JP3769817B2 - Route search display device - Google Patents

Route search display device Download PDF

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Publication number
JP3769817B2
JP3769817B2 JP14252196A JP14252196A JP3769817B2 JP 3769817 B2 JP3769817 B2 JP 3769817B2 JP 14252196 A JP14252196 A JP 14252196A JP 14252196 A JP14252196 A JP 14252196A JP 3769817 B2 JP3769817 B2 JP 3769817B2
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JP
Japan
Prior art keywords
route
search
waypoint
display device
area
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
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JP14252196A
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Japanese (ja)
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JPH09325041A (en
Inventor
浩史 辻
Original Assignee
松下電器産業株式会社
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Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a travel position display device that displays a current position of a car or the like on a display device together with a map, and more 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. 6 shows an outline of a conventional on-vehicle travel position display device.
[0003]
In FIG. 6, reference numeral 1 denotes an azimuth sensor, which uses a geomagnetic sensor that detects the absolute traveling azimuth of the automobile and a vibrating gyroscope that detects the relative traveling azimuth of the automobile. Reference numeral 2 denotes a distance sensor that generates a pulse corresponding to the number of rotations of the wheel. Reference numeral 3 denotes various sensor signals such as an on / off signal for a brake switch and a parking switch, and a power supply voltage monitoring signal. Reference numeral 4 denotes a GPS (Global Positioning System) receiver, which can obtain the position (latitude, longitude) of a reception point by receiving and calculating radio waves transmitted from a plurality of satellites. Reference numeral 5 denotes a CD-ROM drive, which reads map data from a CD-ROM 6 in which map data is stored.
[0004]
Reference numeral 7 denotes a display / operation unit installed in the passenger compartment, and includes a liquid crystal display 7A for displaying a map and the current traveling position and direction of the automobile, and a touch panel 7B provided on the front surface of the liquid crystal display 7A. Includes a switch for instructing the enlargement / reduction of the display map, a switch for instructing a route search, a switch for selecting a destination from among the place names displayed on the liquid crystal display 7A, and an address for inputting the destination. A switch, a switch for moving in a direction for designating a display map, and the like are provided. Reference numeral 8 denotes an apparatus main body, and the apparatus main body 8 is installed in a trunk room or the like.
[0005]
The configuration of the apparatus main body 8 will be described. 9 is a CPU (central processing unit) that performs various calculations, 10 is a ROM (read-only memory) that stores programs for various calculations performed by the CPU 9, 11 is an orientation sensor 1, and a distance. A sensor signal processing unit for processing sensor signals such as the sensor 2, 12 is a memory (DRAM) for storing data from the direction sensor 1, distance sensor 2, GPS receiver 4, CD-ROM drive 5, calculation results in the CPU 9, etc. ), 13 is a backup memory (SRAM) for holding necessary data even when the power supply to the apparatus main body 8 is stopped, and 14 is a memory for patterns such as characters and symbols to be displayed on the liquid crystal display 7A. Memory (kanji, font ROM), 15 forms a display screen based on the map data and the current position data of the vehicle An image processor 16 for combining the map data, current position data and kanji characters generated by the image processor 15, kanji characters such as street names and road names output from the font ROM 14, and fonts, and displaying them on the liquid crystal display 7A. Is an RGB conversion circuit for converting the output data of the VRAM 16 into color signals, and the converted color signals are output from the RGB conversion circuit 25 to the liquid crystal display 7A. Reference numeral 18 denotes a communication interface.
[0006]
FIG. 7 is a diagram showing a format of data stored in the CD-ROM 6. In FIG. 7, 19 is a disk label, 20 is a drawing parameter, 21 is a leaf management information, and 22 is a leaf. Background data, character data, road data, etc. are stored in this leaf 22. Data for each unit map obtained by dividing a national topographic map by latitude and longitude is stored. In the leaf 22, data describing a narrow area in detail from data roughly describing a wide area is set.
[0007]
Each map leaf 22 is composed of map display levels A, B, and C describing the same area. The map display levels A, B, and C are described in more detail than B and B than B. Each map display level 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 an area of each map display level into a plurality of parts, and includes a unit header, a character layer, a background layer, a road layer, an option layer, and the like. The character layer stores place names, road names, facility names, and the like displayed on the map, the background layer stores data for drawing roads, facilities, etc., and the road layer is shown in FIG. As described above, data on coordinate points (nodes) and lines (links) describing roads including intersections, for example, node numbers of nodes, latitudes and longitudes, link link numbers, link distances, and the like are stored. In FIG. 8, circles indicate nodes, and lines between the nodes indicate links. A black circle node indicates an intersection node. Note that the data stored in the road layer is not directly involved in the map display and is used as road network information such as map matching.
