JP2008101416A - Management system for work site - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To collectively manage the situation required at a site from the outside. <P>SOLUTION: Work machines in a work site comprise: obstacle detection means 10a, 10b for detecting obstacles around the work machines; photographing means 13a, 13b for photographing in the detecting directions of the obstacle detection means 10a, 10b; and an image transmission means 15 for transmitting the photographed images to a management center when the obstacles are detected by the obstacle detection means 10a, 10b. The management center has a monitor for display, an image receiving means for receiving the images transmitted by the image transmission means 15, and a display control means 70 for displaying the received images on the monitor for display when the image receiving means receives the images. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a work site management system for managing a work site.

  Conventionally, a work machine such as a hydraulic excavator detects an obstacle by a proximity sensor, and when an approach of the obstacle is detected, a captured image of a camera provided corresponding to the proximity sensor is displayed in a display monitor in the cab. (For example, see Patent Document 1).

JP 2002-327470 A

  However, since the apparatus described in Patent Document 1 only displays a photographed image of the camera on a display monitor in the driver's cab, there is a need for the site when a plurality of work machines are simultaneously operated in the work site. It is not possible to manage the situation intensively outside.

The present invention is a work site management system having a plurality of work machines operating in the work site and a management center communicating with each work machine, wherein the work machine is an obstacle around the work machine. An obstacle detecting means for detecting the obstacle, an imaging means for photographing the detection direction of the obstacle detecting means, and an image transmitting means for transmitting the photographed image to the management center when the obstacle detecting means detects the obstacle. A display monitor, an image receiving unit that receives an image transmitted by the image transmitting unit, and a display control that displays the received image on the display monitor when the image receiving unit receives the image. Means.
Further, the work machine has a portable terminal carried by a driver, and the work machine includes first alarm request transmission means for transmitting a first alarm request signal to the management center based on a detection result by the obstacle detection means. The management center receives the first warning request signal and the driver specifying means for specifying the driver of the work machine that has transmitted the first warning request signal based on the signal from the portable terminal of the work machine or the driver. Then, a first alarm transmission unit that transmits an alarm signal to the identified driver's portable terminal is provided, and the portable terminal includes an alarm device that operates according to the alarm signal transmitted from the first alarm transmission unit. You can also.
Further, the work machine has a position measuring means for measuring position information of the work machine and a portable terminal carried by a worker at the work site, and the work machine sends a second alarm to the management center based on the detection result by the obstacle detection means. A second alarm request transmitting means for transmitting a request signal, the management center based on the position information of the work machine output from the position measuring means and the position information of the worker output from the portable terminal of the worker, A worker identification means for identifying workers around the work machine that transmitted the second alarm request signal; and a second alarm signal transmitted to the portable terminal of the identified worker upon receipt of the second alarm request signal. The alarm transmitting means may be provided, and the mobile terminal may be provided with an alarm device that is actuated by an alarm signal transmitted from the second alarm transmitting means.
When the work machine includes third alarm request transmission means for transmitting a third alarm request signal to the management center based on the detection result by the obstacle detection means, and the management center receives the third alarm request signal, It is also possible to include a third alarm transmission unit that transmits an alarm signal to the work machine, and the work machine may include an alarm device that is activated by the alarm signal transmitted from the third alarm transmission unit.

  According to the present invention, when an obstacle around the work machine is detected by the obstacle detection means, a captured image corresponding to the obstacle is transmitted to the management center and displayed on the display monitor of the management center. When a plurality of work machines are operated at the same time in the work site, the necessary conditions at the work site can be intensively managed externally.

Hereinafter, an embodiment of a work site management system according to the present invention will be described with reference to FIGS.
FIG. 1 is a perspective view of a hydraulic excavator that is an example of a work machine constituting the management system according to the present embodiment, and FIG. 2 is a plan view. The hydraulic excavator includes an articulated front working machine 1A including a boom 1a, an arm 1b, and a bucket 1c that rotate in a vertical direction, and a vehicle body 1B including an upper swing body 1d and a lower traveling body 1e. The boom 1a, arm 1b, and bucket 1c are driven by the boom cylinder 3a, arm cylinder 3b, and bucket cylinder 3c, respectively.

