JP6647650B1 - Recording device, recording method and program - Google Patents

Abstract

An object of the present invention is to provide a technique capable of detecting with high accuracy whether or not an impact to record an image has occurred. A recording device that records an image based on an impact, comprising: an acquisition unit that acquires acceleration data indicating a vehicle acceleration and vehicle speed data indicating a vehicle speed of the vehicle; and an acceleration and a vehicle speed acquired by the acquisition unit. A determination unit that determines that an impact for recording a video has occurred when at least one of the determination criteria corresponding to each of the plurality of accident types is satisfied. . [Selection diagram] FIG.

Description

  The present invention relates to a recording device, a recording method, and a program.

  2. Description of the Related Art Currently, an in-vehicle camera called a drive recorder capable of constantly recording, for example, an image of a traveling direction while an automobile is running is provided. By attaching a drive recorder to a vehicle that the driver drives, the driver can use the information to explain the situation at the time of the accident or to estimate the cause of the accident.

JP 2018-65680 A

  Originally, the video to be recorded by the drive recorder is the video at the time of the accident. However, most of the currently provided drive recorders basically record the video before and after the timing when the value of the acceleration simply exceeds the threshold value. Therefore, the video is often recorded at a timing irrelevant to the accident, such as a timing at which a simple operation of the vehicle is performed or a timing at which a certain vibration occurs in the vehicle.

  Therefore, an object of the present invention is to provide a technique that can detect with high accuracy whether or not an impact to record an image has occurred.

  A recording device according to one embodiment of the present invention is a recording device that records a video based on an impact, and an acquisition unit that acquires acceleration data indicating a vehicle acceleration and vehicle speed data indicating a vehicle speed of the vehicle. A determination unit that determines that an impact to record a video has occurred, when the acceleration and the vehicle speed obtained in the above correspond to at least one of the determination criteria corresponding to each of the plurality of accident types. Have.

  ADVANTAGE OF THE INVENTION According to this invention, the technique which can detect the presence or absence of the impact which should record a video more accurately can be provided.

FIG. 2 is a diagram illustrating a configuration example of a drive recorder according to the embodiment. It is a figure showing an example of a drive recorder. FIG. 2 is a diagram illustrating an example of a functional block configuration of a drive recorder according to the embodiment. It is a flowchart which shows an example of the processing procedure at the time of determining the presence or absence of an impact. FIG. 4 is a diagram illustrating an example of an acceleration detected by an acceleration sensor. FIG. 4 is a diagram illustrating an example of an acceleration detected by an acceleration sensor. 9 is a flowchart illustrating an example of a processing procedure of supplementary condition 2.

  An embodiment of the present invention will be described with reference to the accompanying drawings. In each of the drawings, the components denoted by the same reference numerals have the same or similar configurations.

<Apparatus configuration>
FIG. 1 is a diagram illustrating a configuration example of a drive recorder 10 according to the present embodiment. The drive recorder 10 has a processor 11, a memory 12, an input device 13, an output device 14, an imaging device 15, an acceleration sensor 16, a GPS module 17, and a storage medium 18.

  The input device 13 is, for example, an operation button, a touch panel, a microphone, and the like. The output device 14 is, for example, a display and / or a speaker. The photographing device 15 is a camera that photographs the front of the drive recorder 10. The photographing device 15 may further include a camera that photographs the rear of the vehicle. The acceleration sensor 16 is a sensor that measures the acceleration of the drive recorder 10 in the front-back direction, the left-right direction, and the up-down direction. The GPS module 17 is a sensor that receives a radio wave from a GPS satellite and measures the current position of the drive recorder 10. The drive recorder 10 can acquire vehicle speed data of a vehicle on which the drive recorder 10 is mounted, based on the moving speed of the current position measured using the GPS module 17. The storage medium 18 is a non-volatile memory such as an SD card, and records an image photographed by the photographing device 15. The storage medium 18 may be removable.

  FIG. 2 shows an example of the drive recorder 10. On the front of the drive recorder 10, a lens of the photographing device 15 is provided. The fixing unit 20 is a base for fixing the drive recorder 10 to a windshield of a vehicle. The longitudinal acceleration measured by the acceleration sensor 16 corresponds to the X-axis acceleration. Similarly, the acceleration in the left-right direction corresponds to the acceleration in the Y-axis direction, and the acceleration in the vertical direction corresponds to the acceleration in the Z-axis direction.

