JPH09245292A - On-vehicle navigation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a navigation device which is capable of facilitating the selection of the information obtained from a road communication equipment. SOLUTION: A CPU 1 estimates the present location of a present vehicle and acquires validity information to be used when the validity of the information obtained from road communication equipments 31, 33 is judged. The information obtained from the road communication equipments 31, 33 and the acquired validity information is displayed on the road map of a liquid crystal panel 27 with the estimated present location.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an on-vehicle navigation device that estimates the current position of a vehicle such as an automobile and displays it on a road map of a display device to inform the occupant of the vehicle. Traffic information obtained from road communication devices such as optical beacons or radio beacons installed at appropriate intervals along the road, and validity information used to determine the validity of the traffic information The present invention relates to a vehicle-mounted navigation device that can facilitate selection of information by displaying it together with a position.

[0002]

2. Description of the Related Art Recently, for example, by estimating the current position of a vehicle such as an automobile, displaying it on a road map of a display device and notifying the passenger of the current position, the vehicle can be aimed at even on a strange land without getting lost. In-vehicle navigation devices, which support the smooth arrival to the ground, are rapidly spreading.

In this vehicle-mounted navigation device,
In addition to the basic functions that inform the occupant of the current position of the vehicle as described above, for example, if a destination is set, a recommended route from the current position to the destination is automatically searched from the map data, and along this recommended route Further convenience is being improved, such as a vehicle equipped with a route guidance function that guides and guides the vehicle to travel.

On the other hand, recently, a new traffic management system intended for smoothing traffic flow and improving safety by collecting and providing information by road-to-vehicle communication for vehicles such as automobiles, Environmental improvements such as so-called UTMS, road traffic information communication system, and so-called VICS are being promoted under the initiative of government agencies such as the National Police Agency.

According to this VICS, traffic information such as road congestion information and vacant parking lot information is real-time in real time through an on-road communication device such as an optical beacon or a radio wave beacon as an information providing medium, or FM multiplex broadcasting. It is provided to passengers through a transceiver mounted on each vehicle. By obtaining this traffic information, the occupant can operate the own vehicle while making an appropriate judgment, for example, bypassing a traffic jam or moving the own vehicle toward an empty parking lot. , VI
It is expected that the introduction of CS will significantly improve convenience.

Therefore, the traffic information obtained by the above-mentioned VICS is fetched into the above-mentioned vehicle-mounted navigation device and obtained by VICS together with the present position of the vehicle on the road map of the display of the navigation device. It has been proposed to display traffic information. FIG. 4 shows an example in which the traffic information obtained by VICS is displayed together with the current position of the own vehicle. According to this proposal, as shown in the same figure, in addition to the current position of the own vehicle, for example, roads that are closed or roads that are congested are displayed in real time on the display of the navigation device, so that it is obvious. , It will make a great contribution to the safe and smooth running of the host vehicle.

[0007]

However, in the above-described conventional vehicle-mounted navigation device to which the traffic information is added, the information for judging the validity of the added traffic information and selecting it is missing. There was an inherent problem to be solved due to this.

More specifically, in the road-to-vehicle communication between the on-road communication device and the on-vehicle transceiver, the vehicle generally reaches within a communicable range where radio waves such as infrared rays or microwaves transmitted from the on-road communication device can reach. When it is established and communication is established, traffic information for a relatively narrow area such as traffic jam information and empty parking lot information within a predetermined map range centered on the roadside communication device is transmitted / received onboard. The traffic information is received by the aircraft and is displayed on the display together with the current position of the vehicle. However, in the traffic information provided by the roadside communication device,
Since the traffic situation changes from moment to moment with the passage of time, it is constantly updated, for example, at regular time intervals so as to reflect the latest traffic situation. Therefore, for example, after the traffic information is obtained from the on-road communication device, when a situation occurs such that the vehicle is stopped for one hour outside the communicable range of the on-road communication device, the traffic information displayed on the display at this time is Despite the fact that the old information, which I got an hour ago, is already useless, I could not inform the crew of this fact. On the other hand, it is possible that the traffic information obtained from the roadside communication device is information limited to a predetermined range in the traveling direction of the own vehicle, and after obtaining such traffic information, the own vehicle makes a U-turn. If you change course, there is a possibility that the traffic information that you obtained with great care will not be useful immediately, but it is not possible to inform the passenger of this fact, and as a result,
Based on the traffic information that is no longer useful, the occupant may, for example, drive the vehicle to the detour even if the traffic congestion has already been eliminated, or fill a parking lot that should have been empty. A situation may occur in which the vehicle is operated through a useless route while making an incorrect decision, such as advancing the vehicle toward It was

