JP5692628B2 - Navigation device and navigation program - Google Patents

Description

  The present invention relates to a navigation device and a navigation program, and for example, relates to a search for a travel route that guides a parking lot existing around a destination.

2. Description of the Related Art Navigation devices that acquire and guide a travel route to an input destination by searching or communicating are widely used. In this navigation device, in addition to guiding a parking lot by setting a parking lot as a destination, a navigation device that searches for an optimal parking lot around the destination, acquires a travel route to the parking lot, and guides it. Has also been proposed.
For example, Patent Document 1 describes a technique for searching and guiding a travel route to a parking lot closest to the destination, and guiding another nearby parking lot when the guided parking lot is full. .
Patent Document 2 describes that it is determined in advance whether or not the parking lot set as the destination is full, and if it is full, announcing the full vehicle and then searching for and guiding the route to the nearby empty parking lot is described. Has been.

On the other hand, when there are a plurality of parking lots around the destination G, a method of acquiring a probability of parking for each parking lot and searching for and guiding a travel route through the parking lot with the highest parking probability is also conceivable. .
For example, as shown in FIG. 5 (a), when the parking probability of each parking lot is p1, p2, p3, p4, p5 in the descending order, the travel route through the parking lot p1 having the highest parking probability is searched. I will guide you.

However, if the designated parking lot is full, it must be confirmed after arrival and then moved to another parking lot.
For this reason, as shown in FIG. 5 (b), the same road round trip and patrol are repeated many times in order to park near the destination until it arrives at a vacant parking lot when it actually arrives. There is a possibility.
Such a problem occurs not only when the parking lot is guided based on the parking probability, but also when the methods of Patent Documents 1 and 2 are used.

JP-A-1-173822 JP 2004-177199 A

  An object of the present invention is to enable more reliable parking without traveling as much as possible on a road.

(1) In invention of Claim 1, the destination acquisition means which acquires the destination, the parking lot search means which searches the parking lot which exists in the predetermined area including the acquired destination, and the searched parking A parking probability acquisition means for acquiring a parking probability that can be parked for each parking lot; a parking lot extraction means for extracting a combination of parking lots such that the overall parking probability P of the combination of the parking lots is equal to or greater than a predetermined threshold Pt; For each combination of the extracted parking lots, a distance cost calculating means for calculating a total distance cost for a route passing through the parking lot, and a predetermined number of traveling routes with a low total distance cost for each calculated route are presented to the user. and a travel route determination means for determining a selected travel route of the user to the final travel path, in accordance with the travel path determined by the travel path determination unit, parking via said travel path To provide a navigation apparatus characterized by comprising a guiding means for guiding the play, the.
(2) In the invention according to claim 2, the parking lot extraction means calculates the probability P2 of parking in any parking lot when passing through all the parking lots to be combined as the overall parking probability P. The navigation device according to claim 1 is provided.
(3) In the invention described in claim 3, the distance cost calculating means calculates the total distance cost by changing the distance cost of the road according to the positional relationship with the destination. A navigation device according to claim 2 is provided.
(4) In the invention described in claim 4, the navigation device according to claim 2, wherein the parking lot extraction means sets a parking lot having a parking probability of a predetermined value or more as a target of the combination. I will provide a.
(5) In the invention according to claim 5, when the last parking lot guided by the guiding means cannot be parked, the travel route determining means excludes each guided parking lot from the route target and travels again. The navigation device according to claim 1, wherein a route is determined.
(6) In the invention described in claim 6, the computer includes a destination acquisition unit that acquires a destination, a parking lot search unit that searches for a parking lot existing in a predetermined area including the acquired destination, A parking lot that extracts a parking probability combination that acquires a parking probability that can be parked for each of the searched parking lots, and a parking lot that has a total parking probability P of the combination of the parking lots equal to or greater than a predetermined threshold Pt. Extraction means, distance cost calculation means for calculating a total distance cost for a route passing through a parking lot for each combination of the extracted parking lots, and a predetermined upper number of travel routes with a low total distance cost for each calculated route was presented to a user, the travel route determination means for determining a selected travel route of the user to the final travel path, in accordance with the travel path determined by the travel path determination unit, wherein the run To provide a navigation program to function as a guide means for guiding the parking lot to go through the route.

