JP2008243344A - Disk device, information processing device, or the like - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a disk device, an information processing device, or the like which can be used normally under a non-guaranteed range while utilizing sufficiently margin of a flying height of a head in the non-guaranteed range of the disk device, and to provide an information processing device, or the like. <P>SOLUTION: In the disk device provided with a disk 41 having a ring-shaped information recording region, a head 42 moved on the disk 41 in a non-contact manner and writing or reading information for the disk 41, the information recording region 411 has a first information recording region 411c of an inner peripheral side of the disk 41 and second information recording regions 411a and 411b being an outer peripheral side of the first information recording region, second information to be used by the prescribed information processing device under highland or low pressure environment is recorded in the second information recording regions 411a and 411b, the first information other than the second information is recorded in the first information recording region 411c. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present application relates to a technical field of a disk device or the like that includes a disk having a ring-shaped information recording area and a head that moves in a non-contact manner on the disk and writes or reads information on the disk.

  A hard disk drive (hereinafter referred to as “HDD (Hard Disk Drive)”) is known as this type of disk device.The HDD head (magnetic head) is on an air film generated by the dynamic pressure of air due to the rotation of the disk. The HDD is set so that data can be read and written in a state where it does not come into direct contact with the disk (for example, the head and the disk maintain a gap of 0.1 μm or less). Since the external air pressure and the internal air pressure are configured to be more equal, the dynamic pressure generated varies depending on the atmospheric pressure (altitude) used, and in some cases, the situation where the head contacts the disk may occur. For this reason, in a normal HDD, the maximum altitude is assured to guarantee reliability without the head directly contacting the disk over the entire disk. Shock during operation defines pressure to withstand the dynamic pressure can be generated in the vibration, the range, for example, (corresponding to 0.7 atm) 3,000 m) following.

As a technology relating to protection of recording data and heads in such an HDD, Patent Document 1 describes that when a violation of environmental specifications occurs in a disk device, it conforms to the type of violation of the environmental specifications and the intention of the host device or user. A system capable of taking measures according to the above is disclosed.
JP 2003-109293 A

  By the way, because of the structure of the HDD, the disk is driven at a constant rotational speed. Therefore, there is a difference in the relative speed of the head between the inner circumference side and the outer circumference side of the disk. As shown in FIG. 1, the head flying height from the disk is smaller on the inner circumferential side than on the outer circumferential side, as shown in FIG. For this reason, the guaranteed range in a normal HDD is set with reference to the inner circumference side of the disk. Therefore, there is a margin in the flying height of the head on the outer peripheral side of the disk (hatched portion in FIG. 1), and there is actually a range in which sufficient dynamic pressure can be secured even if the guaranteed range is exceeded.

  In the technique of Patent Document 1 described above, even if the atmospheric pressure is outside the guaranteed range (see FIG. 3 of Patent Document 1) (design margin range), the HDD may be used normally by executing countermeasures. No measures are taken in consideration of the difference in head flying height between the peripheral side and the outer peripheral side. Therefore, it is difficult to fully utilize the head flying height margin on the outer peripheral side of the disk.

  Therefore, the present application considers solving such a problem as one of the issues, and making full use of the head flying height outside the guaranteed range of the disk device and using it normally in an environment outside the guaranteed range. An object of the present invention is to provide a disc device, an information processing device, and the like that are made possible.

  In order to solve the above-mentioned problem, the invention described in claim 1 includes a disk having a ring-shaped information recording area, and a head that moves in a non-contact manner on the disk and writes or reads information on the disk. The information recording area includes a first information recording area on the inner circumference side of the disc and a second information recording area on the outer circumference side of the first information recording area. And the second information recording area records second information to be used by a predetermined information processing apparatus in a high altitude or low-pressure environment, and the first information recording area includes information other than the second information. The first information is recorded.

  According to a fourth aspect of the present invention, there is provided an information processing apparatus provided on a moving body and comprising the disk device according to any one of the first to third aspects, wherein the position information acquisition acquires position information of a current position. And map display processing means for reading out map data corresponding to the acquired position information from the information recording area in the disc and performing map display processing using the map data.

  The invention according to claim 6 is an information processing method in an information processing apparatus provided on a moving body and including the disk device according to any one of claims 1 to 3, wherein the altitude of the current position is detected. And a step of reading map data corresponding to the detected altitude from the information recording area in the disc and performing map display processing using the map data.