  A cab 1f is provided at the left front of the upper swing body 1d. The lower traveling body 1e is provided with a pair of left and right side frames that can be expanded and contracted, and a pair of left and right traveling motors 3e. The lower traveling body 1e travels by driving the traveling motor 3e, the side frame expands / contracts by driving the expansion / contraction cylinder, and the upper swing body 1d rotates by driving the swing motor. The rotation angles of the boom 1a, the arm 1b, and the bucket 1c and the rotation angle of the upper swing body 1d are detected by angle detectors 8a to 8d, respectively.

  A GPS receiver 14 is attached to the rear end of the upper swing body 1f, and a radio transceiver 15 is attached to the upper part of the cab 1f. The position information of the work machine can be acquired by a signal from the GPS receiver 14. The right side and the rear side of the upper swing body 1d are directions that are blind spots of the driver's seat, and obstacle detectors 10a and 10b are provided on the right side surface and the rear surface of the upper swing body 1d, respectively. Above the obstacle detectors 10a and 10b, a camera 13a for monitoring the right side of the aircraft and a camera 13b for monitoring the rear are provided.

  The obstacle detectors 10a and 10b are sensors that detect obstacles such as surrounding workers and structures and obtain the position of the obstacle from its distance and direction, and are configured by, for example, a laser radar. The monitoring cameras 13a and 13b are configured by a video camera having an image sensor such as a CCD, for example, and always take a moving image in the detection direction of the obstacle detectors 10a and 10b when the power is turned on. Ranges (monitoring ranges) that can be monitored by the obstacle detectors 10a and 10b are indicated by 12a and 12b in FIG. Alarm ranges 11a and 11b are set in the monitoring ranges 12a and 12b. When there are obstacles in the alarm ranges 11a and 11b, there is a possibility of contact with the work machine, so it is necessary to work with particular care. In this case, as will be described later, an alarm is generated from the work machine and the portable terminal 90 to alert the driver and workers around the work machine.

  FIG. 3 is a diagram showing a configuration of the management system according to the present embodiment. This system includes the above-described hydraulic excavator that operates in the work site, a site monitoring device that monitors the work site, a computer 70 in the management center that manages the operation of the hydraulic excavator in the work site, and a portable that is carried by a worker. The terminal 90 is configured. In the present embodiment, for example, three work machines a to c are operated in the work site. The work machines a to c have the same configuration. The management center is installed in the work site or at a location away from the work site. The management center is provided with a wireless transmitter / receiver, and the computer 70 of the management center communicates with the work machine, the field monitoring device, and the portable terminal 90 via the wireless transmitter / receiver.

  The on-site monitoring device includes a monitoring camera 81, an image storage unit 83 that stores a camera image, and a wireless transceiver 82 that transmits the camera image. The site monitoring device is installed at a high place overlooking the work site. In this embodiment, two on-site monitoring devices a and b are installed at predetermined positions, and the entire work site is monitored by these on-site monitoring devices. The information on the installation locations of the on-site monitoring devices a and b is preset in the computer 70 of the management center. In response to the camera image transmission request from the computer 70, the wireless transceiver 82 transmits the camera image of the image storage unit 83.

  Each worker in the work site carries the portable terminal 90 to work. The portable terminal 90 includes a GPS receiver, a wireless transceiver, and an alarm device. The portable terminal 90 can calculate the position of the worker based on the GPS signal received by the GPS receiver. This position information is transmitted from the portable terminal 90 to the computer 70 in the management center via the wireless transceiver. The alarm device of the mobile terminal 90 is activated by an alarm signal transmitted from the computer 70, and an alarm sound is generated from the mobile terminal 90.

  Each worker is assigned a unique identification ID in advance, and the worker inputs his / her identification ID to the work machine when operating the work machine. The input identification ID is transmitted to the management center computer 70 together with the position information of the work machine via the wireless transceiver 15. Thereby, the computer 70 can manage which worker is operating which work machine. The computer 70 stores the number of the portable terminal 90 corresponding to the worker identification ID in advance as worker information, and the computer 70 can output an alarm signal to the portable terminal 90 of a specific worker.