In the present invention, a parking probability that can be parked for each parking lot that exists in a predetermined area including the destination is acquired, and a combination of parking lots that has a total parking probability that is equal to or higher than a predetermined value is extracted. It is possible to park more reliably.
In addition, for example, when each parking lot in the extracted combination is displayed on the screen, the user passes through each parking lot while referring to this, and the travel route through each parking lot in the extracted combination By searching for and guiding, it is possible to reduce the traveling of overlapping routes.

It is a block diagram of the navigation apparatus of this embodiment. It is a flowchart showing the content of the parking lot route search process. It is explanatory drawing showing the parking probability and travel route of the parking lot guided by this embodiment. It is a flowchart showing the content of the route guidance process. It is explanatory drawing in the case of guiding one parking lot.

Hereinafter, preferred embodiments of the navigation device and the navigation program of the present invention will be described in detail with reference to FIGS.
(1) Outline of Embodiment In this embodiment, when guiding a parking lot near a destination, the probability of parking can be improved efficiently by performing route search and guidance through a plurality of parking lots. .
In other words, a plurality of candidate parking lots are determined from the parking probability based on the fullness information (statistics) of each parking lot, and one of the parking lots to be guided to the last by passing through each candidate parking lot continuously The travel route is determined from the total parking probability that can be parked in the parking lot and the total distance cost to the destination.

Specifically, a parking lot around the destination that is a candidate for a via-route parking lot is detected, and each parking probability is acquired from the parking lot data. If the number of searched parking lots is N, a combination of M parking lots is obtained from the N parking lots, and a parking lot in which the overall parking probability of each combination is equal to or greater than a predetermined threshold Pt is searched. .
The total parking probability may be a total value P1 obtained by adding the parking probabilities of the respective parking lots, and the probability P2 of parking in any parking lot when passing through all parking lots, or parking for all parking lots The average value P3 of the probability may be used.
The transit parking lot candidates may be determined based on selection criteria such as the distance from the destination, the arrival time, and the fee.

In the present embodiment, the total distance cost for the travel route passing through each of the M parking lots (greater than or equal to the predetermined threshold Pt) included in the extracted combination is calculated, and the travel route having the smallest total distance cost is determined. The parking lot is guided according to the determined travel route.
In this way, when guiding a parking lot near the destination, guiding the route through multiple parking lots as a route for parking near the destination improves the probability of parking efficiently and overlaps the road. Travel is less.

However, the M parking lots may be guided to the user without searching for a travel route that passes through the searched M parking lots (the predetermined threshold Pt or more).
In this case, by displaying each of the M parking lots and their parking probabilities on a map displayed on the display, the user can confirm the positions and probabilities of the plurality of parking lots according to his / her favorite route. By passing through each parking lot, it is possible to reduce the number of overlapping road runs and stop at the parking lot.

When the device determines the travel route or guides the user to the parking lot, if all the parking lots of the M parking lots are full, the parking probability P of the entire combination is again determined in the same manner. A combination of parking lots that is equal to or greater than the predetermined threshold value Pt is extracted, guided to the user, or a travel route is determined.
In this case, the M parking lots actually passed are excluded.

  In the present embodiment, it is assumed that M parking lots are sequentially routed and parked in the first empty parking lot.

(2) Details of Embodiment FIG. 1 is a system configuration diagram of a navigation apparatus to which this embodiment is applied.
The navigation device is mounted on a vehicle and includes a current position detection device 10, an information processing control device 20, an input / output device 40, and an information storage device 50 as shown in FIG.

