JP2013140483A - Data recording device and recording medium life monitoring system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a data recording device that allows a management device to easily manage replacement time of a plurality of recording media.SOLUTION: A method of operational procedures of an on-vehicle device 10 comprises the steps of: reading-out a number of times of writing recorded on a memory card 25 when one hour has elapsed, (S2); calculating a remaining number of times of writing and a number of times of writing per one hour from the number of times of wiring and a previous number of times of writing stored in an SDRAM 13, (S3); and transmitting data to a vehicle management device 30 installed at an office 70 when the remaining number of times of writing is 100 times or less, (S5). A method of operational procedures of the vehicle management device 30 comprises the steps of: calculating scheduled reaching time required to reach a limited number of times of writing from the remaining number of times of writing and the number of times of writing per one hour, (S32); and updating a recording medium life monitoring table 55 and performing warning when the scheduled reaching time is set time or less, (S34).

Description

  The present invention relates to a data recording apparatus for writing data on a recording medium and a recording medium lifetime monitoring system.

  Conventionally, as a data recording device, an in-vehicle device such as a drive recorder records large capacity data such as an image taken by a camera on a recording medium. Usually, the recording limit number is set on the recording medium so as to ensure reliable writing.

  When using the recording medium, it is necessary to replace the recording medium before the write limit is reached and the data is destroyed. On the other hand, it is also required to use up to the write limit number without waste.

  2. Description of the Related Art Conventionally, there has been known an apparatus for notifying that a recording medium has a writing life when a recording medium reaches the write limit number. FIG. 8 is a flowchart showing the operation procedure of the conventional apparatus. This apparatus determines whether or not the recording medium has a writing life (step S101). If the writing life is not reached, the apparatus ends the operation as it is. On the other hand, if it is the writing life, this apparatus issues a warning or display by voice (step S102) and ends this operation.

  There is also known an apparatus that displays a message that prompts the user to replace the hard disk when it is detected that the cumulative number of uses of the recording medium has exceeded the allowable number of uses, or when the cumulative use period has exceeded the allowable use time. (See Patent Document 1).

JP 2003-085960 A

  However, the conventional data recording apparatus has the following problems. That is, the conventional data recording apparatus merely gives a warning by display or sound when the writing life is reached. For this reason, it is difficult to know how much time is left until the writing life is reached, and it is difficult to use the recording medium without waste.

  In addition, in a company or the like that has a plurality of vehicles, it is difficult to manage because it is not known which vehicle has a recording life reached. Also, in the case of a vehicle carrying a customer, it was difficult to give a warning or display by voice during business.

  The present invention has been made in view of the above-described circumstances, and an object of the present invention is to provide a data recording apparatus and a recording medium lifetime monitoring system that can use the recording medium without waste until the replacement time. .

  Another object of the present invention is to provide a data recording apparatus and a recording medium lifetime monitoring system that allow the management apparatus to easily manage the replacement timing of a plurality of recording media.

In order to achieve the object described above, a data recording apparatus according to the present invention is characterized by the following (1) to (7).
(1) A data recording device for writing data to a recording medium,
A counting unit for counting the number of times of writing to the recording medium;
A calculation unit for calculating a temporal change in the number of writes counted by the counting unit;
Based on the time change calculated by the calculation unit, a prediction unit that calculates a scheduled arrival time until the write number reaches a write limit number that limits writing to the recording medium;
Be provided.
(2) A data recording apparatus having the configuration of (1) above,
A transmission unit that transmits the estimated arrival time calculated by the prediction unit to the management apparatus;
(3) A data recording apparatus having the configuration of (2) above,
When the estimated arrival time calculated by the prediction unit is less than or equal to a set time, the transmission unit transmits the estimated arrival time to the management device.
(4) A data recording device having the above configuration (1) or (2),
A notification unit that issues a warning prompting replacement of the recording medium when the estimated arrival time calculated by the prediction unit is less than or equal to a set time;
(5) A data recording device having any one of the constitutions (1) to (4),
A vehicle-mounted device mounted on a vehicle, wherein the operation data of the vehicle is recorded on the recording medium.
(6) A data recording device for writing data to a recording medium,
A counting unit for counting the number of times of writing to the recording medium;
A calculation unit for calculating a temporal change in the number of writes counted by the counting unit;
A transmission unit that transmits to the management device the remaining number of writes until the time change calculated by the calculation unit and the number of writes reaches a write limit number that limits writing to the recording medium;
A data recording apparatus comprising:
(7) A data recording device configured as described in (6) above,
When the remaining number of times of writing is less than or equal to the set number of times, the transmission unit transmits the time change and the number of remaining times of writing to the management device.

