JP2005308758A - Navigation device, navigation method, navigation program, and recording medium for recording the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a navigation device for performing route guidance or present position indication on a movable body even if a portable recording medium is taken out, as to a navigation device having a portable recording medium for storing therein map data. <P>SOLUTION: This navigation device 100 is equipped with a DVD disk drive 105 for reading data from a DVD disk 200 with data such as map data previously recorded therein, a map data storage part 106 for previously therein storing the map data obtained from the DVD disk 200 when performing route guidance, and a system control part 115 for controlling the whole of a system. When the DVD disk 200 is taken out of the disk drive 105 during a transfer operation of map data corresponding to a geographical domain, the control part 115 interrupts the transfer operation on map data corresponding to the geographical domain to perform route guidance based on map data which have been transferred to the storage part 106 before the transfer operation is interrupted. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention belongs to the technical field of navigation devices that perform route guidance of a moving object.

  In recent years, navigation apparatuses that guide the movement of a moving body such as a vehicle by displaying a map on a display such as a liquid crystal display panel mounted on the vehicle or the like have been widely generalized.

In such a navigation device, when a user sets a destination, map data is acquired from a recording medium such as a DVD disc, and the map data is based on the current position of the mobile object on which the navigation device is mounted. A route search is performed, and a moving body is guided based on the searched route (see, for example, Patent Document 1).
JP 11-339398 A

  However, in a navigation apparatus having a portable recording medium such as a DVD disk for recording map data, map data is obtained by always accessing the portable recording medium when the route of the moving body is guided, and the obtained map Since the route guidance and the current position display of the moving object are performed based on the data, the map data is acquired when the portable recording medium is taken out from the navigation device when the route of the moving object is guided. The route of the moving body could not be performed.

  The present invention has been made in view of the above-described problems. As an example of the problem, in a navigation apparatus having a portable recording medium for recording map data, the portable recording medium is taken out. Another object is to provide a navigation device that can perform route guidance or display the current position of a moving body, and that can be reduced in size and reduced in size.

  In order to solve the above-mentioned problems, the invention of the navigation device according to claim 1 is characterized in that an acquisition means for acquiring a current position of a moving body, a registration means for registering a destination, and a portable type in which map data is recorded. A route to the destination is set on the basis of the reading means that attaches the recording medium and reads at least the recorded map data, the acquired current position, the registered destination, and the map data A setting unit, a storage unit capable of storing the map data, a geographical range including the set route is determined based on the set route, and map data corresponding to the geographical range is stored in the Transfer means for transferring from a portable recording medium to the storage means, and route guidance means for performing route guidance based on the set route, wherein the geographical category by the transfer means is provided. When the portable recording medium is taken out from the reading means during the map data transfer operation corresponding to the map data, the transfer means interrupts the map data transfer operation corresponding to the geographical range, and the route The guiding means performs route guidance based on the map data transferred to the storage means until the transfer operation is interrupted.

  Further, the invention of the navigation method according to claim 4 is provided with an acquisition step of acquiring the current position of the mobile body, a registration step of registering the destination, and a portable recording medium on which map data is recorded. A reading step for reading at least recorded map data; a setting step for setting a route to the destination based on the acquired current position, the registered destination and the map data; and the setting A transfer step of determining a geographical range including the set route based on the determined route, and transferring map data corresponding to the geographical range from the portable recording medium to a storage means capable of storing the map data And a route guidance step for performing route guidance based on the set route, and during the transfer operation of the map data corresponding to the geographical range by the transfer step When the portable recording medium is taken out, the transfer operation of the map data corresponding to the geographical range is interrupted in the transfer step, and the transfer operation is interrupted in the route guidance step. Route guidance is performed based on the map data transferred to the storage means.

  The invention of the navigation program according to claim 5 is a navigation program for guiding the route of the moving body by a computer, and registers the destination, the acquisition means for acquiring the current position of the moving body, and the computer. Registration means, reading means for loading a portable recording medium on which map data is recorded and reading at least the recorded map data, based on the acquired current position, the registered destination, and the map data Setting means for setting a route to the destination, determining a geographical range including the set route based on the set route, and storing map data corresponding to the geographical range in the portable recording medium Transfer means for transferring the map data to a storage means capable of storing the map data, and route guidance based on the set route. When the portable recording medium is taken out from the reading means during the transfer operation of the map data corresponding to the geographical range by the transfer means, the transfer means The transfer operation of the map data corresponding to the geographical range is interrupted, and the route guidance means performs the route guidance based on the map data transferred to the storage means until the transfer operation is interrupted. It is characterized by functioning.

  Next, an embodiment suitable for the present application will be described with reference to the drawings.