[0008]
In FIG. 7, reference numeral 23 denotes route search data, in which search data is recorded for each hierarchy from a hierarchy 0 targeting a narrow area to a hierarchy n targeting a wide area. The search data for each hierarchy is composed of node connection data 24, estimated link transit time (link cost) data 25, and route display data 26.
[0009]
As shown in FIG. 9, the node connection data 24 is data indicating which node each of the nodes a to g, x, and y is connected to. For example, for the node c, the nodes a, d, f, Data indicating connection to y. Further, the link cost data 25 indicates the link cost of the link between the nodes as shown in FIG. 9, for example, the link cost of the link between the node a and the node c is “5”. The link cost between the node a and the node b is “20”. The link cost above is
The link cost is obtained from the link distance / the set speed, and the set speed is set according to the road type and the road width. In the route display data 26, data for displaying the route selected by the route search on the display map is recorded.
[0010]
In the above configuration, the operation will be described below with reference to the flowchart for explaining the map display operation shown in FIG.
[0011]
In FIG. 6, the output of the azimuth sensor 1 and the output of the distance sensor 2 are sent to the CPU 9 via the sensor signal processing unit 4. The CPU 9 calculates the current position of the host vehicle and obtains the latitude and longitude of the current position. Further, the CPU 9 corrects the current position based on data sent from the GPS receiver 4 via the communication interface 18. Based on the current position thus obtained, a map of the unit corresponding to the current position is read from the CD-ROM 6 by the CD-ROM drive 5, and this map data is stored in the memory 12 (DRAM) via the communication interface 18. (Step S51).
[0012]
A part of the map data stored in the DRAM 12 is read by the CPU 9, converted into image data by the image processor 15, and written in the image memory 16 (VRAM) (step S52). At this time, 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.
[0013]
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 7A, where a map of a predetermined range centered on the current position, characters such as place names, and symbols such as schools are displayed. (Step S53). Further, the current position displayed on the liquid crystal display 7A is sequentially changed based on the traveling speed and traveling direction sequentially obtained as the automobile travels.
[0014]
In step S54, the road network data recorded in the road layer is read from the CD-ROM 6, and in step S55, the position and direction of the own vehicle are determined based on the road network data and the current position data calculated by the CPU 9. In S56, the vehicle mark on the map displayed on the liquid crystal display 7A is displayed.
[0015]
Next, the route search operation will be described with reference to the flowchart for explaining the operation shown in FIG. 11 and the operation explanatory diagram shown in FIG.
[0016]
When a route search switch on the touch panel 7B is operated, a route search process is executed. First, as shown in FIG. 11, the destination is set in step S61. In step S62, it is selected whether to set a waypoint. If setting a waypoint is selected in step S62, one or more waypoints are set in step S63. The setting of the destination or waypoint in step S61 or step S63 is performed, for example, by inputting an address or by designating a point on the map displayed on the liquid crystal display 7A. In step S64, it is determined whether or not a route search is started. This determination is made based on whether or not the route search switch on the touch panel 7B of the display / operation unit 7 is operated.
[0017]
If it is determined in step S64 that the route search switch has been operated, the process proceeds to step S65, where a route search is performed. Here, as shown in FIG. 12, the current position is S, the destination is G, and the waypoint Assume that P1,..., Pn are set. At this time, in the route search, first, the current position S is set as the starting point node x and the waypoint P1 is set as the destination node y, and the starting point node (current position node) x is changed to the destination node y as shown in FIG. The link cost of all the routes to be reached is added, and the route with the lowest link cost is selected. In the case shown in FIG. 5, since the total link cost (10 + 5 + 5 + 5 + 5 + 5 = 35) of the link x → a → c → d → f → g → y is the smallest, the link x → a → c → d → f → g → y The route connecting is selected.
