JP5557386B2 - Vehicle information recording system and vehicle information recording method - Google Patents

Description

  The present invention relates to an information recording system for a vehicle and an information recording method for a vehicle, which are composed of a drive recorder that records image data and a digital tachograph that records data relating to the operation status of the vehicle.

  Conventionally, for example, commercial vehicles such as trucks, buses and taxis have been equipped with a digital tachograph as an operation recording device that records the operation status of the vehicle, and the recorded data has been used for driver safety management and the like. Yes. A typical digital tachograph periodically acquires information on the vehicle speed and engine speed, and the vehicle travel time, travel distance, maximum speed, average speed, speed over time, speed over frequency, engine over time, The operation data obtained by quantifying the vehicle running conditions such as the number of engine over, sudden start, sudden acceleration, sudden deceleration, idling time, etc. are automatically recorded as time series information on a predetermined recording medium. As a recording medium, for example, a storage device including a non-volatile memory that is detachable from the vehicle-mounted device, such as a memory card, is often used.

  On the other hand, an increasing number of vehicles are equipped with a drive recorder which is a kind of operation recording device. In general, a drive recorder for a vehicle automatically records and saves the situation of a short time zone including information when an abnormality such as a traffic accident occurs as image information. That is, the video around the vehicle photographed by the in-vehicle camera is recorded on the recording medium as image data. In order to record long-time image data, a large-capacity recording medium is required, but a memory card or the like generally used as a recording medium for image data has a limited recording capacity. Therefore, in many cases, image data is stored in a recording medium only in a short time zone in which an abnormality such as a traffic accident occurs. The presence or absence of an abnormality such as a traffic accident can be automatically identified by using an acceleration sensor or the like.

  Such a drive recorder can reliably record the situation at the timing before and after that point as an image when a dangerous situation occurs while driving a car or when a traffic accident actually occurs. it can. Therefore, the information recorded by the drive recorder can be used as evidence when investigating the situation of an accident, or can be used for management and analysis of safe driving.

  By the way, in recent years, the possibility of mounting both the digital tachograph and the drive recorder on one vehicle is increasing. Therefore, an attempt has been made to link the operation of the digital tachograph and the operation of the drive recorder.

  For example, in Patent Document 1, the time zone before and after the occurrence of an event such as an accident is recorded by associating and recording data generated by both the digital tachograph and the drive recorder, and providing useful data for subsequent analysis and the like. is suggesting. Specifically, Patent Document 1 discloses the following technique.

  1. The digital tachograph and the drive recorder are connected in a communicable state, and a recording medium is mounted only on the digital tachograph side. When an event such as an accident occurs on the drive recorder side, event occurrence information and image data are transmitted from the drive recorder to the digital tachograph. When receiving the event occurrence information, the digital tachograph records the time and the event information number, and further records the received image data together with the event information number on a recording medium.

  2. The digital tachograph and the drive recorder are connected in a communicable state, and a recording medium is mounted only on the drive recorder side. When an event such as an accident occurs on the drive recorder side, event occurrence information is transmitted from the drive recorder to the digital tachograph, and the drive recorder records the event occurrence information and the image information event number. If there is operation data that can be transmitted when the event occurrence information is received, the digital tachograph transmits the operation data to the drive recorder through data communication. The drive recorder records the received operation data and image information event number.

JP 2010-55272 A

  If the technique of Patent Document 1 is adopted, digital tachograph data and drive recorder data can be recorded in a synchronized state, so that the recording medium can be unified. In other words, a removable recording medium such as a memory card need only be attached to either the digital tachograph or the drive recorder, and each crew member can manage a plurality of recording media, that is, digital tachographs, in order to manage information for each crew member. Therefore, it is not necessary to have a recording medium for recording and a recording medium for drive recorder.

  However, if the image data acquired by the drive recorder and the operation data acquired by the digital tachograph are to be recorded in synchronization on the recording medium mounted on the drive recorder side, data is partially lost. Or discontinuities may occur.

  That is, since the drive recorder handles image data with a large amount of information, the load on the processing of the control computer becomes very large especially when an abnormality (event) such as a traffic accident occurs, and there is almost no margin. That is, since it is necessary to continuously execute the compression processing and recording processing of the acquired image data at high speed, there occurs a period during which other processing cannot be executed. Therefore, when an event occurs, the drive recorder computer is designed to preferentially process image data.

  Therefore, for example, if the operation data acquired by the digital tachograph is periodically transmitted to the drive recorder side and the operation data is also recorded on the recording medium mounted on the drive recorder side, The computer of the recorder omits the reception and recording of operation data, which is a low priority process. As a result, for the operation data recorded on the recording medium, the corresponding operation data is lost only during the time zone when the event occurred.

  For example, it is conceivable that a recording medium is attached to both the digital tachograph and the drive recorder, and a backup of the acquired operation data is created on the recording medium on the digital tachograph side. In this case, even if operation data is partially missing on the drive recorder recording medium, the missing operation data is stored on the backup recording medium, so the operation data recorded on the two recording media By accompanying, it is possible to supplement the operation data of the missing part.

  However, since the time managed by the digital tachograph is not synchronized with the time managed by the drive recorder, which part of the data is missing on the recording medium on the drive recorder side, and It is not easy to grasp where the corresponding data exists on the recording medium on the digital tachograph side.

  For example, it is conceivable that operation data is transmitted from the digital tachograph to the drive recorder at an appropriate timing while avoiding a time zone in which an event occurs on the drive recorder side. However, since the length of the time zone in which the drive recorder computer cannot process the operation data is relatively long (for example, 20 seconds), the data capacity of the operation data transmitted at one time increases, and the communication time becomes longer. In addition, for example, in a situation where events occur repeatedly a plurality of times in a short cycle, data loss is unavoidable.

