chain radio wave presence / absence information from a tire pressure sensor, a studless tire transmitter attached to a studless tire, and a studless tire radio signal receiving device that receives a radio wave transmitted from the studless tire transmitter Detecting that the chain has been attached / detached to / from the tire based on the chain radio wave presence / absence information received by the tire pressure information receiving device, storing the position and time of the vehicle at the time of detection as chain attachment / detachment information, Based on the presence of radio waves received by the receiver It detects that the studless tire has been attached / detached, stores the position and time of the vehicle at the time of detection as studless tire attachment / detachment information, and when the vehicle leaves the toll road, the chain attachment / detachment information and the studless tire attachment / detachment information are used as snow countermeasure information. A vehicle equipped with a vehicle navigation device that transmits from the ETC on-board device and receives and displays the snow countermeasure information by the ETC on-board device when entering a toll road;
The snow countermeasure information transmitted from the ETC on-board device when the vehicle leaves the toll road is received and accumulated via an ETC roadside device, and the snow accumulated when the vehicle enters the toll road A snow countermeasure information transmission / reception system comprising: an information center that transmits countermeasure information to the ETC vehicle-mounted device via an ETC roadside device. The snow countermeasure information includes an ETC on-board device ID, a snow countermeasure type indicating whether a chain or a studless tire, an attachment / detachment flag indicating whether wearing or removing, a position consisting of latitude, longitude and altitude, date, hour, The snow countermeasure information transmission / reception system according to any one of claims 1 to 4, comprising a time consisting of minutes and seconds. When entering the toll road, if the snow countermeasure information stored in the host vehicle indicates that the tire has snow countermeasures, the snow countermeasure information received by the ETC on-board device is hidden. The snow countermeasure information transmission / reception system according to any one of claims 1 to 5. If the vehicle includes an inter-vehicle communication device and snow countermeasure information is stored in the host vehicle, the snow countermeasure information is transmitted to another vehicle by inter-vehicle communication, and if the snow countermeasure information is stored in the other vehicle. The snow countermeasure information transmission / reception system according to any one of claims 1 to 6, wherein the snow countermeasure information is received from another vehicle by inter-vehicle communication and displayed on the own vehicle. A snow countermeasure information transmitting means for determining whether or not the tire of the vehicle has snow countermeasures and transmitting the snow countermeasure information;
Snow countermeasure information receiving means for receiving snow countermeasure information transmitted from the snow countermeasure information transmitting means;
Storage means for recording the snow countermeasure information;
Display means for displaying the snow countermeasure information;
When the vehicle leaves the toll road, the snow countermeasure information is transmitted to the information center via the ETC roadside device, and when the vehicle enters the toll road, the snow countermeasure information from the information center is received via the ETC roadside device. A vehicle comprising: an ETC in-vehicle device. ETC on-board equipment that performs toll road toll payment by communication with ETC roadside devices,
A chain transmitter attached to the chain;
A tire pressure sensor for detecting radio waves transmitted from the chain transmitter;
Tire pressure information receiving device for receiving chain radio wave presence / absence information from the tire pressure sensor;
It detects that the chain has been attached / detached to / from the tire based on the chain air wave presence / absence information received by the tire pressure information receiver, stores the position and time of the vehicle at the time of detection as chain attachment / detachment information, and exits the toll road A vehicle navigation device that sometimes transmits the chain attachment / detachment information as snow countermeasure information from the ETC on-vehicle device and receives and displays the snow countermeasure information by the ETC on-vehicle device when entering a toll road. Vehicle. An on-board ETC device that performs toll road toll payment by communication with an ETC roadside device,
A studless tire transmitter attached to the studless tire;
A studless tire radio wave receiver for receiving radio waves transmitted from the studless tire transmitter;
Based on the presence or absence of radio waves received by the studless tire radio wave receiving device, it is detected that the studless tire has been attached / detached, the vehicle position and time at the time of detection are stored as studless tire attachment / detachment information, A vehicle navigation device which transmits the studless tire attachment / detachment information as snow countermeasure information from the ETC on-board device when leaving, and receives and displays the snow countermeasure information by the ETC on-board device when entering a toll road. Characteristic vehicle. ETC on-board equipment that performs toll road toll payment by communication with ETC roadside devices,
A chain transmitter attached to the chain;
A tire pressure sensor for detecting radio waves transmitted from the chain transmitter;
Tire pressure information receiving device for receiving chain radio wave presence / absence information from the tire pressure sensor;
A studless tire transmitter attached to the studless tire;
A studless tire radio wave receiver for receiving radio waves transmitted from the studless tire transmitter;
It detects that the chain has been attached / detached to / from the tire based on the chain air wave presence / absence information received by the tire pressure information receiving device, stores the position and time of the vehicle at the time of detection as chain attachment / detachment information, and receives the studless tire electric wave reception Based on the presence or absence of radio waves received by the device, it detects that the studless tire has been attached / detached, stores the vehicle position and time at the time of detection as studless tire attachment / detachment information, and attaches / detaches the chain when the vehicle leaves the toll road A vehicle navigation device that transmits the information and the studless tire attachment / detachment information as snow countermeasure information from the ETC vehicle-mounted device, and receives and displays the snow countermeasure information by the ETC vehicle-mounted device when entering a toll road. Characteristic vehicle. The snow countermeasure information includes an ETC on-board device ID, a snow countermeasure type indicating whether a chain or a studless tire, an attachment / detachment flag indicating whether wearing or removing, a position consisting of latitude, longitude and altitude, date, hour, The vehicle according to any one of claims 8 to 11, which is composed of a time consisting of minutes and seconds. When entering the toll road, if the snow countermeasure information stored in the host vehicle indicates that the tire has snow countermeasures, the snow countermeasure information received by the ETC on-board device is hidden. The vehicle according to any one of claims 8 to 12. If a vehicle-to-vehicle communication device is provided and snow countermeasure information is stored in the host vehicle, the snow countermeasure information is transmitted to another vehicle by inter-vehicle communication, and if snow countermeasure information is stored in another vehicle, the snow The vehicle according to any one of claims 8 to 13, wherein the countermeasure information is received from another vehicle by inter-vehicle communication and displayed on the own vehicle.