JP2012177712A - Navigation system, program, and navigation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a navigation device which can properly locate an available parking area and perform guidance when a vehicle approaches a destination.SOLUTION: When an own vehicle approaches a destination set based on map data stored in a map data storage unit 30 (S102:YES), an in-vehicle navigation device receives vehicle information including position information and set destination information from another vehicle locating in a predetermined range from the own vehicle (S107). Then, based on the received vehicle information and the map data, the device locates an available parking area to create parking area data (S108), and perform guidance of the available parking area based on the parking area data (S110). Thus, when the own vehicle approaches the destination, the device locates an available parking area based on the vehicle information transmitted from the other vehicle, so that it is possible to properly locate an available parking area and perform guidance to improve convenience.

Description

  The present invention relates to a navigation system, a program, and a navigation device.

  2. Description of the Related Art Conventionally, an in-vehicle navigation device capable of setting a point desired by a user as a destination, searching for a route, and performing route guidance is known. In recent years, a vehicle-mounted navigation device has been proposed that can collect the location and time at which a vehicle is parked and create parking information associated with a preset destination (see, for example, Patent Document 1).

JP 2007-255920 A

However, the in-vehicle navigation device according to Patent Document 1 stores a parking lot related to the destination and guides the parking lot related to the destination stored at the time of setting the destination. When actually parking, there is a possibility that it is not an appropriate parking lot.
The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a navigation system, a program, and a navigation device capable of specifying an available parking area and guiding an appropriate parking area. There is to do.

  The navigation system according to claim 1 is a map data storage means for storing map data, a destination setting means for setting a destination based on the map data, and a setting purpose which is a destination set by the destination setting means. The location information and destination information of the other vehicle transmitted from the other vehicle are obtained from the guidance means for guiding the location, and when the destination of the other vehicle and the set destination are the same, the information is obtained from the other vehicle. And a parking area specifying means for specifying a usable parking area based on the position information and the map data.

  According to such a configuration, it is possible to specify an available parking area from position information and destination information transmitted from another vehicle and map data, and to guide an appropriate parking area. improves. For example, an open parking lot can be specified as an “available parking area” and guided.

  The parking area specifying means of the navigation system according to claim 2 specifies the facility where the other vehicle is parked based on the location information of the other vehicle and the facility information of the map data, and uses the facility as a parking area that can be used. Identify.

By the way, for example, when an event or the like is being performed at a destination, a parking lot at a nearby facility, a riverbed, a school yard or the like may be a temporary parking lot at the destination. Therefore, the following configuration may be employed.
The parking area specifying means of the navigation system according to claim 3 sets the same destination as the set destination in an area other than the parking lot stored in the map data based on the position information of the other vehicle. When a predetermined number or more of other vehicles are parked, the area is specified as a usable parking area. According to this configuration, for example, even when a facility that is not normally used as a parking lot is a temporary parking lot corresponding to the destination, the facility is “available parking area”. Can be specified, so that an appropriate parking area can be guided.

The guidance means of the navigation system according to claim 4 sets the parking area specified by the parking area specifying means together with the available parking area associated with the set destination in the map data stored in the map data storage means. It will guide you as an available parking area corresponding to your destination.
The navigation means of the navigation system according to claim 5, wherein the map data stored in the map data storage means is an available parking area associated with the set destination and the degree of congestion of the parking area specified by the parking area specifying means. Based on the available parking area associated with the set destination in the map data or the parking area specified by the parking area specifying means. For example, the number of vehicles existing in a certain parking area can be known from the position information of other vehicles. By dividing this by the area of the parking area, the vehicle density can be calculated, and the degree of congestion of the parking area can be determined based on the vehicle density. And an appropriate parking area can be guided based on the congestion degree of a parking area.
The parking area specifying means of the navigation system according to claim 6 acquires the surrounding information of the other vehicle transmitted from the other vehicle, and based on the surrounding information, the degree of congestion of the parking area where the other vehicle is parked Judging.