  The present invention has been made in view of the above-described circumstances, and the purpose thereof is to facilitate the understanding of the missing portion in the recorded operation data and the location of the data corresponding to the missing portion. Another object is to provide a vehicle information recording system and a vehicle information recording method.

In order to achieve the above-described object, the vehicle information recording system according to the present invention is characterized by the following (1) to (6).
(1) A drive recorder that records data of an image that is mounted on a vehicle and is captured by at least a camera on the vehicle, and a digital tachograph that is mounted on the vehicle and records at least vehicle speed data relating to the operation status of the vehicle. An information recording system for a vehicle comprising:
A data communication unit enabling data communication between the drive recorder and the digital tachograph;
A first data writing unit for recording image data arranged on the drive recorder and operation data received from the digital tachograph on a first recording medium;
An operation data transmission unit that is arranged on the digital tachograph and that periodically generates operation data transmitted to the drive recorder; a second data writing unit that records the operation data on a second recording medium;
An event data generating unit that is arranged on the drive recorder and detects occurrence of a predetermined abnormal state related to the vehicle as an event occurrence and generates event data for each occurrence of the event;
When there is unprocessed event data arranged on the drive recorder and when operation data is generated on the digital tachograph side, a first identification code different for each event is added to the corresponding event data. 1 identification code adding unit;
When there is unprocessed event data on the drive recorder side when there is unprocessed operation data arranged on the digital tachograph, a second identification corresponding to the first identification code And a second identification code adding unit for adding a code to the corresponding operation data.
(2) The vehicle information recording system according to (1) above,
The first identification code adding unit and the second identification code adding unit assign a common code as the first identification code and the second identification code.
(3) The vehicle information recording system according to (1) above,
The event data generating unit generates event data of a communication error when the occurrence of a communication error is detected during communication between the digital tachograph and the drive recorder, and the first identification code adding unit and the second identification code are generated. The code adding unit assigns a communication error code as the first identification code and the second identification code.
(4) The vehicle information recording system according to (1) above,
The drive recorder searches for missing data to which the first identification code is added from event data recorded on the first recording medium when a predetermined condition is satisfied, and finds missing data. In this case, the specific operation data corresponding to the first identification code is obtained from the digital tachograph using the first identification code, and the missing data complement that automatically supplements the content of the missing data Further comprising a processing unit.
(5) The vehicle information recording system according to (4) above,
The digital tachograph searches for inconsistent data to which the second identification code is added from operation data recorded on the second recording medium, and when the inconsistent data is found And an inconsistent data transmission processing unit for transmitting the inconsistent data together with the second identification code to the drive recorder.
(6) The vehicle information recording system according to (4) above,
The missing data complement processing unit starts processing after recognizing that at least one of the stop state and the ignition off state of the vehicle is satisfied.

According to the vehicle information recording system configured as described in (1) above, when there is a lack of operation data in the data recorded on the first recording medium due to the occurrence of an event, the lack has occurred. Can be recognized by the presence of the first identification code. Further, since all the operation data including the specific operation data missing on the first recording medium is recorded on the second recording medium, the operation data missing from the second recording medium. Can be obtained. Furthermore, since the first identification code and the second identification code are in a correspondence relationship, the data corresponding to the specific operation data missing on the first recording medium is converted into the second identification code. And can be specified on the second recording medium.
Further, according to the vehicle information recording system having the configuration (2), the first identification code and the second identification code are common codes, and therefore the identification missing on the first recording medium. The location of the operation data can be easily specified on the second recording medium.
In addition, according to the vehicle information recording system having the configuration (3), the presence or absence of missing data can be identified even when missing data occurs due to the occurrence of a communication error. Further, the location of the missing data can be specified on the second recording medium.
Further, according to the vehicle information recording system configured as described in (4) above, even when data is missing on the first recording medium, the missing data is controlled by the control of the missing data supplement processing unit. Is automatically supplemented, so that the recording medium used by each crew member can be unified only to the first recording medium, and the second recording medium need not be carried around.
According to the vehicle information recording system configured as described in (5) above, operation data that does not exist on the first recording medium is transmitted from the digital tachograph to the drive recorder, and the first recording medium Can be recorded.
Further, according to the vehicle information recording system having the configuration (6), since the processing is started only in a state where there is no possibility of a new event occurring, a large amount of data is transferred or a relatively complicated processing is performed. The problem is less likely to occur even if

In order to achieve the above-described object, a vehicle information recording method according to the present invention is characterized by the following (7) to (8).
(7) A drive recorder that records data of an image that is mounted on a vehicle and is captured by at least a camera on the vehicle, and a digital tachograph that is mounted on the vehicle and records at least vehicle speed data relating to the operation status of the vehicle. A vehicle information recording method for controlling a vehicle information recording system comprising:
Connect the drive recorder and the digital tachograph in a state where data communication is possible,
Write the image data generated by the drive recorder and the operation data transmitted from the digital tachograph on the first recording medium equipped in the drive recorder,
The operation data periodically generated on the digital tachograph side is written on the second recording medium equipped in the digital tachograph and transmitted to the drive recorder,
When the drive recorder detects the occurrence of a predetermined abnormal state related to the vehicle as an event occurrence, it generates event data for each occurrence of the event,
If there is unprocessed event data when operation data is generated on the digital tachograph side, a different first identification code is added to the corresponding event data for each event,
When unprocessed operation data is present on the digital tachograph, if the unprocessed event data is present on the drive recorder side, the second identification code corresponding to the first identification code is determined. To be added to the operation data.
(8) The vehicle information recording method according to (7) above,
When missing data to which the first identification code is added is searched from event data recorded on the first recording medium when a predetermined condition is satisfied, and missing data is found, Specific operation data corresponding to the first identification code is acquired from the digital tachograph using the first identification code, and the contents of the missing data are automatically complemented.

