JP7069864B2 - Data storage and programs - Google Patents

Description

The disclosure by this specification relates to data storage devices and programs.

Conventionally, a data storage device used for storing a plurality of information in a vehicle is known. The apparatus disclosed in Patent Document 1 can be applied to, for example, a drive recorder. This device acquires a plurality of pieces of information and writes them in one of the two storage media. When an abnormality in data writing to one storage medium is detected, a plurality of pieces of information are switched to be written to the other storage medium.

Japanese Unexamined Patent Publication No. 2013-140485

By the way, in a data storage device for vehicle use, for example, when a collision accident occurs in a vehicle, the communication with a part of the information acquisition source is cut off, or the part of the information acquisition source itself is It is assumed that it will be destroyed and will not function. However, the device of Patent Document 1 has no means for dealing with such an unforeseen situation. Therefore, it is desired that the information that can be acquired can be appropriately stored not only when the information is acquired normally but also in an unexpected situation.

One object disclosed is to provide a data storage device and program capable of appropriately storing information.

One aspect disclosed herein is a data storage device used to store a plurality of pieces of information in a vehicle.
The information acquisition unit (26) that acquires multiple pieces of information,
A file generation unit (29) that generates a file to be stored as electronic data for a plurality of information acquired by the information acquisition unit is provided.
The file generator is
A container file generator (30) that generates a container file that summarizes multiple pieces of information,
An individual file generation unit (31) that generates an individual file in which a plurality of pieces of information are divided, and
When multiple pieces of information are acquired normally, the container file generator generates a container file, and if an error occurs in the acquisition of specific information among multiple pieces of information, the individual file generator switches to generate an individual file. Switching unit (32) and
Dummy data about information other than specific information to generate a file selected by the switching unit among container files or individual files when an error occurs in the acquisition of information other than specific information among multiple pieces of information. It has a dummy data generation unit (33) for generating the above .

According to such a data storage device, a container file that summarizes a plurality of information is generated in a state where a plurality of information is normally acquired, and if an abnormality occurs in the acquisition of a specific information among the plurality of information, a plurality of information are stored. The information is switched so that a separate file is generated. That is, in the normal state, since a plurality of pieces of information are collected in a container file, the number of files to be generated is suppressed, the burden on the data storage destination is reduced, and the information can be easily analyzed after the fact. .. On the other hand, in the event of an abnormality, since a plurality of pieces of information are divided into individual files, the information that can be acquired other than the specific information in which the abnormality has occurred can be stored as much as possible. As described above, it is possible to provide a data storage device capable of appropriately storing information.

One aspect disclosed herein is a program used to store multiple pieces of information in a vehicle.
At least one arithmetic unit (20),
The information acquisition unit (26) that acquires multiple pieces of information,
A plurality of information acquired by the information acquisition unit is made to function as a file generation unit (29) that generates a file to be stored as electronic data.
The file generator is
A container file generator (30) that generates a container file that summarizes multiple pieces of information,
An individual file generation unit (31) that generates an individual file in which a plurality of pieces of information are divided, and
When multiple pieces of information are acquired normally, the container file generator generates a container file, and if an error occurs in the acquisition of specific information among multiple pieces of information, the individual file generator switches to generate an individual file. Switching unit (32) and
Dummy data about information other than specific information to generate a file selected by the switching unit among container files or individual files when an error occurs in the acquisition of information other than specific information among multiple pieces of information. It includes a dummy data generation unit (33) for generating the above.

According to such a program, the arithmetic unit can function as the above-mentioned data storage device.

It should be noted that the reference numerals in parentheses exemplify the correspondence with the parts of the embodiments described later, and are not intended to limit the technical scope.

It is a block diagram of the system including the data storage device of 1st Embodiment. It is a block diagram which shows the functional block by the arithmetic storage part of 1st Embodiment. It is a figure which shows the schematic structure of the container file of 1st Embodiment. It is a figure which shows the schematic structure of the individual file of 1st Embodiment. It is a time chart for demonstrating the switching of the generated file of 1st Embodiment. It is a flowchart by the file generation part of 1st Embodiment. It is a flowchart by the file generation part of 2nd Embodiment.

