KR100776541B1 - Black Box for Vehicle - Google Patents

Abstract

The present invention relates to a vehicle black box, and more particularly to a vehicle black box made of a very simple simple structure.

A vehicle black box according to the present invention includes: longitudinal acceleration change detection means for reading a longitudinal acceleration change as a preset point value; And lateral acceleration change detection means for reading the lateral acceleration change as a predetermined point value.

The longitudinal and transverse acceleration change detection means may include: a pendulum having a predetermined weight, rotating about a rotation axis, and having a contact switch at a predetermined position; Acceleration position sensing plate formed by alternating the energizing plate and the insulating plate in order to be on-off with the contact switch of the pendulum; including, the longitudinal / transverse acceleration change output by the longitudinal / transverse acceleration change detection means It is characterized in that the accident history of the accident vehicle can be derived.

According to such a configuration, it is possible to use as a basic data of the accident process that can analyze the accident situation by matching the accident scene at the time of the accident with simple data of only the change in the acceleration / deceleration in the longitudinal direction and the lateral direction.

Longitudinal acceleration change detection means, lateral acceleration change detection means, inertia, restoring force

Description

Black Box for Vehicle

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

FIG. 2 schematically illustrates a first embodiment of the longitudinal / lateral acceleration change detection means to explain the concept of the longitudinal / lateral acceleration change detection means shown in FIG. Is an example of a means of detecting an acceleration change by

FIG. 3 schematically illustrates a second embodiment of the longitudinal / lateral acceleration change detection means to explain the concept of the longitudinal / lateral acceleration change detection means shown in FIG. 1,

FIG. 4 schematically illustrates a third embodiment of the longitudinal / lateral acceleration change detection means to explain the concept of the longitudinal / lateral acceleration change detection means shown in FIG. 1;

5 is a flowchart illustrating the operation of the vehicle black box according to the present invention;

6 to 10 are diagrams for explaining an example of analyzing an accident situation based on data stored in a vehicle black box according to the present invention.

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

 110, 210, 310, 410: control unit 120: longitudinal acceleration change detection means

 130: transverse acceleration change detection means 140: display unit

 150: power 160: memory

 170: external data connection 220, 320, 420: mass

 230, 330, 430: acceleration position detecting plate 240, 340, 440: energizing rod

 350, 450: elastomer 360: damper

The present invention relates to a vehicle black box, and more particularly to a vehicle black box made of a very simple simple structure.

Recently, the technology for various vehicle black boxes has been developed or patented.

Most of the vehicle black boxes that have been filed so far are digital driving recorders that periodically record the speed, time, and distance of the vehicle, or drive recorder devices that store information such as steering wheel angle, brake strength, and engine speed. Vehicle driving path tracking device that detects and stores the moving route, speed, time, etc. through vehicle video storage device or GPS system that compresses / stores video and audio data inside and outside the vehicle or vehicle theft, fire, traffic information, emergency Telematics technology to perform emergency 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.

Recently, the Republic of Korea Patent Publication No. 10-0503303 proposed to solve this problem has been disclosed.

(여기에서, ω는 차량의 요레이트, ΔG는 제1/제2 종가속도 감지 수단의 검출 가속도의 차, R은 제1/제2 종가속도 감지 수단 사이의 거리)에 대입하여 차량의 요레이트를 산출하는 것을 특징으로 한다.The vehicular black box device disclosed in Korean Patent No. 10-0503303 includes: a first longitudinal acceleration detecting means for detecting a first longitudinal acceleration of a vehicle; Second longitudinal acceleration detecting means for sensing a second longitudinal acceleration of the vehicle; Lateral acceleration sensing means for sensing the lateral acceleration of the vehicle; Braking detection means; Vehicle speed sensing means; The first and second longitudinal acceleration

(Where ω is the yaw rate of the vehicle, ΔG is the difference in the detected acceleration of the first / second longitudinal acceleration sensing means, R is the distance between the first / second longitudinal acceleration sensing means) It is characterized by calculating.

Such a vehicle black box device disclosed in Korean Patent Publication No. 10-0503303 considerably simplified its structure than a conventional vehicle black box in that it uses a longitudinal acceleration sensing means and a lateral acceleration sensing means irrelevant to vehicle information. .