  Note that the hardware configuration shown in FIG. 1 is merely an example, and the hardware configuration of the drive recorder 10 according to the present embodiment is not limited to the hardware configuration shown in FIG. For example, it may further include an interface capable of inputting vehicle speed data output from a vehicle-mounted computer, or may include a communication IF for performing wireless communication. Further, some hardware such as the GPS module 17 may be omitted.

  The drive recorder 10 (recording device) according to the present embodiment acquires the acceleration and the vehicle speed of the vehicle to which the drive recorder 10 is attached, and determines whether or not an impact for recording a video has occurred based on the acquired acceleration and the vehicle speed. Is determined. Further, when an impact for recording an image occurs, the image data before and after the timing when it is determined that the impact has occurred is recorded.

<Function block configuration>
FIG. 3 is a diagram illustrating a functional block configuration example of the drive recorder 10 according to the present embodiment. The drive recorder 10 includes a storage unit 100, an acquisition unit 101, a determination unit 102, and a recording unit 103. The storage unit 100 can be realized using the memory 12 and / or the storage medium 18 included in the drive recorder 10. Further, the acquisition unit 101, the determination unit 102, and the recording unit 103 can be realized by the processor 11 of the drive recorder 10 executing a program stored in the memory 12. Further, the program can be stored in a storage medium. The storage medium storing the program may be a non-transitory computer-readable storage medium (Non-transitory computer readable medium). The non-transitory storage medium is not particularly limited, but may be a storage medium such as a USB memory or a CD-ROM.

  The storage unit 100 stores various determination reference data used when the determination unit 102 determines the presence or absence of an accident, and video data that is a video captured by the imaging device 15.

  The acquisition unit 101 has a function of acquiring acceleration data measured by the acceleration sensor 16 and vehicle speed data indicating a vehicle speed of the vehicle.

  The judging unit 102 displays the image when the acceleration and the vehicle speed acquired by the acquiring unit 101 correspond to at least one of the criterion corresponding to each of the plurality of accident types included in the criterion data. Has a function of determining that an impact to be recorded has occurred. More specifically, the determination unit 102 determines that the acceleration and the vehicle speed acquired by the acquisition unit 101 are a determination condition corresponding to a small accident (first accident type) and a determination condition corresponding to a medium accident (second accident type). When at least one of the condition and the determination condition corresponding to the major accident (third accident type) is satisfied, it is determined that an impact for recording an image has occurred.

  A small accident is an accident in which the impact applied to the vehicle is small. For example, a collision between a car and a person, a collision at an extremely low speed of about 10 km or less, or a driver suddenly brakes even if the collision does not actually occur. It is assumed that the vehicle has been stopped by putting on the vehicle. The medium accident is an accident in which the impact applied to the vehicle is moderate, and for example, an accident in which the speed at the time of collision is about 10 km to 20 km is assumed. The major accident is an accident at a level at which the airbag is opened, for example, an accident at a collision speed of 20 km or more is assumed.

  Note that the definitions of the small accident, the middle accident, and the large accident are merely examples, and the present embodiment is not limited to these. In addition, the speed at the time of collision used to explain the definitions of small, medium and large accidents was used only to make it easier to imagine the magnitude of the impact for the sake of explanation, and is not limited to this. It is not something to be done. The present embodiment is not limited to the three-stage classification of a small accident, a middle accident, and a large accident. Depending on the magnitude of the impact applied to the vehicle, the vehicle may be classified into more types of accidents.

  When the determination unit 102 determines that an impact for recording a video has occurred, the recording unit 103 stores the video data captured by the imaging device 15 before and after the determined timing as recorded video data. Recorded in the unit 100.

<Processing procedure>
FIG. 4 is a flowchart illustrating an example of a processing procedure when the drive recorder 10 determines the presence or absence of an impact. While the power of the drive recorder 10 is ON, the determination unit 102 repeatedly determines the presence or absence of an impact by repeatedly performing the processing procedure from step S10 to step S18 illustrated in FIG.

