JP2019008381A - On-vehicle device - Google Patents

Abstract

To provide an on-vehicle device that reduces blind spots of a recorded image when a change in a state of driving a vehicle is detected, and calls attention to a driver when there is an object approaching the vehicle.SOLUTION: A drive recorder 10 includes: a left blinker switch 43 mounted on a vehicle 5 and outputting, for example, a left turn signal to a signal I/F 19; constant-recording cameras CA1 to CAn for recording images in the vicinity of the vehicle 5; preliminary recording cameras RC1 to RCm for recording images in the vicinity of the vehicle 5 with different field angles from the constant-recording cameras CA1 to CAn; and a CPU 11 for starting to store the images recorded by the preliminary recording cameras RC1 to RCm in a video memory 30 in addition to the images recorded by the constant-recording cameras CA1 to CAn when a trigger is generated.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a vehicle-mounted device mounted on a vehicle.

  Conventionally, a drive recorder operates with a preset number of cameras, and it has been difficult to change the number during operation. On the other hand, the video recorded by the drive recorder has a blind spot, and in order to reduce the blind spot of such a video, it is a general measure to increase the number of cameras.

  As a prior art, a front camera, a rear camera, a video signal input unit, a control unit, and a storage unit are provided, and the control unit uses a reverse signal that represents the state of the vehicle according to a reverse signal. Patent Document 1 discloses a drive recorder that selects which of the video signals to be recorded in the storage unit.

  In addition, a distributor to which a rear camera, a monitor, a surrounding imaging unit (including a front camera and a side camera) and an imaging data recording unit are connected is provided, and the imaging data recording unit is imaged by the surrounding imaging unit. Japanese Patent Application Laid-Open No. 2004-228688 discloses a drive recorder that records image data captured by a rear camera via a distributor when a back gear is used.

  Also, when recording video shot by multiple cameras, video shot by the camera selected based on external signals is recorded with high image quality (high bit rate, frame rate or low compression rate), but not selected Japanese Patent Application Laid-Open No. 2004-228688 discloses a drive recorder that records video captured by a camera with low image quality (low bit rate, frame rate, or high compression rate). For example, if there is a left winker signal input, it can be seen that the vehicle is about to turn left, so the CPU switches to a mode in which video captured by a camera installed on the left side of the vehicle is recorded with high image quality.

  In addition, when the GPS position information acquired at the start of shooting / recording by the shooting camera for shooting the rear of the vehicle matches the position information for prohibiting the reverse travel, the image data and the GPS position information acquired by the shooting camera are stored in the vehicle management device. A drive recorder for transmission is disclosed in Patent Document 4.

JP 2008-242913 A JP 2009-193257 A JP 2012-19450 A JP 2013-97609 A

  However, if the number of cameras is easily increased in order to reduce the blind spot of the video, the load on the memory increases and the scale of hardware (including memory) for accessing the memory increases. Further, if the number of cameras is reduced in order to reduce the hardware scale, the blind spots are increased in the captured video and the value of the drive recorder is reduced. Furthermore, even if the blind spots in the video are reduced, the driver may not be aware that there is an object approaching the vehicle, and safety confirmation has not been completed. When the driving state of the vehicle changed, such as when turning left or reverse, the driver had to drive with particular attention to the object approaching the vehicle.

  In Patent Document 1, the front camera and the rear camera that are recorded in the memory are switched, but recording of images captured by both the front camera and the rear camera is not particularly considered. Further, in Patent Document 2, the image data captured by the rear camera when the back gear is engaged is recorded together with the image data captured by the front camera and the side camera. Does not prompt.

  In Patent Document 3, an image captured by a selected camera is switched to high image quality, and an image captured by a non-selected camera is switched to low image quality, but the number of cameras is not changed. Further, Patent Document 4 does not particularly indicate switching of a plurality of cameras.

  The present invention has been made in view of the circumstances described above, and its purpose is to reduce the blind spot of the recorded image when a change in the driving state of the vehicle is detected, and when there is an object approaching the vehicle, The object is to provide an in-vehicle device that alerts the driver.

