KR100796265B1 - Black box for vehicle - Google Patents

Abstract

A black box for a vehicle is provided to generate auxiliary data used for analyzing details of an accident by additionally installing a camera having a simple structure. A black box for a vehicle comprises an X-axis acceleration sensor(120) that reads an acceleration value in the X-axis direction. A Y-axis acceleration sensor(130) is perpendicular to the X-axis acceleration sensor(120) to read an acceleration value in an Y-axis direction. A controller(110) calculates jerk values in the X-axis or Y-axis direction based on the acceleration value read by the X-axis or Y-axis acceleration sensor, and determine if the jerk values belong to a preset jerk range. When the controller(110) determines that an accident has occurred, a memory(170) stores acceleration values in the X-axis or Y-axis direction during a certain time period before and after the accident. The X-axis and Y-axis acceleration sensors are attached to certain positions of the vehicle.

Description

Black Box for Vehicle

Figure 1a shows an internal block diagram of a vehicle black box according to an embodiment of the present invention,

Figure 1b shows an internal block diagram of a vehicle black box according to another embodiment of the present invention,

Figure 2 is for explaining the mounting position of the camera shown in Figure 1,

3 is a flow chart for explaining the operation of the vehicle black box according to the present invention,

4 to 8 are diagrams for explaining an example of analyzing the accident situation based on the data stored in the vehicle black box according to the present invention,

9 and 10 are diagrams for explaining an example of analyzing the accident situation based on the data photographed by the camera of the vehicle black box according to the present invention.

<Explanation of symbols for the main parts of the drawings>

 110: control unit

 120, 130, 140, 131: acceleration sensor

 150: display unit 160: external data connection unit

 170: memory 180: power

 190 camera

The present invention relates to a vehicle black box, and to a vehicle black box of a simple structure simple.

Most of the vehicle black boxes that have been filed so far are a digital driving recorder which periodically records the speed, time and brake state of the vehicle, or a drive recorder device that stores information such as brake state and engine speed, or a vehicle in case of a vehicle crash. Vehicle moving path tracking device that detects and stores the moving route, speed, time, etc. through vehicle video storage device or GPS system that compresses / stores internal / external video and audio data or vehicle theft, fire, traffic information, emergency emergency Telematics technology that performs signal transmission.

However, in the above-described conventional black box technology, the device is complicated by the fact that the relevant information is directly received from the vehicle to accurately analyze the situation immediately before the accident, and thus, the economical efficiency of the device is not achieved, thereby failing to achieve the popular practical use.

In addition, the vehicle black box using the camera filed to date is a structure that stores a long time video signal from before the accident to a certain time after the accident, requires a mass storage device, and it is complicated and commercialized as a micro computer is built in. There has been a limit.

On the other hand, the accident detection sensor is also designed to detect the impact directly in case of an accident by attaching a number of shock detection sensors to each part of the vehicle, and the difficulty of mounting the vehicle also acts as one of the obstacles of popularization, bringing limitations to the popular practical use. .

An object of the present invention for solving the above problems is to provide a vehicle black box capable of accident analysis with only the change data of the acceleration in the longitudinal direction / transverse direction (X-axis / Y-axis).

Another object of the present invention is to provide a black box for a vehicle that can provide auxiliary data for analyzing an accident situation by adding a camera having a simple structure.

It is still another object of the present invention to increase the reliability of accident history analysis even with only the basic simple data described above, and to realize the popular practical use of the black box.

According to an aspect of the present invention, there is provided a vehicle black box comprising: an X-axis acceleration sensor for reading an acceleration value in the X-axis direction; A Y-axis acceleration sensor for reading acceleration values in the Y-axis direction; Based on the acceleration read from the X-axis or Y-axis acceleration sensor, a value of X-axis or Y-axis jerk (Jerk = da / dt, da is acceleration change amount, dt is time change amount) is obtained, and X is obtained. A control unit for detecting an accident by determining whether the axial direction or the Y-axis direction jerk value is within a set jerk value range; If it is determined by the control unit as an accident, a memory for storing the acceleration value in the X-axis direction or Y-axis direction for a predetermined time before and after the accident.

