JP2005292001A - Navigation system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a navigation system capable of guiding to destination more accurately, even if accuracy of positional information such as coordinates recorded preliminarily on IC tag is insufficient, by renewing positional information recorded preliminarily on IC tags based on the current position detected by a current position detecting means. <P>SOLUTION: The navigation system has constitution which is equipped with a IC tag memorizing positional information, a current position detector 14 detecting the current position of mobile object, and an IC tag reader writer 12 renewing positional information memorized in the IC tag based on the current position detected by the current position detector 14. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a navigation device that provides route guidance to a destination.

As a conventional navigation device, one that reads position information such as an address and coordinates recorded on an IC card and sets a destination based on the read address and coordinate information is known (for example, Patent Document 1). reference).
JP 2002-181580 A (page 4, FIG. 1)

  However, in the conventional navigation device described above, position information such as coordinates recorded on the IC card is information written in advance by another device, so that the accuracy of the coordinates is insufficient, or the map data of the navigation device Has the problem that the accuracy of coordinates may be different and guidance to the destination becomes inappropriate. The present invention has been made to solve the conventional problems, and an object of the present invention is to provide a navigation device that can update the position information recorded on the IC card in a timely manner.

  The navigation device according to the present invention stores an IC tag that stores position information, a current position detection unit that detects a current position of a moving body, and a current position detected by the current position detection unit. And IC tag updating means for updating the position information.

  With this configuration, the navigation device of the present invention can update the position information stored in the IC tag with the current position detected by the current position detecting means, and therefore can more accurately guide the destination. it can.

  In the navigation device of the present invention, the moving body is a vehicle, and further includes stop position detection means for detecting a stop position of the vehicle, and the IC tag update means is a stop detected by the stop position detection means. The position information stored in the IC tag is updated based on the position information of the position.

  With this configuration, the navigation device of the present invention can update the position information stored in the IC tag based on the position information of the stop position detected by the stop position detecting means, so that it can more accurately return to the destination. Can be provided.

  The navigation device of the present invention further includes an opening / closing detection means for detecting opening / closing of the door, and the stop position detecting means detects that the opening / closing of the vehicle door is detected by the opening / closing detection means. The stop position is detected.

  With this configuration, the navigation device of the present invention detects the stop position when the stop position detecting means detects that the door of the vehicle has been opened and closed by the open / close detecting means. The position information stored in the IC tag can be updated each time opening / closing is performed.

  The navigation device of the present invention further comprises an engine key operation detecting means for detecting an engine key operation, and the stop position detecting means detects that the engine key operation has been performed by the engine key operation detecting means. Then, it has the structure which detects a stop position.

  With this configuration, the navigation device of the present invention detects the stop position when the engine key operation is detected by the engine key operation detection unit, so that each time the engine key is operated, The position information stored in the IC tag can be updated.

  The navigation device of the present invention is further based on the data reading means for reading the position information recorded on the IC tag, the map data recording means for recording the map data, and the position information read by the data reading means. Destination setting means for setting a destination, and route search means for searching for a route from the current position detected by the current position detection means to the destination using the map data recorded in the map data recording means And a route guidance means for guiding a route to the destination, the stop position detecting means detects a stop position where the vehicle has reached the destination and stopped according to the route guidance, and the position of the stop position is detected. The position information recorded on the IC tag is updated by writing the information to the IC tag by the data writing means. That.

  With this configuration, the navigation device of the present invention can update the position information stored in the IC tag with the stop position detected by the stop position detecting means every time the vehicle reaches the destination and stops. Therefore, when visiting the destination again, guidance to the destination can be performed more accurately.

  According to the present invention, since the position information stored in the IC tag can be updated with the current position detected by the current position detecting means, the accuracy of the position information such as coordinates recorded in advance on the IC tag is insufficient. Even if it is, it can guide to the destination more accurately.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is a block diagram showing a basic configuration of a navigation device according to an embodiment of the present invention. As shown in FIG. 1, the navigation device of the present invention includes an IC tag 11, an IC tag reader / writer 12, a map data recording unit 13, a current position detection unit 14, a stop position detection unit 15, and a calculation control unit 16. A memory 17, an operation unit 18, a display unit 19, a sound output unit 20, a door opening / closing detection unit 21, and an engine key operation detection unit 22.

  The IC tag 11 has an IC chip capable of reading and writing data in either a contact type or a non-contact type, and has a configuration in which the IC chip is embedded in a tag or a card. Not only the IC chip but also other media capable of reading and writing data can be used. The data written in the IC chip includes position information for specifying the position. The position information includes coordinate information such as latitude and longitude, or information such as an address and a telephone number. Furthermore, in the case of a tag for merchandise management, the ID number of the merchandise may be recorded, and an external database may be accessed using this ID as a key to retrieve information on the production location and logistics.

