JP6774611B2 - Recording control device, recording device, recording control method and recording control program - Google Patents

Description

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

A drive recorder that records driving information of a vehicle records images and sounds inside and outside the vehicle by a camera mounted on the vehicle, as well as the position, speed, and mileage of the vehicle. The purpose of the drive recorder to record information includes safe driving management of the vehicle, alerting the driver, and storing images before and after the accident as evidence.

For example, Patent Document 1 proposes a drive recorder having a means for storing an image based on information input from an acceleration sensor or a voice input device. Further, the drive recorder described in Patent Document 1 records video and audio for a certain period of time, starting from a time point that goes back by the preceding storage time from a certain time point. By recording the video and audio from the time when the preset period is traced back in this way, the drive recorder records both the event that triggered the accident and the accident that occurred thereafter.

Japanese Unexamined Patent Publication No. 2016-009202

However, the period from the start of the event that triggers the accident to the occurrence of the accident may be longer depending on the traveling condition of the vehicle. Therefore, if recording is started retroactively for a certain period of time from the time of the accident, the event that triggers the accident may start before the preset recording start time.

The present invention has been made to solve such a problem, and an object of the present invention is to provide a recording control device, a recording device, a recording control method, and a recording control program for appropriately recording an event that triggers an accident. And.

The recording control device according to the present invention detects the occurrence of a predetermined event, a shooting data acquisition unit that acquires video data of the surroundings of the vehicle, a buffer memory that temporarily stores the video data, and a predetermined event. The distance between the event detection unit, the travel information acquisition unit that acquires the distance between the vehicle traveling in front of or behind the vehicle, and the vehicle traveling in front of or behind the vehicle is less than a preset distance. In this case, the first period, which is a period retroactive from the time when the event is detected, is set longer than when the inter-vehicle distance is greater than or equal to the preset distance, and the first period is traced back from the time when the event is detected. A recording control unit for recording the video data from the time point to the time point when the second period elapses from the time when the event is detected is provided.

Further, the recording control method according to the present invention acquires video data obtained by photographing the surroundings of the vehicle, temporarily stores the video data, detects the occurrence of a predetermined event, and front or rear of the vehicle. If the travel information including the inter-vehicle distance to the vehicle traveling in the vehicle is acquired and the inter-vehicle distance to the vehicle traveling in front of or behind the vehicle is less than the preset distance, the inter-vehicle distance is the preset distance. Compared to the above cases, the first period, which is a period that goes back from the time when the event is detected, is set longer, and from the time when the first period goes back from the time when the event is detected, the second period than when the event is detected. The video data up to the time when the period has elapsed is recorded.

Further, the recording control program according to the present invention causes a computer to acquire video data obtained by photographing the surroundings of the vehicle, temporarily store the video data, detect the occurrence of a predetermined event, and cause the vehicle to perform. When the travel information including the inter-vehicle distance to the vehicle traveling in front or behind is acquired and the inter-vehicle distance to the vehicle traveling in front or behind the vehicle is less than the preset distance, the inter-vehicle distance is preset. The first period, which is a period retroactive from the time when the event is detected, is set longer than the case where the distance is longer than the specified distance, and from the time when the first period is traced back from the time when the event is detected, from the time when the event is detected. Also records the video data up to the time when the second period has elapsed.

INDUSTRIAL APPLICABILITY According to the present invention, it is possible to provide a recording control device, a recording device, a recording control method, and a recording control program that appropriately record an event that triggers an accident.

It is a functional block diagram of the recording apparatus 100 which concerns on Embodiment 1. FIG. It is a figure which shows the relationship between the time and the file output by a record control device 110. It is a figure which shows the setting example of the recording control unit 116 which concerns on Embodiment 1. FIG. FIG. 5 is a flowchart of the recording control device 110 according to the first embodiment. It is a figure which shows the setting example of the recording control unit 116 which concerns on Embodiment 2. FIG. It is a flowchart of the recording control device 110 which concerns on Embodiment 2. FIG. It is a figure which shows the setting example of the recording control unit 116 which concerns on Embodiment 3. FIG. FIG. 5 is a flowchart of the recording control device 110 according to the third embodiment. It is a figure which shows the setting example of the recording control unit 116 which concerns on Embodiment 4. FIG. FIG. 5 is a flowchart of the recording control device 110 according to the fourth embodiment. It is a figure for demonstrating an example of the traveling information acquired by a record control unit 116. It is a figure which shows the setting example of the recording control unit 116 which concerns on Embodiment 5. FIG. 5 is a flowchart of the recording control device 110 according to the fifth embodiment.

Embodiment 1
Hereinafter, embodiments of the present invention will be described with reference to the drawings. A configuration example of the recording device 100 according to the first embodiment will be described with reference to FIG. FIG. 1 is a functional block diagram of the recording device 100 according to the first embodiment. The recording device 100 is used, for example, as a drive recorder mounted on a vehicle. The recording device 100 can be realized as various types of devices such as a computer device that operates by executing a program stored in a memory by a processor. For example, a recording device 100 capable of realizing the functions of the present invention such as a drive recorder that can be retrofitted or portable to a vehicle, a recording device 100 that can be realized as a function of a single unit or another device pre-mounted on a vehicle, and the like. The processor is, for example, a microprocessor, an MPU (Micro Processing Unit), or a CPU (Central Processing Unit). The memory is a volatile memory or a non-volatile memory, and may be composed of a combination of the volatile memory and the non-volatile memory. The processor executes one or more programs including instructions for causing the computer to perform the processes described with reference to the following drawings.