Here, it is preferable to further include a Z-axis acceleration sensor for reading the acceleration value in the Z-axis direction to use as an auxiliary means of accident determination.

Here, the X-axis acceleration sensor or the Y-axis acceleration sensor is a one-axis acceleration sensor capable of measuring any one-way acceleration and is preferably positioned so that the acceleration detection directions are perpendicular to each other.

Here, the X-axis acceleration sensor and the Y-axis acceleration sensor, it is also preferably composed of one 2-axis acceleration sensor that can measure the X-axis and Y-axis acceleration together.

Here, when it is determined that the accident by the control unit, it may be made further comprising a camera for taking an image.

Here, the camera is a still image camera, the still image camera and the first camera for omnidirectional shooting; And a second camera for photographing the left or right direction positioned at right angles to the first camera, and when determined to be an accident by the controller, the still image camera is photographed first when an accident is determined and the first It is implemented to perform the second shooting after a predetermined time after the shooting.

Here, the camera is a video camera, the video camera includes a first camera for omnidirectional shooting; And a second camera for left- or right-direction photographing, formed at a right angle with the first camera, wherein the video camera is stored in a memory in a first-in, first-out manner after continuous shooting from before an accident, and a predetermined time elapses from the accident determination. After the shooting is stored in the memory until the shooting is characterized in that the end.

Hereinafter, a vehicle black box according to the present invention will be described in detail with reference to the accompanying drawings.

1A illustrates an internal block diagram of a vehicle black box according to an embodiment of the present invention, and FIG. 1B illustrates an internal block diagram of a vehicle black box according to another embodiment of the present invention.

The XYZ axis, which will be described below, refers to the X-axis (longitudinal direction) of the vehicle with respect to the vehicle, the Y-axis (lateral direction) perpendicular to the traveling direction of the vehicle and the horizontal direction, and the direction perpendicular to the traveling direction of the vehicle. It is explained by setting in the Z axis (up and down direction).

The internal block diagrams of the vehicle black box shown in FIGS. 1A and 1B are the same, but there are differences in the types of acceleration sensors. In the case of Figure 1a consists of two or three one-axis acceleration sensors for measuring one-way acceleration to measure the acceleration of the X-axis, Y-axis, Z-axis, while in the case of Figure 1b the acceleration of the XY axis or XYZ axis It consists of one 2-axis accelerometer or one 3-axis accelerometer which can be measured simultaneously.

1A and 1B, the vehicle black box according to the present invention includes a controller 110, an acceleration sensor 120, 130, 140, and 131, a display unit 150, an external data connection unit 160, and a memory. 170, a power source 180, and a camera 190.

When the acceleration change of the vehicle is detected by the acceleration sensors 120, 130, and 131, the controller 110 is responsible for controlling data to be recorded in the memory 170 or to operate the camera 190.

A jerk is obtained based on the acceleration values obtained by the acceleration sensors 120, 130, and 131, and the jerk value is compared with the set jerk value to record the acceleration data or perform the operation of the camera 190.

Here, jerk means an acceleration change per unit time, Jerk = da / dt, da is an acceleration change, and dt is a required time.

Here, the acceleration sensor 140 that can specify the Z-axis acceleration is used as an auxiliary means for distinguishing the acceleration change caused by the accident and the external shock generated during normal driving by further detecting the acceleration change in the vertical direction of the vehicle. That is, when the acceleration change of the vehicle in the vertical direction due to the speed bumps affects the acceleration change of the X-axis and the Y-axis much, the Z-axis acceleration sensor can be judged not as an accident but as a change in general driving, and used as an auxiliary means. It is possible.

