JP4114523B2 - Navigation system and route guidance method program - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a navigation system and a route guidance method program.
[0002]
[Prior art]
Conventionally, in a navigation device, for example, a current position of a vehicle, that is, a current position, is detected by GPS (Global Positioning System), and a rotation angular velocity of a vehicle detected by a gyro sensor, that is, based on a turning angle, The direction of the vehicle, that is, the vehicle direction is detected, map data is read from the data recording unit, a map screen is formed on the display unit, and the current location, a map around the current location, and the vehicle direction are displayed on the map screen. It is displayed. Therefore, the driver who is an operator can drive the vehicle according to the current location displayed on the map screen, the map around the current location, and the direction of the vehicle.
[0003]
Further, when the driver inputs a destination and sets search conditions, a route from the departure point to the destination represented by the current location is searched based on the search conditions. The searched route, that is, the searched route is displayed together with the current location and the destination on the searched route display screen formed on the display unit. Therefore, the driver can drive the vehicle according to the displayed search route. When the driver inputs a departure point different from the current location, a route from the input departure point to the destination is searched.
[0004]
By the way, when the vehicle is traveling, if there is an intersection that is to be passed next within a predetermined distance from the vehicle position represented by the current location, the area around the intersection is in a predetermined area of the map screen. An enlarged view of the road, that is, an enlarged view of the intersection is displayed superimposed on the original map, and the name of the intersection, the main facilities adjacent to the intersection, the main place name ahead of the intersection, etc. are displayed on the enlarged view of the intersection (For example, refer to Patent Document 1).
[0005]
[Patent Document 1]
JP-A-6-348996
[0006]
[Problems to be solved by the invention]
However, in the conventional navigation device, when intersections continue on the route on which the vehicle is traveling, it is difficult to recognize which intersection is the intersection shown in the enlarged intersection diagram.
[0007]
It is an object of the present invention to provide a navigation system and a route guidance method program capable of resolving the problems of the conventional navigation device and surely recognizing an enlarged intersection view.
[0008]
[Means for Solving the Problems]
For this purpose, in the navigation system of the present invention, navigation information acquisition processing means for acquiring navigation information, display processing means for displaying a map on a display unit based on the navigation information, and driving the vehicle along a predetermined route When the vehicle approaches a predetermined intersection, an enlarged view of the intersection is superimposed on the original map so that the intersection matches the position of the intersection on the original map. And an intersection enlarged map display processing means for displaying a mark representing the position only on the enlarged intersection map.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0020]
FIG. 1 is a diagram showing a navigation system according to the first embodiment of the present invention.
[0021]
In the figure, reference numeral 14 denotes an information terminal, for example, a navigation device as an in-vehicle device mounted on a vehicle. The navigation device 14 includes a GPS sensor 15 as a current location detection unit for detecting the current location, map data, road data, It functions as a computer based on basic information of the navigation device 14 such as search data, that is, a data recording unit 16 as an information recording unit in which various information is recorded in addition to navigation information, various programs, data, and the like. Based on the input information, the navigation processing unit 17 that performs various arithmetic processing such as navigation processing, the direction sensor 18 as the direction detection unit that detects the vehicle direction, and the driver who is the operator operate The operation unit 34 as a first input unit for performing a predetermined input is displayed on a screen (not shown). Various displays by images, a display unit 35 as a first output unit for notifying the driver, a voice input unit 36 as a second input unit for performing predetermined input by voice, and various by voice Is provided with a voice output unit 37 as a second output unit for notifying the driver, and a communication unit 38 as a transmission / reception unit functioning as a communication terminal. A display unit 35, an audio input unit 36, an audio output unit 37, and a communication unit 38 are connected. The navigation processor 17 is also connected with a vehicle speed sensor 41 as a vehicle speed detector.
[0022]
The GPS sensor 15 detects the current location on the earth by receiving radio waves generated by an artificial satellite, and also detects the time.
[0023]
Note that a distance sensor, a steering sensor, an altimeter, or the like (not shown) can be used alone or in combination as the current location detection unit instead of the GPS sensor 15. The distance sensor detects a distance between predetermined points on the road, and calculates a distance based on a rotational speed of a wheel (not shown) or by integrating acceleration twice. The steering sensor detects a rudder angle, for example, an optical rotation sensor attached to a rotating part of a steering wheel (not shown), a rotation resistance sensor, an angle sensor attached to a wheel, etc. Can be used.