The recording device 100 includes a recording control device 110, a camera 120, a microphone 130, a recording unit 140, a sensor 150, a display unit 160, and a speaker 170. The recording control device 110 is connected to the external device 101. The recording control device 110, the camera 120, the microphone 130, the recording unit 140, the sensor 150, the display unit 160, the speaker 170, and the external device 101 may be directly connected to each other by using a predetermined cable or the like, and is an in-vehicle network. It may be connected via CAN (Controller Area Network).

The external device 101 generates travel information and outputs it to the travel information acquisition unit 114 of the recording control device 110. The external device 101 is, for example, a vehicle speed sensor provided in a vehicle, a distance measuring sensor for measuring an inter-vehicle distance, a car navigation system, or the like, and a part or all of them may be collectively referred to as an external device 101. .. The travel information includes, for example, vehicle speed information. Further, the traveling information may include vehicle position information and the like. Further, the traveling information may include a traveling road type which is a type of the road on which the vehicle is traveling. Further, the travel information may include the inter-vehicle distance to another vehicle traveling in front of or behind the vehicle.

The camera 120 generates video data obtained by photographing the outside of the vehicle. For example, the camera 120 may be one camera that captures only the front outside the vehicle, or may be two cameras that capture the front and rear outside the vehicle. Further, the camera 120 may be two cameras that photograph the outside of the vehicle and the inside of the vehicle. Further, the camera for photographing the outside of the vehicle and the inside of the vehicle may be an all-around camera capable of photographing 360 degrees around.

The microphone 130 collects voice inside or outside the vehicle to generate voice data.

The recording unit 140 records a shooting file including at least video data. The shooting file may include audio data. The recording unit 140 is composed of hardware such as a hard disk, a solid state drive, and a card-type memory. The recording unit 140 has a normal recording unit 141 and an event recording unit 142. The normal recording unit 141 and the event recording unit 142 may be configured as memory areas having different addresses in the recording unit 140, or may be configured as different hardware. Further, the virtual address or flag based on the information written in the header, payload, or the like of the shooting data recorded in the recording unit 140 may be referred to as a normal recording unit 141 and an event recording unit 142. Further, the recording unit 140 may be an external recording device to which shooting data is transmitted by a communication function (not shown).

The sensor 150 is, for example, an acceleration sensor, and detects a speed change, that is, an acceleration in the front-rear direction, the left-right direction, or the vertical direction of the vehicle. That is, the sensor 150 detects the acceleration generated by an impact or the like generated when a vehicle equipped with the recording device 100 causes an accident or is involved in an accident. Further, the sensor 150 may detect the speed of the vehicle.

The display unit 160 is a display for reproducing the video data recorded on the recording unit 140. The speaker 170 reproduces the audio data recorded in the recording unit 140. The speaker 170 includes a voice amplification unit and a voice processing unit (not shown), and even when the speaker 170 is described, these are included.

Subsequently, a configuration example of the recording control device 110 will be described. The recording control device 110 includes a shooting data acquisition unit 111, a buffer memory 112, a video processing unit 113, a traveling information acquisition unit 114, an event detection unit 115, a recording control unit 116, and a reproduction control unit 117. Each component constituting the recording control device 110 is, for example, software stored in a memory. Further, each component constituting the recording control device 110 may be hardware such as a circuit or a chip. Further, each component constituting the recording control device 110 may be a combination of software and hardware.

The shooting data acquisition unit 111 acquires the video data generated by the camera 120 and the audio data generated by the microphone 130. Data including video data and audio data may be referred to as shooting data. It can be said that the shooting data acquisition unit 111 includes a video data acquisition unit and an audio data acquisition unit. That is, the shooting data acquisition unit 111 acquires shooting data from the camera 120 and the microphone 130. The video data is, for example, H. 264 or H. It is generated using a method such as 265. Further, the audio data may be generated by using, for example, a PCM (Pulse Code Modulation) method, and the shooting data which is the moving image data including the video data and the audio data is MPEG (Moving Picture Experts Group) 2 -It may be generated using TS (Transport Stream), AVI (Audio Video Interleave), or the like. The shooting data acquisition unit 111 outputs shooting data including video data and audio data to the buffer memory 112.

The buffer memory 112 temporarily stores the shooting data output by the shooting data acquisition unit 111. The buffer memory 112 may be referred to as a built-in memory built in the recording control device 110. Temporarily storing may mean, for example, erasing the shooting data in which the buffer memory 112 has passed a preset period. Alternatively, the temporary storage may mean that the data output from the shooting data acquisition unit 111 is overwritten with the data in the buffer memory 112 and stored. Alternatively, the temporary storage may mean that when the buffer memory 112 outputs the shooting data output from the shooting data acquisition unit 111 to the video processing unit 113, the output shooting data is erased. The buffer memory 112 outputs the temporarily stored shooting data to the video processing unit 113.

The video processing unit 113 receives an instruction from the recording control unit 116, processes the shooting data output by the buffer memory 112, generates a shooting file, and outputs the shooting file to the recording unit 140. That is, the video processing unit 113 may, for example, process the shooting data output by the buffer memory 112 and generate a shooting file for a preset time. Further, the video processing unit 113 may process the shooting data output by the buffer memory 112 to generate a shooting file having a preset angle of view. Further, the video processing unit 113 processes the shooting data output by the buffer memory 112, generates shooting data at a preset time or a preset angle of view, and adds header information such as a file name. , You may generate a shooting file. Further, the video processing unit 113 may process the shooting data output by the buffer memory 112 to perform noise removal, distortion correction, and the like of the shooting data, and the shooting data includes time information, vehicle speed information, or vehicle position information. You may generate shooting data displaying such as.