Therefore, the X- and Y-axis acceleration sensors 120, 130, and 131 become basic components of accident detection, while the Z-axis acceleration sensors 131 and 140 are X- and Y-axis acceleration sensors 120, 130, and 131. After the accident is detected, it is an auxiliary means to determine whether it is the accident or the X / Y axis acceleration change caused by the up / down movement of the vehicle.

Accelerometer sensors 120, 130, 140, and 131 are acceleration sensors widely used in electronic engine control systems, anti-lock braking systems (ABS), intelligent suspension systems, steering systems, and the like. Includes all acceleration sensors.

Although the mechanical acceleration sensor or the silicon acceleration sensor may be used to implement the present invention, the mechanical acceleration sensor has a disadvantage in that the structure is complicated and large and heavy, so that the reliability is somewhat lowered. In view of the above, it is more preferable to implement the silicon accelerometer.

In addition, as a silicon acceleration sensor, a capacitive type made by surface micromachining of poly-silicon, which is easy to form a thin film, and a piezoresistive element formed on a single crystal silicon, and a thin film processed by substrate micromachining, Piezoresistive Type, whichever type is used does not matter.

The acceleration sensors 120, 130, and 140 used in FIG. 1A are single-axis acceleration sensors capable of measuring any one-way acceleration, and the acceleration sensor 131 used in FIG. 1B simultaneously measures two or three directions. It can be a 2-axis or 3-axis accelerometer.

The display unit 150 is a device for displaying whether power is supplied and an operation state (normal operation or data retention state after an accident), and may be used as data by extracting data stored in the memory 170 through an external data connection unit 160. Will be.

The camera 190 may be a still image camera or a video camera.

In the case of a still image camera, the reference of the start point of the operation of the camera 190 is when the jerk value calculated by the acceleration values obtained by the acceleration sensors 120, 130, 140, and 131 is within the set jerk value range. This can be said to be an accident. In case of an accident, one shot is taken, and after a predetermined time, two shots are continuously made and stored in the memory 170.

In the case of a video camera, unlike a still image camera, continuous shooting regardless of the presence of an accident is stored in the memory 170 in a first-in, first-out manner for a certain week, and photographs until a predetermined time (set to a random time) has elapsed during an accident. Video information is stored in the memory 170.

Camera 190 is generally to be able to shoot forward / left / right / back, but in the implementation of the vehicle black box according to the present invention, two cameras to shoot forward / left or right direction at right angles It is important to install in the direction.

Here, whether the X-axis or Y-axis acceleration change and two cameras mounted in the perpendicular direction has a very important meaning in the implementation of the present invention.

Most of the devices of the previously applied vehicle black box are information directly from the vehicle (vehicle speed, time, distance, steering wheel angle, brake strength, engine speed, vehicle video storage device, vehicle route, speed, time) And the like, in the present invention, it is attached to a predetermined position of the vehicle independently without obtaining information from the vehicle, and whether the acceleration change in the longitudinal / lateral direction (X / Y axis direction) or the vertical direction (Z axis direction) of the vehicle is determined. It is a black box device that can measure accidents and store accidents.

In addition, while the prior art proposes two front / rear directions or a large number of in / out directions of the vehicle in the mounting of the camera, one of the key concepts of the present invention is that by placing at least two cameras in a perpendicular direction on a plane, With two pictures taken at the same time from two cameras, it is possible to accurately locate the location of the accident of a vehicle equipped with a black box. In addition, comparing and analyzing the two photographs taken at a predetermined time after the accident and the photographs at the time of the accident, in addition to the direct information recorded in the photographs, it is possible to confirm the behavior of the two vehicles related to the accident immediately before the accident, at the time of the accident, and immediately after the accident. It is possible.

In other words, it is an object of the present invention to realize the practical use with the simplest device without reducing the reliability of accident history analysis as compared to the conventional vehicle black box, the technical idea that corresponds to this problem is the acceleration change value And a black box implemented with a minimum required camera.

Figure 2 shows the attachment position of the camera, in order to implement the present invention requires only two orthogonal cameras 210 and 220 or 230, but the rear camera 240, rear fender left camera 250 and The rear fender right side camera 260 may be further installed to configure more accurate accident analysis.

