JP2009014692A - Navigation device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a user-friendly navigation device capable of displaying the names of roads located in a traveling direction even when the name of a road in a present position cannot be detected. <P>SOLUTION: The navigation device includes a position detecting part, an information recording part, a display part and a control part for controlling the whole device. The information recording part records data such as map information, road information and road name information. The control part detects the present position of a vehicle using the position detecting part when a destination is input, and searches a route. The control part carries out detection processing of the name of the road on which the vehicle is located at present, and displays guide information including the road name and map roads on a display part. When the road on which the vehicle is located at present cannot be detected, the name R35 of the road located ahead in the traveling direction of the vehicle C is detected out of roads located ahead in the traveling direction of the vehicle C using the position detecting part, and a temporary road name "R35" is displayed on a road name display 51'. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a navigation device, and more particularly to a navigation device that displays a road name of a road located in front of a traveling direction.

  2. Description of the Related Art Conventionally, navigation apparatuses that display a road name of a road where a vehicle is currently located on a display unit using map information including the road name have been widely used. This type of navigation device displays the area information of the current location on the display unit when the road name of the road where the vehicle is currently located is not recorded in the map information. There is a problem that it is not easy to use for users.

By the way, in Patent Document 1, the moving speed obtained from the current position of the GPS data is corrected based on the moving route information, and the current position of the current position is corrected by a sudden change in the moving speed due to a complicated road shape or a left / right turn. A navigation device that prevents the estimation accuracy from deteriorating is disclosed. Further, Patent Document 2 discloses a navigation device that automatically records a trajectory when a road that is not in map information is moving. However, these devices cannot solve the above problem.
JP 2005-274506 A JP 2005-181073 A

  The present invention has been made to solve the above-described problem, and even when the road name of the currently located road cannot be detected, the road name of the road located in the forward direction can be displayed. An object of the present invention is to provide a navigation device that is convenient for the user.

  In order to achieve the above object, the invention according to claim 1 is a current position detecting means for detecting a current position of a moving body, and a route from the current position of the moving body detected by the current position detecting means to a destination. A route search means for searching for a road, a map information including a road name, a recording means for recording search information necessary for a route search by the route search means, and a road on which the moving body is currently located using the map information Road name detection means for detecting the road name of the road detected by the road matching means as the current position of the moving body using the road name included in the map information; Display means for displaying guidance information for indicating the route searched by the route search means, and road names detected by the road name detection means; In a navigation apparatus comprising a traveling direction detection means for detecting a traveling direction of a body, an operation means operated by a user to input a destination, etc., and a control means for controlling each part of the apparatus, When the road where the moving body is currently located cannot be detected using the road matching means, the control means is configured to select the moving body from among roads located in front of the traveling direction detected by the traveling direction detecting means. The road name of the road closest to the current position (hereinafter referred to as a temporary road name) is detected, and the detected temporary road name is displayed on the display means.

  According to a second aspect of the present invention, in the navigation device according to the first aspect, the control means uses the road name detection means to detect a road name of the road detected by the road matching means when the moving body is currently located. Detecting, as a result of this detection, when it is detected that there is no road name on the corresponding road, when the moving body moves on the road where the current position is located, the road that intersects or merges first is detected, A road name of the detected road is detected using a road name included in the map information, and the detected road name is displayed on the display means as a temporary road name.

  The invention according to claim 3 is the navigation device according to claim 2, wherein the control means detects the road name of the road detected as the first intersection or merge, and as a result, there is no road name. The road that reaches the shortest travel distance from the current position is detected, the road name of the detected road is detected using the road name included in the map information, and the detected road name is displayed as the temporary road name. It is displayed on the means.

  According to a fourth aspect of the present invention, in the navigation apparatus according to the first aspect, when the control unit cannot detect the road on which the moving body is currently located using the road matching unit, the operation unit is operated by a user. When a predetermined input operation is performed using the, the road name of the road ahead of the current position of the mobile object is displayed on the display means as a temporary road name, and an arrow indicating the direction of the temporary road viewed from the current position Is displayed on the display means.