The current position detection device 10 is configured as follows.
The azimuth sensor 12 is a means for detecting an angle that has changed relative to a reference angle (absolute azimuth). In this embodiment, a gyro sensor that detects a change in angle using an angular velocity is used. Yes. Note that an optical rotation sensor attached to the rotating part of the handle, a rotary resistance volume, or an angle sensor attached to the wheel part may be used. Further, the direction sensor 12 may be, for example, a geomagnetic sensor that detects in which direction the vehicle is located from detection in the N direction based on a magnet, and may be a means for detecting an absolute direction.

The distance sensor 13 is a means that can measure the moving distance of the vehicle, and for example, a sensor that detects and counts the rotation of a wheel or a sensor that detects acceleration and integrates it twice.
The GPS (Global Positioning System) receiver 14 is a device that receives a signal from an artificial satellite, and includes various signals such as signal transmission time, position information of the receiver, moving speed of the receiver, and traveling direction of the receiver. Information can be obtained.

  The information processing control device 20 performs calculation and control based on information input from the current position detection device 10 and the input / output device 40 and information stored in the information storage device 50, and displays the calculation result on the display 42 and the printer 43. Or it is a means to control to output to output means, such as the speaker 44. FIG.

The information processing control device 20 is configured as follows.
The central processing unit (CPU) 21 performs overall calculation and control of the entire navigation device.
The ROM 22 guides a program related to navigation such as search for a route to a destination, display guidance, voice guidance, etc., a parking lot route search program for guiding through a plurality of parking lots according to the present embodiment, and a plurality of parking lots. Various programs such as route guidance programs are stored. The ROM 22 may be divided into a first ROM and a second ROM, and a navigation program related to voice guidance may be stored in the second ROM, and other programs may be stored in the first ROM.
The sensor input interface 23 is a means for receiving information from the current position detection device 10.

  The RAM 24 stores information input by the user such as destination information and passage point information input by the input device 41, and results calculated by the CPU 21 based on the user input information and route search It is a storage means for storing the map result read or the map information read from the information storage device 50.

The communication interface 25 is means for inputting / outputting various information via the transmission path 45. Specifically, the GPS receiver 14, the input device 41, the printer 43, and the information storage device 50 are connected via the transmission path 45.
The timepiece 28 is configured by using, for example, a crystal resonator, and clocks time or provides operation timing of each part of the navigation device by oscillation.
In addition, an image processor dedicated to image processing for processing vector information processed by the CPU 21 into image information, an image memory for storing image information processed by the image processor, and audio information read from the information storage device 50 are processed. However, a voice processor dedicated to voice processing to be output to the speaker 44 may be provided.

The input / output device 40 includes an input device 41 for inputting data such as a destination, a passage point, and a search condition by a user, a display 42 for displaying an image, a printer 43 for printing information, and a speaker 44 for outputting sound. The
The input device 41 includes, for example, a touch panel, a touch switch, a joystick, a key switch, and the like.
The display 42 displays a map around the current location and a travel route to the destination.
Note that the input / output device 40 may not include the printer 43.

The information storage device 50 is connected to the information processing control device 20 via the transmission path 45.
The information storage device 50 stores a map data file 51, a parking lot data file 52, and other data files 53.
The information storage device 50 is generally composed of an optical storage medium such as a DVD-ROM, a CD-ROM, or a magnetic storage medium such as a hard disk, but various types such as a magneto-optical disk and various semiconductor memories. You may comprise with an information storage medium.
Information that needs to be rewritten may be constituted by a rewritable hard disk or flash memory, and other fixed information may be a ROM such as a CD-ROM or DVD-ROM.

The map data file 51 stores map data, road data, destination data, guidance point data, detailed destination data, and other data as various data necessary for map display, route search, and route guidance in navigation. Yes.
As map data, a national road map, a road map of each region, a house map, or the like is stored. The road map is composed of roads such as main arterial roads, expressways, narrow streets, and ground targets (facility etc.). A house map is a city map in which a figure representing an outer shape of a ground building, a road name, and the like are displayed. The narrow street is, for example, a relatively narrow road having a road width equal to or less than a predetermined value below a national road or prefectural road.
As for the map data, a map of a predetermined range including a current vehicle position and a point designated by the user is displayed on the display 42 at a predetermined scale. On this map, the current position of the vehicle and the designated point are displayed.