However, the vehicle black box device disclosed in Korean Patent Publication No. 10-0503303 still receives information from the vehicle braking detecting means and vehicle speed detecting means (receiving basic information from the vehicle), longitudinal acceleration detecting means and transverse direction. Since the data calculated by the acceleration sensing means requires the exact physical quantity of acceleration, the vertical / lateral acceleration sensing means still has a complicated structure, and it is configured to use the information obtained from the vertical / lateral acceleration sensing means for yaw rate calculation. In addition, since the formula is added separately, the vehicle black box is still difficult to be commercialized.

An object of the present invention for solving the above problems is to provide a very simple vehicle black box that can be utilized as a black box by measuring only the change in the deceleration in the longitudinal / transverse direction.

Another object of the present invention is to realize the practical use of a vehicle black box by providing a simple vehicle black box.

It is still another object of the present invention to use as an accident process basic data capable of interpreting an accident process by matching an accident scene with an accident with simple data of only the change in acceleration / deceleration in the longitudinal direction / transverse direction.

A vehicle black box according to the present invention for solving the above problems includes a longitudinal acceleration change detection means for reading the longitudinal acceleration change as a predetermined point value; Accidental vehicle accident comprising a lateral acceleration change detection means for reading the lateral acceleration change as a predetermined point value, and only by the relative value of the longitudinal / lateral acceleration displacement output by the longitudinal / lateral acceleration change detection means It is characterized by being able to derive theodolite.

Here, the longitudinal acceleration change detection means and the lateral acceleration change detection means, the mass (Mass) having a predetermined weight; An elastic body connected to one side of the mass and linearly moving due to elasticity; A damper connected to the other side of the mass to absorb an impact caused by vibration of the mass; A conducting rod formed on an upper side or a lower side of the mass; It is characterized in that the device using the elastic body comprising a; acceleration position detecting plate formed by alternately insulated plate and the conductive plate to be turned on and off the conducting rod.

Here, the elastic body and the acceleration position detecting plate is preferably configured to be electrically connected to the control unit.

The longitudinal acceleration change detection means and the transverse acceleration change detection means may include: a pendulum having a predetermined weight, rotating about a rotation axis, and having a contact switch at a predetermined position; It is characterized in that the device using a pendulum comprising a; acceleration position detecting plate formed by alternately insulated and conductive parts in order to turn on and off the contact switch of the pendulum.

Here, the rotation axis of the pendulum and the acceleration position sensing plate is preferably configured to be electrically connected to the control unit.

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

1 shows an internal block diagram of a black box for a vehicle according to the present invention.

As shown, the vehicle black box according to the present invention is a control unit 110, longitudinal / transverse acceleration change detection means (120, 130), display unit 140, power supply 150, memory 160, and external And a data connection unit 170.

Here, the display unit 140 is a device for displaying the power supply and the operating state of the device (normal operation or data retention state after an accident).

The longitudinal acceleration change detection unit 120 and the lateral acceleration change detection unit 130 are devices for measuring acceleration changes in the longitudinal and transverse directions of the vehicle, and independently of the vehicle without obtaining any information directly from the vehicle. Only the acceleration in the longitudinal and transverse directions is measured.

Here, the meaning of the longitudinal / lateral acceleration change has a very important meaning in the implementation of the present invention.

In other words, the devices of the conventionally applied vehicle black box are the information of the vehicle movement path through the information (vehicle speed, time, distance, steering wheel angle, brake strength, engine speed, vehicle video storage device, GPS system) directly from the vehicle. , Speed, time, etc.), in the present invention, it is attached to a predetermined position of the vehicle independently without obtaining information from the vehicle to measure only the longitudinal / lateral acceleration change of the vehicle.

The longitudinal and lateral acceleration changes of the vehicle provide an objective basis for accurately inferring the accident situation when associated with the road structure and the accident site. Description of this will be described in more detail with reference to FIGS. 6 to 10.