The above has been described as the invention of the navigation system, but can also be realized as an invention of the following program.
That is, based on map data stored in the map data storage means, destination setting means for setting a destination, guidance means for guiding a set destination which is a destination set by the destination setting means, and other vehicles If the destination information and destination information of the other vehicle transmitted from is acquired and the destination and the set destination of the other vehicle are the same, based on the location information and map data acquired from the other vehicle, It is a program for causing a computer to function as a parking area specifying means for specifying a usable parking area. By executing such a program, the same effects as described above can be obtained.
Moreover, it can also be realized as an invention of a navigation apparatus as shown below.
That is, the navigation device includes a map data storage means for storing map data, a destination setting means for setting a destination based on the map data stored in the map data storage means, and a destination set by the destination setting means. When the guidance means for guiding the set destination that is the location and the position information and destination information of the other vehicle transmitted from the other vehicle are acquired, and the destination and the set destination of the other vehicle are the same, Parking area specifying means for specifying an available parking area based on position information and map data acquired from another vehicle.

It is a block diagram which shows the structure of the vehicle-mounted navigation apparatus of one Embodiment of this invention. It is a flowchart which shows the parking lot guidance process by the vehicle-mounted navigation apparatus of one Embodiment of this invention. 4 is a flowchart showing vehicle information transmission from another vehicle according to an embodiment of the present invention. It is explanatory drawing explaining the parking area identification method by the vehicle-mounted navigation apparatus of one Embodiment of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(One embodiment)
FIG. 1 is a block diagram showing the overall configuration of the in-vehicle navigation device 1 according to the present embodiment. The vehicle-mounted navigation device 1 mounted on the vehicle 2 is configured with a control unit 10 as a center, and a position detector 20, a map data storage unit 30, an operation switch group 40, and a communication unit 50 connected to the control unit 10. , A drawing unit 60, an audio output unit 70, and an information storage unit 80. The vehicle 2 on which the in-vehicle navigation device 1 is mounted corresponds to the “own vehicle”.

The control unit 10 is configured as a normal computer, and includes a CPU, a ROM, an I / O, and a bus line for connecting these configurations.
The position detector 20 includes a well-known geomagnetic sensor 21, a gyroscope 22, a distance sensor 23, a GPS (Global Positioning System) receiver 24 that receives radio waves from a satellite, and the like. Since these sensors 21 to 24 have errors of different properties, they are used while complementing each other.

  The map data storage unit 30 is a storage device realized as, for example, a hard disk device (HDD). Although the HDD is used in the present embodiment, other media such as a DVD-ROM and a memory card may be used. The map data storage unit 30 stores so-called map matching data for improving the accuracy of position detection and map data for searching for a route. The map data includes various data, one of which is facility information about the facility. The facility information is specifically POI (Point Of Interest) information stored in association with an ID that identifies the facility. The POI information includes a facility ID, an address, a type (genre), data indicating an area (peripheral coordinates, center coordinates, and area), and the like.

The operation switch group 40 includes a touch switch integrated with the display 61, a mechanical switch, a remote control device, or the like, and is used for various inputs.
The communication unit 50 is a configuration for performing wireless communication with the vehicle-mounted device 91 mounted on the vehicle 90. At this time, it is this communication unit 50 that enables vehicle-to-vehicle communication between the vehicle 2 and the vehicle 90. It is assumed that the communicable range of the communication unit 50 in this embodiment is 2000 m. Although one vehicle 90 is shown in FIG. 1, the vehicle-mounted navigation device 1 actually communicates with a plurality of vehicle-mounted devices 91 mounted on the plurality of vehicles 90. In the present embodiment, the vehicle-mounted navigation device 1 can not only receive information from the vehicle-mounted device 91 but also transmit information to the vehicle-mounted device 91. Information received by the communication unit 50 is accumulated in the information storage unit 80.

A display 61 is connected to the drawing unit 60. The display 61 is a color display using liquid crystal or CRT. Information is displayed via the display 61.
A speaker 71 is connected to the audio output unit 70, and voice guidance is performed through the speaker 71.

The information storage unit 80 is for storing information received by the communication unit 50, and includes an HDD similar to the map data storage unit 30. Of course, other media such as a memory card may be used. Moreover, the same HDD as the map data storage unit 30 may be used.
The vehicle-mounted device 91 mounted on the vehicle 90 is capable of bidirectional communication with the communication unit 50. In the present embodiment, it is assumed that the configuration is the same as that of the in-vehicle navigation device 1, and the description is omitted.

  By the way, in this embodiment, when the vehicle 2 approaches the destination vicinity, it has the characteristics in the point which guides appropriately the parking area which can be utilized. The parking lot guidance process will be described based on the flowcharts shown in FIGS. FIG. 2 is a flowchart showing processing in the in-vehicle navigation device 1, and FIG. 3 is a flowchart showing processing in the in-vehicle device 91.