  According to a fifth aspect of the present invention, in the navigation device according to any one of the first to third aspects, the control unit cannot detect the road on which the moving body is currently located using the road matching unit. The temporary road name is detected, the current position of the moving body, the traveling direction, and the detected temporary road name are recorded in the recording means, and then the moving body is recorded in the recording means. When the current position is moved along the traveling direction recorded in the recording means, the temporary road name recorded in the recording means is displayed on the display means.

  According to a sixth aspect of the present invention, in the navigation device according to any one of the first to fifth aspects, the road name display method displayed as a temporary road name on the display means and the road name detection means are detected. This is different from the normal way of displaying road names.

  According to the first to fourth aspects of the present invention, the control means detects the traveling direction when the moving object cannot detect the road where the current position is located, or when there is no road name of the road where the moving position is present. The road name of the road closest to the current position of the moving body (hereinafter referred to as a temporary road name) is detected from the roads located in front of the traveling direction detected by the means, and the detected temporary road name is displayed. To display. Therefore, even when the road name of the currently located road is not displayed, the temporary road name can be displayed, which is convenient for the user.

  According to the invention of claim 5, when the moving body moves the current position recorded on the recording means along the traveling direction recorded on the recording means, the temporary road name recorded on the recording means Is displayed on the display means, it is not necessary to detect the temporary road name again, and the processing efficiency when displaying the temporary road name is good.

  According to the invention of claim 6, since the display method of the road name displayed as the temporary road name on the display means is different from the display method of the normal road name, the road name displayed on the display means by the user Can be prevented from being mistaken for a temporary road name.

  Hereinafter, a navigation apparatus according to an embodiment of the present invention will be described with reference to FIG. FIG. 1 is a block diagram showing the internal configuration of the navigation apparatus 1. The navigation device 1 is attached to a vehicle (moving body) and displays guidance information for a user to search for a route from a current position to a destination and indicate the searched route.

  The navigation device 1 includes an input operation unit (operation unit) 2, a position detection unit (current position detection unit) 3, an information recording unit (recording unit) 4, a display unit (display unit) 5, and a voice guidance unit 6. And a traffic information receiving unit 7 and a control unit (control means) 10 for controlling the entire apparatus.

  The input operation unit 2 is operated by a user, and is used for inputting information related to route guidance such as a departure place and a destination. The input operation unit 2 includes an operation panel 21 for inputting a route search condition, requesting route guidance, and the like to the navigation device 1 by touch operation or key operation.

  The position detector 3 uses a satellite navigation system (GPS) to obtain current position information such as the latitude and longitude of the vehicle from a GPS antenna, and the traveling direction of the vehicle is absolute by using geomagnetism. A geomagnetic sensor (traveling direction detecting means) 32 that detects the heading, a gyro sensor (traveling direction detecting means) 33 that detects the heading direction of the vehicle in a relative direction, and a distance that detects the travel distance of the vehicle from the rotational speed of the wheels. Sensor 34. The position detector 3 detects the current position of the vehicle using position information, direction information, distance information, and the like detected by the GPS receiver 31 and the sensors 32 to 34.

  The information recording unit 4 is a recording device that records information necessary for route search, such as a navigation program and data, and includes a recording medium such as a CD-ROM or a DVD-ROM. The program recorded in the information recording unit 4 is a program for performing processing such as route search, a display output control program necessary for route guidance display, and a voice output control necessary for voice guidance. It is a program.

  Data recorded in the information recording unit 4 includes map information, road information, road name information, toll road / ferry usage fee, map information matching data, registration point data (address, telephone number, etc.), genre-specific data, calendar Data and data necessary for the program recorded in the information recording unit 4. Note that only data may be recorded on a recording medium such as a CD-ROM, and the program may be recorded on the control unit 10.

  The display unit 5 includes a simple liquid crystal display and the like, and displays route guidance information from the current position of the vehicle to the destination on the display screen. The guidance information includes information about the destination, destination name, time, distance, route to the destination, and the like. The display unit 5 can be used as the operation panel 21 using a touch panel or the like formed on the display screen, and various operations can be performed by the user touching the screen.