  In addition, embodiment described below is embodiment at the time of applying the navigation apparatus 100 based on this application to the vehicle-mounted navigation apparatus 100, and demonstrates using the DVD disc 200 as a portable recording medium.

  First, the overall configuration and outline operation of the navigation device 100 according to the present embodiment will be described with reference to FIG.

  FIG. 1 is a block diagram showing a schematic configuration of the navigation device 100 according to the present application.

  As shown in FIG. 1, the navigation device 100 according to the present embodiment is connected to an antenna AT, receives a GPS (Global Positioning System) data, and receives a GPS (Global Positioning System) data. Unit 102, interface 103 for calculating the vehicle position based on GPS data and travel data, VICS data receiving unit 104 for receiving VICS (Vehicle Information Communication System) data, and data such as map data are recorded in advance. A DVD disk drive 105 that reads data from the existing DVD disk 200, a map data storage unit 106 that obtains and stores map data from the DVD disk 200 in advance when performing route guidance, and a system in which the user makes each setting. The operation unit 107 used when inputting a command to A microphone 108 that collects the user's voice, a voice recognition circuit 109 that recognizes a command instructed to the system from the voice collected by the microphone 108, a display unit 110 that displays map data and the position of the vehicle, A display control unit 112 that controls the display unit 110 using the buffer memory 111, an audio processing circuit 113 that generates audio such as route guidance, a speaker 114, a system control unit 115 that controls the entire system, and a ROM / RAM 116 The system control unit 115 and each unit are connected by a bus 117.

  For example, the GPS receiving unit and sensor unit 102 of the present embodiment constitute an acquisition unit according to the present invention, and the DVD disk drive 105 of the present embodiment constitutes a reading unit according to the present invention.

  Further, for example, the map data storage unit 106 of the present embodiment constitutes a storage unit according to the present invention, and the operation unit 107 of the present embodiment constitutes a registration unit according to the present invention.

  Further, for example, the system control unit 115 of the present embodiment constitutes a registration unit, a setting unit, a transfer unit, and a route guidance unit according to the present invention.

  The GPS receiving unit 101 receives navigation radio waves from a plurality of artificial satellites belonging to the GPS via the antenna AT, and calculates pseudo coordinate values of the current position of the moving body based on the received radio waves to obtain GPS data. Are output to the interface 103 as follows.

  The sensor unit 102 is configured to detect the traveling data of the traveling speed, acceleration, and azimuth of the vehicle, and output the detected traveling data to the interface 103.

  Specifically, the sensor unit 102 detects the traveling speed of the vehicle, converts the detected speed into speed data having a pulse or voltage form, and outputs the speed data to the interface 103.

  The sensor unit 102 detects the moving state of the vehicle in the vertical direction by comparing the gravitational acceleration and the acceleration generated by the movement of the vehicle, and the acceleration data indicating the detected moving state is in the form of a pulse or a voltage. And output to the interface 103.

  Further, the sensor unit 102 is constituted by a so-called gyro sensor, detects the azimuth angle of the vehicle, that is, the traveling direction in which the vehicle is traveling, and converts the detected azimuth angle into azimuth angle data having a pulse or voltage form. Are output to the interface 103.

  The interface 103 performs interface processing between the sensor unit 102 and the GPS receiving unit 101 and the system control unit 115, calculates the vehicle position based on the input GPS data and travel data, and The own vehicle position is output to the system control unit 115 as own vehicle position data.

  The own vehicle position data is collated with map data in the system control unit 115, and a map matching process or the like is executed.

  The VICS data receiving unit 104 acquires VICS data by receiving radio waves such as FM multiplex broadcasting, and outputs the acquired VICS data to the system control unit 115.

  VICS refers to a road traffic information communication system, and VICS data refers to road traffic information such as traffic jams, accidents, and regulations.

  The DVD disk drive 105 has a storage unit for detachably storing the DVD disk 200 and a reading drive for reproducing the DVD disk 200. Map data such as a road map recorded on the DVD disk 200 in advance and other data Information necessary for travel guidance (hereinafter referred to as map data and the like) is read out, and the read out map data and the like are output to the system control unit 115 and the map data storage unit 106.

  The map data and the like include map data including road shape data necessary for navigation operations, and various related data such as related facility data and name data stored in association with road shape data. The whole is divided into a plurality of mesh-like blocks, and map data corresponding to each block is managed as block map data.

  The DVD disk drive 105 can also play back a DVD disk 200 in which content data such as audio and video and other data (hereinafter referred to as content data) are recorded. The content information is output to the audio processing circuit 113 or the display control unit 112 via the system control unit 115.