[0024]
Further, a gyro sensor, a geomagnetic sensor, or the like can be used as the direction sensor 18. As the gyro sensor, for example, a gas rate gyro, a vibration gyro, or the like is used, and the vehicle direction is detected by integrating the turning angle. The geomagnetic sensor detects the direction of the vehicle by measuring the geomagnetism.
[0025]
The data recording unit 16 includes a database including data files such as a map data file, an intersection data file, a node data file, a road data file, a search data file, and a facility information data file. Each data file includes a display unit. Data for outputting various images is recorded in 35. The data recording unit 16 also records data for outputting predetermined information by the audio output unit 37.
[0026]
For example, the map data file contains map data for displaying a map, the intersection data file contains intersection data related to each intersection, the node data file contains node data related to node points, and the road data file contains road data related to roads. The search data file stores search data for searching for a route, and the facility information data file stores facility information data related to various facilities. The intersection data, node data, road data, search data, etc. Road condition data representing the road condition is constructed.
[0027]
The intersection data includes data representing the name of the intersection, the shape of the road at the intersection, the main facilities adjacent to the intersection, the name of the main place ahead of the intersection, and the like. In addition, the node data includes data representing an actual road branch point (including an intersection, a T-junction, and the like), a node point, a link between node points that connect the node points, and the like.
[0028]
The road data includes the width, slope, cant, bank, road surface condition, number of road lanes, places where the number of lanes decreases, places where the width becomes narrow, etc. , Radius of curvature, intersections, T-shaped roads, corner entrances, road attributes, downhill roads, uphill roads, etc., road types, national roads, prefectural roads, narrow streets, highways, urban highways Data representing expressways and toll roads such as roads and toll roads are included. Further, the road data includes data indicating level crossings, highway entrance and exit roads (rampways), highway / toll road tollgates, and the like. The facility information data includes data representing facility information such as an address, a telephone number, and facility information in addition to the names of facilities such as hotels, gas stations, parking lots, sightseeing spots, and department stores in each region. .
[0029]
The navigation processing unit 17 includes an arithmetic device that controls the entire navigation device 14 and a CPU 31 as a control device, and a DRAM as a first recording medium used as a working memory when the CPU 31 performs various arithmetic processes. In addition to the RAM 32 such as SRAM, MRAM, and FeRAM, a control program, a ROM 33 as a second recording medium on which various programs for searching a route to the destination, route guidance, and the like are recorded, A flash memory (not shown) is provided as a third recording medium used for recording data, programs, and the like. A semiconductor memory, a magnetic core or the like is used as an internal storage device such as the RAM 32, ROM 33, flash memory or the like.
[0030]
An MPU or the like can be used instead of the CPU 31 as the arithmetic device and the control device.
[0031]
The data recording unit 16 includes a magnetic disk (not shown) such as a hard disk or a flexible disk as a fourth recording medium arranged as an external storage device for recording the various data. A head (not shown) such as a read / write head for reading or writing the data is provided. Similarly, the data recording unit 16 includes a magnetic tape, a magnetic drum, a CD, an MD, a DVD, an optical disk, an MO, an IC card, an optical card, and the like as a fifth recording medium disposed as an external storage device. You can also
[0032]
By the way, various programs can be recorded in the ROM 33 and various data can be recorded in the data recording unit 16, but the programs, data, and the like can also be recorded on a hard disk or the like. In this case, the program, data, etc. can be read from a hard disk or the like and written to the flash memory. Therefore, the program, data, etc. can be updated by exchanging the hard disk or the like. Further, when an automatic transmission control device is mounted to control an automatic transmission (not shown) mounted on the vehicle, the control program, data, etc. for the automatic transmission control device are also stored in the hard disk or the like. Can be recorded. Further, the program, data, etc. can be received via the communication unit 38 and written to the flash memory.