According to the vehicular information recording method having the configuration (7) above, a lack occurs when operation data is missing in the data recorded on the first recording medium due to the occurrence of an event. Can be recognized by the presence of the first identification code. Further, since all the operation data including the specific operation data missing on the first recording medium is recorded on the second recording medium, the operation data missing from the second recording medium. Can be obtained. Furthermore, since the first identification code and the second identification code are in a correspondence relationship, the data corresponding to the specific operation data missing on the first recording medium is converted into the second identification code. And can be specified on the second recording medium.
Further, according to the vehicle information recording method having the configuration of (8), even if data is missing on the first recording medium, the missing data is controlled by the missing data complementing processing unit. Is automatically supplemented, so that the recording medium used by each crew member can be unified only to the first recording medium, and the second recording medium need not be carried around.

  According to the vehicle information recording system and the vehicle information recording method of the present invention, it becomes easy to grasp a missing portion in the recorded operation data. Furthermore, it becomes easy to grasp the location of data corresponding to the missing portion.

  The present invention has been briefly described above. Further, details of the present invention will be further clarified by reading through the modes for carrying out the invention described below with reference to the accompanying drawings.

It is a block diagram which shows the hardware structural example of the information recording system for vehicles of embodiment. It is a block diagram which shows the functional structure regarding the principal part of the information recording system for vehicles shown in FIG. It is a sequence diagram showing main operation | movement of the information recording system for vehicles shown in FIG. It is a schematic diagram which shows the specific example of an event data table and an operation data table. It is a time chart showing the example of the data recorded on each recording medium. It is a block diagram which shows the modification of the information recording system for vehicles shown in FIG. It is a sequence diagram showing main operation | movement of the vehicle information recording system shown in FIG. It is a time chart showing the example of the data recorded on each recording medium in the vehicle information recording system shown in FIG.

  Specific embodiments relating to the vehicle information recording system and the vehicle information recording method of the present invention will be described below with reference to the drawings.

  An example of the hardware configuration of the vehicle information recording system of this embodiment is shown in FIG. As shown in FIG. 1, the vehicle information recording system includes a drive recorder 100 and a digital tachograph 200 that are connected in a communicable state.

  When the drive recorder 100 detects an abnormal state in which a traffic accident has occurred in a vehicle equipped with the vehicle-mounted device, the drive recorder 100 captures the situation of the time zone with the vehicle-mounted camera and records the obtained image data in a predetermined recording manner. It is a device for automatically recording and storing on a medium. The digital tachograph 200 is a device for periodically collecting information such as a vehicle speed and an engine speed representing an operation status of a vehicle equipped with the vehicle-mounted device, and automatically recording and storing the information as operation data on a predetermined recording medium. It is.

  As shown in FIG. 1, the drive recorder 100 includes a microcomputer (CPU) 11, interfaces (I / F) 15, 16, 17, a CF card 18, a read / write memory (SDRAM) 19, and a communication interface 20. The in-vehicle camera 12 is connected to the input of the interface 15, the acceleration (G) sensor 13 is connected to the input of the interface 16, and the vehicle speed (speed) sensor 14 is connected to the input of the interface 17.

  The in-vehicle camera 12 is fixed on the vehicle and is arranged so as to be able to shoot a video that can be used for grasping a situation such as a traffic accident. For example, by directing the shooting direction of the in-vehicle camera 12 to the traveling direction of the vehicle, it is possible to take a picture of a preceding vehicle, an oncoming vehicle, a pedestrian, or the like traveling in front of the host vehicle.

  The acceleration sensor 13 outputs an electrical signal indicating the magnitude of acceleration in the front-rear direction and the lateral direction applied to the vehicle. The electrical signal output from the acceleration sensor 13 is used to identify the presence or absence of an abnormally large acceleration that occurs when an abnormality such as a traffic accident occurs.

  The vehicle speed sensor 14 detects the rotation state of the output shaft of the vehicle transmission, and outputs one pulse signal (vehicle speed pulse) each time the wheel rotates by a predetermined amount. Therefore, for example, the current vehicle speed can be grasped by counting the number of vehicle speed pulses generated within a predetermined time.

  The microcomputer 11 executes various programs relating to the operation of the drive recorder 100 by executing a program prepared in advance on the internal memory. The contents of the control will be described later.

  The CF card 18 is a memory card that can be attached to and detached from the drive recorder 100, and is equipped with a nonvolatile semiconductor memory. The CF card 18 is used as a recording medium for recording and storing image data generated when a traffic accident occurs. In the case of a system in which the drive recorder 100 and the digital tachograph 200 are connected as in the present embodiment, operation data generated on the digital tachograph 200 side can also be recorded on the CF card 18.

  A read / write memory (SDRAM) 19 is a semiconductor memory capable of reading and writing data, and is used for temporary data recording. The communication interface 20 enables data communication between the drive recorder 100 and the digital tachograph 200. The drive recorder 100 and the digital tachograph 200 are connected via a predetermined communication cable 300.

  The basic operation when the drive recorder 100 operates alone is the same as that of a general drive recorder. That is, the magnitude of the acceleration output from the acceleration sensor 13 is constantly monitored, and if an acceleration greater than a predetermined value is detected, it is considered that an event such as a traffic accident has occurred. When an event occurs, image data obtained by photographing with the in-vehicle camera 12 is recorded on the CF card 18 as a recording medium for a predetermined time (for example, 10 seconds).

