JP2024139044A - Video recording system and work machine - Google Patents

Abstract

To record videos of a work machine suitable not only for reviewing accidents or near-miss events but also for monitoring for crime prevention purposes or for extracting fault locations.SOLUTION: A video recording system 100 is a video recording system for a work machine 50. The video recording system 100 includes: a camera 22 that is installed on a front work device 5 provided in front of vehicle bodies 3, 4 of the work machine 50; and a video recording device 24 that records a video 33 captured by the camera 22. The camera 22 is installed facing the vehicle bodies 3, 4, and captures a range including the vehicle bodies 3, 4.SELECTED DRAWING: Figure 3

Description

The present invention relates to a video recording system and a work machine equipped with the same.

For the purpose of checking the safety of the work machine and its surroundings, a monitor system has been generally introduced in which multiple cameras are installed on the body of the work machine and the captured images are synthesized to generate an overhead image and displayed on a display etc. In recent years, the images from the cameras installed on the work machine are recorded in a drive recorder, just like in automobiles, and are used later to review accidents or near misses.

Patent Document 1 discloses a technology in which cameras are installed on the left side, right side, and rear of the upper rotating body of a hydraulic excavator, and an overhead image is generated from the images taken by these cameras.

Patent No. 6302624

Images from cameras installed on work machines can also be used for surveillance purposes for crime prevention or to identify malfunctions. In this case, it is important to shoot and record images showing the body of the work machine itself, so that people getting on and off the body of the work machine, people in the driver's cab installed in the body of the work machine, the state of the work machine's engine, or the state of the work machine's exhaust, etc., can be seen.

However, in the technology disclosed in Patent Document 1, the cameras installed on the left side, right side, and rear of the upper rotating body of the hydraulic excavator do not capture the vehicle body itself. An illustration simulating the vehicle body is superimposed on the vehicle body portion in the bird's-eye image disclosed in Patent Document 1. Therefore, with the technology disclosed in Patent Document 1, it is difficult to use the video footage from the cameras installed on the work machine for security monitoring or to identify faulty parts. Installing cameras in all locations that one wishes to view for security monitoring or to identify faulty parts is not realistic due to the limited number of input channels of the drive recorder.

In light of the above, the present invention aims to record video of a work machine that is suitable not only for reviewing accidents or near-miss events, but also for monitoring for crime prevention purposes or for identifying fault locations.

To solve the above problems, the video recording system of the present invention is a video recording system for a work machine, and includes a camera installed on a front working mechanism provided in front of the body of the work machine, and a video recording device that records the video captured by the camera, and is characterized in that the camera is installed facing the body and captures an area including the body.

The present invention makes it possible to record video of a work machine that is suitable not only for reviewing accidents or near-miss events, but also for monitoring for crime prevention purposes or for identifying fault locations.

FIG. 2 is a diagram showing the external configuration of a work machine. FIG. 2 is a diagram showing the installation positions of cameras in the video recording system of the first embodiment. FIG. 1 is a diagram for explaining the arrangement of a video recording system according to a first embodiment. 3A to 3C are diagrams illustrating images recorded by the video recording system of the first embodiment and viewed by a user. FIG. 4 is a diagram illustrating another configuration of the video recording system according to the first embodiment. FIG. 11 is a diagram showing the installation positions of cameras in a video recording system according to a second embodiment. FIG. 11 is a diagram for explaining the configuration of a video recording system according to a second embodiment. 11A to 11C are diagrams for explaining images recorded by the video recording system of the second embodiment and viewed by a user. FIG. 11 is a diagram illustrating another configuration of the video recording system according to the second embodiment.

Embodiments of the present invention will be described below with reference to the drawings. Components with the same reference numerals in each embodiment have the same functions in each embodiment unless otherwise specified, and the description thereof will be omitted.

[Embodiment 1]
1 to 5, a video recording system 100 according to a first embodiment will be described. FIG.