Hereinafter, a plurality of embodiments will be described with reference to the drawings. By assigning the same reference numerals to the corresponding components in each embodiment, duplicate description may be omitted. When only a part of the configuration is described in each embodiment, the configuration of the other embodiment described above can be applied to the other parts of the configuration. Further, not only the combination of the configurations specified in the description of each embodiment but also the configurations of a plurality of embodiments can be partially combined even if the combination is not specified. ..

(First Embodiment)
As shown in FIG. 1, the data storage device 100 according to the first embodiment of the present disclosure is a drive recorder (also referred to as a scenario recorder or an event recorder) used for storing a plurality of types of information in a vehicle. The data storage device 100 is mounted on a vehicle, acquires a plurality of information from various information acquisition sources such as the vehicle, and stores the data as electronic data. More specifically, when a scenario to be stored such as a collision accident or a hiyari hat occurs in a vehicle, the data storage device 100 stores information related to the scenario in the storage medium 23.

Such a data storage device 100 has a plurality of interfaces 10a, 10b, 10c, 10d, a GPS receiving unit 12, a detection unit 14, and an arithmetic storage unit 20.

The plurality of interfaces 10a, 10b, 10c, and 10d are formed so as to be able to input signals from the acquisition source to the arithmetic storage unit 20 by being electrically connected to various information acquisition sources of the vehicle. ing.

For example, the interface 10a is electrically connected to the camera 2 by a wire harness including a plurality of electric wires. The camera 2 is mounted on the vehicle and is configured to photograph the outside world or the inside of the vehicle. The camera 2 photographs the outside world by forming an image of light from the outside world or the inside of a vehicle on an image sensor such as a CCD sensor or a CMOS sensor using a lens system. The camera 2 can output the captured video as a video signal to the arithmetic storage unit 20 of the data storage device 100.

The interface 10b is electrically connected to the microphone 3 by a wire harness including a plurality of electric wires. The microphone 3 is mounted on a vehicle and is configured to collect ambient sounds. The microphone 3 can output the collected environmental sound as an audio signal to the arithmetic storage unit 20 of the data storage device 100.

The interface 10c is electrically connected to the biometric information sensor 4 by a wire harness including a plurality of electric wires. The biological information sensor 4 is mounted on a vehicle and is configured to detect biological information. The biological information sensor 4 of the present embodiment detects, for example, the face orientation of the driver of the vehicle, the eye open state, and the like. The biological information sensor 4 can output the detected driver information as a biological information signal to the arithmetic storage unit 20 of the data storage device 100.

The interface 10d is electrically connected to the microcomputer on the vehicle side by a wire harness including a plurality of electric wires. Various vehicle signals representing the behavior of the vehicle, such as a vehicle speed signal, an engine rotation signal, a brake signal, and a winker signal, are input to the arithmetic storage unit 20 of the data storage device 100 via the interface 10d.

Further, the data storage device 100 is connected to the bus wiring to enable communication through an in-vehicle LAN (Local Area Network) such as CAN (registered trademark). Through the in-vehicle LAN, a safety equipment operation signal indicating that the safety equipment has been activated is input to the arithmetic storage unit 20 of the data storage device 100. Examples of the safety equipment operation signal include an airbag deployment signal indicating whether or not the airbag has been deployed.

The connection method between the data storage device 100 and various information acquisition sources of the vehicle is not limited to the above-mentioned connection method, and any method including wireless connection and the like can be adopted.

The GPS receiving unit 12 can detect the current position and the current time of the vehicle by receiving radio waves from the artificial satellite. The GPS receiving unit 12 can output a GPS signal based on the received radio wave to the arithmetic storage unit 20.

The detection unit 14 has a gyro sensor 15 and an acceleration sensor 16. The gyro sensor 15 detects the angular velocity or the angular acceleration of the vehicle. The acceleration sensor 16 detects the acceleration of the vehicle. The detection unit 14 can output the information detected by the gyro sensor 15 and the acceleration sensor 16 to the calculation storage unit 20 as a detection signal.

