JP5036781B2 - Data processing apparatus, data processing method, and program - Google Patents

Description

  The present invention relates to a data processing apparatus, a data processing method, and a program for performing overwriting processing of recorded data, and is particularly suitable for application to a drive recorder apparatus.

  A drive recorder device (hereinafter also referred to as a drive recorder) is installed in a vehicle such as an automobile. When an accident occurs, an accident occurs by recording data such as images, sound, time, and acceleration during the operation. It is an apparatus for clarifying the cause, and in recent years, it has been widely used for general users (see, for example, Patent Document 1).

  The above-mentioned drive recorder includes a camera for recording video (CCD: Charge Coupled Device camera, etc.), a microphone for acquiring sound, an acceleration sensor for detecting shocks such as accidents, sudden brakes and sudden handles, and a real-time clock for updating time ( Hereinafter, it is referred to as RTC (RTC: Real Time Clock), a non-volatile memory (such as an SD card) for storing acquired data, and the like.

  When the drive recorder detects an accident or an impact such as a sudden brake or a sudden handle, data for a predetermined time before and after the impact is stored in a nonvolatile memory (event recording). However, since the capacity of the nonvolatile memory is limited, when a predetermined number of pieces of data are stored in the nonvolatile memory, the oldest data is overwritten and the latest data is stored thereafter (see, for example, Patent Document 2). .

  In addition, the drive recorder is provided with a clock (RTC or the like) so that the generation time of data can be known. When the power is turned off, a secondary power source (lithium battery or the like) is driven to perform RTC processing (time update or the like) at all times (for example, see Reference 3).

JP 2005-165805 A Japanese Patent Laid-Open No. 06-237463 JP-A-11-125534

  However, if the RTC processing cannot be performed when the power is turned off, for example, due to a failure of the secondary power supply or battery exhaustion, the set time information is lost. In that case, for example, a time set as a default is set. However, since the default time is a time before the current time, the set time becomes incorrect. Furthermore, when an accident such as an accident, sudden braking, or sudden handle is detected in this state, and data for a predetermined time before and after the impact is overwritten and saved in the nonvolatile memory, the oldest data is determined as the oldest data. There is a problem of being overwritten. Furthermore, if data having an incorrect time is generated, there is a problem that when the user views the data, the user feels uncomfortable or uncomfortable.

  The present invention has been made to solve the above-described problem, and even when the time is not set correctly, a data processing apparatus and data processing capable of realizing processing for overwriting and storing the oldest data The main purpose is to obtain methods and programs.

The present invention, when the write request generation of the recording data, the computer records data including the time information to a data processing apparatus and method list recorded in the data storage unit a program for causing to function as each configuration of the next, time A time state holding unit (step or means) for holding a set state, a time state detecting unit (step or means) for detecting whether or not the time has been set in the time state holding unit (step or means), and the time A time setting unit (step or means) for setting time based on detection information of the state detection unit (step or means) and data stored in the data storage unit, and a time set by the time setting unit (step or means) A time updating unit (step or means) for updating the recording data and the time updating unit (step or means) when a recording data write request is generated. E Bei a data recording unit for recording the recording data including time information updated by means) in the data storage unit (step or means), the time setting unit, the time not set by the time state detector When it is detected, the time information stored in the data storage unit is read, and the time obtained by adding a predetermined time to the latest time among the read times is set as the set time .

  In addition, the data recording unit, when the time status detection unit detects that the time is not set when the recording data write request occurs, the time information included in the recording data recorded in the data storage unit is a provisional time. It is characterized by writing characters that can be found.

According to the present invention, even when the correct time cannot be set, for example, in a drive recorder that performs data processing, the time information of the data stored in the data storage unit is read, and a predetermined time is added to the latest time among the read times Since the time is set in the drive recorder, it is possible to prevent overwriting of the oldest data during overwriting.

  In addition, by writing a character indicating that the time information included in the recorded data is a provisional time, it is possible to easily recognize that the data was recorded at the provisional time even when the data was confirmed after the date. It becomes possible.