In addition, the vehicular black box device disclosed in Korean Patent Publication No. 10-0503303 also uses longitudinal acceleration detection means, lateral acceleration detection means, and yaw rate calculation equations unrelated to vehicle information. The acceleration detection means disclosed in -0503303 can obtain the yaw rate only by reading the quantitative data values of the longitudinal and lateral accelerations, and the internal configuration for calculating the quantitative data values requires more precision. However, the longitudinal / lateral acceleration change (amount) used in the present invention is not a quantitative acceleration change value, i.e., a change in acceleration in the longitudinal direction (before and after the vehicle) and the lateral direction (the vehicle left and right). By only earning a bay, a car black box can be greatly simplified.

The longitudinal / lateral acceleration change detection means 120 and 130 read the acceleration change in the longitudinal / lateral direction of the vehicle for each unit time, and this data is stored in the memory 160 by a first-in, first-out method. The stored data stops storing additional data after recognizing it as an accident when the acceleration change per unit time is greater than a predetermined value, and is based on reading the data from an external additional device through the external data connection unit 170 to analyze the path of the vehicle during the accident analysis. It is used as data.

Here, the longitudinal acceleration change detection means 120 is installed in the same direction as the vehicle, the horizontal acceleration change detection means 130 is installed to be perpendicular to the longitudinal acceleration change detection means 120, the internal configuration Is the same. The internal configuration of the longitudinal acceleration change detection means 120 and the transverse acceleration change detection means 130 will be described with reference to FIGS. 2 to 4.

FIG. 2 schematically illustrates a first embodiment of the longitudinal / lateral acceleration change detection means to explain the concept of the longitudinal / lateral acceleration change detection means shown in FIG. 1.

As shown, the acceleration change detection means 120, 130 according to the first embodiment of the present invention is a device applying the principle of the pendulum, the pendulum 220, the acceleration change position plate 230 and the energizing rod 240 )

The pendulum 220 is moved around the axis of rotation according to the change in acceleration, the pendulum 220 is provided with a conducting rod 240 is moved along the acceleration change position plate 230.

The acceleration change position plate 230 is provided with an alternating current conducting plate 230a and an insulating plate 230b, and is energized by the energizing rod 240 and the energizing plate 230a of the pendulum 220, and then the value at that time. Will print.

The center (reference point) of the acceleration position detecting plate 230 is set to 6 for convenience of explanation, and 1 to 5 and 7 to 11 conducting plates 230a are formed to the left and right. In addition, only the current carrying plates 4 to 5 and 7 to 8 at the center are densely constructed in consideration of the convenience of analysis and the cost of the present invention in the event of a vehicle accident.

In the case of the longitudinal acceleration change detection means 110 means that there is an acceleration change in the front / rear direction of the vehicle when the energizing plate 230a and the energizing rod 240 of 1 to 5 and 7 to 11 are energized. In the case of the lateral acceleration change detection means 120, it means that there is an acceleration change in the left / right direction of the vehicle when the energizing plates 230a and the energizing rods 240 of 1 to 5 and 7 to 11 are energized. do.

FIG. 3 schematically illustrates a second embodiment of the longitudinal / lateral acceleration change detection means to explain the concept of the longitudinal / lateral acceleration change detection means shown in FIG. 1.

As shown, the longitudinal / lateral acceleration change detection means 120, 130 according to the second embodiment of the present invention is a mass (320), the acceleration position sensing plate 330, the energizing rod 340, the elastic body And a damper 360. Here, the configuration including the mass 320 and the acceleration position detecting plate 330 is referred to as a slider.

Acceleration change detection means (120, 130) according to the second embodiment of the present invention is a device applying the inertia and elastic body restoring force, the principle is the same as the first embodiment of Figure 2, but the information by the vibration of the vehicle up and down the pendulum It is an alternative to prevent the error, and has a structure in which the damper 360 is installed to prevent an error due to vibration of the elastic body.

The acceleration position detecting plate 330 is formed by alternately forming a conductive plate 330a made of a conductive material and an insulating plate 330b made of an insulating material.

The center (reference point) of the acceleration position detecting plate 330 is set to 6 for convenience of explanation, and the conducting plates 330a of 1 to 5 and 7 to 11 are formed to the left and right. In addition, only the current carrying plates 4 to 5 and 7 to 8 at the center are densely constructed in consideration of the convenience of analysis and the cost of the present invention in the event of a vehicle accident.