  In step S10, the obtaining unit 101 obtains acceleration data. More specifically, the acquisition unit 101 acquires acceleration data in the front-back direction, the left-right direction, and the up-down direction measured by the acceleration sensor 16. In addition, the acquisition unit 101 acquires the moving speed of the drive recorder 10 (ie, the moving speed of the vehicle) calculated based on the time change of the position of the drive recorder 10 (ie, the position of the vehicle) acquired by the GPS module. . Note that, when vehicle speed data output from a vehicle-mounted computer is input to the drive recorder 10, the obtaining unit 101 may obtain the input vehicle speed data. More accurate vehicle speed data can be obtained.

  The output value from the acceleration sensor 16 is an acceleration in a direction opposite to the acceleration actually applied to the drive recorder 10. For example, suppose that the driver steps on the brake suddenly, and a 0.6 G deceleration G is applied to the drive recorder 10. In this case, the acceleration sensor 16 outputs data indicating that an acceleration of 0.6 G has occurred in the forward direction (X direction). In the following description, except for the description of the specific examples shown in FIGS. 5 and 6, the acceleration or deceleration means not the output value from the acceleration sensor 16 but the acceleration or deceleration generated in the drive recorder 10. And Further, the deceleration means a negative acceleration.

  In step S11, the determination unit 102 determines whether or not the acquired acceleration matches a criterion corresponding to a small accident. If they match, the process proceeds to step S14, and if they do not match, the process proceeds to step S12. Specifically, the determination unit 102 calculates a moving average value for a predetermined period (first period) for the magnitude of acceleration in the front-rear direction, and the calculated moving average value is larger than a predetermined threshold value (first threshold value); If it is detected that the deceleration of the vehicle speed is equal to or greater than a predetermined deceleration (first deceleration), it is determined that the criterion corresponding to the small accident is satisfied.

  FIG. 5A shows an example of the acceleration detected by the acceleration sensor 16 when the driver who sensed the accident steps on the sudden brake and stops. FIG. 5B shows an example of the acceleration detected by the acceleration sensor 16 when the vehicle gets over the step. The vertical axis indicates acceleration in the front-rear direction, and the horizontal axis indicates time. The period P1 indicates a predetermined period (first period) for calculating the moving average value. The threshold value P2 indicates a predetermined threshold value (first threshold value). Graphs AC1 and AC2 are longitudinal accelerations, and graphs MA1 and MA2 are moving averages of longitudinal accelerations. The predetermined period (first period) may be, for example, 0.5 seconds, but is not limited to this. The predetermined threshold (first threshold) may be, for example, about 0.5 to 0.7 G, but is not limited thereto.

  In the example of FIG. 5A, the moving average value MA1 of the acceleration in the front-rear direction exceeds the threshold value P2 at the timing of time t1. Therefore, the determination unit 102 determines that the acceleration matches the determination criterion corresponding to the small accident at the timing of the time t1. On the other hand, in the example of FIG. 5B, the moving average value MA2 of the acceleration in the front-rear direction does not exceed the threshold value P2. Therefore, the determination unit 102 determines that the determination criterion does not match the small accident. Returning to FIG. 4, the description will be continued.

  The determination unit 102 determines that the deceleration of the vehicle speed is a predetermined deceleration (first deceleration) during a predetermined time (second period) before and after the timing of the time t1 when the moving average value becomes larger than the predetermined threshold (first threshold). It may be determined whether the speed is equal to or higher than the speed. The predetermined time (second period) may be a time length such as 2 seconds or 3 seconds, for example, but is not limited thereto. Further, the determination unit 102 may instruct the recording unit 103 to record the video data before and after the timing, assuming that the timing of the time t1 is a timing at which an impact for recording a video has occurred. Good.

  As described above, a small accident is assumed to be a collision accident between a car and a person, a collision accident at an extremely low speed, or a situation in which the driver stops suddenly with a sudden brake even before the accident. When the moving average of the magnitude of the acceleration is a predetermined threshold value (first threshold value) and the deceleration is equal to or more than the predetermined deceleration, it is detected as a small accident, so that the minute vibration of the road is detected. Thereby, it is possible to prevent a small accident from being erroneously determined to be a small accident.

  In addition, it is possible to more accurately determine the deceleration by using the deceleration instead of the magnitude of the acceleration in the front-rear direction when the driver applies the sudden brake.