The work machine 50 equipped with the video recording system 100 may be a construction machine such as a hydraulic excavator or a wheel loader. Although a hydraulic excavator is shown in FIG. 1 as an example of the work machine 50, the work machine 50 is not particularly limited as long as the work implement is provided at the front or rear of the vehicle body.

The work machine 50 is equipped with a prime mover 1, which is an engine or an electric motor, and a main pump 2, which is a hydraulic pump driven by the prime mover 1. In the work machine 50, the lower traveling body 3, the upper rotating body 4, and the front working mechanism 5 each operate independently using hydraulic oil supplied from the main pump 2.

The lower traveling body 3 is made up of a pair of traveling bodies 6 (only one side is shown in FIG. 1) and is operated by the rotation of a traveling hydraulic motor 7. The upper rotating body 4 is connected to the upper part of the lower traveling body 3 via a rotating device 8 and is operated by the rotation of a rotating hydraulic motor (not shown).

The front working device 5 is provided in front of the vehicle bodies 3, 4 (lower travel unit 3 and upper rotating unit 4) of the work machine 50. The front working device 5 is mounted on the upper rotating unit 4. The front working device 5 includes a boom 9 rotatably supported on the upper rotating unit 4, a boom cylinder 10 that drives the boom 9, an arm 11 rotatably supported on the boom 9, an arm cylinder 12 that drives the arm 11, a bucket 13 that is an attachment rotatably supported on the arm 11, and a bucket cylinder 14 that drives the bucket 13. Each hydraulic cylinder 10, 12, 14 expands and contracts with hydraulic oil supplied from the main pump 2, and rotates the boom 9, arm 11, and bucket 13 around each of the rotation shafts 15 to 17 as a fulcrum. In this way, the front working device 5 performs work such as excavation or ground leveling.

Figure 2 is a diagram showing the installation positions of cameras 18 to 22 in the video recording system 100 of embodiment 1.

Cameras 18 to 22 are installed on the work machine 50. The cameras 18 to 22 include a rear camera 18, a right camera 19, a left camera 20, a front camera 21, and a boom camera 22.

The rear camera 18 is a camera installed at the rear of the vehicle body 3, 4 (upper rotating body 4 in FIG. 2) facing rearward of the vehicle body 3, 4. The right camera 19 is a camera installed at the right part of the vehicle body 3, 4 (upper rotating body 4 in FIG. 2) facing rightward of the vehicle body 3, 4, such as the right side, lower right, or right side including lower right. The left camera 20 is a camera installed at the left part of the vehicle body 3, 4 (upper rotating body 4 in FIG. 2) facing leftward of the vehicle body 3, 4, such as the left side, lower left, or left side including lower left. The rear camera 18, right camera 19, and left camera 20 are installed to capture images that are the source of synthesis of the overhead image 31 looking down on the work machine 50 from above.

The front camera 21 is a camera installed at the front of the vehicle bodies 3, 4 (upper rotating body 4 in FIG. 2) facing the front working mechanism 5. The front camera 21 captures images in front of the vehicle bodies 3, 4. The front camera 21 captures images of an area including the arm 11 and bucket 13. The front camera 21 is installed to capture images showing the state of work of the front working mechanism 5.

The boom camera 22 is a camera installed on the front working implement 5 facing the vehicle bodies 3, 4. Specifically, the boom camera 22 is installed on the boom 9 facing the vehicle bodies 3, 4. The boom camera 22 is installed at a position on the boom 9 higher than the vehicle bodies 3, 4 in the position shown in FIG. 2 in which the front working implement 5 is held when the work machine 50 is parked (hereinafter also referred to as the "parking position"). For example, the boom camera 22 is installed at the tip of the boom 9, that is, the end of the boom 9 on the arm 11 side. The boom camera 22 captures an area including the vehicle bodies 3, 4. The boom camera 22 is installed to capture an image looking down on the entire vehicle bodies 3, 4 from a high position.

Figure 3 is a diagram illustrating the configuration of the video recording system 100 of embodiment 1.