The present invention has been made in view of the above-mentioned circumstances, and traffic information obtained from a road communication device such as an optical beacon or a radio beacon installed at appropriate intervals along a traveling path of a vehicle. , And the effectiveness information used when determining the effectiveness thereof are displayed together with the current position of the vehicle, and it is an object of the present invention to provide a vehicle-mounted navigation device that facilitates selection of information. And

[0010]

In order to solve the above-mentioned problems, the invention according to claim 1 communicates with a plurality of on-road communication devices arranged at appropriate intervals along a traveling path of a vehicle. An in-vehicle navigation device that obtains information including traffic information from the on-road communication device by performing the position estimation means for estimating the current position of the own vehicle, and an effective value used when determining the validity of the information. Validity information obtaining means for obtaining validity information, information obtained from the roadside communication device, and validity information obtained by the validity information obtaining means, together with the current position estimated by the position estimating means, the road The gist is that the display means for displaying on a map is provided.

According to the first aspect of the invention, first, the position estimation means estimates the current position of the host vehicle, and the validity information acquisition means uses the validity used when determining the validity of the information. Information is obtained. The display unit displays the information obtained from the on-road communication device and the validity information acquired by the validity information acquisition unit on the road map together with the current position estimated by the position estimation unit. Therefore, by visually confirming various information displayed on the display means, the occupant can judge the validity of the information currently displayed, and as a result of this judgment, the information currently displayed is valid. If it is determined that there is an appropriate judgment based on the displayed information, for example, by detouring a congested road or advancing the vehicle to a vacant parking lot, an appropriate judgment can be made. While running your vehicle through the route,
If it is determined that the information currently displayed is not valid, the information that is considered invalid is discarded without consideration, and the vehicle advances on its own until new information is obtained from the next road communication device. You can As described above, according to the conventional vehicle-mounted navigation device, the useless route is selected on the basis of the information that is no longer useful, so that the own vehicle may not be able to smoothly operate. According to the invention described in (1), first, the validity is verified based on the validity information without discarding the information currently displayed, and valid information and invalid information are selected from this verification. On the basis of the information determined to be effective, the own vehicle can be driven by selecting an appropriate route, thus eliminating the above-mentioned problems of the conventional technology and maximizing the convenience of the vehicle-mounted navigation device. The vehicle can always be operated smoothly.

According to the invention of claim 2, the traffic information is transmitted from the on-road communication device by communicating with a plurality of on-road communication devices arranged at appropriate intervals along the traveling path of the vehicle. An in-vehicle navigation device that obtains information including the position estimation means for estimating the current position of the vehicle,
Based on the date and time storing means for updating and storing the date and time when the information is obtained, the date and time when the information is obtained and the current date and time stored in the date and time storing means. Then, the position estimating means estimates the elapsed time calculating means for calculating the elapsed time from the time when the information is obtained, the information obtained from the roadside communication device, and the elapsed time calculated by the elapsed time calculating means. The gist of the present invention is to include display means for displaying on the road map together with the current position.