[0033]
The operation unit 34 is operated by the driver to correct the current location at the start of traveling, to input a departure point and a destination, to input a passing point, and to activate the communication unit 38. A keyboard, a mouse, a barcode reader, a light pen, a remote control device for remote control, a joystick, etc., which are arranged independently of the display unit 35, can be used. Further, as the operation unit 34, a predetermined input operation is performed by touching or clicking an image operation unit such as various keys, switches, and buttons displayed as images on the screen formed in the display unit 35. Can do.
[0034]
As the display unit 35, a display such as a CRT display, a liquid crystal display, or a plasma display can be used, or a hologram device that projects a hologram on a windshield of a vehicle can be used. The current location, map, search route, guidance information along the search route, traffic information, etc. are displayed on various screens formed on the display unit 35, and characteristic photographs and frame diagrams at the intersection or the search route are displayed. In addition to displaying the distance to the next intersection and the direction of travel at the next intersection, etc., operation guidance for the image operation unit, operation unit 34, voice input unit 36, etc., operation menu, key guidance, etc. Or FM multiplex broadcast programs or the like can be displayed.
[0035]
The voice input unit 36 includes a microphone (not shown) and the like, and can input necessary information by voice. Further, the voice output unit 37 includes a voice synthesizer and a speaker (not shown), and the search route, guidance information, traffic information, and the like are output from the voice output unit 37, for example, as voice synthesized by the voice synthesizer. . In addition to the voice synthesized by the voice synthesizer, various sounds, various guidance information recorded in advance on a tape, a memory, and the like can be output.
[0036]
The communication unit 38 is arranged along the road with various types of information transmitted from a road traffic information center such as a VICS (registered trademark: Vehicle Information and Communication System) center as a first information provider. A beacon receiver for receiving a radio wave beacon, an optical beacon, etc. via a radio beacon device, an optical beacon device, etc., an FM receiver for receiving FM multiplex broadcast via an FM broadcast station, and the like are provided. And, the beacon receiver receives traffic information such as traffic jam information, regulation information, parking lot information, traffic accident information, service area congestion status information, etc. In addition to the traffic information, news, General information such as weather forecasts can be received as FM multiplexed information. The beacon receiver and the FM receiver are unitized and arranged as a VICS receiver, but can be arranged separately.
[0037]
The communication unit 38 can also receive various data such as D-GPS information for detecting a detection error of the GPS sensor 15 transmitted from a predetermined base station. Further, the communication unit 38 can receive position information by radio wave beacons, optical beacons, and the like to detect the current location. In this case, the beacon receiver functions as a current location detection unit.
[0038]
Furthermore, the communication part 38 can also receive various information such as traffic information and general information from the information center 51 as the second information provider. For this purpose, the communication unit 38 and the information center 51 are connected via a network 43.
[0039]
The navigation device 14, the information center 51, the network 43, etc. constitute a navigation system, and various types of information are transmitted and received between the communication unit 38 and a communication unit (not shown) of the information center 51.
[0040]
In the present embodiment, in order for the communication unit 38 to function as a communication terminal, a communication device such as a mobile phone is built in the communication unit 38 as a module. It is also possible to connect devices and connect the communication device and the communication unit 38. In that case, as a communication device, a mobile phone such as a mobile phone, a car phone, or a PHS, a wireless LAN card, or the like is used, a personal computer, a portable computer, a personal digital assistant (PDA), an electronic notebook, or a video phone. A game machine or the like having a communication function can be used.
[0041]
The network 43 includes a LAN (Local Area Network), a WAN (Wide Area Network), an intranet, a mobile phone network, a telephone network, a public communication network, a dedicated communication network, a communication network such as the Internet, etc. Communication means can be used. Communication means using CS broadcasting, BS broadcasting, terrestrial digital television broadcasting, FM multiplex broadcasting, etc. by a broadcasting satellite can also be used. Furthermore, it is possible to use communication means such as a non-stop automatic toll payment system (ETC) and a boundary communication system (DSRC) that are used in an intelligent road traffic system (ITS).
[0042]
The information center 51 may be operated by any one of an individual, a company, an organization, a local government, a government-related organization, or the like, and may be operated by the VICS (registered trademark) center.
