JP2003057040A - Navigation system, program for data recording method and read/write method and recording medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To lower a possibility that data recorded in a recording medium is damaged. SOLUTION: The navigation system comprises the recording medium which is arranged to be freely rotatable and on which a first recording region and a second recording region are set so as to be separated from each other, a read processing means 91 by which data for read recorded in the first recording region and data for read/write recorded in the second recording region are read out, a navigation processing means 93 by which a prescribed navigation processing operation is performed on the basis of the read-out data for read and the read-out data for read/write and a write processing means 92 by which the data for read/write is written in the second recording region. The data for read/write is not written in the first recording region.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a navigation device, a data recording method, a read / write method program, and a recording medium.

[0002]

2. Description of the Related Art Conventionally, in navigation devices,
The current position of the vehicle by the current location detection means, that is,
The current position is detected and the direction of the vehicle, that is,
A vehicle direction is detected, and a map screen is formed on the display of the display unit based on the map data and the like read from the data recording unit, and the current location, the vehicle direction, and the surrounding map are displayed on the map screen. It has become so. Also, the navigation device is used as a route search device,
When the operator, for example, the driver operates the input unit to set the destination, the route search processing is performed based on the search data read from the data recording unit, and the route from the current position to the destination is searched. Then, the searched route, that is, the searched route is displayed and guided on the map screen. Therefore, the driver can drive the vehicle according to the map or the searched route.

By the way, a recording medium such as a CD-ROM or a DVD-ROM is generally used as the data recording section, but the data recording section is required as the information provided to the driver increases. The recording capacity increases,
Not only is it difficult to secure a sufficient recording area, but the time required to read various data such as map data and search data becomes long.

In addition, point registration data for registering points used when setting a destination, radio wave beacons,
VI showing traffic information such as traffic congestion information and traffic regulations acquired through the communication unit by FM multiplex broadcasting, optical beacon, etc.
Although it is necessary to record CS data and data such as travel locus data acquired as the vehicle travels, the CD-ROM, DVD-ROM, etc. are read-only recording media. , CD the above data
-Cannot write to ROM, DVD-ROM, etc.,
The data is recorded in a RAM or the like having a small storage capacity provided inside the navigation device. Therefore, a sufficient amount of data cannot be recorded.

Therefore, a navigation device using a hard disk device capable of recording a sufficient amount of data as the data recording section is provided. In the hard disk device, a hard disk is used as a recording medium, and predetermined data can be read from or written in the hard disk by a magnetic head.

[0006]

However, in the above-mentioned conventional navigation device, when various data are written in the hard disk, vibration is generated along with traveling of the vehicle, and the vibration is generated in the hard disk device. If transmitted, the data may be corrupted.
Further, when the vibration is transmitted to the magnetic head, not only the sector in which writing is performed by the magnetic head but also the data recorded in the sector adjacent to the sector may be damaged. In that case, it is necessary to repair the damaged data, but the work for that is troublesome.

Therefore, in order to prevent data from being damaged due to vibration or the like, a navigation device is provided in which the power source of the hard disk device is turned off while the vehicle is traveling and the hard disk device is placed in a standby state. (See Japanese Patent Laid-Open No. 5-74038).

In this case, since the data is not written to the hard disk while the vehicle is traveling, the data will not be damaged, but the VICS data received during that time and the traveling locus acquired as the vehicle travels. Since data and the like cannot be recorded, it becomes impossible to constantly provide the driver with traffic information, a traveling locus, and the like.

The present invention solves the problems of the conventional navigation device and reduces the possibility of damaging the data recorded on the recording medium, a data recording method, and a read / write method. It is intended to provide the program and the recording medium of.

[0010]

To this end, in the navigation device of the present invention, a recording medium that is rotatably arranged and has first and second recording areas set separately from each other, and the first recording medium. Read processing means for reading the read data recorded in the second recording area and the read / write data recorded in the second recording area, and based on the read data and the read / write data read. A navigation processing means for performing a predetermined navigation processing;
And a write processing means for writing the read / write data in the recording area.

In another navigation device of the present invention, the first recording area is set on the first recording surface of the recording medium and the second recording area is set on the second recording surface.

[0012] In still another navigation device of the present invention, a plurality of the recording media are arranged, and a predetermined recording surface of the plurality of recording media is the first recording surface and the remaining recording surface is the first recording surface. 2 recording surface.

In still another navigation device of the present invention, the read / write data is set with a priority, and the data recording area is made different based on the priority.