In order to achieve the above-described object, the recording medium life monitoring system according to the present invention is characterized by the following (8) or (9).
(8) A recording medium lifetime monitoring system comprising at least one data recording device that writes data to a recording medium, and a management device that manages the recording medium,
The data recording device comprises:
A counting unit for counting the number of times of writing to the recording medium;
A calculation unit for calculating a temporal change in the number of writes counted by the counting unit;
Based on the time change calculated by the calculation unit, a prediction unit that calculates a scheduled arrival time until the write number reaches a write limit number that limits writing to the recording medium;
A transmission unit for transmitting the estimated arrival time calculated by the prediction unit to the management device;
With
The management device
A receiver for receiving the estimated arrival time;
A registration unit for registering the estimated arrival time received by the reception unit;
If the estimated arrival time is less than or equal to a set time, a notification unit that issues a warning prompting replacement of the recording medium;
Be provided.
(9) A recording medium lifetime monitoring system comprising at least one data recording device that writes data to a recording medium, and a management device that manages the recording medium,
The data recording device comprises:
A counting unit for counting the number of times of writing to the recording medium;
A calculation unit for calculating a temporal change in the number of writes counted by the counting unit;
A transmission unit that transmits to the management device the time change calculated by the calculation unit, and the remaining number of times of writing until the number of times of writing reaches the number of times of writing that restricts writing to the recording medium;
With
The management device
A receiving unit that receives the time change calculated by the calculating unit and the remaining number of writes;
Based on the time change and the remaining number of times of writing, a predicting unit that calculates an expected arrival time until the number of times of writing reaches the number of times of writing limit,
A registration unit for registering the estimated arrival time calculated by the prediction unit;
If the estimated arrival time is less than or equal to a set time, a notification unit that issues a warning prompting replacement of the recording medium;
Be provided.

  According to the data recording device having the configuration of (1) to (7) and the recording medium life monitoring system having the configuration of (8) or (9), the number of writes is written based on the change in the number of times of writing. Since the estimated arrival time until the limit number is reached is calculated, the recording medium can be used without waste until the replacement time. In addition, the management device can easily manage the replacement time of a plurality of recording media.

According to the present invention, the estimated arrival time until the write count reaches the write limit count is calculated based on the time change of the write count, so that the recording medium can be used without waste until the replacement time. .
In addition, the management device can easily manage the replacement time of a plurality of recording media.

FIG. 1 is a diagram showing a configuration of a recording medium life monitoring system 1 including an in-vehicle device 10 according to the first embodiment. FIG. 2 is a diagram showing an outline of the recording medium life monitoring system 1. FIG. 3 is a flowchart showing an operation procedure of the in-vehicle device 10. FIG. 4 is a flowchart showing an operation procedure of the vehicle management device 30. FIG. 5 is a diagram showing a recording medium life monitoring table 55 in which recording medium life monitoring results for each vehicle are registered. FIG. 6 is a flowchart illustrating an operation procedure of the in-vehicle device 10 according to the second embodiment. FIG. 7 is a flowchart showing an operation procedure of the in-vehicle device 10 in the third embodiment. FIG. 8 is a flowchart showing the operation procedure of the conventional apparatus.

  A data recording apparatus and a recording medium life monitoring system according to an embodiment of the present invention will be described with reference to the drawings. The data recording device of the present embodiment is applied to an in-vehicle device such as a drive recorder mounted on a vehicle such as a bus or taxi. The recording medium life monitoring system according to the present embodiment includes a data recording device and a vehicle management device installed in an office.