The process shown in FIG. 2 is a process that is performed at predetermined intervals, for example, every 100 msec when the ignition key is on.
In the first step S101 (hereinafter, “step” is omitted and simply indicated by the symbol “S”), it is determined whether or not the destination is set. For setting the destination, for example, when a condition is input via the operation switch group 40, a list of destinations that meet the condition is displayed on the display 61. By performing a selection operation from this list, a destination is set, a route to the destination is searched, and guidance is started based on the searched route. The “destination” means a facility or position coordinates on the map data set as described above. Moreover, in this embodiment, facility ID, an address, and center coordinates are memorize | stored in RAM which the control part 10 does not have as information regarding a destination with the setting of the destination.

When it is determined that the destination is not set (S101: NO), the processing after S102 is not performed. When it is determined that the destination is set (S101: YES), the process proceeds to S102.
In S102, it is determined whether or not the vehicle 2 has approached the destination. In the present embodiment, when the vehicle 2 is located within a first predetermined range centering on the destination (in this embodiment, within a circle with a radius of 1 km), it is determined that “the host vehicle has approached the destination”. . The determination that the vehicle has approached the destination may be made based on whether or not the remaining distance to the destination is, for example, 1 km or less, rather than whether or not the vehicle 2 is located within a circle with a radius of 1 km. . When the vehicle 2 is not approaching the destination (S102: NO), the processes after S103 are not performed. When the vehicle 2 approaches the destination (S102: YES), the process proceeds to S103.

In S103, it is determined whether or not the transmission start flag is set. When the transmission start flag is set (S103: YES), the process proceeds to S106. When the transmission start flag is not set (S103: NO), the process proceeds to S104.
In S104, a transmission start flag is set. Then, when the transmission start flag is set, time measurement starts, and the process proceeds to S105. This transmission start flag is reset when the ignition key is turned on again after parking the vehicle.

In S <b> 105, a transmission request for vehicle information is transmitted from the communication unit 50 to the vehicle-mounted device 91 of the vehicle 90 that can communicate with the vehicle 2.
Here, the transmission method of the vehicle information transmission request in the present embodiment is vehicle-to-vehicle communication as described above. The information transmitted from the vehicle 2 at the time of the vehicle information transmission request includes the vehicle ID of the vehicle 2 and information for specifying the second predetermined range as the predetermined range centered on the destination (for example, the second predetermined range). Coordinate information shown, information on the center coordinates of the destination and information indicating that the radius is about 500 m centered on the center coordinates, etc.), and that the vehicle is in the second predetermined range and is parked. And information indicating that the target vehicle is to transmit the vehicle information by specifying the vehicle ID of the vehicle 2 as the transmission destination. Note that the “second predetermined range” in the present embodiment is a circle having a radius of 500 m centered on the destination. The “second predetermined range” is set as a range narrower than the “first predetermined range”.

  In the vehicle-mounted device 91 of the vehicle 90 capable of inter-vehicle communication with the vehicle 2, processing based on the flowchart shown in FIG. 3 is performed. The process shown in FIG. 3 is a process that is performed at predetermined intervals, for example, every 100 msec, regardless of whether the ignition key is on or off.

  In the first S201, it is determined whether or not the vehicle information transmission request transmitted from the vehicle 2 in S105 in FIG. 2 has been received. When it is determined that the vehicle information transmission request has not been received (S201: NO), the processing after S202 is not performed. When it is determined that the vehicle information transmission request has been received (S201: YES), the process proceeds to S202.

In S202, it is determined whether or not the vehicle 90 is located within the second predetermined range. As described above, the second predetermined range is specified by the information transmitted from the vehicle 2 when the vehicle information transmission request is made, and in this embodiment, the radius centered on the center coordinates of the destination set in the vehicle 2 The range is 500 m. When it is determined that it is not located within the second predetermined range (S202: NO), the processing after S203 is not performed. When it is determined that the position is within the second predetermined range (S202: YES), the process proceeds to S203.
In S203, it is determined whether or not the vehicle 90 is parked. In this embodiment, when the ignition key is turned off, it is determined that the vehicle is parked. When it is determined that the vehicle 90 is not parked (S203: NO), the process of S204 is not performed. When it is determined that the vehicle 90 is parked (S203: YES), the process proceeds to S204.
The determination processing in S202 and S203 is based on the vehicle information transmission request information transmitted from the vehicle 2 to determine whether or not the vehicle 90 is a target vehicle for the vehicle information transmission request. Here, the target vehicle of the vehicle information transmission request corresponds to “another vehicle”.

