JP5133086B2 - Drive recorder - Google Patents

Description

  The present invention relates to a vehicular drive recorder that clarifies a situation at the time of an accident by recording a vehicle running state.

  Recently, when an automobile accident occurs, a drive recorder that records images before and after the accident, vehicle data, etc. has been used in order to help investigate the cause of the accident (for example, Patent Document 1). Drive recorders are widely used especially for trucks and taxis.

  FIG. 6 shows a block diagram of a schematic configuration inside a conventional drive recorder.

  During traveling of the vehicle, the recorder unit 103 records, in the flash memory 105, image data captured by the front camera 101 that mainly captures the situation ahead of the vehicle and information acquired from the various vehicle sensors 102. The various vehicle sensors 102 are sensors that detect various vehicle states, such as a vehicle speed sensor that detects the speed of the vehicle and an input sensor such as a winker or a brake.

  In the flash memory 105, an endless recording area 105a for temporarily recording image data captured by the front camera 101 and various vehicle information obtained from various vehicle sensors 102, and a file for recording these information before and after the occurrence of the accident. A region 105b is provided.

  The recorder unit 103 sequentially records these pieces of information in the endless recording area 105a of the flash memory 105 while the vehicle is traveling. For example, the endless recording area 105a is divided into a plurality of areas, and when the information is sequentially recorded in each area and the information is written in all areas, the oldest data is written. Recording is performed so that new data is overwritten and updated in the area. Therefore, the endless recording area 105a always records the latest information of the image data captured by the front camera 101 and the various vehicle information obtained from the various vehicle sensors 102 for the time recordable in the area. It becomes a state.

  When a collision of the vehicle is detected by the collision sensor 104, that is, when an accident is detected, the recorder unit 103 is recorded in the endless recording area 105a for a predetermined period before and after the collision is detected. Is copied to the file area 105b.

  After the accident occurs, information stored in the file area 105b of the flash memory 105, that is, image data captured by the front camera 101 before and after the occurrence of the accident and various vehicle information detected by the various vehicle sensors 102 Can be used to investigate the cause of the accident.

  On the other hand, large-sized business vehicles such as watering vehicles and salt spray vehicles are equipped with various status display systems for displaying various information at the driver's seat.

  FIG. 7 shows a block diagram of a schematic configuration of various status display systems installed in the water truck.

  In the driver's seat, information in the tank 116 such as the remaining amount of water in the water tank 112 and a sign 113 provided at the rear of the vehicle for display with respect to a vehicle approaching from behind are displayed. A monitor 110 for displaying the sign information 117 is installed. These displays on the monitor 110 are switched by a changeover switch 114 connected to the monitor 110.

  Further, a rear camera 111 for monitoring the state of the rear of the vehicle is provided at the rear of the vehicle, and image data 115 captured by the rear camera 111 is also displayed on the monitor 110. The display switching from the display of the in-tank information 116 and the sign information 117 to the imaged data 115 can be switched manually by the changeover switch 114 or automatically in conjunction with the back gear.

In this way, the image data 115 of the rear camera 111 is displayed on the monitor 110 in conjunction with the back gear, thereby assisting in rearward confirmation that is not directly visible when the vehicle moves backward.
JP 2001-106123 A

  However, the conventional drive recorder mainly captures and records the state in front of the vehicle, and there is no one that images and records the state in the rear of the vehicle.

  For example, by adding a rear camera to the configuration of the conventional drive recorder as shown in FIG. 6, it is possible to record the state of the rear of the vehicle, but in that case, a new rear camera must be provided. However, the cost will increase.

  Further, in the various status display systems equipped in the large business vehicle as shown in FIG. 7, only the imaging data 115 of the rear camera 111 is displayed on the monitor 110 for the backward confirmation at the time of reversing. 115 is not recorded.

  Even when the vehicle is moved backward while confirming the imaging data 115 of the rear camera 111 on the monitor 110, a collision cannot be avoided when a person or other vehicle suddenly jumps out. In such an accident, Since the situation behind the vehicle at the time of the collision is not recorded, it is often difficult to investigate the cause of the accident.