  In addition, since an image obtained at a timing before the event occurs is also important, the image is recorded on the CF card 18 for a predetermined time (for example, 10 seconds) before the event occurs. In order to enable this operation, for images taken within the past predetermined time, data is always recorded in the temporary storage area on the read / write memory 19 or the CF card 18, and data that has become obsolete after the predetermined time has elapsed. Controls overwriting with new data. Therefore, when an event occurs, the image data of the past predetermined time taken before that event can be taken out from the temporary storage area and stored. A characteristic operation in the drive recorder 100 will be described later.

  As shown in FIG. 1, a digital tachograph 200 includes a microcomputer (CPU) 31, a nonvolatile memory 32, a volatile memory 33, a CF card interface (I / F) 34, a CF card 35, a shutter switch 36, an audio interface 37, Clock circuit (RTC: real time clock) 38, read only memory (EEPROM) 39, switch input unit 40, display (LCD) controller 41, communication interface 42, speed / engine rotation interface 51, speed / engine rotation alarm unit 52, External input interface 53, analog input interface 54, external output interface 55, ETC interface 56, printer interface 57, GPS interface 58, CAN interface 59, communication terminal interface 60, and a power supply unit 61.

  The microcomputer (CPU) 31 performs a process necessary for controlling the digital tachograph 200 by executing a program held on the read-only memory 39. As contents of main control, the microcomputer 31 collects various information indicating the operation state during the business operation of the vehicle, and records and stores the obtained digital data as operation data. Other characteristic control will be described later in detail.

  The nonvolatile memory 32 is a storage device that can hold stored information even when the power supply supplied from the power supply unit 61 is cut off, and can write and read information. The nonvolatile memory 32 is used to hold data such as a predetermined constant.

  The volatile memory 33 is a semiconductor memory capable of writing and reading information, and is accessed by the microcomputer 31 for writing and reading data temporarily used when power is supplied from the power supply unit 61. Is done.

  The CF card interface 34 has a card slot into which a CF card 35 as a recording medium can be mounted, and functions as an interface for the microcomputer 31 to access the mounted CF card 35. The CF card 35 is detachably attached to the card slot and has a non-volatile semiconductor memory.

  The audio interface 37 is an interface for inputting and outputting audio. That is, sound such as voice uttered by a crew member can be input as an electrical signal and converted into digital data to be collected as voice information, or a voice signal such as an announcement can be synthesized and output as sound.

  The clock circuit 38 constantly counts predetermined clock pulses, and can grasp the current date and time and output the information.

  The switch input unit 40 has a plurality of switches that can be operated by the crew. When the crew member operates the button of each switch, a signal indicating the state of the corresponding switch is input from the switch input unit 40 to the microcomputer 31.

  Although not shown, the digital tachograph 200 is equipped with a liquid crystal display having a display screen arranged on the front panel of the casing. The display controller 41 is a circuit that controls display on the liquid crystal display. The microcomputer 31 can control the display content of the liquid crystal display via the display controller 41.

  The communication interface 42 is an interface used for data communication between the digital tachograph 200 and the drive recorder 100.

  The speed / engine rotation interface 51 is an interface for inputting various electric signals for grasping the vehicle speed and the engine speed to the microcomputer 31. For example, an output of a vehicle speed sensor that generates a pulse signal according to the rotation amount (rotation speed) of a vehicle wheel or an output of an engine rotation sensor that outputs a signal according to the rotation amount of an engine drive unit is a speed / engine rotation interface. Connected to 51 inputs.

  The speed / engine rotation warning unit 52 is used to output an alarm sound when the detected vehicle speed or engine speed (rpm) becomes abnormal.

  The external input interface 53 is used to connect an external device prepared as an option, for example, an input device such as a switch unit. The analog input interface 54 is used for inputting an analog electric signal. The analog input interface 54 incorporates an analog / digital converter. The external output interface 55 is used to connect an external device prepared as an option.

  The ETC interface 56 is used to connect an ETC (Electronic Toll Collection System) vehicle-mounted device prepared as an option. The printer interface 57 is used for connecting an optional printer. The GPS interface 58 is used for connecting a GPS receiver. The GPS receiver can receive radio waves from a GPS (Global Positioning System) satellite and output position information indicating the current position of the vehicle.

  The CAN interface 59 is an interface for performing data communication with other devices mounted on the vehicle according to the CAN communication standard. The communication terminal interface 60 is an interface for connecting a predetermined communication terminal and the digital tachograph 200.

  The power supply unit 61 is a power supply circuit for converting the voltage of the power supply circuit (battery output) of the vehicle into a predetermined voltage that can be used as a power supply by the microcomputer 31.

  The basic operation when the digital tachograph 200 operates alone is the same as that of a general digital tachograph. That is, an electric signal input from the speed / engine rotation interface 51 to the microcomputer 31 is monitored to grasp the current vehicle speed and the engine speed, and operation data including these information is time-series data at a constant cycle. It records on the CF card 35 which is a recording medium.

  When the drive recorder 100 and the digital tachograph 200 are connected and used as in the vehicle information recording system shown in FIG. 1, in addition to the above-described operations, the drive recorder 100 and the digital tachograph 200 are respectively special. Perform the correct operation. The main functional configuration provided to realize this special operation is shown in FIG. An outline of characteristic operations of the drive recorder 100 and the digital tachograph 200 is shown in FIG.