The road data is data regarding roads such as the position and type of each road, the number of lanes, and the connection relationship between the roads, and is composed of node data and link data. The road data is used for route search and map matching, and is also used when the searched travel route is displayed over the map data.
The node data is data representing geographic coordinate data of each node used for route search on a map.
For example, a road connection point such as an intersection is represented by a node, and a road between the connection points (that is, a non-branching area of the road) is represented by a link. In this way, it functions as route data representing the connection relation of the node data route.
In addition, for those where travel is restricted due to traffic restrictions, such as entry prohibition and one-way traffic, attributes indicating this are given to each link, but these attributes should be given to intersection nodes. Also good.
Node data is supplementary to characteristic points between intersections (for example, points at the start, middle and end of a curve, and points where the altitude changes), along with intersection nodes that are always set for each intersection. There is an auxiliary node that may be set to The intersection node includes information related to the intersection such as the geographical position coordinates and name of the intersection.

The destination data is data such as the locations and names of places and facilities that are likely to be destinations such as major tourist spots, buildings, and companies / businesses described in the telephone directory.
Guidance point data is guidance data of a point where guidance is required, such as the content of a guidance display board installed on a road and guidance of a branch point.
The destination data includes a parking lot as a facility, and when any destination (excluding the parking lot) is set by the user, the target of the parking lot route search of the present embodiment via a plurality of parking lots. As a result, a parking lot around the set destination is searched.

The parking lot data file 52 stores full / vacant information of each parking lot included in the destination data. As the fullness information in the display, the parking probability that can be parked in each parking lot is stored for each day of the week and time zone. This fullness information may be acquired in real time, or may be both based on statistical information or the like.
The vacancy information by statistics is accumulated storage of past parking lot vacancy information for each day of the week and every time zone, and based on the statistical result of the accumulated vacancy information, the vacancy information for each day of the week and every time zone is calculated. The This fullness information is calculated by an information processing device or an information center installed in each parking lot.
In addition, the parking probability may be stored in a more detailed classification including the season and the month.
Further, when the parking amount is different from a normal amount such as a specific event day (for example, New Year's Day or a national holiday), the parking probability on the specific event day may be stored. In this case, the parking probability may be stored for each time zone.

In the present embodiment, the vacancy information is obtained by acquiring specific data obtained by collecting the vacancy information for each parking lot, communicating from an information center, reading from a storage medium such as a CD, and other various methods. Save to the data file 52.
Regarding the collection of full / vacant information, it may be obtained and updated sequentially from a predetermined information center, or may be obtained directly from each parking lot.

  The other data file 53 includes, for example, image data of a photograph showing places where visual indications such as various facilities and sightseeing spots or major intersections are required, and when a set travel route is guided by voice. Audio data and the like are stored.

Next, the operation of the embodiment configured as described above will be described.
In the parking lot route search described below, when a destination is set, a travel route that passes through a plurality of parking lots in the vicinity thereof is determined.
In this case, the parking lot key which instruct | indicates the parking lot route search of this embodiment is arrange | positioned on a map screen etc., and when this parking lot key is selected, the parking lot route search demonstrated below is performed.

FIG. 2 is a flowchart showing the contents of the parking lot route search process.
First, the information processing control device 20 acquires a destination (step 11). In this embodiment, since the navigation apparatus mounted on the vehicle is assumed, the destination is acquired by the destination set by the user in the destination setting process in the navigation function.

