JPWO2007066613A1 - Information recording apparatus, information recording method, information recording program, and computer-readable recording medium - Google Patents

Abstract

The detection unit (102) detects a dangerous behavior of the moving object. The recording unit (101) overwrites and records a series of video data captured from the moving body in a predetermined recording area (105). The control unit (103) controls the recording unit (101), and when a dangerous behavior is detected by the detection unit (102), recording of video data for a first predetermined period from the first detection time point. The destination is set from the predetermined recording area (105) to the recording medium (106). Further, the control unit (103) controls the recording unit (101) from the second detection time point when a dangerous behavior is newly detected by the detection unit (102) during the first predetermined period. The recording destination of the video data of the second predetermined period is set in the recording medium (106) following the video data of the first predetermined period.

Description

  The present invention relates to an information recording apparatus for recording information, an information recording method, an information recording program, and a computer-readable recording medium. However, the use of the present invention is not limited to the above-described information recording apparatus, information recording method, information recording program, and computer-readable recording medium.

  2. Description of the Related Art Conventionally, a drive recorder that records the surrounding situation of a running vehicle is known in the same manner as a flight recorder mounted on an airplane. Such a drive recorder has, for example, a front camera for photographing the front of the vehicle, a rear camera for photographing the rear, and a function of writing the front and rear images in a predetermined area of the image memory in synchronization with the reference signal. Record information in which vehicle position information and time information are added to the memory information is constantly recorded in the buffer memory. When an impact greater than or equal to a predetermined value is detected by the impact detection sensor, record information for a predetermined time from the detection time is stored in the storage memory. As described above, when an incident such as a escaping incident is encountered, the recorded vehicle stored in the storage memory can be confirmed to identify the escaping vehicle (for example, see Patent Document 1 below).

JP 2004-224105 A

  However, according to the above-described prior art, when another impact is detected within a predetermined time from the time when the impact is detected, the record information is stored by the previous impact detection. Information cannot be saved. Therefore, when encountering a continuous accident due to running or hitting after a escaping accident, a problem is that the record information regarding the accident after the first impact cannot be stored. On the other hand, assuming a continuous accident, if the predetermined time is set sufficiently long, the capacity of the storage memory for storing recorded information overflows as an example.

  In order to solve the above-described problems and achieve the object, an information recording apparatus according to a first aspect of the present invention includes a detection unit that detects a dangerous behavior of a moving body, and a series of video data imaged from the moving body. When a dangerous behavior is detected by the recording unit by controlling the recording unit and overwriting recording in a predetermined recording area, the video data of the first predetermined period from the first detection time point is detected. A first control unit that sets a recording destination from the predetermined recording area to the recording medium; and if the dangerous behavior is newly detected by the detecting unit during the first predetermined period, the recording unit is controlled. And a second control means for setting the recording destination of the video data of the second predetermined period from the second detection time point to the recording medium following the video data of the first predetermined period. It is characterized by that.

  According to a second aspect of the present invention, there is provided an information recording apparatus comprising: a detecting unit that detects a dangerous behavior of a moving body; and a recording unit that overwrites and records a series of video data captured from the moving body in a predetermined recording area. When the dangerous means is detected by the detecting means by controlling the recording means, the recording destination of the video data for the first predetermined period from the first detection time point is recorded from the predetermined recording area. When a dangerous behavior is newly detected by the first control unit to be set on the medium and after the first predetermined period has elapsed, a start point of a third predetermined period before and after the third detection point Is determined before the end time of the first predetermined period, and when the determination means determines that it is before the end time of the first predetermined period, the recording means Control the first The third video data of a predetermined period from the end time points of the regular, characterized in that it comprises a third control means for setting subsequent to the recording medium to the image data of said first predetermined time period.

  According to a third aspect of the present invention, there is provided an information recording method in which a series of video data captured from a moving body is overwritten and recorded in a predetermined recording area. When a dangerous behavior is detected by the first detection step and the first detection step, the recording destination of the video data for the first predetermined period from the first detection time point is recorded from the predetermined recording area to the recording medium. When a dangerous behavior is detected by the first setting step to be set, the second detection step of detecting a dangerous behavior during the first predetermined period, and the second detection step, the second And a second setting step of setting the video data of the second predetermined period from the time of detection to the recording medium following the video data of the first predetermined period.

  According to a fourth aspect of the present invention, there is provided an information recording method for detecting a dangerous behavior of a moving body in an information recording method for overwriting and recording a series of video data captured from a moving body in a predetermined recording area. When a dangerous behavior is detected by the detection step and the first detection step, the video data recording destination for the first predetermined period from the first detection time point is recorded on the recording medium from the predetermined recording area. A first setting step for setting, a third detection step for detecting a dangerous behavior after the first predetermined period has elapsed, and a dangerous behavior newly detected by the third detection step, A determination step of determining whether a start time of the third predetermined period before and after the detection time of 3 is before the end time of the first predetermined period; and the end of the first predetermined period by the determination step When it is determined to be before the time And a third setting step of setting the video data of the third predetermined period from the end of the first predetermined period to the recording medium following the video data of the first predetermined period. It is characterized by.

  According to a fifth aspect of the present invention, an information recording program causes a computer to execute the information recording method according to the third or fourth aspect.

  According to a sixth aspect of the present invention, a computer-readable recording medium records the information recording program according to the fifth aspect.

FIG. 1 is a block diagram showing an example of a functional configuration of the information recording apparatus according to the present embodiment. FIG. 2 is a flowchart showing the contents of processing of the information recording apparatus according to the present embodiment. FIG. 3 is an explanatory diagram showing an example of recording of video data according to the present embodiment. FIG. 4 is an explanatory diagram of an example of the vicinity of the dashboard of the vehicle in which the navigation device according to the first embodiment is installed. FIG. 5 is a block diagram of an example of a hardware configuration of the navigation apparatus according to the first embodiment. FIG. 6 is a flowchart of the process performed by the navigation device according to the first embodiment. FIG. 7 is a flowchart of the process performed by the navigation device according to the second embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Information recording apparatus 101 Recording part 102 Detection part 103 Control part 104 Judgment part 105 Recording area 106 Recording medium

  Exemplary embodiments of an information recording apparatus, an information recording method, an information recording program, and a computer-readable recording medium according to the present invention are explained in detail below with reference to the accompanying drawings.

