JP4629130B2 - Navigation system - Google Patents

Description

  The present invention is a navigation system that detects the current position of a host vehicle mounted on a vehicle, displays it on a map on a monitor, receives beacon information from a beacon arranged on the roadside, etc., generates a sound, or displays on a monitor In particular, the present invention relates to a navigation system in which beacon information unnecessary for the vehicle at the time of receiving beacon information is excluded.

  Beacons generally include optical beacons installed on general roads and radio beacons installed on expressways, but they may differ depending on the jurisdiction of the roads, and the type is not necessarily constant. A plurality of beacon information such as current position information, destination guidance, branch information, traffic jam information, regulation information, accident information, parking lot information, character information, and simple graphic information are provided from the beacon. These beacon information can be identified by data called “information type” (optical beacon) or “major section ID” (radio wave beacon). For example, destination information and branching information are directly related to the road you are traveling on, so if you receive beacon information installed on a nearby highway while driving on a general road Even if displayed, it is meaningless, rather it is considered that not displaying will not hinder driving.

  As a conventional navigation system for solving the above-mentioned problems, there is one described in Japanese Patent Laid-Open No. Hei 5-142996. This is based on the position information obtained from the beacon information and the direction information of the own vehicle, and when the beacon information from the radio beacon on the highway is received on a general road, the beacon information is not adopted and displayed. Is not to be performed.

  Another conventional navigation system is disclosed in Japanese Patent Laid-Open No. 9-16888. This is to limit the receiving media according to the type of road that is running. During driving on a general road, only the beacon information from the optical beacon is received and the beacon information from the radio beacon is not received. On the contrary, only the beacon information from the radio beacon is received and the beacon information from the optical beacon is not received.

Since the conventional navigation system is configured as described above, the following road configuration may malfunction, and there is a problem that beacon information cannot be accurately processed according to the purpose.
When highways and ordinary roads are running side by side, for example, in parallel running sections such as the Metropolitan Expressway Shibuya Line and National Highway 246, and the Hanshin Expressway Kobe Line and National Highway 43, there is a difference in the position and direction used as a criterion. Therefore, there is a possibility of malfunction in the system described in JP-A-5-142996.

This case will be described using the road configuration shown in FIG. In FIG. 4, G1 is a general road up line, G2 is a general road down line, H11 is a highway up line, H12 is a highway down line, R13 and R14 are lamps, B20 is a radio beacon, and B21 is a radio wave. This is the beacon reception range.
In this way, it is assumed that the vehicle is traveling in a section in which a general road and an expressway are running side by side and receives beacon information from the radio wave beacon B20. The radio wave beacon B20 is installed for the up line H11 of the highway, and provides beacon information for vehicles traveling on the highway to vehicles entering the reception range B21 of the signal to be transmitted. However, even a vehicle traveling on a general road may receive the leaked radio wave of the radio beacon B20 if it passes through the reception range B21. In this case, the navigation system of the vehicle traveling on the up line G1 of the general road displays traffic jam information and destination information regarding the highway. In other words, wrong or unnecessary information is provided to the driver of the vehicle traveling on the up line G1 of the general road, and there is a problem that information provision by the navigation system is not properly performed. . In addition, when the radio wave beacon B20 is installed in the middle of a curved section as shown in FIG. 4, the direction of the own vehicle changes even for a vehicle traveling on a highway. There is a problem that there is a possibility that the received information may not be mistakenly adopted.

  In addition, when the system described in Japanese Patent Laid-Open No. 9-16888 is used, only beacon information from optical beacons is received during traveling on general roads, and conversely only beacon information from radio wave beacons is received during traveling on highways. Since reception is performed, for example, in a region where radio wave beacons are installed on both general roads and highways, there is a problem in that beacon information from radio wave beacons on general roads cannot be received.

  Furthermore, in both of the above-described conventional systems, the acceptance / non-acquisition determining means for beacon information is uniformly determined, and information that is low in dependence on the road on which the vehicle is traveling but important in common, such as emergency message information There is a problem that inconveniences such as no longer adopting such information.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to obtain a navigation system in which beacon information is appropriately adopted or not adopted for any configuration of roads.

The navigation system according to the present invention is mounted on a vehicle, detects its own vehicle position, displays it on a map on a monitor, receives beacon information from a radio beacon or an optical beacon arranged on the roadside, etc., and is unnecessary for the own vehicle in a navigation system adapted to unemployed for a beacon information, and road type of the beacon position included in beacon information, and the comparison determination and the road type of the vehicle position to determine when the map data matching, both The beacon information is adopted when the road types match, and the beacon information is not adopted when both road types do not match.

  In the navigation system according to the present invention, when the type of information included in the beacon information is identified and the type designated in advance is detected, only the information of the type designated in advance is adopted even if the comparison determination is inconsistent. To do.

  According to the present invention, the road type of the beacon position included in the beacon information is compared with the road type of the vehicle position determined at the time of matching from the map data, and if both road types match, the beacon information The beacon information is not adopted when the two road types do not match, so beacon information is received from a beacon installed on a different road from the road on which the vehicle is traveling. It is possible to prevent unnecessary information from being provided to the driver and to provide appropriate beacon information.

