JP6568406B2 - Drive recorder - Google Patents

Description

  The present invention relates to a drive recorder mounted on a vehicle as a vehicle-mounted device, and more particularly to a technique for executing data recording at each point registered in a hazard map.

  A typical drive recorder mounted on a vehicle automatically records data mainly composed of images taken by an in-vehicle camera on a recording medium when a large acceleration applied to the vehicle is detected. To do. Alternatively, when image data is always recorded and a large acceleration is detected, data representing the occurrence of an abnormality is recorded on the recording medium together with the image.

  By the way, when driving a vehicle, a dangerous situation may be encountered. A dangerous situation may occur due to driver's carelessness or reckless driving, or due to careless driving of other vehicles. In addition, a dangerous situation may occur due to the road environment at that time, such as a bad view at an intersection or a sharp curve. In the latter case, even if the driver tries to drive safely, there is a high possibility that the same dangerous situation will be encountered again at the same point.

  In other words, there are actually dangerous places on the road where dangerous situations are likely to occur. In such places, the driver must operate with special care not to encounter dangerous situations. There is.

  Conventionally, hazard map information including information indicating the position of a dangerous point is obtained using an event database in which a large number of recorded data including position and acceleration information is stored for each event detected in the past for a predetermined vehicle. The technique to generate | occur | produce is known (patent document 1).

  A drive recorder that uses such a hazard map is also known (Patent Document 2). In this drive recorder, a trigger is generated when the host vehicle approaches a specific point, and data recording is automatically executed according to the trigger. Therefore, for example, when a specific vehicle passes through a high-risk point, data such as video that can be used to confirm whether the driver was driving safely is automatically recorded by the drive recorder. Is possible.

JP 2012-190398 A JP 2015-41277 A

  By the way, the location of each point registered in the hazard map as a dangerous point is often an intersection on the road or its vicinity. Therefore, there are many opportunities for the host vehicle to decelerate or temporarily stop in the vicinity of such a danger point. However, in the case where the host vehicle stays long due to a temporary stop or the like within a certain range near the danger point, the drive recorder of Patent Document 2 may not record highly important timing data. is there.

  That is, when using the conventional drive recorder as in Patent Document 2, when the host vehicle reaches within a certain distance from the danger point, a trigger is generated inside the drive recorder. Data is recorded only for the time. However, if the host vehicle stays long because of a temporary stop in the vicinity of the danger point, the host vehicle may end the temporary stop and start moving after the data recording of the drive recorder ends. In this case, for example, video data of a scene indicating whether or not the driver of the host vehicle has started traveling after checking the left and right safety after the temporary stop is not recorded.

  For example, in a company that operates a business vehicle such as a taxi vehicle, it is necessary for an administrator to grasp whether or not a crew member of each vehicle is driving safely to ensure safety. And the manager can confirm whether each crew member is performing safe driving by referring data, such as a picture which a drive recorder of each vehicle recorded. However, if important data is missing in the vicinity of the dangerous point, it cannot be confirmed by video whether or not safe driving is performed.

  The present invention has been made in view of the above situation, and when the host vehicle travels in the vicinity of a registered danger point, it fails to record data representing the driving situation of a highly important scene. An object of the present invention is to provide a drive recorder that can be prevented.

In order to achieve the above-described object, the drive recorder according to the present invention is characterized by the following (1) to (6).
(1) A drive recorder that is mounted on a vehicle and acquires and records at least information representing the situation in the vicinity of the host vehicle when regularly or when a predetermined condition is satisfied,
A hazard map that holds location information for multiple locations registered in advance,
A first important information recording control unit that automatically records important information indicating the situation at a corresponding point based on the distance between the current position of the host vehicle and the position of each point registered in the hazard map. When,
In a situation where the distance between the current position of the host vehicle and each point registered in the hazard map is within a predetermined range, the elapsed time is measured, and a predetermined change of the host vehicle or A second important information recording control unit for generating a trigger for recording the important information when a predetermined driving operation is detected;
It is provided with.