The traveling information acquisition unit 114 acquires the traveling information output from the external device 101 or the like and outputs it to the recording control unit 116. The travel information acquisition unit 114 acquires travel information for each preset period, for example. The travel information acquired by the travel information acquisition unit 114 is not limited to the external device 101, and may be acquired from a sensor or the like included in the recording device 100.

The event detection unit 115 detects the occurrence of an event using the information output from the sensor 150. For example, when the impact level detected by the sensor 150 operating as an acceleration sensor exceeds a preset value, the event detection unit 115 detects that an event such as sudden braking, dangerous driving, or a traffic accident has occurred. To do. When the impact level exceeds a preset value, it may be paraphrased that the acceleration exceeds a preset value. When the event detection unit 115 detects the occurrence of an event, the event detection unit 115 outputs information indicating that the event has occurred to the recording control unit 116. The information indicating that the event has occurred may include the time when the event occurred. Further, the information indicating that the event has occurred may include the value of the acceleration from the time when the event occurred to the time when the event occurred from the time when the preset period is traced back from the time when the event occurred.

The recording control unit 116 sends an instruction to the video processing unit 113 to cause the video processing unit 113 to generate a shooting file (hereinafter, referred to as a normal shooting file) that is not caused by an event detected by the event detection unit 115. Then, the recording control unit 116 sends an instruction to the video processing unit 113, and outputs the generated normal shooting file to the recording unit 140. Further, the recording control unit 116 receives the travel information output by the travel information acquisition unit 114 and the information output by the event detection unit 115, sends an instruction to the image processing unit 113, and shoots the image processing unit 113 due to the event. Generate a file (hereinafter referred to as an event shooting file). Then, the recording control unit 116 sends an instruction to the video processing unit 113, and outputs the generated event shooting file to the recording unit 140. For example, the recording control unit 116 may output a file name, file type information, or the like to the video processing unit 113 as header information for generating a shooting file. Further, the recording control unit 116 may determine the start time and the end time of the shooting file and output the shooting file to the video processing unit 113.

The recording control unit 116 separates the event shooting file and the normal shooting file and causes the recording unit 140 to record the file. To separately record the event shooting file and the normal shooting file in the recording unit 140, the recording control unit 116 sets flag information or the like indicating that the event shooting file is an event shooting file in the header or payload of the event shooting file. It may be. Further, the recording control unit 116 may set flag information or the like indicating that the normal shooting file is a normal shooting file in the header or payload of the normal shooting file, or may not set the flag information. That is, the shooting data for which the flag information is not set may be recognized as a normal shooting file. On the contrary, if the header or payload of the normal shooting file is set with the flag information indicating that the normal shooting file is used, the flag information may not be set in the event shooting file. Further, the recording control unit 116 may have the normal shooting file recorded in the normal recording unit 141 and the event shooting file recorded in the event recording unit 142.

Further, the recording control unit 116 may record the event shooting file in the recording unit 140 as overwrite-prohibited data. For example, the recording control unit 116 may record the event shooting file in the recording unit 140 by designating the address of the memory area in the recording unit 140 that prohibits overwriting of data. Alternatively, the recording control unit 116 may set flag information or the like indicating overwriting prohibition in the header or payload of the event shooting file. The memory area in the recording unit 140 that prohibits overwriting of data and the address of the memory area in the recording unit 140 that records the event shooting file may match, and one of the memory areas may match the other memory area. It may be included in.

Further, the recording control unit 116 may record the normal shooting file in the recording unit 140 as data that can be overwritten. For example, the recording control unit 116 may record a normal shooting file in the recording unit 140 by designating the address of the memory area in the recording unit 140 that enables overwriting of data. Alternatively, the recording control unit 116 may set flag information or the like indicating that the header or payload of the normal shooting file can be overwritten. The address of the memory area in the recording unit 140 that enables overwriting of data and the address of the memory area in the recording unit 140 that records a normal shooting file may match, and one of the memory areas may match the other memory. It may be included in the area.

The playback control unit 117 acquires the shooting data recorded in the recording unit 140, outputs the video data based on the acquired shooting data to the display unit 160, and outputs the audio data based on the acquired shooting data to the speaker 170 or the like. To do. When the reproduction control unit 117 receives the reproduction instruction information of the photographing file input by the user who operates the recording device 100, the reproduction control unit 117 acquires the photographing file desired to be reproduced from the memory area in the recording unit 140.

Next, the relationship between the shooting file and time will be described with reference to FIG. FIG. 2 is a diagram showing a relationship between a file output by the recording control device 110 and time. The horizontal axis of FIG. 2 indicates that time elapses from time tn0 to time tn2. Further, the band-shaped file group 10 shown parallel to the time axis indicates a normal shooting file output by the recording control device 110. The video processing unit 113 sequentially generates normal shooting files for each Pn for a preset period. The preset period Pn may be, for example, several tens of seconds or several minutes. For example, the shooting data from the time tn0 to the time tn1 is the normal shooting file Fn (0). That is, the video processing unit 113 generates the shooting data from the time tn0 to the time tn1 as the normal shooting file Fn (0), and outputs the shooting data to the normal recording unit 141 of the recording unit 140. Next, the video processing unit 113 generates the shooting data from the time tn1 to the time tn2 as the normal shooting file Fn (1) and outputs it to the normal recording unit 141. Similarly, the video processing unit 113 generates the normal shooting file Fn (2) starting from the time tn2 and outputs it to the normal recording unit 141.