  An object of the present invention is to provide a drive recorder capable of recording image data indicating a situation behind a vehicle with an inexpensive configuration in consideration of the above-described conventional problems.

In order to solve the above-described problem, the first aspect of the present invention provides:
A surrounding imaging unit that images at least the front of the vehicle when traveling;
A rear camera that captures the rear of the vehicle to monitor the rear of the vehicle, a monitor for displaying image data captured by the rear camera, and the surrounding imaging unit are connected and captured by the rear camera. A distributor for distributing the image data,
An imaging data recording unit that is connected to the distributor and records image data captured by the surrounding imaging unit and image data captured by the rear camera;
A collision detection unit for detecting a collision of the vehicle;
A recording data storage unit for storing data recorded by the imaging data recording unit,
When the imaging data recording unit detects a collision of the vehicle, the imaging data recording unit stores only the image data of a predetermined period before and after the time of the collision in the recording data storage unit,
The vehicle is a watering vehicle or a salt spray vehicle,
The monitor is a monitor for displaying information on the control content of the water spray vehicle or salt spray vehicle,
A signal line for transmitting the control content information is connected to the distributor;
The distributor switches data to be displayed on the monitor to information on the control content or image data captured by the rear camera,
The imaging data recording unit starts recording at least one of image data captured by the surrounding imaging unit and image data captured by the rear camera when water spraying or salt spraying is started. It is.

The second aspect of the present invention
The imaging data recording unit starts recording at least one of the image data captured by the surrounding imaging unit and the image data captured by the rear camera when the direction indicator operates. It is a drive recorder of the invention.

The first invention related to the present invention is:
A surrounding imaging unit that images at least the front of the vehicle when traveling;
A rear camera that captures the rear of the vehicle to monitor the rear of the vehicle, a monitor for displaying image data captured by the rear camera, and the surrounding imaging unit are connected and captured by the rear camera. A distributor for distributing the image data,
An image data recording unit that is connected to the distributor and records the image data captured by the surrounding imaging unit and the image data captured by the rear camera;
The monitor is a monitor for car navigation,
The distributor is a drive recorder that is connected to the video input terminal of the car navigation.

The second invention related to the present invention is:
A surrounding imaging unit that images at least the front of the vehicle when traveling;
A rear camera that captures the rear of the vehicle to monitor the rear of the vehicle, a monitor for displaying image data captured by the rear camera, and the surrounding imaging unit are connected and captured by the rear camera. A distributor for distributing the image data,
An image data recording unit that is connected to the distributor and records the image data captured by the surrounding imaging unit and the image data captured by the rear camera;
The imaging data recording unit is always image data captured at the same time by the rear camera when recording the image data captured by the ambient imaging unit also drive recorder that records.

In addition, the third invention related to the present invention is:
A surrounding imaging unit that images at least the front of the vehicle when traveling;
A rear camera that captures the rear of the vehicle to monitor the rear of the vehicle, a monitor for displaying image data captured by the rear camera, and the surrounding imaging unit are connected and captured by the rear camera. A distributor for distributing the image data,
An image data recording unit that is connected to the distributor and records the image data captured by the surrounding imaging unit and the image data captured by the rear camera;
The distributor also receives a back gear change detection signal when the vehicle moves backward,
The distributor is
When not in the back gear, without transmitting the image data captured by the rear camera to the imaging data recording unit,
Wherein when entering the reverse gear is drive recorder Ru is transmitting image data captured by the rear camera to the imaging data recording unit.