Similarly to the first embodiment, in the case of the longitudinal acceleration change detecting means 110, when the energizing plates 330a and the energizing rods 340 of 1 to 5 and 7 to 11 are energized, acceleration in the front / rear direction of the vehicle is performed. In the case of the lateral acceleration change detection means 120, when the energizing plate 330a and the energizing rod 340 of 1 to 5 and 7 to 11 are energized, the vehicle moves in the left / right direction of the vehicle. This means that there is an acceleration change.

Here, the change in acceleration is made by the restoring force and the inertia force of the elastic body 350, and the result of the acceleration change is read by the energization of the energizing rod 340 and the acceleration position detecting plate 330 of the mass 320 connected to the elastic body. To me.

FIG. 4 schematically illustrates a third embodiment of the longitudinal / lateral acceleration change detection means to explain the concept of the longitudinal / lateral acceleration change detection means shown in FIG. 1.

As shown, the longitudinal / lateral acceleration change detection means 120, 130 according to the third embodiment of the present invention is a mass (420), acceleration position sensing plate 430, energizing rod 440, elastic body Each 450 is formed in a symmetrical structure. Here, a configuration including the mass 420 and the acceleration position detecting plate 430 is referred to as a first slider, and a portion symmetrical with the first slider is referred to as a second slider.

The principle is the same as that of the second embodiment of FIG. 3, but has a structure in which a second slider is added instead of the damper 360 to prevent an error due to vibration of the elastic body.

That is, the movement of the elastic member 450 of the first slider in the tensile direction is restrained, and in the tensile direction, the same kind of sensing means is added in the symmetrical direction.

According to this structure, the longitudinal / lateral acceleration change detection is detected by the first slider in case of acceleration change, by the second slider in case of deceleration change, or vice versa by the second slider in case of acceleration change. In the case of the deceleration change, the second slider detects the change of the data, thereby ensuring the reliability of the data.

Although the first to third embodiments of the acceleration change detection means 110 and 120 according to the present invention described above have been described for simplicity, the spirit of the present invention is not limited thereto. .

FIG. 5 is a flowchart illustrating the operation of a vehicle black box according to the present invention. In accordance with the presence or absence of a threshold acceleration change per unit time, when there is a change, the data stored up to now is stored, and when there is no change, the vertical / lateral acceleration change is shown. Record the point value and check again with or without threshold acceleration change per unit time.

6 to 10 are diagrams for explaining an example of analyzing an accident situation based on data stored in a vehicle black box according to the present invention.

Referring to FIG. 6, a scenario in which a black box-equipped vehicle 610 entering a crossroad while driving at a constant speed is found to have a relative vehicle 620 entering from a left side, and after the vehicle stops, the vehicle is hit by a relative vehicle.

At this time, (a) is the site state at the time of the accident, (b) is the result value recorded by the longitudinal acceleration change detection means, (c) is the result value recorded by the lateral acceleration change detection means.

Looking at the longitudinal acceleration change with reference to (b), the vehicle equipped with a black box 610 operates the device by constant speed driving (A / B / C / D) / deceleration (E) / stop (F) / external shock It can be seen that there was a stop (G). Here, if the acceleration change point value represents a fine vibration based on the median value such as A / B / C / D, it can be seen that it is a constant speed drive.

Looking at the lateral acceleration change with reference to (c), it can be seen that the vehicle equipped with a black box 610 has the operation stop (B) of the device due to the straight running or stop (A) / external impact.

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 is decelerated after driving and has been hit by the relative vehicle 620 during the stop.

In addition, since the stop section such as F of (b) is output immediately before the collision by the longitudinal acceleration change detection means, the vehicle equipped with the black box 610 is applied as a collision occurred in progress so that the ground for the vehicle to insist is lost. do.

Referring to FIG. 7, it is a virtual scenario when the relative vehicle 720 collides with the black box-equipped vehicle 710 waiting for a signal at a crossroad from the rear.

At this time, (a) is the site state at the time of the accident, (b) is the result value recorded by the longitudinal acceleration change detection means, (c) is the result value recorded by the lateral acceleration change detection means.

Looking at the longitudinal acceleration change with reference to (b), the vehicle equipped with a black box 710 is a stop (D) of the device due to the constant speed (A) / deceleration (B) / stop (C) / external shock (D) Able to know.