[0043]
The information center 51 includes a server 53, a database (DB) 57 serving as an information recording unit connected to the server 53, the communication unit, and the like. Two-way communication is performed, and traffic information, general information, and the like are provided. For this purpose, the server 53 includes a CPU 54, a RAM 55, a ROM 56, and the like as an arithmetic device and a control device, and functions as a computer based on predetermined programs, data, and the like. Further, the same data as various data (including navigation information) recorded in the data recording unit 16 can be recorded in the database 57. The server 53 and the navigation processing unit 17 can also constitute a computer. Further, an MPU or the like can be used instead of the CPU 54.
[0044]
Then, the CPU 54 receives traffic information, general information, etc. transmitted from the VICS (registered trademark) center, etc., and records it in the database 57 as primary information, or processes the primary information to perform statistical processing, Statistical data constituting history information indicating the history of the traffic jam status, traffic jam prediction information for predicting the traffic jam status, and the like are created, and the statistical data is recorded in the database 57 as secondary information. In the present embodiment, in creating the statistical data, the history information includes detailed conditions such as date and time, day of the week, weather, various events, seasons, facility information (whether a large facility such as a department store or a supermarket). Added.
[0045]
Next, a basic operation of the navigation system having the above configuration will be described.
[0046]
First, when the operation unit 34 is operated by the driver and the navigation device 14 is activated, a navigation initialization processing unit (not shown) of the CPU 31 performs navigation initialization processing, and the current location and direction detected by the GPS sensor 15. While reading the direction of the vehicle detected by the sensor 18, various data are initialized. Note that the matching processing means (not shown) of the CPU 31 performs matching processing, and the current location is on any road link based on the trajectory of the read current location and the shape and arrangement of each road link constituting the surrounding road. The current location is specified by determining whether the current location is located.
[0047]
Subsequently, an information acquisition processing unit (not shown) of the CPU 31 performs an information acquisition process and acquires the navigation information by reading it from the data recording unit 16 or by receiving it from the information center 51 via the communication unit 38. To do. When acquiring from the information center 51, the information acquisition processing means downloads the received navigation information to a flash memory, a hard disk or the like. In addition, when the navigation information is acquired via the communication unit 38, the program can also be acquired.
[0048]
A display processing means (not shown) of the CPU 31 performs display processing, forms a map screen on the display unit 35, and displays the current location, a map around the current location, and the vehicle direction on the map screen. Accordingly, the driver can drive the vehicle according to the current location, the map around the current location, and the direction of the vehicle.
[0049]
Next, the operation of the navigation system when the navigation device 14 or the navigation system is used for searching for a route will be described.
[0050]
FIG. 2 is a main flowchart showing the operation of the navigation system according to the first embodiment of the present invention.
[0051]
When the driver inputs a destination by operating the operation unit 34 (FIG. 1), a destination setting processing unit (not shown) of the CPU 31 performs a destination setting process to set the destination. Note that the departure place can be input and set as necessary. Moreover, a predetermined point can be registered in advance, and the registered point can be input as a destination.
[0052]
Then, when the destination is set, the route search processing means (not shown) of the CPU 31 performs route search processing, reads the current location, destination, etc., and also reads the search data, etc. from the data recording unit 16, and presents the current location, destination. Based on the location and the search data, a route from the starting point represented by the current location to the destination is searched, and route data representing the searched route is output.
[0053]
Subsequently, a guidance processing means (not shown) of the CPU 31 performs guidance processing and guides the driver on the searched route, that is, route guidance. For this purpose, the route display processing means of the guidance processing means performs route display processing, reads the route data, and displays the searched route on the map screen according to the route data.
[0054]
If necessary, the voice output processing means of the guidance processing means performs voice output processing and outputs a search route by voice from the voice output unit 37 to perform route guidance.
[0055]
Incidentally, route search processing can be performed in the information center 51. In that case, the CPU 31 transmits the current location, the destination, and the like to the information center 51. When the information center 51 receives the current location and destination, the route search processing means (not shown) of the CPU 54 performs the same route search processing, reads the search data from the database 57, and based on the current location, destination and search data. Thus, a route from the departure point represented by the present location to the destination is searched, and route data representing the searched route is output. Subsequently, a transmission processing unit (not shown) of the CPU 54 performs transmission processing and transmits the route data to the navigation device 14. Therefore, in the navigation device 14, when the information acquisition processing means receives the route data from the information center 51, the guidance processing means performs route guidance as described above.