The video recording system 100 includes cameras 18-22, a video processing device 23 that processes the video captured by at least one of the cameras 18-22, and a video recording device 24 that records the video captured by the cameras 18-22.

The images captured by the rear camera 18, right camera 19, and left camera 20 are input to the image processing device 23. The images captured by the front camera 21 and boom camera 22 are input directly to the image recording device 24. The image processing device 23 synthesizes the images captured by the rear camera 18, right camera 19, and left camera 20 to generate an overhead image 31, which is output to the image recording device 24.

The video recording device 24 records the overhead image 31 generated by the video processing device 23, the image 32 captured by the front camera 21 (hereinafter also referred to as "front camera image 32"), and the image 33 captured by the boom camera 22 (hereinafter also referred to as "boom camera image 33").

The video recording device 24 is equipped with a communication unit 24a that performs wireless communication with an external mobile device 25. The communication unit 24a transmits each of the images 31 to 33 recorded in the video recording device 24 to the mobile device 25. The mobile device 25 displays each of the images 31 to 33 transmitted from the communication unit 24a, allowing users such as a site manager who manages the work site or nearby workers to view them. The communication unit 24a can perform wired or wireless communication with a display in the cab of the work machine 50, and can also display each of the images 31 to 33 recorded in the video recording device 24 on the display, allowing users such as the operator of the work machine 50 to view them.

The video recording device 24 is connected to a communication device 26 of the work machine 50, which communicates wirelessly with an external server 27 via a network. The video recording device 24 outputs each of the videos 31 to 33 recorded in the video recording device 24 to the communication device 26. The communication device 26 transmits each of the videos 31 to 33 output from the video recording device 24 to the server 27 at any timing.

The server 27 stores the images 31-33 from the cameras 18-22 installed on each of the multiple work machines 50. The server 27 is connected to a PC 28 via a network. The PC 28 is located in a remote location away from the work site, and displays the images 31-33 stored in the server 27, allowing a user to view each of the images from a remote location.

Each component of the video recording system 100 is connected to a battery 29, which is the power supply source for the vehicle bodies 3 and 4, and operates with the power supplied from the battery 29. A key switch 30 for starting or stopping the operation of the work machine 50 is provided on the power path 40 from the battery 29 to the vehicle bodies 3 and 4.

The image processing device 23, like the other control devices that control the vehicle bodies 3 and 4, is connected to the power path 40 downstream of the key switch 30. When the key switch 30 is on, the image processing device 23 receives power from the battery 29. The rear camera 18, right camera 19, and left camera 20 are connected to the image processing device 23. When the key switch 30 is on, the rear camera 18, right camera 19, and left camera 20 receive power from the image processing device 23.

The video recording device 24 and the communication device 26 are connected to a power path 40 between the battery 29 and the key switch 30. The video processing device 23 and the communication device 26 receive power from the battery 29 regardless of the on/off state of the key switch 30. The front camera 21 and the boom camera 22 are connected to the video recording device 24. The front camera 21 and the boom camera 22 receive power from the video recording device 24 regardless of the on/off state of the key switch 30.

As a result, the video recording system 100 can operate the boom camera 22 and record the video 33 of the boom camera 22 on the video recording device 24 even when the key switch 30 is in the OFF state. In addition, the video recording system 100 can transmit each of the videos 31 to 33 recorded on the video recording device 24 to at least one of the mobile device 25 and the server 27 even when the key switch 30 is in the OFF state.

Figure 4 is a diagram illustrating images 31 to 33 that are recorded by the video recording system 100 of embodiment 1 and viewed by the user.

As shown in FIG. 4, the images 31 to 33 displayed on at least one of the mobile device 25 and the PC 28 are an overhead image 31 generated by the image processing device 23, a front camera image 32 captured by the front camera 21, and a boom camera image 33 captured by the boom camera 22. The overhead image 31, the front camera image 32, and the boom camera image 33 can be displayed simultaneously on the same screen of the mobile device 25, etc., in synchronization with each other.