3 is a diagram illustrating an operation of the vehicle black box of the present invention, and in particular, is an operation diagram based on only the X / Y axis acceleration sensors 120, 130, and 131 which are the basis of an accident determination.

Referring to Figure 3 describes the operation of the vehicle black box of the present invention.

When the power is turned on (S310), the X-axis acceleration sensor 120, the Y-axis acceleration sensor 130 or the XY-axis acceleration sensor 131 reads the acceleration change in the X-axis or Y-axis direction, at this time The obtained acceleration value is subjected to a jerk value calculation by the controller 110 to determine whether the jerk value falls within the preset jerk value range (S320).

If the calculated jerk value (both in the X-axis or Y-axis direction) is not within the set jerk value range, the X-axis and Y-axis acceleration data are recorded first-in-first-out according to the preset period, and the video camera is attached. If so, the video data is also recorded (S330), and fed back to step S320 again.

If the calculated jerk value (any of the X-axis or Y-axis direction jerk value) falls within the set jerk value range, then the X-axis and Y-axis acceleration data recorded by first-in first-out method recognized as an accident and constant from then on Data up to the elapsed period is recorded.In this case, if a still image camera is attached, one still image shooting at the time of an accident and two shots after a predetermined time elapses after one shooting are taken. After shooting the video to record a predetermined time after the accident (S340). After S340, all data recording is stopped (S350).

The accident process is simulated based on the data recorded in this manner, with reference to FIGS. 4 to 10.

Data underlying the simulation described below will be described only the process of interpreting the thinking as the simplest basic data in accordance with the spirit of the present invention. 4 to 8 are data recorded with or without acceleration by an acceleration sensor without a camera, and FIGS. 9 and 10 are data of two still images and two left photographs by the photographing operation according to the acceleration change.

In this case, the simulation is performed using only the acceleration change or the still image, but it is also natural to use both the acceleration change and the still image or the video to increase the reliability of the accident judgment.

[Acceleration by Accelerometer With or without  Simulation based on data

Referring to FIG. 4, a scenario in which a black box-equipped vehicle 410 enters a crossroad by driving at a constant speed is found to be a relative vehicle 420 entering from the left side, and after the vehicle stops, a virtual scenario is encountered.

At this time, (a) is the site state at the time of the accident, (b) is the result recorded by the X-axis (longitudinal) acceleration sensor, and (c) is the result recorded by the Y-axis (lateral) acceleration sensor Chi.

Looking at the acceleration change in the X-axis direction (longitudinal direction) with reference to (b), the vehicle equipped with a black box 410 is a constant speed driving (A / B / C / D) / deceleration (E) / stop (F) / external shock It can be seen that the operation of this unit was stopped in the (G) / stopped (H) state. Here, when the acceleration change value represents a fine vibration based on the median value such as A / B / C / D, it can be seen that the vehicle is at a constant speed.

Looking at the acceleration change in the Y-axis (lateral direction) with reference to (c), the vehicle equipped with a black box 410 is a straight run or stop (A) / accident detection (B) / after a certain time operation stop (C) I can see that there was.

That is, when considering the result graph and the accident scene of (b) and (c) above, it can be seen that the vehicle equipped with the black box 410 is decelerated after driving and has been hit by the relative vehicle 420 while the vehicle is stopped.

In addition, since the stop section such as F of (b) is output immediately before the collision by the Y-axis acceleration sensor, the vehicle equipped with the black box 410 is applied as the collision occurs in progress, thus the ground for the vehicle to insist is lost. .

Referring to FIG. 5, a scenario in which the relative vehicle 520 collides with the black box-equipped vehicle 510 waiting for a signal at a crossroad from the rear is shown.

At this time, (a) is the site state at the time of the accident, (b) is the result recorded by the X-axis (longitudinal) acceleration sensor, and (c) is the result recorded by the Y-axis (lateral) acceleration sensor Chi.