[0056]
In this way, route guidance is performed, and the driver can drive the vehicle according to the searched route.
[0057]
The navigation device 14 can receive traffic information, general information, and the like via the communication unit 38. For this purpose, the additional information acquisition processing means of the information acquisition processing means performs additional information acquisition processing, and receives and acquires the traffic information, general information, and the like as additional information. Therefore, the route display processing means displays additional information on the map screen.
[0058]
The traffic information specifies information type data indicating the type of information, secondary mesh X and Y data for specifying a secondary mesh as a mesh, and a road link connecting two points (for example, intersections). And link number data representing the uplink / downlink and link information representing the content of information provided corresponding to the link number data. The link information includes, for example, a traffic jam from the start point of the road link. Consists of traffic jam head data representing the distance to the head, traffic jam degree data representing the degree of traffic jam, traffic jam length data representing the traffic jam section from the head of the traffic jam to the tail of the traffic jam, and the like.
[0059]
Therefore, the route display processing means converts each link information in the traffic information into, for example, a congestion arrow as a traffic condition index indicating a traffic congestion index indicating whether the traffic is congested or not. The congestion arrow is displayed along the road on the map screen. In this case, the color of the road, the traffic jam arrow, etc. is changed to red, orange, etc. according to the degree of traffic jam.
[0060]
In this manner, the driver can know the traffic jam situation on the route on which the vehicle is to travel, the searched route, and the like.
[0061]
By the way, when the route guidance by the guidance processing unit is started and the vehicle is traveling along a predetermined route, if the vehicle position represented by the current location approaches the next intersection to be passed, the intersection is expanded. A figure is displayed.
[0062]
For this purpose, the intersection determination processing means of the guidance processing means performs an intersection determination process, and when the vehicle is traveling along a predetermined route, a predetermined distance (for example, 300 [m]) from the own vehicle position. If there is an intersection that passes next, if there is an intersection that passes next, the intersection enlarged map display processing means of the guidance processing means performs an intersection enlarged map display process, and the intersection for the intersection Display an enlarged view. In the present embodiment, the intersection determination processing means next moves the vehicle to the right within a predetermined distance (for example, 300 [m]) from the vehicle position when the vehicle is traveling along the searched route. It is determined whether there is an intersection that turns left or branches, that is, whether there is a guidance intersection. If there is a guidance intersection, the intersection enlarged view display processing means displays an enlarged intersection view of the guidance intersection.
[0063]
Next, a flowchart will be described.
Step S1: A destination is set.
Step S2: Route search processing is performed.
Step S3: Route guidance is started.
Step S4: It is determined whether there is a guidance intersection within a predetermined distance from the vehicle position. If there is a guidance intersection within a predetermined distance from the vehicle position, the process proceeds to step S5, and if not, the process ends.
Step S5 An intersection enlarged view display process is performed, and the process ends.
[0064]
Next, the operation of the enlarged intersection map display process in step S5 will be described.
[0065]
FIG. 3 is a diagram showing a subroutine of an enlarged intersection display process according to the first embodiment of the present invention, FIG. 4 is a diagram showing an example of a map screen according to the first embodiment of the present invention, and FIG. The figure which shows the example of the intersection enlarged view in 1st Embodiment of this, FIG. 6 is the figure which shows the 1st example of the intersection enlarged view display screen in the 1st Embodiment of this invention, FIG. 7 is FIG. It is a figure which shows the 2nd example of the intersection enlarged view display screen in 1st Embodiment.
[0066]
When the route guidance is started, a map screen as shown in FIG. 4 is formed on the display unit 35 (FIG. 1), and a predetermined route on the map screen is displayed as the searched route Rt1. In addition, the map screen shows an orientation in the area AR1, a place name in the area AR2, a time in the area AR3, and a distance scale corresponding to the scale of the map screen in the area AR4. Then, a mark Pr representing the vehicle position and the vehicle direction is displayed at a predetermined location on the search route Rt1.