In still another navigation device of the present invention, the priority is the importance of data.

In still another navigation device of the present invention, the priority is a writing frequency during traveling.

In the data recording method of the present invention, read data for setting the first and second recording areas which are separated from each other on the recording medium and for performing the predetermined navigation processing in the first recording area. , Read / write data for performing the navigation processing is recorded in the second recording area.

In the program of the read / write method of the present invention, the computers are separated from each other so that the first and second computers are separated from each other.
Read-out processing means for reading out the read-out data recorded in the first recording area and the read-out / write-in data recorded in the second recording area of the recording medium having the recording areas set therein. It functions as a navigation processing means for performing a predetermined navigation processing based on the read data and the read / write data, and a write processing means for writing the read / write data in the second recording area.

In the recording medium of the present invention, the first and second recording areas are set separately from each other, and the read data for performing the predetermined navigation processing is recorded in the first recording area, and the second recording area is recorded. The read / write data for performing the navigation processing is recorded in the recording area of.

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a functional block diagram of a navigation device according to the first embodiment of the present invention.

In the figure, 52 is a rotatably arranged hard disk as a recording medium in which first and second recording areas are set by being separated from each other, and 91 is the first hard disk.
Read processing means for reading the read data recorded in the recording area and the read / write data recorded in the second recording area, and 93 for the read data and the read / read data.
Navigation processing means for performing a predetermined navigation processing based on the write data, and 92 is a write processing means for writing the read / write data in the second recording area.

FIG. 2 is a block diagram of the navigation device according to the first embodiment of the present invention.

In the figure, reference numeral 14 is a navigation device. The navigation device 14 is provided as a current location detection processing section 15 for detecting the current location and the like, a hard disk apparatus 16 as a data recording section, a computer, and as various processing means. Based on the information entered and working
The navigation processing unit 17 that performs various kinds of arithmetic processing such as navigation processing, the input unit 34 as an operating unit, the display unit 35 as a display unit, the voice input unit 36, the voice output unit 37, and the communication unit 38 are provided. The vehicle speed sensor 41 is connected to the processing unit 17.

The current position detection processing section 15 includes a GPS (Global Positioning System) 21, a geomagnetic sensor 22, and a distance sensor 2 as current position detecting means.
3, a steering sensor 24, a gyro sensor 26, an altimeter (not shown), and the like.

The GPS 21 detects the current position on the earth by receiving the radio wave generated by the artificial satellite, and the geomagnetic sensor 22 detects the vehicle direction by measuring the geomagnetism, and the distance sensor. Reference numeral 23 detects the distance between predetermined positions on the road. Examples of the distance sensor 23 include one that measures the rotation speed of a wheel (not shown) and detects the distance based on the rotation speed, one that measures the acceleration, and that integrates the acceleration twice to detect the distance. Can be used.

The steering sensor 24 detects the steering angle, and the steering sensor 24 is:
For example, an optical rotation sensor, a rotation resistance sensor attached to a rotating portion of a steering wheel (not shown),
An angle sensor or the like attached to the wheel is used.

The gyro sensor 26 detects the vehicle azimuth based on the rotational angular velocity of the vehicle, that is, the turning angle. As the gyro sensor 26, for example, a gas rate gyro, a vibration gyro or the like is used.

The GPS 21 can detect the current position independently. Then, by combining the distance detected by the distance sensor 23 with the vehicle direction detected by the geomagnetic sensor 22, the steering angle detected by the steering sensor 24, or the turning angle detected by the gyro sensor 26, the present position is determined. It can also be detected. In this case, the distance sensor 23, the geomagnetic sensor 22, the steering sensor 24, or the gyro sensor 26.
The present location detection means is constituted by and.

The hard disk device 16 is a hard disk 52 (FIG. 1) as an external recording medium provided outside the navigation processing unit 17, and various data is read from the hard disk 52 and various data is stored in the hard disk 52. And a magnetic head (not shown) as a read / write device for writing data. In the present embodiment, the hard disk 52 is
As a magnetic disk is being used as
A magnetic drum may be used instead of the magnetic disk.

The hard disk 52 has a map data file, a road data file, an intersection data file, a node data file, a search data file,
It has a database consisting of guide data files and facility data files.