It is a block diagram which shows an example of the functional block of the drive recorder main body 100 which concerns on Embodiment 1, 2 of this invention. It is a figure which shows an example of the folder structure for event recording in the external memory 107 shown in FIG. In Embodiment 1 of this invention, it is the figure which showed the detail in the external memory at the time of overwrite recording at the time of correct time setting. In Embodiment 1 of this invention, it is the figure which showed the detail in the external memory at the time of overwrite recording at the time of an incorrect time setting. It is a flowchart which shows an example of the time setting process of the drive recorder in Embodiment 1 of this invention. It is a flowchart which shows an example of the setting of the provisional time of a drive recorder, and a recording process in Embodiment 2 of this invention. It is a flowchart following FIG. It is a block diagram which shows an example of the functional block of the drive recorder main body 200 which concerns on Embodiment 3 of this invention. It is a flowchart which shows an example of the process of the drive recorder in Embodiment 3 of this invention.

Embodiment 1 FIG.
1 is a block diagram showing an example of functional blocks of a drive recorder main body 100 according to Embodiment 1 of the present invention. The drive recorder shown in FIG. 1 is a data processing apparatus including a data recording unit 108 that records recording data including time information in an external memory 107 as a data storage unit when a recording data write request occurs. An activation detection unit 101 that detects ON / OFF of the power supply, a time state detection unit 102 that detects whether the time has been set, a time state holding unit 103 that holds the time setting state, and a time state holding unit 103 A time setting unit 104 for newly setting the time based on the detection information of the time state detection unit 102 and the recording data in the external memory 107, and a time for updating the time set by the time setting unit 104 in synchronization with the RTC. Update unit 105 and external memory I / F unit 106 which is an interface device for connecting drive recorder main body 100 and external memory 107 The provided, the data recording unit 108, when the write request generation of recording data, have been made to record data including time information updated by the time updating unit 105 to record in the external memory 107. Here, the external memory 107 is a non-volatile memory that stores a setting file and recording data. As an example, there is an SD card or the like. The external memory I / F unit 106 includes an SD card connector as an example. Although data, audio, time, and the like can be considered as data, other than time is not shown here.

  In the following description of the first embodiment and the second embodiment, what is described as “to part” may be “to means”, “to circuit”, and “to device”. -Step "," -procedure "," -process "may be used. That is, what is described as “˜unit” may be realized by firmware. Alternatively, it may be implemented only by software, or only by hardware such as elements, devices, substrates, and wirings, by a combination of software and hardware, or by a combination of firmware.

  FIG. 2 is a diagram showing an example of the configuration of an event recording folder in the external memory 107. An event recording folder is created for each event occurrence, and the acquired data is recorded in the folder. Since the size of the external memory 107 is limited, a data retention upper limit number is set in advance (the retention upper limit number is 20 in FIG. 2). The folder name includes time information at the time of data recording. For example, when the data recording process to the external memory unit 107 starts on August 28, 2009 at 10:20:30, the folder name includes time information of “090828102030”.

  As described above, a drive recorder device (hereinafter also referred to as a drive recorder) is installed in a vehicle such as an automobile, and when an accident occurs, an accident occurs by recording data such as images and sound during the operation. This is a device for clarifying the cause, and in recent years, it is also spreading to the general public. The drive recorder stores a camera (such as a CCD camera) that records video, a microphone that captures audio, an acceleration sensor that detects accidents and impacts such as sudden braking and sudden steering, and data for a predetermined time before and after the impact. It consists of an SD card.

  Data storage processing will be described using the configuration shown in FIG. When the data recording unit 108 detects an impact such as an accident, sudden braking, or sudden steering wheel, the data recording unit 108 acquires the time at the time of detection from the time update unit 105 and includes the time information acquired in the SD card as the external memory 107 in the name Create a folder. Thereafter, data such as video and audio is stored in the created folder. Further, as shown in FIG. 3, when the event recording folder is stored in the SD card up to the upper limit number of data retention, the data recording unit 108 thereafter adds new data to the oldest data stored in the SD card. Overwrite and record.

  Here, considering the case where the time of the drive recorder is not set correctly, the latest data is always overwritten and recorded, as shown in FIG. 4, as shown in FIG. It will not be a recording process. For this reason, even when the time cannot be set correctly, it is necessary to perform processing so that the oldest data can be overwritten and recorded.

  FIG. 5 is a flowchart showing an example of the time setting process of the drive recorder in the first embodiment of the present invention. In the first embodiment, overwriting of the latest data is prevented by resetting the time to a time later than the time of the data recorded in the SD card.