  In S204, vehicle information of the vehicle 90 is transmitted. In this embodiment, vehicle information shall be the information regarding the position coordinate as a position information where the vehicle 90 is parked, and the destination. The information regarding the destination is information transmitted when the destination is set in the vehicle-mounted device 91 before the vehicle is parked, and includes the facility ID, address, center coordinates, and the like of the destination. The vehicle information is transmitted together with the ID of the vehicle 2 for specifying the transmission destination.

  Returning to FIG. 2 again, in S106, where the transmission start flag is set (S103: NO), it is determined whether or not a predetermined time has elapsed since the transmission start flag was set (S104). In this embodiment, since the number of vehicles existing in the predetermined range is unknown, a timeout value is provided. Although the predetermined time in this embodiment is 10 seconds, it may be configured to be variable according to the communication state.

When it is determined that a predetermined time has elapsed since the transmission start flag was set (S106: YES), the process proceeds to S109. When it is determined that the predetermined time has not elapsed since the transmission start flag was set (S106: NO), the process proceeds to S107.
In S <b> 107, the communication unit 50 receives vehicle information transmitted from the vehicle 90 and stores the received information in the information storage unit 80. Then, the process proceeds to S108. The process in S107 is to receive the vehicle information of the vehicle 90 transmitted in S204 in FIG.

In S108, an available parking area is specified based on the received vehicle information, and parking lot data is created. In the present embodiment, vehicle information is received from all communicable vehicles 90 among the vehicles parked in the second predetermined range centering on the destination, and the vehicle information is stored in the information storage unit 80. . And the control part 10 acquires the vehicle information received from the vehicle in which the same destination was set among the vehicle information memorize | stored in the information storage part 80, specifies an available parking area, parking data Create
Specifically, the control unit 10 receives information from the vehicle 90 and includes information (facility ID, address, center coordinates, etc.) regarding the destination included in the vehicle information stored in the information storage unit 80 and the vehicle 2 (not shown). When information on the destination (facility ID, address, center coordinates, etc.) stored in the RAM is compared, and the information on the destination matches, it is “vehicle information of the vehicle with the same destination set”. The vehicle information is acquired.
Next, the position coordinate of the vehicle 90 included in the acquired vehicle information is compared with the “data indicating the area” of the facility information stored in the map data storage unit 30, and the facility where the vehicle 90 is parked is specified. To do. When a predetermined number or more (five or more in this embodiment) of vehicles are parked in one facility, the facility is specified as a usable parking area. Furthermore, the degree of congestion is calculated based on the number of vehicles located in the facility identified as usable as a parking area and the area of the facility.
Then, the parking lot data is created by combining the facility information specified as the available parking area and the degree of congestion.

  In S109, after a predetermined time has elapsed after the transmission start flag is set (S106: YES), it is determined whether or not parking lot data has been created in S108. If the parking lot data is created (S109: YES), the process proceeds to S110, the parking lot is guided based on the parking lot data created in S108, and the process is terminated.

In S111, the process proceeds to the case where the parking lot data is not created in S108 (S109: NO), the parking lot is guided based on the facility information stored in advance in the map data storage unit 30, and this process is terminated. .
As for the parking lot guidance method, in addition to displaying the parking lot location superimposed on the map displayed on the screen, the destination and the name of the parking lot close to the current location are guided by voice. You may do it.

  Here, the specification of the available parking area and the creation of the parking lot data will be described in detail based on FIG. It is assumed that the vehicle A is mounted with the in-vehicle navigation device 1 and is traveling with the facility X set as the destination (S101: YES). That is, the vehicle A is assumed to be “own vehicle”. The RAM (not shown) of the control unit 10 of the in-vehicle navigation device 1 mounted on the vehicle A stores the facility ID, address, center coordinates, and the like of the facility X that is the destination as information about the destination. ing.