(Embodiment)
(Functional configuration of information recording device)
The functional configuration of the information recording apparatus according to this embodiment will be described with reference to FIG. FIG. 1 is a block diagram showing an example of a functional configuration of the information recording apparatus according to the present embodiment.

  In FIG. 1, the information recording apparatus 100 includes a recording unit 101, a detection unit 102, a control unit 103, a determination unit 104, a recording area 105, and a recording medium 106.

  The recording unit 101 overwrites and records a series of video data captured from the moving body in a predetermined recording area 105. The recording unit 101 records video data in a recording destination set by control of the control unit 103 described later.

  The detection unit 102 detects a dangerous behavior of the moving body. For example, the dangerous behavior of the moving body may be detected based on the output of various sensors mounted on the moving body, such as the operation and operation of the moving body. The various sensors may be, for example, vibration sensors, G sensors, contact sensors for moving bodies, and sensors that can output information related to operations such as handle operation, direction instruction signal input operation, accelerator pedal operation, and brake pedal operation.

  The detection of the dangerous behavior by the detection unit 102 is, for example, when the output value of various sensors such as a vibration sensor and a G sensor is a value that exceeds a predetermined value, or approximates to a predetermined pattern indicating abnormality, A case where it is activated may be detected as a dangerous behavior. Moreover, based on the information regarding the operation of the moving body, when the operation is dangerous, it may be determined that the operation has a dangerous behavior. More specifically, for example, if there is an operation that makes a sudden handle more than a predetermined angle, a handle operation that does not require direction indication, or an output of information such as unnecessary acceleration or deceleration, the operation of the moving object is dangerous. It is also possible to adopt a configuration that detects an operation that causes a certain behavior.

  The control unit 103 controls the recording unit 101, and when a dangerous behavior is detected by the detection unit 102, the recording destination of the video data for the first predetermined period from the first detection time point is set to a predetermined recording area. 105 to the recording medium 106. Further, when a dangerous behavior is newly detected by the detection unit 102 during the first predetermined period, the control unit 103 controls the recording unit 101 to perform the second predetermined period from the second detection time point. The recording destination of the video data is set in the recording medium 106 following the video data of the first predetermined period. An outline of recording video data will be described later with reference to FIG.

  In addition, the control unit 103 detects that a dangerous behavior is newly detected by the detection unit 102 after the first predetermined period, and the determination unit 104 described later determines the start time point of the third predetermined period before and after the third detection time point. If it is determined that the time is before the end of the first predetermined period, the recording unit 101 is controlled so that the video data of the third predetermined period from the end of the first predetermined period is changed to the first predetermined period. Subsequently to the video data of the period, the recording medium 106 is set. An outline of recording video data will be described later with reference to FIG.

  When the detection unit 102 newly detects a dangerous behavior after the first predetermined period has elapsed, the determination unit 104 determines that the start point of the third predetermined period before and after the third detection point is the first predetermined period. It is determined whether it is before the end point. More specifically, for example, the end time of the video data of the first predetermined period recorded on the recording medium 106 from the first detection time point, and the start time of the video data of the third predetermined time period at the third detection time point To determine whether the start time of the video data in the third predetermined period is earlier.

  The recording area 105 temporarily holds the video data overwritten by the recording unit 101. In other words, video data overwritten and recorded in the recording area 105 is stored in a predetermined capacity and is overwritten sequentially. The recording medium 106 holds the video data recorded by the recording unit 101 in a nonvolatile manner so that the video data is not lost even when the information recording apparatus 100 is turned off. In this embodiment, the recording area 105 for recording video data and the recording medium 106 are separately described. However, the recording area for overwriting recording video data on one recording medium, and the video It is good also as a structure provided with the recording area which records data non-volatilely. Also, a configuration may be provided that includes a recording medium for overwriting recording video data and a recording medium for recording video data in a nonvolatile manner.

(Contents of information recording device processing)
Next, the processing contents of the information recording apparatus 100 according to the present embodiment will be described with reference to FIG. FIG. 2 is a flowchart showing the contents of processing of the information recording apparatus according to the present embodiment. In the flowchart of FIG. 2, first, the information recording apparatus 100 determines whether or not an input of a series of video data captured from a moving body has been received (step S201). Here, after receiving the input of the video data and receiving it (step S201: Yes), the recording unit 101 overwrites and records the video data in the recording area 105 according to the control of the control unit 103 (step S201). S202).

  Subsequently, the detection unit 102 determines whether or not a dangerous behavior of the moving object has been detected (step S203). The behavior of the moving body may be detected based on the output of various sensors mounted on the moving body, for example, information including the operation and operation of the moving body. In step S203, when the dangerous behavior of the moving body is not detected (step S203: No), it is determined whether or not the input of the video data is completed (step S206).

  In step S203, when the dangerous behavior of the moving body is detected (step S203: Yes), the control unit 103 controls the recording unit 101 to set the recording destination of the video data (step S204). The recording destination is set, for example, from the recording area 105 for overwriting and recording video data to the recording medium 106 for recording video data in a nonvolatile manner. More specifically, in step S203, the recording destination of the video data for the first predetermined period from the first detection time point when the dangerous behavior is detected is set to the recording medium 106 from the predetermined recording area 105. Also good.

  Next, the detection unit 102 determines whether or not a dangerous behavior of the moving object has been newly detected (step S205). The determination regarding the new detection of the dangerous behavior in step S205 may be performed for a certain period. More specifically, for example, in the first predetermined period of the video data in which the recording destination is set in step S204, the danger is detected. Judge whether a new behavior has been detected.

  In step S205, when a dangerous behavior is newly detected (step S205: Yes), the process returns to step S204, and the control unit 103 controls the recording unit 101 to newly detect a dangerous behavior. The recording destination of the video data for the second predetermined period from the detection time is set in the recording medium 106 following the video data for the first predetermined period.