When the image processing unit 113 generates the normal shooting file, the buffer memory 112 stores a longer time than the shooting data processed as the normal shooting file. In the case of the example of FIG. 2, the shooting data stored in the buffer memory 112 has a longer time than Pn. The video processing unit 113 processes the shooting data for the time Pn from the shooting data stored in the buffer memory 112 to generate a normal shooting file. That is, the video processing unit 113 generates a normal shooting file after the shooting data of the time Pn is stored in the buffer memory 112.

The recording unit 140 may preset the number of shooting files to be recorded. In that case, the recording unit 140 may record a new shooting file after deleting the oldest shooting file after recording a preset number of shooting files. Further, the recording unit 140 may overwrite the new shooting file with the area in which the oldest shooting file is recorded.

Next, the event shooting file will be described. The file 20 shown in a rectangular shape is an event shooting file Fe. The event shooting file Fe is a shooting file including shooting data from time te1 to time te2.

Here, the principle of generating the event shooting file Fe will be described. First, when an event such as a strong impact being applied to the vehicle occurs, the event detection unit 115 detects the event at time te0 immediately after the event occurs. The event detection unit 115 outputs information indicating that an event has occurred to the recording control unit 116. The recording control unit 116 receives the information output by the event detection unit 115, and the second period p2 elapses from the time te0 when the event is detected from the time te1 which is the first period p1 retroactive from the time te0 when the event is detected. The video processing unit 113 is instructed to process the shooting data up to the time te2 as a file format. The video processing unit 113 receives an instruction from the recording control unit 116 and generates shooting data from time te1 to time te2 output from the buffer memory 112 as an event shooting file Fe. Further, the video processing unit 113 outputs the event shooting file Fe to the recording unit 140 in response to an instruction from the recording control unit 116. The event shooting file Fe may include information that overwriting is prohibited in the header or payload. Further, the area in which the event shooting file Fe is recorded may be an area in which overwriting is prohibited.

The event shooting file Fe recorded in this way includes shooting data from the time te1 which is the first period p1 back from the time te0 when the event was detected to the time when the event occurs. In this way, the video data is recorded from a time point that goes back a preset period from the time when the event occurs in order to identify the cause of the event such as an accident.

The recording control unit 116 can determine the first period p1 according to the travel information output by the travel information acquisition unit 114. The recording control unit 116 acquires the speed information immediately before the time te1 when the event is detected. Immediately before here is a timing at which the traveling speed of the vehicle at the time of event occurrence can be determined. For example, the speed information included in the traveling information acquired at a time retroactive from the time when the event is detected te1 by a preset period. Is. Examples of the preset period are 1 second, 5 seconds, 10 seconds, and the like. The running speed is not limited to these preset periods, and may be the average speed of a period having a preset width that is traced back from the time te1 at which the event was detected. For example, it is the average speed from 10 seconds before to 1 second before the time when the event is detected. Then, the recording control unit 116 can lengthen the first period p1 as the acquired vehicle speed increases. Further, the recording control unit 116 is set to make the first period p1 longer when the acquired vehicle speed is equal to or higher than the preset speed and less than the preset speed.

By setting the first period p1 in this way, for example, when the event shooting file is recorded at a relatively low speed on a general road and when the event shooting file is recorded on a highway or the like. It is possible to set the recording start time of the event shooting file of.

The video processing unit 113 may perform a process of generating a normal shooting file and a process of generating an event shooting file in parallel. Further, the video processing unit 113 may sequentially perform a process of generating a normal shooting file and a process of generating an event shooting file.

FIG. 3 is a table showing an example of the setting of the recording control unit 116 according to the first embodiment. The recording control unit 116 acquires the traveling speed v of the vehicle at a time when the event is detected and the time te0 is traced back to a preset period. When the traveling speed v is less than V1 (for example, less than 60 km / h), the first period p1 is set to Ps (for example, 10 seconds). On the other hand, when the traveling speed v is V1 or more (for example, 60 km / h or more), the first period p1 is set to Pf (for example, 20 seconds) longer than Ps. The second period p2 is set to Pe (for example, 10 seconds) in each case. Of course, the specific speeds and periods listed here are just examples. Therefore, the second period p2 may be changed depending on the value of the traveling speed v.

Next, the processing of the recording control device 110 will be described with reference to FIG. FIG. 4 is a flowchart showing the processing of the recording control device 110 according to the first embodiment.

First, when the recording device 100 is activated, the shooting data acquisition unit 111 outputs shooting data including at least video data to the buffer memory 112. The buffer memory 112 starts storing shooting data, that is, buffering (step S100).

Next, the recording control unit 116 starts a process of causing the video processing unit 113 to generate a normal shooting file and outputting it to the recording unit 140, as described with reference to FIG. 2 (step S101). The process in which the video processing unit 113 generates a normal shooting file and outputs it to the recording unit 140 is hereinafter referred to as normal recording. The video processing unit 113 continues normal recording until the system is terminated. The recording unit 140 sequentially records the normal shooting files output by the video processing unit 113. In addition to performing the above-described processing, the video processing unit 113 may perform the processing of generating the event shooting file described below and outputting it to the recording unit 140 in parallel.

Next, the recording control unit 116 acquires the travel information output from the travel information acquisition unit 114 every preset time (for example, 100 milliseconds) (step S102). The recording control unit 116 may store the traveling information for a preset period in the memory.

Next, the recording control unit 116 monitors the information output from the event detection unit 115 every preset time (for example, 100 milliseconds), and determines whether or not an event has been detected (step S103). .. When the recording control unit 116 does not determine that the event has been detected (step S103: No), the recording control unit 116 determines whether or not all the shooting data stored in the buffer memory 112 has been transmitted to the video processing unit 113 (step S109). When the recording control unit 116 determines that the event has been detected (step S103: Yes), the recording control unit 116 proceeds with the process of determining the first period p1 in order to generate the event shooting file.