The arithmetic storage unit 20 is realized by using an electronic circuit mounted on a substrate, and has a CPU (Central Processing Unit) 21 and a plurality of storage media 22, 23, 24. And it is a storage unit. The CPU 21 can perform various processes by executing, for example, a computer program (hereinafter, simply referred to as a program) stored in the storage medium 24 among the plurality of storage media 22, 23, 24.

The storage medium 22 is a volatile memory used for temporary storage, and is, for example, a DRAM (Dynamic Random Access Memory).

The storage medium 23 is a non-volatile memory that functions as a non-transitional substantive storage medium that stores the above-mentioned program non-temporarily and stores a plurality of information as electronic data. The storage medium 23 is, for example, an eMMC (embedded Multi Media Card) using a flash memory, and is mounted on a substrate in a form that cannot be easily attached and detached. The storage medium 23 is designed so that data cannot be easily rewritten from the outside in order to prevent falsification.

The storage medium 24 is a non-volatile memory that stores a plurality of information as electronic data, and is, for example, an SD card using a flash memory. The storage medium 24 is removable and replaceable with respect to the data storage device 100.

In this way, the arithmetic storage unit 20 is provided by a set of computer resources linked by the CPU 21 and the plurality of storage media 22, 23, 24. By being executed by the arithmetic storage unit 20, the program causes the data storage device 100 to function as the device described in this specification, and functions the data storage device 100 to execute the method described in this specification. Let me.

The means and / or functions provided by the data storage device 100 may be provided by software stored in a substantive storage medium 23 and a computer, software only, hardware only, or a combination thereof that execute the software. can. For example, when the arithmetic storage unit 20 is provided by an electronic circuit which is hardware, it can be provided by a digital circuit including a large number of logic circuits or an analog circuit.

As shown in FIG. 2, the arithmetic storage unit 20 has an information acquisition unit 26, a buffering unit 27, a scenario detection unit 28, a file generation unit 29, and data writing as functional blocks expressed by executing a program. It has a part 34.

The information acquisition unit 26 acquires a plurality of information. Specifically, the information acquisition unit 26 acquires the video information of the camera 2 from the video signal as information, and acquires the voice information of the microphone 3 from the voice signal. Further, the information acquisition unit 26 acquires the driver's information by the biological information signal, and acquires the information about the behavior of the vehicle by various vehicle signals. This information is acquired at any time, for example, every 100 ms.

The buffering unit 27 performs buffering for temporarily storing a plurality of information acquired by the information acquisition unit 26 in the storage medium 22. The buffering unit 27 buffers the information acquired in the past several minutes, for example. Information older than this period has elapsed is deleted because the capacity of the storage medium 22 is limited.

The electronic data buffered in the storage medium 22 is stored by converting various digital signals into data in an original state or a state close to the original. For example, the image from the camera 2 is stored in the format of RAW data.

The scenario detection unit 28 detects whether or not a scenario to be stored has occurred. Specifically, the scenario detection unit 28 acquires information on the operating state of the safety equipment from the safety equipment operation signal, acquires the acceleration and angular velocity or angular acceleration of the vehicle detected by the detection unit 14, and obtains these information as predetermined. It is detected whether or not a scenario to be memorized has occurred by applying it to a conditional expression or comprehensively judging this information.

The file generation unit 29 generates an electronic file to be stored as electronic data for a plurality of information acquired by the information acquisition unit 26. In the present embodiment, the file generation unit 29 generates a file when the scenario detection unit 28 detects the occurrence of a scenario to be stored, and if not, the file is not generated. Specifically, when the occurrence of a scenario to be stored is detected, the file generation unit 29 converts the data buffered in the storage medium 22 into a format for continuous storage to generate a file. Data compression may be performed with this form of conversion.

The data writing unit 34 writes the data of the file generated by the file generation unit 29 to the storage medium 23 or the storage medium 24 as the non-volatile memory. In the present embodiment, the data writing unit 34 basically writes the data of the file to the storage medium 23. That is, since the written data may be used, for example, for analysis and verification of a collision accident, if the data is stored in the removable storage medium 24, it can be easily tampered with. Therefore, writing to the storage medium 23, which is more difficult to falsify, is preferable.