Next, the information processing control device 20 searches for a parking lot around the acquired destination (step 12). In the following description, it is assumed that the number of searched parking lots is N.
The search for the parking lot around the destination is performed in a predetermined range including the acquired destination, for example, a predetermined distance r1 centered on the acquired destination (for example, a distance L = 1 km, 2 km, etc. that can be moved to the destination on foot) A search is made from the destination data in the map data file 51 using a parking lot existing in a region having a radius as a candidate parking lot.
Note that the predetermined range may be widened from the destination to the vehicle side and the opposite side from the vehicle to be narrowed. For example, a parking lot that exists in an area having the radius of the predetermined distance r1 and whose distance from the intersection of the straight line connecting the vehicle position and the destination and the area (circle) is within r2 (<r1) is set as a candidate parking lot. Also good.

  The information processing control device 20 acquires the parking probability for each searched candidate parking lot from the fullness information of the parking lot data file 52 (step 13).

Next, the information processing control device 20 searches for a combination of M parking lots in which the overall parking probability P is equal to or greater than a predetermined threshold value Pt (step 14).
That is, the information processing control device 20 obtains all combinations of the M parking lots to be guided from the searched N parking lots based on the acquired parking probabilities, and determines the parking probability of the entire parking lot combination. Is calculated for each combination. In the present embodiment, M = 5 is set, but the user may be able to increase or decrease appropriately.
The total parking probability may be a total value P1 obtained by adding the parking probabilities of the respective parking lots, and the probability P2 of parking in any parking lot when passing through all parking lots, or parking for all parking lots Although the average value P3 of probability may be sufficient, the specific value of the predetermined threshold value Pt differs depending on which one is adopted.

The probability TP that can be parked in any parking lot is obtained as follows.
It calculates | requires as follows from the probability that it cannot park at each parking lot.
When the parking probability of a certain parking lot m is pm (≦ 1), the probability qm that the parking lot m cannot be parked is qm = (1−pm).
The probability Q that the vehicle cannot be parked in any of the M parking lots is obtained from Q = q1 × q2 ×.
And the probability P2 which can be parked in any of the M parking lots is P2 = (1-Q).

After searching for a combination having an overall parking probability equal to or greater than the threshold value Pt, the information processing control device 20 calculates the total distance cost of the route passing through the parking lot for each combination (step 15).
That is, the information processing control device 20 sets each of the M parking lots included in the combination as a waypoint, searches for a route from the current position or the departure place to the destination acquired in step 11, and determines the route. The total distance cost is calculated from the sum of the distance costs of the roads constituting the road.
The order of passing through the M parking lots is determined by M permutations, and the search of each route and the total distance cost when passing in each order of Z1 = M × (M−1) ×... 3 × 2. Ask. As a result, if the number of combinations of the M parking lots is Z2, the total distance cost is calculated for each of the routes of Z1 × Z2.

The information processing control device 20 determines a travel route based on the total distance cost of each travel route for all combinations of M parking lots (step 16), and returns to the main routine.
In the present embodiment, the route having the minimum total distance cost for each calculated route is determined as the travel route, and the determined travel route is stored in the RAM 24.
It should be noted that the upper predetermined number of travel routes with a low total distance cost are presented to the user as candidate routes, and one of them is selected by the user, and the selected candidate route is determined as the final travel route. It may be.

FIG. 3 shows an example of the travel route searched by the parking lot route search of the present embodiment.
As shown in FIG. 3, with respect to the set destination G, as described in FIG. 5A, p1, p2, p3, p4, and p5 in descending order of the parking probability of each parking lot. An example will be described.
In the present embodiment, instead of guiding only one parking lot with the highest probability or a parking lot close to the destination, a travel route Y that sequentially passes through M (= 5) parking lots is displayed on a map. In accordance with the travel route Y, the parking lots p1, p2,.