The recording control unit 116 monitors the information of the travel information acquisition unit 114, and acquires the travel speed v at a time retroactive to a preset period from the time when the event is detected. Then, the recording control unit 116 determines whether or not the traveling speed v is V1 or higher (step S104).

When the recording control unit 116 determines that the traveling speed v is V1 or higher (step S104: Yes), the recording control unit 116 sets the first period p1 to Pf (step S105). On the other hand, when the recording control unit 116 does not determine the traveling speed v to be V1 or higher (step S104: No), the recording control unit 116 sets the first period p1 to Ps as a setting when the traveling speed v is less than V1. Is set to (step S110).

When the recording control unit 116 determines the first period p1, it sends an instruction to the video processing unit 113 to start the generation of the event shooting file (step S106). The recording control unit 116 monitors the time and determines whether or not the second period p2 exceeds the preset period Pe (step S107). When it is not determined that the second period p2 exceeds Pe (step S107: No), the recording control unit 116 causes the video processing unit 113 to continue generating the event shooting file. On the other hand, when it is determined that the second period p2 exceeds Pe (step S107: Yes), the recording control unit 116 stops the video processing unit 113 from generating the event shooting file, and the video processing unit 113 generates the event. The shooting file is output to the recording unit 140 (step S108).

When the recording of the event shooting file is completed, the recording control unit 116 determines whether or not all the shooting data in the buffer memory 112 has been transmitted to the video processing unit 113 (step S109). When the recording control unit 116 determines that all the shooting data in the buffer memory 112 has been transmitted to the video processing unit 113 (step S109: Yes), the recording control unit 116 ends the process. When all the shooting data in the buffer memory 112 is transmitted to the video processing unit 113, for example, when the driver performs an operation to stop shooting, or when the engine is stopped and shooting by the camera 120 is stopped. And so on.

On the other hand, when the recording control unit 116 does not determine that all the shooting data in the buffer memory 112 has been transmitted to the video processing unit 113 (step S109: No), the recording control unit 116 continues recording the normal shooting file and at the same time. The process of monitoring the information output from the event detection unit 115 and determining whether or not an event has been detected (step S103) is repeated.

With the configuration as described above, it is possible to provide a recording control device, a recording device, a recording control method, and a recording control program that appropriately record an event that triggers an accident.

Embodiment 2
Next, the second embodiment will be described. In the second embodiment, the setting of the traveling speed v and the first period p1 in the recording control unit 116 is different from that of the first embodiment. It should be noted that the description of matters that overlap with the contents already described will be omitted as appropriate.

FIG. 5 is a table showing a setting example of the recording control unit 116 according to the second embodiment. The recording control unit 116 acquires the traveling speed v of the vehicle at a time when the event is detected and the time te0 is traced back to a preset period. When the traveling speed v is less than V1 (for example, less than 60 km / h), the first period p1 is set to Ps (for example, 10 seconds). When the traveling speed v is V1 or more (for example, 60 km / h or more) and less than V2 (for example, less than 80 km / h), the first period p1 is set to Pm (for example, 20 seconds) longer than Ps. When the traveling speed v is V2 or more (for example, 80 km / h or more), the first period p1 is set to Pf (for example, 30 seconds) longer than Pm. The second period p2 is set to Pe (for example, 10 seconds) in each case. Of course, the specific speeds and periods listed here are just examples. Therefore, the second period p2 may be changed depending on the value of the traveling speed v.

Next, the processing of the recording control device 110 according to the second embodiment will be described with reference to FIG. FIG. 6 is a flowchart of the recording control device 110 according to the second embodiment. In the flowchart shown in FIG. 6, the processes of steps S100 to S103 and steps S106 to S109 are the same as the flowchart of the first embodiment shown in FIG. Therefore, here, the processing that overlaps with the first embodiment will be described while being omitted as appropriate.

First, when the recording device is activated, the buffer memory 112 starts storing shooting data, that is, buffering (step S100). After that, up to step S103 is the same as the process of the first embodiment.

When it is determined in step S103 that the recording control unit 116 has detected the event (step S103: Yes), the recording control unit 116 determines whether or not the traveling speed v is V1 or more (step S204).

When the recording control unit 116 does not determine the traveling speed v to be V1 or more (step S204: No), the recording control is set as the setting when the traveling speed v is less than V1 based on the setting in the table shown in FIG. The unit 116 sets the first period p1 to Ps (step S208). On the other hand, when the recording control unit 116 determines that the traveling speed v is V1 or higher (step S204: Yes), the recording control unit 116 further determines whether or not the traveling speed v is V2 or higher (step S205).

When the recording control unit 116 does not determine the traveling speed v to be V2 or more (step S205: No), the recording control unit 116 sets the first period p1 to Pm as a setting when the traveling speed v is V1 or more and less than V2. Is set to (step S207). On the other hand, when the recording control unit 116 determines that the traveling speed v is V2 or higher (step S205: Yes), the recording control unit 116 sets the first period p1 to Pf (step S206).

When the setting process of the first period p1 is completed in this way, the recording control unit 116 then starts generating the event shooting file (step S106). Subsequent processing is the same as in the first embodiment.

In this way, a value of 2 or more may be set for the first period p1 in the recording control unit 116. That is, the recording control unit 116 can lengthen the first period p1 as the acquired vehicle speed increases.

Embodiment 3
Next, the third embodiment will be described. The third embodiment is different from the first embodiment in that the travel information includes information on the travel path on which the vehicle travels. It should be noted that the description of matters that overlap with the contents already described will be omitted as appropriate.