  According to this invention, when the type of information included in the beacon information is identified and a pre-designated type is detected, only the information of the pre-designated type is adopted even if the comparison determination does not match. Therefore, it is possible to adopt important information regardless of the road in the beacon information, and to provide the driver with important information quickly.

Embodiments of the present invention will be described below.
Embodiment 1 FIG.
1 is a functional block diagram showing the main functions of a navigation system according to Embodiment 1 of the present invention. In FIG. 1, 100 is a beacon receiving means for receiving beacon information transmitted from a radio wave beacon or an optical beacon installed at a predetermined position on the road, 130 is a map / route display, and the vehicle position is accurately displayed on the road. This is map data in which data used for map matching processing to be displayed, route calculation, route guidance, display of received beacon information, and the like are stored. Reference numeral 200 denotes position detection means for estimating the vehicle position based on outputs from various sensors and map data 130. A comparison unit 300 compares the beacon position information indicating the road type of the beacon position from the beacon receiving unit 100 with the own vehicle position information indicating the road type of the own vehicle position from the position detection unit 200. Judgment is performed. Here, the types of road include an intercity road, an intracity highway, and a general road. A acceptance / rejection determination unit 310 controls the adoption / non-adoption of beacon information based on “match” or “mismatch” determination information from the comparison unit 300. Reference numeral 500 denotes display means, and 400 denotes information processing means for processing information based on the beacon information from the acceptance / rejection determination means 310 and the map data 130 to display on the display means 500.

Next, the operation will be described.
When traveling on a road and entering the reception range of radio beacons and optical beacons installed on the road side, beacon information transmitted from the beacons is received by the beacon receiving means 100 and given to the comparing means 300. On the other hand, the vehicle position is sequentially estimated from the map information read from the map data 130 by the position detection means 200 and the outputs of various sensors, and the vehicle position information including the road type of the vehicle position is extracted and given to the comparison means 300. It is done.

FIG. 3 is a flowchart showing an operation procedure of the comparison unit 300.
When beacon information is received by the beacon receiving means 100 (step ST1), the road type X of the beacon position is determined from the beacon information (step ST2). Further, the road type Y of the vehicle position is determined based on the vehicle position information from the position detection means 200 (step ST3). Next, both road types X and Y are compared (step ST4), and if they match, a “match” output is given to the acceptance / rejection determination means 310 (step ST5). If they do not match, a “mismatch” output is given to the acceptance / rejection determination means 310 (step ST6).

  Next, if the determination information from the comparison means 300 is “match”, the acceptance / rejection determination means 310 sends the beacon information from the beacon receiving means 100 to the information processing means 400, and conversely if the determination information is “mismatch”. It operates so as not to send the beacon information to the information processing means 400. When the determination information is “match”, the information processing unit 400 processes the information based on the beacon information and the map data 130 to be displayed on the display unit 500.

FIG. 2 is a block diagram showing a configuration of a navigation system provided with a beacon receiver, which is a specific implementation of the functional configuration of FIG.
A beacon receiver 1 corresponds to the beacon receiving means 100 in FIG. Reference numeral 10 denotes a CD-ROM or DVD-ROM. Reference numeral 11 denotes a CD / DVD drive for reading information stored in these ROM media. These correspond to the map data 130 shown in FIG. A main CPU 30 performs functional processing of the position detecting means 200, the comparing means 300, and the acceptance / rejection determining means 310 in FIG. 1, and also performs processing of the information processing means 400 by the drawing IC 31. 21 is a vehicle speed pulse generator, 22 is a gyro, 23 is a GPS receiver, and these output sensor data when the main CPU 30 performs position detection. Reference numeral 50 denotes a monitor, which corresponds to the display means 500 in FIG.
Since the general operation of the navigation system is well known, the description thereof is omitted.

  As described above, according to the first embodiment, since the road type of the beacon position included in the beacon information is compared with the road type of the own vehicle position, the road configuration as shown in FIG. Even under such circumstances, the adoption / non-adoption of beacon information is accurately determined, and as a result, the effect of displaying appropriate information can be obtained.

Embodiment 2. FIG.
In the first embodiment, the system for comparison and determination based on the road type is shown, but it is also conceivable to use a route name instead. In this case, it is effective not only for the road configuration shown in FIG. 4 but also for the road configuration shown in FIGS. 5 (a) and 5 (b).
In FIG. 5A, a, b, and c are points on the route, and route A branches to route B and route C at branch point b. For simplification, only the lane in the direction of a → b is shown, and the reverse lane is omitted. When the beacon B1 is installed on the side of the route C near the branch point b, a vehicle traveling on the route B may enter the reception range B2 and receive a leaked radio wave. In this case, since the route B and the route C are the same road types, the functional configuration of the first embodiment may cause the beacon information to be displayed incorrectly. Further, when the beacon B1 is installed on the side of the route B near the branch point b as shown in FIG. 5B, the same problem occurs when the route C travels.