According to the second aspect of the present invention, first, the position estimating means estimates the current position of the host vehicle, while the date and time storing means obtains new information about the date and time when the information was obtained. It is updated and stored for each time, and the elapsed time calculation means calculates the elapsed time from the acquisition time of the information to the present time based on the date and time at the acquisition time of the information stored in the date and time storage means and the current date and time. Is calculated. The display unit displays the information obtained from the roadside communication device and the elapsed time calculated by the elapsed time calculating unit on the road map together with the current position estimated by the position estimating unit. Here, the elapsed time from the time when the information is obtained to the present time is calculated because, for example, traffic information such as road congestion is generally provided and constantly updated at fixed time intervals due to traffic conditions that change from moment to moment. Therefore, if you can know the elapsed time,
This is because it can be used as a material for judging the validity of the information. Therefore, by visually confirming various information including the elapsed time displayed on the display unit, the occupant can determine the validity of the information currently displayed. As a result of this determination, when it is determined that the information currently displayed is valid, based on the displayed information, for example,
While making an appropriate judgment, such as bypassing a traffic jam or advancing your vehicle to an empty parking lot, you can drive your vehicle through an appropriate route, but the information currently displayed is not valid. If it is determined that there is no such information, the information regarded as invalid can be truncated without taking into consideration, and the vehicle can be driven by itself until new information is obtained from the next road communication device. As described above, according to the conventional vehicle-mounted navigation device, the useless route is selected based on the information that is no longer useful, so that the own vehicle may not be able to operate smoothly. According to the invention described in (1), first, the validity is verified based on the validity information without discarding the information currently displayed, and valid information and invalid information are selected from this verification. On the basis of the information determined to be effective, the own vehicle can be driven by selecting an appropriate route, thus eliminating the above-mentioned problems of the conventional technology and maximizing the convenience of the vehicle-mounted navigation device. The vehicle can always be operated smoothly.

Further, the invention according to claim 3 is characterized in that the display means adds and displays the acquisition location of the information and the type of the on-road communication device from which the information is acquired.

According to the third aspect of the invention, the display means further displays the information acquisition point and the type of the on-road communication device which is the information acquisition source. Therefore, an occupant in the vehicle compartment can know information useful for smoothly driving the own vehicle, which contributes to further improvement in convenience.

Furthermore, the invention of claim 4 is characterized in that the display means adds and displays the date and time when the information is obtained.

Moreover, the invention of claim 5 is characterized in that the display means adds and displays the effective range of the information.

According to the invention of claim 5, since the display means adds and displays the effective range of the information, the information obtained from the roadside communication device is limited to a predetermined range in the traveling direction of the vehicle. Even if it is said, the effective range of the given information can be recognized at a glance.

The invention of claim 6 is characterized in that the roadside communication device includes an optical beacon and a radio wave beacon.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a vehicle-mounted navigation device according to the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a block diagram showing a vehicle-mounted navigation device according to the present invention, FIG. 2 is an operation flowchart of the vehicle-mounted navigation device according to the present invention, and FIG.
It is a figure with which an on-vehicle navigation device concerning the present invention is explained.

To begin with, the vehicle-mounted navigation device according to the present invention displays the current position of the vehicle obtained by using dead-reckoning navigation or satellite navigation on a road map and notifies the occupant of the current position. In this way, a navigation function that helps a vehicle to reach a destination smoothly without getting lost even on a strange land, a road communication device such as an optical beacon or a radio wave beacon as an information providing medium, or an FM multiplex broadcasting medium is provided. Then, the traffic information acquisition function that acquires traffic information such as road congestion information and vacant parking information, the traffic information acquired using the traffic information acquisition function, and the effectiveness information that is the basis for determining its effectiveness, It has an additional information provision function that displays it on the road map together with the current position of the own vehicle,
By notifying the occupant of the validity information about various information provided by the additional information providing function, selection of information is facilitated. In order to realize the above-mentioned various functions, the vehicle-mounted navigation device according to the present invention,
As shown in FIG. 1, a CPU 1 is provided, and this CPU 1
In response to operation instructions from the group of operation switches, data such as the turning angle and travel distance of the own vehicle and map data are input from various sensors, and the current position of the own vehicle is obtained based on these input data. Acquiring traffic information through an on-road communication device such as beacon or radio beacon, or FM multiplex broadcasting, and obtaining traffic information through an optical beacon transceiver or radio beacon transceiver or FM multiplex receiver mounted on the vehicle The validity of the information, such as the elapsed time from the time of acquisition to the present, the acquisition location, the effective range of the information, the type of the on-road communication device from which the information is acquired, etc. In accordance with the position, processing such as displaying the acquired traffic information and its validity information on the liquid crystal panel is executed.