  Referring to FIG. 2, the drive recorder 100 includes an event data generation unit 101, a first identification code adding unit 102, a first data writing unit 103, a data communication unit 104, and a first recording medium 105. The operations of the event data generating unit 101, the first identification code adding unit 102, the first data writing unit 103, and the data communication unit 104 are realized by the processing of the microcomputer 11 shown in FIG. The first recording medium 105 corresponds to the CF card 18.

  On the other hand, on the digital tachograph 200, an operation data generation unit 201, an operation data transmission unit 202, a second data writing unit 203, a second identification code adding unit 204, a data communication unit 205, and a second recording medium 207 are provided. Yes. The operations of the operation data generating unit 201, the operation data transmitting unit 202, the second data writing unit 203, the second identification code adding unit 204, and the data communication unit 205 are realized by the processing of the microcomputer 31 shown in FIG. . The second recording medium 207 corresponds to the CF card 35.

  First, the operation on the drive recorder 100 side will be described. As shown in FIG. 2, an event data table 111, a video data file 112 and an operation data file 113 are recorded on the first recording medium 105.

  The video data file 112 is a file that holds a set of video still image data obtained by photographing by the in-vehicle camera 12 or a compressed moving image data for a predetermined time. Every time an event, that is, an abnormal state such as a traffic accident occurs, video data obtained by photographing the situation in that time zone is recorded as one or a plurality of video data files 112.

  The operation data file 113 is a file that holds the same content as the operation data generated on the digital tachograph 200 side. The drive recorder 100 records the operation data received from the digital tachograph 200 on the first recording medium 105 as the operation data file 113.

  The event data table 111 is an area for sequentially recording event data generated every time an event occurs. A specific example of the configuration of the event data table 111 is shown in FIG. As shown in FIG. 4, a plurality of event data ED1, ED2, ED3,... Can be written on the event data table 111. Items for writing “address” 111a, “time” (date and time) 111b, “video data” 111c, “operation data on drive recorder” 111d, “code” 111e, etc. in the area for recording each event data Is provided. The content of “time” 111b in each event data represents the time when the event or the like occurred. The “video data” 111c is information indicating the location and file name of the specific video data file 112 in which the video data of the corresponding event is recorded. The “operation data on the drive recorder” 111d is information indicating the location and file name of the operation data file 113 in which operation data acquired at the same time as the corresponding event is recorded. The “code” 111e will be described later.

  The event data generation unit 101 generates event data when an event occurs, that is, when occurrence of an abnormally large acceleration is detected, and writes the event data in the event data table 111. In this example, even when a communication error occurs in the data communication unit 104, the event data generation unit 101 writes the event data in the event data table 111.

  When an event occurs, the first data writing unit 103 compresses the video data (also referred to as image data) obtained by photographing with the in-vehicle camera 12 to generate a video data file 112, and this file is stored in the first recording medium. 105 is written on. When the data communication unit 104 receives operation data transmitted from the digital tachograph 200, the first data writing unit 103 writes the operation data as the operation data file 113 on the first recording medium 105.

  When the digital tachograph 200 intends to transmit operation data to the drive recorder 100 when the digital tachograph 200 is trying to transmit operation data, if the unprocessed event data exists on the event data table 111, the first identification code adding unit 102 An identification code is generated and written in the item “code” 111e of the corresponding event data. When the occurrence of a communication error is detected, the first identification code adding unit 102 writes a code indicating a communication error in the item “code” 111e of the corresponding event data.

  The data communication unit 104 performs data communication processing between the drive recorder 100 and the digital tachograph 200 using the communication interface 20.

  Next, the operation on the digital tachograph 200 side will be described. As shown in FIG. 2, an operation data table 211 and an operation data file 212 are recorded on the second recording medium 207.

  The operation data file 212 is held together as a set for each time at which operation data (information on vehicle speed and engine speed) collected on the digital tachograph 200 at regular intervals (for example, every 10 seconds) is collected. It is a file. The operation data table 211 holds information for managing the contents of the operation data file 212 recorded on the second recording medium 207.

  A specific example of the configuration of the operation data file 212 is shown in FIG. As shown in FIG. 4, many operation data management information UD1, UD2, UD3,... Can be recorded in order on the operation data table 211. In the area where each operation data management information is recorded, items for writing “address” 211a, “time” 211b, “operation data on tachograph” 211c, “code” 211d, and the like are provided. “Time” 211b in each operation data management information represents the acquisition date and time of the corresponding operation data. Further, the “operation data on the tachograph” 211c represents the location and file name related to a specific operation data file 212 including the corresponding operation data. The “code” 211d will be described later.

  The operation data generation unit 201 repeatedly collects information such as the vehicle speed and the engine speed at a constant period, and generates operation data collectively for each collected time. The generated operation data is input to the operation data transmission unit 202 and the second data writing unit 203, respectively.

  The operation data transmission unit 202 transmits the operation data generated by the operation data generation unit 201 to the drive recorder 100 via the data communication unit 205. The data communication unit 205 performs data communication between the drive recorder 100 and the digital tachograph 200 using the communication interface 42.

  The second data writing unit 203 writes the operation data input from the operation data generation unit 201 to the second recording medium 207 as the operation data file 212 and generates operation data management information for managing the corresponding operation data. This is written in the operation data table 211.

  When the second identification code adding unit 204 detects that unprocessed event data exists on the drive recorder 100 before the operation data transmitting unit 202 transmits one operation data to the drive recorder 100, the second identification code adding unit 204 A code is generated and written in the item “Code” 211d of the corresponding operation data management information. In the present embodiment, the second identification code generated by the second identification code adding unit 204 is the same as the first identification code generated by the first identification code adding unit 102 on the drive recorder 100 side. Note that the relationship between the first identification code and the second identification code is not necessarily the same as long as they are associated with each other so that the other can be identified from the contents of one. Further, when a communication error occurs in the data communication unit 205, the second identification code adding unit 204 generates a second identification code indicating the occurrence of the communication error, and this is the “code” of the corresponding operation data management information. Write to the item 211d.