In the present embodiment, the total distance cost is taken into consideration, and therefore, the route does not necessarily go through in descending order of parking probability. For example, as shown in FIG. 3, guidance is performed in the order of p1, p3, p2, p5, and p4.
Then, the information processing control device 20 guides the first parking lot p1 along the travel route, and if the parking lot p1 is not fully parked, guides the next parking lot p3 along the travel route Y. Below, we will guide you in order until you find a vacant parking lot that you can park. In the example of FIG. 3, since the parking lot p5 is vacant, the vehicle can park in this parking lot p5.
Whether the guided parking lot is vacant or full, the information processing control device 20 may pass the guided parking lot or if it goes out of the parking lot even if it enters the parking lot. Judge that the vehicle is full and cannot be parked, and will guide you to the next parking lot. On the other hand, if the ignition is turned off or the guidance end is input in the parking lot, it is determined that parking is possible.

Next, the contents of the route guidance process will be described with reference to the flowchart of FIG.
The information processing control device 20 acquires the determined travel route from the RAM 24 (step 21), and performs guidance according to the acquired travel route (step 22).
This travel route guidance is the same as the conventional travel route guidance, and is performed as follows, for example.
That is, the information processing control device 20 detects the current position with the current position detection device 10, reads the map information around the current position from the map data file 51 of the information storage device 50, and displays it on the display 42. Further, the travel route determined by the parking lot route search in FIG. 3 is displayed on the display 42 in accordance with the map display.
The information processing control device 20 performs route guidance by tracking the current position detected by the current position detection device 10.
In the route guidance, the vehicle position on the map is specified by map matching between the road data corresponding to the searched driving route and the current position detected by the current position detection device 10, and a map around the vehicle current position is displayed on the display 42. Then, the searched travel route is displayed on the map, and a current position mark (indicated by Δ in the circle in the traveling direction in FIG. 3) indicating the current position of the vehicle is displayed on the map.
Also, based on the relationship between the searched travel route and the current position, the necessity of guidance, that is, whether or not guidance for a travel route such as a predetermined route change point and direction guidance is necessary when straight traveling continues for a predetermined distance or more, etc. Judgment is made, and if necessary, display on the display 42 and voice guidance are executed.

The information processing control device 20 determines whether or not the vehicle has arrived at the transit parking lot (step 23). If the vehicle is not a parking lot (step 23; N), the process returns to step 22 and continues route guidance.
On the other hand, when the vehicle arrives at the via parking lot (step 23; Y), the information processing control device 20 determines whether or not the parking lot can be parked at the guided (via) parking lot (step 24). (Step 24; Y), the process returns to the main routine.

When the vehicle continues to travel without being parked in the guided parking lot (including not only when the vehicle is full but also when the user has not intentionally parked) (step 24; N), the information processing control device 20 It is confirmed whether or not there is a route parking lot that is a guidance target (step 25).
When there is a next guidance parking lot (step 25; Y), the information processing control device 20 returns to step 22 and continues route guidance to the next parking lot.

On the other hand, when there is no next guided parking lot, that is, when it is the last parking lot through which the guided parking lot passes (Step 25; N), the information processing control device 20 provides guidance on the currently guided travel route. A parking lot route search is performed on (N−M) parking lots, excluding the completed parking lot (passing parking lot) from the target (step 26).
In this case, since the destination has already been acquired, the parking lot route search is for (N−M) parking lots that exclude the passing parking lot from the N parking lots searched in step 12 of FIG. Then, the processing after step 13 is performed. However, since the parking probability for each parking lot has already been acquired in the first parking lot route search, this is also temporarily stored in the RAM 24, and in step 12, the parking probability in the RAM 24 is used in the re-search. Also good.

In addition, in the case where the parking lot route search is performed again in step 26, the case where the already-explained parking lot is excluded from the N parking lots searched in step 12 has been described. Further, the parking probability pm is a predetermined threshold value pt. You may make it narrow down to the parking lot which is the above, and perform a parking lot route search again.
Thereby, it can be set as the driving | running route which can be parked reliably.