In order to achieve the above-described object, the vehicle-mounted device according to the present invention is characterized by the following (1) to (4).
(1) A detection unit that detects a change in the driving state of the vehicle, and an image captured by one or more first cameras that capture the periphery of the vehicle when a change in the driving state of the vehicle is detected. In addition to recording, a recording unit that starts recording of an image captured by one or more second cameras that captures the periphery of the vehicle at an angle of view different from that of the first camera, and a monitoring area around the vehicle An alarm unit configured to output an alarm when an object appears in the monitoring area in the video imaged by the second camera.
(2) The vehicle-mounted device having the configuration of (1), wherein the first camera is a constantly-recording camera that captures images that are constantly recorded by the recording unit during driving of the vehicle, and the second camera Is a preliminary recording camera that captures an image recorded by the recording unit while a change in the driving state of the vehicle is detected.
(3) The in-vehicle device having the configuration of (1) or (2), wherein the recording unit detects the change in the driving state of the vehicle when the change in the driving state of the vehicle is detected. Start recording the video imaged at.
(4) The vehicle-mounted device having the configuration of (3), wherein the detection unit is a switch that detects an operation of the left turn signal, and the recording unit is configured to detect the operation of the left turn signal when the operation of the left turn signal is detected. Starting the recording of the second camera that images the left side of the camera.

According to the vehicle-mounted device having the above configuration (1), when a change in the driving state of the vehicle is detected, the blind spot of the recorded image is reduced, and when there is an object approaching the vehicle, the driver is alerted. It can be carried out. In other words, by increasing the number of cameras that record video when a change in the driving state of the vehicle is detected, the blind spot of the video can be reduced, and by limiting the time when the number of cameras increases, The load can be suppressed. In addition, the driver can confirm the safety by grasping the presence or absence of a target (person or the like) in the monitoring area.
According to the vehicle-mounted device having the configuration (2), it is possible to record an image with a small number of blind spots while suppressing a memory load even when an operation of constantly recording an image is performed.
According to the vehicle-mounted device having the configuration of (3) above, even when a change in the driving state of the vehicle is detected, the pre-recording camera corresponding to the change in the driving state is recorded without recording images from all the pre-recording cameras. All you have to do is record a video. Therefore, the memory load can be suppressed.
According to the vehicle-mounted device having the above configuration (4), the driver can notice the presence of an object such as a person when turning left (turning left), and can prevent the person from being involved due to an inner ring difference or the like.

According to the present invention, when a change in the driving state of the vehicle is detected, the blind spot of the recorded image is reduced, and when there is an object approaching the vehicle, the driver can be alerted.
The present invention has been briefly described above. Further, the details of the present invention will be further clarified by reading through a mode for carrying out the invention described below (hereinafter referred to as “embodiment”) with reference to the accompanying drawings. .

FIG. 1 is a block diagram showing a hardware configuration of a drive recorder in the embodiment. FIG. 2 is a diagram illustrating an imaging range of a preliminary recording camera mounted on the vehicle as viewed from the side of the vehicle. FIG. 3 is a diagram illustrating an imaging range of a preliminary recording camera mounted on the vehicle, as viewed from above the vehicle. FIG. 4 is a flowchart showing the operation procedure of the drive recorder. FIG. 5 is a diagram illustrating an imaging range of a preliminary recording camera mounted on a vehicle as viewed from above the vehicle in another operation example 1. FIG. 6 is a diagram illustrating an imaging range of a pre-recording camera mounted on a vehicle as viewed from above the vehicle in another operation example 2. FIG. 7 is a diagram illustrating an imaging range of a pre-recording camera mounted on a vehicle as viewed from above the vehicle in another operation example 3.

  Hereinafter, the vehicle-mounted device according to the present embodiment will be described with reference to the drawings. The vehicle-mounted device of the present embodiment is applied to a drive recorder mounted on a vehicle such as a microbus or a one-box car.

  FIG. 1 is a block diagram showing a hardware configuration of a drive recorder 10 in the embodiment. The drive recorder 10 includes a CPU 11, a video processing unit 12, an image recognition processing unit 13, a program data memory 14, a work data memory 15, a nonvolatile memory 16, a data processing unit 17, and a card interface (I / F) 18. The drive recorder 10 also has a signal I / F 19, a G sensor 20, a GPS receiver 21, a speaker 22, and a power supply I / F 23.