  In step S205, when a dangerous behavior is not newly detected (step S205: No), the information recording apparatus 100 next determines whether or not the input of a series of video data imaged from the moving body is completed. (Step S206).

  In step S206, when the input of video data does not end (step S206: No), the process returns to step S202 and the process is repeated. When the input of video data is completed (step S206: Yes), the series of processes is terminated as it is.

  In the description of this figure, the determination regarding the new detection of the dangerous behavior in step S205 is to determine whether the dangerous behavior is newly detected during the first predetermined period. It may be determined whether a dangerous behavior has been newly detected after the period has elapsed. More specifically, for example, the start point of the third predetermined period before and after the third detection time point when the dangerous behavior is newly detected by the detection unit 102 after the first predetermined period has elapsed is the first predetermined period. The determination may be made during a period before the end point of. In that case, the determination unit 104 determines whether the start time point of the third predetermined period before and after the third detection time point in step S205 is before the end point of the first predetermined period. If it is determined that it is before the end of the period, the process returns to step S204, and the control unit 103 controls the recording unit 101 to perform video data for the third predetermined period from the end of the first predetermined period. May be set in the recording medium 106 following the video data of the first predetermined period.

  Next, an outline of recording video data according to the present embodiment will be described with reference to FIG. FIG. 3 is an explanatory diagram showing an example of recording of video data according to the present embodiment. In FIG. 3, the graph 300 shows the video data (1) 301 from the start time Ts (1) 313 to the end time Te (1) 314 and the end time from the start time Ts (2) 323 with the time 340 as the horizontal axis. Video data (2) 302 up to Te (2) 324 and video data (3) 303 from start time Ts (3) 333 to end time Te (3) 334 are shown.

  The video data (1) 301 is recorded on the recording medium 106 during a pre-detection time tb (1) 311 and a post-detection time ta (1) 312 at the dangerous behavior detection time T (1) 310. Also, the video data (2) 302 is recorded on the recording medium 106 during a pre-detection time tb (2) 321 and a post-detection time ta (2) 322 at the dangerous behavior detection time T (2) 320. The Similarly, the video data (3) 303 is recorded on the recording medium 106 during the period of the pre-detection time tb (3) 331 and the post-detection time ta (3) 332 at the dangerous behavior detection time T (3) 330. Is done.

  Here, an outline of recording of video data when a dangerous behavior of a moving object is detected will be described with reference to FIG. The recording unit 101 overwrites and records the series of video data captured from the moving body in the recording area 105 in step S202. If a dangerous behavior of the moving object is detected in step S203, the recording unit 101 follows the control of the control unit 103 from the first detection time point T (1) 310 to the first predetermined period (in this figure). , The video data (1) 301 of the pre-detection time tb (1) 311 and the post-detection time ta (1) 312) is recorded in the recording medium 106 in a nonvolatile manner.

  Subsequently, when the detection unit 102 newly detects a dangerous behavior in the first predetermined period of the video data (1) 301 in step S205, the recording unit 101 performs the dangerous behavior according to the control of the control unit 103. A second predetermined period from the second detection time point T (2) 320 newly detected (in this figure, a period of time tb (2) 321 before detection and time ta (2) 322 after detection). The video data (2) 302 is recorded in a nonvolatile manner on the recording medium 106 following the video data (1) 301 for the first predetermined period. In other words, the recording unit 101 records the recording data (1) 341 including the video data at the detection time T (1) 310 and the detection time T (2) 320 of the continuous dangerous behavior on the recording medium 106.

  In addition, even after the first predetermined period of the video data (1) 301 has elapsed, a third detection time T (3) 330 when a dangerous behavior is newly detected by the detection unit 102 after waiting for a certain period of time. Is the start time Ts (3) 333 of the video data (3) 303 in the third predetermined period before and after (in this figure, the period of time tb (3) 331 before detection and the time ta (3) 332 after detection). The determination unit 104 may determine whether it is before the end time Te (1) 314 of the first predetermined period. When the determination unit 104 determines that the start time Ts (3) 333 of the video data (3) 303 is before the end time Te (1) 314 of the first predetermined period, the recording unit 101 According to the control of 103, the video data (3) 303 for the third predetermined period from the third detection time point T (3) 330 is transferred to the recording medium 106 following the video data (1) 301 for the first predetermined period. Record in a nonvolatile manner. In other words, the recording unit 101 records the recording data (2) 342 including the video data of the detection time T (1) 310 and the detection time T (3) 330 of the continuous dangerous behavior on the recording medium 106.

  As described above, according to the present embodiment, after a dangerous behavior of a moving object is detected, if a new dangerous behavior is detected within a certain time, the recording destination of the video data is continuously recorded. Set to medium. Therefore, even if there is a continuously dangerous behavior, video data can be continuously recorded without missing.

  Example 1 of the present invention will be described below. In the first embodiment, an example in which the information recording apparatus of the present invention is implemented by a navigation device mounted on a moving body such as a vehicle (including a four-wheeled vehicle and a two-wheeled vehicle) will be described.

(Peripheral device configuration of navigation device)
First, the peripheral device configuration of the navigation device according to the first embodiment will be described with reference to FIG. FIG. 4 is an explanatory diagram of an example of the vicinity of the dashboard of the vehicle in which the navigation device according to the first embodiment is installed.

  In FIG. 4, the navigation apparatus 400 is installed on the dashboard of the vehicle. The navigation device 400 includes a main body M and a display unit (display) D. The display unit D displays the current location of the vehicle, map information, the current time, and the like.

  The navigation device 400 is connected to an in-vehicle camera 411 installed on the dashboard and an in-vehicle microphone 412 installed in the sun visor. The in-vehicle camera 411 may change the direction of the lens, and may be configured to capture images inside and outside the vehicle. The in-vehicle microphone 412 is used when recording an operation by voice input of the navigation device 400 or a state in the vehicle. The in-vehicle camera 411 may be, for example, a fixed camera that is fixed to the rear surface of the rearview mirror and captures images outside the vehicle.