  The map data storage unit 106 is composed of, for example, a non-volatile memory, and when the route from the current position of the vehicle to the destination is set, the current position of the vehicle and the set destination before starting the route guidance of the vehicle Block map data acquired from the DVD disk 200 is stored on the basis of the route to the ground and transfer conditions described later.

  Further, the map data storage unit 106 outputs the map data stored on the basis of an instruction from the system control unit 115 to the display unit 110 and the voice processing circuit 113 when route guidance is being performed. Yes.

  The details of the operation (transfer operation) of the block map data stored in the map data storage unit 106 will be described later.

  The operation unit 107 is configured by a remote control device including a number of keys such as various confirmation buttons and numeric keys, and in particular, a display command of vehicle travel information, input and setting of a destination to be reached by the vehicle, etc. It is used to input a driver's command.

  The speech recognition circuit 109 is configured to receive speech utterances and the like generated by the user input to the microphone 108. For example, the speech recognition circuit 109 can input speech as an operation command of the navigation device. The voice is analyzed, and the analysis result is output to the system control unit 115.

  The display unit 110 is configured by, for example, a CRT or a liquid crystal display element, and displays map data and the like in various modes according to the control of the display control unit 112, and is superimposed on this to be necessary for route guidance such as the vehicle position. Various statuses are displayed, and content information other than map data is displayed.

  The display control unit 112 is input with map data and content data input via the system control unit 115, and the display control unit 112 is based on an instruction from the system control unit 115. Display data to be displayed on the display unit 110 is generated and temporarily stored in the buffer memory 111, while the display data is read from the buffer memory 111 at a predetermined timing and displayed on the display unit 110.

  The audio processing circuit 113 generates an audio signal based on an instruction from the system control unit 115, and amplifies the generated audio signal through the speaker 114. For example, the traveling direction of the vehicle at the next intersection In addition, information related to route guidance (hereinafter referred to as route guidance information) including traffic jam information or traffic stop information that should be notified directly to the driver on the driving guidance is output to the speaker 114 as an audio signal.

  The system control unit 115 is mainly configured by a central processing unit (CPU) and includes various input / output ports such as a GPS reception port, a key input port, a display unit 110 control port, and the like. General functions are controlled.

  The system control unit 115 controls the operation of the entire navigation apparatus, reads a control program stored in the ROM / RAM 116, executes each process, and temporarily stores the data being processed in the ROM / RAM 116. It is supposed to hold.

  For example, the system control unit 115 performs correction processing such as map matching based on the vehicle position data and map data output from the interface 103 when performing route guidance, and also displays the current position of the vehicle on the display unit 110. The route guidance information is controlled so as to be displayed on a map showing the surrounding area including, and the travel route information and the like are output from the voice processing circuit 113 as voice.

  In addition, when the destination is input by the user's operation and the route is set, the system control unit 115 sets the DVD disc drive 105 based on the set route and the set transfer conditions before starting the route guidance. The map data and the like recorded on the stored DVD disc 200 are controlled to be transferred to the map data storage unit 106, and the route guidance is performed even if the DVD disk 200 having the map data and the like is attached and detached during route guidance. Can be done.

  Details of transfer control in the system control unit 115 of this embodiment will be described later.

  Further, the system control unit 115 manages the stored map data for route guidance in accordance with route guidance, and should be displayed from the map data storage unit 106 to be displayed during route guidance. Map data and the like are acquired and output to the display unit 110 via the display control unit 112.

  Next, map data and the like recorded on the DVD disk 200 and stored in the map data storage unit 106 will be described with reference to FIG.

  FIG. 2 is a diagram for explaining the concept of blocks that are division units of map data to be recorded and stored.

  As described above, the DVD disc 200 stores map data including road shape data necessary for the navigation operation, and further stores various related data such as related facility data and name data in association with the road shape data. In the present embodiment, the entire map is divided into blocks as mesh unit areas on the DVD disc 200, and map data corresponding to each block is recorded as block map data. .

  As shown in FIG. 2, the map data is managed by dividing the entire area on the map into M blocks in the east-west direction and N in the north-south direction. , Block (i, j) is defined as the i-th block from the west and the j-th block from the north, and the block from the north-west end block (1, 1) to the south-east end block (M, N) is M × N pieces of blocks having the same shape are assembled to form the entire map data.

  In this embodiment, the entire map is a rectangular area, and each unit block is also a rectangular area. However, in actuality, a map having a complicated overall shape is handled. Each block shape is not limited to the same shape, and the scale of each block map data is not necessarily the same.

  In the description of the present embodiment, for simplicity, it is assumed that each block is a rectangular region having the same shape. However, the present invention can be applied even when the block shape is more complicated.