More specifically, the CPU 1 includes a GPS receiver 3 for receiving satellite radio waves transmitted from the plurality of GPS satellite groups to the ground at all times, and a piezoelectric vibration gyroscope for detecting the turning angle of the vehicle. Various sensors such as a gyro sensor 5 and a distance sensor 7 for detecting the moving distance of the vehicle are connected, and an operation switch group 9 used for performing various settings such as route setting in the navigation function is connected. It Furthermore, CPU1
Includes a CD-ROM driver 13 for reading out the map data 11 stored in a storage medium such as a CD-ROM, a ROM 15 for storing various processing programs, an optical beacon transceiver 19 described below, or a radio beacon transceiver. 21
The RAM 17 that temporarily stores data such as the traffic information and its validity information obtained from the computer is connected.

On the other hand, in the CPU 1, the optical beacon 31 or the electric wave beacon 33, which is installed at an appropriate interval along the traveling path of the vehicle, transmits the electric wave such as infrared rays or microwaves to the optical beacon 31 or the electric wave beacon 31. An optical beacon transceiver 19 and a radio beacon transceiver 21 for receiving local traffic information transmitted in a relatively narrow area centered on a point where each of the radio beacons 33 is located.
And a switch controller 23 for switching the operation modes of these transceivers 19 and 21 by an operation input, and FM broadcast radio waves from FM broadcast stations installed in various places in Japan as a medium for transmission over a wide area. FM multiplex receiver 25 for receiving wide area traffic information and local traffic information, wide area traffic information, in addition to the current position of the vehicle.
Also, a liquid crystal panel 27 that displays validity information regarding the traffic information currently displayed is connected. In addition, optical beacon 31
Alternatively, as the local traffic information provided from the radio wave beacon 33, for example, road congestion information, traffic closure information, accident location information, road construction information, and information about the installation location and type of road communication devices existing in the vicinity, etc. On the other hand, the wide area traffic information provided from FM multiplex broadcasting includes, for example, traffic congestion information on the Tokyo Metropolitan Expressway and the Tomei Expressway, road closure information, accident location information, and road construction information. When displaying the current position of the own vehicle on the road map of the liquid crystal panel 27, the position mark 29 in the form of an arrow is placed at a predetermined position on the road on the map including the vicinity of the current position. At this time, the position mark 29 indicates the current position of the host vehicle on the road on the map, while the direction of the arrow indicates the traveling direction of the host vehicle.

Next, the operation of the vehicle-mounted navigation device according to the present invention will be described in detail with reference to FIGS.

First, as shown in FIG.
The satellite radio wave data, the turning angle of the host vehicle, and the moving distance are input via the PS receiver 2, the gyro sensor 5, and the distance sensor 7, respectively (step S1). next,
The CPU 1 obtains the current position of the own vehicle by using the dead reckoning method based on the data of the turning angle and the moving distance of the own vehicle input in step S1, while the plurality of CPUs input via the GPS receiver 3 are used. The two-dimensional or three-dimensional current position of the vehicle is obtained using the satellite navigation method based on the arrival time difference between the radio waves from the GPS satellites. Furthermore, CP
The U1 compares and verifies the accuracy of the respective current positions obtained from the dead reckoning navigation and the satellite navigation, and executes a process of determining the current position with higher accuracy as the current position of the host vehicle (step S3). In the current position calculation process of step S3, for example, the vehicle is traveling in a place where it is difficult to receive radio waves from the GPS satellite group such as a building street, and three or more G
When radio waves cannot always be received from PS satellites, the current position obtained using the dead reckoning method is adopted, while
When the vehicle is traveling in a place such as the suburbs where it is easy to receive radio waves from GPS satellites and can receive radio waves from three or more GPS satellites at all times, the current position obtained using the satellite navigation method is Adopted.

