JP3586120B2 - Route search display device - Google Patents

Description

[0001]
[Industrial applications]
The present invention relates to a navigation device that displays a current position of an automobile or the like on a display device together with a map, and particularly to a route search display device that searches for a route to a destination and displays a search route on the display device.
[0002]
[Prior art]
FIG. 10 shows an outline of a vehicle-mounted navigation device. In FIG. 10, reference numeral 1 denotes a direction sensor, which includes a geomagnetic sensor for detecting the absolute running direction of the vehicle, a vibration gyro for detecting the relative running direction of the vehicle, and the like. Reference numeral 2 denotes a distance sensor that generates a pulse corresponding to the number of rotations of the wheels, and 3 denotes various sensor signals such as an on / off signal of a brake switch, a parking switch, and the like, and a power supply voltage monitoring signal. Reference numeral 4 denotes a sensor signal processing unit for processing sensor signals of the azimuth sensor 1, the distance sensor 2, and the like. Reference numeral 5 denotes a GPS (Global Positioning System) receiver. The GPS receiver 5 receives radio waves transmitted from a plurality of satellites. The position (latitude, longitude) of the receiving point can be obtained by the calculation. Reference numeral 6 denotes a CD-ROM drive. The CD-ROM drive 6 reads map data from a CD-ROM 7 on which map data is recorded. Reference numeral 8 denotes a display / operation unit installed in the vehicle compartment. The display / operation unit 8 is provided on a liquid crystal display 8A for displaying a map, a current traveling position, a direction, and the like of the automobile, and is provided on a front surface of the liquid crystal display 8A. The touch panel 8B includes a switch for instructing enlargement or reduction of a display map, a switch for instructing a route search, a switch for selecting a destination from the place names displayed on the liquid crystal display 8A, and the like. Is provided. 8C is a cursor key for moving a cursor displayed on the screen in an arbitrary direction and inputting a selected position on the screen. 9 is an apparatus main body.
[0003]
Next, the configuration of the apparatus main body 9 will be described. Reference numeral 10 denotes a CPU (Central Processing Unit) for performing various calculations, 11 denotes a ROM (Read Only Memory) storing programs for various calculations performed by the CPU 9, 12 denotes an azimuth sensor 1, a distance sensor 2, a GPS receiver 5, a CD A memory (DRAM) 13 for storing data from the ROM drive 6 and the results of operations performed by the CPU 10, and a backup 13 for holding necessary data even when power supply to the apparatus main body 9 is stopped. A memory (SRAM) 14, a memory (kanji, font ROM) storing patterns of characters and symbols to be displayed on the liquid crystal display 8A, and a display image 15 based on map data, current position data of the own vehicle, etc. An image processor 16 for outputting map data, current position data, kanji, and font ROM 1 output from the CPU 10. A memory (VRAM) for storing an image to be displayed on the liquid crystal display 8A by synthesizing kanji characters and fonts such as street names and road names output from the VRAM, and 17 is an RGB conversion circuit for converting output data of the VRAM 16 into color signals. The color signal is output from the RGB conversion circuit 17 to the liquid crystal display 8A. 18 is a communication interface.
[0004]
FIG. 11 shows a format of data stored in the CD-ROM 7, 21 is a disk label, 22 is a drawing parameter, 23 is map management information, and 24 is a map. Character data, road data, and the like are stored, and data for each unit map obtained by dividing a topographic map of the whole of Japan by latitude and longitude is stored. In the figure, a figure that describes a wide area roughly and a figure that describes a narrow area in detail are set. Each figure is composed of map display levels A, B, and C describing the same area. The map display levels A, B, and C describe B in more detail than A and C in more detail than B. Each of the map display levels A, B, and C is composed of map display level management information and a plurality of units. Each unit describes a divided area obtained by dividing the area at each map display level into a plurality of areas. Each unit includes a unit header, a character / symbol layer, a background layer, a road layer, an optional layer, and the like. The character / symbol layer records place names, road names, facility names, and the like displayed on the map, the background layer records data for drawing roads, facilities, and the like. As shown in FIG. 12, data on coordinate points (nodes) and lines (links) describing roads including intersections, for example, node numbers of nodes, latitude and longitude, link numbers of links, link distances, and the like are stored. In FIG. 12, circles (○) indicate nodes, and lines between the nodes indicate links. A black circle (丸) of the node number 4 indicates an intersection node. Note that the data recorded in the road layer is not directly involved in the map display, but is used as road network information for map matching.