  An information processing program according to a seventh aspect of the present invention is an altitude detection means for detecting the altitude of the current position of a computer provided in a moving body and comprising the disk device according to any one of claims 1 to 3. And map data corresponding to the detected altitude is read from the information recording area of the disc and functioned as map display processing means for performing map display processing using the map data.

  Hereinafter, the best embodiment of the present application will be described with reference to the accompanying drawings. In addition, embodiment described below is embodiment when this application is applied with respect to the navigation apparatus mounted in the vehicle as an example of a mobile body. Further, the information processing apparatus of the present application constitutes a part of the navigation apparatus.

  FIG. 2 is a diagram illustrating a schematic configuration example of the navigation device according to the present embodiment. FIG. 3 is a diagram illustrating a schematic configuration example of the HDD.

  As shown in FIG. 2, the navigation device S includes a GPS (Global Positioning System) receiving unit 1, a sensor unit 2, a communication unit 3, an HDD 4, a display unit 5, an audio output unit 6, an operation unit 7, and a system control unit 8. Etc. are provided.

  The GPS receiving unit 1 receives a navigation radio wave output from a GPS satellite arranged in the satellite orbit and orbiting the earth via a GPS antenna, performs positioning based on the received signal, and positioning data (longitude, latitude, and Altitude information) is output to the system control unit 8.

  The sensor unit 2 includes, for example, a speed sensor that detects the speed of the vehicle based on a vehicle speed pulse, a direction sensor (gyro sensor) that detects the traveling direction of the vehicle using geomagnetism, an acceleration sensor that detects the acceleration of the vehicle, A distance sensor for detecting the travel distance is provided, and each data (speed data, azimuth data, acceleration data, travel distance data, etc.) detected by these sensors is output to the system control unit 8. Yes.

  The communication unit 3 can communicate with a predetermined server connected to a mobile communication network (including a base station) via an antenna under the control of the system control unit 8.

  As shown in FIG. 3, the HDD 4 as an example of a disk device includes a disk (hard disk) 41, a head (magnetic head) 42, an actuator 43, a spindle motor 44, a servo control unit 45, a data processing unit 46, and the like. It is configured.

  The disk 41 has a ring-shaped information recording area (recording surface) 411 in which a large number of concentric data tracks are arranged. In the example of FIG. 3, the information recording area 411 includes an information recording area 411c (an example of a first information recording area) on the inner circumference side of the disc 41, an information recording area 411a located on the outer circumference side of the information recording area 411c, and 411b (an example of the second information recording area). That is, the information recording area 411 is divided into three stages of information recording areas 411 a to 411 c from the outer peripheral side to the inner peripheral side of the disc 41. In the example of FIG. 3, an example in which the level is divided into three levels is shown, but the present invention is not limited to this, and may be divided into two levels or four or more levels.

  In the information recording area 411a, a program that is read and used by the system control unit 8 when the navigation device S is activated (for example, a program for executing map display processing, route search processing, and route guidance processing in the navigation device S). And user data unique to each user (for example, the ID of the user, setting information set by the user, travel history information, etc.) (second to be used by the navigation device S in a high altitude or low pressure environment) An example of information) is recorded.

  Further, in the information recording area 411b located between the information recording area 411a and the information recording area 411c, high altitude map data (high altitude or low pressure) at a predetermined altitude (for example, 3,000 m, which is the boundary of the guarantee range) or higher. An example of second information to be used by the navigation device S under the environment is recorded. Note that the high altitude map data at a predetermined altitude or higher may be recorded in the information recording area 411a.

  In the information recording area 411c, for example, map data of lowland below the predetermined altitude other than the programs and data recorded in the information recording area 411a and the information recording area 411b (first information other than the second information) Example) is recorded. In the information recording area 411c, programs and data used only in the lowland may be recorded in addition to the lowland map data.

  Here, the map data of the highland and the map data of the lowland are both map image data for displaying a map on the screen in the display unit 5 and coordinates of each point (coordinates on the map corresponding to latitude and longitude (X , Y)), etc., for example, a plurality of administrative boundary data (including addresses corresponding to each administrative division) indicating the boundaries of a plurality of administrative divisions on the map, a road indicating a road on the map Multiple facility data (each facility name, facility address, etc.) indicating data (including information on each road name, road width, etc.), multiple facilities on the map (eg, gas stations, stores, parking lots, etc.) ), And shape data (including names of rivers and mountains) indicating the shape of a plan view of a river or a mountain.