The overhead image 31 is used when a user wants to view the surroundings of the vehicle bodies 3, 4 from a bird's-eye view. For example, the overhead image 31 is suitable for an operator to check the safety of the surroundings of the vehicle bodies 3, 4 while working. For example, the overhead image 31 is suitable for an on-site manager to review accidents or near-miss events. An illustration A simulating the vehicle bodies 3, 4 is synthesized in the center of the overhead image 31.

The front camera image 32 is used when the user wants to view the state of the front working implement 5, in particular the state of the arm 11 and the bucket 13. For example, the front camera image 32 is suitable for use by a site manager or the like to check the progress of work.

The boom camera video 33 is a video of the entire vehicle body 3, 4 viewed from a high place, and is used when a user wants to view the entire vehicle body 3, 4. For example, the boom camera video 33, like the bird's-eye view video 31, is suitable for use by a site manager to review an accident or near-miss event. For example, the boom camera video 33 is suitable for use by a site manager to monitor people getting on or off the vehicle body 3, 4, people in the driver's cab of the vehicle body 3, 4, the state of the prime mover 1, or the state of the exhaust of the work machine 50. In other words, the boom camera video 33 is suitable for use by a site manager to monitor the vehicle body 3, 4 for crime prevention or to extract a faulty part. In particular, since the boom camera 22, the video recording device 24, and the communication device 26 can be operated regardless of the on/off state of the key switch 30, the boom camera video 33 can be recorded and viewed even when the work machine 50 is parked. Therefore, the boom camera image 33 is particularly suitable for monitoring the vehicles 3 and 4 while they are parked for crime prevention purposes.

Figure 5 is a diagram illustrating another configuration of the video recording system 100 of embodiment 1.

In the video recording system 100 shown in FIG. 3, the rear camera 18, right camera 19, and left camera 20 receive power from the video processing device 23. The front camera 21 and boom camera 22 receive power from the video recording device 24.

However, in the video recording system 100 of embodiment 1, as shown in FIG. 5, the rear camera 18, right camera 19, left camera 20, and front camera 21 may be connected in parallel to the video processing device 23 to a power path 40 downstream of the key switch 30 and may receive power from the battery 29. The boom camera 22 may be connected in parallel to the video recording device 24 and communication device 26 to a power path 40 between the battery 29 and the key switch 30 and may receive power from the battery 29.

As described above, the video recording system 100 of the first embodiment is a video recording system for a work machine 50. The video recording system 100 includes a camera 22 installed on a front work mechanism 5 provided in front of the vehicle bodies 3, 4 of the work machine 50, and a video recording device 24 that records video 33 captured by the camera 22. The camera 22 is installed facing the vehicle bodies 3, 4, and captures an area including the vehicle bodies 3, 4.

As a result, the video recording system 100 can capture and record video 33 showing the entire vehicle body 3, 4, without having to install cameras in all locations that one wishes to view for crime prevention monitoring or to identify faulty locations. Therefore, the video recording system 100 allows a user, such as a site manager, to view video 33 showing people getting on or off the vehicle body 3, 4, people in the driver's cab provided in the vehicle body 3, 4, the state of the prime mover 1, or the state of the exhaust of the work machine 50. Therefore, the video recording system 100 can record video 33 of the work machine 50 that is suitable not only for reviewing accidents or near-miss events, but also for crime prevention monitoring or to identify faulty locations.

Furthermore, in the video recording system 100 of the first embodiment, the front working implement 5 includes a boom 9 rotatably supported on the vehicle bodies 3 and 4, an arm 11 rotatably supported on the boom 9, and a bucket 13 which is an attachment rotatably supported on the arm 11. The camera 22 is a boom camera 22 installed on the boom 9.