Next, the CPU 1 transfers the new traffic information through the optical beacon 31 or the radio beacon 33 and through the optical beacon transceiver 19 or the radio beacon transceiver 21 to determine whether the traffic information is updated. The process of determining is executed (step S5). Here, the optical beacon transmitter / receiver 19 or the radio wave beacon transmitter / receiver 21 determines whether or not the own vehicle is within the communicable range of the beacons 31 and 33 in order to obtain all the information transmitted from the beacons 31 and 33. Regardless of whether or not the vehicle is always in a standby state or when the host vehicle reaches within the communicable range of the beacons 31 and 33 in order to reduce the average power consumption of the transceivers 19 and 21. The traffic information is obtained from the beacons 31 and 33 by raising the operation mode from the dormant state to the reception waiting state.

If the result of determination in step S5 is that the traffic information has not been updated, the CPU 1 jumps to the next step S7 and advances the processing to step S9, while determining that the traffic information has been updated. When done,
The CPU 1 combines the date and time at the time of updating the traffic information, that is, the date and time, with the acquired traffic information, and RA
A process of storing in a predetermined address of M17 is executed (step S7).

Next, the CPU 1 refers to the date and time at the time of updating the traffic information read from the RAM 17 and the current date and time, and executes a process of calculating the elapsed time from the time of updating the traffic information to the present ( Step S9). In addition,
As a result of the determination in step S5, when it is determined that the traffic information has not been updated, the elapsed time from the last update time of the traffic information to the present is calculated. Here, the elapsed time from the time when the traffic information is updated to the present time is calculated because, in general, traffic information such as road congestion is provided, for example, constantly updated at fixed intervals due to traffic conditions that change from moment to moment. Therefore, if the elapsed time can be known, it can be used as a basis for judging the reliability or validity of the information.

In step S9, when the elapsed time from the last update of the traffic information to the present is calculated, CP
In addition to the current position of the own vehicle obtained in step S3, the U1 displays the obtained traffic information and the validity information such as the elapsed time, the acquisition point, and the type of the on-road communication device from which the information is acquired on the liquid crystal panel. 27 executes the processing displayed on the screen. By visually confirming the various information displayed here, the occupant can judge the reliability and validity of the traffic information currently displayed, and as a result of this judgment, the traffic information currently displayed is If it is determined to be valid, based on the displayed traffic information, for example, bypassing a congested road,
While making an appropriate judgment, such as advancing the vehicle to an empty parking lot, while driving the vehicle through an appropriate route, it is determined that the traffic information currently displayed is not valid. , The traffic information that is considered invalid is discarded without taking into consideration, and the vehicle advances by itself until new traffic information is obtained from the next road communication device. Therefore,
Conventionally, on the basis of information that is no longer useful, there is a risk that smooth vehicle operation may not be possible due to the useless route selection, whereas the on-vehicle navigation device according to the present invention is Instead of relying on traffic information, first verify the reliability and effectiveness based on the effectiveness information, and from this verification, select valid and invalid information to determine that it is valid. On the basis of,
Since the own vehicle can be driven by selecting an appropriate route, the conventional problems can be eliminated, the convenience of the on-vehicle navigation device can be maximized, and the own vehicle can always be operated smoothly.

When displaying the validity information relating to the traffic information currently being displayed, for example, as shown in FIG. 1, the information acquisition point and the type of the on-road communication device from which the information is acquired are shown in FIG. In addition to displaying with the symbol mark as shown, the outer circle of the symbol mark is emphasized as double or this mark can be distinguished at a glance that it is the source of the traffic information currently displayed. The color of the mark can be emphasized to make it stand out. Furthermore, from the time when the traffic information is obtained to the present, using a display form such as +3 (in this case, it means that 3 minutes have elapsed) near the symbol mark or at an appropriate position such as a corner of the screen. Displays the elapsed time of. At this time, the date and time when the information was obtained can be displayed together with the display of the elapsed time. Furthermore, it is also possible to inform the type of information currently displayed by displaying "traffic" in the corner of the screen, for example, as shown in FIG.