  A monitoring controller 20 is mounted on the work machine, and an alarm device 40 and a display device 50 are provided in the cab 1f. The alarm device 40 includes, for example, an alarm lamp that is turned on or blinks in response to an alarm signal. Connected to the monitoring controller 20 are in-vehicle cameras 13a and 13b, obstacle detectors 10a and 10b, a GPS receiver 14, a wireless transceiver 15, an alarm device 40, and a display device 50. The monitoring controller 20 includes a position measurement unit 27, an intrusion determination unit 24, a monitoring range pattern storage unit 25, a monitoring history storage unit 26, and a display control unit 22.

  The position measuring unit 27 calculates the absolute position of the work machine from a signal from a GPS satellite obtained via the GPS receiver 14. Then, the position information (own apparatus position information) is transmitted to the computer 70 via the wireless transceiver 15, and the own apparatus position information is output to the monitoring history storage unit 26. The positional relationship between the GPS receiver 14 and the obstacle detectors 10a and 10b is stored in the monitoring controller 20 in advance, and the position measuring unit 27 detects the position information of the GPS receiver 14 and the upper portion detected by the angle detector 8d. Based on the turning angle of the turning body 1d, the absolute positions of the obstacle detectors 10a and 10c are calculated. The absolute positions of the obstacle detectors 10a and 10c are included in the own position information.

  The monitoring pattern storage unit 25 is configured by a nonvolatile memory, a magnetic storage medium, or the like, and stores a monitoring range pattern set around the work machine. Here, the attention ranges 12a and 12b and the alarm ranges 11a and 11b in FIG. 2 are stored as monitoring range patterns.

  The intrusion determination unit 24 reads the monitoring range pattern from the monitoring range pattern storage unit 25. Then, the monitoring range pattern and the obstacle position information detected by the obstacle detectors 10a and 10b are collated, and whether or not the obstacle has entered the caution ranges 12a and 12b or the alarm ranges 11a and 11b. Determine.

  When it is determined that an obstacle has entered the caution area 12a, 12b, the intrusion determination unit 24 turns on the image display of the camera 13a or 13b corresponding to the obstacle detector 10a or 10b that detected the obstacle. A signal is output to the display control unit 22. In addition, the first intrusion occurrence signal is transmitted to the computer 70 via the wireless transceiver 15, and intrusion information described later is written in the monitoring history storage unit 26. When it is determined that the obstacle has entered the alarm ranges 11a and 11b, the intrusion determination unit 24 transmits a second intrusion occurrence signal to the computer 70. Further, an ON signal is output to the alarm device 40, and the alarm device 40 is activated in addition to the above operation.

  Once it is determined that the obstacle has entered the alarm range 11a, 11b or the caution range 12a, 12b, the same operation is performed until the obstacle goes out of the alarm range 11a, 11b or the caution range 12a, 12b. repeat. When the obstacle goes out of the alarm ranges 11a and 11b, the intrusion determination unit 24 outputs an off signal to the alarm device 40, stops the operation of the alarm device 40, and stops transmission of the second intrusion occurrence signal. . When the obstacle goes out of the attention ranges 12a and 12b, the intrusion determination unit 24 outputs a signal to the display control unit 22 so as to turn off the camera image display. In addition, the transmission of the first intrusion occurrence signal is stopped and the writing of the intrusion information to the monitoring history storage unit 26 is stopped.

  The display control unit 22 controls the display on the display device 50 of images taken by the cameras 13a and 13b. In the initial state, the camera image is not displayed on the display device 50, and display / non-display of the camera image is switched by an on / off signal from the intrusion determination unit 24. When the ON signal is output from the intrusion determination unit 24, the camera image is displayed on the display device 50, and the camera image is transmitted to the computer 70 of the management center via the wireless transceiver 15. At the same time, the display control unit 22 writes a snapshot (still image) of the camera image in the monitoring history storage unit 26.

  The monitoring history storage unit 26 is configured by a nonvolatile memory, a magnetic storage medium, or the like, and stores obstacle intrusion information and a camera image snapshot. The stored intrusion information history and snapshot are transmitted to the management center computer 70 via the wireless transceiver 15 at the end of a day's work, for example. An example of intrusion information written in the monitoring history storage unit 26 is shown in FIG. In FIG. 4, the intrusion information is shown in a table format, and one row of the table corresponds to one intrusion information, and the entire table forms an intrusion information history. The intrusion information is added to the end of the table in the order written in the monitoring history storage unit 26.