  Although not shown, the in-vehicle camera 411 may be attached to the rear part of the vehicle. When the vehicle-mounted camera 411 is attached to the rear part of the vehicle, it is possible to confirm the safety behind the vehicle and to record the situation at the time of a rear-end collision when a rear-end collision occurs from another vehicle. In addition, the vehicle-mounted camera 411 may be an infrared camera that records in a dark place. A plurality of in-vehicle cameras 411 and in-vehicle microphones 412 may be installed in the vehicle, or may be a movable camera instead of a fixed type.

  The navigation device 400 has a drive recorder function of recording the traveling state of the vehicle, as well as searching for a route to the destination point and recording information. The drive recorder function is a navigation device that displays video and audio obtained by the in-vehicle camera 411 and the in-vehicle microphone 412, current position information of the vehicle obtained by a GPS unit 515 and various sensors 516 described later, changes in traveling speed, and the like. Recording is performed on 400 recording media (a magnetic disk 505 and an optical disk 507 described later).

  By using such a drive recorder function to constantly record the driving conditions, when the vehicle is involved in an accident or when an accident occurs around the vehicle, the material used to investigate the facts is obtained. be able to. Information to be recorded using the drive recorder function may be accumulated as long as the recording capacity of the recording medium is not exceeded, or may be sequentially erased while leaving a record for a predetermined time. Further, the recording medium may have an overwriting recording area for always overwriting the running state and a recording area for saving the running state when involved in an accident, or a recording for overwriting recording. A plurality of media and storage recording media may be provided.

(Hardware configuration of navigation device 400)
Next, a hardware configuration of the navigation apparatus 400 according to the first embodiment will be described with reference to FIG. FIG. 5 is a block diagram of an example of a hardware configuration of the navigation apparatus according to the first embodiment.

  In FIG. 5, a navigation device 400 is mounted on a moving body such as a vehicle, and includes a CPU 501, a ROM 502, a RAM 503, a magnetic disk drive 504, a magnetic disk 505, an optical disk drive 506, an optical disk 507, and audio. I / F (interface) 508, microphone 509, speaker 510, input device 511, video I / F 512, display 513, communication I / F 514, GPS unit 515, various sensors 516, and camera 517 And. In addition, the components 501 to 517 are connected by a bus 520, respectively.

  First, the CPU 501 governs overall control of the navigation device 400. The ROM 502 stores programs such as a boot program, a route search program, a route guidance program, a voice generation program, a map information display program, a communication program, a database creation program, and a data analysis program. The RAM 503 is used as a work area for the CPU 501.

  Here, the route search program searches for the optimum route from the departure point to the destination point using map information recorded on the optical disk 507 described later. Here, the optimum route is the shortest (or fastest) route to the destination point or the route that best matches the conditions specified by the user. The guidance route searched by executing the route search program is output to the audio I / F 508 and the video I / F 512 via the CPU 501.

  The route guidance program is based on the guidance route information searched by executing the route search program, the current location information of the navigation device 400 acquired by the communication I / F 514, and the map information read from the optical disc 507. Real-time route guidance information can be generated. The route guidance information generated by executing the route guidance program is output to the audio I / F 508 and the video I / F 512 via the CPU 501.

  The sound generation program generates tone and sound information corresponding to the pattern. That is, based on the route guidance information generated by executing the route guidance program, the virtual sound source corresponding to the guidance point is set and the voice guidance information is generated, and output to the voice I / F 508 via the CPU 501.

  Also, the map information display program determines the display format of the map information displayed on the display 513 by the video I / F 512, and displays the map information on the display 513 according to the determined display format.

  Further, the CPU 501 may be configured to switch the recording destination of the traveling state of the vehicle that has been constantly recorded when a trigger is detected by various sensors 516 described later. The recording destination of the running state may have, for example, an overwriting recording area for overwriting the running state at all times, and a storage recording area for saving the running state when a trigger is detected. The recording medium and the storage recording medium may be provided. Further, there may be a plurality of overwriting recording areas and overwriting recording media. Details of the switching of the recording destination will be described later with reference to FIGS.

  The magnetic disk drive 504 controls the reading / writing of the data with respect to the magnetic disk 505 according to control of CPU501. The magnetic disk 505 records data written under the control of the magnetic disk drive 504. As the magnetic disk 505, for example, an HD (hard disk) or an FD (flexible disk) can be used.

  The optical disk drive 506 controls reading / writing of data with respect to the optical disk 507 according to the control of the CPU 501. The optical disk 507 is a detachable recording medium from which data is read according to the control of the optical disk drive 506. As the optical disc 507, a writable recording medium can be used. In addition to the optical disk 507, the removable recording medium may be an MO, a memory card, or the like.

  As an example of information recorded on the magnetic disk 505 and the optical disk 507, images and sounds inside and outside the vehicle obtained by the in-vehicle camera 411 and the in-vehicle microphone 412 shown in FIG. 4, and a vehicle detected by the GPS unit 515 described later. Current position information, output values from various sensors 516 described later, and the like. Further, the trigger information may be accumulated and stored based on the trigger detected from the outputs of the various sensors 516. These pieces of information are recorded by the drive recorder function of the navigation device 400 and used as verification materials when a traffic accident occurs.

  Other examples of information recorded on the magnetic disk 505 and the optical disk 507 include map information used for route search and route guidance. The map information includes background data that represents features (features) such as buildings, rivers, and the ground surface, and road shape data that represents the shape of the road, and is displayed in two or three dimensions on the display screen of the display 513. Drawn. When the navigation device 400 is guiding a route, the map information and the current location of the vehicle acquired by the GPS unit 515 described later are displayed in an overlapping manner.

  The road shape data further includes traffic condition data. The traffic condition data includes, for example, whether or not there is a signal or a pedestrian crossing, whether or not there is a highway doorway or junction, the length (distance) of each link, road width, direction of travel, road type (highway, Such as toll roads and general roads).

  The traffic condition data stores past traffic information obtained by statistically processing past traffic information based on seasons, days of the week, large holidays, and time. The navigation device 400 obtains information on the currently occurring traffic jam based on road traffic information received by the communication I / F 514 described later, and can predict the traffic jam status at a specified time based on the past traffic jam information. Become.