  Characteristic operations of the drive recorder 100 and the digital tachograph 200 will be described with reference to FIGS.

  When new operation data is generated by the operation data generation unit 201 on the digital tachograph 200 side, the operation data is written on the second recording medium 207 by the second data writing unit 203. In addition, the operation data transmission unit 202 needs to transmit the generated operation data to the drive recorder 100. However, before transmitting the main body of the operation data, the operation data transmission unit 202 provides “operation data generation” in step S22 as a notice. Information "is transmitted to the drive recorder 100.

  On the drive recorder 100 side, when the “operation data generation information” is received in step S11, whether or not unprocessed event data exists on the event data table 111 in the next step S12 is determined. Identifies. If there is no unprocessed event data, the process proceeds to step S13, and if present, the process proceeds to step S14.

  In step S13, the first data writing unit 103 writes data relating to the video data file 112 and the operation data file 113 on the first recording medium 105 as necessary. However, when an event occurs, that is, when there is unprocessed event data, the processing load for generating the video data file 112 is very large. And the creation of the operation data file 113 may be omitted.

  In step S <b> 14, the first identification code adding unit 102 writes the first identification code in the item “code” 111 e of unprocessed event data at the end of the event data table 111. This first identification code indicates that there is a high possibility of missing “operation data” on the first recording medium 105, and a different value is assigned to each event data for the first identification code. For example, on the event data table 111 shown in FIG. 4, “00” and “F1” are written as the first identification codes in the event data ED1 and ED4, respectively.

  When a communication error occurs, a value that indicates that a communication error has occurred is assigned to the first identification code. Further, the value of the first identification code generated by the first identification code adding unit 102 in step S14 is notified to the digital tachograph 200 via the data communication unit 104.

  The digital tachograph 200 transmits “operation data generation information” in step S22, and then receives a notification from the drive recorder 100 in the data communication unit 205 in step S23, and whether there is unprocessed event data on the drive recorder 100 side. Identify whether or not. If unprocessed event data exists, the process proceeds to step S26, and if not, the process proceeds to step S24.

  In step S24, the last “operation data” detected in step S21 is transmitted from the operation data transmission unit 202 to the drive recorder 100 via the data communication unit 205. In step S <b> 25, the second data writing unit 203 writes the same “operation data” as the operation data file 212 on the second recording medium 207. In addition, operation data management information for managing the written operation data file 212 is written in the operation data table 211.

  In step S <b> 26, as in step S <b> 25, the second data writing unit 203 writes the operation data as the operation data file 212 and writes operation data management information for managing the operation data in the operation data table 211. Further, the second identification code adding unit 204 generates a second identification code and writes it in the item “code” 211d of the corresponding operation data management information. In the present embodiment, the second identification code generated by the second identification code adding unit 204 is common to the value of the first identification code notified from the drive recorder 100.

  Therefore, for example, when an event occurs on the drive recorder 100 side at a certain point in time, event data ED4 on the event data table 111 shown in FIG. 4 is generated, and when this is unprocessed, the item of “code” 111e of the event data ED4 “F1” which is the first identification code is written. On the other hand, when “operation data” is generated on the digital tachograph 200 side in the same time zone and the n-th operation data management information UDn is written on the operation data table 211 shown in FIG. 4, this operation data management information UDn. In the item “code” 211d, “F1” as the second identification code, that is, a value corresponding to the first identification code used by the drive recorder 100 is written.

  FIG. 5 shows an example of time-series changes of data recorded on the first recording medium 105 on the drive recorder 100 side and data recorded on the second recording medium 207 on the digital tachograph 200 side.

  As shown in FIG. 5, when the event indicating the occurrence of an accident or the like does not occur normally on the drive recorder 100 side, the operation data generated on the digital tachograph 200 side is the second data on the digital tachograph 200. It is recorded on the recording medium 207, and the same operation data is also recorded on the first recording medium 105 on the drive recorder 100.

  However, in the example shown in FIG. 5, since an event has occurred on the drive recorder 100 side at time t1, the drive recorder 100 preferentially processes video data for a while from time t1. As a result, partial missing occurs in the operation data recorded on the first recording medium 105. However, the first identification code is written in the event data corresponding to the missing part as described above. On the digital tachograph 200 side, the second identification code is written in the operation data management information of the corresponding operation data as described above. Even if an event has not occurred, if a communication error has occurred, the first identification code is written on the first recording medium 105 in the same manner as in the event occurrence, and the second recording medium 207 The second identification code is written in

  In the situation shown in FIG. 5, a part of the operation data is missing on the first recording medium 105 and is incomplete, but all the operation data is recorded on the second recording medium 207. Therefore, a part of the operation data missing on the first recording medium 105 can be taken out from the second recording medium 207 and complemented.

  When the above-described data complementing process is performed, the first recording medium 105 and the second recording medium 207 are usually removed from the drive recorder 100 and the digital tachograph 200 on the vehicle, and are installed in an office. It is assumed that the recording data of the first recording medium 105 and the recording data of the second recording medium 207 are respectively read and analyzed using the computer.