The file generation unit 29 and the data writing unit 34 do not permanently generate a file and continue writing, but stop the operation of file generation and writing to the storage medium 23, for example, after a few minutes have passed after the collision accident. do.

Further, when the free space of the storage medium 23 is insufficient, the data writing unit 34 may write the data of the file to the storage medium 24.

Therefore, the usage of information regarding the storage of the information of the plurality of storage media 22, 23, 24 is as follows. The storage medium 22 is mainly used for buffering a plurality of information acquired by the data storage device 100. The storage medium 23 is used for continuous storage of scenarios to be stored. The storage medium 24 is used as a preliminary for expanding the storage capacity of the entire device 100, and is also used for taking out the data stored in the storage medium 23 to the outside of the device 100.

Now, the format of the file generated by the file generation unit 29 will be described in more detail. The file generation unit 29 generates a container file as a file in a state where a plurality of information is normally acquired, and generates an individual file as a file when an abnormality occurs in the acquisition of specific information among the plurality of information. It has become.

In order to realize such file generation, the file generation unit 29 has a container file generation unit 30, an individual file generation unit 31, a switching unit 32, and a dummy data generation unit 33 as functional blocks.

The container file generation unit 30 generates a container file. As shown in FIG. 3, the generated container file is a file that summarizes a plurality of information acquired by the information acquisition unit 26, and can include a plurality of different types of data. In particular, in this embodiment, the MP4 format (extension is, for example, .mp4) as a digital multimedia container file format is adopted as the file format of the container file.

The container file of the present embodiment includes video information data, audio information data, I / O data, and metadata. The video information data is obtained by converting the video information of the camera 2 into data among the plurality of information acquired by the information acquisition unit 26. The voice information data is the voice information of the microphone 3 converted into data among the plurality of information acquired by the information acquisition unit 26. The I / O data is the information acquired by the information acquisition unit 26, excluding the video information and the audio information, and is the information on the driver's information and the behavior of the vehicle. The I / O data has a simple data structure and data characteristics as compared with video information data and audio information data, such as a numerical value representing a physical quantity or a flag value for representing a state. Metadata is data for synchronizing various data stored in a container file. The metadata includes the definition of each data, time information, and the like.

Such a container file is generated as one file, for example, by collecting information for one minute, which is shorter than the buffering period. By collecting a plurality of pieces of information into one container file in this way, the number of generated files can be suppressed. By reducing the number of times the data writing unit 34 writes to the storage medium 23, deterioration of the storage medium 23 is suppressed, and the life of the data storage device 100 can be expected to be extended.

The individual file generation unit 31 generates an individual file. As shown in FIG. 4, the generated individual file is a file obtained by dividing a plurality of information acquired by the information acquisition unit 26 into a container file. That is, the individual file is a file that is individually generated in a state where a plurality of information acquired by the information acquisition unit 26 are separated without being combined into one file. The individual file does not need to be further divided from the multiple information acquisition stages. The sorting may be performed by sorting a plurality of pieces of information for each information acquisition source, or for each type of information or data characteristics. The individual file generation unit 31 generates a plurality of individual files, if possible. The plurality of individual files have different file formats from each other.

In particular, in this embodiment, the format of the individual file corresponding to the video information data is the M4V format (extension is, for example, .m4v). The format of the individual file corresponding to the voice information data is the AAC format (extension is .aac). The format of the individual file corresponding to the I / O data is a general-purpose format (DAT file, extension is .dat). Of the information data acquired by the information acquisition unit 26, the I / O data is collected in one individual file.

The switching unit 32 switches between a state in which the container file generation unit 30 generates a container file and a state in which the individual file generation unit 31 generates an individual file.

In detail, the switching unit 32 determines whether or not an abnormality has occurred in the acquisition of specific information among the plurality of information. In the present embodiment, the specific information corresponds to video information and audio information among a plurality of pieces of information, and does not correspond to driver information and vehicle behavior information. As a corresponding criterion of specific information, the problem is whether or not it becomes difficult to generate a container file when an abnormality occurs in the acquisition of the information.