  In the first embodiment, the map information is recorded on the magnetic disk 505 and the optical disk 507. However, the present invention is not limited to this. The map information is not recorded only on information provided integrally with the hardware of the navigation apparatus 400, and may be provided outside the navigation apparatus 400. In that case, the navigation apparatus 400 acquires map information via a network through communication I / F514, for example. The acquired map information is stored in the RAM 503 or the like.

  The audio I / F 508 is connected to an audio input microphone 509 (for example, the in-vehicle microphone 412 in FIG. 4) and an audio output speaker 510. The sound received by the microphone 509 is A / D converted in the sound I / F 508. In addition, sound is output from the speaker 510. Note that the sound input from the microphone 509 can be recorded as sound data on the magnetic disk 505 or the optical disk 507.

  Further, examples of the input device 511 include a remote controller, a keyboard, a mouse, a touch panel, and the like provided with a plurality of keys for inputting characters, numerical values, various instructions, and the like.

  Video I / F 512 is connected to display 513 and camera 517 (for example, in-vehicle camera 411 in FIG. 4). Specifically, the video I / F 512 includes, for example, a graphic controller that controls the entire display 513, a buffer memory such as a VRAM (Video RAM) that temporarily records image information that can be displayed immediately, and a graphic controller. Based on the output image data, the display 513 is configured by a control IC or the like.

  The display 513 displays icons, cursors, menus, windows, or various data such as characters and images. As the display 513, for example, a CRT, a TFT liquid crystal display, a plasma display, or the like can be adopted. The display 513 is installed in a manner like the display unit D in FIG. A plurality of displays 513 may be provided in the vehicle, for example, for the driver and for a passenger seated in the rear seat.

  The camera 517 captures images inside or outside the vehicle. The image may be either a still image or a moving image. For example, a camera 517 captures the behavior of a passenger inside the vehicle, and the captured image is output to a recording medium such as a magnetic disk 505 or an optical disk 507 via the image I / F 512. To do. The camera 517 captures the situation outside the vehicle, and outputs the captured image to a recording medium such as the magnetic disk 505 or the optical disk 507 via the video I / F 512. The video output to the recording medium is overwritten and stored as a drive recorder image.

  In addition, the communication I / F 514 is connected to a network via wireless and functions as an interface between the navigation device 400 and the CPU 501. The communication I / F 514 is further connected to a communication network such as the Internet via wireless, and also functions as an interface between the communication network and the CPU 501.

  Communication networks include LANs, WANs, public line networks and mobile phone networks. Specifically, the communication I / F 514 includes, for example, an FM tuner, a VICS (Vehicle Information and Communication System) / beacon receiver, a radio navigation device, and other navigation devices. Get road traffic information such as regulations. VICS is a registered trademark.

  The GPS unit 515 uses a received wave from a GPS satellite and output values from various sensors 516 (for example, an angular velocity sensor, an acceleration sensor, a tire rotation number, etc.) to be described later, and the current position of the vehicle (navigation device 400). Information indicating the current location). The information indicating the current location is information for specifying one point on the map information such as latitude / longitude and altitude. Further, the GPS unit 515 outputs an odometer, a speed change amount, and an azimuth change amount using output values from the various sensors 516. This makes it possible to analyze dynamics such as sudden braking and sudden steering.

  Here, a method of specifying the current location using the GPS unit 515 will be described. First, in GPS, a total of 24 GPS satellites are arranged, four each in six orbital planes around the earth. These satellites are adjusted in orbit so that the same satellites are located at the same time every day, and 5-6 satellites are always visible from any point on the earth (but need to be in a clear line of sight) .

  The GPS satellites are equipped with cesium (Cs) atomic clocks (oscillators), and keep accurate time in synchronization with the time of each satellite. Furthermore, each satellite is equipped with one cesium oscillator and two rubidium (Rb) oscillators as backups. This is because accurate time is indispensable for position measurement by GPS.

  A GPS satellite transmits radio waves (hereinafter referred to as GPS signals) having two frequencies of 1575.42 MHz (L1) and 1227.60 MHz (L2). This radio wave is modulated by a random number code called a pseudo random code (Pseudo Random Noise Code). When the radio wave is received by the GPS unit 515 or the like, the signal content is decoded with reference to a code corresponding to the random number table.

  The GPS unit 515 measures the time difference between the time when the GPS signal is emitted from the GPS satellite and the time when the own device receives the GPS signal by the decoded code and the clock in the own device. Then, the time difference is multiplied by the propagation speed of the radio wave to calculate the distance from the GPS satellite to its own device (distance = speed × time). This time is synchronized with Coordinated Universal Time (UTC).

  Since the GPS satellites send accurate information on the orbit, the current location of the GPS satellites can be accurately known. Therefore, if the distance from the GPS satellite is known, the current location of the device is any point on the sphere centered on the GPS satellite and having the calculated distance as a radius. The GPS signal code string is repeatedly sent at intervals of about 1 ms. Since the propagation speed of the GPS signal is 400,000 km / second, the maximum measurement distance is 400,000 × 0.001 = 400 km. Therefore, it is necessary to know the current location of the device in advance with an accuracy of about 100 km.

  Thus, if the distance from three satellites among the GPS satellites is calculated, the current position of the own device is one of two points where three spherical surfaces intersect. In addition, one of the two points is far away from the point that can be predicted, and thus one point is determined in principle. However, in reality, the calculated candidate points for the current location (intersections of the three surfaces) are not two points. This is mainly because the accuracy of a clock mounted on the GPS unit 515 is lower than that of an atomic clock mounted on a GPS satellite, and an error occurs in the calculation result.

  For this reason, the GPS unit 515 receives GPS signals from a total of four GPS satellites. This can be considered that a solution is obtained by introducing new information (equation) with the error of the clock on the GPS unit 515 side as another unknown. In this way, the GPS unit 515 can obtain a substantially accurate current point that converges to one point by receiving GPS signals from four GPS satellites.