  The voice guidance unit 6 performs route guidance by voice, a voice output unit 61 that outputs a guidance voice signal formed by the control unit 10, and a speaker 62 that amplifies the output voice from the voice output unit 61. Is provided. The voice guidance of the voice guidance unit 6 allows the user to know route guidance information without looking at the display unit 5.

  The traffic information receiving unit 7 includes a VICS / FM multiplex receiver 71 that sequentially receives the current road traffic information of the road where the vehicle is currently located. VICS (Vehicle Information & Communication System) provides road traffic information such as traffic congestion information and traffic accident information in real time, and incorporates road traffic information from FM multiplex (text broadcasting), radio wave beacon and optical beacon. Yes. The road traffic information received by the VICS is transmitted to the control unit 10, and the control unit 10 performs route search to the destination and the like in consideration of the road traffic information.

  The control unit 10 includes a CPU 11, a flash memory 12, a ROM 13, and a RAM 14, and functions as route search means, road matching means, and road name detection means in the claims. The flash memory 12 stores a program recorded in the information recording unit 4. The ROM 13 stores a program for checking a program stored in the flash memory 12 in advance. The RAM 14 temporarily stores route guidance information, destination point coordinates, detected road names, and other data. Note that all the programs used in the present embodiment may be stored in the information recording unit 4, or some or all of these programs may be stored in the ROM 13.

  Next, guidance information for indicating a route searched for by the navigation device 1 will be described with reference to FIGS. FIG. 2 shows a procedure for displaying guidance information on the display unit 5, and FIG. 3 shows a procedure for road name detection processing.

  First, when the user inputs a destination by operating the input operation unit 2 (S1), the control unit 10 detects the current position of the vehicle using the position detection unit 3 (S2), and the target position is determined from the current position. A route search to the ground is performed (S3). After the route search, the control unit 10 performs a road name detection process (S4) of the road where the vehicle is currently located, and displays guidance information including the road name detected by the process of S4 and the map road. This is displayed on part 5.

  In the road name detection process of S4, as shown in FIG. 3, the control unit 10 detects the road where the vehicle is currently located using the map information recorded in the information recording unit 4 (S11). When a road is detected (YES in S12), the road name of the road detected in S11 is detected using the road name information recorded in the information recording unit 4 (S13). And as a result of detection, when there is a road name (YES in S14), the control unit 10 ends the process. The process when the road at the current position cannot be detected (NO at S12) and when the road detected at S11 has no road name (NO at S14) will be described later.

  Next, guidance information displayed on the display unit 5 will be described with reference to FIG. FIG. 4 shows map information, a triangle C indicating the current position of the vehicle, and a road name display 51 of the road where the vehicle is currently displayed, displayed on the display unit 5. Here, as a result of the process of FIG. 3, the road where the current position is detected can be detected, and the detected road has a road name. As shown in FIG. 4, the vehicle is located on the road R11. Therefore, “R11” is displayed on the road name display 51.

  Next, the process when a road cannot be detected in the process of S11 (NO in S12) will be described with reference to the flowchart shown in FIG. When the road where the vehicle is currently located cannot be detected (NO in S12 of FIG. 3), the control unit 10 determines from the roads located in front of the traveling direction of the vehicle detected using the position detection unit 3; The closest road from the current position of the vehicle is detected (S21), and the road name of the detected road is detected as a temporary road name (S22).

  FIG. 6 shows an example in which the temporary road name detected by the process shown in FIG. As shown in FIG. 6, when the vehicle C is located on a road that is not included in the road information recorded in the information recording unit 4, for example, a newly established road, the control unit 10 Through the processing, the road name R35 of the road located in front of the traveling direction of the vehicle C is detected, and the temporary road name “R35” is displayed on the road name display 51 ′.