The fourth invention related to the present invention is:
A surrounding imaging unit that images at least the front of the vehicle when traveling;
A rear camera that captures the rear of the vehicle to monitor the rear of the vehicle, a monitor for displaying image data captured by the rear camera, and the surrounding imaging unit are connected and captured by the rear camera. A distributor for distributing the image data,
An image data recording unit that is connected to the distributor and records the image data captured by the surrounding imaging unit and the image data captured by the rear camera;
The distributor receives a back gear change detection signal when the vehicle moves backward,
The distributor is
When not in the back gear, without transmitting the image data captured by the rear camera to the imaging data recording unit, the image data captured by the surrounding imaging unit is transmitted to the imaging data recording unit,
De said upon entering the back gear, the image data captured by the surrounding imaging unit without transmitting the captured image data recording unit, which Ru is transmitting image data captured by the rear camera on the imaging data recording unit It is a live recorder.

  According to the present invention, it is possible to provide a drive recorder capable of recording image data indicating a situation behind the vehicle with an inexpensive configuration.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1)
FIG. 1 is a block diagram showing the configuration of a drive recorder and various state display systems mounted on a large business vehicle according to Embodiment 1 of the present invention. Here, a water truck will be described as an example of a large business vehicle.

  The drive recorder according to the first embodiment records image data picked up by a rear camera equipped in various status display systems.

  The drive recorder according to the first embodiment includes a front camera 10 that captures the situation in front of the vehicle, a side camera 11 that captures the situation on the side of the vehicle, a microphone 16 that collects sound in the vehicle interior, Various vehicle sensors 17 for detecting various vehicle states such as a vehicle speed sensor for detecting speed, an input sensor for a blinker, a brake and the like, and a GPS antenna 25 for detecting vehicle position information are provided. In addition, a collision sensor 19 that detects a vehicle collision, image data captured by the front camera 10 and the side camera 11, sound collected by the microphone 16, various vehicle information detected by various vehicle sensors 17, and GPS The memory card 13 for recording vehicle position information detected by the antenna 25 is provided.

  The memory card 13 is a rewritable and removable memory card such as a PC card or an SD card.

  A recording unit 12 that controls recording of information on the memory card 13 according to detection information from the collision sensor 19 is provided. The recording unit 12 is connected to a recording start switch 18 that starts recording on the memory card 13.

  In addition to the above configuration, the drive recorder of the present invention is characterized by including a distributor 20 for distributing image data captured by the rear camera 22 equipped for various status display systems. The front camera 10 and the side camera 11 are connected to the distributor 20. The distributor 20 also receives a back gear state signal 26 indicating whether or not the back gear is engaged.

The front camera 10 and the side camera 11 correspond to an example of the surrounding imaging unit of the present invention, and the collision sensor 19 corresponds to an example of the collision detection unit of the present invention. The recording unit 12 corresponds to an example of the imaging data recording unit of the present invention, and the memory card 13 corresponds to an example of the recording data storage unit of the present invention. Further, the back gear state signal 26 corresponds to an example of the back gear change detection signal of the invention related to the present invention.

  The vehicle on which the drive recorder according to the first embodiment is mounted is a business watering vehicle, and various state display systems as described with reference to FIG. 7 are also mounted. The part enclosed with the dashed-dotted line of FIG. 1 has shown the component part of various status display systems.

  The distributor 20 has a signal line for transmitting the in-tank information 23 such as the remaining amount of water in the water tank and the sprinkling state, and a sign provided at the rear of the vehicle for display on other vehicles approaching the rear. A signal line for transmitting the displayed sign information and a monitor 21 for various status display systems are also connected. That is, the image data captured by the rear camera 22 of the various status display systems, the in-tank information 23 and the sign information 24 are transmitted to the monitor 21 via the distributor 20.

  In the conventional various status display systems, the rear camera 22 is directly connected to the monitor 21 for various status display systems. However, the drive recorder of the first embodiment has a distributor 20 between the rear camera 22 and the monitor 21. The image data captured by the rear camera 22 is also input to the recording unit 12 of the drive recorder.

  Next, a recording processing method to the memory card 13 of the recording unit 12 of the drive recorder according to the first embodiment will be described with reference to FIGS.