  It is assumed that the vehicle B is parked in the parking lot Y of the facility X after traveling with the facility X set as the destination. The parking lot Y is a parking lot stored in the map data storage unit 30 in association with the facility X. It is assumed that the vehicles C to G are parked in the facility Z within the second predetermined range from the facility X after traveling with the facility X set as the destination. All the vehicles B to G are equipped with an in-vehicle device 91. That is, the vehicles B to G are “other vehicles”. The facility X is a park, the facility Z is a school, and the facility X and the facility Z are not associated in the map data storage unit 30.

  For example, when an event such as a festival is held at the facility X, the parking lot Y at the facility X may not be sufficient. Only when such an event is held, the facility Z that is a neighboring facility of the facility X may be available as a temporary parking lot. The facility Z will be described below assuming that it can be temporarily used as a temporary parking lot for the facility X.

  When the vehicle A approaches the facility X (S102 in FIG. 2: YES), a vehicle information transmission request is transmitted to the vehicles B to G on which the vehicle-mounted device 91 is mounted (S105 in FIG. 2). Specifically, the vehicle ID of the vehicle A, the center coordinates of the facility X, and information indicating that a circle with a radius of 500 m centering on the center coordinates of the facility X is set as the second predetermined range, exists in the second predetermined range. In addition, information indicating that the parked vehicle is the target, and the target vehicle transmits the position information and the set destination information (facility ID, address, center coordinates, etc.) to the vehicle A. The information which instruct | indicates is transmitted by vehicle-to-vehicle communication. The vehicles B to G that have received the vehicle information transmission request are within the second predetermined range and are parked, and thus are target vehicles. Therefore, the vehicles B to G combine the position information of each vehicle and the set destination information (that is, the facility ID, address, center coordinates, etc. of the facility X) by vehicle-to-vehicle communication. (S203 in FIG. 3).

The vehicle A receives the position information of each vehicle transmitted from the vehicles B to G and the set destination information (S107 in FIG. 2). The received data is stored in the information storage unit 80. And the information (facility ID, address, center coordinates, etc.) about the destination transmitted from the vehicles B to G, and the information (facility ID, address, center coordinates, etc.) stored in the RAM of the vehicle A, , It is assumed that the information about the destination matches. If so, the vehicles B to G are “vehicles having the same destination set”, and parking data is created based on the vehicle information of the vehicles B to G (S108 in FIG. 2).
Since the vehicle B is parked in the parking lot Y that is the parking lot of the facility X, the parking lot Y is specified as “available parking area”.

  Further, when the positional information of the vehicles C to G and the facility information stored in the map data storage unit 30 are compared, the vehicles C to G are parked in the area of the facility Z. And since the predetermined number or more (in this embodiment, 5 or more) of vehicles having the same destination X are parked in the facility Z, “the facility Z is an available parking area. Can be specified. The facility Z is a school and is not normally used as a parking lot. However, in the present embodiment, since a predetermined number or more of the vehicles that have set the same destination are parked, the in-vehicle navigation device 1 is based on the position information and destination information received from the vehicles C to G. , “Currently, the facility Z is a parking area that can be used as a temporary parking lot for the facility X”.

That is, in the present embodiment, the facility Z is stored not only as a parking lot in the map data storage unit 30 but also as a parking lot of a destination originally such as a parking lot in a neighboring facility, a riverbed, a school yard, etc. Even if it is a facility that has not been made, the vehicle navigation device 1 uses the facility Z that is “an area where a predetermined number of vehicles or more having the same destination are parked” as “use corresponding to the facility X” It is possible to specify that it is a temporary parking lot.
In this way, in this embodiment, the parking lot Y and the facility Z are identified as “available parking areas corresponding to the facility X”, and parking lot data is created (S108).

  Here, the determination method of the congestion degree of a parking area is demonstrated. It is assumed that 100 vehicles are parked in the parking lot Y, and 20 vehicles are parked in the facility Z. Note that the number of vehicles parked in the parking lot Y and the facility Z can be counted based on the vehicle position information received in S105 in FIG. In addition, the parking areas of the parking lot Y and the facility Z are the same. If so, the facility Z has a smaller vehicle density obtained by dividing the number of vehicles by the parking area. Therefore, it can be determined that the facility Z is “vacant” than the parking lot Y. In the present embodiment, it is assumed that the facility Z is guided as “a parking area that currently corresponds to the facility X and can be used”. The guidance may be configured to guide by voice, or may be superimposed on the display 61. The parking area may be the area of the facility area stored in the map data storage unit 30, or may be the area obtained by subtracting the building area from the area of the facility area.