[0005]
In FIG. 11, reference numeral 25 denotes route search data. The route search data 25 includes search data recorded for each layer from layer 0 for a narrow area to layer n for a large area. The search data of each layer includes node connection data 26, route search evaluation value (link cost) data 27, and route display data 28. The node connection data 26 is data indicating to which other node each node is connected. The link cost data 27 is an evaluation value set for a link between the nodes, and the link cost is an evaluation value indicating an estimated passage time of the link. The route display data 28 records data for displaying the route selected by the route search on the display map.
[0006]
Next, the operation of the navigation device configured as described above will be described. In FIG. 10, the output of the direction sensor 1 and the output of the distance sensor 2 are sent to the CPU 10 via the sensor processing unit 4. The CPU 10 calculates the current position of the vehicle, and obtains the latitude and longitude of the current position. Further, the current position is corrected based on the data from the GPS receiver 5. The map data of the unit corresponding to the current position is read out from the CD-ROM 7 by the CD-ROM drive 6 based on the current position thus obtained, and the map data is stored in the memory (DRAM) 12 via the communication interface 18. Is stored in A part of the map data stored in the DRAM 12 is read by the CPU 10, converted into image data by the image processor 15, and written into the image memory 16. The image data stored in the image memory 16 is converted into color signals by the RGB conversion circuit 17 and sent to the liquid crystal display 8A, where a map of a predetermined range centering on the current position is displayed. If the map data read from the DRAM 12 includes character codes and symbol codes, patterns corresponding to these character codes and symbol codes are read from the kanji and font ROM 14, and are displayed on the liquid crystal display e4e457A together with the map. , Etc., and symbols such as school are displayed. Further, the current position displayed on the liquid crystal display 8A is sequentially changed based on the traveling speed and the traveling azimuth sequentially obtained as the vehicle travels.
[0007]
Next, the operation of the conventional route search will be described with reference to FIGS. As shown in FIG. 13, first, a destination is set in step S1. The setting of the destination is performed by operating the touch panel 8B, for example, by inputting the address of the destination or by specifying a point on the map displayed on the liquid crystal display 8A. In step S2, it is determined whether to start a route search. This determination is made based on whether or not the route search switch on the touch panel 8B of the operation / display device 8 has been operated. If it is determined in step S2 that the route search switch has been operated, the process proceeds to step S3, where a route search is performed. In this route search, the link costs of all the routes from the departure point (current position node) to the destination node are added, and the route with the lowest link cost is selected. The route selected in step S3 is displayed, for example, in red on the display map of the liquid crystal display 8A in step S4.
[0008]
FIG. 14 shows step S3 of the route search in FIG. 13 in more detail. In FIG. 14, first, in step S11, a departure node and a destination node closest to the departure and destination positions are selected. Next, in step S12, route search data including the departure node is read from the CD-ROM 7, and in step S13, a route search on the departure point side is performed. As described above, this route search selects a route with the lowest total link cost. Next, in step S14, it is determined whether the route searched in step S13 is connected to the destination node. If the distance from the departure point to the destination is relatively short and the data read from the CD-ROM 7 includes the destination node in step S12, it is determined YES in step S14, If the destination is far, it is determined NO in step S14, and the process proceeds to step S15. In step S15, route search data including the destination node is read from the CD-ROM 7, and in step S16, a route search on the destination side is performed. In step S17, it is determined whether the route selected by the route search on the destination side in step S16 is connected to the search route on the departure side. If the result of this determination is no, the search hierarchy is raised by one rank in step S18. If the read data in steps S12 and S15 is the route search data of layer 0, the rank is raised to layer 1 in step S18. Next, in step S19, the starting node and the destination node are reset, and the process returns to step S12. If the determination is YES in step S14 or step S17, a route from the departure place to the destination is formed in step S20, route display data is created in step S20A, and this process ends. The route selected by the above route search process is displayed on the map displayed on the liquid crystal display 8A.
[0009]
[Problems to be solved by the invention]
However, in the above-described conventional route search and display processing, it is not possible to determine whether or not there is a parking lot at the destination (facility). Had to drive around the destination and look for a parking lot.