  Therefore, a comparison determination is made by the route name instead of the road type. That is, in the functional configuration of FIG. 1, the route name of the beacon position included in the beacon information received by the beacon receiving unit 100 and the route of the vehicle position recognized by the position detecting unit 200 on the data obtained from the map data 130. The name is compared with the comparison means 300, and a setting is made so as to determine whether the two match or not. By doing so, it is possible to obtain an effect of displaying appropriate information even when a beacon is installed at a place where the same type of road shown in FIG. 5 branches. In addition, a similar effect can be obtained by defining in advance a unique number, symbol, etc. for each route that can be used to specify a route instead of the official route name, and using that for comparison.

Embodiment 3 FIG.
Instead of road type and route name, place name information of beacon position included in beacon information, that is, address and place name information of own vehicle position recognized by the navigation system may be compared and determined. The same effects as those of the first and second embodiments can be obtained. Note that the place name information in this case includes an identification symbol in which codes and numbers are set in advance at appropriate intervals along the route corresponding to the address.

Embodiment 4 FIG.
Moreover, you may make it compare-determine the link number (VICS link etc.) number of the beacon position contained in beacon information, and the link number of the own vehicle position which the navigation system recognizes.
The road shown in FIG. 5 (a) is represented in the navigation system by a network composed of nodes N1 to N6 and links L1 to L5 shown in FIG. In this case, since the number of the link L3 of the beacon position is provided as the beacon information from the beacon B1, if there is a vehicle on the link L3, the beacon information from the beacon B1 is adopted, and the link of the vehicle position is also provided. If the value is other than L3, it can be rejected, and the effect of displaying appropriate beacon information can be obtained.
Here, in consideration of the possibility that the timing of the beacon reception process on the vehicle side may be before or after the actual beacon position, even if the vehicle position on the links L1, L4, L5 through which the vehicle traveling on the link L3 can pass is In order to be able to adopt the beacon information from the beacon B1, it is practical to search for the previous and next links within a predetermined range from the link L3 of the beacon position and adopt the vehicle position if any of them is present. It is considered to be the target.

Embodiment 5. FIG.
In the first to fourth embodiments, the functional configuration has been described in which beacon information is collectively rejected when the beacon position and the vehicle position do not coincide with each other. However, for all vehicles traveling around the beacon, even beacon information for other roads can be shared and useful information. For example, emergency message information is necessary information because it is assumed that information is provided when an earthquake warning declaration is being issued. When this type of information is provided by a beacon, it is inconvenient if it is not received and displayed by a vehicle traveling on a road different from the beacon position. Therefore, when predetermined information such as emergency information is included in the beacon information, the navigation system is previously provided with a processing function that does not discard the predetermined information regardless of the comparison determination result between the beacon position and the vehicle position.

For example, a function for identifying the type of the content of the received beacon information is provided in the beacon receiving means 100 in FIG. 1 or in the subsequent stage so that the type of necessary information can be identified. When the comparison determination result of the comparison unit 300 is “non-adopted” and the identification signal for the type of the predetermined information is detected, the acceptance / rejection determination unit 310 performs a process of adopting only the predetermined information.
By doing so, it is possible to clearly distribute beacon information necessary / unnecessary for the host vehicle and to display an appropriate information.

It is a functional block diagram which shows the main functions of the navigation system which concerns on Embodiment 1 of this invention. It is a block diagram which shows the structure of the navigation system which concerns on Embodiment 1 of this invention. It is a flowchart which shows the operation | movement procedure of the comparison means of the navigation system which concerns on Embodiment 1 of this invention. It is explanatory drawing which shows one example of a road structure. It is explanatory drawing which shows the other example of a road structure, (a) And (b) is a figure which shows the example of the installation position of a beacon. It is explanatory drawing which expressed the road composition with the network.

Explanation of symbols

  1 beacon receiver, 10 CD-ROM or DVD-ROM, 11 CD / DVD drive, 21 vehicle speed pulse generator, 22 gyro, 23 GPS receiver, 30 main CPU, 31 drawing IC, 50 monitor, 100 beacon receiving means, 130 map data, 200 position detection means, 300 comparison means, 310 acceptance / rejection determination means, 400 information processing means, 500 display means, B20 radio wave beacon, B21 reception range, G1 general road up line, G2 general road down line, H11 Expressway up line, H12 expressway down line, L1-L5 links, N1-N6 nodes, R13, R14 ramps, points on a, b, c routes.

Claims (2)

Detects the position of the vehicle mounted on the vehicle, displays it on a map on the monitor, receives beacon information from radio wave beacons or optical beacons placed on the roadside, etc., and does not adopt the beacon information unnecessary for the vehicle In the navigation system configured as described above, the road type of the beacon position included in the beacon information is compared with the road type of the vehicle position determined at the time of matching from map data, and both road types match. The beacon information is adopted in some cases, and the beacon information is not adopted if the two road types do not match. The type of information included in the beacon information is identified, and when a predesignated type is detected, only the information of the predesignated type is adopted even if the comparison determination does not match. The navigation system according to 1.

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