As a situation in which the occurrence of an abnormality is recognized, when a collision accident occurs in a vehicle, for example, a signal is sent to the arithmetic storage unit 20 due to poor contact or disconnection of the wire harness connecting the interfaces 10a and 10b and the information acquisition source. Examples include a situation in which the information is not input, and a situation in which the information acquisition source itself is destroyed and the signal is not input to the arithmetic storage unit 20.

That is, if the input of the video signal related to the video information or the audio signal related to the audio information is interrupted in the situation where the occurrence of the abnormality is recognized, for example, the generation of the metadata of the container file itself cannot be performed normally due to its nature. As a result, it becomes impossible to generate the container file itself. Therefore, in the present embodiment, the video information and the audio information are controlled so as to correspond to the specific information. On the other hand, the information on the driver and the information on the behavior of the vehicle do not interfere with the generation of the container file itself due to the nature of the data, so that the information is controlled so as not to correspond to the specific information.

Thus, in a state where the information acquisition unit 26 normally acquires a plurality of information to be acquired, the container file generation unit 30 is controlled to generate the container file. Then, when an abnormality is found in the acquisition of the specific information in the above determination, the switching unit 32 switches the control so that the individual file generation unit 31 generates the individual file. As a result, in a state where the container file cannot be generated, the situation where the file is not generated at all and no information is stored is avoided as much as possible.

Here, the individual file corresponding to the specific information in which the occurrence of the abnormality is found is not generated, and the individual file of the other information is generated. For example, as shown in FIG. 5, when an abnormality occurs in the acquisition of video information from the camera 2, an individual file corresponding to audio information and an individual file corresponding to I / O data are generated.

Further, the switching unit 32 of the present embodiment causes the individual file generation unit 31 to continue the generation of the individual file when the specific information is normally acquired after the abnormality occurs in the acquisition of the specific information. It has become like.

The dummy data generation unit 33 is a dummy for generating a file selected by the switching unit 32 among the container file or the individual file when an abnormality occurs in the acquisition of information other than the specific information among the plurality of information. Generate data. For example, when the input of various vehicle signals to the arithmetic storage unit 20 is interrupted, the dummy data generation unit 33 generates dummy data (for example, a numerical value that cannot actually be obtained) for the information that could not be acquired. Store the dummy data in the corresponding part of the data corresponding to the selected file. As a result, the file generation unit 29 continues to generate the file as if there were no abnormality.

Hereinafter, in the process executed by the data storage device 100 of the first embodiment, the process executed by the file generation unit 29 will be described with reference to the flowchart of FIG.

First, in step S11, the container file is generated in a state where the information acquisition unit 26 normally acquires a plurality of information to be acquired. After the process of step S11, the process proceeds to step S12.

In step S12, it is determined whether or not an abnormality has occurred in the acquisition of specific information regarding the information scheduled to be stored in the file to be generated next. If a negative determination is made in step S12, the process proceeds to step S13. If an affirmative determination is made in step S12, the process proceeds to step S15.

In step S13, since no abnormality has occurred in the acquisition of the specific information, the generation of the container file is continued. After the process of step S13, the process proceeds to step S14.

In step S14, it is determined whether to end the operation of file generation. For example, after a predetermined time has passed after the collision accident, file generation and data writing are stopped. If a negative determination is made in step S14, the process returns to step S12 again to determine whether or not an abnormality has occurred in the acquisition of specific information. If an affirmative determination is made in step S14, a series of processes is terminated in step S14.

On the other hand, in step S15 when an abnormality occurs in the acquisition of specific information, the generation of the container file is switched to the generation of the individual file. A series of processes is completed by step S14. In the present embodiment, once the switching is performed, an individual file is generated instead of the container file until the data storage device 100 is restarted.

Further, the file recorded for the scenario is taken out by copying to the storage medium 24, and is analyzed by computer work by an analyst, for example. When switching is performed by the switching unit 32, the analyst manually connects the switching portions between the container file and the individual file and analyzes the file.

(Action effect)
The effects of the first embodiment described above will be described again below.