Referring to (b) with reference to the X-axis (longitudinal) acceleration change, the vehicle equipped with a black box 510 is a constant speed (A / B / C) / deceleration (D) / stop (E) / external shock (F) It can be seen that there was a stop in the stop (G) state.

Looking at the change in acceleration in the Y-axis (lateral direction) with reference to (c), it can be seen that the vehicle equipped with the black box 510 has an operation stop (B) after a straight run or a certain time after the stop (A) / accident detection. have.

That is, when considering the result graph and the accident scene of the above (b) and (c), it can be seen that the vehicle equipped with the black box 510 decelerates after driving and has been hit by the rear vehicle by the relative vehicle 520 while the signal is stopped. .

In addition, since the graph as shown in (c) is output by the Y-axis acceleration sensor (the Y-axis direction (lateral direction), that is, no acceleration change in the left and right directions of the vehicle), the vehicle equipped with the black box is interrupted and the rear collision occurs. This will cause the vehicle to claim no evidence.

Referring to FIG. 6, it is a virtual scenario when a relative vehicle 620 is interrupted in front of a vehicle equipped with a black box while driving, and a black box equipped vehicle is suddenly braked.

At this time, (a) is the site state at the time of the accident, (b) is the result recorded by the X-axis (longitudinal) acceleration sensor, and (c) is the result recorded by the Y-axis (lateral) acceleration sensor Chi.

Referring to (b) with reference to the X-axis (longitudinal) acceleration change, the vehicle equipped with a black box 610 is a constant speed (A / B / C / D) / deceleration (E / F) / external shock (G) / It can be seen that there was an operation stop in the stop (H) state.

Referring to (c) of the Y-axis (lateral direction) acceleration change, the vehicle equipped with a black box 610 is a right steering (A) / left steering (B) / driving straight or stop (C) / accident detection time It can be seen that there has been an operation stop (D).

That is, when considering the result graph and the accident scene of (b) and (c) above, it can be seen that the vehicle equipped with the black box 610 has collided with the relative vehicle 620 in the front during the sudden braking process. Here, the Y-axis (lateral) graph result (c) contains the fact that the vehicle equipped with the black box 610 is driving right / left / straight (including stops) before the accident.

Therefore, since the graph as shown in (b) is outputted by the X-axis acceleration sensor, it can be seen that the objection that the vehicle crashed without braking without seeing the intervening vehicle is not established.

Referring to FIG. 7, it is a hypothetical scenario of a traffic accident dispute in which one vehicle of two vehicles invading invades the center line and it is difficult to determine which vehicle invades the center line after the collision occurs. One of them is a black box-equipped vehicle 710.

At this time, (a) is the site state at the time of the accident, (b) is the result recorded by the X-axis (longitudinal) acceleration sensor, and (c) is the result recorded by the Y-axis (lateral) acceleration sensor Chi.

Looking at the acceleration change in the X-axis direction (longitudinal direction) with reference to (b), the vehicle equipped with a black box 710 is a constant speed (A / B / C / D / E / F) / deceleration (G) / external shock (H It can be seen that there is an operation stop in the) / stop (I) state.

Referring to (c) with reference to the Y-axis (lateral) acceleration change, the vehicle equipped with a black box 710 has a gentle right steering (A) / gentle left steering (B) / straight (C) / sudden right steering ( D) / Accident Detection It can be seen that there was an operation stop (E) after a certain time.

That is, when considering the result graph and the accident scene of (b) and (c) above, the black box-equipped vehicle 710 steers rightward while steered immediately before the crash after driving straight through a large left turn curve followed by a large left turn curve. It can be seen that the collision.

Therefore, the Y-axis (lateral) graph result (c) indicates that the vehicle equipped with the black box 710 has passed a large curve road in the structure of the road before the accident, so that the vehicle facing the center line through the straight line in the opposite direction is invaded. It can be seen that the objection to the conflict does not hold.