  FIG. 2 shows a processing flow in the recording unit 12 of the drive recorder of the first embodiment. Here, as an example, it is assumed that 30 seconds of image data from 20 seconds before the occurrence of the accident to 10 seconds after the occurrence of the accident are stored for cause analysis. In this case, the time of 30 seconds from 20 seconds before the occurrence of the accident to 10 seconds after the occurrence of the accident corresponds to an example of a predetermined period of time before and after the collision according to the present invention.

  First, the recording unit 12 determines whether to start recording in the endless storage area 14 (step S10). The endless storage area 14 is a memory area of the recording unit 12 and is a rewritable semiconductor memory such as a flash memory. When the driver operates the recording start switch 18, the recording unit 12 starts recording various data in the endless storage area 14 (step S11).

  Next, the recording unit 12 determines whether or not the vehicle has collided based on the detection information from the collision sensor 19 (step S12). In a normal traveling state in which detection information indicating a collision is not acquired from the collision sensor 19, the recording unit 12 always includes the respective image data captured by the front camera 10, the side camera 11, and the rear camera 22, and a microphone. The voice data collected at 16, the various vehicle information acquired by the various vehicle sensors 17, and the position information detected by the GPS antenna 25 are sequentially recorded in the endless recording area 14 in the recording unit 12. (Step S14). As described above, during normal traveling in which no collision is detected, the recording unit 12 sequentially records these pieces of information in the endless recording area 14.

  For example, the recording unit 12 divides the endless recording area 14 into a plurality of areas, sequentially records these information in each area, and when information is written in all areas, the oldest data is recorded. Is recorded in such a manner that new data is overwritten and updated in the area in which is written. Therefore, in the endless recording area 14, image data captured by the front camera 10, the side camera 11, and the rear camera 22, audio data collected by the microphone 16, and various vehicles for the time recordable in that area. The latest information of various vehicle information obtained from the sensor 17 and the vehicle position information detected by the GPS antenna 25 is always recorded.

  When the recording unit 12 detects that the vehicle has collided based on the detection information from the collision sensor 19 (step S12), it next determines the elapsed time after the collision (step S13).

  During the period up to 10 seconds after the collision, the image data picked up by the front camera 10, the side camera 11 and the rear camera 22 and the sound collected by the microphone 16 are continuously recorded in the endless recording area 14 in the recording unit 12. Data, various vehicle information obtained from the various vehicle sensors 17, and vehicle position information are sequentially recorded (step S14).

  Then, when 10 seconds have elapsed after the collision, the recording unit 12 copies the latest 30 seconds of information recorded in the endless recording area 14 to the file area 15 of the memory card 13 (step S15). As a result, the memory card 13 stores image data captured by the front camera 10, the side camera 11, and the rear camera 22 for 30 seconds from 20 seconds before the occurrence of the collision to 10 seconds after the occurrence of the collision, the microphone 16. The voice data collected in step S1, the various vehicle information obtained from the various vehicle sensors 17, and the vehicle position information are recorded.

  Here, the file area 15 is an area where data in the memory card 13 can be read and written, and may be the entire area where data can be read and written in the memory card 13, or a part of the area may be used as the file area 15. It may be used.

  By inserting the memory card 13 in which the information about the period before and after the collision point is recorded in the file area 15 into a personal computer or the like and reading the data to display an image, it can be used for analyzing the cause of the accident. . Since the vehicle card position information detected by the GPS antenna 25 is also recorded in the memory card 13, the location of the accident can be accurately grasped.

  Although the endless recording area 14 is provided in the recording unit 12 in the first embodiment, a large capacity memory card is used as the memory card 13 and the endless recording area 14 is provided in the memory card. Temporary recording data may also be recorded on the memory card. Further, when a larger capacity HDD card or the like is used as the memory card 13, it is possible to write long-time information and there is no need to overwrite and update, so that all information is recorded without providing the endless recording area 14. It may be.

  In the first embodiment, the front camera 10 and the side camera 11 are used as an example of the surrounding imaging unit of the present invention. However, instead of the front camera 10 and the side camera 11, a wide area around the vehicle is used. One camera unit that can image the range may be used.