[0018]
Next, a route search is performed in the same manner with the route point P1 as the departure point node x and the route point P2 as the destination node y. Thereafter, the route search to the destination G is similarly performed, and finally the route S → 32 → 33 → 34 → 35 → G from the current position S to the destination G is selected as shown in FIG. . In step S66, the route selected in step S65 is displayed, for example, in red on the display map of the liquid crystal display 7A.
[0019]
Next, the route re-search operation will be described with reference to the flowchart for explaining the operation shown in FIG.
[0020]
While traveling on the searched route, it is determined in step S71 whether or not the vehicle position has deviated from the searched route. While traveling on the searched route, step S71 is repeated, but if it is determined that the vehicle position has deviated from the searched route and in step S71, the process proceeds to step S72 and travels a certain distance. It is determined whether or not. If it is determined in step S72 that the vehicle has traveled a certain distance, a route search is performed starting from the current position in step S73. The route search procedure is performed in the same manner as shown in FIGS. In step S74, the route selected in step S73 is displayed on the display map of the liquid crystal display 7A.
[0021]
In this way, in the above conventional example, it is possible to perform route search by setting the departure point, waypoint, and destination, and when the vehicle position deviates from the search route while traveling along the search route, After traveling a certain distance, the route search is performed again with the current position as the starting point by a re-search operation. However, even if an attempt is made to travel to the destination before reaching the transit point, the route to the transit point is continuously searched again unless it is determined that the vehicle has passed the transit point.
[0022]
[Problems to be solved by the invention]
As described above, in the conventional example, the route search operation searches for a route that surely passes through each waypoint, so it passes around the route point and heads for the next route point or destination. Even while traveling, there is a problem that the re-searching operation up to the waypoint is repeated unless the current waypoint is passed.
[0023]
The present invention solves the above-described problem of the conventional example, and when it is desired to go to a destination via a certain area, it does not pass through the intermediate place itself, but passes through the surrounding area to make a next route. The route to the destination can be searched via the ground. Therefore, it is only necessary to enter a rough position when setting the route region, and the convenience and speed of route search can be improved. An object of the present invention is to provide a route search and display device that can perform the above.
[0024]
[Means for Solving the Problems]
In order to achieve the above object, the present invention designates a route point and its range by way of the route region input means, and when it is determined that the vehicle position has passed around the route point during the route guidance, The search means searches for a route from the point to the destination via the next waypoint.
[0025]
Thereby, it is only necessary to input a position of a guideline when setting the route area, and a route search display device that can improve the convenience and speed up of the route search can be obtained.
[0026]
DETAILED DESCRIPTION OF THE INVENTION
This onset Ming, the route and the vehicle position from a first waypoint from the vehicle position in accordance with the number of times performed the route re-search processing via the region including the first waypoint to the first waypoint Is provided with control means for displaying one of the routes to the second waypoint existing next to the display means, and the route search is performed by setting the waypoint and its range during the route search. If it is determined that the vehicle has passed around the stopover point while driving, the route from that point to the destination via the next stop point can be searched without passing through the stop point itself. Have.
[0027]
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(Embodiment 1)
Although the basic configuration in the present embodiment is the same as that in the above-described conventional example, the route search display device is functionally shown in FIG. The hardware configuration of the control means is a CPU, a ROM, etc., as in the conventional example, and the software configuration of the control means will be described below.
[0028]
In FIG. 1, 41 is a vehicle position detecting means for detecting the vehicle position, 42 is a storage means for storing road map data, 43 is a destination input means for inputting a destination, 44 is a waypoint and its range. Via area input means (corresponding to the input means) 45 for inputting , 45 is a destination input means 43 from the own vehicle position detected by the own vehicle position detecting means 41 via the intermediate place inputted by the via area input means 44. Route search means 46 for searching for the route to the input destination, and 46 from the vehicle position when the vehicle position detected by the vehicle position detection means 41 deviates from the search route searched by the route search means 45. Re-search instruction means for instructing the route search means 45 to re-search for the route to the destination, 47 is a waypoint where the vehicle position detected by the vehicle position detection means 41 is inputted by the route area input means 44 Having passed around And determining means 48 for instructing the route searching means 45 to search for a route from the point to the destination. 48 is detected by the road map read from the storage means 42 and the vehicle position detecting means 41. It is a display means for displaying the own vehicle position and the searched route searched by the route searching means 45.
[0029]
In the above configuration, the operation of searching for a route by setting a waypoint and its range (routed region) will be described below with reference to the flowchart shown in FIG.