  In step S12, the determination unit 102 determines whether the acceleration and the vehicle speed data match the determination criterion corresponding to the middle accident. If they match, the process proceeds to step S14, and if they do not match, the process proceeds to step S13. Specifically, the determination unit 102 sums the magnitude of the acceleration in the left-right direction and the magnitude of the acceleration in the front-rear direction at the same time, and responds to the middle accident when the total value is larger than a predetermined threshold (second threshold). It is determined that the determination condition is satisfied. The predetermined threshold (second threshold) may be, for example, about 2 to 4 G, but is not limited thereto.

  The determination unit 102 regards the timing of the time t2 when the total value becomes larger than the predetermined threshold value (second threshold value) as a timing at which an impact for recording a video has occurred, and notifies the recording unit 103 of the timing before and after the timing. It may be instructed to record video data.

  In the determination criterion corresponding to the middle accident, the acceleration in the left-right direction and the acceleration in the front-rear direction are combined, and whether or not the combined value exceeds a certain value is detected. This is because the middle accident is different from the small accident in that when the vehicles come into contact with each other, the acceleration instantaneously increases and immediately decreases.

  In step S13, the determination unit 102 determines whether the acceleration and vehicle speed data match the determination criteria corresponding to a major accident. If they match, the process proceeds to step S14, and if they do not match, the process proceeds to step S18. Specifically, the determination unit 102 determines that the sum of the maximum value of the magnitude of the acceleration in the front-rear direction and the maximum value of the magnitude of the acceleration in the vertical direction is greater than a predetermined threshold (third threshold), and If the time at which the maximum value of the magnitude of the acceleration in the front-rear direction is measured and the time at which the maximum value of the magnitude of the vertical acceleration is measured are within a predetermined period (within a third period), It is determined that the determination condition corresponding to the accident is satisfied.

  6A and 6B show examples of acceleration detected by the acceleration sensor 16 when a large accident occurs. The vertical axis of A in FIG. 6 indicates the acceleration in the front-rear direction, and the horizontal axis indicates time. The vertical axis of B in FIG. 6 indicates the acceleration in the left-right direction, and the horizontal axis indicates time. Graph AC3 is the acceleration in the front-rear direction, and graph AC4 is the moving average value of the acceleration in the left-right direction. The determination unit 102 measures the total value of the maximum value g1 of the acceleration in the front-rear direction and the maximum value g2 of the acceleration in the left-right direction is greater than a predetermined threshold (third threshold), and measures the maximum value g1 of the acceleration in the front-rear direction. If the determined time t3 and the time t4 at which the maximum value g2 of the lateral acceleration is measured exist within a predetermined period (within a third period), it is determined that the determination condition corresponding to the major accident is satisfied. The period within the predetermined period (within the third period) may be, for example, 0.05 to 0.1 seconds, but is not limited thereto. The predetermined threshold value (third threshold value) may be, for example, about 6 to 8 G, but is not limited thereto.

  The criterion corresponding to a major accident allows not only the sum of acceleration values at the same time, but also the sum of acceleration values at different times, like the criterion corresponding to a medium accident. This is because the more serious the accident, the shorter the time of impact generation and the more likely it is that the timing of impact in the front-rear direction and the left-right direction tends to be slightly different. This is because it is difficult to judge a large accident more accurately just by doing.

  If a slight deviation occurs, it is not possible to judge properly with the method of synthesizing instantaneous values like a middle accident, but it is necessary to sum the maximum values of acceleration in the front and rear direction and left and right direction, that is, the values of acceleration at different times To solve this problem.

  In step S14, the acquisition unit 101 acquires information indicating whether the type of the vehicle in which the drive recorder 10 is installed is a large vehicle. The type of the vehicle in which the drive recorder 10 is installed may be a type preset by a user via a user interface or the like provided in the drive recorder 10 when the drive recorder 10 is installed in the vehicle. In addition, a large vehicle means vehicles, such as a truck, a bus, and a trailer, for example. If the type of the vehicle is a large vehicle, the process proceeds to step S15, and if not, the process proceeds to step S16.

  In step S15, when the type of the vehicle is a large vehicle, the determination unit 102 further determines whether the deceleration of the vehicle speed is equal to or greater than a predetermined deceleration (fourth deceleration). If the deceleration is equal to or more than the predetermined deceleration, the process proceeds to step S16. If the deceleration is less than the predetermined deceleration, the process proceeds to step S18. The predetermined deceleration (fourth deceleration) may be the same value as the predetermined deceleration (first deceleration) described in the criterion corresponding to the small accident, or may be a different value. Good.