  As shown in FIG. 4, the intrusion information includes items of “history number”, “date and time”, “position of the intruder”, “position of own device”, and “presence / absence of alarm”. The “position of the own device” and the “position of the intruder” are both absolute positions, and are represented by latitude and longitude, for example. The “own device position” is obtained from the own device position information from the position measurement unit 27. “Intruder position” includes the absolute position information of the obstacle detectors 10a and 10b included in the own position information and the position information of the obstacle detected by the obstacle detectors 10a and 10b, that is, the obstacle detector 10a. , 10b and the relative position information of the obstacle. The “presence / absence of alarm” is represented by “◯” indicating that the alarm is being generated, and “X” indicating that the alarm is not being generated.

  The computer 70 of the management center creates a work site map based on the location information of the work machine transmitted via the wireless transceiver 15 and the location information of the site monitoring device measured in advance, and displays it on the monitor. An example of the work site map is shown in FIG. In FIG. 5, the monitoring ranges of the on-site monitoring devices a and b are indicated by dotted lines, respectively. The working machine in operation (working machines a and b) and the non-working working machine (working machine c) are displayed with distinction between light and dark. The position information of the work machine is transmitted to the computer 70 in real time, and the position of the work machine on the work site map changes in real time. Thereby, the mutual positional relationship of a plurality of work machines can be confirmed on the monitor of the management center.

  When an obstacle enters the caution range 12a, 12b of the work machine, the first intrusion occurrence signal from the intrusion determination unit 24 and the camera image from the display control unit 22 are managed via the wireless transceiver 15. It is transmitted to the center computer 70. When the computer 70 receives the first intrusion occurrence signal, the computer 70 transmits a camera image transmission request signal to the field monitoring apparatus, and receives a camera image captured by the camera 81 of the field monitoring apparatus. The computer 70 displays the camera image from the field monitoring device and the camera image from the work machine on the monitor. An example of the monitor screen in this case is shown in FIG.

  FIG. 6 is an example when the obstacle detector 10b of the work machine a detects that an operator has entered the monitoring range behind the work machine a. In FIG. 6, an image 101 from the camera 13 b corresponding to the obstacle detector 10 b and an image 102 from the site monitoring device a including the work machine a in the monitoring range are displayed side by side on the outside of the work site map. . The mark 103 is attached to the illustration of the work machine a on the work site map, and the work machine a in which the obstacle is detected is highlighted. In addition, when an intruder is detected by other work machines b and c, camera images of the work machines b and c are also displayed on the monitor screen.

  When an obstacle enters the alarm range 11a, 11b of the work machine, a second intrusion occurrence signal from the intrusion determination unit 24 is transmitted to the computer 70 via the wireless transceiver 15. When the computer 70 receives the second intrusion occurrence signal, the computer 70 identifies the operator of the work machine and the workers around the work machine, and transmits an alarm signal to each of the driver and the portable terminal 90 of the worker, Generate an alarm sound.

  The computer 70 manages an intrusion information history for each work machine transmitted via the wireless transceiver 15 in an intrusion information history database. In the management center, by using the intrusion information collected in the intrusion information history database, the number of obstacles intruding into the monitoring range of the work machine, the intrusion time, the movement of obstacles around the work machine, and the like are analyzed. For example, a map of the movement trajectory of the intruder as shown in FIG. 12 is created. In addition, forms such as daily work reports and work instructions are created using the intrusion information collected in the intrusion information history database. Various precautions can be entered in the form based on the intrusion information history, which will be used in the next work.

  The main processing by the management system according to the present embodiment will be described. FIG. 7 is a flowchart illustrating an example of processing in the intrusion determination unit 24 of FIG. This flowchart is started, for example, by turning on an engine key switch of a work machine, and is repeatedly activated at a predetermined cycle.

  In step S101, obstacle position information is acquired by the obstacle detectors 10a and 10b. In step S102, the monitoring range pattern, that is, the attention ranges 12a and 12b and the alarm ranges 11a and 11b in FIG. In step S103, the obstacle position information and the monitoring range pattern are collated, and it is determined whether or not the obstacle has entered the attention ranges 12a and 12b. If it is determined that no obstacle has entered the caution areas 12a and 12b, the process proceeds to step S105. In step S105, an off signal of the camera image is output to the display control unit 22, and the process ends.