  When the activation detection unit 101 detects that the ACC power supply of the drive recorder is turned on (S100), the time state detection unit 102 sets the time setting state (time set / time not set) stored in the time state holding unit 103. Check (S101). If the time has already been set (S102 YES), the time setting has already been performed and the time setting process is terminated. When the time has not been set (NO in S102), the time setting unit 104 receives a time non-set signal from the time state detection unit 102, and a recording folder exists in the external memory 107 via the external memory I / F unit 106. Is checked (S103). When the recording folder exists in the external memory 107 (YES in S104), the time setting unit 104 reads the time information described in the recording folder name in the external memory 107 via the external memory I / F unit 106 (S105). ). Thereafter, time information closest to the current time is selected from the read time information, and a time obtained by adding + α (for example, 1 second) to the selected time is set in the drive recorder main body 100 (S106). When the recording folder does not exist in the external memory 107 (NO in S104), the time setting unit 104 sets a pre-embedded time in the drive recorder main body 100 (S107).

  As described above, according to the first embodiment, even when the time set in the drive recorder main body 100 is not correct, by resetting the time from the time information in the SD card, the overwriting is always performed. It becomes possible to overwrite and record the oldest data. In addition, by resetting the time from the time information in the SD card, it is possible to reduce a sense of incongruity when the user looks in the external memory as compared to before the time is reset.

  In the first embodiment, the time information is included in the folder name in the SD card, but this does not prevent the time information from being included in other places. For example, time information may be included in the file name, or time information may be used as a file time stamp.

  Further, in the first embodiment, when the time state detection unit (102) detects that the time is not set, an HMI (Human Machine Interface) such as an LED or a buzzer is used as an output unit to notify the user. Although not done, it does not interfere with these processes. By notifying the user, it is possible to quickly notify the user that the set time information is a provisional time.

  In the first embodiment, the case where data is recorded on the SD card when an event occurs has been described. However, the present invention can also be executed when data is always recorded on the SD card regardless of the occurrence of an event. For example, the present embodiment can be executed even when data for one minute is always recorded as one file on the SD card, and when the data is full, the oldest file is overwritten and recorded.

Embodiment 2. FIG.
In the first embodiment, the oldest data can always be overwritten and recorded by setting the time from the time information in the SD card. However, the set time is only a “provisional” time. Therefore, if you check the data immediately after recording, you are likely to notice that it is a tentative time, but if you check the data after the day has passed, you may not notice that it is a tentative time Becomes higher. In the second embodiment, a process will be described in which the user can easily recognize that the data is recorded at a provisional time.

  The configuration of the second embodiment is the same as that shown in FIG.

  6 and 7 are flow charts showing an example of provisional time setting and recording processing of the drive recorder according to Embodiment 2 of the present invention.

  In FIG. 6, when the activation detection unit 101 detects that the power (ACC) of the drive recorder is ON (S200), the time state detection unit 102 sets the time setting state (time set / set) stored in the time state holding unit 103. (Time not set) is checked (S201). If the time has already been set (S202 YES), the time setting has already been performed, and the time setting process is terminated. When the time has not been set (NO in S202), the time setting unit 104 receives a time non-set signal from the time state detection unit 102, and a recording folder exists in the external memory 107 via the external memory I / F unit 106. To check.

  When the recording folder exists in the external memory 107 (S204 YES), the time setting unit 104 reads the time information described in the recording folder name in the external memory 107 via the external memory I / F unit 106 (S205). ). Thereafter, time information closest to the current time is selected from the read time information, and a time obtained by adding + α (for example, 1 second) to the selected time is set in the drive recorder main body 100 (S206). When the recording folder does not exist in the external memory 107 (NO in S204), the time setting unit 104 sets a time embedded in advance in the drive recorder main body 100 (S207). After performing S206 or S207, the time setting unit 104 retains information that the provisional time has been set (S208).

  Thereafter, the process proceeds to FIG. 7, and when data recording to the external memory 107 is started due to an impact or the like (YES in S209), the data recording unit 108 holds whether the provisional time is set or not in S208 by the time setting unit 104 A folder for storing recording data in the external memory 107 is generated based on the determined information. As a result of the determination, if it is a provisional time (YES in S210), the folder name is added with a character “_Z” indicating the provisional time (S211). For example, when the data recording start time is “August 25, 2009 10:10:30”, the folder name is “090825101030_Z”. When it is not the provisional time (NO in S210), the letter “_Z” indicating the provisional time is not added to the folder name (S212). Thereafter, the data recording unit 108 records data in the created folder (S213). If ACC is not OFF after the data recording is completed (NO in S214), the process returns to S209 and waits for the start of recording of the next data. The process ends when ACC is OFF (S214 YES).