  In the first embodiment, as an example of the predetermined period of time before and after the collision according to the present invention, it is set to 30 seconds from 20 seconds before the occurrence of the accident to 10 seconds after the occurrence of the accident. Not what you want. For example, it may be set so that data for 20 seconds from before the occurrence of the accident to 8 seconds after the occurrence of the accident and before and after the occurrence of the accident is recorded in the file area 15. These times are set based on the memory capacity for recording and the processing performance, but it is desirable that both the recording time before the collision and the recording time after the collision occur are long.

  In the first embodiment, when the driver operates the recording start switch 18, the recording to the memory card 13 is started. However, the direction indicator that the recording unit 12 acquires from the various vehicle sensors 17. Recording on the memory card 13 may be automatically started based on the operating state of the (winker). By interlocking with the operating state of the direction indicator, it is possible to automatically start recording various data in the memory card 13 at the timing when the vehicle starts running from the parked state.

  Further, the in-tank information 23 and the label information 24 input to the distributor 20 are also distributed and input to the recording unit 12, and the recording unit 12 also records these information on the memory card 13. Good. By recording these information, when analyzing at the time of the accident, information in the tank 23 indicating whether the water is sprayed or not, and the sign information 24 such as what kind of sign is displayed at that time It is also possible to analyze the causal relationship.

  In the above description, a water truck is described as an example of a large business vehicle. However, the present invention may be applied to other business vehicles such as a salt spray vehicle, a snowplow, a large universal vehicle, a self-propelled sign car, and a road cleaning car. The drive recorder of the first embodiment can be used.

  Moreover, although the drive recorder of this invention demonstrated the example which uses the rear camera 22 of the various status display systems mounted in a commercial vehicle in FIG. 1, the rear camera used by the option of a car navigation system is utilized. You can also

  FIG. 3 shows a configuration block diagram of a drive recorder that uses the car navigation system according to the first embodiment when the rear camera of the car navigation system is used.

  In FIG. 3, the same reference numerals are used for the same components as in FIG. The part enclosed with the dashed-dotted line of FIG. 3 has shown the component part of the car navigation system, and the other part has shown the component part of the drive recorder.

  In the car navigation system, a car navigation monitor 31 and an optional rear camera 32 for car navigation are connected to the car navigation body 30. The car navigation main body 30 displays a map around the vehicle and the position of the vehicle on the car navigation monitor 31 during normal driving. However, when the vehicle is moved backward in a garage, the car navigation system is linked to the back gear. The display of the vehicle monitor 31 is switched to the display of image data captured by the car navigation rear camera 32 to assist the driver in confirming the rear.

  In the conventional car navigation system, the rear camera 32 for car navigation is directly connected to the car navigation body 30. However, when the rear camera 32 for car navigation is used in the drive recorder of the first embodiment, the rear camera 32 for car navigation is used. It connects to the divider | distributor 20 of this Embodiment 1, and it comprises so that the image data imaged with the rear camera 32 for car navigations may also be input into the recording part 12 of a drive recorder. Further, the distributor 20 is connected to the video input terminal of the car navigation main body 30. Accordingly, in this case, the image data captured by the car navigation rear camera 32 is transmitted to the car navigation main body 30 via the distributor 20.

  The image data captured by the car navigation rear camera 32 as well as the image data captured by the front camera 10 and the side camera 11 by the recording processing method similar to that described with reference to FIGS. 13 is recorded.

  Since the car navigation system is equipped with a GPS antenna, the recording unit 12 does not acquire vehicle position information from the GPS antenna 25 as shown in FIG. May be acquired from the car navigation main body 30.

  As described above, the drive recorder according to the first embodiment can use the rear camera 32 for the car navigation system, and thus can be used not only for business vehicles but also for general vehicles.