  In a large-sized vehicle, there is a possibility that a large impact may be generated on the vehicle body due to vibration during traveling due to unloading of a load or loading of a heavy object such as a vehicle, but by providing the processing procedure of step S15, In such a case, the possibility of erroneous determination can be suppressed.

  In step S16, when the determining unit 102 determines that at least one of the additional conditions described below is satisfied, the determination unit 102 proceeds to the processing procedure of step S17, and determines that all of the additional conditions are not satisfied. The process may proceed to the processing procedure of step S18. Alternatively, when the determination unit 102 determines that all the additional conditions among the additional conditions described below are satisfied, the determination unit 102 proceeds to the processing procedure of step S17, and when it determines that at least one additional condition is satisfied, the processing of step S18 is performed. The procedure may proceed.

(Supplementary conditions 1)
The determination unit 102 may determine that an impact for recording an image has occurred when detecting that the vehicle speed has become zero. The timing for determining whether or not the vehicle speed is zero is set, for example, after a lapse of a predetermined time (for example, 10 seconds, 15 seconds, or the like) from the timing when it is determined that an impact for recording an image has occurred. Is also good. This is because the vehicle normally stops when an accident occurs. Further, if the vehicle speed is not zero at the timing, that is, if the vehicle is running, it is considered that no accident or the like has occurred. Good.

(Supplementary condition 2)
FIG. 7 is a flowchart illustrating an example of a processing procedure of supplementary condition 2.

  In step S20, the determination unit 102 determines whether the magnitude of the vertical acceleration is equal to or less than a predetermined threshold (fifth threshold). If the difference is equal to or smaller than the predetermined threshold, the process proceeds to step S22. If it exceeds the predetermined threshold value, the process proceeds to step S21. The predetermined threshold value may be, for example, 0.1 G, but is not limited thereto.

  In step S21, the determination unit 102 determines that the magnitude of the vertical acceleration exceeds a predetermined threshold (fifth threshold) and that the magnitude of the vertical acceleration is equal to the magnitude of the vertical acceleration It is determined whether or not the sum of the magnitude of the acceleration in the direction or the sum of the magnitude of the acceleration in the up-down direction and the magnitude of the acceleration in the front-rear direction is equal to or less than a predetermined ratio. If the ratio is equal to or smaller than the predetermined ratio, the process proceeds to step S22. If the ratio exceeds the predetermined ratio, the process proceeds to step S23. The predetermined ratio may be, for example, 2%, but is not limited to this.

  In step S22, the determination unit 102 determines that an impact has been detected. In step S23, the determination unit 102 determines that no impact has been detected.

  Basically, the higher the acceleration, the higher the possibility of an accident, but if a strong acceleration occurs in the up-down direction compared to the left-right acceleration, it is assumed that the vehicle just jumped up and down due to steps, etc. That's because. By providing the supplementary condition 2, the possibility of erroneous determination in such a case can be suppressed. Returning to FIG. 4, the description will be continued.

(Supplementary condition 3)
If the sum of the magnitude of the acceleration in the left-right direction, the magnitude of the acceleration in the front-rear direction, and the acceleration in the up-down direction during the predetermined determination period is within the predetermined range (sixth range), May not be determined that an impact to be recorded has occurred. The predetermined determination period may be, for example, from two minutes before to the current time, but is not limited to this. The predetermined range (sixth range) is defined as a range from an acceleration normally measured when the drive recorder 10 is correctly mounted to an acceleration measured when the drive recorder 10 is coming off from the windshield. It is desirable to set the range.

  Among the cases in which the drive recorder 10 falls off the windshield and falls down regardless of the accident, the case in which the adhesive is peeling off before the fall and the drive recorder 10 fluctuates for a long time. There are many. Therefore, by applying the supplementary condition 3, it is possible to suppress erroneous detection due to a poor mounting of the drive recorder 10.

<Modification>
As described above, in the processing procedure described with reference to FIG. 4, some processing procedures may be skipped. For example, steps S14 to S16 may be omitted. In this case, if it is determined in step S11, step S12, or step S13 that they match, the process may proceed to step S17.