In the map data file, map data representing the shape of roads, facility names, etc. for displaying a map on a map screen set on a display (not shown) of the display unit 35 is recorded. In addition, road data regarding roads is recorded in the road data file.
Distribution, cant, bank, condition of road surface, number of lanes on the road, points where the number of lanes decreases, points where the width becomes narrower. For corners, radius of curvature, intersection, T-shaped road, corner entrance, etc. The attributes include downhill roads and uphill roads, and the road types include national roads, general roads, and highways. The road data also represents railroad crossings, expressway ramp ways, expressway toll gates, and the like.

Further, the intersection data file records the intersection data relating to each intersection, the node data file records the node data of each node forming each road, and the position and shape of the road are determined by the node data. expressed. Therefore, the node data is composed of data indicating road branch points (including intersections, T-junctions, etc.), nodes, links connecting each node, etc., and a node number for each node is assigned to each link. A link number is attached.

Then, the search data file records road data, intersection data, etc. for searching for a route, and the guide data file displays a guide map along the searched route or displays an intersection or a searched route. Characteristic pictures of
Various kinds of guidance data for displaying a frame map, a distance to the next intersection, a traveling direction at the next intersection, and other guidance information are recorded.
Further, in the facility data file, facility data representing information on a facility such as a hotel, a gas station, a parking lot, and a tourist spot guide (for example, name, address, telephone number, position coordinate, etc.) is recorded.

Further, in the hard disk 52, spot registration data for registering spots used when setting a destination and the like, VICS data such as traffic information obtained through the communication unit 38, and the like. Communication information data of the facility acquired through the communication unit 38 (information on the newly created facility (name, address, telephone number, position coordinates, etc.), business day and business hours of the facility, and the like are changed in real time. However, information that cannot be recorded in advance), travel locus data acquired as the vehicle travels, voice output data for outputting predetermined information by the voice output unit 37, and the like are also recorded.

The navigation processing unit 17 is a CPU 31 as a main control unit for controlling the entire navigation device 14, a RAM 32 used as a working memory when the CPU 31 performs various arithmetic processes,
And a control program, and a ROM 33 in which various programs for performing a route search to a destination and guidance on the searched route, that is, route guidance and the like are recorded. The input unit 34, the display unit 35, the voice input unit 36, the voice output unit 37, and the communication unit 38 are connected. The RAM3
2. The ROM 33 and the like constitute an internal recording medium arranged in the navigation processing unit 17.

The RAM 32 and the ROM 33 are composed of a magnetic core, a semiconductor memory and the like which are not shown.
In addition to the hard disk 52, a magnetic tape, a flexible disk, a CD, a MD, a DVD, an optical disk, an MO card, an IC card, an optical card, a memory card or the like for recording predetermined information as another external recording medium. Can also be used to connect to the navigation processor 17.

In the present embodiment, the ROM 33
Various programs are recorded in the hard disk 5
Although various data are recorded on the hard disk 52, the program can be recorded on the hard disk 52 or the program, data, etc. can be recorded on another external recording medium. In this case, the program, data, etc. are read from another external recording medium and written to the hard disk 52, or, for example, a flash memory (not shown) is provided in the navigation processing unit 17, and the other external The program from a recording medium,
Data and the like can be read and written in the flash memory. Therefore, the programs, data, etc. can be updated by exchanging another external recording medium. Further, in the vehicle in which the automatic transmission control such as the traveling control and the corner control is performed based on various data recorded in the hard disk 52,
A program for controlling the automatic transmission and the like can also be recorded in the other external recording medium. In this way, it is possible to activate programs recorded in various recording media and perform various processes based on the data.

Further, the communication section 38 is for transmitting and receiving various programs, data and the like to and from an FM multiplex broadcasting transmitter, a telephone line, a communication line, etc., for example, a teleterminal (not shown). In addition to traffic information including traffic congestion information, regulation information, parking lot information, and the like, various VICS data such as traffic accident information and D-GPS information for detecting a detection error of the GPS 21 are received. To that end, the communication unit 38 includes a receiver, a transmitter, a beacon sensor, and the like. The beacon sensor receives various VICS data and the like in addition to position information from radio beacons, optical beacons and the like arranged along the road.
The beacon sensor constitutes the present location detecting means.

Further, other programs, data, etc. for operating the navigation device 14 are stored in the information center (Internet server, navigation server, etc.).
From multiple base stations (Internet provider terminals,
To the communication unit 38 connected to the communication unit 38 via a telephone line, a communication line, etc., and further, from each base station to the communication unit 3
8 can also be sent. In that case, when at least a part of the program, data, etc. transmitted from each base station is received by the communication unit 38, the CPU 31
For example, download to RAM 32, flash memory, hard disk 52, etc., start the program,
Various processes are performed based on the data. Note that the program and the data are recorded on different recording media,
It is also possible to record on the same recording medium.