  In the vehicle 5, constant recording cameras CA <b> 1 to CAn and preliminary recording cameras RC <b> 1 to RCm connected to the video processing unit 12 are installed. n and m are arbitrary integers. In the present embodiment, a case where there are two continuous recording cameras CA1 to CAn (n = 3) and two preliminary recording cameras RC1 to RCm (m = 5) is taken as an example. The continuous recording cameras CA1 to CAn and the preliminary recording cameras RC1 to RCm each have an image sensor such as a CCD (charge coupled device) image sensor or a CMOS (complementary metal oxide semiconductor) image sensor. The constant recording cameras CA1 to CAn and the preliminary recording cameras RC1 to RCm are all fixed cameras, pick up a subject at a preset angle of view, and output an image. The constant recording cameras CA1 to CAn and the preliminary recording cameras RC1 to RCm are cameras having the same specifications, but may be cameras having different specifications. The plurality of cameras may include an infrared camera capable of capturing a dark place.

  In the present embodiment, an always-recording camera CA1 that images the front of the vehicle and a constantly-recording camera CA2 that images the vehicle interior from the front are installed above the windshield of the vehicle 5 (see FIGS. 2 and 3). In addition, a preliminary recording camera RC <b> 1 that captures an image of the left side of the vehicle 5 from the front side is installed on the upper left front of the vehicle 5. A preliminary recording camera RC <b> 2 that captures an image of the left side of the vehicle 5 from the rear side is installed in the upper left part of the vehicle 5. A preliminary recording camera RC3 that captures an image of the rear of the vehicle 5 is installed above the rear door 5y of the vehicle 5. A preliminary recording camera RC <b> 4 that captures an image of the right side of the vehicle 5 from the front side is installed in the upper right part of the vehicle 5. A preliminary recording camera RC5 that captures an image of the right side of the vehicle 5 from the rear side is installed in the upper right part behind the vehicle 5.

  The CPU 11 comprehensively controls each unit of the drive recorder 10. When the CPU 11 inputs the left turn signal, the CPU 11 can record the video by the preliminary recording cameras RC1 and RC2. In addition, when the right turn signal is input, the CPU 11 enables recording of images by the preliminary recording cameras RC4 and RC5. Further, when the reverse signal is input, the CPU 11 enables recording of the video by the preliminary recording camera RC3. In addition, when the door opening signal is input, the CPU 11 enables recording of an image by the preliminary recording camera RC1. In addition, the CPU 11 sets a monitoring area DZ around the vehicle 5 in advance and holds it in the nonvolatile memory 16. When the target appears in each monitoring area DZ (see FIG. 3) in the video captured by the preliminary recording cameras RC1 to RC5, the CPU 11 sounds the speaker 22 and outputs an alarm. The target is a person, a part thereof (face), an animal such as a dog or a cat, a motorcycle, a bicycle, a fallen object, an obstacle, or the like.

  The video processing unit 12 inputs video captured by the continuous recording cameras CA1 to CAn and the preliminary recording cameras RC1 to RCm, and performs various image processing. As image processing, processing such as contrast adjustment, color tone correction (white balance), noise removal, and gamma correction is performed. The video processing unit 12 may perform processing such as image enlargement / reduction, rotation, binarization, gray scale conversion, smoothing, color information extraction, contour extraction (edge detection), and the like.

  The image recognition processing unit 13 recognizes a target such as a person or a face that appears in the image. Image recognition techniques are known in various ways. For example, when recognizing the face of a person appearing in the image, the image recognition processing unit 13 detects a face part such as eyes, nose, mouth, a method of detecting skin color, a method of detecting hair, A method of detecting a part such as a shoulder is used. Further, the image recognition processing unit 13 may recognize a target based on a moving object appearing in an image or a size of a specific area occupied in the image in a case other than a human face. In addition, the image recognition processing unit 13 generates a neural network used for artificial intelligence by performing machine learning by deep learning (deep learning), and inputs an image to the neural network, thereby detecting an object such as a face or a person. You may recognize it.