  The various sensors 516 are a vehicle speed sensor, an acceleration sensor, a G sensor, an angular velocity sensor, and the like, and their output values are used for calculation of the current location by the GPS unit 515, measurement of changes in speed and direction, and the like. The various sensors 516 also include sensors that detect each operation of the vehicle by the driver. The detection of each operation of the vehicle may be configured to detect, for example, steering operation, turn signal input, accelerator pedal depression, brake pedal depression, or the like. Further, the output values of the various sensors 516 may be data recorded by the drive recorder function.

  The various sensors 516 may have a configuration in which a trigger for storing the drive recorder image is set in advance and the drive recorder image is stored when the trigger is detected. The trigger is, for example, a trigger for storing the drive recorder image, and may be configured such that the output from the various sensors 516 is equal to or higher than a predetermined threshold or output that approximates a predetermined pattern. More specifically, for example, the triggers in the various sensors 516 may be set when a vibration exceeding a specified level or a predetermined vibration pattern is detected by the vibration sensor. The predetermined vibration pattern may be a vibration pattern that exhibits an abnormality such as a sudden rise. Further, the trigger may be set when, for example, a G sensor more than a prescribed value or a predetermined G pattern is detected by the G sensor. The predetermined G may be applied as long as the pattern shows an abnormality such as a sudden rise. Or the structure which makes the trigger the presence or absence of contact with others, the action | operation of an airbag, or the stop of a vehicle by the contact sensor of a vehicle body may be sufficient. Furthermore, the above-described triggers may be one or more, and a plurality of triggers may be combined.

  Of the functional configuration of the information recording apparatus 100 according to the embodiment, the recording unit 101 is based on the magnetic disk drive 504 and the optical disk drive 506, the detection unit 102 is based on various sensors 516, and the control unit 103 and the determination unit 104 are based on the CPU 501. Accordingly, the recording area 105 and the recording medium 106 realize their functions by the magnetic disk 505 and the optical disk 507, respectively.

(Contents of processing of navigation device 400)
Next, the contents of the process of the navigation device 400 according to the first embodiment will be described with reference to FIG. FIG. 6 is a flowchart of the process performed by the navigation device according to the first embodiment. In the flowchart of FIG. 6, the navigation device 400 first determines whether or not the vehicle is traveling (step S601). For example, the determination regarding the traveling of the vehicle may be made with reference to the outputs of the various sensors 516.

  In step S601, the camera 517 waits for the vehicle to travel and, when it is traveling (step S601: Yes), starts to capture a drive recorder image (step S602). The drive recorder image may be, for example, a moving image in a certain time such as an image around the vehicle.

  Subsequently, the CPU 501 controls the magnetic disk drive 504 and the optical disk drive 506 to overwrite and record the drive recorder image photographed in step S602 on a recording medium such as the magnetic disk 505 and the optical disk 507 (step S603). Overwrite recording is, for example, recording a moving image over a certain period of time by sequentially overwriting so as not to exceed the recording capacity of the recording medium, and has a recording medium for overwriting recording and a recording medium for overwriting recording To record.

  Next, the CPU 501 determines whether or not a trigger is detected (step S604). The trigger may be, for example, a trigger for storing the drive recorder image by the output of the various sensors 516. More specifically, the vibration sensor may be set when a vibration exceeding a specified level or a predetermined vibration pattern is detected by the vibration sensor. The predetermined vibration pattern may be a vibration pattern that shows an abnormality such as a sudden rising vibration. Further, the trigger may be set when, for example, a G sensor more than a prescribed value or a predetermined G pattern is detected by the G sensor. The predetermined G may be applied as long as the pattern shows an abnormality, such as a sudden rising G. Or the structure which makes the trigger the action | operation of the presence or absence of contact with others or an airbag by the contact sensor of a vehicle body may be sufficient.

  Further, the CPU 501 may be configured to detect a trigger by detecting a driving operation of a driver that causes dangerous behavior of the vehicle based on outputs of various sensors 516. More specifically, an unusual handle operation such as a handle operation at a specified angle or a special handle operation when drowsiness is observed without taking out a sudden handle or turn signal exceeding a predetermined angular velocity may be used as a trigger. Also, pedals that are different from normal, such as acceleration / deceleration exceeding the specified acceleration, no deceleration at intersections with no signal, no deceleration due to red signal (yellow signal), and special pedal operation when drowsiness It is good also as a structure which uses operation as a trigger. It should be noted that an abnormality in steering operation or pedal operation may be configured such that an operation pattern is registered in advance and compared with the registered operation pattern. Further, an intersection without a signal and other points that need to be stopped may be acquired based on map information recorded on a recording medium. The color of the signal may be determined from an image taken by the camera 517.

  In step S604, when a trigger is not detected (step S604: No), the navigation apparatus 400 determines whether or not the vehicle has finished traveling (step S609). For example, the determination regarding the traveling of the vehicle may be made with reference to the outputs of the various sensors 516. More specifically, it may be determined that the vehicle has finished traveling when the output of the various sensors 516 stops.

  When a trigger is detected in step S604 (step S604: Yes), the CPU 501 switches the recording destination of the drive recorder image that has been overwritten in step S603 (step S605). The recording destination is switched, for example, from a recording medium for overwriting recording such as a magnetic disk 505 and an optical disk 507 or a recording medium having a recording area for overwriting recording to a recording medium having a storage recording area or a recording area for storage. It is also possible to switch the recording destination. Then, the drive recorder image is stored in the recording medium for storage switched in step S605 or the recording medium having the recording area for storage (step S606). For example, the drive recorder image may be configured to store images at the detection time point when the trigger is detected in step S604, and the pre- and post-detection times before and after the detection point. Moreover, the structure which can set the time before detection and the time after detection by a passenger | crew may be sufficient.