Further, by using a home-use personal computer, the programs, data and the like transmitted from the information center are downloaded to an external recording medium such as a memory card or a flexible disk which is detachable from the personal computer, It is also possible to start a program and perform various processes based on the data.

The input unit 34 comprises operation keys such as operation keys displayed as images on the screen set on the display, and operation switches such as an operation menu. The navigation device is operated by pressing (touching) the operation switches. Various functions of 14 can be selected, the current position at the start of traveling can be corrected, and the destination can be set.
As the input unit 34, a keyboard, a mouse, a bar code reader, a light pen, which is provided separately from the display unit 35,
It is also possible to use a remote control device or the like for remote operation.

Various screens are formed on the display, and an operation guide, an operation menu, a route from the present location to a destination, guidance information along the route, etc. are displayed on each screen. As the display unit 35, a display such as a CRT display, a liquid crystal display or a plasma display can be used, or a hologram device that projects a hologram on the windshield can be used.

The voice input unit 36 is composed of a microphone (not shown) or the like, and can input necessary information by voice. Furthermore, the audio output unit 37
Is provided with a voice synthesizer and a speaker (not shown), and outputs sound information, for example, guide information composed of voices synthesized by the voice synthesizer, gear shift information, and the like from the speaker.
In addition to the voice synthesized by the voice synthesizer,
It is also possible to output various sounds and various guidance information recorded in advance on a tape, a memory or the like from a speaker.

Next, the navigation device 14 having the above structure
The operation of will be described.

First, the navigation processing means 93 of the CPU 31 performs navigation processing. That is,
The information acquisition processing means (not shown) of the navigation processing means 93 performs information acquisition processing, reads and acquires map data, road data, intersection data, node data, etc. from the hard disk 52, and the navigation processing means 9
Display processing means (not shown) of 3 performs display processing, and G
Current location detected by PS21, gyro sensor 2
The vehicle direction detected by 6 and the map data, road data, intersection data, node data and the like acquired by the information acquisition processing means are read, a map screen is formed on the display, and the current position and the self are displayed on the map screen. Display the car direction and a map of the surrounding area.

When the navigation device 14 is used as a route search device, when the operator, for example, the driver operates the input section 34 to set the destination, the information acquisition processing means causes the information acquisition processing means to search data. The route search processing means (not shown) of the navigation processing means 93 performs route search processing to obtain the current location,
The search data and the like are read, and a route from the current position to the destination is searched based on the destination, the current position, and the search data.

Further, the display processing means displays the present location, the surrounding map and the searched route on the map screen. Therefore, the driver can drive the vehicle according to the searched route. Also, the navigation processing means 93
The route guidance processing means (not shown) performs route guidance processing, and the voice output unit 37 guides the searched route. In addition, the running locus data creation processing means (not shown) of the navigation processing means 93 performs running locus data creation processing, and creates running locus data based on the current position when the vehicle is running, the vehicle direction, etc. Hard disk 5
Write to 2 and record.

In the present embodiment, the information acquisition processing means is designed to read and acquire information such as map data, road data, intersection data, node data, etc. from the hard disk 52, but via the communication section 38. It is also possible to obtain the above information.

By the way, the navigation device 14
Is used as an information display device for displaying traffic information and the like transmitted from the teleterminal.

In this case, the traffic information is edited into a packet for each piece of information such as traffic jam information, regulation information, parking lot information, etc., and is put on a medium such as a radio wave beacon, FM multiplex broadcast, optical beacon, etc. Sent from the terminal,
It is received by the communication unit 38 when the vehicle is located in the FM multiplex broadcasting area, when the vehicle passes directly under the radio wave beacon or the optical beacon, and the like. And, for example,
The traffic jam determination processing means (not shown) of the navigation processing means 93 performs traffic jam determination processing, determines whether or not traffic congestion has occurred for each link based on the link information relating to the link in the traffic information, and determines whether the traffic congestion has occurred. When it has occurred, the display processing means displays a traffic jam arrow indicating that a traffic jam is occurring along the road on the map screen based on the link information.

Next, the hard disk device 16 will be described.

FIG. 3 is a schematic diagram of a hard disk device according to the first embodiment of the present invention.