(First embodiment)
FIG. 1 is a diagram showing a configuration of a recording medium life monitoring system 1 including an in-vehicle device 10 according to the first embodiment. FIG. 2 is a diagram showing an outline of the recording medium life monitoring system 1.

  The recording medium life monitoring system 1 includes a plurality of in-vehicle devices 10 respectively mounted on a plurality of vehicles 40 and a vehicle management device 30 installed in an office 70. Here, as a plurality of vehicles 40, four vehicles A, B, C, and D are wirelessly connected to the vehicle management apparatus 30 by a wireless LAN 60 or the like.

  The in-vehicle device 10 includes a CPU 11, a reader / writer 12, an SDRAM 13, a wireless module 14, a timer 24, and various interfaces (I / F) 15, 16, 17, and 18. The CPU 11 executes a control program stored in a built-in ROM (not shown) and controls the in-vehicle device 10 as a whole.

  The reader / writer 12 reads / writes data such as operation data from / to the memory card 25 that is detachably mounted. As the memory card 25, a CF card or an SD card (registered trademark) is used. When data is written to the memory card 25, the reader / writer 12 (counting unit) increases the number of times of writing assigned to a predetermined area of the memory card 25 by one. Instead of the reader / writer 12 storing the number of times of writing, the CPU 11 may increase the number of times of writing assigned to a predetermined area of the SDRAM 13 when the memory card 25 is written.

  The SDRAM 13 stores the number of times of writing to the memory card 25 confirmed every hour in time series and is used as a work memory for the CPU 11. The wireless module 14 is connected to the vehicle management apparatus 30 via a wireless LAN 60 or the like, and transmits and receives data. The timer 24 measures time.

  The camera I / F 15 is connected to a camera 19 that is installed in the vehicle 40 and photographs the front of the vehicle. A G sensor 20 that detects the acceleration of the vehicle is connected to the sensor I / F 16. A speed sensor 21 that detects the vehicle speed is connected to the speed I / F 17. Connected to the I / O interface 18 are a speaker 22 that issues a warning and a display lamp 23 that is lit.

  On the other hand, the vehicle management apparatus 30 includes a CPU 31, a display 32, a database (DB) 33, a wireless module 34, an operation unit 35, and a speaker 36. The CPU 31 controls the entire vehicle management device 30 according to a control program stored in a built-in ROM and executes an operation program described later.

  The display 32 displays various information. In the database 33, a recording medium life monitoring table 55 described later is registered. The wireless module 34 is connected to the in-vehicle device 10 via a wireless LAN 60 or the like, and transmits and receives data. The operation unit 35 has a pointing device such as a keyboard and a mouse, and receives an instruction operated by an administrator. The speaker 36 emits a sound such as a warning.

  The operation of the recording medium lifetime monitoring system 1 having the above configuration will be described. FIG. 3 is a flowchart showing an operation procedure of the in-vehicle device 10. As described above, this operation program is stored in the ROM in the CPU 11 and is executed by the CPU 11. The in-vehicle device 10 first waits until a predetermined time (1 hour in the present embodiment) elapses (step S1). When 1 hour has elapsed, the in-vehicle device 10 reads the number of times of writing recorded in the memory card 25 (recording medium) (step S2).

  The in-vehicle device 10 calculates the remaining number of times of writing and the number of times of writing per unit time (here, one hour) from the number of times of writing that has been read and the number of times of previous writing (one hour ago) stored in the SDRAM 13 (step S3). . Here, the number of times of writing per hour is calculated as an average value of the number of times of writing stored in the SDRAM 13 in time series. The change in the number of times of writing is not limited to the average value, and may be a representative value of the number of times of writing per a predetermined time in the past or a value to which various weights are applied. The process in step S3 corresponds to a calculation unit.

  The in-vehicle device 10 determines whether or not the remaining number of writes to the memory card 25 is equal to or less than the set number (100 in the present embodiment) (step S4). If it is not less than the set number of times, the in-vehicle device 10 ends this operation. Here, the set number is set to an arbitrary value that does not reach the write limit number before the next predetermined time in step S1 elapses. Further, the predetermined time in step S1 can be set to an arbitrary value such as 5 hours or 24 hours.