Looking at the lateral acceleration change with reference to (c), it can be seen that the vehicle equipped with a black box 710 had a stop operation (B) of the device due to a straight run or a stop (A) / external impact.

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 710 is decelerated after driving and has been hit by the rear vehicle by the relative vehicle 720 while the signal is stopped. .

In addition, since the graph as shown in (c) is output by the lateral acceleration change detection means (no acceleration change in the lateral direction, that is, the left and right direction of the vehicle), the black box-equipped vehicle 710 is interrupted and a rear collision occurs. There is no basis for the vehicle to claim.

Referring to FIG. 8, a virtual scenario in which a relative vehicle 820 intervenes in front of a vehicle equipped with a black box and suddenly brakes the vehicle equipped with a black box while driving, may cause a collision.

At this time, (a) is the site state at the time of the accident, (b) is the result value recorded by the longitudinal acceleration change detection means, (c) is the result value recorded by the lateral acceleration change detection means.

Looking at the longitudinal acceleration change with reference to (b), the vehicle equipped with a black box 810 is the device operation stop due to the constant speed (A / B / C / D) / deceleration (E / F) / external shock (G) You can see that there was.

Looking at the lateral acceleration change with reference to (c), the vehicle equipped with a black box 810 is the right operation (A) / left steering (B) / driving straight or stop (C) / external impact due to external shock ( D) can be seen 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 810 collided with the relative vehicle 820 in front of the rapid braking process after the constant speed driving. Here, the results of the lateral graph (c) indicates that the vehicle equipped with the black box 810 is a right turn / left turn / going (including a stop) driving before the accident but is not related to the accident.

Therefore, the graph as shown in (b) is output by the longitudinal acceleration change detection means (confirmation of sudden braking because the deceleration change is formed in two stages in succession). I can see that it does not.

Referring to FIG. 9, it is a hypothetical scenario of a traffic accident dispute in which one of two vehicles in a road invades the center line and it is difficult to determine which vehicle invades the center line only after the collision occurs. One vehicle among them is the black box-equipped vehicle 910.

At this time, (a) is the site state at the time of the accident, (b) is the result value recorded by the longitudinal acceleration change detection means, (c) is the result value recorded by the lateral acceleration change detection means.

Looking at the longitudinal acceleration change with reference to (b), the vehicle equipped with a black box 910 is the operation of the unit by the constant speed (A / B / C / D / E / F) / deceleration (G) / external impact ( It can be seen that there was H).

Looking at the lateral acceleration change with reference to (c), the vehicle equipped with a black box 910 is a pattern by the straight (A) / gentle left steering (B) / straight (C) / steep steering (D) / external impact It can be seen that there has been a device shutdown (E).

That is, when considering the result graph and the accident site of (b) and (c) above, it is understood that the vehicle equipped with the black box 910 collided during the steer steering to the right while braking immediately after the collision after driving straight through a large left turn curve. Can be.

Therefore, the result of the horizontal graph (c) indicates that the black box-equipped vehicle 910 had passed the large curve road due to the structure of the road before the accident, and thus, collided with the oncoming vehicle through the straight line in the opposite direction. I can see that it is not.

Referring to FIG. 10, in a process of avoiding the relative vehicle 1 1020 in which the black box-equipped vehicle 1010 invades the center line in the direction of travel, the vehicle 1010 and the second vehicle 1010 that face each other invade the center line after the first collision. A hypothetical scenario in case of a collision. Relative vehicle 1 1020, which provided the cause of the first collision, escapes after an accident, and the black box-equipped vehicle 1010 is inevitably mistaken as the perpetrator who intruded the center line with a mistake.

At this time, (a) is the site state at the time of the accident, (b) is the result value recorded by the longitudinal acceleration change detection means, (c) is the result value recorded by the lateral acceleration change detection means.

Looking at the longitudinal acceleration change with reference to (b), it can be seen that the vehicle 1010 equipped with a black box had a stop (E) of the device due to the constant speed (A / B / C) / deceleration (D) / external impact. Can be.

Looking at the lateral acceleration change with reference to (c), it can be seen that the vehicle 1010 equipped with the black box had the operation stop (C) of the device due to external impact during left steering (A) / straight (B) / left steering. Can be.