[0010]
The present invention has been made to solve the above Symbol conventional problems, it can be determined whether or not there is a parking facility to the destination or purpose, if there is no parking, the destination or purpose A route search and display device capable of searching for a parking lot around a facility and displaying the route, and further displaying a route from the parking lot around the destination or destination facility to the destination or destination facility. The purpose is to provide.
[0011]
[Means for Solving the Problems]
In order to achieve the above object, according to the present invention, based on parking lot data read from a map data storage unit, the presence or absence of a parking lot at a destination or facility input from an input unit is determined by a parking lot presence / absence determining unit. If there is no parking lot, the parking lot around the destination or facility is extracted by the parking lot extracting means, and the parking lot determined by the parking lot existence judging means to have a parking lot or the parking lot extracted by the parking lot extracting means The route up to is searched by the route search means and displayed on the display means. Thus, if there is no parking lot at the destination or the target facility at the time of the route search, it is possible to search for a parking lot around the destination and display a route to the parking lot.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
According to a first aspect of the present invention, there is provided a map data storage unit in which road data and parking lot data are recorded, a current position calculation unit for detecting a current position of the own vehicle, and a readout from the map data storage unit. Display means for displaying the obtained road map and the current position of the own vehicle obtained by the current position calculation means, input means for inputting a destination or a destination facility, and read from the map data storage means. A parking lot presence / absence determining means for determining the presence / absence of a parking lot at the destination or facility inputted from the input means based on the parking lot data; and a parking extracting means for extracting the parking lots around the input destination or facilities, and to the parking lot existence determining unit destination or purpose of the input by the facility Parking determination In the case where the vehicle is located, the route from the current position to the input destination or the destination facility is searched, and on the other hand, it is determined that there is no parking lot at the destination or the destination facility input by the parking lot presence / absence determining means. when the can and searches for a route to the parking lot that has been extracted by the current position or al upper Symbol Parking extraction means, these pathways in the route search display apparatus and a route searching means for displaying on the display means Yes, if there is no parking lot at the destination or destination facility, search for and search for parking lots around it, then set the searched parking lot as the destination and perform a route search. The displayed route can be displayed on the display means.
[0013]
According to a second aspect of the present invention, when one of a plurality of parking lots extracted by the parking lot extracting means and displayed on the display means is selected by the input means, the selected parking lot is selected. 2. The route search and display device according to claim 1, wherein a route to the parking lot is searched for by a route search means and displayed on the display means, and the route search is performed using the parking lot selected by the selection means as a destination. Then, the searched route can be displayed on the display device.
[0014]
According to a third aspect of the present invention, when there is no parking lot at the input destination or facility, the destination or facility is extracted from the parking lot around the destination or facility extracted by the parking lot extraction means. 3. The route search and display device according to claim 2, wherein a route to the parking lot is searched for by the route searching means and is displayed on the display means. The route to the facility to be set can also be displayed on the display means.
[0015]
The invention according to claim 4 of the present invention is characterized in that the display of the route to the parking lot displayed on the display means is different from the display of the route from the parking lot to the destination or facility. This is a route search display device that can easily distinguish a traveling course of the own vehicle from a walking course.
[0016]
According to a fifth aspect of the present invention, when there is no parking lot at the input destination or facility, the destination or facility is extracted from the parking lot around the destination or facility extracted by the parking lot extraction means. The route search and display device according to any one of claims 1 to 4, wherein the input means indicates whether or not the route to the route is searched by the route search means. The user can select whether or not to search the route from the parking lot around the destination or the facility to the destination or the facility by the route search means.
[0017]
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(Embodiment)
FIG. 1 shows a route search and display device according to an embodiment of the present invention, which is a simplified version of the navigation device shown in FIG. 10, and the overall operation is almost the same. In FIG. 1, reference numeral 101 denotes map data storage means such as a CD-ROM in which road data and parking lot data are recorded, 102 denotes current position calculation means for detecting the current position of the vehicle based on information from a GPS receiver or the like, 103 Is a display means such as a liquid crystal display for displaying the road map read from the map data storage means 101 and the current position of the own vehicle obtained by the current position calculation means 102, and 104 is a destination or a destination facility. An operation input unit 105 such as a touch panel determines whether or not there is a parking lot at the destination or facility input from the operation input unit 104 based on the parking lot data read from the map data storage unit 101, and parks there. If there is no parking lot, the parking lot extracting means 106 for extracting a parking lot around the input destination or facility is located at the current position. Searches for a route from the current position of the vehicle calculated by the calculation means 102 to the parking lot that has been extracted by the parking lot extracting unit 105, a route search means for displaying on the display unit 103. Reference numeral 107 denotes control means for controlling the entire route search and display device.