  Such map data is read from the disk 41 and output to the system control unit 8 in accordance with instructions from the system control unit 8 as appropriate in map display processing, route search processing, or route guidance processing.

  Further, the disk 41 is driven to rotate by a spindle motor 44. The actuator 43 has a voice coil motor (not shown) as a drive source of the actuator 43, and is rotated by the voice coil motor. The servo control unit 45 controls the drive of the spindle motor 44 and the voice coil motor under the control of the system control unit 8 (note that the tracking servo is applied based on a signal from the head 42). .

  The head 42 is used for writing information (data or program) to the disk 41 or reading information from the disk 41. The head 42 is attached to the tip of the actuator 43, and moves in a radial direction on the disk 41 in a non-contact manner according to the rotation (angular rotation) of the actuator 43.

  The head 42 is connected to the data processing unit 46. A signal related to the information read by the head 42 is amplified by the data processing unit 46 and subjected to a predetermined decoding process or the like, and then output to, for example, the system control unit 8. On the other hand, a signal related to information to be written on the disk 41 is input from the system control unit 8 to the data processing unit 46, for example, and after a predetermined encoding process is performed, a predetermined information recording area on the disk 41 is recorded by the head 42. It is written at (a target track position designated by the system control unit 8).

  In the example of FIG. 3, the HDD 4 having a single disk 41 is shown, but the HDD 4 in which a plurality of disks 41 are stacked may be used.

  The display unit 5 includes, for example, a drawing processing unit, a buffer memory, and a display (for example, a liquid crystal display or an organic EL display). The drawing processing unit controls the map data under the control of the system control unit 8. Are expanded and drawn in the buffer memory, and then displayed on the screen of the display. In addition, for example, instruction buttons for prompting various instructions to the user under the control of the system control unit 8 are also displayed on the screen.

  The audio output unit 6 includes, for example, a DAC (digital / analog signal converter), an amplifier, a speaker, and the like. After A conversion, it is amplified by an amplifier and output as sound waves from a speaker.

  The operation unit 7 has a plurality of instruction buttons (operation buttons) for receiving various instructions from the user, and outputs an instruction signal corresponding to the instruction button pressed by the user to the system control unit 8. The operation unit 7 performs infrared communication with a remote control (not shown) provided with various operation buttons, receives an instruction signal from the remote control, and outputs it to the system control unit 8. Also good.

  The system control unit 8 includes a CPU having an arithmetic function, a working RAM, a ROM that stores various data and programs, and the like, and performs overall control of all the components in the navigation device S. Then, the system control unit 8 reads and executes a program (including the information processing program of the present application) recorded on the disk 41 in the HDD 4, for example, so that the position information acquisition unit, the map display processing unit, the map data of the present application is executed. It functions as an acquisition unit, a recording control unit, and the like, and performs predetermined processing (for example, map display processing, route search processing, route guidance processing, and the like).

  Processing in the system control unit 8 will be described with reference to FIG.

  FIG. 4 is a flowchart illustrating an example of processing in the system control unit 8.

  First, for example, when the navigation device S is activated (for example, when the power is turned on), the system control unit 8 gives a command to the HDD 4 to execute a map display process or the like from the information recording area 411a in the disk 41. And initial setting is performed (step S1).

  Here, for example, when the navigation device S is activated when the vehicle equipped with the navigation device S is at a high altitude outside the guaranteed range of the HDD 4, the program for executing the map display processing or the like is Since the information is read from the information recording area 411a located on the outer peripheral side of the information recording area 411c on the side, the head 42 is placed in the information recording area 411c on the inner peripheral side of the disk 41 in a low-pressure environment outside the guaranteed range. Access can be restricted, and accidental contact between the head 42 and the disk 41 can be prevented.

  Next, the system control unit 8 acquires positioning data from the GPS receiving unit 1 as position information of the current position (step S2). Note that the acquired position information of the current position is appropriately corrected using data from the sensor unit 2.