In this way, the video recording system 100 can capture and record video 33 of the entire vehicle body 3, 4 looking down from a high position in the parking position, since the camera 22 is installed on the boom 9 that is positioned higher than the vehicle body 3, 4 in the parking position. In addition, since the camera 22 is installed at a high position in the video recording system 100, it is difficult to harm the camera 22 by vandalism or the like. Furthermore, the video recording system 100 can easily adjust the orientation of the camera 22 relative to the vehicle body 3, 4 by adjusting the rotation angle of the boom 9 relative to the vehicle body 3, 4, so that the video recording system 100 can easily capture and record video 33 of the desired shooting range. Furthermore, the video recording system 100 can reduce the displacement of the camera 22 relative to the vehicle body 3, 4 compared to when it is installed on the arm 11 or bucket 13, so that it can capture and record stable video 33 without significantly changing the shooting range.

The video recording system 100 of the first embodiment further includes a rear camera 18 installed at the rear of the vehicle body 3, 4 facing the rear of the vehicle body 3, 4, a right camera 19 installed at the right part of the vehicle body 3, 4 facing the right side of the vehicle body 3, 4, a left camera 20 installed at the left part of the vehicle body 3, 4 facing the left side of the vehicle body 3, 4, a front camera 21 installed at the front part of the vehicle body 3, 4 facing the front working mechanism 5, and a video processing device 23 that processes the captured images. The video processing device 23 synthesizes the images captured by the rear camera 18, the right camera 19, and the left camera 20 to generate an overhead image 31. The video recording device 24 records the overhead image 31 generated by the video processing device 23, the front camera image 32 captured by the front camera 21, and the boom camera image 33 captured by the boom camera 22.

As a result, the video recording system 100 can capture and record not only the overhead video 31 suitable for reviewing an accident or near-miss event, but also the front camera video 32 suitable for checking work progress and the boom camera video 33 suitable for monitoring for crime prevention purposes or for extracting faulty parts. Therefore, the video recording system 100 can record not only the video 31 of the work machine 50 suitable for reviewing an accident or near-miss event, and the video 33 of the work machine 50 suitable for monitoring for crime prevention purposes or for extracting faulty parts, but also the video 32 of the work machine 50 suitable for checking work progress, according to purpose.

Furthermore, in the video recording system 100 of the first embodiment, the work machine 50 includes a battery 29 that is a power supply source for the vehicle bodies 3 and 4, and a key switch 30 provided on a power path 40 from the battery 29 to the vehicle bodies 3 and 4. The boom camera 22 and the video recording device 24 are connected to the power path 40 between the battery 29 and the key switch 30, and receive power from the battery 29 regardless of the on/off state of the key switch 30.

As a result, the video recording system 100 can operate the boom camera 22 and the video recording device 24 regardless of the on/off state of the key switch 30. Therefore, the video recording system 100 can capture and record the boom camera video 33 captured by the boom camera 22 even when the work machine 50 is parked. Therefore, the video recording system 100 can record video 33 of the work machine 50 that is particularly suitable for use in monitoring the vehicle bodies 3, 4 when parked for crime prevention purposes, as well as for reviewing accidents or near-miss events.

Furthermore, in the video recording system 100 of the first embodiment, the work machine 50 is equipped with a communication device 26 that performs wireless communication with an external server 27 via a network. The communication device 26 is connected to a power path 40 between a battery 29 and a key switch 30, and receives power from the battery 29 regardless of the on/off state of the key switch 30. The video recording device 24 outputs the recorded videos 31 to 33 to the communication device 26, which transmits them to the server 27.

This allows the video recording system 100 to operate the communication device 26 regardless of the on/off state of the key switch 30. Therefore, the video recording system 100 can transmit the videos 31-33 recorded in the video recording device 24 to the server 27 even when the work machine 50 is parked. Therefore, the video recording system 100 can make the videos 31-33 recorded in the video recording device 24 viewable on a PC 28 in a remote location.

Furthermore, in the video recording system 100 of the first embodiment, the video recording device 24 includes a communication unit 24a that performs wireless communication with an external mobile device 25. The communication unit 24a transmits the recorded videos 31 to 33 to the mobile device 25.