  The program data memory 14 stores various programs such as a recording data display function, a hazard map creation function, a library creation function, and a daily report output function in addition to the basic function program of the drive recorder 10. The work data memory 15 is used as a temporary storage memory when the CPU 11 executes a program. The nonvolatile memory 16 stores data such as a warning sound and various set values. As setting values, a threshold value (speed threshold value) compared with the number of vehicle speed pulse signals, a threshold value (G value threshold value) compared with a G value (acceleration), and setting information of the monitoring area DZ (For example, coordinate values).

  The data processing unit 17 performs video data compression / decompression processing and the like. A video memory 30 for recording video data transferred to and from the data processing unit 17 is detachably connected to the card I / F 18. Examples of the video memory 30 include an SD card, a memory card such as a compact flash (registered trademark), a hard disk drive, and a storage memory such as an SSD (solid state drive). Here, the video memory is an external storage device (including an external storage medium such as a memory card) that can be removed from the drive recorder, but may be a storage medium built in the drive recorder. In the case of an external storage device, video recorded in the external storage device can be displayed on the monitor screen by being connected to an external monitor or a PC equipped with the monitor.

  A brake signal, a right turn signal, a left turn signal, a vehicle speed pulse signal, a reverse signal, an analog signal, and various SW signals are input to the signal I / F 19. The brake signal is a signal that is output when the brake switch (SW) 41 is turned on when the driver performs a brake operation. The right turn signal is a signal that is output when the right turn signal switch (SW) 42 is turned on when the turn signal (direction indicator) is operated in the right direction. The left turn signal is a signal that is output when the left turn signal switch (SW) 43 is turned on when the turn signal is operated in the left direction. A vehicle speed pulse signal is a signal output according to rotation of a wheel. The reverse signal is a signal output when the gear is in the back (reverse). The analog signal is a signal output from, for example, a fuel gauge. The various SW signals are on / off signals such as a door opening / closing SW, a seat belt SW, and an ignition (IGN) SW.

  The G sensor 20 detects an impact applied to the vehicle 5 and outputs a signal corresponding to the impact (acceleration). The GPS receiving unit 21 receives a GPS signal transmitted from a GPS satellite, and acquires current position information (latitude, longitude, altitude). The speaker 22 sounds an alarm sound as a warning. The speaker 22 emits various sounds. When the ignition SW 45 is turned on, the power source I / F 23 is connected to the battery and supplies an appropriate voltage to each part of the drive recorder 10. The power supply I / F 23 supplies a voltage capable of operating the CPU 11 in the power saving mode when the ignition SW 45 is off.

  FIG. 2 is a diagram illustrating the imaging ranges ag1 and ag2 of the preliminary recording cameras RC1 and RC2 mounted on the vehicle 5 as viewed from the side of the vehicle 5. FIG. 3 is a diagram illustrating the imaging ranges ag1 and ag2 of the preliminary recording cameras RC1 and RC2 mounted on the vehicle 5 as viewed from above the vehicle 5. In the present embodiment, the vehicle 5 is a vehicle having a relatively long overall length, such as a microbus or a one-box car. For this reason, the driver turns the vehicle 5 to the left while paying sufficient attention to the side of the vehicle 5 in consideration of the inner wheel difference when turning left.

  On the left side of the vehicle 5, as shown by an arrow y <b> 1, a monitoring area DZ that the driver needs to be careful of so as not to involve a person hm such as a passerby when turning left is set. The monitoring area DZ is set in a range that becomes a blind spot from the line of sight of the driver who sits in the driver's seat during driving. Here, the monitoring area DZ is set on the left side of the vehicle (see FIG. 3) that becomes a blind spot when the vehicle turns left. The monitoring area DZ is set in a block shape over the entire length along the left side of the vehicle 5. The monitoring area DZ is set by registering the corner points of the block as coordinates and creating a closed space connecting the corner points. The shape of the monitoring area is not limited to the block shape, and may be set to a spherical shape, a spindle shape, or the like. Further, the number of monitoring areas is not limited to one, and may be divided into a plurality of areas.