[0018]
FIG. 2 shows the format of data stored in the map data storage means 101 used in the present embodiment. Only the differences from the format stored in the conventional CD-ROM shown in FIG. 11 will be described. Reference numeral 29 denotes index data for facility search. The index data 29 includes a table 30 for searching for a facility from Japanese syllabary, a word list 31 for searching for a facility from words included in a name, and a list of each facility. The facility information list 32 includes facility names, types, latitude / longitude, administrative area codes, parking lot information, and the like. By using the table 30, the facility can be searched from the input kana, and by using the word list 31, the facility can be searched from the input word, and the facility information list 33 is used privately. Thereby, the parking lot information 33 can be searched.
[0019]
Next, the route search according to the present embodiment will be described with reference to FIG. In FIG. 3, the target facility is set in step S101. For example, as shown in FIG. 4, the setting of the facility is performed by designating the facility on the map displayed on the display means 103 with the cursor 41, or by inputting the kana or word of the facility. When the destination is set by inputting the kana or word of the facility, the index data 29 recorded in the map data storage unit 101 is used. In step S102, the parking lot information 33 of the facility information list 32 of the facility set in step S101 is read from the map data storage unit 101. In step S103, the presence or absence of a parking lot is determined from the parking lot information 33 acquired in step S102. If it is determined in step S103 that there is a parking lot, the process proceeds to step S114. If it is determined that there is no parking lot, the process proceeds to step S104. When proceeding to step S104, the display means 103 displays a selection screen 42 as to whether or not to select a parking lot approach guide, as shown in FIG. If "Yes" on the selection screen 42 is selected with a cursor, the process proceeds to step S105, and a parking lot within a predetermined distance range around the destination is searched. In the next step S106, a list of the searched parking lots is created, and a mark 43 indicating the parking lot is displayed at the searched parking lot position in the map displayed on the display means 103 as shown in FIG. You. In the next step S107, one of the parking lot marks 43 shown in FIG. FIG. 7 shows a state in which the information of the parking lot selected in step S107 is displayed on the display means 103, and the parking lot information display screen 44 displays data such as the name of the parking lot, the business hours, the number of accommodations, and the usage fee. Is displayed. When "to map" is selected on this screen, a destination mark 45 indicating a target facility position and a parking mark 46 selected from parking lots around the destination are displayed as shown in FIG. You. Next, in step S108, the parking lot selected in step S107 is set as a destination, and in step S109, a route search to this destination is performed. In step S110, the parking lot selected in step S107 is set as a departure place, the facility set in step S101 is set as a destination, and a route search is performed in step S111. In step S112, the route searched in the route search in step S109 is displayed on the map displayed on the display means 103. In step S113, the route from the parking lot searched in the route search in step S111 to the target facility is displayed. Is displayed on the map of the display means 103.
[0020]
FIG. 9 shows a display example when the vehicle travels along the route displayed on the display means 103 and the distance to the selected parking lot is within a predetermined distance range, and the own vehicle position mark 47 is selected. When the distance is within the predetermined distance range, an enlarged view 48 around the parking lot is displayed on the screen on the right half of the display means 103. In the enlarged view 48 of FIG. 9, 49 indicates a route from the parking lot searched in the route search in step S109, and 50 indicates a route from the parking lot searched in the route search in step S111 to the target facility. ing. In the present embodiment, the route 49 is indicated by, for example, a red line, and the route 50 is indicated by a footprint mark.
[0021]
In FIG. 3, when it is determined in step S103 that the target facility has a parking lot, or when the parking lot approach guide is not selected in step S104, the process proceeds to step S114 to the facility set in step S101. Is performed, and the route searched in step S115 is displayed on the display unit 103.
[0022]
As described above, according to the present embodiment, when there is no parking lot at the target facility, a parking lot around the target facility is searched and displayed on the display means 103, and the displayed parking lot is displayed. When one of the parking lots is selected, a route from the own vehicle position to the selected parking lot is searched and displayed, and a route search from the selected parking lot to the target facility is performed. The route for the guided walk is also displayed on the map on the display means 103, so that even if the target facility does not have a parking lot, it is not necessary to travel around the target facility to search for a parking lot. Since the walking course from the parking lot to the target facility is displayed on the display means 103, the walking course to the target facility can be grasped in advance.