(Embodiment 2)
The drive recorder according to the second embodiment of the present invention differs from the drive recorder according to the first embodiment in the recording method in the recording unit 12, and the configuration is the same as that in the first embodiment. Therefore, the configuration of the drive recorder according to the second embodiment is as shown in FIG.

  In the drive recorder of the second embodiment, the image captured by the rear camera 22 according to whether the distributor 20 is in accordance with the back gear state signal 26, that is, in the state where the back gear is on or not. The distribution of data to the recording unit 12 is controlled.

  A recording processing method to the memory card 13 of the recording unit 12 of the drive recorder according to the second embodiment will be described with reference to FIGS. 1 and 4.

  FIG. 4 shows a processing flow in the recording unit 12 of the drive recorder of the second embodiment. FIG. 4 shows a flow after starting recording on the memory card 13. Here, as an example, it is assumed that 30 seconds of image data from 20 seconds before the occurrence of the accident to 10 seconds after the occurrence of the accident are stored for cause analysis.

  The recording unit 12 determines whether or not the vehicle has collided based on the detection information from the collision sensor 19 (step S20).

  In a normal running state in which detection information indicating a collision is not acquired from the collision sensor 19, the recording unit 12 sequentially records data acquired from the distributor 20 in the endless recording area 14.

  In response to the input back gear state signal 26, the distributor 20 switches the data captured by the rear camera 22 so as not to be distributed and does not input the data to the recording unit 12 when the back gear is not engaged (step S20). S21).

  The recording unit 12 sequentially records the data acquired from the distributor 20 in the endless recording area 14. At this time, since the data captured by the rear camera 22 is not input from the distributor, the other information, that is, the image data captured by the front camera 10 and the side camera 11 and the various vehicle sensors 17 are always detected. The various vehicle information and the vehicle position information acquired from the GPS antenna 25 are sequentially recorded in the endless recording area 14 (step S22).

  That is, in a state where the gear is not in the back gear, that is, in a state where the vehicle does not move backward, the image data picked up by the front camera 10 and the side camera 11, the sound data collected by the microphone 16, and the various vehicle sensors 17. Various vehicle information and vehicle position information detected in step S1 are sequentially recorded, and image data captured by the rear camera 22 is controlled not to be recorded.

  Then, when the vehicle is in the back gear state, that is, when the vehicle moves backward, the distributor 20 switches to distribute the data captured by the rear camera 22 in accordance with the input back gear state signal 26. It inputs also to the recording part 12 (step S23).

  Then, since the data captured by the rear camera 22 is also input to the recording unit 12, image data, audio data, various vehicle information, and vehicle position information captured by the front camera 10 and the side camera 11 are input. While continuing to record, the image data captured by the rear camera 22 is also sequentially recorded in the endless recording area 14 (step S24).

  When the recording unit 12 detects that the vehicle has collided based on the detection information from the collision sensor 19 (step S20), it next determines the elapsed time after the collision (step S25).

  During the period until 10 seconds have passed since the collision, image data, audio data, various vehicle information and vehicle position information, back image data captured by the front camera 10 and the side camera 11 are continuously recorded in the endless recording area 14 in the recording unit 12. When in the gear, the image data picked up by the rear camera 22 is continuously recorded (step S22 or step S24).

  When 10 seconds have elapsed after the collision, the recording unit 12 copies the latest 30-second information recorded in the endless recording area 14 to the file area 15 of the memory card 13 (step S26). As a result, the memory card 13 stores image data taken by the front camera 10 and the side camera 11 for 30 seconds from 20 seconds before the occurrence of the collision to 10 seconds after the occurrence of the collision, from various vehicle sensors 17. In the case where the vehicle information and the vehicle position information acquired from the GPS antenna 25 and the back gear are entered, the image data captured by the rear camera 22 is also recorded.

  By inserting the memory card 13 in which the information about the period before and after the collision point is recorded in the file area 15 into a personal computer or the like and reading the data to display an image, it can be used for analyzing the cause of the accident. .