  Further, for example, the processing procedure of step S16 may be omitted. In this case, if it is determined in the processing procedure of step S14 that the vehicle is not a large vehicle, and if it is determined in the processing procedure of step S15 that the speed has suddenly decreased, the process may proceed to the processing procedure of step S17. Good.

  Further, for example, the processing procedure of step S14 and step S15 may be omitted. In this case, if it is determined in step S11, step S12, or step S13 that they match, the process may proceed to step S16.

  The various thresholds and periods used by the determination unit 102 to determine the presence or absence of an impact may have different set values depending on the type of vehicle. For example, depending on whether the vehicle is a passenger vehicle or a large vehicle, various thresholds and periods may be set differently.

  In addition, the judgment criterion corresponding to the above-mentioned medium accident has the same judgment logic as the judgment criterion corresponding to the large accident, and the setting of the predetermined threshold value and the predetermined period is set to different values for the medium accident and the large accident. You may.

  Further, after the processing procedure of step S11-NO, after the processing procedure of step S12-NO, or after the processing procedure of step S13-NO, the determination unit 102 further sets the threshold value under the condition of the minor accident. It may be determined whether or not both the condition changed to a small value and the condition in which the threshold value is changed to a small value in the condition of the middle accident match.

  Specifically, the determination unit 102 calculates a moving average value for a predetermined period (first period) for the magnitude of the acceleration in the front-rear direction, and calculates the moving average value with a predetermined threshold value (a value smaller than the first threshold value). The condition that the deceleration of the vehicle speed is greater than or equal to a predetermined deceleration (first deceleration) and the magnitude of the left-right acceleration and the magnitude of the front-rear acceleration at the same time are defined as: It is determined whether the sum is satisfied and both the condition that the total value is larger than a predetermined threshold value (seventh threshold value that is smaller than the second threshold value) are satisfied. If both conditions are satisfied, the determination unit 102 proceeds to the processing procedure of step S14, and if either one of the conditions is not satisfied, the determination unit 102 proceeds to the processing procedure of step S18. This makes it possible to record an image in a case where a light contact occurs after a sudden braking.

<Summary>
According to the embodiment described above, the drive recorder 10 should record the video when the acceleration and the vehicle speed correspond to at least one of the determination criteria corresponding to each of the plurality of accident types. It was determined that an impact had occurred. This makes it possible to provide a technique that can detect the occurrence of an impact for recording an image with higher accuracy.

  Further, even when it is determined that the accident corresponds to a small accident, a middle accident, and a large accident, it is further determined whether or not the additional condition is satisfied. As a result, it is possible to suppress a case where the vehicle has jumped up and down due to a step or an erroneous determination due to an improper installation of the drive recorder 10, and it is possible to more accurately detect the presence or absence of an impact to record an image. become.

  Further, when the type of the vehicle is a large vehicle, it is determined whether or not the vehicle has suddenly decelerated. As a result, it is possible to suppress erroneous determination due to vibration or impact peculiar to a large vehicle, and it is possible to more accurately detect the presence or absence of an impact to record an image.

  The embodiments described above are intended to facilitate understanding of the present invention, and are not intended to limit and interpret the present invention. The flowcharts and sequences described in the embodiment, the components included in the embodiment, and the arrangement, material, condition, shape, size, and the like of the embodiment are not limited to those illustrated but can be appropriately changed. It is also possible to partially replace or combine the configurations shown in the different embodiments.

  DESCRIPTION OF SYMBOLS 10 ... Drive recorder, 11 ... Processor, 12 ... Memory, 13 ... Input device, 14 ... Output device, 15 ... Photographing device, 16 ... Acceleration sensor, 17 ... GPS module, 18 ... Storage medium, 100 ... Storage unit, 101 ... Acquisition unit, 102: determination unit, 103: recording unit

Claims (10)