As a result, the video recording system 100 can transmit the videos 31 to 33 recorded in the video recording device 24 to the mobile device 25 even when the work machine 50 is parked, regardless of the on/off state of the key switch 30. Therefore, the video recording system 100 can make the videos 31 to 33 recorded in the video recording device 24 viewable at any desired location, including the work site.

The work machine 50 of the first embodiment is a work machine equipped with a video recording system 100. The video recording system 100 includes a camera 22 installed on a front work mechanism 5 provided in front of the vehicle bodies 3, 4 of the work machine 50, and a video recording device 24 that records video 33 captured by the camera 22. The camera 22 is installed facing the vehicle bodies 3, 4, and captures an area including the vehicle bodies 3, 4.

This allows the work machine 50 to record video 33 of the work machine 50 that is suitable not only for reviewing accidents or near-miss events, but also for monitoring for crime prevention purposes or for identifying fault locations.

[Embodiment 2]
The video recording system 100 of the second embodiment will be described with reference to Figures 6 to 9. In the video recording system 100 of the second embodiment, the description of the same configuration and operation as in the first embodiment will be omitted.

In the video recording system 100 of the first embodiment, the boom 9 on which the boom camera 22 is installed may appear in the boom camera image 33, and the back side of the boom 9 may be a blind spot. In the video recording system 100 of the second embodiment, multiple boom cameras 22 are installed to eliminate this blind spot.

Figure 6 shows the installation positions of cameras 18 to 22b in the video recording system 100 of embodiment 2.

The boom camera 22 may be composed of multiple boom cameras 22a, 22b installed on either side of the boom 9 in a direction intersecting the axis of the boom 9. For example, one of the multiple boom cameras 22a, 22b may be installed on the left side of the boom 9, and the other may be installed on the right side of the boom 9. For example, one of the multiple boom cameras 22a, 22b may be installed on the top surface of the boom 9, and the other may be installed on the bottom surface of the boom 9.

In the example of FIG. 6, one boom camera 22a is installed on the top surface of the boom 9, and the other boom camera 22b is installed on the bottom surface of the boom 9. In this case, the lower range of the image 33 captured by the boom camera 22a is a blind spot because the boom 9 is reflected in the image. The upper range of the image 33 captured by the boom camera 22b is a blind spot because the boom 9 is reflected in the image.

Figure 7 is a diagram illustrating the configuration of the video recording system 100 of the second embodiment. In Figure 7, the key switch 30 is not illustrated. Figure 8 is a diagram illustrating the images 31, 32, and 36 that are recorded by the video recording system 100 of the second embodiment and viewed by the user.

Each image 33 captured by the multiple boom cameras 22a, 22b is input to the image processing device 23, similar to the images captured by the rear camera 18, right camera 19, and left camera 20.

The image processing device 23 of the second embodiment generates not only the overhead image 31 but also the complementary image 36. Specifically, the image processing device 23 of the second embodiment complements the blind spot of the image 33 of one boom camera 22a, in which the vehicle bodies 3 and 4 are not captured due to the reflection of the boom 9, with the image 33 of the other boom camera 22b, to generate the complementary image 36 in which the boom 9 is not captured. The image processing device 23 of the second embodiment outputs the overhead image 31 to the image recording device 24 via a signal line 34, and outputs the complementary image 36 to the image recording device 24 via a signal line 35 that is separate from the signal line 34.

The video recording device 24 of embodiment 2 records the overhead image 31 and the complementary image 36 generated by the video processing device 23, as well as the forward camera image 32 captured by the forward camera 21.

As a result, the video recording system 100 of embodiment 2 can eliminate the blind spot of the boom 9 captured in the boom camera image 33 and record a complementary image 36 in which the entire actual vehicle bodies 3, 4 are clearly captured. Therefore, the video recording system 100 of embodiment 2 can record a clear image 36 of the work machine 50 that is more suitable not only for reviewing accidents or near-miss events, but also for monitoring for crime prevention purposes or for extracting fault locations.