  The IC tag reader / writer 12 reads and writes data of the IC tag 11, and can be either a contact type or a non-contact type according to the read / write method of the IC tag 11.

  The map data recording unit 13 is a device for recording map data managed in units of partitions, and is a read-only data recording medium such as a CD-ROM or DVD-ROM, or a data record such as a DVD-RAM or a hard disk drive. This is realized by a rewritable recording medium. The map data includes at least road network data, and the road network data includes nodes representing intersections and links representing roads connecting the nodes. In addition, each data of the node includes the absolute latitude and longitude, the position coordinates expressed by the normalized coordinates within the section unit, intersection name, traffic signal presence, no charge ownership, number of connection links, list of connection links, between connection links Has attributes such as intersection restrictions. In addition, each link data includes the interpolated point coordinates expressed by absolute latitude and longitude and normalized coordinates within the block unit to express the link shape, road type, route number, link type, one-way regulation, width, lane It has attributes such as number, link length, tunnel presence, elevated presence, bridge presence, toll road presence, road name, etc.

  The current position detection unit 14 includes a GPS (Global Positioning System) receiver and a processing unit that calculates a current position based on radio waves received by the receiver, or a speed sensor that detects the speed of a moving object. And a gyro sensor that detects the angular velocity of the turn. Moreover, you may comprise so that the matching process to a road shape may be performed using the road network data of the map data recording part 13. FIG.

  The stop position detection unit 15 determines whether the vehicle is stopped by opening / closing the door of the vehicle or operating an engine key, and acquires the current position from the current position calculation unit 14 when the stop is determined and sets it as the stop position.

  The arithmetic control unit 16 includes a central processing unit (CPU), and uses the memory 17 to perform arithmetic operations and control of each component, or arithmetic operations such as route search and route guidance. The central processing unit (CPU) controls the operation of the entire navigation device.

  The operation unit 18 is used for a user to perform input for setting a destination, and is configured by a remote controller, a touch panel, a keyboard, a mouse, and the like.

  The display unit 19 is an output device for displaying various operation menus, displaying map data, displaying a route search result, displaying a route guidance screen, and the like.

  The voice output unit 20 is an output device for outputting various operation guidance voices and route guidance voices.

  The door opening / closing detection unit 21 detects opening / closing of the door, and the engine key operation detection unit 22 detects operation of the engine key. The stop position detector 15 determines whether the door of the vehicle is opened / closed by the door opening / closing detector 21 and the operation of the engine key by the engine key operation detector 22.

  In the navigation device of the present embodiment, the IC tag reader / writer 12 stores in the IC tag 11 based on the current position detected by the current position detection unit 14 under the control of the central processing unit (CPU) constituting the calculation control unit 16. The updated position information is updated. The IC tag reader / writer 12 constitutes an IC tag update unit, and the current position detection unit 14 constitutes a current position detection unit. More specifically, the IC tag reader / writer 12 detects the current position acquired from the current position calculation unit 14 when the stop position detection unit 15 determines that the vehicle has stopped, that is, the position stored in the IC tag 11 based on the stop position. The information is updated. When the door opening / closing detection unit 21 detects that the door of the vehicle has been opened / closed, the stop position detection unit 15 acquires the stop position. Further, the stop position detection unit 15 may acquire the stop position when the engine key operation detection unit 22 detects that the engine key operation has been performed. The stop position detector 15 constitutes a stop position detector.

  In the navigation device according to the present embodiment, when the user operates the operation unit 18 to input destination information, the calculation control unit 16 uses the position information read from the IC tag 11 by the IC tag reader / writer 12. The ground is set. The arithmetic control unit 16 uses the memory 17 to search for a route from the current position detected by the current position detection unit 14 to the set destination based on the map data recorded in the map data recording unit 13 and display it. The route is guided through the unit 19 and the voice output unit 20. The destination setting means includes an arithmetic control unit 16 and an operation unit 18. The route search means includes an arithmetic control unit 16 and a memory 17. The route guidance means includes an arithmetic control unit 16, a display unit 19, and a voice output unit 20. When the vehicle reaches the destination and stops, the stop position is acquired by the stop position detection unit 15 and written to the IC tag 11 by the IC tag reader / writer 12.

  Next, the operation of the navigation device according to the present embodiment, which is executed under the control of the central processing unit (CPU) constituting the arithmetic control unit 16, will be described with reference to the flowchart of FIG.

  First, data is read from the IC tag 11 by the IC tag reader / writer 12 (step S21). Next, based on the destination information input by the operation unit 18, position information such as latitude and longitude included in the read data is set as the destination. (Step S22).