On the other hand, the traffic information obtained from the on-road communication device is a new traffic management system, so-called UTMS (Un
universal Traffic Management
In the case of the information provided by (tSystems), the information may be limited to a predetermined range in the traveling direction of the host vehicle. In this case, for example, as shown in FIG. 3, the effective range 35 of the given information is centered on the information acquisition point and the traveling direction of the host vehicle at the time of information acquisition is referred to, for example, 5 km ahead in the traveling direction, And backward 1
The effective range 35 is clearly displayed by setting a range surrounded by km and surrounding the effective range 35 with a frame line, or by thinly coloring the area within the frame line with a color different from the surrounding color. be able to. If you do this,
The effective range 35 of the given information can be recognized at a glance.

Further, when a plurality of pieces of information are displayed on one screen at the same time, for example, when the parking lot vacant information and the installation condition of the roadside communication device are displayed at the same time, the parking lot vacant information is short distance from the source However, it is expected that the effective status of each piece of information will be different, such as the installation status of roadside communication devices being provided over a relatively long distance from the source. . In this case, by enclosing the effective range of individual information with frame lines of mutually different colors, or by emphasizing the individual areas within the frame lines as colors different from each other and the surrounding color. Due to
The effective range 35 can be clearly displayed.

The traffic information obtained by the above-mentioned series of processing programs and the display duration of the validity information are updated every moment as the current position of the vehicle progresses, so these information are updated. Can be displayed outside the map display range of the liquid crystal panel 27, or can be continuously displayed until new traffic information is obtained from the next road communication device. Also, the liquid crystal panel 2
The information to be displayed on 7 includes a road communication device that has already communicated, a road communication device that is expected to communicate next, or a location of a road communication device that is located within a predetermined range in the traveling direction of the vehicle. The types can be displayed in appropriate combination. At the time of this display, for example, as shown in FIG. 1, the type of the road communication device is displayed by making the symbol marks of the optical beacon 31 and the radio wave beacon 33 different from each other, or it has already been displayed. It is also possible to display the installation location and the type of the on-road communication device that has already been communicated or the next on-road communication device is expected to be communicated, in mutually different display colors.

Further, in the present embodiment, the form in which the elapsed time from the point of information acquisition to the present is displayed as, for example, +3 at an appropriate position near the symbol mark or in the corner of the screen has been exemplified. The present invention is not limited to this, for example, the display color of the symbol mark,
10 depending on the time elapsed from the time of information acquisition to the present
By making them different from each other, such as blue for less than 10 minutes, yellow for more than 10 minutes and less than 30 minutes, and red for more than 30 minutes.
The elapsed time can also be displayed.

Finally, in the present embodiment, the vehicle-mounted navigation device is effective for 10 minutes or less depending on the elapsed time from the time when the information is obtained to the present time, for example, 10 minutes or more are exceeded.
Set a criterion for information such as caution within 0 minutes and invalidity for more than 0 minutes, and let the validity of information be judged according to this criterion, and display the result of this judgment on the screen, for example. Alternatively, the occupant may be notified via a voice message such as "This information is valid."

[0037]

According to the invention of claim 1, the occupant can judge the validity of the information currently displayed by visually confirming various information displayed on the display means. As a result of the judgment, if the information currently displayed is judged to be valid, based on the displayed information, for example, detouring a congested road or advancing the vehicle to an empty parking lot. While driving the vehicle through an appropriate route while making an appropriate judgment, for example, if it is judged that the information currently displayed is not valid, without considering the information considered invalid It can be truncated and the vehicle can proceed by itself until new information is obtained from the next road communication device. As described above, according to the conventional vehicle-mounted navigation device, the useless route is selected on the basis of the information that is no longer useful, so that the own vehicle may not be able to smoothly operate. According to the invention described in (1), first, the validity is verified based on the validity information without ruling the information currently displayed.
From this verification, valid information and invalid information can be selected and discarded, and based on the information determined to be valid, it is possible to select the appropriate route and drive the host vehicle. It can be wiped out, the convenience of the vehicle-mounted navigation device can be maximized, and the own vehicle can always be operated smoothly.