  The angle of view of the preliminary recording camera RC1 is adjusted so that the imaging range ag1 captured by the preliminary recording camera RC1 includes mostly the front of the monitoring area DZ. In addition, the angle of view of the preliminary recording camera RC2 is adjusted so that the imaging range ag2 captured by the preliminary recording camera RC2 includes mostly the rear of the monitoring area DZ. The imaging range ag1 and the imaging range ag2 may include the entire monitoring area DZ or only a part thereof.

  The operation of the drive recorder 10 having the above configuration will be described. The CPU 11 of the drive recorder 10 operates in the power saving mode even when the ignition SW 45 is off.

  FIG. 4 is a flowchart showing the operation procedure of the drive recorder 10. The CPU 11 waits until the ignition SW 45 is turned on (S1). When the ignition SW 45 is turned on, the CPU 11 transitions from the power saving mode to the normal mode, and initializes the drive recorder 10 (S2). In this initialization process, for example, an appropriate voltage is supplied from the power supply I / F 23 to each part of the drive recorder 10, and video data that is always captured by the recording cameras CA1 to CAn and the preliminary recording cameras RC1 to RCm is stored. For example, the storage area of the memory 30 may be initialized (erased). Further, the CPU 11 erases data stored in the work data memory 15.

  The CPU 11 starts continuous image recording, in which video captured by the cameras CA1 and CA2 is recorded in the video memory 30 (S3). The CPU 11 determines whether a trigger has occurred (S4). As the generation of the trigger, for example, when the left turn signal operation is performed by the driver when turning left and the left turn signal switch 43 is turned on, the left turn signal is notified to the CPU 11 via the signal I / F 19. The trigger is not limited to the input of the left turn signal, but the vehicle speed pulse signal notified to the CPU 11 via the signal I / F 19 exceeds the threshold value or the impact (acceleration) detected by the G sensor 20. Occurrence of an event that exceeds a threshold value.

  If no trigger is generated, the CPU 11 determines whether the ignition SW 45 is turned off (S5). When the ignition SW 45 is on, the CPU 11 returns to the process of step S4. On the other hand, when the ignition SW 45 is turned off, the CPU 11 transitions from the normal mode to the power saving mode and ends this operation.

  On the other hand, when a trigger occurs in step S4, the CPU 11 always records the preliminary recording cameras RC1 to RCm (here, RC1 to RC1) in addition to the video recording by the recording cameras CA1 to CAn (here, CA1 and CA2). A recording operation for recording the video imaged by any one of RC5 in the video memory 30 is started (S6). In the case of a left turn, since the images captured by the two preliminary recording cameras RC1 and RC2 are recorded, the images near the beginning and the end are surely ensured even for a long vehicle such as a microbus or a one-box car. Can be caught.

  The CPU 11 determines whether or not the trigger generation has ended (S7). When the generation of the trigger ends, the CPU 11 ends the video recording operation by the preliminary recording cameras RC1 to RCm, and always records only the video by the recording cameras CA1 to CAn (S8). Thereafter, the CPU 11 proceeds to the process of step S5. On the other hand, if the generation of the trigger has not ended in step S7, the CPU 11 determines whether or not a target (here, a person) in the monitoring area DZ has been recognized (S9). When the person is not recognized in the monitoring area DZ, the CPU 11 returns to the process of step S7. On the other hand, when a person is recognized in the monitoring area DZ in step S9, the CPU 11 sounds an alarm sound from the speaker 22 to warn the driver and prompt attention (S10). In step S10, an alarm sound is generated, but a warning may be issued by lighting a lamp installed on an instrument panel or the like. Further, the CPU 11 may warn the driver and record an event of recognizing a person in the monitoring area DZ in the video memory 30. In addition, when the communication unit is provided, the CPU 11 wirelessly transmits the information to the office PC. An event may be sent. Thereafter, the CPU 11 returns to the process of step S7.

  In the above embodiment, when the vehicle 5 turns to the left, the image recording operation by the preliminary recording cameras RC1 and RC2 is shown. However, another example of the operation will be described below when a change in the driving state of the vehicle is detected.