  Next, transfer control in the system control unit 115 of this embodiment will be described with reference to FIGS.

  First, the principle of transfer control in the system control unit 115 of this embodiment will be described with reference to FIG.

  FIG. 3 is a diagram for explaining transfer control in the system control unit 115 of the present embodiment.

  As described above, when the destination is input by the user's operation and the route is set, the system controller 115 sets the set route, the current location of the vehicle, and the set route characteristics before starting the route guidance. The map data recorded on the DVD disk 200 stored in the DVD disk drive 105 is controlled to be transferred to the map data storage unit 106 based on the transfer conditions such as, and the map data is included during route guidance. The route can be guided even when the DVD disk 200 is attached or detached.

  Specifically, the system control unit 115 according to the present embodiment includes block map data including a set route (hereinafter referred to as route map block data) and block map data around the route map block data (hereinafter referred to as “route map block data”). The peripheral map block data is transferred to the map data storage unit 106, and the suitability of the peripheral map block data to be transferred, that is, the geographical range is determined according to the characteristics of the set route, and the transfer is determined. The peripheral map block data is transferred to the map data storage unit 106.

  Note that, in the present embodiment, details of the determination of the suitability of the surrounding map block data to be transferred will be described later.

  Usually, once the route to which the vehicle to the destination should travel is set, and the vehicle follows the set route, the destination can be reached. If only the block map data including the set route is transferred, route guidance is possible.

  However, there are many cases of re-searching and resetting the route due to traffic conditions such as traffic jams or traffic accidents, or sudden changes or additions of the waypoints by the user, and only by the route set at the start of driving. When block map data is transferred on the assumption that route guidance is performed, block map data deviating from the set route is not transferred. For this reason, when the route is re-searched and the reset route is included in the block map data deviating from the set route, the block map data is stored in the map data from the DVD disc 200. It is necessary to transfer to the unit 106. Further, in this case, when the DVD disk 200 in which the map data is recorded in advance is not stored in the DVD disk drive 105 when the route is reset, the user operation becomes complicated.

  In addition, if the transfer operation of the block map data is performed every time the route is reset, the processing of the system control unit 115 becomes excessive and the guidance cannot be started quickly, while the route is searched again. In the case of resetting, the destination and the current position of the vehicle are not changed, so the route is rarely changed significantly.

  Therefore, in this embodiment, in addition to the block map data having the set route, even if the route is re-searched, the road selected when the route is reset is predicted in advance and blocked. Map data is transferred.

  For example, as shown in FIG. 3, when a route from a departure place to a destination is set, route map block data and surrounding map block data transferred to the map data storage unit 106 based on the set route are It is supposed to be transferred.

  In FIG. 3, a route when the set route includes a general road, a highway, and a motorway (hereinafter referred to as a highway), and a route transferred based on the route. Shows the geographical range of the map block data and the surrounding map block data, and the surrounding map block data near the highway expressway included in the route and around the destination are more block maps than the surroundings of other routes Indicates that data is being transferred.

  In the present embodiment, the block map data is transferred every time the route is set, but in order to display the current position of the vehicle at the time of starting the system and to determine the block map data to be transferred, Normally, the ROM / RAM 116 covers the entire block map data, and the map data of the entire map, which is roughly scaled with the block map data, is stored, and the system control unit 115 is activated when the entire system is activated. In order to prevent problems in data transfer, the map data of the entire map is checked.

  Next, determination of the suitability of surrounding map block data to be transferred in the present embodiment will be described with reference to FIGS.

  4 and 5 are diagrams for explaining the determination of appropriateness of peripheral map block data to be transferred in the present embodiment, and FIGS. 6 to 9 are routes transferred by the transfer operation of the present embodiment. It is an example of map block data.

  In this embodiment, as shown in FIG. 4A, in principle, the system control unit 115 transfers the block map data of nine planes around the route map block data including the set route as the peripheral map block data. Based on the transfer conditions, increase / decrease of the surrounding map block data around the route map block data is determined.

  For example, when the route set in the route map block data is an expressway and includes an entrance / exit of the expressway, the system control unit 115 includes a destination or waypoint of the route set in the route map block data When the route set in the route map block data is an urban area, and when the route map block data includes the vehicle position at the time of route setting, the route is re-searched and the probability that the route will be changed is high. Since the route is frequently changed to the road around the set route, the surrounding map block data to be transferred is increased based on the route map block data.

  Specifically, in the present embodiment, when increasing the surrounding map block data, the system control unit 115, as shown in FIG. 4 (b), around nine areas around the normal route map block data Map block data is increased to 25 pages.