In the figure, 16 is a hard disk device,
Reference numeral 49 is a case, and 51 is a shaft of a spindle motor (not shown) as a disk drive motor, and the shaft 51 rotatably supports at least one hard disk 52. The hard disk 52 can be rotated at a constant rotation speed by driving the spindle motor. When a plurality of hard disks are used, each hard disk is arranged at a predetermined interval via a spacer (not shown). The hard disk 52 is made of a hard magnetic medium, and a thin magnetized film is coated on the front and back surfaces of a disk prototype made of precision glass or an aluminum alloy by applying means such as coating, plating and vapor deposition.

The access arm 53 is provided with a shaft 54 so as to face the front surface and the back surface of the hard disk 52.
And a read / write magnetic head 55 is attached to the tip of the access arm 53, and the magnetic head 55 is placed at a predetermined position on the front surface or the back surface of the hard disk 52. As a result, the data recorded on the hard disk 52 can be read or the data can be written on the hard disk 52 by a predetermined read / write method. The magnetic heads 55 are arranged on the front surface and the back surface of the hard disk 52, and the access arms 53 are attached to the shaft 54 at the same position. Therefore, the magnetic heads 55 are placed at the same position on the hard disk 52. .

In order to swing the hard disk 52 to perform a seek operation, a voice coil motor 56 as an arm motor is arranged adjacent to the shaft 54, and by driving the voice coil motor 56, The magnetic head 55 is provided on a predetermined track of a plurality of tracks formed concentrically on the hard disk 52 and on a predetermined sector of a plurality of sectors formed by dividing each track. Can be placed.

When data is read by the magnetic head 55, the output generated by the magnetic head 55 is amplified by the amplifier circuit 57.

On the back surface of the case 49, various electronic components (not shown) are mounted on a substrate (not shown) to form a disk controller. Therefore, by operating the disk control device, position control for placing the magnetic head 55 at a predetermined position on the hard disk 52,
Data is read and written by the magnetic head 55. Further, the disk controller selects one of the magnetic heads 55 to read and write data.

The disk control device is provided with read processing means 91 (FIG. 1) for reading data and write processing means 92 for writing data.

By the way, when various data are written in the hard disk 52, vibration is generated along with traveling of the vehicle, and the vibration is generated in the hard disk device 16.
If it is transmitted to, the data may be damaged.
Further, when the vibration is transmitted to the magnetic head 55, not only the sector in which writing is performed by the magnetic head 55 but also the data recorded in the sector adjacent to the sector may be damaged.

Therefore, various data recorded on the hard disk 52 are classified according to the type, and the hard disk 5
The recording area for recording data in 2 is divided.

FIG. 4 is a diagram showing the surface of the hard disk according to the first embodiment of the present invention, FIG. 5 is a diagram showing the data structure of the surface of the hard disk according to the first embodiment of the present invention, and FIG. FIG. 7 is a diagram showing the back surface of the hard disk in the first embodiment of the invention, and FIG. 7 is a diagram showing the data structure of the back surface of the hard disk in the first embodiment of the present invention.

In this embodiment, in one hard disk 52, areas ARa1 and ARa2 extend from the inner peripheral edge side to the outer peripheral edge side of the surface as the first recording surface.
However, areas ARb1 to ARb3 are set from the inner peripheral edge side to the outer peripheral edge side of the back surface as the second recording surface, and the area A
Management data for representing the format of the hard disk 52 is recorded in Ra1 and ARb1. Further, the area ARa2 is used as a first recording area, and reading data which is exclusively read but not written in the area ARa2, for example, map data, road data, intersection data, node data, search. Data, guidance data, facility data, etc. are recorded. The area ARb2 is used as a second recording area, and read / write data to be read and written, such as spot registration data, VICS data, communication information data, travel locus data, etc., is used in the area ARb2. Will be recorded. In addition, the area ARa2,
Several sectors on the inner peripheral edge of the area ARb2 are set as a user area, and a data label indicating a data number, a data type, etc. are recorded in the user area. Also, the area AR
b3 is an empty area.

Then, the read processing means 91 (FIG. 1)
Performs read processing to read map data, road data, intersection data, node data, search data, guidance data, facility data, etc. from the area ARa2,
Point registration data, VICS data, communication information data, travel locus data, etc. are read from the area ARb2. Further, the writing processing means 92 performs a writing process to write the spot registration data, VICS data, communication information data, travel locus data, etc. in the area ARb2.