(Other operation example 1)
FIG. 5 is a diagram illustrating an imaging range ag3 of the preliminary recording camera RC3 mounted on the vehicle 5 as viewed from above the vehicle 5 in another operation example 1. When the driver puts the gear back, the CPU 11 inputs a reverse signal via the signal I / F 19. The CPU 11 starts an image capturing / recording operation by the preliminary recording camera RC3 installed above the rear door 5y among the preliminary recording cameras RC1 to RC5. In FIG. 5, when the vehicle 5 moves backward as indicated by the arrow y2, the monitoring area DZ in the image captured by the preliminary recording camera RC3 moves in the back direction together with the imaging range ag3, and the monitoring area DZ in the image It is assumed that a person hm enters. When the person hm enters the monitoring area DZ, the CPU 11 sounds the speaker 22 to give a warning (output an alarm), and prompts the driver to call attention.

(Other operation example 2)
FIG. 6 is a diagram illustrating imaging ranges ag4 and ag5 of the preliminary recording cameras RC4 and RC5 mounted on the vehicle 5 as viewed from above the vehicle 5 in another operation example 2. When the driver operates the right turn signal, the CPU 11 inputs a right turn signal through the signal I / F 19. The CPU 11 starts an image capturing / recording operation by the preliminary recording cameras RC4 and RC5 installed on the upper right side of the vehicle 5 among the preliminary recording cameras RC1 to RC5.

  On the right side of the vehicle 5, there is set a monitoring area DZ that the driver must be careful not to involve the motorcycle bc that is going straight ahead when turning right. Here, the monitoring area DZ is set in a trapezoidal block shape over the entire length along the right side of the vehicle 5.

  The angle of view of the preliminary recording camera RC4 is adjusted so that the imaging range ag4 captured by the preliminary recording camera RC4 includes the front of the monitoring area DZ. Further, the angle of view of the preliminary recording camera RC5 is adjusted so that the imaging range ag5 captured by the preliminary recording camera RC5 includes mostly the rear of the monitoring area DZ. The imaging range ag4 and the imaging range ag5 may include the entire monitoring area DZ or only a part thereof.

  In FIG. 6, when the vehicle 5 tries to turn right as indicated by the arrow y3, the motorcycle bc enters the monitoring area DZ in the image captured by the preliminary recording cameras RC4 and RC5. When the motorcycle bc enters the monitoring area DZ, the CPU 11 sounds the speaker 22 and outputs an alarm.

(Other operation example 3)
FIG. 7 is a diagram illustrating an imaging range of the preliminary recording camera RC1 mounted on the vehicle 5 as viewed from above the vehicle 5 in another operation example 3. Here, a passenger car is assumed as the vehicle 5.

  When the side door 5z is opened by the occupant when the vehicle 5 is stopped, the CPU 11 inputs a door opening signal via the signal I / F 19. The CPU 11 starts an image capturing / recording operation by the preliminary recording camera RC1 installed in front of the vehicle 5 among the preliminary recording cameras RC1 to RC5.

  The monitoring area DZ is set in a slightly short block shape on the side of the vehicle 5. Note that the monitoring area DZ when the door is open may be set to be different from that when turning left. Further, when the door is opened, the imaging / recording operation by the preliminary recording camera RC2 is not started, but may be started.

  In FIG. 7, it is assumed that the bicycle cc is approaching when the side door 5z is opened. When the bicycle cc enters the monitoring area DZ in the imaging range ag1 of the video imaged by the preliminary recording camera RC1, the CPU 11 sounds the speaker 22 to give a warning and prompt the driver to be alerted.

  The drive recorder 10 (on-vehicle device) of the present embodiment is mounted on the vehicle 5 and outputs, for example, a left turn signal to the signal I / F 19 (detects a change in the driving state of the vehicle). And always-recording cameras CA1 to CAn (one or more first cameras) that image the periphery of the vehicle 5, and preliminary recording cameras RC1 to RCm (images that capture the periphery of the vehicle at different angles of view from the constantly-recording cameras CA1 to CAn). One or more second cameras), and when a trigger occurs (when a change in the driving state of the vehicle 5 is detected), in addition to recording images that are always captured by the recording cameras CA1 to CAn, the preliminary recording cameras RC1 to RCm And a CPU 11 (recording unit) that starts recording of the video imaged in the video memory 30. The CPU 11 (alarm unit) sets a monitoring area DZ (monitoring area) around the vehicle 5, and when a target such as a person hm appears in the monitoring area DZ in the image captured by the preliminary recording cameras RC1 to RCm, The speaker 22 is sounded (alarm is output).