In the video recording system 100 of the second embodiment, similarly to the first embodiment, the video processing device 23, the video recording device 24, and the communication device 26 may be connected to the battery 29 without going through the key switch 30, as shown in FIG. 7, so that they can receive power from the battery 29 regardless of the on/off state of the key switch 30.

In the video recording system 100 of the second embodiment, the multiple boom cameras 22a, 22b may be configured as stereo cameras. The video processing device 23 of the second embodiment has an image recognition function including an image processing function such as stereo matching. As shown in FIG. 8, the video processing device 23 of the second embodiment can compare each video 33 captured by the multiple boom cameras 22a, 22b and detect the vehicle bodies 3, 4 and objects 37 present in the vicinity thereof from each video 33.

The video processing device 23 of the second embodiment associates information about the detected object 37 with the complementary image 36. The information about the object 37 is information such as the type, size, and position (including the distance to the object 37) of the object 37. Furthermore, the video processing device 23 of the second embodiment draws a mark 38 that highlights the detected object 37 on the complementary image 36. Then, the video processing device 23 of the second embodiment outputs the complementary image 36 on which the mark 38 has been drawn to the video recording device 24. The video recording device 24 of the second embodiment records the complementary image 36 on which the mark 38 has been drawn.

As a result, the video recording system 100 of embodiment 2 can automatically detect the object 37, and can process and record the supplementary video 36 in a format that makes it easy for the user to understand the detected object 37. Therefore, the video recording system 100 of embodiment 2 can record clear supplementary video 36 that is more suitable not only for reviewing accidents or near-miss events, but also for monitoring for crime prevention purposes or for extracting fault locations.

Figure 9 is a diagram illustrating another configuration of the video recording system 100 of embodiment 2. In Figure 9, the key switch 30 is not shown.

In the video recording system 100 shown in FIG. 7, multiple boom cameras 22a, 22b were connected to a video processing device 23 to which a rear camera 18, a right camera 19, and a left camera 20 were connected. The supplementary video 36 was generated by the video processing device 23, which generated an overhead video 31.

However, in the video recording system 100 of the second embodiment, as shown in FIG. 9, the video processing device 23 may be composed of a first video processing device 231 connected to the rear camera 18, the right camera 19, and the left camera 20, and a second video processing device 232 connected to multiple boom cameras 22a, 22b. The first video processing device 231 synthesizes the images captured by the rear camera 18, the right camera 19, and the left camera 20 to generate an overhead image 31. The second video processing device 232 synthesizes the images captured by the multiple boom cameras 22a, 22b to generate a complementary image 36.

In this way, the video recording system 100 of the second embodiment can configure the second video processing device 232 and cameras 22a and 22b that generate the complementary video 36 as a separate system from the first video processing device 231 and cameras 18 to 20 that generate the overhead video 31. Therefore, the video recording system 100 of the second embodiment can process each video 33 captured by the cameras 22a and 22b and each video captured by the cameras 18 to 20 in parallel to generate the complementary video 36 and the overhead video 31. Therefore, the video recording system 100 of the second embodiment can quickly generate and record clear video 36 that is suitable not only for reviewing accidents or near-miss events, but also for monitoring for crime prevention purposes or for extracting fault locations.

In the video recording system 100 of the second embodiment, only the second video processing device 232 that generates the complementary video 36, the cameras 22a and 22b, the video recording device 24, and the communication device 26 may be connected to the battery 29 without going through the key switch 30.

As a result, the video recording system 100 of embodiment 2 can generate and record the supplementary video 36 even when the work machine 50 is parked, and transmit it to at least one of the mobile device 25 and the server 27. Therefore, the video recording system 100 of embodiment 2 can record clear video 36 of the work machine 50 that is particularly suitable for use in monitoring the vehicle bodies 3, 4 while parked for crime prevention purposes, as well as for reviewing accidents or near-miss events, and can make the video available to the user even when parked.