  According to this drive recorder, the host vehicle stays in the vicinity of one point registered in the hazard map in a state such as being temporarily stopped, and the recording of the important information by the control of the first important information recording control unit is completed. After that, even when the host vehicle resumes running, data representing the driving situation of the scene with high importance can be recorded. In other words, the second important information recording control unit can generate a trigger at a timing similar to when the host vehicle resumes running. If important information is recorded using this trigger, for example, before the host vehicle resumes running, an image including a scene indicating whether the crew member of the host vehicle has performed a left-right safety check operation is recorded. be able to.

(2) In the drive recorder described in (1),
In the situation where the distance between the current position of the host vehicle and each point registered in the hazard map is within a predetermined range, the second important information recording control unit Generating the trigger when an acceleration or an operation for acceleration is detected;
It is characterized by that.

  According to this drive recorder, for example, when the host vehicle resumes driving and accelerates from a temporarily stopped state, the second important information recording control unit generates the trigger. The trigger can be generated at a timing suitable for recording. That is, the video of an important scene can be recorded like the operation of confirming the left and right safety of the crew before resuming traveling.

(3) In the drive recorder described in (2),
The second important information recording control unit determines whether the traveling speed of the host vehicle after a predetermined time has elapsed in a situation where the distance between the current position of the host vehicle and each point registered in the hazard map is within a predetermined range. And when the change in the increasing direction of the traveling speed becomes a predetermined value or more, the trigger is generated.
It is characterized by that.

  According to this drive recorder, since the second important information recording control unit generates the trigger based on the traveling speed of the host vehicle, various types of signals need to be given to the second important information recording control unit. In addition, the trigger can be generated only with relatively simple control.

(4) In the drive recorder described in (1),
An alarm output control unit that outputs a predetermined alarm when the distance between the current position of the host vehicle and the position of each point registered in the hazard map is within a first threshold;
Further comprising
The first important information recording control unit compares the distance between the current position of the host vehicle and the position of each point registered in the hazard map with a second threshold value smaller than the first threshold value, When the distance falls within the second threshold, the important information is recorded,
The second important information recording control unit compares the distance between the current position of the host vehicle and the position of each point registered in the hazard map with the second threshold value, and the distance is the second threshold value. The trigger is generated when a predetermined change of the own vehicle or a predetermined driving operation on the own vehicle is detected within a certain time.
It is characterized by that.

  According to this drive recorder, when the host vehicle approaches one point registered in the hazard map, an alarm is generated and the driver is alerted before reaching the high risk point. Can be urged. In addition, since the distance between the point and the host vehicle is identified by using two types of thresholds separately, it is possible to generate an alarm and record the important information at appropriate timings.

(5) In the drive recorder described in (1),
The first important information recording control unit and the second important information recording control unit record, as the important information, at least information of an image taken by an in-vehicle camera mounted on the host vehicle.
It is characterized by that.

  According to this drive recorder, information including video can be recorded as the important information. Therefore, for example, if a crew member is photographed with an in-vehicle camera, it is also possible to record a video showing a scene of the crew's safe driving operation.

(6) In the drive recorder described in (1),
A position information acquisition unit for acquiring information on latitude and longitude representing the current position of the host vehicle;
The first important information recording control unit and the second important information recording control unit represent the latitude and longitude of the position information acquired by the position information acquisition unit, and the position of each point registered in the hazard map. Calculate the distance based on latitude and longitude,
It is characterized by that.

  According to this drive recorder, since the distance between the current position of the host vehicle and the position of each point registered in the hazard map can be correctly grasped, important information can be recorded at an appropriate timing.

  According to the drive recorder of the present invention, it is possible to prevent a failure in recording data representing a driving situation of a highly important scene when the host vehicle travels in the vicinity of a registered dangerous point. . That is, even if the host vehicle stays in the vicinity of the danger point for a long time such as in a pause state, the second important information recording control unit outputs a trigger at an appropriate timing. Important information including a scene representing the presence or absence of a crew member's safety confirmation operation before resuming traveling can be recorded according to the trigger.