  On the other hand, when the route set in the route map block data is an expressway, and when the route set in the route map block data is a general road and is a suburb that is not an urban area, the system control unit 115 Even if it is re-searched and the route is changed, the actual travel route is rarely changed. Therefore, the surrounding map block data to be transferred is reduced based on the route map block data.

  Specifically, in this embodiment, the system control unit 115, when reducing the surrounding map block data, as shown in FIGS. 5A, 5B, and 5C, the normal route map block data. The peripheral map block data of the nine surrounding areas is reduced to three planes of only the peripheral block data in the traveling direction.

  In addition, since the surrounding map block data corresponding to the traveling direction of the vehicle on the route is determined by the entire block map data to be transferred, there is the route map block data. To be determined.

  Further, in this embodiment, the system control unit 115 is recorded in advance in the block map data such as the amount of block map data and, for example, the adjacent block map data is always transferred when the block map data is transferred. Appropriateness of the surrounding map block data to be transferred is determined based on the data of a certain geographical area.

  Specifically, when the data amount of one block map data is large, it is estimated that there are many roads included in the one block map data, and the route to the destination is re-searched according to the road condition as described above. This is because there are many roads that can be routes, and the route can be re-searched and reset sufficiently even with a small amount of block map data.

  Further, the system control unit 115 reads the management data attached to the block map data when transferring the block map data, and, as described above, regardless of whether the transfer of the block map data to be transferred is appropriate or not. The block map data to be transferred is determined based on the data.

  For example, block map data to be transferred as described above is not transferred to block map data when a road that can be a route exists across multiple block map data due to topographical problems such as road shape. In order to prevent this, when transferring any one of a plurality of block map data, the other block map data is forcibly transferred or the past driving situation of the vehicle causes a route such as near the home. It is described that when it is determined that there are few resets, the transfer of the surrounding block map data is stopped.

  Furthermore, since the route from the current position to the destination is a long distance, the system control unit 115 of the present embodiment exceeds the data capacity that is normally stored in the map data storage unit 106 and is set for all the set routes. When the block map data is not stored in the map data storage unit 106, when the occurrence of a route re-search is naturally predicted in a situation where a plurality of routes can be set, the blocks in all the set routes When the map data is not stored in the map data storage unit 106, or after starting the route guidance, the map data necessary for route guidance could not be transferred by reproducing the content information of the DVD disc 200, etc. In some cases, during route guidance, route map block data used for route guidance is stored in the map data storage unit 106. If no, during the induction the route, and is adapted to transfer the map data storage unit 106 the block map data to be used for route guidance from the DVD disk 200.

  For example, as shown in FIG. 6, when the block map data for all routes is not stored in the map data storage unit 106 as described above, the vehicle travels on the set route and the travel time predicted in advance. When the time has elapsed, the system control unit 115, as shown in FIG. 7, displays route map block data and surrounding map block data (hereinafter referred to as route) in a predetermined geographical range of a route to a destination that has not yet been transferred. This operation is repeated and all route map block data in the route to the destination is transferred as shown in FIG.

  In the present embodiment, as described above, when the block map data on the route to the destination not yet transferred by the system control unit 115 is transferred, the block map data including the route that has already passed is discarded. It is like that.

  In addition, when the predicted traveling time has elapsed after the start of route guidance, the DVD disk 200 on which block map data including a route set by reproduction of content information or the like is recorded is not stored in the DVD drive 105. In this case, the system controller 115 waits for the insertion of the DVD disk 200 to transfer the block map data.

  In this case, for example, when the route map block data used for route guidance disappears in the map data storage unit 106, as shown in FIG. 9, the DVD disc 200 is inserted after the DVD disc 200 is inserted. The route map block data etc. are transferred from.

  Next, the transfer operation of the map data stored in the map data storage unit 106 will be described using FIG.

  FIG. 10 is a flowchart showing a transfer operation for transferring the map data of this embodiment to the map data storage unit 106.

  In this transfer operation, it is assumed that the navigation device 100 has already been activated, and that the DVD disc 200 having block map data corresponding to the set route has already been stored in the DVD disc drive 105. .

  First, when a route to a destination is set by a user operation or the like, the system control unit 115 starts route guidance for the vehicle based on block map data including the departure point of the vehicle (step S11).

  Next, the system control unit 115 acquires route data within a preset range (hereinafter referred to as route data) (step S12).

  In this step S12, the set range of the route data is determined based on at least one of the current position of the vehicle, the block map data indicating the position of the vehicle, or the scale of the block map data acquired last time. For example, in the present embodiment, the system control unit 115 acquires the route data included in the route map block data next to the block map data currently being routed as the setting range.