In addition, the video recording system 100 in the first and second embodiments is mounted on the work machine 50. However, a part of the video recording system 100 does not have to be mounted on the work machine 50. For example, the video processing device 23 may be mounted on the server 27.

Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above embodiments, and various modifications can be made without departing from the spirit of the present invention described in the claims. The present invention allows the configuration of one embodiment to be added to the configuration of another embodiment, the configuration of one embodiment to be replaced with another embodiment, or part of the configuration of one embodiment to be deleted.

3, 4...Vehicle body, 5...Front working device, 9...Boom, 11...Arm, 13...Bucket, 18...Rear camera, 19...Right camera, 20...Left camera, 21...Front camera, 22, 22a, 22b...Boom camera, 23...Image processing device, 231...First image processing device, 232...Second image processing device, 24...Image recording device, 24a...Communication unit, 25...Mobile device, 26...Communication device, 27...Server, 28...PC, 29...Battery, 30...Key switch, 31...Overhead image, 32...Front camera image, 33...Boom camera image, 36...Complementary image, 37...Object, 38...Mark, 40...Power path

Claims (10)

A video recording system for a work machine, comprising:
a camera installed on a front working mechanism provided at the front of a body of the work machine;
a video recording device that records the video captured by the camera;
The video recording system, wherein the camera is installed facing the vehicle body and captures an area including the vehicle body. the front working mechanism includes a boom rotatably supported on the vehicle body, an arm rotatably supported on the boom, and an attachment rotatably supported on the arm,
The video recording system according to claim 1 , wherein the camera is a boom camera mounted on the boom. A rear camera installed at a rear portion of the vehicle body facing toward the rear of the vehicle body;
A right camera installed on a right part of the vehicle body facing toward the right of the vehicle body;
A left camera installed on a left part of the vehicle body facing toward the left of the vehicle body;
a front camera installed at a front part of the vehicle body facing the front working implement;
A video processing device that processes the captured video,
the image processing device generates an overhead image by synthesizing the images captured by the rear camera, the right camera, and the left camera;
3. The video recording system according to claim 2, wherein the video recording device records the overhead video generated by the video processing device, the video captured by the front camera, and the video captured by the boom camera. The boom camera is configured by a plurality of boom cameras installed on either side of the boom in a direction intersecting the axis of the boom,
the image processing device complements a blind spot range of an image of one of the boom cameras, in which the vehicle body is not captured due to the boom being captured, with an image of the other boom camera to generate a complemented image in which the boom is not captured;
The video recording system according to claim 3 , wherein the video recording device records the complemented video generated by the video processing device. the image processing device detects an object from each image captured by the plurality of boom cameras, and draws a mark emphasizing the detected object on the complementary image;
The video recording system according to claim 4 , wherein the video recording device records the complemented video on which the mark is drawn. the image processing device is configured by a first image processing device connected to the rear camera, the right camera, and the left camera, and a second image processing device connected to the plurality of boom cameras;
The first image processing device generates the overhead image;
The video recording system according to claim 4 , wherein the second video processing device generates the complementary video. the work machine includes a battery that is a power supply source for the vehicle body, and a key switch provided on an electric power path from the battery to the vehicle body,
The video recording system according to claim 3, characterized in that the boom camera and the video recording device are connected to the power path between the battery and the key switch, and receive power from the battery regardless of the on/off state of the key switch. The work machine is equipped with a communication device that performs wireless communication with an external server via a network,
the communication device is connected to the power path between the battery and the key switch, and receives power from the battery regardless of an on/off state of the key switch;
8. The video recording system according to claim 7, wherein the video recording device outputs the recorded video to the communication device for transmission to the server. the video recording device includes a communication unit that performs wireless communication with an external mobile device;
8. The video recording system according to claim 7, wherein the communication unit transmits the recorded video to the mobile device regardless of whether the key switch is on or off. A work machine equipped with the video recording system described in claim 1.

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