Referring to FIG. 8, in the process of avoiding the relative vehicle 1 820 in which the black box-equipped vehicle 810a has invaded the center line in the advancing direction, the vehicle 810a and the second vehicle facing the center line invade after the first collision. It is a virtual scenario of the black box-equipped vehicle 810b in the case of a collision. Relative vehicle 1 820, which provided the cause of the first collision, escapes after an accident, and the black box-equipped vehicle 810 is inevitably mistaken as an assailant who invaded the center line.

At this time, (a) is the site state at the time of the accident, (b) is the result recorded by the X-axis (longitudinal) acceleration sensor, (c) is recorded by the Y-axis (lateral) acceleration sensor Result.

Referring to (b) with reference to the X-axis (longitudinal) acceleration change, the vehicle equipped with a black box (810a, 810b) is a constant speed (A / B / C) / deceleration (D) / external shock (E) / deceleration ( F) / 2 It can be seen that there was a stop in the state of external shock (G) / stop (H).

Referring to (c) with respect to the Y-axis (lateral) acceleration change, the black box-equipped vehicles 810a and 810b have a smooth left steering (A) / straight (B) / left steering (C) / sudden steering ( D) / Accident Detection It can be seen that there was an operation stop (E) after a certain time.

That is, when considering the result graphs of (b) and (c) above, the black box-equipped vehicles 810a and 810b cross the large left turn curve road and drive straight ahead and collide with the relative vehicle 1 820 while steered immediately before the collision. It can be seen that the vehicle collided with the second vehicle 830 after the collision.

Therefore, it can be seen that the objection that the black box-equipped vehicles 810a and 810b invaded the centerline by mistake without causing a primary collision is not established.

The five scenarios exemplified above are exemplary explanations of how to apply the acceleration change data recorded by the vehicle black box according to the present invention. Highly reliable information can be obtained.

That is, the vehicle black box having a very simple structure can be provided so that only the most basic information necessary for the analysis of the accident situation in consideration of the accident site can be provided, thereby realizing the practical use of a low-cost vehicle black box.

[Simulation Based on the Shooting Data by Still Image Camera According to Acceleration Change]

Referring to FIG. 9, (a) is an accident scene, (b) is a result of recording the front photo 930a and the left photo 930b at the time of the collision, and (c) the front photo 940a and immediately after the collision. Left picture 940b is the recording result.

The collision location and collision of the black box-equipped vehicle in a situation where the relative vehicle 920, which enters the black box-equipped vehicle 910 that has traveled three-way in a different direction, collides, and the relative vehicle insists that it is a contact accident that occurred during the road trip. City vehicle direction is a hypothetical scenario in which accidents are important grounds for investigation.

At this time, the two front pictures 930a and the left pictures 930b in the right direction recorded in (b) are connected to the accident site of (a), and the position of the vehicle fitted with the black box at the time of the accident is the same as (d). It is possible to easily identify the accident, so that the incident may be identified.

Referring to FIG. 10, (a) is the accident scene, (b) is the result of recording the front photo 1030a and the left photo 1030b at the time of the collision, and (c) the front photo 1040a immediately after the collision and The result of the left photograph 1040b is recorded.

The vehicle in front of the black box vehicle 1010 waiting for a signal at three distances, the vehicle 1020 forcibly cuts into the front of the black box vehicle. It is a hypothetical scenario in which a contact accident occurs during a lane change without seeing it.

At this time, two forward photographs 1030a and left photograph 1030b at the time of the accident recorded in (b) and the front photographs 1040a and left photograph 1040b recorded immediately after the collision recorded in (c) are recorded. In comparison, in the picture of 1030a, the vehicle equipped with the black box is parallel to the lane, and the relative vehicle in front of the vehicle is photographed at an oblique angle with the lane in front of the vehicle. Will disappear.

On the other hand, when comparing the left side pictures (1030b / 1040b) of the two viewpoints, since the surrounding buildings are in the same position in the two pictures, it can be seen that the vehicle equipped with the black box was accidented by the relative vehicle while stopping without moving the position.