[0067]
The intersection enlarged map creation processing means of the intersection enlarged map display processing means performs the intersection enlarged map creation processing, reads the intersection data about the guidance intersection from the data recording unit 16, and applies a predetermined transparent drawing method according to the intersection data. Based on this, an enlarged view of the intersection as shown in FIG. In the transparent drawing method, the intersection enlarged view creation processing means masks image data in which null data is uniformly distributed corresponding to the transparency to the basic image data constituting the enlarged intersection view. The image data that is transmitted with the transparency is created.
[0068]
In addition to the search route Rt1 being displayed in the enlarged view of the intersection, the mark Pr indicating the vehicle position and the vehicle direction on the search route Rt1, the mark m1 indicating the guidance intersection on the search route Rt1, the lane of the guidance intersection A mark m2 indicating display, marks m3 and m4 indicating main facilities adjacent to the guidance intersection, and the like are displayed. In addition, the name of a guidance intersection can be displayed on an enlarged intersection view as needed.
[0069]
Subsequently, the image processing means of the intersection enlarged view display processing means performs image processing, and calculates a scale so that the enlarged intersection view can be displayed in the intersection enlarged view display area having a preset size. The intersection enlarged view is reduced or enlarged at a scale based on the scale based on a predetermined drawing method. In the drawing method, the image processing unit creates image data by thinning out predetermined pixels or complementing the pixels. The intersection enlarged map display area is set so that a map around the guidance intersection and a mark Pr before the guidance intersection by a predetermined distance (for example, 300 [m]) can be displayed.
[0070]
Subsequently, the overlap display processing means of the intersection enlarged view display processing means performs overlap display processing to form an intersection enlarged view display screen on the display unit 35 as shown in FIGS. 6 and 7, and the intersection enlarged view. On the display screen, the intersection enlarged view dr1 after the image processing is performed on the guidance intersection on the original map is displayed in an overlapping manner. In FIG. 6, the original map and the enlarged intersection map dr1 are displayed so that the traveling direction of the vehicle is on the map screen, and in FIG. 7, the north direction is on the map screen.
[0071]
In this case, the center of the guidance intersection of the original map and the center of the guidance intersection of the enlarged intersection map dr1 are matched, and the enlarged intersection map dr1 is superimposed on the guidance intersection on the original map. For this purpose, the overlapping display processing means calculates drawing coordinates representing the center of the guidance intersection on the original map and drawing coordinates representing the center of the guidance intersection on the enlarged intersection map dr1, and the two drawing coordinates match. Thus, the drawing coordinate system of the intersection enlarged view dr1 is changed to the drawing coordinate system of the original map.
[0072]
Note that it is not always necessary to match the center of the guide intersection of the original map and the center of the guide intersection of the enlarged intersection map dr1, and the driver makes an intersection corresponding to the guide intersection of the original map. What is necessary is just to make it substantially correspond in the range which can recognize the guidance intersection of enlarged view dr1.
[0073]
Subsequently, the overlapping display processing means reads out the coordinates of the vehicle position and the coordinates representing the center of the guidance intersection, and determines whether or not the vehicle position has passed the guidance intersection. When the vehicle position passes the guidance intersection, the overlap display processing unit deletes the intersection enlarged view dr1. Further, when the vehicle position does not pass through the guidance intersection, the mark Pr is moved toward the guidance intersection in correspondence with the vehicle position in the enlarged enlarged view dr1.
[0074]
In this way, on the searched route, the enlarged intersection map dr1 is displayed so as to overlap with the guidance intersection on the original map. Therefore, even if the intersections are continuous, which intersection is the guidance intersection shown in the enlarged intersection map dr1. Can be surely recognized. In addition, it is possible to reliably recognize at which intersection to turn right or left.
[0075]
Moreover, since the intersection enlarged view dr1 is transmitted with a predetermined transparency, the original map is not hidden under the intersection enlarged view dr1. Therefore, since the driver can see not only the enlarged intersection map dr1 but also the original map, the driver can fully recognize the shape of the road ahead of the guidance intersection. That is, since it is known what the road ahead of the right and left turns is, the driver can pass the guidance intersection without feeling uneasy.
[0076]
And since the dimension of the intersection enlarged view display area is set in advance, even when the display area of the display unit 35 is small, a sufficiently enlarged intersection enlarged view dr1 can be displayed. Therefore, it is possible to reliably acquire information about the guidance intersection.