FIG. 7 is a table showing a setting example of the recording control unit 116 according to the third embodiment. The recording control unit 116 acquires the travel path type r of the vehicle at a time when the event is detected and the time te0 is traced back to a preset period. In the example shown in FIG. 7, the road on which the vehicle travels is classified into three types, a general road (r = 0), a main road (r = 1), and an expressway (r = 2), according to the road type r. There is. The travel path type r is information for identifying the travelable speed of the vehicle. General roads include, for example, roads traveling at relatively low speeds such as urban areas, farm roads, and forest roads. Highways include, for example, motorways that are not expressways, general national highways, and other roads that travel at higher speeds than general roads and at lower speeds than highways. Highways include, for example, nationally designated highways. The travel path type r is not limited to the classification described here, and may be classified based on information such as road width, legal speed, and traffic volume.

In FIG. 7, when the travel path type r is 0, the first period p1 is set to Ps (for example, 10 seconds). When the travel path type r is 1, the first period p1 is set to Pm (for example, 20 seconds) longer than Ps. When the travel path type r is 2, the first period p1 is set to Pf (for example, 30 seconds) longer than Pm. The second period p2 is set to Pe (for example, 10 seconds) in each case. Of course, the specific speeds and periods listed here are just examples. Therefore, the second period p2 may be changed depending on the value of the travel path type r.

Next, the process of the recording control device 110 according to the third embodiment will be described with reference to FIG. FIG. 8 is a flowchart of the recording control device 110 according to the third embodiment. In the flowchart shown in FIG. 8, the processes of steps S100 to S103 and steps S106 to S109 are the same as the flowchart of the first embodiment shown in FIG. Therefore, here, the processing that overlaps with the first embodiment will be described while being omitted as appropriate.

First, when the recording device is activated, the buffer memory 112 starts storing shooting data, that is, buffering (step S100). After that, up to step S103 is the same as the process of the first embodiment.

When it is determined in step S103 that the recording control unit 116 has detected an event (step S103: Yes), the recording control unit 116 determines whether or not the travel path type r in which the vehicle is traveling is 0 (step). S304).

When the recording control unit 116 determines that the travel path type r is 0 (step S304: Yes), the recording control unit 116 sets the first period p1 to Ps based on the settings in the table shown in FIG. 7 (step S304: Yes). Step S308). On the other hand, when the recording control unit 116 does not determine the travel path type r as 0 (step S304: No), the recording control unit 116 further determines whether or not the travel path type r is 1 (step S305). ..

When the recording control unit 116 determines that the travel path type r is 1 (step S305: Yes), the recording control unit 116 sets the first period p1 to Pm (step S307). On the other hand, when the recording control unit 116 does not determine the travel path type r as 1 (step S305: No), the recording control unit 116 sets the first period p1 as a setting when the travel path type r is 2. It is set to Pf (step S306).

When the setting process of the first period p1 is completed in this way, the recording control unit 116 then starts generating the event shooting file (step S106). Subsequent processing is the same as in the first embodiment.

In this way, the recording control unit 116 can lengthen the first period p1 based on the acquired type of travel path.

In the above-described first to third embodiments, the first period p1 is lengthened depending on the traveling speed of the vehicle or the type of traveling path having a different traveling speed. For example, when a vehicle is traveling at a relatively high speed or on a highway, the event may occur even before the conventional retroactive recording period, such as competitiveness with other vehicles, fanning, or fanning. There are signs that By recording the signs of the occurrence of such an event, it is possible to grasp the situation such as the cause of the accident.

Embodiment 4
Next, the fourth embodiment will be described. The fourth embodiment is different from the first embodiment in that the traveling information includes information on the distance between the vehicle and the vehicle traveling in front of or behind the vehicle. It should be noted that the description of matters that overlap with the contents already described will be omitted as appropriate.

FIG. 9 is a table showing a setting example of the recording control unit 116 according to the fourth embodiment. The recording control unit 116 acquires the inter-vehicle distance d from the vehicle traveling in front of or behind the vehicle at a time when the event is detected and the time te0 is traced back to a preset period. The time points that go back from the time te0 to the preset period are, for example, 10 seconds before the time te0, 20 seconds before the time te0, and the like. This period preferably includes a time point before the first period p1. Further, as an example, this period may be determined based on the average value of the inter-vehicle distance d between 30 seconds and 20 seconds before the time te0. In FIG. 9, when the inter-vehicle distance d is D1 or more (for example, 15 meters or more), the first period p1 is set to Ps (for example, 10 seconds). When the inter-vehicle distance d is less than D1 (for example, 15 meters or more) and D2 or more (for example, 7 meters or more), the first period p1 is set to Pm (for example, 20 seconds) longer than Ps. When the inter-vehicle distance d is less than D2 (for example, less than 7 meters), the first period p1 is set to Pf (for example, 30 seconds). Of course, the specific numerical values given here are only examples. Therefore, the second period p2 may be changed according to the value of the inter-vehicle distance d.

Next, the processing of the recording control device 110 according to the fifth embodiment will be described with reference to FIG. FIG. 10 is a flowchart of the recording control device 110 according to the fourth embodiment. In the flowchart shown in FIG. 10, the processes of steps S100 to S103 and steps S106 to S109 are the same as the flowchart of the first embodiment shown in FIG. Therefore, here, the processing that overlaps with the first embodiment will be described while being omitted as appropriate.

First, when the recording device is activated, the buffer memory 112 starts storing shooting data, that is, buffering (step S100). After that, up to step S103 is the same as the process of the first embodiment.