  As described above in detail, according to the vehicle-mounted navigation device 1 of the present embodiment, when the vehicle 2 approaches the destination set based on the map data stored in the map data storage unit 30 (S102: YES), vehicle information including position information and set destination information is received from the vehicle 90 parked within the second predetermined range (S107). Then, based on the received vehicle information and map data, an available parking area is identified and parking data is created (S108), and the available parking area is guided based on the parking data (S110). ).

  That is, in this embodiment, when the vehicle 2 approaches the destination, the available parking area is determined based on the vehicle information transmitted from the vehicle 90 parked in the second predetermined range from the destination. Can be identified. Thereby, since the parking area which can be utilized can be specified and an appropriate parking area can be guided, the convenience improves.

  Moreover, since the parking area which can be used is specified based on the vehicle information transmitted from the vehicle 90 in which the same destination as the vehicle 2 is set, the parking area corresponding to the destination is specified, and an appropriate You can guide the parking area. In particular, when a predetermined number or more of vehicles 90 having the same destination as the vehicle 2 are parked in an area other than the parking lot stored in the map data storage unit 30, a parking area in which the area can be used Can be specified as By comprising in this way, when the facility which is not memorize | stored as a parking lot in the map data storage part 30, ie, the facility which is not normally used as a parking lot, is a temporary parking lot corresponding to the said destination In this case, the facility can be identified as “a parking area that can be used when the host vehicle approaches the destination”, and an appropriate parking lot can be guided.

  Furthermore, in this embodiment, a more appropriate parking area can be guided by specifying a parking area based on the degree of congestion of the parking area determined based on the vehicle information of the vehicle 90.

  The map data storage unit 30 of the present embodiment constitutes “map data storage means”. Further, the control unit 10 constitutes “destination setting means”, “parking area specifying means”, and “guidance means”. 2, S102, S103, S104, S106, and S108 correspond to processing as a function of “parking area specifying means”, and S110 in FIG. 2 corresponds to processing as a function of “guidance means”. .

  As mentioned above, this invention is not limited to the said embodiment at all, In the range which does not deviate from the meaning of invention, it can implement with a various form.

(A) Acquisition of vehicle information In the above embodiment, data transmitted from all vehicles communicable with the host vehicle parked in a predetermined range is received and received from a vehicle having the same destination set. Although the parking area is specified based on the vehicle information, the parking area may be specified using all received data. Moreover, you may make it receive vehicle information only from the vehicle to which the same destination was set.

  In the above embodiment, when the ignition key is turned off in S203 in FIG. 3, it is determined that a vehicle within the second predetermined range is parked, and vehicle information is acquired only from the parked vehicle. Was. The determination in S203 in FIG. 3 does not depend on whether the ignition key is on or off. For example, a vehicle that is located outside the road and is traveling at a predetermined speed or less searches for a space that can be parked in the parking area. Therefore, the vehicle information may be obtained from such a vehicle. In other words, “acquire vehicle information including the position information of the vehicle from a vehicle in which the ignition is off within a predetermined range centered on the destination or a vehicle that is located outside the road and is traveling at a predetermined speed or less. Is to do.

(A) Creation of parking lot data In the above embodiment, the vehicle 90 is parked by comparing the acquired position coordinates of the vehicle 90 with the “data indicating the area” of the facility information stored in the map data storage unit 30. The facility in which a predetermined number or more vehicles are located in one facility is identified as a usable parking area. When the position coordinates of the vehicle are not located in any facility stored in the map data storage unit 30, for example, the second predetermined range is divided into 100m square areas, and a predetermined number or more vehicles are divided into one area. May be specified as an “available parking area”. Further, for example, the area may be specified based on an address such as address 6.

(C) Determination of degree of congestion In the above embodiment, the vehicle density obtained by dividing the number of vehicles parked in the parking area by the parking area is calculated and compared to guide the parking area having a low vehicle density. In addition, a predetermined vehicle density is set in advance, and when the vehicle density is lower than the predetermined vehicle density, it is “vacant”, and when the vehicle density is higher than the predetermined vehicle density, it is “congested”. May be. In other words, “if the vehicle density in the parking area calculated based on the vehicle information and map data of other vehicles is greater than a predetermined value, it is determined that the parking area is congested”. In addition, guidance may be given that the degree of congestion in each parking area is “congested” or “empty”. Note that the vehicle density may be calculated by dividing the number of vehicles by the number of vehicles that can be parked instead of dividing the number of vehicles by the parking area.