  In this case, by searching the event data table 111 in the data on the first recording medium 105 and checking whether or not the first identification code exists in the item of “code” 111e, it is missing. It is possible to automatically detect the presence and location of data that is present. Further, the operation data missing on the first recording medium 105 can be automatically found by searching on the second recording medium 207. That is, it is only necessary to search the operation data table 211 on the second recording medium 207 and find data in which the second identification code is added to the item “code” 211d from among a large number of operation data management information. Then, the operation data to which the second identification code that matches the first identification code of the missing data is added is extracted as the target operation data and used instead of the missing data.

  In the above-described method, it is necessary to use two recording media, the first recording medium 105 and the second recording medium 207, and a computer for data analysis is necessary when performing the data supplement processing. Become. However, such a data complementing process can be automatically performed only by using the system shown in FIG. 1 without removing the first recording medium 105 and the second recording medium 207. A modified sequence for realizing this will be described below.

  FIG. 6 shows a configuration of a modification of the vehicle information recording system shown in FIG. FIG. 7 shows main operations of the vehicle information recording system shown in FIG. Further, an example of data recorded on each recording medium in the vehicle information recording system shown in FIG. 6 is shown in FIG.

  In the vehicle information recording system shown in FIG. 6, a missing data supplement processing unit 121 is added to the drive recorder 100, and an inconsistent data transmission processing unit 221 is added to the digital tachograph 200. The other configuration is the same as that of the vehicle information recording system shown in FIG. The added missing data supplement processing unit 121 and inconsistent data transmission processing unit 221 will be described below.

  The missing data complement processing unit 121 performs control related to operations such as steps S31 to S35 shown in FIG. The inconsistent data transmission processing unit 221 performs control related to operations such as steps S41 to S44 shown in FIG. The function of the missing data supplement processing unit 121 is realized by the microcomputer 11 executing a predetermined program, and the function of the inconsistent data transmission processing unit 221 is realized by the microcomputer 31 executing the predetermined program. .

  When the missing data complement processing unit 121 detects one or both of the state in which the vehicle stop is detected based on the current vehicle speed and the state in which the ignition switch is turned off, step S31 in FIG. 7 is executed. Then, external data is accepted.

  That is, in the vehicle stop state or the vehicle ignition off state (engine stop state), the drive recorder 100 does not need to collect new video data, and the digital tachograph 200 does not need to collect new operation data. The processing of the microcomputer 11 that controls the recorder 100 and the microcomputer 31 that controls the digital tachograph 200 is in an idling state with a very small load. Therefore, if this timing is used, the missing data complementing process can be performed without affecting the normal operation of the drive recorder 100 and the operation of the digital tachograph 200.

  In step S31, the missing data supplement processing unit 121 notifies the digital tachograph 200 via the data communication unit 104 that the drive recorder 100 is in the “external data reception state”. When the inconsistent data transmission processing unit 221 of the digital tachograph 200 is notified from the drive recorder 100 that it is in the “external data acceptance state”, it accepts this in step S41 and executes the processing from step S42.

  In step S <b> 32, the missing data supplement processing unit 121 identifies the presence or absence of missing data on the first recording medium 105. That is, as described above, event data is searched on the event data table 111, and the presence / absence of event data having the first identification code in the item “code” 111e is checked. If there is missing data, the process proceeds to step S33, and if there is no missing data, it is notified to the digital tachograph 200.

  The inconsistent data transmission processing unit 221 identifies whether or not there is data in which the second identification code is added to the item of “code” 211d in the operation data management information on the operation data table 211. . If operation data to which the second identification code is added is found, the process proceeds to step S43.

  In step S <b> 33, the missing data supplement processing unit 121 performs a process for matching the operation data missing on the first recording medium 105 with the operation data on the second recording medium 207. That is, the missing data supplement processing unit 121 transmits the first identification code added to the specific event data corresponding to the missing operation data to the digital tachograph 200 to request transmission of the corresponding operation data.

  In step S43, the inconsistent data transmission processing unit 221 operates on the first recording medium 105 for the special operation data found on the second recording medium 207, that is, the operation data to which the second identification code is added. Perform processing to align with the data. That is, the inconsistent data transmission processing unit 221 extracts specific operation data to which a second identification code corresponding thereto is added from the first identification code related to the operation data requested to be transmitted from the drive recorder 100. Then, the extracted operation data is transmitted to the drive recorder 100 in the next step S44. If there are a plurality of missing operation data, the processes in steps S43 and S44 are repeated.

  The missing data complement processing unit 121 receives the operation data requested in step S33 from the digital tachograph 200 in step S34. Then, the received operation data is written on the first recording medium 105 in chronological order. That is, since the position of the missing operation data can be specified by the value of the first identification code on the event data table 111, the received operation data is written in the corresponding position.

  FIG. 8 shows examples of data recorded on the first recording medium 105 on the drive recorder 100 side and data recorded on the second recording medium 207 on the digital tachograph 200 side. As in the case of the data shown in FIG. 5, in the data shown in FIG. 8, the operation data on the first recording medium 105 is missing when event data occurs or when a communication error occurs.

  However, the above-mentioned first identification code is added to the event data at the location of the operation data missing on the first recording medium 105. Further, the corresponding operation data is managed on the second recording medium 207 with the second identification code added.

  Therefore, the missing data supplement processing unit 121 shown in FIG. 6 finds the location of the operation data missing on the first recording medium 105 by the first identification code, and the inconsistent data transmission processing unit 221 performs the second operation. The location of specific operation data that can be used to supplement missing data on the recording medium 207 can be found by the second identification code.

  Then, the operation data missing on the first recording medium 105 is transferred from the digital tachograph 200 to the drive recorder 100 by executing the processes of steps S33, S34, S35, S43, and S44 shown in FIG. The operation data on the first recording medium 105 can be automatically supplemented.