When it is determined in step S103 that the recording control unit 116 has detected the event (step S103: Yes), the recording control unit 116 has a vehicle-to-vehicle distance d at a time when the event is traced back to a preset period. It is determined whether or not it is the above (step S405).

When the recording control unit 116 determines that the inter-vehicle distance d is D1 or more (step S405: Yes), the first period p1 is set to Ps (step S409). On the other hand, when the recording control unit 116 does not determine the inter-vehicle distance d to be D1 or more (step S405: No), the recording control unit 116 further determines whether or not the inter-vehicle distance d is D2 or more (step S406).

When the recording control unit 116 determines that the inter-vehicle distance d is D2 or more (step S406: Yes), the recording control unit 116 sets the first period p1 to Pm (step S408). On the other hand, when the recording control unit 116 does not determine the inter-vehicle distance d to be D2 or more (step S406: No), the recording control unit 116 sets the first period p1 as a setting when the inter-vehicle distance d is less than D2. It is set to Pf (step S407).

When the setting process of the first period p1 is completed in this way, the recording control unit 116 then starts generating the event shooting file (step S106). Subsequent processing is the same as in the first embodiment.

In addition, the recording control unit 116 monitors all the information of the plurality of inter-vehicle distances output in the preset period among the information of the inter-vehicle distances output by the traveling information acquisition unit 114, thereby performing the first period p1. You may decide.

FIG. 11 is a diagram for explaining an example of traveling information acquired by the recording control unit 116. In FIG. 11, the horizontal axis represents time. Reference numerals td-1 to td + 5 exemplify a part of the time when the recording control unit 116 receives the travel information from the travel information acquisition unit 114. At time td-1, the recording control unit 116 acquires the inter-vehicle distance d-1 as information on the inter-vehicle distance from the traveling information acquisition unit 114. Similarly, the recording control unit 116 acquires the inter-vehicle distance d0 from the traveling information acquisition unit 114 at the time td0. Similarly, the recording control unit 116 acquires the inter-vehicle distance information at each time. The recording control unit 116 sequentially and temporarily stores the inter-vehicle distance information for a preset period.

When determining the first period p1, the recording control unit 116 provides information on the inter-vehicle distance over the period pd1 from the time td0 to the time td4, which is a time point retroactively from the time te0 at which the event was detected, that is, the time td4. Refer to the inter-vehicle distance d0 to the inter-vehicle distance d4. Then, the recording control unit 116 determines whether or not each of the information on the inter-vehicle distance over the period pd1 from the time td0 to the time td4 is included in the preset distance. That is, for example, the inter-vehicle distance d shown in FIG. 9 includes all the inter-vehicle distance d0 to the inter-vehicle distance d4. That is, the recording control unit 116 acquires the inter-vehicle distance d0 at the time point td0 that goes back a preset period from te0 when the event is detected. Then, when the inter-vehicle distance d0 to the inter-vehicle distance d4 acquired in the period pd1 are all less than the preset distance, the recording control unit 116 may perform the inter-vehicle distance more than or equal to the preset distance. The first period p1 is lengthened.

In this way, the recording control unit 116 can lengthen the first period p1 based on the acquired information on the inter-vehicle distance.

In the fourth embodiment described above, the first period p1 is lengthened when the distance between the vehicle and another vehicle is narrow for a preset period. For example, in the case of being fanned by another vehicle, there may be a sign that triggers an event even before the conventional retroactive recording period. By recording the signs of the occurrence of such an event, it is possible to grasp the situation such as the cause of the accident.

Embodiment 5
Next, the fifth embodiment will be described. The fifth embodiment is different from the fourth embodiment in that the traveling information includes information on the distance between the vehicle and the vehicle traveling in front of or behind the vehicle and the speed information of the vehicle. It should be noted that the description of matters that overlap with the contents already described will be omitted as appropriate.

FIG. 12 is a table showing a setting example of the recording control unit 116 according to the fifth embodiment. The recording control unit 116 acquires the traveling speed v and the inter-vehicle distance d of the vehicle at a time when the event is detected and the time te0 is traced back to a preset period. In FIG. 12, when the traveling speed v is less than V1 (for example, less than 30 kilometers per hour), the first period p1 is set to Ps (for example, 10 seconds) regardless of the inter-vehicle distance d. When the traveling speed v is V1 or more (for example, 30 km / h or more) and the inter-vehicle distance d is D1 or more (for example, 15 meters or more), the first period p1 is set as Ps (for example, 10 seconds). There is. When the traveling speed v is V1 or more (for example, 30 km / h or more) and the inter-vehicle distance d is less than D1 (for example, 15 meters or more) and D2 or more (for example, 7 meters or more), the first period p1 is Ps. It is set to be longer than Pm (for example, 20 seconds). Further, when the traveling speed v is V1 or more (for example, 30 km / h or more) and the inter-vehicle distance d is less than D2 (for example, less than 7 meters), the first period p1 is set to Pf (for example, 30 seconds). Has been done. Of course, the specific speeds and periods listed here are just examples. Therefore, the second period p2 may be changed depending on the value of the traveling speed v or the inter-vehicle distance d.

Next, the processing of the recording control device 110 according to the fifth embodiment will be described with reference to FIG. FIG. 13 is a flowchart of the recording control device 110 according to the fourth embodiment. In the flowchart shown in FIG. 13, the processes of steps S100 to S103 and steps S106 to S109 are the same as the flowchart of the first embodiment shown in FIG. Therefore, here, the processing that overlaps with the first embodiment will be described while being omitted as appropriate.

First, when the recording device is activated, the buffer memory 112 starts storing shooting data, that is, buffering (step S100). After that, up to step S103 is the same as the process of the first embodiment.