  Subsequently, the CPU 501 returns the recording destination switched in step S605 (step S607). More specifically, for example, after the drive recorder image is stored in the recording medium for storage or the recording medium having the storage area for storage in step S606, the recording destination is the recording medium for overwriting recording or the recording medium for overwriting recording. It is also possible to return to the recording medium having the recording area and perform overwriting recording of the drive recorder image. Next, the CPU 501 determines whether or not a post-detection time has elapsed (step S608). When the time after detection does not elapse (step S608: No), the process returns to step S604 and the process is repeated. In other words, the drive recorder image is stored in step S606, and trigger detection is performed until the time after detection elapses. Then, every time a trigger is detected, the drive recorder image is continuously stored.

  In step S608, when the post-detection time has elapsed (step S608: Yes), the navigation apparatus 400 determines whether or not the vehicle has finished traveling (step S609).

  In step S609, when the running of the vehicle does not end (step S609: No), the process returns to step S603 to repeat overwriting recording of the drive recorder image. In step S609, when the vehicle has finished traveling (step S609: Yes), the series of processing ends.

  In the description of this figure, an image around the vehicle is taken and overwritten as a drive recorder image in step S602, but overwritten and recorded together with information related to the running state such as the output of various other sensors 516. It is good. In that case, at the stage where the trigger is detected in step S604, the detected detection time and the output at a certain time before and after the detection may be stored.

  As described above, according to the first embodiment, when the trigger is detected and the trigger is newly detected during the post-detection time for storing the drive recorder image, the drive recorder image is continuously displayed. Can be saved. Therefore, even in the case of continuous accidents due to running or ball hitting after hitting and escaping accidents, the interrupted portion of the drive recorder image can be eliminated. In addition, since it is possible to store images for drive recorders of continuous accidents without interruption, it is possible to provide accurate accident data for a series of accidents.

  Further, according to the first embodiment, after the time after detection after the trigger detection has elapsed, the drive recorder image is switched from the storage of the drive recorder image to the overwrite recording to continue the overwrite recording. It is possible to prevent the capacity of the recording medium from overflowing and to effectively use the recording medium. In other words, it is possible to reduce the load on the device and securely store necessary data.

  Further, according to the first embodiment, the drive recorder image is saved when a trigger is detected at the time of the attempted accident in addition to the time when the accident is encountered. Can be used widely for safe driving.

  The second embodiment of the present invention will be described below. In the second embodiment, an example in which the information recording device of the present invention is implemented by a navigation device mounted on a moving body such as a vehicle (including a four-wheeled vehicle and a two-wheeled vehicle) will be described. The peripheral device configuration of the navigation device according to the second embodiment is substantially the same as that shown in FIG. The hardware configuration of the navigation device according to the second embodiment is substantially the same as that shown in FIG.

(Contents of processing of navigation device 400)
Here, the contents of the process of the navigation device 400 according to the second embodiment will be described with reference to FIG. FIG. 7 is a flowchart of the process performed by the navigation device according to the second embodiment. In the flowchart of FIG. 7, the navigation device 400 first determines whether or not the vehicle is traveling (step S701). For example, the determination regarding the traveling of the vehicle may be made with reference to the outputs of the various sensors 516.

  In step S701, the camera 517 waits for the vehicle to travel and if the vehicle is traveling (step S701: Yes), starts to shoot a drive recorder image (step S702). The drive recorder image may be, for example, a moving image in a certain time such as an image around the vehicle.

  Subsequently, the CPU 501 controls the magnetic disk drive 504 and the optical disk drive 506 to overwrite and record the drive recorder image photographed in step S702 on a recording medium such as the magnetic disk 505 and the optical disk 507 (step S703). Overwrite recording is, for example, recording a moving image over a certain period of time by sequentially overwriting so as not to exceed the recording capacity of the recording medium, and has a recording medium for overwriting recording and a recording medium for overwriting recording To record.

  Next, the CPU 501 determines whether or not a trigger is detected (step S704). The trigger may be, for example, a trigger for storing the drive recorder image by the output of the various sensors 516. Moreover, it is good also as a structure which detects the driving operation of the driver who becomes a dangerous behavior of a vehicle by the output of various sensors 516, and detects a trigger.

  In step S704, when a trigger is not detected (step S704: No), the navigation apparatus 400 determines whether the vehicle has finished traveling (step S709). For example, the determination regarding the traveling of the vehicle may be made with reference to the outputs of the various sensors 516. More specifically, it may be determined that the vehicle has finished traveling when the output of the various sensors 516 stops.

  When a trigger is detected in step S704 (step S704: Yes), the CPU 501 switches the recording destination of the drive recorder image that has been overwritten in step S703 (step S705). The recording destination is switched, for example, from a recording medium for overwriting recording such as a magnetic disk 505 and an optical disk 507 or a recording medium having a recording area for overwriting recording to a recording medium having a storage recording area or a recording area for storage. It is also possible to switch the recording destination. Then, the drive recorder image is stored in the recording medium for storage switched in step S705 or the recording medium having the recording area for storage until the time has elapsed after detection (step S706). For example, the configuration may be such that the time after detection can be set by the passenger in the same manner as the time before detection. The post-detection time and the pre-detection time are, for example, a predetermined time before and after the detection time point at which the trigger is detected in step S704, and are time for storing the drive recorder image. In other words, the drive recorder image is stored for a pre-detection time before the detection time point when the trigger is detected and a post-detection time period after the trigger is detected.

  Subsequently, the CPU 501 returns the recording destination switched in step S705 (step S707). More specifically, for example, after the drive recorder image is stored in the recording medium for storage or the recording medium having the storage area for storage in step S706, the recording destination is the recording medium for overwriting recording or the recording medium for overwriting recording. It is also possible to return to the recording medium having the recording area and perform overwriting recording of the drive recorder image. Next, the CPU 501 determines whether or not the standby time has elapsed (step S708). The standby time may be, for example, a pre-detection time related to storage of an image for a drive recorder when a new trigger is further detected after a trigger has been detected and the post-detection time has elapsed. More specifically, in the storage of the drive recorder images based on the detection of successive triggers, the maximum time that the drive recorder images overlap may be set as the standby time. Here, when the standby time has not elapsed (step S708: No), the process returns to step S704 and the process is repeated. In other words, in step S706, the drive recorder image is stored until the time after detection, and trigger detection is performed until the standby time elapses. Then, every time a trigger is detected, the drive recorder image is continuously stored.