  Note that the present invention is not limited to this, and the system control unit 115 may acquire route data including the next several route map block data as a setting range.

  Next, the system control unit 115 determines route map block data, route map block data that is surrounding map block data, and the like based on the acquired route data (step S13).

  Specifically, as described above, the block map data including the set route is determined as the route map block data, and the surrounding map block data is determined based on the route map block data and the transfer conditions described above.

  Further, in principle, the system control unit 115, as described above, identifies the route map block data and the identification numbers (hereinafter referred to as block IDs) of nine surrounding map block data around the route map block map data. In the case of route map block data having the above transfer conditions, the route map block data and the surrounding map blocks are increased or decreased based on the transfer conditions to increase or decrease the block map data around the route map block map data. The block ID of data is determined.

  For example, the system control unit 115 determines the type of the route included in the route map block data, whether the route included in the route map block data is an expressway, whether there is an entrance / exit of the expressway in the route map block data, and the route map Determine whether there is a destination or waypoint in the block data, and also determine the amount of route map block data and management data, the amount of data that can be stored in the map data storage unit, and whether the route map block data to be transferred It is determined whether or not the block ID of the surrounding map block data is determined.

  Note that the system control unit 115 may determine peripheral map block data uniformly without determining the above transfer conditions, and may determine the block ID of the block map data.

  Next, the system control unit 115 optimizes the determined block ID in an order suitable for the order of the block map data recorded on the DVD disc 200 (step S14).

  Specifically, the system control unit 115 is configured such that when one block map data overlaps with the route map block data and the surrounding map block data, or as the surrounding map data of the route map block data with different one block map data. If determined, optimization is performed so that one block map data is not transferred separately. In addition, the system control unit 115 optimizes the block map data acquisition process by rearranging the block IDs based on the recording order of the block map data of the DVD disc storing the block map data to be transferred.

  In this process, the block IDs are stored in the ROM / RAM 116 in the optimized order after the determined order of the block IDs is optimized.

  Next, the system control unit 115 transfers block map data from the DVD disk 200 to the map data storage unit 106 based on the optimized block ID (step S15).

  Next, the system control unit 115 determines whether or not the block map data can be stored in the map data storage unit 106 (step S16).

  For example, as described above, when there is no area for storing the block map data in the map data storage unit 106 such as when the route from the current position to the destination is a long distance, or the route map block data The system control unit 115 makes this determination when all the determined route map block data or the like is not transferred, such as when the DVD disk 200 storing the etc. is taken out. Whether the stored block map data fits in the map data storage unit 106, or whether the DVD disk 200 storing the route map block data or the like is taken out by the user during the transfer operation of the route map block data. Judging.

  Next, when the system control unit 115 determines that the block map data can still be stored in the map data storage unit 106, the system control unit 115 further determines whether or not all route map block data has been transferred. (Step S17) When it is determined that all route map block data has been transferred, this operation is terminated, while the system control unit 115 determines that all route map block data has not been transferred. Return to step S12.

  For example, in this embodiment, the system control unit 115 determines whether or not the block map data for all routes is stored by determining whether or not the route map block data including the destination has been transferred. It is like that.

  When the system control unit 115 determines that all the route map block data has been transferred and ends this operation, the system control unit 115 controls each unit and transfers the transferred route map block data. Based on the above, the route guidance is continued.

  On the other hand, when the system control unit 115 determines that the block map data cannot be stored in the map data storage unit 106, the system control unit 115 controls each unit and transfers the route map block data and the surrounding map blocks that are transferred. The route guidance is continued based on the data, the block map data transfer operation is interrupted (step S18), and the following operation is performed after elapse of a preset time such as the elapse of the travel time described above.

  First, the system control unit 115 determines whether or not the DVD disk 200 storing the block map data of the route set in the DVD disk drive 105 is stored (step S19), and the DVD disk 200 is stored. If it is determined that it is not, the display unit 110 or the like prompts the user to insert the DVD disc 200 in which the block map data of the set route is recorded, and waits for the DVD disc 200 to be inserted (step). S20).

  The system control unit 115 performs route guidance based on the route map block data already recorded in the map data storage unit 106, but the route map block data already recorded in the map data storage unit 106. When the use of the route is completed, the route guidance process is also suspended.

  Even when the route guidance process is suspended and waited, as described later, when the transfer operation of route map block data or the like is resumed by inserting the DVD disk 200, the system control unit 115 Restarts the route guidance on condition that sufficient route map block data has been stored to start the route guidance.

  Next, when the DVD disc 200 is inserted and the system control unit 115 determines that the DVD disc 200 is inserted, the process goes to step S22 (step S21).