On the other hand, the relative speed with the black box-mounted vehicle when the relative vehicle intervenes as the movement amount of the relative vehicle in the front photograph 1030a and the front photograph 1040a immediately after the accident is also a basis for judging. In addition, additional information, such as traffic light situation, surrounding vehicles, or walking witnesses, may be used depending on the situation.

The two scenarios described above are exemplary explanations of how to apply still image data recorded by the vehicle black box according to the present invention, and even in only two cases, very high reliability in interpreting the accident situation when combined with the accident site at the time of an accident It can be seen that information can be obtained.

Although the black box using the camera is preferably used as an auxiliary function for the black box using the data of the acceleration change, the vehicle has a very simple structure so that the camera image data can acquire only the most basic information necessary for the analysis of the accident situation considering the accident scene. It will be able to provide a black box.

Although the preferred embodiments of the present invention have been described above with reference to the accompanying drawings, the above-described technical configuration of the present invention may be embodied by those skilled in the art to which the present invention pertains without changing its technical spirit or essential features of the present invention. It will be appreciated that the present invention may be practiced as. Therefore, the above-described embodiments are to be understood as illustrative and not restrictive in all respects, and the scope of the present invention is indicated by the appended claims rather than the detailed description, and the meaning and scope of the claims and All changes or modifications derived from the equivalent concept should be interpreted as being included in the scope of the present invention.

According to the configuration of the present invention described above, it is possible to provide a vehicle black box that can achieve the accuracy of the accident analysis with only the change data of the acceleration in the longitudinal direction / transverse direction (X axis / Y axis).

In addition, it is possible to provide a vehicle black box that can provide an auxiliary data for analyzing the accident situation by adding a camera of a simple structure.

In addition, even with only the basic data described above, it is possible to increase the reliability of the accident history analysis, thereby realizing the popular practical use of the vehicle black box.

Claims (7)

An X-axis acceleration sensor for reading the acceleration value in the X-axis direction; A Y-axis acceleration sensor perpendicular to the X-axis acceleration sensor and reading an acceleration value in the Y-axis direction; Based on the acceleration read from the X-axis or Y-axis acceleration sensor, a value of X-axis or Y-axis jerk (Jerk = da / dt, da is acceleration change amount, dt is time change amount) is obtained, and X is obtained. A control unit for detecting an accident by determining whether the axial direction or the Y-axis direction jerk value is within a set jerk value range; And a memory configured to store the acceleration value in the X-axis direction or the Y-axis direction for a predetermined time before and after the accident, if it is determined by the controller. The X-axis acceleration sensor and the Y-axis acceleration sensor is embedded in a certain enclosure attached to a predetermined position of the vehicle, and operate independently of the electrical and electronic devices included in the vehicle, Only the acceleration value in the X-axis direction or the Y-axis direction stored in the memory is used as a factor for deriving the accident history of the accident vehicle. The method of claim 1, A vehicle black box that further includes a Z-axis acceleration sensor that reads the acceleration value in the Z-axis direction and is used as an auxiliary means of accident determination. delete delete The method of claim 1, The vehicle black box further includes a camera for capturing an image when it is determined by the controller to be an accident. The method of claim 5, The camera is a still image camera, the still image camera and the first camera for omnidirectional shooting; It includes a second camera for shooting in the left or right direction formed at right angles to the first camera, When it is determined by the controller that the accident, the still image camera is the first to shoot at the time of the accident determination, and after the predetermined time after the first shooting, the second black box for the vehicle. The method of claim 5, The camera is a video camera, The video camera includes a first camera for omnidirectional photographing; It includes a second camera for shooting in the left or right direction formed at right angles to the first camera, The video camera is stored in the memory in a first-in, first-out manner after the continuous shooting from the accident, and after the additional time is stored in the memory from the time of the determination to the predetermined time elapsed after shooting, the vehicle black box.

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