[0077]
In the present embodiment, the intersection enlarged view dr1 is displayed when a predetermined distance (for example, 300 [m]) is ahead of the guidance intersection, but is shown in the intersection enlarged view dr1. Since it is possible to reliably recognize which intersection the guide intersection is, the distance can be shortened.
[0078]
Next, a flowchart will be described.
Step S5-1: An enlarged intersection map is created with a predetermined transparency.
Step S5-2: A scale is calculated so that it can be displayed in the enlarged intersection display area.
Step S5-3 The intersection enlarged view dr1 is displayed so as to overlap the guide intersection on the original map.
Step S5-4: It is determined whether or not the vehicle position has passed the guidance intersection. If the vehicle position has passed the guidance intersection, the process proceeds to step S5-5, and if not, the process returns to step S5-3.
Step S5-5 Deletes the enlarged intersection and returns.
[0079]
Next, a description will be given of a second embodiment of the present invention in which the ratio occupied by the intersection enlarged view dr1 on the intersection enlarged view display screen can be made constant. In addition, about the thing which has the same structure as 1st Embodiment, the description is abbreviate | omitted by providing the same code | symbol, and the effect of the same embodiment is used about the effect of the invention by having the same structure. .
[0080]
FIG. 8 is a diagram showing a subroutine for enlarged intersection display processing according to the second embodiment of the present invention, and FIG. 9 is a diagram showing an example of an enlarged intersection display screen according to the second embodiment of the present invention. In addition, about operation | movement of a navigation system, description is abbreviate | omitted using FIG.
[0081]
In this case, when the intersection enlarged view creation processing means of the intersection enlarged view display processing means creates an intersection enlarged view that is transmitted with a predetermined transparency, the image processing means of the intersection enlarged view display processing means performs image processing. The intersection enlarged map display area is calculated and set so that the enlarged intersection map can be displayed on a preset scale. The image processing means reduces or enlarges the intersection enlarged view at a scale based on the scale based on a predetermined drawing method.
[0082]
Subsequently, the overlap display processing means of the intersection enlarged view display processing means performs an overlap display process to form an enlarged intersection display screen on the display unit 35 (FIG. 1), as shown in FIG. On the enlarged map display screen, the enlarged intersection map dr2 is displayed superimposed on the guidance intersection on the original map.
[0083]
In the present embodiment, the intersection enlarged view dr2 can be displayed on a preset scale, so that the area of the intersection enlarged view dr2 can be changed corresponding to the display area of the display unit 35. Accordingly, the portion other than the enlarged intersection map dr2 can be surely secured and the original map can be clearly seen, so that the shape of the road ahead of the guidance intersection can be more fully recognized.
[0084]
Next, the flowchart of FIG. 8 will be described.
Step S5-11: An enlarged intersection map is created with a predetermined transparency.
Step S5-12: An intersection enlarged map display area is calculated so that an enlarged intersection map can be displayed on a preset scale.
Step S5-13 The intersection enlarged view dr2 is displayed so as to overlap the guide intersection on the original map.
Step S5-14: It is determined whether or not the vehicle position has passed the guidance intersection. If the vehicle position has passed the guidance intersection, the process proceeds to step S5-15, and if not, the process returns to step S5-13.
Step S5-15: The intersection enlarged view dr2 is deleted, and the process returns.
[0085]
Next, a description will be given of a third embodiment of the present invention in which a branch point among the intersections is displayed as a guidance intersection in an enlarged view of the intersection. In addition, about the thing which has the same structure as 1st Embodiment, the description is abbreviate | omitted by providing the same code | symbol, and the effect of the same embodiment is used about the effect of the invention by having the same structure. .
[0086]
FIG. 10 is a diagram showing an example of an enlarged intersection display screen according to the third embodiment of the present invention.
[0087]
In this case, the branch point P1 is displayed on the enlarged intersection map dr3, and the search route Rt1 at the branch point P1 is displayed.
[0088]
In the first and second embodiments, the mark Pr indicating the vehicle position is displayed on at least the enlarged intersections dr1 and dr2 of the original map and the enlarged intersections dr1 and dr2. The mark Pr is displayed only in the enlarged intersection map dr1 in the first embodiment, and is displayed in both the original map and the enlarged intersection map dr2 in the second embodiment.