As described above, since the read data is recorded in the area ARa2 and the read / write data is recorded in the area ARb2, the read / write data is not written in the area ARa2. Therefore, even if vibration occurs due to traveling of the vehicle or the like, the read data recorded in the area ARa2 is not damaged. Further, when the read / write data is written in the area ARb2, if the vibration occurs as the vehicle travels, the read / write data recorded in the area ARb2 may be damaged. , The read / write data can be easily acquired and rewritten.

Therefore, the possibility that the data recorded on the hard disk 52 will be damaged can be reduced.

Since it is not necessary to turn off the power source (not shown) of the hard disk device 16 while the vehicle is running,
Information such as VICS data that needs to be recorded even during traveling can be recorded, and traffic information and the like can be constantly provided to the driver.

In the present embodiment, the read data is recorded on the front surface of the hard disk 52 and the read / write data is recorded on the rear surface, but the read / write data is recorded on the front surface. It is also possible to record the read data in the. When a plurality of hard disks are mounted on the hard disk device 16, read data can be recorded for each hard disk or read / write data can be recorded. Further, it is possible to record the read data on the front surface or the back surface of a predetermined hard disk of each hard disk and record the read / write data on the remaining surface.

Next, a second embodiment of the present invention will be described.

FIG. 8 is a diagram showing the surface of a hard disk according to the second embodiment of the present invention, FIG. 9 is a diagram showing the data structure of the surface of the hard disk according to the second embodiment of the present invention, and FIG. The figure which shows the back surface of the hard disk in the 2nd Embodiment of this invention, FIG. 11:
6 is a diagram showing a data structure of the back surface of the hard disk in the embodiment of FIG.

In this case, the priority for protecting the data is set based on the importance of the difficulty of restoration when the data is damaged, the priority of the data of high importance is set to be high, and the importance of The priority of low data is set low. It should be noted that point registration data, travel locus data, etc. are difficult and difficult to recover when data is damaged, and VICS data, communication information data, etc., are repaired by receiving again when damaged. Because it can be done, its importance is low.

By the way, the hard disk 52 is shaken as it is rotated, but the shake is greater on the side farther from the rotation center of the hard disk 52, that is, the larger it is in the radial direction outward, and the closer to the rotation center, that is, the radial direction. Since the inner side is smaller, the possibility that the data will be damaged when writing various data to the hard disk 52 due to the traveling of the vehicle or the like and the data will be damaged is higher in the outer side in the radial direction.
It is lower in the radial direction. Therefore, data of high importance is recorded inward in the radial direction, and data of low importance is recorded outward in the radial direction.

That is, in one hard disk 52, areas ARa11 and ARa12 are formed from the inner peripheral edge side to the outer peripheral edge side of the back surface as the second recording surface from the inner peripheral edge side to the outer peripheral edge side of the front surface as the first recording surface. The areas ARb11 to ARb14 are set to the area ARa1
1, management data is recorded in ARb11. The area ARa12 is used as a first recording area, and the reading data, for example, map data, road data, intersection data, node data, search data, guidance data, facility data, etc. are recorded in the area ARa12. It The area ARb12 is used as a second recording area, and, for example, point registration data, travel locus data, and the like are recorded in the area ARb12 as highly important data among the read / write data. The area ARb13 is
The area ARb14, which is a free area, is used as a second recording area. In the area ARb14, as data of low importance among the read / write data, for example, VI
CS data, communication information data, etc. are recorded.

Then, the read processing means 91 (FIG. 1)
Performs read processing to read map data, road data, intersection data, node data, search data, guidance data, facility data, etc. from the area ARa12,
Point registration data, travel locus data, etc. are read from the area ARb12, and VICS data, communication information data, etc. are read from the area ARb14. Also, the write processing means 92
Performs a writing process to store the spot registration data, the traveling locus data and the like in the area ARb12 and the VI in the area ARb14.
CS data, communication information data, etc. are written.

As described above, since the read / write data of high importance is recorded in the area ARb12 in which the shake generated by the rotation of the hard disk 52 is small, the area A
When the read / write data is written in the Rb 12, even if vibration occurs due to traveling of the vehicle, the area AR
It is possible to prevent the read / write data recorded in b12 from being damaged. Further, when the read / write data is written in the area ARb14 in which the shake generated by the rotation of the hard disk 52 is large, when the vibration occurs as the vehicle travels, the read / write recorded in the area ARb14. If the embedded data may be damaged,
The write data is of low importance and is easy to repair when damaged.

Therefore, the possibility that the data recorded on the hard disk 52 will be damaged can be reduced.