[0023]
In the above-described embodiment, the facility is set as the destination in the route search shown in FIG. 3, but a desired point on the map displayed on the display means 103 is set as the destination with the cursor. You can also. The operation may be instructed by voice input from the operation input unit 104.
[0024]
【The invention's effect】
According to the present invention, as is apparent from the above embodiment, even when there is no parking lot at the destination, the parking lot around the destination can be searched and displayed on the display means, and the parking lot around the destination can be searched. It has the effect that there is no need. If there are multiple parking lots around the destination, select one of them and a route search will be performed with this selected parking lot as the destination, and the route to the selected parking lot will be displayed. It has the effect of being done. Furthermore, when there is no parking lot at the destination, the route to the surrounding parking lot is displayed on the display means, and the course from the surrounding parking lot to the destination can be displayed on the display means. Furthermore, since the route to the parking lot around the destination and the route from this parking lot to the destination can be displayed in a different form on the map of the display means, the traveling course and the walking course can be easily determined. Has an effect. Further, there is an effect that the user can select whether or not to search for a route along a walking course from the parking lot around the destination to the destination.
[Brief description of the drawings]
FIG. 1 is a block diagram of a route guidance display device according to an embodiment of the present invention; FIG. 2 is a data format diagram of map data storage means in the embodiment; FIG. 3 is an operation flow diagram of route search in the embodiment; FIG. 4 is a screen diagram showing a display example when a destination is set in the embodiment; FIG. 5 is a screen diagram showing a display example when an approach guide is selected in the embodiment; FIG. 7 is a screen diagram showing a display example when a parking lot is selected. FIG. 7 is a screen diagram showing a display example of guidance information of a selected parking lot in the embodiment. FIG. 8 is a diagram showing a selected parking lot and a destination in the embodiment. FIG. 9 is a screen diagram showing a display example showing a display example. FIG. 9 is a screen diagram showing a display example of a travel route to a searched parking lot and a walking route to a destination in the embodiment. FIG. 11 is a data format diagram of a CD-ROM serving as map data storage means in a conventional example. FIG. 12 is a schematic diagram of road data on map data in a conventional example. FIG. 13 is an operation flow diagram of destination setting in a conventional example. FIG. 14 is an operation flowchart of a route search in a conventional example.
101 map data storage means 102 current position calculation means 103 display means 104 operation input means 105 parking lot extraction means 106 route search means 107 control means

Claims (5)

Map data storage means in which road data and parking lot data are recorded; current position calculation means for detecting the current position of the own vehicle; a road map read from the map data storage means; Display means for displaying the current position of the subject vehicle, input means for inputting a destination or destination facility, and input from the input means based on the parking lot data read from the map data storage means. A parking lot presence / absence determining means for determining the presence / absence of a parking lot at the destination or facility, and a parking lot around the inputted destination or facility when the parking lot presence / absence determining means determines that there is no parking lot is input and the parking extracting means for extracting, from the current position when the parking facility of input destination or purpose is determined that the above Parking existence determining means And searching for a route to a destination or purpose of the facility, while the parking whether current when parking the destination or purpose of the facility that is input is determined not by the determining means is located or found on Symbol the route to the parking lot that has been extracted by the parking lot extracting unit searches the route search display these pathways and a route searching means for displaying on the display means. When one of the plurality of parking lots extracted by the parking lot extracting means and displayed on the display means is selected by the input means, a route to the selected parking lot is searched by the route searching means. 2. The route search and display device according to claim 1, wherein said route search and display device displays the information on said display means. If there is no parking lot at the input destination or facility, the route search means searches for a route from the parking lot around the destination or facility extracted by the parking lot extraction means to the destination or facility, and 3. The route search and display device according to claim 2, wherein the route search and display are displayed on display means. 4. The route search and display device according to claim 3, wherein the display of the route to the parking lot displayed on the display means is different from the display of the route from the parking lot to the destination or facility. When there is no parking lot at the input destination or facility, whether or not to search the route from the parking lot around the destination or facility extracted by the parking lot extracting means to the destination or facility by the route searching means The route search and display device according to any one of claims 1 to 4, wherein the instruction is made by input means.

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