  Therefore, for example, the second recording medium 207 need not be a removable recording medium such as a memory card. That is, it is possible to unify the recording medium only to the first recording medium 105, and it is possible to manage the operation data and video data of each crew member with only one first recording medium 105.

  As described above, the vehicle information recording system and the vehicle information recording method of the present invention are vehicle information composed of a drive recorder that records image data and a digital tachograph that records data related to the operation status of the vehicle. It can be used in a recording system and a vehicle information recording method for controlling the recording system. By implementing the present invention, it is possible to unify recording media for managing the information of each crew member, and to prevent data loss.

DESCRIPTION OF SYMBOLS 11 Microcomputer 12 Car-mounted camera 13 Acceleration sensor 14 Vehicle speed sensor 15, 16, 17 Interface 18 CF card 19 Read / write memory 20 Communication interface 31 Microcomputer 32 Non-volatile memory 33 Volatile memory 34 CF card interface 35 CF card 36 Shutter switch 37 Audio Interface 38 Clock circuit 39 Read only memory 40 Switch input section 41 Display controller 42 Communication interface 51 Speed / engine rotation interface 52 Speed / engine rotation alarm section 53 External input interface 54 Analog input interface 55 External output interface 56 ETC interface 57 Printer interface 58 GPS interface 59 CAN interface 60 Communication terminal interface 61 Power supply unit 100 Drive recorder 101 Event data generation unit 102 First identification code adding unit 103 First data writing unit 104 Data communication unit 105 First recording medium 111 Event data table 112 Video data file 113 Operation Data file 121 Missing data supplement processing unit 200 Digital tachograph 201 Operation data generation unit 202 Operation data transmission unit 203 Second data writing unit 204 Second identification code adding unit 205 Data communication unit 207 Second recording medium 211 Operation data table 212 Operation Data file 221 Inconsistent data transmission processing part

Claims (8)

A drive recorder that records data of an image that is mounted on a vehicle and captured by at least a camera on the vehicle, and a digital tachograph that is mounted on the vehicle and records at least vehicle speed data related to the operation status of the vehicle Vehicle information recording system,
A data communication unit enabling data communication between the drive recorder and the digital tachograph;
A first data writing unit for recording image data arranged on the drive recorder and operation data received from the digital tachograph on a first recording medium;
An operation data transmission unit that is arranged on the digital tachograph and that periodically generates operation data transmitted to the drive recorder; a second data writing unit that records the operation data on a second recording medium;
An event data generating unit that is arranged on the drive recorder and detects occurrence of a predetermined abnormal state related to the vehicle as an event occurrence and generates event data for each occurrence of the event;
When there is unprocessed event data arranged on the drive recorder and when operation data is generated on the digital tachograph side, a first identification code different for each event is added to the corresponding event data. 1 identification code adding unit;
When there is unprocessed event data on the drive recorder side when there is unprocessed operation data arranged on the digital tachograph, a second identification corresponding to the first identification code A vehicle information recording system comprising: a second identification code adding unit that adds a code to corresponding operation data. The vehicle information recording system according to claim 1, wherein the first identification code adding unit and the second identification code adding unit assign a common code as the first identification code and the second identification code. . The event data generating unit generates event data of a communication error when the occurrence of a communication error is detected during communication between the digital tachograph and the drive recorder, and the first identification code adding unit and the second identification code are generated. The vehicle information recording system according to claim 1, wherein the code adding unit assigns a communication error code as the first identification code and the second identification code. The drive recorder searches for missing data to which the first identification code is added from event data recorded on the first recording medium when a predetermined condition is satisfied, and finds missing data. In this case, the specific operation data corresponding to the first identification code is obtained from the digital tachograph using the first identification code, and the missing data complement that automatically supplements the content of the missing data The vehicle information recording system according to claim 1, further comprising a processing unit. The digital tachograph searches for inconsistent data to which the second identification code is added from operation data recorded on the second recording medium, and when the inconsistent data is found The vehicle information recording system according to claim 4, further comprising a mismatch data transmission processing unit that transmits the mismatch data together with the second identification code to the drive recorder. 5. The vehicle information recording according to claim 4, wherein the missing data complementing processing unit starts processing after recognizing that at least one of a stop state and an ignition off state of the vehicle is satisfied. system. A drive recorder that records data of an image that is mounted on a vehicle and captured by at least a camera on the vehicle, and a digital tachograph that is mounted on the vehicle and records at least vehicle speed data related to the operation status of the vehicle A vehicle information recording method for controlling a vehicle information recording system, comprising:
Connect the drive recorder and the digital tachograph in a state where data communication is possible,
Write the image data generated by the drive recorder and the operation data transmitted from the digital tachograph on the first recording medium equipped in the drive recorder,
The operation data periodically generated on the digital tachograph side is written on the second recording medium equipped in the digital tachograph and transmitted to the drive recorder,
When the drive recorder detects the occurrence of a predetermined abnormal state related to the vehicle as an event occurrence, it generates event data for each occurrence of the event,
If there is unprocessed event data when operation data is generated on the digital tachograph side, a different first identification code is added to the corresponding event data for each event,
When unprocessed operation data is present on the digital tachograph, if the unprocessed event data is present on the drive recorder side, the second identification code corresponding to the first identification code is determined. The vehicle information recording method is characterized in that the information is added to the operation data. When missing data to which the first identification code is added is searched from event data recorded on the first recording medium when a predetermined condition is satisfied, and missing data is found, The specific operation data corresponding to the first identification code is acquired from the digital tachograph using the first identification code, and the contents of the missing data are automatically supplemented. The vehicle information recording method described in 1.

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