As described above, according to this embodiment, the following effects can be obtained.
(1) When guiding the parking lots around the destination, instead of guiding a single optimal parking lot, the travel route that uses multiple parking lots is determined and guided sequentially, so it is higher. You can park at any parking lot with probability.
(2) Even if the guided parking lot is full, instead of searching and guiding the route to another parking lot each time, the travel route is determined as a point that passes through a plurality of parking lots in advance. Because it is, you can quickly guide the next parking lot.
(3) Since it is searching for a travel route that passes through a plurality of parking lots, it is possible to reduce traveling on the same road and to move efficiently to the parking lot.
(4) Furthermore, since a plurality of travel routes passing through each parking lot are searched and a travel route having the smallest total distance cost is determined and guided among the travel routes, the total travel amount (travel distance) Can be reduced.
(5) Even when all the guided parking lots are full, the travel route passing through the other multiple parking lots is determined and guided, so that parking can be performed more reliably.

The embodiment of the navigation device and the navigation program of the present invention has been described above, but the present invention is not limited to the described embodiment, and various modifications can be made within the scope described in each claim. It is.
For example, in the described embodiment, according to the parking lot route search of FIG. 2, a combination of M parking lots in which the overall parking probability P is equal to or greater than a predetermined threshold Pt is searched (step 14), and then M parking lots are obtained. Although the case where the travel route passing through the vehicle is searched for has been described, the travel route passing through the parking lot may not be searched.
That is, a combination of M parking lots where the parking probability P of the entire parking lot is the predetermined threshold value Pt may be searched, and the M parking lots having the highest parking probability may be displayed on the map.
Thereby, the user can travel to each parking lot by judging himself / herself a route avoiding the overlapping route while considering the distance from the destination to each parking lot. In this case, unlike the case where all the parking lots around the destination are displayed, since the parking lot with a high overall parking probability P is displayed, it is lost because there are too many parking lots to go through or run through. There is nothing to do.

In the modified example, the parking probability may be displayed for each of the displayed M parking lots.
Thus, the user can select the order of passing by referring to the parking probability and the distance to the destination.

Moreover, although the vehicle-mounted navigation device has been described in the embodiment, the functions of each navigation device described above may be provided in the information processing server of the information center.
In the information center in this case, the destination is acquired by communication from the in-vehicle navigation device, the parking lot around the acquired destination is searched by the parking lot route search described in the present embodiment, and the searched parking lot is passed through. The travel route is transmitted to the in-vehicle navigation device.
Similarly to the modified example described above, not only a case where a traveling route passing through a plurality of parking lots is determined and transmitted to the in-vehicle navigation device, but also the determined candidate parking lot may be transmitted to the in-vehicle navigation device. In this case, the parking probability of each parking lot may be transmitted in addition to the parking lot.
In both of the above-described modifications, if the in-vehicle navigation device guides the parking lot received from the information center (both guidance by the parking lot display and the guidance of the travel route), and if parking is not possible in any of the parking lots, The navigation device transmits information indicating that parking is impossible to the information center.
When the information center receives information indicating that parking is impossible, the information center searches for the parking lot again (or determines the candidate parking lot) except for the parking lot that is the guidance target, and transmits the information to the in-vehicle navigation device again.

  That is, in the case of an example of searching for a travel route, the information center performs the parking lot route search of FIG. 2 and transmits the travel route to the in-vehicle navigation device at the end of the process, while receiving the travel route. In the apparatus, Steps 21 to 25 in FIG. 4 are performed, and when there is no next parking lot (Step 25; N), the fact that parking is impossible is transmitted to the information center, and the information center is unable to park. Is received, the result is transmitted to the in-vehicle navigation device.

Moreover, when parking in the parking lot on the way, you may make it display on the screen the movement path | route by the walk from the parking lot to the destination.
In this case, the walking movement route to the destination is searched and displayed at the time of parking. In the parking route search (FIG. 2), each walking movement route from each parking lot to the destination is searched in advance. Alternatively, the walking movement route from the parking lot may be displayed during parking.
Whether or not to park is determined, for example, by making an inquiry by voice or screen display and answering it (voice recognition, selecting an affirmative key).