  The present invention has been briefly described above. Further, the details of the present invention will be further clarified by reading through a mode for carrying out the invention described below (hereinafter referred to as “embodiment”) with reference to the accompanying drawings. .

FIG. 1 is a flowchart showing the main control contents of the drive recorder in the embodiment of the present invention. FIG. 2 is a block diagram showing a configuration example of the drive recorder in the embodiment of the present invention. FIG. 3 is a plan view showing a specific example of the relationship between the road on which the vehicle travels, the registered danger point, and the circular area.

  Specific embodiments relating to the present invention will be described below with reference to the drawings.

<Configuration example of drive recorder>
A configuration example of the drive recorder of the present embodiment is shown in FIG. The drive recorder 10 shown in FIG. 2 is used in the state mounted in the vehicle as an onboard equipment.

  As shown in FIG. 2, the drive recorder 10 includes a microcomputer (CPU) 11, an in-vehicle camera 12, an acceleration sensor (G sensor) 13, a vehicle speed sensor 14, a GPS receiver 15, a recording medium 16, a recording medium 17, and a temporary A storage memory 18, a human machine interface (HMI) unit 19, interfaces (I / F) 21 and 22, a speed interface 23, and a hazard map database (DB) 30 are provided.

  The microcomputer 11 executes a program incorporated in advance and performs processing for realizing various functions required for the drive recorder 10. The drive recorder 10 of the present embodiment has a function of automatically recording information such as image data and a function for supporting driving. These functions and processing of the microcomputer 11 will be described in detail later.

  Although FIG. 2 shows the case where the in-vehicle camera 12 is one, in the actual drive recorder 10, a plurality of in-vehicle cameras 12 can be connected to the drive recorder 10 as necessary.

  The in-vehicle camera 12 is installed, for example, in the vicinity of the front windshield of the vehicle, shoots a scene such as a road ahead of the traveling direction of the own vehicle or another vehicle, and continuously captures a video signal including the content of the captured video frame. Output intermittently or intermittently.

  For example, when the drive recorder 10 is mounted on a business vehicle such as a taxi vehicle and is used for managing the safe driving of the crew, an in-vehicle camera 12 facing the direction in which the driving situation of the crew can be photographed Place in the passenger compartment.

  The acceleration sensor 13 can detect longitudinal and lateral acceleration applied to the host vehicle and output an electrical signal representing the magnitude of the acceleration. When a dangerous situation or a traffic accident occurs, a large acceleration is applied to the host vehicle, and therefore it is possible to identify whether or not the situation is dangerous based on a signal output from the acceleration sensor 13.

  The vehicle speed sensor 14 outputs a pulse signal (vehicle speed pulse) corresponding to the rotation of the output shaft of the transmission of the host vehicle. Based on the number of pulses of the pulse signal and the pulse generation period, the moving amount and moving speed (vehicle speed) of the host vehicle can be detected.

  The GPS receiver 15 can receive radio waves arriving from a plurality of GPS (Global Positioning System) satellites and calculate the current position (latitude / longitude) of the vehicle based on the timing of the received signals.

  Each of the recording media 16 and 17 is used for storing a large amount of data recorded by the drive recorder 10 over a long period of time. Accordingly, the recording media 16 and 17 are configured by a recording medium with a built-in nonvolatile memory, such as a CF card or an SD card. Although not shown, the recording media 16 and 17 are mounted in a card slot provided in the drive recorder 10 in a state where they can be easily attached and detached. In the present embodiment, the drive recorder 10 can selectively use the two recording media 16 and 17.

  The temporary storage memory 18 is a memory from which data can be freely read and written by accessing the microcomputer 11, and is composed of, for example, SDRAM. The temporary storage memory 18 is used by the microcomputer 11 as a working storage area, and is used to hold temporarily generated data and the like for a short period of time.

  The human machine interface (HMI) unit 19 has a function for providing necessary information to a user such as a driver. Specifically, it has at least one function such as a function for outputting a message such as a warning or guidance by outputting a synthesized pseudo audio signal, and a function for displaying a message including characters and figures on the screen as visible information. doing.