  Next, the system control unit 8 reads out map data (for example, around the current position (for example, within a radius of 1 km)) from the information recording area 411b or 411c and performs map display processing using the map data. Is performed (step S3). In the map display process, the read map data and mark data indicating the host vehicle are sent to the display unit 5 and the map is displayed on the screen, and at the location corresponding to the current position on the map. A mark indicating the host vehicle is displayed.

  At this time, for example, if the vehicle is traveling on a highland outside the guaranteed range of the HDD 4, the surrounding map is referred to as highland map data, and the map data is on the outer periphery of the information recording area 411c on the inner periphery side. Therefore, the head 42 can be restricted from accessing the information recording area 411c on the inner peripheral side of the disk 41 in a low-pressure environment outside the guaranteed range. Inadvertent contact between the disk 42 and the disk 41 can be prevented.

  In other processes in step S4, a route search process is performed based on an instruction from the user via the operation unit 7, for example. When the route search process is performed, the route guidance process to the searched destination is performed together with the processes of steps S2 to S3.

  Note that the processing shown in FIG. 4 is terminated when, for example, a termination instruction or a power-off instruction is received from the user.

  As described above, according to the above embodiment, the information recording area 411a or 411b on the outer peripheral side of the information recording area 411c on the inner peripheral side of the disk 41 in the HDD 4 is moved to the information recording area 411a or 411b by the navigation device S in a high altitude or low pressure environment. Information to be used (for example, a program used by the system control unit 8 when the navigation device S is started up and high altitude map data at a predetermined altitude or higher) is recorded, and the information recording area 411c stores the information recording area. Since information other than the program and data recorded in the information recording area 411a and the data recording area 411b is recorded, even if the HDD 4 is used in a low pressure (high altitude) environment outside the guaranteed range, 42 is restricted from accessing the information recording area 411c on the inner circumference side of the disc 41 Can, as much as possible to prevent the head 42 and the disk 41 comes into contact with the accidental (e.g., as much as possible to prevent data loss) can be. Moreover, the malfunction that the navigation apparatus S cannot be started in a low atmospheric pressure (high altitude) environment can be avoided as much as possible. Therefore, it is possible to use the HDD 4 normally while ensuring reliability in an environment outside the guaranteed range while fully utilizing the head flying height margin (particularly on the outer circumference side) outside the guaranteed range of the HDD 4.

  Further, the physical position of the map data accessed on the disk 41 can be made dependent on the current position of the navigation device S.

  In the above-described embodiment, the GPS receiver 1 provided in the general navigation device S does not determine whether the atmospheric pressure is within the guaranteed range of the HDD 4 using a barometer, a pressure sensor, or the like. Since it is sufficient to acquire the current position, the cost can be reduced.

  In the above embodiment, the information recording area 411 is divided into three or more stages from the outer peripheral side to the inner peripheral side of the disc 41, and map data divided in stages according to the altitude is divided into each information recording area. You may comprise so that the map data in a higher altitude may be recorded in the information recording area on the outer peripheral side. According to this configuration, the head flying height margin outside the guaranteed range of the HDD 4 can be further utilized.

  In the above embodiment, the upgraded map data or new map data is stored in an external device (for example, a predetermined server connected to a mobile communication network or the like) or a recording medium (for example, a CD-ROM or a card-type nonvolatile memory). It is also conceivable that the data is supplied to the navigation device S by the memory). In this case, information indicating the altitude type (for example, highland or lowland) is added to the map data. Then, the system control unit 8 sends map data (for example, a predetermined server connected to a mobile communication network or the like) or a recording medium (for example, a CD-ROM or a card-type nonvolatile memory) or the like. Information indicating the altitude type added to the acquired map data when the map data (upgraded map data or new map data) is acquired (for example, acquired through the communication unit 3 or acquired through a CD-ROM drive not shown). The map data may be controlled to be recorded in the information recording area based on the above. For example, it is determined whether the altitude type is highland or lowland. If the altitude type is highland, the map data is recorded in the information recording area 411a or 411b. Data is recorded in the information recording area 411c. According to this configuration, even if map data is supplied later, the same effect as that of the above-described embodiment can be obtained.