[0030]
2 is different from the conventional example shown in FIG. 11 in that a waypoint is set or a waypoint is set, and here, the setting of the waypoint will be mainly described.
[0031]
When the destination is set from the destination input means 43 (step S1), it is selected whether or not a via area is set (step S2). When setting the transit area is selected in step S2, one or more transit areas are set from the transit area input unit 44 (steps S3 and S4). The transit area is set by setting the transit area and specifying the range of the transit area. In step S3, a transit point that is a reference point of the transit region is set. This is performed in the same manner as the setting of the waypoint in the conventional example.
[0032]
When a transit point serving as a reference point for the transit region is set in step S3, a range of the transit region is designated based on the reference point in step S4. A method of designating a distance from the reference point and using a circular area centered on the reference point as a transit area or a map including the reference point is displayed on the display means (liquid crystal display 7A) 48, and the circle is displayed on the display screen. The range of the transit area is specified by a method of designating the transit area in an arbitrary shape such as a shape, an ellipse, a rectangle, or the like. The designated transit area should be easily distinguishable by changing the color from the surrounding map. When start of route search is selected (step S5), route search is performed by the route search means 45 (step S6). The route search is performed in the same manner as in the conventional example by using the waypoint which is the reference point of the route area, and the route is displayed on the map displayed on the display means 48 (step S7).
[0033]
Next, an operation of performing a route search and determining that the vehicle position has passed the transit area during traveling will be described with reference to the flowchart shown in FIG.
[0034]
While traveling along the searched route, it is determined by the determination means 47 whether or not the own vehicle position exists in the transit area (step S11). If it is determined in step S11 that the vehicle position is in the transit area, it is determined whether or not the vehicle has traveled a certain distance in the transit area (step S12). If it is determined in step S12 that the vehicle has traveled a certain distance, it is determined whether or not the vehicle position is on the ground (step S13). If it is determined in step S13 that the vehicle position is on the route ground, the passage of the route point is completed and the vehicle position is on the searched route. The destination can be reached via the next waypoint, and this operation ends.
[0035]
If it is determined in step S13 that the vehicle is not on the ground, it is determined whether or not the vehicle position is traveling on the searched route (step S14). If it is determined that the vehicle is traveling on the searched route, the process returns to step S13. If it is determined in step S14 that the vehicle is not traveling on the searched route, the process proceeds to a re-search operation by the re-search instruction unit 46 and the route search unit 45 (steps S15 and S16). First, in step S15, the number of route re-searches is counted. If the number of re-searches is less than or equal to the predetermined set value M, the process proceeds to step S16, and a route re-search operation is performed. The route re-search operation is performed in the same manner as in the conventional example shown in FIG. If the number of re-searches exceeds the set value M, it is determined that the route has passed through the route area, and the route search means 45 searches for a route from the current travel position to the destination via the next route area (step) S17).
[0036]
The meaning that the number of re-searches exceeds the set value M in step S15 means that there is no further intention to approach the waypoint, that is, it can be considered that the route has passed. Therefore, if the set value M is too small, the route search to the next waypoint will be started when the vehicle is still traveling toward the waypoint. On the other hand, if the set value M is too large, the route search to the previous waypoint is still continued even though the vehicle is already traveling toward the next waypoint. Therefore, the set value M needs to be set to an appropriate value according to the range of the transit area.
[0037]
4 and 5 visually illustrate this embodiment. In FIG. 4, the route 31 is set as a reference point for the departure point S, the destination G, and the route regions 27 and 28, and the search route 31 when the route search is performed is indicated by a solid line. A dotted line indicates a travel locus 32 from when it is determined that the vehicle position exists in the transit area 27 until it is determined that the vehicle has passed the transit area 27. A chain line indicates a search route 34 from the point 33 determined to have passed through the transit area 27 to the next transit point 30.
[0038]
FIG. 5 explains the operation in the transit area 27 shown in FIG. 4 in more detail. It is assumed that, after it is determined that the vehicle exists in the transit area 27, the vehicle departs from the search route and travels a certain distance, and the route re-search operation is started at the point 35. It is assumed that the search route 36 from the point 35 to the waypoint 29 is searched by the route re-search. Furthermore, it is assumed that the vehicle travels off the route and the route 38 is searched again by the route re-searching operation at the point 37. At this stage, since it is not yet determined that the route area has been passed, the route toward the route point 29 is searched again. In this way, when the number of re-searches after entering the transit area when the point 33 is reached, the point 33 is determined to be a passing point of the transit area 27. Then, using the passing point 33 as a starting point, a route toward the waypoint 30 which is the reference point of the next waypoint is searched.