  The interface 21 processes the video signal output from the in-vehicle camera 12 and generates image data that can be processed by the microcomputer 11 for each frame of the video. The interface 22 processes an acceleration signal output from the acceleration sensor 13 and outputs data representing the magnitude of acceleration that can be processed by the microcomputer 11. The speed interface 23 receives a vehicle speed pulse signal output from the vehicle speed sensor 14 and performs a conversion process so as to conform to a signal standard that can be processed by the microcomputer 11.

  The hazard map database 30 holds data on latitude and longitude, which are position information representing each of various risk points determined in advance. As dangerous points to be registered in the hazard map database 30, for example, points where traffic accidents are likely to occur, or points where crew members feel dangerous in the past are assumed. For example, since traffic accidents are likely to occur at intersections where a plurality of roads intersect and where no traffic lights exist, such points are registered in the hazard map database 30 as dangerous points.

  In addition, about the data used as the foundation of the hazard map database 30, it is possible to create based on the result of having analyzed the data which the drive recorder recorded, for example as disclosed by patent document 1. FIG.

  Further, such a hazard map database 30 is usually created on a management device (for example, a personal computer) disposed in an office of a company (taxi company, transportation company, etc.) that manages a large number of business vehicles. It is assumed that Then, by transferring the information from the office management device to the drive recorder 10 installed in each vehicle via the recording medium 17, each drive recorder 10 can use the hazard map database 30 updated to the latest information. Become. Moreover, when the drive recorder 10 has a communication function, it is also possible to obtain the latest data in the hazard map database 30 online from a server outside the vehicle.

<Description of operation>
<Outline of operation of drive recorder 10>
FIG. 3 shows a specific example of a state where a part of the road on which the vehicle travels as seen from a road map is viewed from above. FIG. 3 shows a situation in the vicinity of an intersection where two roads 51 and 52 intersect. In addition, a registered dangerous point P1 is assigned near the intersection.

  The drive recorder 10 calculates the distance between the position of the own vehicle and the registered position of the dangerous point P1, identifies whether the own vehicle 55 has approached the dangerous point P1, and alerts the crew. The alarm is output and a recording trigger is generated to automatically record data such as video representing the driving situation for a certain period of time.

  Specifically, the drive recorder 10 identifies whether or not the position of the host vehicle 55 is within the area for each of the two circular areas Aa and Ab having different distances from the danger point P1. The circular area Aa is inside the circle with a radius Ra centered on the position of the danger point P1. Further, the circular area Ab is inside the circle having a radius Rb with the center at the position of the danger point P1. Further, the circular regions Aa and Ab are determined so as to satisfy the condition of (Ra> Rb).

  The drive recorder 10 outputs an alarm when the host vehicle 55 enters the inside of the circular area Aa. In addition, when the own vehicle 55 enters the inside of the circular area Ab, the drive recorder 10 generates a trigger and records data for a predetermined time (first important information recording control).

  Accordingly, the first important information recording control automatically displays a video including a scene indicating whether or not the crew of the host vehicle 55 is performing a safe driving (such as a left-right confirmation operation before restarting driving) at the intersection of the dangerous point P1. It is possible to record.

  However, it is conceivable that after the host vehicle 55 travels and enters the inside of the circular area Ab, the traveling is resumed after staying in the circular area Ab for a long time in a state of being temporarily stopped in front of the intersection. In that case, it is also assumed that the host vehicle 55 resumes running after the data recording operation is terminated due to the time limit (for example, 60 seconds) of the first important information recording control. Therefore, there is a possibility that the first important information recording control cannot record the scene image indicating whether the crew member has performed the safe driving before the own vehicle 55 resumes traveling.

  Therefore, the drive recorder 10 further performs second important information recording control. In the second important information recording control, it is identified whether or not a predetermined time has elapsed after detecting that the host vehicle 55 has entered the inside of the circular area Ab. When an acceleration operation of the host vehicle 55 is detected after a certain time has elapsed, a trigger is generated and data is recorded for a certain time.