  As described above, in the first embodiment, the image data captured by the front camera 10, the side camera 11, and the rear camera 22 is always recorded at the same time, whereas in the drive recorder of the second embodiment, Controls whether to record only the image data captured by the front camera 10 and the side camera 11 or to record the image data captured by the rear camera 22 in addition to the image data according to the state of the back gear. To do.

  In the state where the vehicle is moving forward, there is a low possibility that the rear portion of the vehicle will collide. Therefore, in the recording unit 12 of the second embodiment, the rear camera 22 only when the back gear is engaged as described above. Control is performed so as to record the image data picked up in (1). Also, when reversing while turning the steering wheel, there is a high possibility of colliding with surrounding people and objects due to the difference in the inner ring, so control is performed so that the image data captured by the front camera 10 is always recorded. Yes.

  By controlling in this way, it is possible to record information for a longer time with the same memory card capacity as in the first embodiment.

  In the second embodiment, the recording control content to the endless recording area 14 is changed by the back gear state signal 26, but the recording unit 12 acquires from various vehicle sensors 17 instead of the back gear state. The content of the recording control may be changed depending on the operating state of the direction indicator (blinker).

  When the direction indicator is activated, it is a case where the vehicle turns an intersection or changes lanes, and the possibility of a rear-end collision from another vehicle increases. By recording the image data captured by the rear camera 22 in conjunction with the operating state of the direction indicator (step S24), the image data at the time of a rear-end collision from another vehicle is also recorded in the memory card 13. .

  Also, the in-tank information 23 of the business vehicle is distributed by the distributor 20 and input to the recording unit 12, and the recording control content is based on the sprinkling state and the salt spraying state instead of the back gear state. It may be changed. When spraying water or spraying salt, the vehicle travels close to the road, so the possibility of involving a pedestrian or a two-wheeled vehicle increases. By recording the image data picked up by the rear camera 22 while spraying water or spraying salt (step S24), the rear image data at such a high risk can also be recorded in the memory card 13. .

  In this case, the control performed based on the water sprinkling state and the salt spraying state controls the distribution of the image data captured by the rear camera by the distributor 20 as in the case of the back gear state signal 26. Alternatively, the information recorded in the endless recording area 14 by the recording unit 12 may be controlled in accordance with these pieces of information.

  In addition, in business vehicles other than water spray vehicles and salt spray vehicles, such as snowplows, large universal vehicles, self-propelled signage vehicles, and road surface cleaning vehicles, the above-mentioned business vehicles are started as well. Such recording control may be performed. For example, when snow removal is started in the case of a snowplow, or when road cleaning is started in the case of a road sweeper, control may be performed so as to start recording data captured by the rear camera.

  Next, FIG. 5 shows another processing flow different from the processing flow in the recording unit 12 of the drive recorder shown in FIG. 4 according to the second embodiment in the recording processing method for the endless recording area 14. FIG. 5 shows a flow after starting recording in the endless recording area 14. Here, as an example, it is assumed that 30 seconds of image data from 20 seconds before the occurrence of the accident to 10 seconds after the occurrence of the accident are stored in the memory card 13 for cause analysis.

  In FIG. 5, the same reference numerals are used for the same processing portions as those in the processing flow of FIG. Processing portions different from the processing flow of FIG. 4 will be described below.

  When the back gear is not engaged, it is the same as in the case of FIG. 4, and the distributor 20 switches so as not to distribute the data captured by the rear camera 22 according to the input back gear state signal 26. The recording unit 12 is not input (step S27).

  The recording unit 12 includes information other than data captured by the rear camera 22, that is, image data captured by the front camera 10 and the side camera 11, various vehicle information detected by the various vehicle sensors 17, and The vehicle position information acquired from the GPS antenna 25 is sequentially recorded in the endless recording area 14 (step S22).

  On the other hand, when in the back gear state, that is, when the vehicle moves backward, unlike the case of FIG. 4, the distributor 20 is imaged by the rear camera 22 in accordance with the input back gear state signal 26. The data is switched to be distributed and input to the recording unit 12, and the data captured by the front camera 10 and the side camera 11 is switched so as not to be distributed and not input to the recording unit 12 (step S28).