  As described above, according to the second embodiment, even when the time set in the drive recorder main body 100 is not correct, by resetting the time from the time information in the SD card, the overwriting is always performed. It becomes possible to overwrite and record the oldest data.

  In addition, by resetting the time from the time information in the SD card, it is possible to reduce a sense of incongruity when the user looks in the external memory as compared to before the time is reset. Further, by adding a character indicating the provisional time ("_Z" in the second embodiment) to the folder name, even when the data is confirmed after the date, it is easily recorded at the provisional time. It becomes possible to recognize that.

  In the second embodiment, the folder name in the SD card includes characters indicating the provisional time, but prevents other places from including characters indicating the provisional time. is not. For example, it may be possible to include a character indicating the provisional time in the file name.

  In the second embodiment, when the time state detection unit (102) detects that the time has not been set, an HMI (Human Machine Interface) such as an LED or a buzzer is used as an output unit to notify the user. Although not done, it does not interfere with these processes. By notifying the user, it is possible to quickly notify that the set time information is a provisional time.

  In the second embodiment, the case where data is recorded on the SD card when an event occurs has been described. However, the present invention can also be executed when data is always recorded on the SD card regardless of the occurrence of an event. For example, it is conceivable to record one minute of data as one file, including characters indicating the provisional time in all files.

Embodiment 3 FIG.
In the first and second embodiments, the oldest data can always be overwritten and recorded by setting the time from the time information in the SD card. In the third embodiment, a process is described in which the oldest data can always be overwritten by a method other than the time setting.

  FIG. 8 is a block diagram showing an example of functional blocks of the drive recorder main body 200 according to Embodiment 3 of the present invention. In FIG. 8, the same parts as those shown in FIG. A drive recorder main body 200 shown in FIG. 8 is a data processing device that records recording data including a sequence number in an external memory 107 as a data storage unit when a recording data write request is generated.

  The drive recorder shown in FIG. 8 increments (updates) the sequential number holding unit 201 that holds the number of folders generated by data recording as a sequence number and the number of folders generated by the data recording held by the sequential number holding unit 201. A serial number update unit 202 is provided, and the data recording unit 108 records data including the sequence number updated by the serial number update unit 202 in the data storage unit 107 when a recording data write request is generated.

  FIG. 9 is a flowchart showing an example of processing of the drive recorder according to Embodiment 3 of the present invention. It is assumed that the initial value “0000” is recorded in a flash ROM (Read Only Memory) so that the initial value “0000” can be held after the ACC is turned off at the time of product shipment.

  When the activation detection unit 101 detects that the power (ACC) of the drive recorder is ON (S300), the serial number update unit 202 stores information held by the serial number holding unit 201 (number of folders generated by data recording = sequence number). Obtain (S301). Thereafter, nothing is performed until data recording to the external memory 107 is started due to an impact or the like (NO in S302). When data recording to the external memory 107 is started due to an impact or the like (YES in S302), the serial number update unit 202 increments the information (sequence number) acquired from the serial number holding unit 201 by 1 (S303). Thereafter, the serial number updating unit 202 sends the incremented number to the data recording unit 108 and the serial number holding unit 201 (S304). Thereafter, the serial number holding unit 201 stores the data sent from the serial number update unit 202 (S305). When creating a folder in the external memory 107, the data recording unit 108 creates the folder name by including the number sent from the serial number updating unit 202 (S306), and stores the data in the folder (S307). . If ACC is not OFF after the data recording is completed (NO in S308), the process returns to S202 and waits for the start of recording of the next data. The process ends with ACC OFF (S308 YES).

As described above, according to the third embodiment, even when the time set in the drive recorder main body 200 is incorrect, the folder generation count (sequence number) at the time of data recording is held in the drive recorder main body, By sometimes including the folder generation count in the folder name, it is possible to always overwrite and record the oldest data during overwriting.
Also, when the recorded data is played back by a PC application (viewer application), processing is prepared such that the playback order can be quickly determined by the sequence number, and the load on the PC is reduced.

  In the third embodiment, the folder name in the SD card includes the number of times the folder is generated at the time of data recording. However, this does not prevent the time information from being included elsewhere. For example, it is also possible to separately generate a file with the number of times of folder generation at the time of data recording and describe the folder name and the number of times of folder generation at the time of data recording in the file.