  Therefore, when the host vehicle 55 stays long inside the circular area Ab and the host vehicle 55 resumes running after the first important information recording control ends, the second important information recording control Important data including scenes of crew safety checks are recorded.

<Contents of main control>
The main control contents of the drive recorder 10 shown in FIG. 2 are shown in FIG. That is, when the microcomputer 11 of the drive recorder 10 executes the process of FIG. 1, the characteristic operation of the drive recorder 10 in this embodiment is realized.

  For example, when the ignition of the vehicle is turned on and power supply to the drive recorder 10 is started, the microcomputer 11 starts processing from step S11 in FIG. Further, the process of FIG. 1 is repeatedly executed.

  In step S <b> 11, the microcomputer 11 uses the GPS receiver 15 to acquire position information (latitude and longitude) data indicating the current position of the host vehicle.

  In step S12, the microcomputer 11 determines the position (latitude, longitude) of the nearest point (corresponding to P1 in FIG. 3) among the points registered in the hazard map database 30, and the own vehicle acquired in S11. A linear distance L between the current position (latitude and longitude) is calculated.

  In step S13, the microcomputer 11 compares the linear distance L calculated in S12 with the reference value Ra of the radius of the circle indicating the circular area Aa in FIG. If the condition “L <Ra” is satisfied, the process proceeds to S14. If the condition is not satisfied, the process ends. The radius reference value Ra is incorporated in advance in the program of the microcomputer 11 as a constant, or is registered as a changeable threshold on the hazard map database 30 or the recording medium 17.

  In step S14, the microcomputer 11 controls the human machine interface unit 19 to display a message such as “There is a lot of accidents ahead, so be careful because it is dangerous” and output a voice. Output an alarm. Note that the alarm in step S14 is output only once when it is detected that the first entry has entered the circular area Aa.

  In step S15, the microcomputer 11 compares the linear distance L calculated in S12 with the reference value Rb of the radius of the circle indicating the circular region Ab in FIG. If the condition of “L <Rb” is satisfied, the process proceeds to S16. If the condition is not satisfied, the process proceeds to S22. The radius reference value Rb is incorporated as a constant in the program of the microcomputer 11 in advance, or registered as a changeable threshold value on the hazard map database 30 or the recording medium 17.

  In step S <b> 16, the microcomputer 11 identifies whether or not the elapsed time after the host vehicle has entered the range of the circular area Ab has reached a predetermined time “t”. If the time measurement has not started yet, or if the predetermined time “t” has not elapsed, the process proceeds to S17, and if the predetermined time “t” has elapsed, the process proceeds to S19.

  In step S <b> 17, the microcomputer 11 starts measuring the fixed time “t”. It is assumed that this time “t” is set to 60 seconds, for example.

  In the next step S18, the microcomputer 11 generates a trigger for data recording. On the basis of the timing at which this trigger occurs, the microcomputer 11 uses the data such as the video from the in-vehicle camera 12 as important information as a recording medium 16 for a certain time (for example, 60 seconds: equal to or less than the time “t”). Alternatively, it is automatically recorded on the recording medium 17. S18 is the first important information recording control.

  The processes in steps S17 and S18 are executed only once when it is detected that the current position of the host vehicle first enters the circular area Ab.

  In step S19, the microcomputer 11 identifies the presence or absence of acceleration of the host vehicle. That is, it is identified whether or not the host vehicle has entered a state in which traveling is resumed from a stopped state. Actually, it is identified whether or not the vehicle speed detected by the vehicle speed sensor 14 is equal to or higher than a predetermined value from a state close to zero. If acceleration is detected, the process proceeds from S19 to S20.

  Instead of detecting the actual acceleration of the vehicle from the vehicle speed in S19, an acceleration driving operation may be detected. For example, the presence or absence of acceleration of the vehicle can be identified based on the depression state of the accelerator pedal of the vehicle and the throttle opening.

  In step S20, the microcomputer 11 generates a trigger for data recording. On the basis of the timing at which this trigger occurs, the microcomputer 11 uses the data such as the video from the in-vehicle camera 12 as important information as a recording medium 16 for a certain time (for example, 60 seconds: equal to or less than the time “t”). Alternatively, it is automatically recorded on the recording medium 17. S20 is the second important information recording control.