  The road name display 51 ′ is different in display method from the road name display 51 shown in FIG. In the present embodiment, in the road name display 51 shown in FIG. 4, the road name is surrounded by a solid line. However, in the road name display 51 ′ shown in FIG. 6, the display method is changed by surrounding the road name with a dotted line. It is different. Therefore, it is possible to prevent the user from recognizing the temporary road name displayed on the display unit 5 as a road name. The display of the road name and the temporary road name may be made different by any display method such as changing the display color.

  Next, the process when there is no road name in the process of S13 (NO in S14) will be described with reference to the flowchart shown in FIG. When there is no road name on the road where the vehicle is currently located (NO in S14 in FIG. 3), the control unit 10 selects the road that intersects or merges first when the vehicle moves on the road where the vehicle is currently located. Detected (S31), the road name of the detected road is detected using the road name information recorded in the information recording unit 4 (S32), and if there is a road name (YES in S33), the detected road The name is a temporary road name. The process when the road name cannot be detected in the process of S32 (NO in S33) will be described later.

  FIG. 8 shows an example in which the temporary road name detected by the process shown in FIG. As shown in FIG. 8, when the road name of the road on which the vehicle C is moving is not recorded in the information recording unit 4, the control unit 10 The road name of the road that intersects or merges first is detected as a temporary road name. As shown in FIG. 8, when the road on which the vehicle is currently located moves in the direction of the white arrow, it intersects the road named “R35” first. Therefore, the temporary road name “R35” is displayed on the road name display 51 ′.

  Next, in the process of S32, the process when there is no road name of the road that intersects or merges first (NO in S33 of FIG. 7) will be described with reference to the flowchart shown in FIG. In this case, the control unit 10 detects a road that arrives at the shortest travel distance from the current position of the vehicle (S41), and detects the road name of the detected road as a temporary road name (S42).

  Next, referring to FIG. 10 and FIG. 11 for processing when a predetermined input operation is performed by the user using the input operation unit 2 when a road cannot be detected in the processing of S11 (NO in S12). To explain. 10 and 11 show an example of guidance information displayed on the display unit 5. When a predetermined input operation is performed by the user using the input operation unit 2, the road name of the road ahead of the current position of the vehicle is displayed on the road name display 51 ′ of the display unit 5 as a temporary road name, and the current position An arrow indicating the direction of the temporary road name viewed from the above is displayed on the display unit 5.

  As shown in FIG. 10, when the user performs a predetermined input operation using the input operation unit 2 and the road name in the direction of the white arrow is displayed as a temporary road name, the road name display 51 ′ displays “ R11 "is displayed.

  As shown in FIG. 11, when the user operates the input operation unit 2 in the same manner as described above, when the road name in the direction of the white arrow is displayed as a temporary road name, the road name display 51 ′ displays “ R35 "is displayed.

  Next, the process of recording the temporary road name detected by the above-described process in the information recording unit 4 will be described with reference to the flowchart shown in FIG. When the road where the vehicle is currently located cannot be detected, the control unit 10 detects the temporary road name as described above. At that time, the control unit 10 records the current position of the vehicle, the traveling direction, and the detected temporary road name in the information recording unit 4 (S51).

  Next, the process of displaying the temporary road name recorded in the information recording unit 4 will be described with reference to the flowchart shown in FIG. The control unit 10 moves the current position recorded in the information recording unit 4 along the traveling direction recorded in the information recording unit 4 when the road on which the vehicle is currently located cannot be detected. If yes (YES in S61), the temporary road name recorded in the information recording unit 4 is displayed on the display unit 5 (S62). Therefore, the control unit 10 does not need to detect the temporary road name again, so that the processing efficiency when displaying the temporary road name is good.

  As described above, according to the navigation device 1 according to the present embodiment, when the control unit 10 cannot detect the road where the vehicle is currently located, or when there is no road name of the road where the vehicle is currently located, the control unit 10 described above. The temporary road name is detected by each of the processes, and the detected temporary road name is displayed on the display unit 5. Therefore, even when the road name of the currently located road is not displayed, the temporary road name can be displayed, which is convenient for the user.