That is, when considering the result graphs of (b) and (c) above, the vehicle equipped with the black box 1010 collides with the relative vehicle 1 (1020) while performing a rapid braking and left steering immediately before the collision after driving straight through a large left turn curve. It can be seen that. Considering the scene of the incident, it can be judged that after the left steering, the centerline collided with the second vehicle 1030 invading.

Therefore, if the vehicle equipped with the black box 1010 invades the center line and collides with the oncoming vehicle 1030, the left steering should be maintained for a certain time on the graph (C), but since the collision occurred simultaneously with the left steering, the black box vehicle ( It can be seen that the objection that 1010) invaded the central line without error was not established.

The five scenarios exemplified above are exemplary descriptions of how to apply the result data recorded by the vehicle black box according to the present invention, and in only five cases, very high reliability in interpreting the accident situation when combined with the accident site at the time of the accident You can get that information.

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.

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 exemplary embodiments described above are to be understood as illustrative and not restrictive in all respects, and the scope of the present invention is indicated by the following 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 becomes possible to provide a very simple vehicle black box that can be utilized as a black box by measuring only the change in the acceleration / deceleration in the longitudinal / lateral direction.

In addition, by providing a simple vehicle black box, it becomes possible to realize the practical use of the vehicle black box.

In addition, it is possible to use as a basic data of accident history that can analyze the accident situation by matching the accident scene at the time of accident with simple data of only the change of the acceleration / deceleration in the longitudinal direction and the lateral direction.

In addition, it is possible to reduce unpleasant victims in automobile disputes and reduce social costs for resolving disputes due to the commercialization of a low-cost black box that can be used as scientific evidence to solve automobile accident disputes using only simple longitudinal / lateral deceleration change data. It has an effect.

Claims (7)

Longitudinal acceleration change detection means for reading the longitudinal acceleration change as a predetermined point value; And lateral acceleration change detection means for reading the lateral acceleration change as a predetermined point value. The longitudinal and transverse acceleration change detection means includes: a pendulum having a predetermined weight, rotating about a rotation axis, and having a contact switch at a predetermined position; Including an acceleration position sensing plate formed by alternating the energizing plate and the insulating plate in order to be on-off with the contact switch of the pendulum; A vehicle black box capable of deriving an accident situation of an accident vehicle based on whether the longitudinal / lateral acceleration change is output by the longitudinal / lateral acceleration change detection means. The method of claim 1, The rotating shaft of the pendulum and the acceleration position detecting plate is electrically connected to the control unit, the vehicle black box. delete Longitudinal acceleration change detection means for reading the longitudinal acceleration change as a predetermined point value; And lateral acceleration change detection means for reading the lateral acceleration change as a predetermined point value. The longitudinal and lateral acceleration change detection means, the slider comprising a mass (Mass) having a predetermined weight and an elastic body connected to one side of the mass to perform a linear movement by elasticity; A damper connected to the other side of the mass to absorb an impact caused by vibration of the mass; A conducting rod formed on an upper side or a lower side of the mass; Including an acceleration position sensing plate formed by alternating the energizing plate and the insulating plate in order to be on-off with the energizing rod; A vehicle black box capable of deriving an accident situation of an accident vehicle based on whether the longitudinal / lateral acceleration change is output by the longitudinal / lateral acceleration change detection means. The method of claim 4, wherein The slider and the acceleration position detecting plate is electrically connected to the control unit, the vehicle black box. Longitudinal acceleration change detection means for reading the longitudinal acceleration change as a predetermined point value; And lateral acceleration change detection means for reading the lateral acceleration change as a predetermined point value. The longitudinal and lateral acceleration change detection means, the first slider comprising a mass (Mass) having a predetermined weight and an elastic body connected to one side of the mass to perform a linear movement by elasticity; A second slider formed in a symmetrical structure with the first slider; A conducting rod formed on an upper side or a lower side of the mass; Including an acceleration position sensing plate formed by alternating the energizing plate and the insulating plate in order to be on-off with the energizing rod; A vehicle black box capable of deriving an accident situation of an accident vehicle based on whether the longitudinal / lateral acceleration change is output by the longitudinal / lateral acceleration change detection means. The method of claim 6, And the first and second sliders and the acceleration change position plate are electrically connected to a control unit.

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