Since it is not necessary to turn off the power source (not shown) of the hard disk device 16 (FIG. 2) while the vehicle is traveling, it is possible to record information such as VICS data that needs to be recorded during traveling. , It is possible to provide the driver with traffic information at all times.

In the present embodiment, the read data is recorded on the front surface of the hard disk 52 and the read / write data is recorded on the rear surface, but the read / write data is recorded on the front surface. It is also possible to record the read data in the. When a plurality of hard disks are mounted on the hard disk device 16, read data can be recorded for each hard disk, or read / write data can be recorded. Furthermore, read data is read on the front surface or the back surface of a predetermined hard disk of each hard disk.
Read / write data may be recorded on the remaining surface.

Next, a third embodiment of the present invention will be described.

FIG. 12 is a diagram showing the surface of a hard disk in the third embodiment of the present invention, FIG. 13 is a diagram showing the data structure of the surface of the hard disk in the third embodiment of the present invention, and FIG. 14 is a book. FIG. 15 is a diagram showing the back surface of a hard disk according to the third embodiment of the invention, and FIG. 15 is a diagram showing the data structure of the back surface of the hard disk according to the third embodiment of the present invention.

By the way, since vibration is generated as the vehicle travels, there is a high possibility that data will be damaged during traveling. Therefore, the priority for protecting data is set based on the frequency of writing during traveling, that is, the writing frequency, and the priority of data with high writing frequency during traveling is set to be high. Data having a low writing frequency is set to have a low priority. Note that, for example, VICS data received by passing directly under a radio wave beacon or an optical beacon, travel locus data acquired as the vehicle travels, and the like are often written during travel, so Writing frequency is high. Also,
For example, location registration data, which is registered as a registration location by a driver and registered as registration location, facility communication information data, etc. are usually written by the driver's operation while the vehicle is stopped. Since it is rarely written inside, the frequency of writing during traveling is low.

Therefore, data having a high writing frequency during traveling is recorded inward in the radial direction, and data having a low writing frequency during traveling is recorded outward in the radial direction.

That is, in one hard disk 52, areas ARa21 and ARa22 are formed from the inner peripheral edge side to the outer peripheral edge side of the back surface as the second recording surface from the inner peripheral edge side to the outer peripheral edge side of the front surface as the first recording surface. The areas ARb21 to ARb24 are set to the area ARa2
1, management data is recorded in ARb21. The area ARa22 is used as a first recording area, and the reading data, for example, map data, road data, intersection data, node data, search data, guidance data, facility data, etc. are recorded in the area ARa22. It The area ARb22 is used as a second recording area, and in the area ARb22, data that is frequently written during traveling of the read / write data, for example, VIC is used.
S data, travel locus data, etc. are recorded. The area ARb23 is a free area, and the area ARb24 is
The area ARb24 is used as a second recording area.
In the read / write data, for example, location registration data, communication information data, and the like are recorded as data having a low writing frequency during traveling.

Then, the read processing means 91 (FIG. 1)
Performs read processing to read map data, road data, intersection data, node data, search data, guidance data, facility data, etc. from the area ARa22,
VICS data, travel locus data, etc. are read from the area ARb22, and spot registration data, communication information data, etc. are read from the area ARb24. Also, the write processing means 92
Performs a writing process to write VICS data, traveling locus data, etc. in the area ARb22, and spot registration data, communication information data, etc. in the area ARb24.

As described above, since the read / write data having a high write frequency during traveling is recorded in the area ARb22 in which the shake caused by the rotation of the hard disk 52 is small, the data is written in the area ARb22. Even if vibration is generated while the vehicle is running, etc.
It is possible to prevent the read / write data recorded in the Rb 22 from being damaged. In addition, since the read / write data that is written infrequently during traveling is recorded in the area ARb24 in which the shake generated by the rotation of the hard disk 52 is large, when the read / write data is being written. Vibration is less likely to occur in the area ARb24
The read / write data recorded in is less likely to be damaged.

Therefore, the possibility that the data recorded on the hard disk 52 will be damaged can be reduced.

Since it is not necessary to turn off the power source (not shown) of the hard disk device 16 (FIG. 2) while the vehicle is traveling, VICS data and the like can be constantly received and recorded, and the driver can be informed of traffic information and the like. Can be provided at all times.

In this embodiment, the read data is recorded on the front surface of the hard disk 52 and the read / write data is recorded on the rear surface thereof. However, the read / write data is recorded on the front surface of the hard disk 52. It is also possible to record the read data in the. When a plurality of hard disks are mounted on the hard disk device 16, read data can be recorded for each hard disk, or read / write data can be recorded. Furthermore, read data is read on the front surface or the back surface of a predetermined hard disk of each hard disk.
Read / write data may be recorded on the remaining surface.