  In the third embodiment, the value of the serial number holding unit 201 is recorded in the flash ROM so that it can be held even after the ACC is turned off. However, the serial number information is read from the external memory 107 and read. It does not preclude storing a larger value in the serial number holding unit 201. In this case, it may be stored in the RAM instead of the flash ROM.

  In the third embodiment, the case where data is recorded on the SD card when an event occurs has been described. However, the present invention can also be executed when data is always recorded on the SD card regardless of the occurrence of an event. For example, data for one minute is always recorded as one file on an SD card, and the file name is included in the file name, so that the oldest data can always be overwritten and recorded.

  Each of the first to third embodiments has been described by taking a drive recorder as an example. However, each configuration of the drive recorder is defined as a data processing apparatus and method, and a program configuration for causing a computer to function. It can be used and the scope of application of the invention can be expanded.

  DESCRIPTION OF SYMBOLS 100 Drive recorder main body, 101 Start detection part, 102 Time state detection part, 103 Time state holding part, 104 Time setting part, 105 Time update part, 106 External memory I / F part, 107 External memory, 108 Data recording part, 200 Drive recorder body, 201 sequence number holding unit, 202 sequence number updating unit.

Claims (11)

A data processing device that records recording data including time information in a data storage unit when a recording data write request occurs,
A time state holding unit for holding a time setting state;
A time state detection unit for detecting whether or not a time has been set in the time state holding unit;
A time setting unit for setting a time based on detection information of the time state detection unit and stored data of the data storage unit;
A time updating unit for updating the time set by the time setting unit;
During the write request generation of recording data, Bei example a data recording unit for recording the recording data including time information updated by the time updating unit in the data storage unit,
The time setting unit reads time information stored in the data storage unit when a time non-setting is detected by the time state detection unit, and adds a predetermined time to the latest time among the read times Is set as a set time . The data processing apparatus according to claim 1 ,
The data storage device is characterized in that the time information is stored in a folder name or a file name for storing recording data. The data processing apparatus according to claim 1 ,
The data storage device stores the time information as a time stamp of a file storing recording data. The data processing apparatus according to claim 1 ,
The data storage unit stores the time information in a folder name or file name for storing recorded data, and stores the time information as a time stamp of the file. . In the data processing device according to any one of claims 1 to 4 ,
A data processing apparatus, further comprising: an output unit that outputs a result when a time non-set is detected by the time state detection unit. In the data processing device according to any one of claims 1 to 5 ,
In the data recording unit, the time information included in the recording data recorded in the data storage unit is a provisional time when a time non-setting is detected by the time state detection unit when a recording data write request is generated A data processing device characterized by writing characters that can be understood. The data processing device according to any one of claims 1 to 6 , wherein the data processing device is at least a part of a drive recorder device attached to a vehicle. A data processing method for recording recording data including time information in a data storage unit when a recording data write request occurs,
A time state holding step for holding a time setting state;
A time state detecting step for detecting whether or not the time has been set by the time state holding step;
A time setting step for setting a time based on detection information obtained by the time state detection step and data stored in the data storage unit;
A time update step for updating the time set in the time setting step;
During the write request generation of recording data, Bei example a data recording step of recording the recording data including time information updated by the time updating step in the data storage unit,
The time setting step reads time information stored in the data storage unit when a time non-setting is detected by the time state detection step, and adds a predetermined time to the latest time among the read times Is set as the set time . The data processing method according to claim 8 , wherein
A data processing method, further comprising: an output step of outputting a result when a time non-set is detected by the time state detection step. The data processing method according to claim 8 or 9 ,
In the data recording step, the time information included in the recording data recorded in the data storage unit is a provisional time when a time non-setting is detected by the time state detection step when a recording data write request is generated A data processing method characterized by writing characters that can be understood. A computer that records recording data including time information in a data storage unit when a recording data write request occurs;
Time state holding means for holding the time setting state;
Time state detection means for detecting whether or not time has been set in the time state holding means;
Time setting means for setting time based on detection information of the time state detection means and data stored in the data storage unit;
Time update means for updating the time set by the time setting means;
A program for functioning as data recording means for recording recording data including time information updated by the time updating means in the data storage section when a recording data write request occurs ,
The time setting unit reads time information stored in the data storage unit when a time non-setting is detected by the time state detection unit, and adds a predetermined time to the latest time among the read times Set as the set time
A program characterized by that .

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