  At the timing when acceleration is detected in step S19, the crew member safety confirmation operation may have already been completed. Therefore, especially when data is recorded by the trigger generated in S20, the data of the past video captured before the timing at which the trigger is generated is also recorded. This makes it possible to reliably record important information.

  Actually, data such as images taken within a certain past time is always recorded as temporary data on the temporary storage memory 18, and old data older than a predetermined time can be erased and newly recorded. Reserve space. When a trigger occurs in S20, the data of the past video captured before the trigger timing can be acquired by reading data from the temporary storage memory 18, and can be recorded on the recording medium 16 or 17.

  In the next step S21, the microcomputer 11 finishes the time measurement started in step S17. The processes in steps S20 and S21 are executed only once when acceleration is detected in S19.

  In step S22, the microcomputer 11 ends the time measurement started in step S17. When time measurement has not yet started, nothing is done in S22.

  The control shown in FIG. 1 assumes the case of the trigger recording mode in which data is recorded for a predetermined time according to the generated trigger. However, the control of the present invention is also applied when operating in the constant recording mode. it can. For example, as shown in Patent Document 2, it is possible to perform control for switching the quality of data to be recorded in accordance with the presence or absence of a trigger. In other words, by executing high-resolution data recording only at the timing when the trigger occurs, important information can be recorded in a high-quality state, and at other timings, data can be recorded for a long time by reducing the recording quality. Recording is possible.

<Advantages of the drive recorder 10>
In the drive recorder 10 shown in FIG. 2, by performing the control shown in FIG. 1, even if the own vehicle 55 stays in the circular area Ab shown in FIG. When accelerating and restarting operation, a trigger can be output in step S20. That is, even when an important video is shot after the recording operation by the trigger in step S18 is finished, an important video by the recording operation by the trigger in step S20, that is, an operation for confirming the safety of the crew at the time of restarting operation. It is possible to reliably record an image of a scene indicating the presence or absence.

  Further, the drive recorder 10 informs the crew member that the vehicle is approaching the registered danger point P1 when the vehicle enters the circular area Aa having a radius larger than that of the circular area Ab. The crew can be encouraged to perform safe driving in the area Aa.

<Supplementary explanation>
The characteristic items included in the drive recorder 10 described above are listed below.
[1] A drive recorder that is mounted on a vehicle and that acquires and records at least information representing the situation in the vicinity of the host vehicle when regularly or when a predetermined condition is satisfied,
A hazard map (hazard map database 30) that holds location information of a plurality of points registered in advance;
A first important information recording control unit that automatically records important information indicating the situation at a corresponding point based on the distance between the current position of the host vehicle and the position of each point registered in the hazard map. (11, S18),
The elapsed time is measured when the distance between the current position of the host vehicle and each point registered in the hazard map is within a predetermined range, and a predetermined change of the host vehicle after a predetermined time has passed, A second important information recording control unit (11, S20) that generates a trigger for recording the important information,
A drive recorder comprising:

[2] When the distance between the current position of the host vehicle and each point (danger point P1) registered in the hazard map is within a predetermined range, the second important information recording control unit sets a predetermined time (t). The trigger is generated when a predetermined acceleration or an operation for accelerating the vehicle is detected (S19) after elapse.
The drive recorder according to [1] above, wherein

[3] When the distance between the current position of the host vehicle and each point registered in the hazard map is within a predetermined range, the second important information recording control unit Monitoring the traveling speed, and generating the trigger when a change in the increasing direction of the traveling speed exceeds a predetermined value;
The drive recorder according to [2] above, wherein