  On the other hand, when the number is less than or equal to the set number in step S4, the in-vehicle device 10 transmits the remaining number of writes and the number of writes per hour to the vehicle management device 30 installed in the office 70 (step S5). As described above, transmission is performed only when the number of times is equal to or less than the set number of times, so that communication and processing loads can be reduced. Thereafter, the in-vehicle device 10 ends this operation.

  FIG. 4 is a flowchart showing an operation procedure of the vehicle management device 30. This operation program is stored in the ROM in the CPU 31 and is periodically executed by the CPU 31. The vehicle management device 30 determines whether or not the data including the remaining number of times of writing and the number of times of writing per hour has been received from the in-vehicle device 10 (step S31).

  When these data are not received, the vehicle management apparatus 30 complete | finishes this operation | movement. On the other hand, when these data are received, the vehicle management apparatus 30 calculates the estimated arrival time until the write limit number is reached from the remaining number of times of writing and the number of times of writing per hour (step S32). Note that the process of receiving data in step S31 corresponds to a receiving unit.

  The vehicle management device 30 determines whether or not the estimated arrival time is less than or equal to a preset set time (step S33). The set time may be the same value as the predetermined time in step S1 described above, or may be a different value. When the estimated arrival time exceeds the set time, the vehicle management device 30 ends this operation as it is.

  On the other hand, when the estimated arrival time is equal to or shorter than the set time in step S33, the vehicle management device 30 updates the recording medium life monitoring table 55 and issues a warning (step S34). As this warning, a warning may be issued from the speaker 36 or a warning screen may be displayed on the display 32. Further, the process of updating the recording medium life monitoring table 55 in step S34 corresponds to a registration unit. Thereafter, the vehicle management device 30 ends this operation.

  FIG. 5 is a diagram showing a recording medium life monitoring table 55 in which recording medium life monitoring results for each vehicle are registered. In this recording medium life monitoring table 55, the remaining number of times of writing and the estimated arrival time are shown for each vehicle. For example, in vehicle A, the remaining number of times of writing is 100, and the estimated arrival time is 50 hours later. In the figure, a blank “-” indicates that the data of the remaining number of times of writing and the estimated arrival time has not been received yet.

  Thus, according to the recording medium lifetime monitoring system 1 of the first embodiment, it becomes possible to use the memory card 25 mounted on the vehicle 40 without waste until the replacement time.

  In addition, since each in-vehicle device 10 transmits the remaining number of writes necessary for calculating the estimated arrival time and the number of writes per hour to the vehicle management device 30, the vehicle management device 30 determines when to replace the plurality of memory cards 25. It can be managed easily. That is, the replacement time of the memory card 25 mounted in each of the plurality of vehicles 40 (vehicles A, B, C, D) can be collectively managed by the office 70 (or center), and the memory for each vehicle 40 is stored. A guideline for replacing the card 25 (recording medium) is known.

  Therefore, even if the number of vehicles is large, it can be surely replaced before reaching the write limit number. Also, since the number of times of writing is usually different for each vehicle, the memory card can be exchanged at a timing suitable for each vehicle, and waste is reduced compared to the case where all are exchanged at once.

  Moreover, since a warning by display or sound is not notified, even a vehicle on which a customer is placed can be utilized. Furthermore, the driver does not have to worry about the replacement of the memory card.

(Second Embodiment)
In the first embodiment, the calculation of the estimated arrival time until reaching the write limit number is performed by the vehicle management device installed in the office. However, in the second embodiment, the in-vehicle device Shows a case where the estimated arrival time is calculated.

  Since the in-vehicle device and the vehicle management device of the second embodiment have the same configuration as the first embodiment, by using the same reference numerals for the same components as the first embodiment, Description is omitted.

  FIG. 6 is a flowchart showing an operation procedure of the in-vehicle device 10 in the second embodiment. This operation program is stored in the ROM in the CPU 11 and is executed by the CPU 11. About the same step process as the said 1st Embodiment, the description is abbreviate | omitted by attaching | subjecting the same step number.