  On the other hand, when the system control unit 115 determines that the DVD disk 200 in which the block map data of the set route is recorded has already been stored, the system control unit 115, as described above, The vehicle position is acquired from the travel data output from the vehicle etc. (step S22).

  Next, the system control unit 115 determines the position of the host vehicle on the route set based on the acquired host vehicle position, the discarded data of the block map data stored in the map data storage unit 106, and the data thereof. (Hereinafter, this process is simply referred to as data check (step S23)).

  Next, the system control unit 115 determines whether there is data to be discarded of the block map data stored in the map data storage unit 106 (step S24), and if there is no block map data to be discarded by the system control unit 115. If it is determined, the process directly goes to step S12. If the system control unit 115 determines that there is block map data to be discarded, the discarded block map data is discarded (step S25), and the process proceeds to step S12. Go and repeat the transfer operation.

  In step S16, if the map data storage unit 106 does not have an area for transferring all route map block data and the like, and the system control unit 115 determines that there is no block map data to be discarded. Going to step S22, the host vehicle position is acquired from the travel data output from the GPS receiver 101 and the like, and this process is repeated until a block map data that can be discarded is detected.

  As described above, in the transfer operation of the route map block data, when not all route map block data etc. are transferred in the set route, the set route is changed as shown in FIGS. When the vehicle travels and the predicted time has passed, the block map data on the route to the destination that has not yet been transferred can be transferred and route guidance can be performed. Even when the map data storage unit 106 is lost, as shown in FIG. 9, after waiting for the insertion of the DVD disc 200, the route map block data and the like are transferred from the point where the DVD disc 200 is inserted, and the route is stored. Guidance can be performed.

  As described above, in the present embodiment, the GPS receiving unit 101 and the sensor unit 102 that acquire the current position of the vehicle, and the DVD disk 200 on which the map data is recorded are mounted, and at least the recorded map data is read. A system control unit 115 that registers a destination to be reached by the vehicle and sets a route to the destination based on the acquired current position, the registered destination and map data, and based on the set route A map data storage unit 106 for storing map data for guiding the route of the vehicle, and the system control unit 115 is set in advance including the searched route based on the current position of the vehicle and the set route. The map data having a geographical range is transferred from the DVD disc 200 to the map data storage unit 106.

  With this configuration, in the present embodiment, in the navigation device having a player that reproduces the DVD disc 200 that is a portable recording medium for storing map data, map data used for route guidance is stored in the map data storage unit 106 after route setting. Even if the DVD disk 200 storing the map data is exchanged with another medium and the DVD disk 200 storing the map data is taken out, route guidance or display of the current position of the vehicle is possible. Can be performed at a low cost and can be reduced in size.

  In the present embodiment, when the system control unit 115 transfers map data, the system control unit 115 determines a geographical range of the map data based on a preset transfer condition, and the map is based on the determined geographical range. Data is transferred from the DVD disk 200 to the map data storage unit.

  With this configuration, in this embodiment, the route to the destination to be reached by the vehicle is predicted in advance and re-established, and map data including roads that can become routes can be transferred in advance according to transfer conditions. Therefore, even if the route is re-searched and re-established due to traffic conditions such as traffic jams or traffic accidents, or sudden changes or additions to the waypoints by the user, new map data is newly created again. , And troublesome user operations such as when the DVD disk 200 in which map data is recorded in advance is not stored in the DVD disk drive 105 when the route is reset. Can be eliminated.

  In this embodiment, when re-searching / resetting the route to the destination, the system control unit 115 in principle uses the block map data already stored in the map data storage unit 106. In such a case, the set route clearly takes a long time to travel, or the set route distance is several tens of times greater than the linear distance from the starting point to the destination. In the case where the validity of the reset route is low, the block map data of this embodiment is stored on the condition that the DVD disk 200 in which the block map data is recorded is stored in the DVD disk drive 105. The transfer operation is performed from the beginning, and when the above-mentioned block ID is determined, it is compared with the block map data already stored in the map data storage unit 106. It performed, so as to secure the high speed of the process of transferring block map data.

  In the present embodiment, the above-described navigation device 100 allows block map data to be transferred from the DVD disk to the map data storage unit. However, the DVD disk drive and the information recording medium for storing the block map data are used. The navigation device 100 having a computer and a recording medium, the above-described block map data transfer control program stored in the recording medium, and the computer executing the transfer operation similar to the above by reading the control program. May be.

  In the present embodiment, the interruption process is performed in step S18 of the block map data transfer operation, and the operation after the interruption process is performed after a preset traveling time has elapsed. Based on the stored route map block data and the block map data used for route guidance, the resumption of the transfer operation may be determined at all times.