  In step S708, when the standby time has elapsed (step S708: Yes), the navigation device 400 determines whether or not the vehicle has finished traveling (step S709).

  In step S709, when the vehicle does not finish running (step S709: No), the process returns to step S703, and overwrite recording of the drive recorder image is repeated. In step S709, when the vehicle finishes running (step S709: Yes), the series of processes is finished as it is.

  In the description of this figure, an image around the vehicle is taken and overwritten as a drive recorder image in step S702, but overwritten and recorded together with other information relating to the running state such as the output of various sensors 516. It is good. In that case, at the stage where the trigger is detected in step S704, the detected detection time point and the output at a certain time before and after the detection time may be stored.

  As described above, according to the second embodiment, when a trigger is detected and a drive recorder image is stored, if the trigger is detected again during the standby time, the drive recorder continuously You can save images. Therefore, even in the case of continuous accidents due to running or ball hitting after hitting and escaping accidents, the interrupted portion of the drive recorder image can be eliminated. In addition, since it is possible to store images for drive recorders of continuous accidents without interruption, it is possible to provide accurate accident data for a series of accidents.

  As described above, according to the present invention, after a dangerous behavior of a moving object is detected, if a new dangerous behavior is detected within a certain time, the video data recording destination is continuously stored in the recording medium. Set. Therefore, even if there is a continuously dangerous behavior, video data can be continuously recorded without missing.

  Further, according to the present invention, when the trigger is detected and the trigger is detected again during the post-detection time for storing the drive recorder image, the drive recorder image can be continuously stored. it can. Therefore, even in the case of continuous accidents due to running or ball hitting after hitting and escaping accidents, the interrupted portion of the drive recorder image can be eliminated. In addition, since it is possible to store images for drive recorders of continuous accidents without interruption, it is possible to provide accurate accident data for a series of accidents.

  Furthermore, according to the present invention, after the time after detection after the trigger detection has passed, the recording medium for storing the drive recorder image is switched from the storage of the drive recorder image to the overwrite recording to continue the overwrite recording. Therefore, the recording medium can be effectively used. In other words, it is possible to reduce the load on the device and securely store necessary data.

  In addition, according to the present invention, in order to save the drive recorder image when a trigger at the time of an accident attempt (near incident) is detected in addition to the time when an accident is encountered, the saved drive recorder image is saved. It can be widely used for safe driving.

  In the present invention, the drive recorder images for the continuously detected triggers are stored continuously. However, the drive recorder images are stored and combined when there are overlapping portions. The configuration may be a series of images.

  In addition, the present invention has been described with respect to the first embodiment and the second embodiment. However, the present invention only needs to have at least one function of the first embodiment or the second embodiment. The general use of this invention can be aimed at by judging the continuous preservation | save by several time with respect to a continuous trigger.

  The information recording method described in this embodiment can be realized by executing a program prepared in advance on a computer such as a personal computer or a workstation. This program is recorded on a computer-readable recording medium such as a hard disk, a flexible disk, a CD-ROM, an MO, and a DVD, and is executed by being read from the recording medium by the computer. The program may be a transmission medium that can be distributed via a network such as the Internet.

Claims (6)

Detection means for detecting the dangerous behavior of the moving object;
Recording means for overwriting and recording a series of video data imaged from the moving body in a predetermined recording area;
When the recording means is controlled and a dangerous behavior is detected by the detection means, the recording destination of the video data for the first predetermined period from the first detection time point is recorded from the predetermined recording area to the recording medium. First control means to set to
When a dangerous behavior is newly detected by the detection means during the first predetermined period, the recording means is controlled to record the video data for the second predetermined period from the second detection time point. Second control means for setting the video data in the recording medium subsequent to the video data of the first predetermined period;
An information recording apparatus comprising: Detection means for detecting the dangerous behavior of the moving object;
Recording means for overwriting and recording a series of video data imaged from the moving body in a predetermined recording area;
When the recording means is controlled and a dangerous behavior is detected by the detection means, the recording destination of the video data for the first predetermined period from the first detection time point is recorded from the predetermined recording area to the recording medium. First control means to set to
When a dangerous behavior is newly detected by the detection unit after the first predetermined period has elapsed, the start point of the third predetermined period before and after the third detection point is the end point of the first predetermined period. A determination means for determining whether or not it is before
When it is determined by the determining means that it is before the end time of the first predetermined period, the recording means is controlled to obtain video data of a third predetermined period from the end time of the first predetermined period. Third control means for setting the recording medium subsequent to the video data of the first predetermined period;
An information recording apparatus comprising: In an information recording method for overwriting and recording a series of video data imaged from a moving body in a predetermined recording area,
A first detection step for detecting a dangerous behavior of the moving body;
When a dangerous behavior is detected by the first detection step, a recording destination of video data for a first predetermined period from the first detection time point is set to a recording medium from the predetermined recording area. The setting process of
A second detection step for detecting dangerous behavior during the first predetermined period;
When a dangerous behavior is detected by the second detection step, the video data of the second predetermined period from the second detection time point is set on the recording medium following the video data of the first predetermined period. A second setting step,
An information recording method comprising: In an information recording method for overwriting and recording a series of video data imaged from a moving body in a predetermined recording area,
A first detection step for detecting a dangerous behavior of the moving object;
When a dangerous behavior is detected by the first detection step, a recording destination of video data for a first predetermined period from the first detection time point is set to a recording medium from the predetermined recording area. The setting process of
A third detection step of detecting a dangerous behavior after the first predetermined period;
If a dangerous behavior is newly detected by the third detection step, whether the start time of the third predetermined period before and after the third detection time is before the end time of the first predetermined period A determination process for determining whether or not
If it is determined by the determining step that the current time is before the end of the first predetermined period, video data of a third predetermined period from the end of the first predetermined period is A third setting step for setting the recording medium following the video data;
An information recording method comprising:   An information recording program for causing a computer to execute the information recording method according to claim 3 or 4.   A computer-readable recording medium on which the information recording program according to claim 5 is recorded.

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