  The in-vehicle device 10 reads the number of times of writing recorded in the memory card 25 (recording medium) in step S <b> 2, and then arrives at the scheduled time until reaching the number of times of writing from the remaining number of times of writing and the number of times of writing per hour. Is calculated (step S3A). The process of step S3A corresponds to a prediction unit.

  The in-vehicle device 10 determines whether or not the estimated arrival time is less than or equal to the set time (step S4A). If it is not less than the set time, the in-vehicle device 10 ends this operation.

  On the other hand, when the estimated arrival time is equal to or shorter than the set time in step S4A, the in-vehicle device 10 transmits data including the estimated arrival time and the remaining writing count to the vehicle management device 30 (step S5A). In this way, the transmission and processing load can be reduced by transmitting only when the scheduled arrival time is less than or equal to the preset time set to a value near the replacement time of the recording medium. The process of step S5A corresponds to a transmission unit. Thereafter, the in-vehicle device 10 ends this operation.

  On the other hand, when the vehicle management device 30 receives the data from the in-vehicle device 10, the vehicle management device 30 updates the recording medium life monitoring table 55 and issues a warning. As this warning, a warning may be issued from the speaker 36 or a warning screen may be displayed on the display 32.

  As described above, according to the recording medium life monitoring system 1 of the second embodiment, each in-vehicle device 10 transmits the estimated arrival time to the vehicle management device 30, so that the vehicle management device 30 includes a plurality of memory cards 25. The replacement time can be easily managed. Moreover, since each arrival time is transmitted from each in-vehicle device 10, it is possible to reduce the processing load on the vehicle management device side.

  Note that the vehicle management device 30 may perform the process of step S4A performed by the in-vehicle device 10. In this case, the estimated arrival time and the remaining number of writes calculated in step S3A are always transmitted to the vehicle management device 30. Thereby, the vehicle management apparatus 30 can manage firmly also about the memory card with which it is estimated that there is sufficient time to reach a lifetime.

(Third embodiment)
In the first and second embodiments, the case where the vehicle management device issues a warning is shown. However, in the third embodiment, the case where the in-vehicle device itself issues a warning is shown.

  Since the in-vehicle device of the third embodiment has the same configuration as that of the first embodiment, the same components as those of the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  FIG. 7 is a flowchart showing an operation procedure of the in-vehicle device 10 in the third embodiment. This operation program is stored in the ROM in the CPU 11 and is executed by the CPU 11. About the same step process as the said 1st, 2nd embodiment, the description is abbreviate | omitted by attaching | subjecting the same step number.

  When the scheduled arrival time is equal to or shorter than the set time in step S4A, the in-vehicle device 10 issues a warning and transmits the scheduled arrival time calculated in step S3A and the remaining number of writes to the vehicle management device 30 (step S5B). As this warning, a sound may be emitted from the speaker 22 or the display lamp 23 may be turned on.

  In the case of a vehicle on which a customer is placed, this warning may be given only at a specific time such as a break start time. Giving a warning in step S5B corresponds to the notification unit.

  On the other hand, when the vehicle management device 30 receives the data from the in-vehicle device 10, the vehicle management device 30 updates the recording medium life monitoring table 55.

  According to the in-vehicle device in the third embodiment, a warning can be given on the vehicle side, and the lifetimes of a plurality of memory cards can be managed on the office side. Thereby, even if the driver forgets to replace the memory card, the manager on the office side can give the driver an instruction for replacement.

  The present invention is not limited to the configuration of the above-described embodiment, and any configuration that can achieve the function of the configuration of the present embodiment is applicable.

  For example, in the above-described embodiment, the case where the vehicle-mounted device is applied to a drive recorder has been described, but the present invention may be applied to a digital tachograph, a taximeter, or the like.

  Further, the reader / writer capable of recording on the recording medium is not limited to the one built in the main body of the in-vehicle device, but may be one installed outside and connected to the main body by a cable or the like.

  The recording medium is not limited to a memory card using a semiconductor memory as a storage element, but may be a hard disk drive that records data on a magnetic recording medium.

  Moreover, although the case where it applied to the vehicle-mounted apparatus was shown as said data recording apparatus in the said embodiment, this invention is applicable not only to a vehicle-mounted apparatus but to various electronic devices.