According to the data storage device 100 of the first embodiment, when a plurality of information is normally acquired, a container file summarizing the plurality of information is generated, and an abnormality occurs in the acquisition of specific information among the plurality of information. , Switches so that multiple pieces of information are generated as individual files. That is, in the normal state, since a plurality of pieces of information are collected in a container file, the number of files to be generated is suppressed, the burden on the data storage destination is reduced, and the information can be easily analyzed after the fact. .. On the other hand, in the event of an abnormality, since a plurality of pieces of information are divided into individual files, the information that can be acquired other than the specific information in which the abnormality has occurred can be stored as much as possible. As described above, it is possible to provide a data storage device 100 capable of appropriately storing information.

Further, according to the first embodiment, after an abnormality occurs in the acquisition of the specific information, the generation of the individual file is continued when the specific information is returned to the normal acquisition state. By doing so, the number of switchings between the container file and the individual file can be minimized, so that it is possible to reduce the trouble of connecting the container file and the individual file in the analysis of the information after the fact. Therefore, it becomes easy to analyze the information after the fact.

Further, according to the first embodiment, since the video information is included in the specific information, even if an abnormality occurs in the acquisition of the video information, the information other than the video information is divided into individual files and generated. Therefore, the information that can be acquired can be stored as much as possible.

Further, according to the first embodiment, since the specific information includes the voice information, even if an abnormality occurs in the acquisition of the voice information, the information other than the voice information is divided into individual files and generated. Therefore, the information that can be acquired can be stored as much as possible.

Further, according to the first embodiment, when an abnormality occurs in the acquisition of information other than the specific information, the information other than the specific information for generating the file selected as the generation target among the container file or the individual file is obtained. Dummy data is generated. By doing so, when an abnormality occurs in the acquisition of information other than specific information, by generating a file in which the information is replaced with dummy data, a file generation according to the state in which the information can be normally acquired can be generated. It will be possible to do. Therefore, it is not necessary to divide the file that was supposed to store the information in which the abnormality occurred, and it is possible to suppress the number of files to be generated in the situation where an abnormality occurs in the acquisition of information other than the specific information. ..

Further, according to the program of the first embodiment, when a container file summarizing a plurality of information is generated in a state where a plurality of information is normally acquired, and an abnormality occurs in the acquisition of specific information among the plurality of information, It switches so that a separate file with multiple pieces of information is generated. That is, in the normal state, since a plurality of pieces of information are collected in a container file, the number of files to be generated is suppressed, the burden on the data storage destination is reduced, and the information can be easily analyzed after the fact. .. On the other hand, in the event of an abnormality, since a plurality of pieces of information are divided into individual files, the information that can be acquired other than the specific information in which the abnormality has occurred can be stored as much as possible. As described above, it is possible to provide a program that can appropriately store information.

(Second Embodiment)
As shown in FIG. 7, the second embodiment is a modification of the first embodiment. The second embodiment will be described focusing on the differences from the first embodiment.

The switching unit 32 of the second embodiment is used again so that the container file generation unit 30 generates the container file when the specific information acquisition unit returns to the normal acquisition state after the abnormality occurs in the acquisition of the specific information. It is designed to switch.

Hereinafter, in the process executed by the data storage device 100 of the first embodiment, the process executed by the file generation unit 29 will be described with reference to the flowchart of FIG. 7.

First, in step S21, the container file is generated in a state where the information acquisition unit 26 normally acquires a plurality of information to be acquired. After the processing of step S21, the process proceeds to step S22.

In step S22, it is determined whether or not an abnormality has occurred in the acquisition of specific information regarding the information scheduled to be stored in the file to be generated next. If a negative determination is made in step S22, the process proceeds to step S23. If an affirmative determination is made in step S22, the process proceeds to step S24.

In step S23, since no abnormality has occurred in the acquisition of the specific information, the generation of the container file is continued. After the process of step S23, the process proceeds to step S25.

In step S24, since an abnormality has occurred in the acquisition of the specific information, the generation of the individual file is continued. After the process of step S24, the process proceeds to step S25.

In step S25, it is determined whether to end the file generation operation. For example, after a predetermined time has passed after the collision accident, file generation and data writing are stopped. If a negative determination is made in step S25, the process returns to step S22 again to determine whether or not an abnormality has occurred in the acquisition of specific information. If an affirmative determination is made in step S25, a series of processes is terminated in step S25.