  Moreover, in S107 of the said embodiment, vehicle information is acquired from the other vehicle parked in the predetermined range. In the above embodiment, the vehicle information includes vehicle position information and destination information set by the vehicle-mounted device. You may comprise so that the periphery information of a vehicle may be acquired as "information regarding a congestion degree." As the peripheral information, for example, when the vehicle has a camera capable of photographing the periphery of the vehicle, it is video information around the vehicle photographed using the camera. By acquiring this video information, the degree of congestion in the parking area where the vehicle is parked can be determined. In other words, “the vehicle information includes the surrounding information of the other vehicle, and the degree of congestion of the parking area where the other vehicle is parked is determined based on the surrounding information”. The degree of congestion may be determined by another vehicle and transmitted to the own vehicle.

  Further, for example, the in-area travel time from when the vehicle enters the parking area until it is parked may be acquired as “information related to the degree of congestion”. When the traveling time in the area is long, it can be determined that the parking area is congested. In other words, “the vehicle information includes the in-area travel time from when another vehicle enters the parking area until it is parked, and the parking area is congested when the in-area travel time is longer than the predetermined time. It is determined that.

  1: vehicle-mounted navigation device, 2: vehicle (own vehicle), 10: control unit (destination setting means, parking area specifying means, guide means), 20: position detector, 21: geomagnetic sensor, 22: gyroscope, 23: Distance sensor, 24: GPS receiver, 30: Map data storage unit (map data storage means), 40: Operation switch group, 50: Communication unit, 60: Drawing unit, 61: Display, 70: Audio output unit, 71: Speaker, 80: Information storage unit, 90: Vehicle, 91: On-vehicle device

Claims (8)

Map data storage means for storing map data;
Destination setting means for setting a destination based on the map data stored in the map data storage means;
Guidance means for guiding a set destination which is a destination set by the destination setting means;
When the position information and the destination information of the other vehicle transmitted from the other vehicle are acquired, and the destination of the other vehicle and the set destination are the same, the position information acquired from the other vehicle and the map data And a parking area specifying means for specifying an available parking area,
A navigation system comprising:   The parking area specifying means specifies a facility where the other vehicle is parked based on position information of the other vehicle and facility information of the map data, and specifies the facility as a usable parking area. The navigation system according to claim 1.   The parking area specifying means is configured so that, based on the position information of the other vehicle, the other vehicle in which the same destination as the set destination is set in an area other than the parking lot stored in the map data is predetermined. The navigation system according to claim 1 or 2, wherein the parking area is specified as an available parking area when a plurality of parking spaces are parked.   The guide means includes the parking area specified by the parking area specifying means together with the available parking area associated with the set destination in the map data stored in the map data storage means. The navigation system according to any one of claims 1 to 3, wherein guidance is provided as an available parking area corresponding to.   The guide means is based on the available parking area associated with the set destination in the map data stored in the map data storage means and the degree of congestion of the parking area specified by the parking area specifying means. In the map data, an available parking area associated with the set destination or the parking area specified by the parking area specifying means is guided. The described navigation system.   The parking area specifying means acquires peripheral information of the other vehicle transmitted from the other vehicle, and determines a congestion degree of the parking area where the other vehicle is parked based on the peripheral information. The navigation system according to claim 5, wherein Destination setting means for setting a destination based on the map data stored in the map data storage means;
Guidance means for guiding a set destination which is a destination set by the destination setting means;
And the position information and destination information of the other vehicle transmitted from the other vehicle are acquired, and when the destination of the other vehicle and the set destination are the same, the position information acquired from the other vehicle and the Parking area identification means for identifying an available parking area based on the map data,
As a program that allows the computer to function. Map data storage means for storing map data;
Destination setting means for setting a destination based on the map data stored in the map data storage means;
Guidance means for guiding a set destination which is a destination set by the destination setting means;
When the position information and the destination information of the other vehicle transmitted from the other vehicle are acquired, and the destination of the other vehicle and the set destination are the same, the position information acquired from the other vehicle and the map data And a parking area specifying means for specifying an available parking area,
A navigation device comprising:

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