  Further, as a function supplementing the above-described embodiment, the system control unit 8 is based on the altitude information acquired from the GPS receiving unit 1 and has a preset altitude (for example, the head flying height also on the outer periphery side of the disk 41). It is determined whether or not the altitude is higher, and if the altitude is higher than the altitude, it is possible to prohibit (lock) reading / writing of data to / from the HDD 4 so that the head floats outside the guaranteed range of the HDD 4. It is possible to reliably prevent the head 42 and the disk 41 from inadvertently contacting each other while fully utilizing the margin of the amount.

  In the above embodiment, an example in which the present application is applied to a navigation device mounted on a vehicle has been described. However, the present invention is not limited to this. For example, a communication navigation terminal and the communication navigation The present invention can be applied to a communication navigation system including a terminal including a communication center device to which a terminal is connected via an antenna and a mobile communication network (including a wireless base station). The present application is also applicable to other electronic devices mounted on a vehicle and provided with an HDD and a GPS receiver.

  In the above embodiment, the case of a vehicle as an example of a moving body has been described. However, the present invention is not limited to this. For example, for mobile phones equipped with HDDs and GPS receivers, PHS, PDAs, etc. It is also possible to apply the present application. In addition, in the mobile phone and the PHS, the altitude information of the own device can be obtained by obtaining the nearest base station information in addition to the GPS, for example.

  In the above-described embodiment, the case where the HDD is applied as an example of the disk device has been described. However, a disk having a ring-shaped information recording area and a disk that moves on the disk in a non-contact manner and stores information on the disk. The present invention can be applied to devices other than the HDD as long as the device includes a head for writing or reading.

It is a figure which shows the relationship between the flying height of a head, the recording position (inner periphery to outer periphery) of a disk, and altitude (atmospheric pressure). It is a figure showing an example of outline composition of a navigation device concerning this embodiment. It is a figure which shows the example of schematic structure of HDD. 5 is a flowchart illustrating an example of processing in a system control unit 8.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 GPS receiving part 2 Sensor part 3 Communication part 4 HDD
DESCRIPTION OF SYMBOLS 5 Display part 6 Audio | voice output part 7 Operation part 8 System control part 41 Disk 42 Head 43 Actuator 44 Spindle motor 45 Servo control part 46 Data processing part 411 Information recording area S Navigation apparatus

Claims (8)

A disk device comprising: a disk having a ring-shaped information recording area; and a head that moves in a non-contact manner on the disk and writes or reads information on the disk;
The information recording area has a first information recording area on the inner circumference side of the disc, and a second information recording area on the outer circumference side than the first information recording area,
In the second information recording area, second information to be used by a predetermined information processing device in a high altitude or low pressure environment is recorded, and in the first information recording area, first information other than the second information is recorded. Is recorded on the disk device. The disk device according to claim 1,
The second information includes at least any one of high altitude map data at a predetermined altitude or higher, a program or data used when starting the information processing apparatus, and user data unique to each user. A disk device characterized by that. The disk device according to claim 1,
The information recording area is divided into three or more stages from the outer peripheral side to the inner peripheral side of the disc, and map data divided in stages according to altitude is recorded in each information recording area, and The disk device is characterized in that map data at a higher altitude is recorded in the information recording area on the outer peripheral side. An information processing apparatus provided on a moving body, comprising the disk device according to any one of claims 1 to 3,
Position information acquisition means for acquiring position information of the current position;
Map display processing means for reading out map data corresponding to the acquired position information from the information recording area in the disc and performing map display processing using the map data;
An information processing apparatus comprising: The information processing apparatus according to claim 4,
Map data acquisition means for acquiring map data from an external device or a recording medium;
Recording control means for controlling to record the map data in the information recording area based on information indicating the altitude type added to the acquired map data;
An information processing apparatus further comprising: An information processing method in an information processing apparatus provided on a moving body and comprising the disk device according to any one of claims 1 to 3,
Detecting the altitude of the current position;
Reading map data corresponding to the detected altitude from the information recording area in the disc, and performing map display processing using the map data;
An information processing method comprising: A computer provided with a disk device according to any one of claims 1 to 3, provided on a moving body,
Function as altitude detection means for detecting the altitude of the current position, and map display processing means for reading map data corresponding to the detected altitude from the information recording area in the disc and performing map display processing using the map data An information processing program characterized by causing   8. A recording medium on which the information processing program according to claim 7 is recorded so as to be readable by a computer.

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