  Further, when calculating the total distance cost, the distance cost of each road may be changed according to the distance from the destination. For example, by reducing the distance cost for a road closer to the destination, a parking lot closer to the destination can be easily selected, and movement to the destination after parking becomes easier.

In addition, the combination of M parking lots is searched for all the N parking lots searched in step 12, and parking probability pm of N parking lots is equal to or less than a predetermined threshold value pt. You may make it exclude a parking lot.
Thereby, in the parking lot route search again, M parking lots that can be more reliably parked can be determined and guided.

In the described embodiment, the overall parking probability is used to search for a combination of M parking lots where the overall parking probability P is greater than or equal to a predetermined threshold Pt, and the final travel route determination is a total distance cost. It is decided by.
On the other hand, you may make it determine from both the probability P2 and the total distance cost which can be parked in any parking lot among the whole parking probabilities P.
When the probability of parking in any parking lot when passing through M parking lots on a certain travel route is P2m (the calculation method is as described in the embodiment), and the total distance cost for that travel route is Lm Then, a probability cost value Um represented by the following equation (1) is obtained. Then, the travel route with the smallest probability cost U is determined. Similar to the described embodiment, the user may be presented with a predetermined number of upper traveling routes with lower costs.

  Um = P2m × α + Lm × β (1)

In Equation (1), α and β are a parking coefficient and a cost coefficient for adjusting the value of the overall parking probability P2 and the value of the total distance cost Lm.
These two coefficients may be set and changed according to the preference for parking.
That is, when the user desires to park more reliably, the cost coefficient β is not changed and the parking coefficient α is changed to a smaller value.
Conversely, when the user desires to make the travel distance as small as possible, the cost coefficient β is changed to a smaller value without changing the parking coefficient α.

10 current position detection device 20 information processing control device 21 CPU
40 I / O device 50 Information storage device 51 Map data file 52 Parking lot data file

Claims (6)

A destination acquisition means for acquiring a destination;
A parking lot search means for searching for a parking lot existing in a predetermined area including the acquired destination;
Parking probability acquisition means for acquiring a parking probability that can be parked for each searched parking lot;
A parking lot extraction means for extracting a combination of parking lots such that an overall parking probability P of the combination of the parking lots is equal to or greater than a predetermined threshold Pt;
Distance cost calculation means for calculating a total distance cost for a route passing through the parking lot for each combination of the extracted parking lots,
A travel route determination means for presenting the user a top predetermined number of travel routes with a low total distance cost for each calculated route, and determining the travel route selected by the user as a final travel route;
In accordance with the travel route determined by the travel route determination means, guidance means for guiding a parking lot via the travel route;
A navigation device comprising: The parking lot extraction means uses, as the overall parking probability P, a probability P2 of parking in any parking lot when passing through all parking lots to be combined.
The navigation device according to claim 1. The distance cost calculating means calculates the total distance cost by changing the distance cost of the road according to the positional relationship with the destination.
The navigation device according to claim 2.   The navigation device according to claim 2, wherein the parking lot extraction unit sets a parking lot having a parking probability equal to or higher than a predetermined value as a target of the combination. When the last parking lot guided by the guide means could not be parked, the travel route determination means determines the travel route again by excluding each guided parking lot from being routed.
The navigation device according to claim 1. Computer
A destination acquisition means for acquiring a destination;
A parking lot search means for searching for a parking lot existing in a predetermined area including the acquired destination;
Parking probability acquisition means for acquiring a parking probability that can be parked for each searched parking lot;
A parking lot extraction means for extracting a combination of parking lots such that an overall parking probability P of the combination of the parking lots is equal to or greater than a predetermined threshold Pt;
Distance cost calculation means for calculating a total distance cost for a route passing through the parking lot for each combination of the extracted parking lots,
A travel route determination means for presenting the user a top predetermined number of travel routes with a low total distance cost for each calculated route, and determining the travel route selected by the user as a final travel route;
The navigation program for functioning as a guidance means which guides the parking lot via the said travel route according to the travel route determined by the said travel route determination means.

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