  The present invention is useful because the management device can easily manage the replacement time of a plurality of recording media when the data recording device writes data to the recording media.

DESCRIPTION OF SYMBOLS 1 Recording medium lifetime monitoring system 10 In-vehicle apparatus 11 CPU
12 Reader / Writer 13 SDRAM
14 Wireless module 15, 16, 17, 18 Interface (I / F)
DESCRIPTION OF SYMBOLS 19 Camera 20 G sensor 21 Speed sensor 22, 36 Speaker 23 Display lamp 24 Timer 25 Memory card 30 Vehicle management apparatus 31 CPU
32 Display 33 Database (DB)
34 Wireless module 35 Operation unit 40 Vehicle 55 Recording medium life monitoring table 60 Wireless LAN
70 office

Claims (9)

A data recording device for writing data to a recording medium,
A counting unit for counting the number of times of writing to the recording medium;
A calculation unit for calculating a temporal change in the number of writes counted by the counting unit;
Based on the time change calculated by the calculation unit, a prediction unit that calculates a scheduled arrival time until the write number reaches a write limit number that limits writing to the recording medium;
A data recording apparatus comprising: The data recording device according to claim 1, further comprising: a transmission unit that transmits the estimated arrival time calculated by the prediction unit to a management device. The data recording apparatus according to claim 2, wherein when the estimated arrival time calculated by the prediction unit is equal to or shorter than a set time, the transmission unit transmits the estimated arrival time to the management device. 3. The data recording apparatus according to claim 1, further comprising a notifying unit that issues a warning prompting replacement of the recording medium when the estimated arrival time calculated by the prediction unit is equal to or shorter than a set time. The data recording device according to any one of claims 1 to 4, wherein the data recording device is an in-vehicle device mounted on a vehicle and records operation data of the vehicle on the recording medium. A data recording device for writing data to a recording medium,
A counting unit for counting the number of times of writing to the recording medium;
A calculation unit for calculating a temporal change in the number of writes counted by the counting unit;
A transmission unit that transmits to the management device the remaining number of writes until the time change calculated by the calculation unit and the number of writes reaches a write limit number that limits writing to the recording medium;
A data recording apparatus comprising: The data recording apparatus according to claim 6, wherein when the remaining number of writings is equal to or less than a set number, the transmitting unit transmits the time change and the remaining number of writings to the management apparatus. A recording medium life monitoring system comprising at least one data recording device for writing data to a recording medium and a management device for managing the recording medium,
The data recording device comprises:
A counting unit for counting the number of times of writing to the recording medium;
A calculation unit for calculating a temporal change in the number of writes counted by the counting unit;
Based on the time change calculated by the calculation unit, a prediction unit that calculates a scheduled arrival time until the write number reaches a write limit number that limits writing to the recording medium;
A transmission unit for transmitting the estimated arrival time calculated by the prediction unit to the management device;
With
The management device
A receiver for receiving the estimated arrival time;
A registration unit for registering the estimated arrival time received by the reception unit;
If the estimated arrival time is less than or equal to a set time, a notification unit that issues a warning prompting replacement of the recording medium;
A recording medium life monitoring system comprising: A recording medium life monitoring system comprising at least one data recording device for writing data to a recording medium and a management device for managing the recording medium,
The data recording device comprises:
A counting unit for counting the number of times of writing to the recording medium;
A calculation unit for calculating a temporal change in the number of writes counted by the counting unit;
A transmission unit that transmits to the management device the time change calculated by the calculation unit, and the remaining number of times of writing until the number of times of writing reaches the number of times of writing that limits writing to the recording medium;
With
The management device
A receiving unit that receives the time change calculated by the calculating unit and the remaining number of writes;
Based on the time change and the remaining number of times of writing, a predicting unit that calculates an expected arrival time until the number of times of writing reaches the number of times of writing limit,
A registration unit for registering the estimated arrival time calculated by the prediction unit;
If the estimated arrival time is less than or equal to a set time, a notification unit that issues a warning prompting replacement of the recording medium;
A recording medium life monitoring system comprising:

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