[0039]
As described above, according to the present embodiment, when there is an area that the user wants to pass when traveling from the starting point to the destination, the route search can be performed by inputting the area as the transit area. Even if it does not pass through the transit point itself, if it is determined that it has passed through the transit region, a route search to the next transit point can be automatically performed. Therefore, it is not necessary to input the location of the transit location so accurately when setting the transit region, and it is only necessary to input a location of a guide level.
[0040]
【The invention's effect】
As described above, according to the present invention, when it is desired to go to a destination via a certain area, by setting the waypoint and its range, the surrounding area can be obtained without passing through the waypoint itself. By passing, the route to the destination is searched via the next waypoint, so that it is possible to improve the convenience and speed up of the route search.
[Brief description of the drawings]
FIG. 1 is a functional block diagram showing a route search display device according to an embodiment of the present invention. FIG. 2 is a flowchart for explaining a route search operation in the route search display device. FIG. 4 is an explanatory diagram of a route search operation in the route search display device. FIG. 5 is an explanatory diagram of a route passage determination operation in the route search display device. FIG. 7 is a block diagram showing a position display device. FIG. 7 is a diagram showing a CD-ROM format of the traveling position display device. FIG. 8 is a diagram showing road data stored in the CD-ROM of the traveling position display device. FIG. 10 is a flowchart for explaining the map display operation in the travel position display device. FIG. 11 is a flowchart for explaining the route search operation in the travel position display device. Flow diagram illustrating the route searching operation in FIG. 12 the running position display device 13 is a flow diagram of a route re-search operation for the description in the running position display device DESCRIPTION OF REFERENCE NUMERALS
41 vehicle position detection means 42 storage means 43 destination input means 44 route area input means 45 route search means 46 re-search instruction means 47 determination means 48 display means

Claims (4)

  1. The route from the vehicle position to the first waypoint and the position following the first route point from the own vehicle position according to the number of route re-search processes performed in the route area including the first place. A route search and display device comprising control means for causing a display means to display one of routes to a second waypoint .
  2. If the number of times of the route re-search process is equal to or greater than a predetermined number, the control means displays a route from the vehicle position to a second waypoint that exists next to the first waypoint, The route search display device according to claim 1, wherein if the number of times of the route re-search process is smaller than a predetermined number of times, a route from the vehicle position to the first waypoint is displayed.
  3. The route search and display device according to claim 1, wherein the control unit displays a route area and another area in different colors.
  4. Route search display device according to any one of claims 1 to 3, characterized in that it comprises an input means for inputting to the control means data indicative of the via area in accordance with the User chromatography THE operation.
JP14252196A 1996-06-05 1996-06-05 Route search display device Expired - Fee Related JP3769817B2 (en)

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Application Number Priority Date Filing Date Title
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Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
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JP3769817B2 true JP3769817B2 (en) 2006-04-26

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Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19928295A1 (en) * 1999-06-22 2000-12-28 Bosch Gmbh Robert Determining route from initial position to destination involves storing route borders optimised with route search algorithm in route table, specifying intermediate destination(s)
DE10036817A1 (en) 2000-07-28 2002-02-14 Bosch Gmbh Robert Route calculation method
JP3514253B2 (en) 2001-11-30 2004-03-31 株式会社デンソー Car navigation system
JP4635833B2 (en) 2005-11-09 2011-02-23 株式会社デンソー Car navigation system
JP5001565B2 (en) * 2006-03-23 2012-08-15 株式会社デンソー Navigation device
JP2011122821A (en) * 2008-04-02 2011-06-23 Mitsubishi Electric Corp Navigation device
DE112009000647T5 (en) 2008-04-02 2011-02-10 Mitsubishi Electric Corp. Navigation device
JP4737235B2 (en) * 2008-06-09 2011-07-27 アイシン・エィ・ダブリュ株式会社 Car navigation system and navigation method
JP5208805B2 (en) * 2009-02-26 2013-06-12 株式会社ナビタイムジャパン Navigation system, terminal device, navigation server, navigation device, and navigation method

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