  Thereby, the blind spot of the image recorded when the trigger is generated can be reduced, and when there is an object approaching the vehicle, the driver can be alerted. That is, by increasing the number of cameras that record video when a trigger occurs, the blind spot of the video can be reduced, and by limiting the time when the number of cameras increases, the load on the memory can be suppressed. In addition, the driver can confirm the safety by grasping the presence or absence of a target (person or the like) in the monitoring area. Further, the scale of hardware (including memory) for accessing the memory can be reduced, and the drive recorder can be reduced in size.

  The constantly recording cameras CA <b> 1 to CAn are cameras that capture images that are constantly recorded in the image memory 30 by the CPU 11 when the vehicle 5 is in operation. The preliminary recording cameras RC1 to RCm are cameras that capture images recorded by the CPU 11 while a trigger is generated.

  As a result, even when an operation for constantly recording a video is performed, it is possible to record a video with few blind spots while suppressing the memory load.

  In addition, when a trigger is generated (a change in the driving state is detected), the CPU 11 records a video image captured by the preliminary recording cameras RC1 to RCm corresponding to the type of trigger (change in the driving state). Start at 30.

  As a result, even when a trigger occurs, it is only necessary to record the video by the preliminary recording camera corresponding to the change in the operation state without recording the video by all the preliminary recording cameras. Therefore, the memory load can be suppressed.

  Further, when the left turn signal switch 43 is turned on, the CPU 11 starts recording of the preliminary recording camera RC <b> 1 that images the left side of the vehicle 5.

  As a result, the driver notices the presence of an object such as a person when making a left turn (left turn), and can prevent the person from being involved due to an inner ring difference or the like.

  The technical scope of the present invention is not limited to the embodiment described above. The above-described embodiments can be accompanied by various modifications and improvements within the technical scope of the present invention.

  For example, the drive recorder may be a device to which a monitor can be connected. In this case, when a trigger such as a left turn occurs, an image captured by the preliminary recording camera can be displayed on the monitor. The driver can perform the driving operation while confirming the image displayed on the monitor, which leads to safe driving.

  The on-vehicle device is not limited to a drive recorder, and may optionally be a digital tachograph, a panel meter, a car navigation, or the like to which a camera can be connected.

  In the above embodiment, in the normal operation in which the trigger is not generated, the captured image is always recorded, and in the case where the trigger is generated, the captured image is always recorded by the recording camera and the preliminary recording camera. Indicated. As a method for reducing the number of cameras when a trigger occurs, for example, when a trigger occurs, video recording by the recording camera may be stopped at all times, and switching to only video recording by the preliminary recording camera may be performed. As a result, when a trigger occurs, it is possible to record the video from the preliminary recording camera at a high resolution, a high bit rate, a high frame rate, a low compression rate, or no compression without imposing a load on the memory. As a result, the image captured by the preliminary recording camera can be made clear.

  In the above embodiment, the recording operation of the preliminary recording camera is added to the recording operation of the constant recording camera when a trigger occurs. In addition to simply adding, the number of cameras that can be recorded (upper limit number) may be set in advance, and when a trigger occurs, the preliminary recording camera may be operable until the upper limit number is reached. For example, when some of the continuous recording cameras are not operated, the number of preliminary recording cameras may be increased. Thereby, the recording of the captured image by the preliminary recording camera can be increased.

  Moreover, in the said embodiment, although the alarm alerted the driver | operator by sounding an alarm sound from a speaker, you may sound the audio | voice message showing specific attention content instead of an alarm sound. .

  Further, when the video recording operation by the preliminary recording camera is started by the occurrence of the trigger, the video captured by the preliminary recording camera may be displayed on the monitor in real time.