The present invention is not limited to the above-mentioned embodiments, but can be variously modified within the scope of the present invention, and they are not excluded from the scope of the present invention.

[0089]

As described in detail above, according to the present invention, the read data is recorded in the first recording area and the read / write data is recorded in the second recording area. The read / write data is not written in the recording area of.
Therefore, even if vibration occurs due to running of the vehicle,
The read data recorded in the first recording area will not be damaged.

Further, since it is not necessary to turn off the power source of the data recording unit while the vehicle is traveling, it is possible to record information such as VICS data which needs to be recorded even while the vehicle is traveling, so that the driver can get traffic information. Etc. can be provided at all times.

[Brief description of drawings]

FIG. 1 is a functional block diagram of a navigation device according to a first embodiment of the present invention.

FIG. 2 is a block diagram of the navigation device according to the first embodiment of the present invention.

FIG. 3 is a schematic diagram of a hard disk device according to the first embodiment of the present invention.

FIG. 4 is a diagram showing a surface of a hard disk according to the first embodiment of the present invention.

FIG. 5 is a diagram showing a data structure of a surface of a hard disk according to the first embodiment of the present invention.

FIG. 6 is a diagram showing a back surface of the hard disk according to the first embodiment of the present invention.

FIG. 7 is a diagram showing a data structure of the back surface of the hard disk according to the first embodiment of the present invention.

FIG. 8 is a diagram showing a surface of a hard disk according to a second embodiment of the present invention.

FIG. 9 is a diagram showing a data structure of a surface of a hard disk according to the second embodiment of the present invention.

FIG. 10 is a diagram showing a back surface of a hard disk according to a second embodiment of the present invention.

FIG. 11 is a diagram showing a data structure of the back surface of a hard disk according to the second embodiment of the present invention.

FIG. 12 is a diagram showing a surface of a hard disk according to a third embodiment of the present invention.

FIG. 13 is a diagram showing a data structure of a surface of a hard disk according to the third embodiment of the present invention.

FIG. 14 is a diagram showing a back surface of a hard disk according to a third embodiment of the present invention.

FIG. 15 is a diagram showing a data structure of the back surface of a hard disk according to the third embodiment of the present invention.

[Explanation of symbols]

14 navigation device 17 navigation processing unit 52 hard disk 91 reading processing means 92 writing processing means 93 navigation processing means ARa2, ARa12, ARa22, ARb2, ARb
12, ARb14, ARb22, ARb24 regions

Claims (9)

[Claims] 1. A recording medium that is rotatably arranged and has first and second recording areas set separately from each other, read data recorded in the first recording area, and a second recording medium. Read processing means for reading the read / write data recorded in the recording area; and navigation processing means for performing a predetermined navigation processing based on the read read data and read / write data. 2. A navigation device, comprising: a write processing unit for writing read / write data in the second recording area. 2. The navigation device according to claim 1, wherein the first recording area is set on a first recording surface of a recording medium, and the second recording area is set on a second recording surface. 3. The recording medium according to claim 2, wherein a plurality of the recording media are provided, and a predetermined recording surface of the plurality of recording media is a first recording surface and a remaining recording surface is a second recording surface. The described navigation device. 4. The navigation device according to claim 1, wherein a priority is set for the read / write data, and areas in which the data is recorded are made different based on the priority. 5. The navigation device according to claim 4, wherein the priority is the importance of data. 6. The navigation device according to claim 4, wherein the priority is a writing frequency during traveling. 7. A read medium for setting a first recording area and a second recording area, which are separated from each other, on the recording medium, and carrying out predetermined navigation processing in the first recording area, in the second recording area. A data recording method for recording read / write data for performing the navigation process. 8. A reading medium recorded in a first recording area and a second recording area recorded on a recording medium in which a computer is separated from each other and a first recording area and a second recording area are set. Read processing means for reading the read / write data, navigation processing means for performing a predetermined navigation processing based on the read read data and read / write data, and read to the second recording area. / A program for a read / write method characterized by causing it to function as a write processing means for writing write data. 9. A first recording area and a second recording area are set separately from each other, read data for performing a predetermined navigation process is recorded in the first recording area, and the navigation is recorded in the second recording area. A recording medium on which read / write data for processing is recorded.