When it is determined in step S103 that the recording control unit 116 has detected the event (step S103: Yes), the recording control unit 116 determines whether or not the traveling speed v of the vehicle is V1 or more (step S504).

When the recording control unit 116 does not determine the traveling speed v to be V1 or higher (step S504: No), the recording control unit 116 sets the first period p1 to Ps based on the settings in the table shown in FIG. 9 (step S504: No). Step S409). On the other hand, when the recording control unit 116 determines that the traveling speed v is V1 or more (step S504: Yes), the recording control unit 116 further determines whether or not the inter-vehicle distance d is D1 or more (step S405).

When the recording control unit 116 determines that the inter-vehicle distance d is D1 or more (step S405: Yes), the first period p1 is set to Ps (step S409). On the other hand, when the recording control unit 116 does not determine the inter-vehicle distance d to be D1 or more (step S405: No), the recording control unit 116 further determines whether or not the inter-vehicle distance d is D2 or more (step S406).

When the recording control unit 116 determines that the inter-vehicle distance d is D2 or more (step S406: Yes), the recording control unit 116 sets the first period p1 to Pm (step S408). On the other hand, when the recording control unit 116 does not determine the inter-vehicle distance d to be D2 or more (step S406: No), the recording control unit 116 sets the first period p1 as a setting when the inter-vehicle distance d is less than D2. It is set to Pf (step S407).

When the setting process of the first period p1 is completed in this way, the recording control unit 116 then starts generating the event shooting file (step S106). Subsequent processing is the same as in the first embodiment.

In this way, the recording control unit 116 can lengthen the first period p1 based on the acquired travel speed and inter-vehicle distance information.

In the fifth embodiment described above, when the own vehicle is traveling at a speed equal to or higher than the preset running speed in a state where the distance between the own vehicle and another vehicle is narrow for a preset period, the first period p1 Is getting longer. For example, except when the distance between the vehicle and another vehicle is narrowed due to traffic jams, the event may occur when a dangerous distance between the vehicles continues while driving, such as when the vehicle is fanned by another vehicle. Signs occur before the traditional retrospective recording period. Therefore, by appropriately recording the signs of such an event occurrence, it is possible to grasp the situation such as the cause of the accident.

The present invention is not limited to the above embodiment, and can be appropriately modified without departing from the spirit.

100 Recording device 101 External device 110 Recording control device 111 Shooting data acquisition unit 112 Buffer memory 113 Video processing unit 114 Driving information acquisition unit 115 Event detection unit 116 Recording control unit 117 Playback control unit 120 Camera 130 Microphone 140 Recording unit 141 Normal recording unit 142 Event recording unit 150 Sensor 160 Display unit 170 Speaker

Claims (5)

A shooting data acquisition unit that acquires video data of the surroundings of the vehicle,
A buffer memory that temporarily stores the video data and
An event detection unit that detects the occurrence of a predetermined event, and
A traveling information acquisition unit that acquires the distance between the vehicle and the vehicle traveling in front of or behind the vehicle and the traveling speed of the vehicle .
Immediately before the event detection unit detects an event, the traveling speed of the vehicle is equal to or higher than a preset speed, and the distance between the vehicle and the vehicle traveling in front of or behind the vehicle is less than the preset distance . When the running is continued , the first period, which is a period retroactive from the time when the event is detected, is set longer than when the inter-vehicle distance is equal to or longer than the preset distance, and the first period is set longer than when the event is detected. A recording control unit that records the video data from the time when one period is traced back to the time when the second period elapses from the time when the event is detected.
A recording control device comprising. The recording control unit has an average value of the distance between the vehicle and the vehicle traveling in front of or behind the vehicle in a predetermined period at a time retroactive from the detection of the event, which is less than the preset distance. In this case, the first period, which is a period retroactive from the time when the event is detected, is set longer than when the inter-vehicle distance is greater than or equal to the preset distance.
The recording control device according to claim 1 . The recording control device according to claim 1 or 2 ,
A recording device including at least one of a camera that captures the video and a recording unit that records the video data. Acquire video data of the surroundings of the vehicle and
The video data is temporarily stored and
Detects the occurrence of a predetermined event and
Acquire driving information including the distance between the vehicle and the vehicle traveling in front of or behind the vehicle and the traveling speed of the vehicle .
Immediately before the event detecting unit detects the event, at a traveling speed of the vehicle is previously set speed or traveling at less than the distance which the inter-vehicle distance is set in advance with the vehicle traveling in front or rear of the vehicle When is continued , the first period, which is a period retroactive from the time when the event is detected, is set longer than when the inter-vehicle distance is greater than or equal to the preset distance, and the first period is set longer than when the event is detected. The video data is recorded from the time when the period is traced back to the time when the second period elapses from the time when the event is detected.
A record control method performed by a record controller. On the computer
Acquire video data of the surroundings of the vehicle,
The video data is temporarily stored and
Detects the occurrence of a predetermined event and
Acquire driving information including the distance between the vehicle and the vehicle traveling in front of or behind the vehicle and the traveling speed of the vehicle .
Immediately before the event detecting unit detects the event, at a traveling speed of the vehicle is previously set speed or traveling at less than the distance which the inter-vehicle distance is set in advance with the vehicle traveling in front or rear of the vehicle When is continued , the first period, which is a period retroactive from the time when the event is detected, is set longer than when the inter-vehicle distance is greater than or equal to the preset distance, and the first period is set longer than when the event is detected. The video data is recorded from the time when the period is traced back to the time when the second period elapses from the time when the event is detected.
Recording control program.

Images