[0089]
In the first and second embodiments, the enlarged intersections dr1 and dr2 are made stationary with respect to the original map and the mark Pr is moved. The enlarged intersections dr1 and dr2 are moved toward the guidance intersection in conjunction with the mark Pr. When the vehicle position reaches the guidance intersection, the center of the guidance intersection of the original map and the enlarged intersections dr1 and dr2 It is also possible to match the center of the guidance intersection and to place the mark Pr on the guidance intersections in the enlarged intersections dr1 and dr2.
[0090]
Furthermore, in the first and second embodiments, each of the intersection enlarged views dr1 and dr2 can be a stereoscopic (3D) image. In the first and second embodiments, one guidance intersection is displayed in the enlarged intersections dr1 and dr2, but in the case of a rotary or the like, a plurality of intersections are displayed as guidance intersections. You can also
[0091]
In addition, this invention is not limited to the said embodiment, It can change variously based on the meaning of this invention, and does not exclude them from the scope of the present invention.
[0092]
【The invention's effect】
As described above in detail, according to the present invention, when approaching a predetermined intersection, an enlarged view of the intersection is placed on the original map so that the intersection matches the position of the intersection on the original map. In addition to being displayed in a superimposed manner, the vehicle position mark can be displayed only on the enlarged intersection map, so even if there are consecutive intersections, you can be sure which intersection is shown in the enlarged intersection map. Can be recognized.
[Brief description of the drawings]
FIG. 1 is a diagram showing a navigation system according to a first embodiment of the present invention.
FIG. 2 is a main flowchart showing an operation of the navigation system according to the first embodiment of the present invention.
FIG. 3 is a diagram illustrating a subroutine of an enlarged intersection map display process according to the first embodiment of the present invention.
FIG. 4 is a diagram showing an example of a map screen in the first embodiment of the present invention.
FIG. 5 is a diagram showing an example of an enlarged intersection view in the first embodiment of the present invention.
FIG. 6 is a diagram illustrating a first example of an intersection enlarged view display screen according to the first embodiment of the present invention.
FIG. 7 is a diagram showing a second example of the intersection enlarged view display screen according to the first embodiment of the present invention.
FIG. 8 is a diagram illustrating a subroutine of an enlarged intersection map display process according to the second embodiment of the present invention.
FIG. 9 is a diagram showing an example of an intersection enlarged view display screen in the second embodiment of the present invention.
FIG. 10 is a diagram showing an example of an intersection enlarged view display screen in the third embodiment of the present invention.
[Explanation of symbols]
14 Navigation device
31, 54 CPU
35 Display section
43 Network
51 Information Center
dr1, dr2, dr3 Intersection enlarged view
Pr mark

Claims (5)

Navigation information acquisition processing means for acquiring navigation information, display processing means for displaying a map on the display unit based on the navigation information, and approaching a predetermined intersection when the vehicle is traveling along a predetermined route If, for the intersection, and displays superimposed on the original map enlarged intersection to match the intersection position of the intersection on the original map, a mark indicating the vehicle position on the diagram intersection enlarged by A navigation system comprising: an enlarged intersection display display processing means for displaying.   The navigation system according to claim 1, further comprising route search processing means for searching a route from a departure point to a destination as a search route, wherein the intersection is a guide intersection on the search route. The navigation system according to claim 1 or 2, wherein the intersection enlarged view display processing means displays the enlarged intersection view with a predetermined transparency . Before SL enlarged intersection display processing unit navigation system according to claim 1 or 2 performs image processing to be able to display the enlarged intersection to intersection enlarged view display area of preset sizes. The computer, navigation information acquisition processing means for acquiring the navigation information, display processing means for displaying a map on the display unit based on the navigation information, and when it is caused to travel along the vehicle in the predetermined path, the predetermined approaches the intersection, with the said intersection, displays superimposed the enlarged intersection to match the intersection on the original map to the position of the intersection on the original map, intersection enlarged marks representing the vehicle position A route guidance method program that functions as an intersection enlarged map display processing means that is displayed only on a figure .

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