  The recording unit 12 sequentially records the data acquired from the distributor 20 in the endless recording area 14. At this time, since data captured by the front camera 10 and the side camera 11 are not input from the distributor, other information, that is, image data captured by the rear camera 22 and the various vehicle sensors 17 are always detected. The various vehicle information and the vehicle position information acquired from the GPS antenna 25 are sequentially recorded in the endless recording area 14 (step S29).

  That is, in the process shown in FIG. 4, the image data captured by the front camera 10 and the side camera 11 is recorded even in the state of being in the back gear (step S24), but in the process shown in FIG. In the state of entering the back gear, control is performed so as not to record the image data captured by the front camera 10 and the side camera 11 but to record the image data captured by the side camera 11 (step S29).

  When the vehicle is moving forward, it is unlikely that the rear part of the vehicle will collide, and when the vehicle is moving backward, it is less likely that the front part of the vehicle will collide. The recording is controlled like this. By controlling in this way, it is possible to record information for a longer time with the same memory card capacity as compared with the processing shown in FIG.

  However, even when the vehicle is moving forward, another vehicle may collide from the rear, or when moving backward while turning the steering wheel, the front of the vehicle may collide. If there is, it is desirable to always record the image data captured by the front camera 10, the side camera 11, and the rear camera 22 at the same time as in the first embodiment.

  The drive recorder of the present invention has an effect of being able to record image data indicating the situation behind the vehicle with an inexpensive configuration, and is useful for commercial vehicles and general vehicles equipped with a rear camera.

The block diagram which shows the structure of the drive recorder and various status display system of Embodiment 1 and Embodiment 2 of this invention The flowchart which shows the process of the recording part of the drive recorder of Embodiment 1 of this invention The block diagram which shows the structure in case the drive recorder of Embodiment 1 of this invention uses the rear camera of a car navigation system. The flowchart which shows the process of the recording part of the drive recorder of Embodiment 2 of this invention The flowchart which shows another process of the recording part of the drive recorder of Embodiment 2 of this invention. Block diagram showing a schematic configuration inside a conventional drive recorder The block diagram which shows schematic structure of the various state display system with which the conventional watering vehicle was equipped.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Front camera 11 Side camera 12 Recording part 13 Memory card 14 Endless recording area 15 File area 16 Microphone 17 Various vehicle sensors 18 Recording start switch 19 Collision sensor 20 Distributor 21 Monitor 22 Rear camera 23 Information in tank 24 Marking information 25 GPS antenna 26 Back gear status signal

Claims (2)

A surrounding imaging unit that images at least the front of the vehicle when traveling;
A rear camera that captures the rear of the vehicle to monitor the rear of the vehicle, a monitor for displaying image data captured by the rear camera, and the surrounding imaging unit are connected and captured by the rear camera. A distributor for distributing the image data,
An imaging data recording unit that is connected to the distributor and records image data captured by the surrounding imaging unit and image data captured by the rear camera;
A collision detection unit for detecting a collision of the vehicle;
A recording data storage unit for storing data recorded by the imaging data recording unit,
When the imaging data recording unit detects a collision of the vehicle, the imaging data recording unit stores only the image data of a predetermined period before and after the time of the collision in the recording data storage unit,
The vehicle is a watering vehicle or a salt spray vehicle,
The monitor is a monitor for displaying information on the control content of the water spray vehicle or salt spray vehicle,
A signal line for transmitting the control content information is connected to the distributor;
The distributor switches data to be displayed on the monitor to information on the control content or image data captured by the rear camera,
The imaging data recording unit starts recording at least one of image data captured by the surrounding imaging unit and image data captured by the rear camera when water spraying or salt spraying is started. .   The imaging data recording unit starts recording at least one of image data captured by the surrounding imaging unit and image data captured by the rear camera when the direction indicator operates. The described drive recorder.

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