  For example, in the present embodiment, when route map data or the like that has not yet been stored is transferred, the route map block data in a geographical range set in advance from the departure place, that is, the map data storage unit 106 is finally stored. Used route map data, the amount of route map block data used in route guidance and the surrounding map block data reached a predetermined amount, or the route map at the current position of the vehicle It may be determined whether or not the block data is lost.

It is a block diagram which shows schematic structure of the navigation apparatus which concerns on this application. It is a figure explaining the concept of the block which is a division unit of map data in this embodiment. It is a figure for demonstrating the transfer control in the system control part of this embodiment. It is a figure (I) for demonstrating the judgment of the appropriateness of the surrounding map block data to transfer in this embodiment. It is a figure (II) for demonstrating the judgment of the appropriateness of the surrounding map block data to transfer in this embodiment. It is a figure (I) which shows an example of route map block data etc. transferred by transfer operation of this embodiment. It is a figure (II) which shows examples, such as route map block data transferred by transfer operation of this embodiment. It is a figure (III) which shows examples, such as route map block data transferred by transfer operation of this embodiment. It is a figure (IV) which shows an example of the route map block data etc. which are transferred by the transfer operation of this embodiment. It is a flowchart which shows the transfer operation | movement which transfers the map data of this embodiment to a map data storage part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 ... Navigation apparatus 101 ... GPS receiving part 102 ... Sensor part 105 ... DVD disk drive 106 ... Map data storage part 115 ... System control part 200 ... DVD disk

Claims (6)

Obtaining means for obtaining the current position of the moving object;
A registration means for registering the destination;
Read means for reading at least the recorded map data by mounting a portable recording medium on which the map data is recorded,
Setting means for setting a route to the destination based on the acquired current position, the registered destination, and the map data;
Storage means capable of storing the map data;
Transfer means for determining a geographical range including the set route based on the set route, and transferring map data corresponding to the geographical range from the portable recording medium to the storage means;
Route guidance means for performing route guidance based on the set route;
With
When the portable recording medium is taken out from the readout means during the transfer operation of the map data corresponding to the geographical range by the transfer means,
The transfer means interrupts the transfer operation of the map data corresponding to the geographical range;
The navigation device characterized in that the route guidance means performs route guidance based on the map data transferred to the storage means until the transfer operation is interrupted.   If the portable recording medium is inserted into the reading means while the transfer operation is interrupted, the transfer means starts from the current position of the movable body when the portable recording medium is inserted. The navigation apparatus according to claim 1, wherein the map data to the destination point is transferred from the portable recording medium to the storage means. The route guidance means includes
When the use of the map data stored in the storage means is terminated when the portable recording medium is taken out from the reading means, the route guidance process is interrupted,
When the route guidance process is interrupted, the route guidance process is resumed when the portable recording medium is inserted into the reading means and the map data is transferred to the storage means. The navigation device according to claim 1. An acquisition step of acquiring the current position of the moving object;
A registration process for registering the destination;
A reading process of reading at least the recorded map data by mounting a portable recording medium on which the map data is recorded;
A setting step for setting a route to the destination based on the acquired current position, the registered destination, and the map data;
Based on the set route, a geographical range including the set route is determined, and map data corresponding to the geographical range is transferred from the portable recording medium to a storage means capable of storing the map data. And a transfer process
A route guidance step for performing route guidance based on the set route;
With
When the portable recording medium is removed during the transfer operation of the map data corresponding to the geographical range by the transfer step,
In the transfer step, the transfer operation of the map data corresponding to the geographical range is interrupted,
In the route guidance step, a route guidance is performed based on the map data transferred to the storage means until the transfer operation is interrupted. A navigation program for guiding a route of a moving object by a computer,
The computer,
Acquisition means for acquiring the current position of the moving object;
Registration means to register the destination,
Read means for reading at least the recorded map data by mounting a portable recording medium on which the map data is recorded,
Setting means for setting a route to the destination based on the acquired current position, the registered destination, and the map data;
Based on the set route, a geographical range including the set route is determined, and map data corresponding to the geographical range is transferred from the portable recording medium to a storage means capable of storing the map data. Transfer means, and
Function as route guidance means for performing route guidance based on the set route,
further,
When the portable recording medium is taken out from the readout means during the transfer operation of the map data corresponding to the geographical range by the transfer means,
The transfer means interrupts the transfer operation of the map data corresponding to the geographical range;
The navigation program causing the route guidance means to function to perform route guidance based on the map data transferred to the storage means until the transfer operation is interrupted.   A recording medium in which the navigation program according to claim 5 is recorded in a computer-readable manner.

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