  Next, route search processing is performed by the arithmetic control unit 16 and the memory 17 (step S23). The route search process is realized by a process such as the Dijkstra method using the road network data recorded in the map data recording unit 13. The result of the route search is recorded in the memory 17.

  Next, the arithmetic control unit 16 and the memory 17 perform route guidance processing according to the position information of the current position acquired from the current position detection unit 14 while referring to the result of the route search recorded in the memory 17 ( Step S24). The route guidance is performed by display on the display unit 19 or voice output to the voice output unit 20.

  Next, when the user arrives at the destination according to the route guidance and stops, the stop position detector 15 detects the stop position by opening / closing the vehicle door or operating the engine key (step S25), and the latitude and longitude of the arrival position. Position information such as information is written to the IC tag 11 by the IC tag reader / writer 12, and the position information stored in the IC tag 11 is updated (step S26). At this time, the update may be performed by overwriting the position information such as the latitude / longitude information written in the IC tag 11, or the position information such as the original latitude / longitude information may be left in another area. Position information such as longitude information may be written.

  According to the navigation device of the present invention, when visiting the spot again, the guidance to the spot can be performed more accurately. In addition, using the navigation device of the present invention, position information such as the exact latitude and longitude of the stop position can be written in advance in the IC tag.

  As described above, according to the navigation device of the present embodiment, by detecting the stop position of the vehicle by opening / closing the door or operating the engine key, and writing the latitude / longitude information of the detected stop position on the IC tag, The latitude / longitude information recorded in the IC tag can be updated.

  In the present embodiment, the IC tag 11 is configured to be updated by the IC tag reader / writer 12 when the vehicle reaches the destination. However, the IC tag 11 is, for example, when the vehicle departs or is temporarily stopped. It may be updated in a timely manner.

  Further, in the present embodiment, the configuration of the in-vehicle navigation device is adopted. However, a configuration in which a portable information terminal such as a mobile phone or a PDA is provided with a current position detection unit such as GPS may be adopted. In addition, latitude and longitude information may not be set in advance in the IC tag, and the current position may be written at an arbitrary point.

  Further, in the present embodiment, the navigation device includes the door opening / closing detection unit 21 that detects the opening / closing of the door and the engine key operation detection unit 22 that detects the operation of the engine key. Or, since the operation of the engine key is generally detected by the vehicle body, it goes without saying that a signal output unit may be provided on the vehicle side and connected to the navigation device. The present invention can take various modifications without departing from the scope of the present invention.

  As described above, since the navigation apparatus according to the present invention can update the position information stored in the IC tag with the current position detected by the current position detection unit 14, the coordinates recorded in the IC tag in advance Even if the accuracy of the location information is insufficient, it has the effect of being able to guide to the destination more accurately, and is useful as a navigation device or the like that performs route guidance at the destination.

The figure which shows the structure of the navigation apparatus in embodiment of this invention. The flowchart which shows the procedure of the navigation in embodiment of this invention

Explanation of symbols

11 IC tag 12 IC tag reader / writer (IC tag update means)
13 Map data recording unit (map data recording means)
14 Current position detection unit (current position detection means)
15 Stop position detector (stop position detector)
16 Arithmetic Control Unit 17 Memory 18 Operation Unit 19 Display Unit 20 Audio Output Unit 21 Door Open / Close Detection Unit (Open / Close Detection Unit)
22 Engine key operation detection unit (engine key operation detection means)

Claims (5)

IC tag for storing position information, current position detecting means for detecting the current position of the moving body, and IC for updating the position information stored in the IC tag based on the current position detected by the current position detecting means A navigation device comprising tag update means. The moving body is a vehicle, and further includes stop position detection means for detecting a stop position of the vehicle, and the IC tag update means stores the IC tag based on the stop position detected by the stop position detection means. The navigation apparatus according to claim 1, wherein the updated position information is updated. In addition, an opening / closing detection means for detecting opening / closing of the door is provided, and the stop position detection means detects a stop position when the opening / closing detection means detects that the door of the vehicle has been opened / closed. The navigation device according to claim 2. In addition, engine key operation detection means for detecting engine key operation is provided, and the stop position detection means detects the stop position when the engine key operation detection means detects that the engine key operation has been performed. The navigation device according to claim 2. Further, data reading means for reading position information recorded on the IC tag, map data recording means for recording map data, and destination setting for setting a destination based on the position information read by the data reading means Route search means for searching for a route from the current position detected by the current position detection means to the destination using map data recorded in the map data recording means, and a route to the destination. A route guide means for guiding, wherein the stop position detecting means detects the stop position at which the vehicle has reached the destination according to the route guidance and stopped, and the data writing means uses the data writing means to detect the position information of the stop position. 5. The position information recorded in the IC tag is updated by writing to the IC tag. The navigation device that is described.

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