A recording device that records a video based on an impact,
An acquisition unit that acquires acceleration data indicating the acceleration of the vehicle and vehicle speed data indicating the vehicle speed of the vehicle,
When the acceleration and the vehicle speed acquired by the acquisition unit correspond to at least one of the determination criteria corresponding to each of a plurality of accident types, it is determined that an impact to record a video has occurred. A determination unit;
Have a,
The determination unit is configured such that the sum of the maximum value of the magnitude of the acceleration in the front-rear direction and the maximum value of the magnitude of the acceleration in the vertical direction is larger than a predetermined threshold value, and the magnitude of the acceleration in the front-rear direction. When the time at which the maximum value of the acceleration is measured and the time at which the maximum value of the magnitude of the acceleration in the vertical direction is measured are within a predetermined period, the time corresponds to one of the plurality of accident types. A recording device that determines that the determination condition is satisfied . The plurality of accident types include a first accident type, a second accident type, and a third accident type that is the one accident type ,
The determination unit is configured to determine whether the condition corresponds to at least one of the determination condition corresponding to the first accident type, the determination condition corresponding to the second accident type, and the determination condition corresponding to the third accident type. Determining that the impact has occurred;
The recording device according to claim 1. The determination unit is configured to determine whether the magnitude of the acceleration in the front-rear direction is greater than a first threshold during a first period and that the deceleration of the vehicle speed is equal to or greater than a first deceleration. Determine that the determination condition corresponding to the type is satisfied,
The recording device according to claim 2. The determination unit satisfies a determination condition corresponding to the second accident type when a total value of the magnitude of the acceleration in the left-right direction at the same time and the magnitude of the acceleration in the front-rear direction is greater than a second threshold. Judge
The recording device according to claim 2. The obtaining unit further obtains a type of the vehicle,
When the type of the vehicle is a large vehicle, the determination unit further determines that the impact has occurred when the deceleration of the vehicle speed is equal to or greater than a fourth deceleration.
Recording apparatus according to any one of claims 2 to 4. The determination unit may determine that at least one of a determination condition corresponding to the first accident type, a determination condition corresponding to the second accident type, and a determination condition corresponding to the third accident type is satisfied. After the determination , when it is detected that the vehicle speed has become zero after a predetermined time has elapsed , it is determined that the impact has occurred,
Recording apparatus according to any one of claims 2 to 5. The determination unit is further directed to a case the magnitude of the acceleration in the up and down direction exceeds the fifth threshold value, and the magnitude of the vertical direction of the acceleration, the magnitude of the vertical direction of the acceleration and the lateral direction, or When it is equal to or less than a predetermined ratio of the sum of the magnitude of the acceleration in the front-rear direction,
Determining that the impact has occurred;
Recording apparatus according to any one of claims 2 to 6. The determination unit does not determine that the impact has occurred when the total value of the magnitude of the lateral acceleration and the magnitude of the longitudinal acceleration in the predetermined determination period is within a predetermined range,
Recording apparatus according to any one of claims 2 to 7. A recording method performed by a recording device that records a video based on an impact,
Acquiring acceleration data indicating the acceleration of the vehicle and vehicle speed data indicating the vehicle speed of the vehicle,
The acquired acceleration and the vehicle speed, a determination criterion corresponding to each of a plurality of accident types, if it corresponds to at least one, a step of determining that an impact to record a video has occurred,
Have a,
The determining step is such that the sum of the maximum value of the magnitude of the acceleration in the front-rear direction and the maximum value of the magnitude of the acceleration in the vertical direction is larger than a predetermined threshold value, and the magnitude of the acceleration in the front-rear direction. If the time at which the maximum value of the acceleration is measured and the time at which the maximum value of the magnitude of the acceleration in the vertical direction is measured are within a predetermined period, the accident type is one of the plurality of accident types. A recording method for determining that the corresponding determination condition is satisfied . Computers that record video based on impact,
Acquiring acceleration data indicating the acceleration of the vehicle and vehicle speed data indicating the vehicle speed of the vehicle,
The acquired acceleration and the vehicle speed, a determination criterion corresponding to each of a plurality of accident types, if it corresponds to at least one, a step of determining that an impact to record a video has occurred,
Was executed,
The determining step is such that the sum of the maximum value of the magnitude of the acceleration in the front-rear direction and the maximum value of the magnitude of the acceleration in the vertical direction is larger than a predetermined threshold value, and the magnitude of the acceleration in the front-rear direction. If the time at which the maximum value of the acceleration is measured and the time at which the maximum value of the magnitude of the acceleration in the vertical direction is measured are within a predetermined period, the accident type is one of the plurality of accident types. A program that determines that the corresponding determination condition is satisfied .

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