According to the second embodiment described above, after an abnormality occurs in the acquisition of the specific information, when the state returns to the state in which the specific information is normally acquired, the process is switched again so as to generate the container file. In this way, in the restored state, the information can be collected in a container file including the specific information, so that the information that can be acquired can be stored as much as possible.

(Other embodiments)
Although the plurality of embodiments have been described above, the present disclosure is not construed as being limited to those embodiments, and is to be applied to various embodiments and combinations without departing from the gist of the present disclosure. Can be done.

Specifically, as the first modification, the configuration of a plurality of information to be stored can be appropriately changed according to the purpose of the vehicle to be mounted, the purpose of storing the information, and the like. For example, a plurality of cameras 2 or microphones 3 that are sources of information may be provided, or may be configured not to acquire information from the biometric information sensor 4.

The second modification is not limited to the abnormality that the signal related to the information is not input as in the above-described embodiment, and the abnormality in the acquisition of the specific information may include the abnormality on the data storage device 100 side. For example, when the operation of the CPU 21 becomes unstable and the specific information cannot be acquired normally, it may be determined that an abnormality has occurred in the acquisition of the specific information.

As a modification 3, the individual file generation unit 31 divides and generates individual files of information other than specific information among a plurality of information into a plurality of individual files instead of combining them into one individual file. You may.

As a modification 4, the scenario detection unit 28 may not be provided, and a plurality of information acquired by the information acquisition unit 26 may be constantly recorded.

100 Data storage device, 20 Calculation storage unit (calculation unit), 26 Information acquisition unit, 29 File generation unit, 30 Container file generation unit, 31 Individual file generation unit, 32 Switching unit

Claims (6)

A data storage device used to store multiple pieces of information in a vehicle.
The information acquisition unit (26) for acquiring the plurality of information, and
A file generation unit (29) that generates a file to be stored as electronic data for the plurality of information acquired by the information acquisition unit is provided.
The file generation unit
A container file generation unit (30) that generates a container file that summarizes the plurality of information, and
The individual file generation unit (31) that generates the individual file obtained by dividing the plurality of information, and the individual file generation unit (31).
When the container file generation unit generates the container file in a state where the plurality of information is normally acquired and an abnormality occurs in the acquisition of specific information among the plurality of information, the individual file generation unit causes the individual file. Switching unit (32) that switches to generate
Other than the specific information for generating the file selected by the switching unit among the container file or the individual file when an abnormality occurs in the acquisition of information other than the specific information among the plurality of information. A data storage device including a dummy data generation unit (33) that generates dummy data for the information of . Claim 1 in which the switching unit causes the individual file generation unit to continue generating the individual file when the specific information is normally acquired after an abnormality occurs in the acquisition of the specific information. The data storage device described in. The switching unit is requested to switch again so that the container file generation unit generates the container file when the specific information is normally acquired after an abnormality occurs in the acquisition of the specific information. Item 1. The data storage device according to item 1. The data storage device according to any one of claims 1 to 3, wherein the specific information includes video information. The data storage device according to any one of claims 1 to 4, wherein the specific information includes voice information. A program used to store multiple pieces of information in a vehicle.
At least one arithmetic unit (20),
The information acquisition unit (26) for acquiring the plurality of information, and
The plurality of information acquired by the information acquisition unit is made to function as a file generation unit (29) that generates a file to be stored as electronic data.
The file generation unit
A container file generation unit (30) that generates a container file that summarizes the plurality of information, and
The individual file generation unit (31) that generates an individual file obtained by dividing the plurality of information, and the individual file generation unit (31).
When the container file generation unit generates the container file in a state where the plurality of information is normally acquired and an abnormality occurs in the acquisition of specific information among the plurality of information, the individual file generation unit causes the individual file. Switching unit (32) that switches to generate
Other than the specific information for generating the file selected by the switching unit among the container file or the individual file when an abnormality occurs in the acquisition of information other than the specific information among the plurality of information. A program including a dummy data generation unit (33) that generates dummy data about the information of .

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