According to the invention of claim 2, the occupant can judge the validity of the information currently displayed by visually confirming various information including the elapsed time displayed on the display means. You can That is, for example, traffic information such as road congestion is generally updated and provided at regular intervals due to traffic conditions that change from moment to moment, so if the elapsed time can be known, the validity of the information will be improved. This is because it can be used as a judgment material. As a result of this determination, if it is determined that the information currently displayed is valid,
Based on the displayed information, for example, bypassing a congested road or advancing your vehicle to an available parking lot, make an appropriate judgment and drive your vehicle through an appropriate route. If it is judged that the information currently displayed is not valid while the vehicle is operating, the information that is considered invalid is discarded without taking into consideration, and the vehicle itself is used until new information is obtained from the next roadside communication device. To proceed. As described above, according to the conventional vehicle-mounted navigation device, the useless route is selected based on the information that is no longer useful, so that the own vehicle may not be able to operate smoothly. According to the invention described in (1), first, the validity is verified based on the elapsed time without rubbing the currently displayed information, and valid information and invalid information are selected from this verification. , It is possible to drive the own vehicle by selecting an appropriate route based on the information determined to be effective, so that the problems of the above-described conventional technology can be eliminated, and the convenience of the in-vehicle navigation device can be maximized, The own vehicle can be operated smoothly.

Further, according to the invention of claim 3, the display means further adds and displays the information acquisition point and the type of the on-road communication device from which the information is acquired. Therefore, it is possible to know the information that is useful for making the own vehicle travel smoothly, which contributes to further improvement in convenience.

According to the invention of claim 5, since the display means adds and displays the effective range of the information, the information obtained from the roadside communication device is limited to a predetermined range in the traveling direction of the vehicle. Even when it is determined that the information has been given, the effective range of the given information can be recognized at a glance, which is an extremely excellent effect.

[Brief description of drawings]

FIG. 1 is a block configuration diagram showing a vehicle-mounted navigation device according to the present invention.

FIG. 2 is an operation flowchart of the vehicle-mounted navigation device according to the present invention.

FIG. 3 is a diagram for explaining an in-vehicle navigation device according to the present invention.

FIG. 4 is a diagram showing a display example of traffic information obtained by VICS.

[Explanation of symbols]

 1 CPU 3 GPS receiver 5 Gyro sensor 7 Distance sensor 9 Operation switch group 11 Map data 13 CD-ROM driver 15 ROM 17 RAM 19 Optical beacon transceiver 21 Radio beacon transceiver 23 Switch controller 25 FM multiplex receiver 27 Liquid crystal panel 29 Position mark 31 Optical beacon 33 Radio beacon 35 Effective range

Claims (6)

[Claims] 1. An in-vehicle navigation system that obtains information including traffic information from a road communication device by communicating with a plurality of road communication devices arranged at appropriate intervals along a road on which a vehicle travels. A device, a position estimating means for estimating the current position of the own vehicle, an effectiveness information acquiring means for acquiring the effectiveness information used in determining the effectiveness of the information, and obtained from the roadside communication device. And a display unit for displaying the information and the validity information acquired by the validity information acquisition unit on the road map together with the current position estimated by the position estimation unit. Navigation device. 2. An in-vehicle navigation system that obtains information including traffic information from a road communication device by communicating with a plurality of road communication devices arranged at appropriate intervals along a traveling path of a vehicle. A device for estimating a current position of the host vehicle, a date and time storage means for updating and storing the date and time at which the information is obtained each time new information is obtained, and the date and time storage means. Based on the date and time at the time of acquisition of the information stored in, and the current date and time, elapsed time calculation means for calculating the elapsed time from the time of acquisition of the information to the present, information acquired from the roadside communication device, and the A vehicle-mounted navigation device comprising: a display unit that displays the elapsed time calculated by the elapsed time calculation unit on the road map together with the current position estimated by the position estimation unit. 3. The display means is a point of acquisition of the information,
3. The on-vehicle navigation device according to claim 1, further comprising: a road communication device that is a source of information and a type of the road communication device. 4. The vehicle-mounted navigation device according to claim 1, wherein the display unit additionally displays the date and time when the information was acquired. 5. The vehicle-mounted navigation device according to claim 1, wherein the display unit adds and displays the effective range of the information. 6. The vehicle-mounted navigation device according to claim 1, wherein the roadside communication device includes an optical beacon and a radio wave beacon.