  In addition, this invention is not limited to the structure of the said embodiment, A various deformation | transformation is possible suitably in the range which does not change the meaning of invention. For example, in the present embodiment, the case where the navigation device 1 is attached to a vehicle has been described. However, a portable navigation device that can be carried by a user may be used.

The block diagram which shows the internal structure of the navigation apparatus which concerns on one Embodiment of this invention. The flowchart which shows the procedure of the guidance information display process of the said apparatus. The flowchart which shows the procedure of the detection process of the road name in the display process of the said guidance information. The figure explaining the guidance information displayed by the said guidance information display process. The flowchart which shows the procedure of a road name detection process when the road where the present position is not detected in the display process of the said guidance information. The figure explaining the guidance information displayed by the detection process of the said road name. The flowchart which shows the procedure of the detection process of the road name when there is no road name in the display process of the said guidance information. The figure explaining the guidance information displayed by the detection process of the said road name. The flowchart which shows the procedure of a road name detection process when there is no temporary road name in the said road name detection process. The figure explaining the guidance information displayed by the detection process of the said road name. The figure different from the above explaining the guidance information displayed by the detection process of the said road name. The flowchart which shows the procedure of the process which records a temporary road name. The flowchart which shows the procedure of the process which displays the recorded temporary road name.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Navigation apparatus 2 Input operation part (operation means)
3 Position detector (current position detector)
4 Information recording section (recording means)
5 Display section (display means)
10 Control unit (route search means, road matching means, road name detection means, control means)
32 Geomagnetic sensor (traveling direction detection means)
33 Gyroscope (traveling direction detection means)

Claims (6)

Current position detecting means for detecting the current position of the moving body;
Route search means for searching for a route from the current position of the moving object detected by the current position detection means to the destination;
Recording means for recording map information including road names and search information necessary for route search by the route search means;
Road matching means for detecting a road where the moving object is currently located using the map information;
Road name detection means for detecting a road name of a road detected by the road matching means as the current position of the mobile body using a road name included in the map information;
Display means for displaying guidance information for indicating a route searched by the route search means, and a road name detected by the road name detection means;
A traveling direction detection means for detecting a traveling direction of the moving body;
An operation means operated by the user to input a destination and the like;
In a navigation device comprising a control means for controlling each part of the device,
The control means includes
When the road on which the moving body is currently located cannot be detected using the road matching means, the road located in front of the traveling direction detected by the traveling direction detecting means is selected from the current position of the moving body. A navigation device characterized by detecting a road name of the nearest road (hereinafter referred to as a temporary road name) and displaying the detected temporary road name on the display means. The control means includes
Detecting the road name of the road detected by the road matching means as the current position of the moving body using the road name detection means,
As a result of this detection, when it is detected that there is no road name on the corresponding road, when the moving body moves on the road where the current position is located, the road that intersects or merges first is detected and detected. The navigation apparatus according to claim 1, wherein a road name of a road is detected using a road name included in the map information, and the detected road name is displayed on the display unit as a temporary road name. . The control means includes
If there is no road name as a result of detecting the road name detected as the first intersection or merge, the road that reaches the shortest travel distance from the current position is detected, and the road name of the detected road The navigation apparatus according to claim 2, wherein a road name included in the map information is detected and the detected road name is displayed on the display means as a temporary road name. The control means includes
A road ahead of the current position of the moving body when a predetermined input operation is performed by the user using the operating means when the road where the moving body is currently located cannot be detected using the road matching means. The navigation apparatus according to claim 1, wherein the road name is displayed on the display unit as a temporary road name, and an arrow indicating the direction of the temporary road viewed from the current position is displayed on the display unit. The control means includes
When the road where the moving body is currently located cannot be detected using the road matching means, the temporary road name is detected, the current position of the moving body, the traveling direction, and the detected temporary road name Is recorded in the recording means when the moving body moves the current position recorded in the recording means along the traveling direction recorded in the recording means. 4. The navigation apparatus according to claim 1, wherein a temporary road name is displayed on the display means.   The display method of a road name displayed as a temporary road name on the display means is different from the display method of a normal road name detected by the road name detection means. 6. The navigation device according to any one of 5.

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