Here, the features of the above-described embodiments of the vehicle-mounted device according to the present invention are summarized and listed in the following [1] to [4], respectively.
[1]
A detection unit (left turn signal switch 43) for detecting a change in the driving state of the vehicle (5);
In addition to recording images picked up by one or more first cameras (always-recording cameras CA1 to CAn) that pick up images around the vehicle when a change in the driving state of the vehicle is detected, the first camera A recording unit (video memory 30, CPU 11) that starts recording video captured by one or more second cameras (preliminary recording cameras RC 1 to RCm) that capture the periphery of the vehicle at a different angle of view;
When a monitoring area (monitoring area DZ) is set around the vehicle, and an object appears in the monitoring area (monitoring area DZ) in an image captured by the second camera (preliminary recording cameras RC1 to RCm), An alarm unit (speaker 22, CPU 11) for outputting an alarm;
A vehicle-mounted device (drive recorder 10) comprising:
[2]
The first camera is a constantly-recording camera (always-recording cameras CA1 to CAn) that captures images that are constantly recorded by the recording unit (image memory 30, CPU 11) when the vehicle (5) is driven.
The second camera is a preliminary recording camera (preliminary recording camera RC1 to RC1) that captures an image recorded by the recording unit (video memory 30, CPU 11) while a change in the driving state of the vehicle (5) is detected. RCm),
The on-vehicle device (drive recorder 10) according to the above [1], characterized in that.
[3]
When the change in the driving state of the vehicle (5) is detected, the recording unit (video memory 30, CPU 11) captures an image with the second camera (preliminary recording cameras RC1 to RCm) corresponding to the change in the driving state. Start recording the recorded video,
The on-vehicle device (drive recorder 10) according to the above [1] or [2].
[4]
The detection unit is a switch (left turn signal switch 43) that detects the operation of the left turn signal.
When the operation of the left turn signal is detected, the recording unit (video memory 30, CPU 11) starts recording of the second camera (preliminary recording cameras RC1 to RCm) that images the left side of the vehicle.
The in-vehicle device (drive recorder 10) according to the above [3], which is characterized in that

  The present invention reduces the blind spot of the recorded video when a change in the driving state of the vehicle is detected in the on-vehicle device, and can alert the driver when there is an object approaching the vehicle, Useful.

5 Vehicle 5y Rear door 5z Side door 10 Drive recorder 11 CPU
12 video processing unit 13 image recognition processing unit 14 program data memory 15 work data memory 16 nonvolatile memory 17 data processing unit 18 card I / F
19 Signal I / F
20 G sensor 21 GPS receiver 22 Speaker 23 Power supply I / F
41 Brake switch 42 Right turn signal switch 43 Left turn signal switch 45 Ignition switch ag1 to ag5 Imaging range bc Bike cc Bicycle CA1 to CAn Continuous recording camera DZ Monitoring area hm Person RC1 to RCm Preliminary recording camera y1 to y3 Arrow

Claims (4)

A detection unit for detecting a change in the driving state of the vehicle;
When a change in the driving state of the vehicle is detected, in addition to recording a video image captured by one or more first cameras that capture the surroundings of the vehicle, the vehicle has an angle of view different from that of the first camera. A recording unit that starts recording of an image captured by one or more second cameras that captures the surroundings;
An alarm unit that sets a monitoring area around the vehicle and outputs an alarm when a target appears in the monitoring area in an image captured by the second camera;
A vehicle-mounted device comprising: The first camera is a continuous recording camera that captures images that are constantly recorded by the recording unit during driving of the vehicle;
The second camera is a preliminary recording camera that captures an image recorded by the recording unit while a change in the driving state of the vehicle is detected.
The on-vehicle device according to claim 1. When the change in the driving state of the vehicle is detected, the recording unit starts recording a video imaged by the second camera corresponding to the change in the driving state.
The vehicle-mounted device according to claim 1 or 2, wherein The detection unit is a switch that detects an operation of the left turn signal,
The recording unit, when an operation of the left turn signal is detected, images the left side of the vehicle, and starts the second camera recording;
The vehicle-mounted device according to claim 3.

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