[4] An alarm output that outputs a predetermined alarm when the distance between the current position of the host vehicle and the position of each point registered in the hazard map is within a first threshold (radius reference value Ra). Control unit (11, S13, S14),
Further comprising
The first important information recording control unit sets a distance between the current position of the host vehicle and the position of each point registered in the hazard map to a second threshold value (radius reference value) smaller than the first threshold value. Rb), the important information is recorded when the distance falls within the second threshold (S18),
The second important information recording control unit compares the distance between the current position of the host vehicle and the position of each point registered in the hazard map with the second threshold value, and the distance is the second threshold value. And after a predetermined time (t), when the predetermined change of the own vehicle or the predetermined driving operation on the own vehicle is detected (S19), the trigger is generated (S20),
The drive recorder according to [1] above, wherein

[5] The first important information recording control unit and the second important information recording control unit record, as the important information, at least video information captured by an in-vehicle camera (12) mounted on the host vehicle. To
The drive recorder according to [1] above, wherein

[6] A position information acquisition unit (GPS receiver 15, S11) for acquiring latitude and longitude information representing the current position of the host vehicle,
The first important information recording control unit and the second important information recording control unit represent the latitude and longitude of the position information acquired by the position information acquisition unit, and the position of each point registered in the hazard map. Based on the latitude and longitude, the distance is calculated (S12),
The drive recorder according to [1] above, wherein

DESCRIPTION OF SYMBOLS 10 Drive recorder 11 Microcomputer 12 Car-mounted camera 13 Acceleration sensor 14 Vehicle speed sensor 15 GPS receiver 16, 17 Recording medium 18 Memory for temporary storage 19 Human machine interface (HMI) part 21, 22 interface 23 Speed interface 30 Hazard map database 51, 52 Road 55 Own vehicle Aa, Ab Circular area P1 Registered danger point Ra, Rb Radius reference value t Time reference value

Claims (6)

A drive recorder that is mounted on a vehicle and that acquires and records at least information representing the situation in the vicinity of the host vehicle when the predetermined condition is met or regularly,
A hazard map that holds location information for multiple locations registered in advance,
A first important information recording control unit that automatically records important information indicating the situation at a corresponding point based on the distance between the current position of the host vehicle and the position of each point registered in the hazard map. When,
The elapsed time is measured when the distance between the current position of the host vehicle and each point registered in the hazard map is within a predetermined range, and a predetermined change of the host vehicle after a predetermined time has elapsed, or a predetermined amount with respect to the host vehicle A second important information recording control unit that generates a trigger for recording the important information,
A drive recorder comprising: When the distance between the current position of the host vehicle and each point registered in the hazard map is within a predetermined range, the second important information recording control unit accelerates the host vehicle more than a predetermined amount after a predetermined time has elapsed. Or generating the trigger when detecting an operation for acceleration,
The drive recorder according to claim 1. When the distance between the current position of the host vehicle and each point registered in the hazard map is within a predetermined range, the second important information recording control unit determines the traveling speed of the host vehicle after a predetermined time has elapsed. Monitoring and generating the trigger when a change in the direction of increase in the traveling speed becomes a predetermined value or more,
The drive recorder according to claim 2. An alarm output control unit that outputs a predetermined alarm when the distance between the current position of the host vehicle and the position of each point registered in the hazard map is within a first threshold;
Further comprising
The first important information recording control unit compares the distance between the current position of the host vehicle and the position of each point registered in the hazard map with a second threshold value smaller than the first threshold value, When the distance falls within the second threshold, the important information is recorded,
The second important information recording control unit compares the distance between the current position of the host vehicle and the position of each point registered in the hazard map with the second threshold value, and the distance is the second threshold value. The trigger is generated when a predetermined change of the own vehicle or a predetermined driving operation on the own vehicle is detected within a certain time.
The drive recorder according to claim 1. The first important information recording control unit and the second important information recording control unit record, as the important information, at least information of an image taken by an in-vehicle camera mounted on the host vehicle.
The drive recorder according to claim 1. A position information acquisition unit for acquiring information on latitude and longitude representing the current position of the host vehicle;
The first important information recording control unit and the second important information recording control unit represent the latitude and longitude of the position information acquired by the position information acquisition unit, and the position of each point registered in the hazard map. Calculate the distance based on latitude and longitude,
The drive recorder according to claim 1.

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