  On the other hand, if it is determined in step S103 that an obstacle has entered the caution areas 12a and 12b, the process proceeds to step S104. In step S <b> 104, a camera image ON signal is output to the display control unit 22. In step S <b> 106, the first intrusion occurrence signal is transmitted to the management center computer 70 via the wireless transceiver 15. In step S107, the obstacle position information is compared with the monitoring range pattern to determine whether or not the obstacle has entered the alarm ranges 11a and 11b.

  If it is determined in step S107 that no obstacle has entered the alarm ranges 11a and 11b, the process proceeds to step S110. In step S110, the intrusion information is written in the monitoring history storage unit 26. At this time, write “no alarm”. If it is determined in step S107 that an obstacle has entered the alarm ranges 11a and 11b, the process proceeds to step S108. In step S108, the alarm device 40 of the work machine is activated to turn on or blink the alarm lamp in the cab. In step S109, a second intrusion occurrence signal (alarm request signal) is transmitted to the computer 70 in the management center via the wireless transceiver 15. In step S111, the intrusion information is written in the monitoring history storage unit 26. At this time, a warning is written. Above, the process of the intrusion determination part 24 is complete | finished.

  FIG. 8 is a flowchart showing an example of processing in the display control unit 24 of FIG. In step S201, a signal from the intrusion determination unit 24 is read. In step S <b> 202, it is determined whether or not a camera image ON signal is input from the intrusion determination unit 24. If step S202 is negative, the process proceeds to step S204, the display of the camera image on the display device 50 is turned off, and the process ends.

  If step S202 is affirmed, the process proceeds to step S203, and a camera image is displayed on the display device 50. In step S205, a snapshot of the camera image is written in the monitoring history storage unit 26. In step S206, the camera image is transmitted to the computer 70 in the management center via the wireless transceiver 15, and the process is terminated.

  As a result of the above processing, for example, as shown in FIG. 9, when an operator enters the caution area 12b behind the work machine, an image of the rear camera 13b is displayed on the display device 50 (step S203). Thus, when an obstacle (worker) enters the blind spot of the cab 1f, the driver can recognize the obstacle. At this time, the snapshot 100 of the camera image is stored in the monitoring history storage unit 26 as shown in FIG. 10 (step S205). In this case, if the history number (see FIG. 4) of the intrusion information history is attached to the stored image 100, the association between the intrusion information and the camera image 100 is easy.

  FIG. 11 is a flowchart illustrating an example of processing in the computer 70 of the management center. This flowchart is repeatedly started at a predetermined cycle when the work machine is in operation.

  In step S <b> 301, the position information of the work machine is received from the position measurement unit 27 via the wireless transceiver 15. At this time, the identification ID of the driver who is driving the work machine is also received. In step S302, the position information of the worker is received by a signal from the portable terminal 90 carried by each worker. In step S303, it is determined whether the first intrusion occurrence signal is received from the intrusion determination unit 24. If step S303 is negative, the process proceeds to step S304. In step S304, for example, a work site map as shown in FIG. 5 is displayed on the monitor of the management center.

  On the other hand, if step S303 is positive, the process proceeds to step S305. In step S <b> 305, a camera image corresponding to the first intrusion occurrence signal is received from the display control unit 22 via the wireless transceiver 15. In step S306, it is determined which field monitoring device the work machine is within, and a camera image transmission request signal is transmitted to the corresponding field monitoring device. In step S307, a camera image from the field monitoring apparatus is received. In step S308, the camera image from the work machine and the camera image from the field monitoring device are combined with the work site map, and the camera image as shown in FIG. 6 is displayed on the monitor of the management center, for example.

  In step S309, it is determined whether the second intrusion occurrence signal is received from the intrusion determination unit 24. When step S309 is affirmed, the process proceeds to step S310, and when denied, the process is terminated. In step S <b> 310, the driver is identified from the driver identification ID received in step S <b> 301, and an alarm signal is transmitted to the driver's mobile terminal 90. Thereby, an alarm sound is generated from the portable terminal 90, and the driver can be alerted. The alarm sound may be a buzzer or a predetermined voice message.

  In step S311, a worker around the work machine (a worker excluding the driver) is specified from the worker position information and the work machine position information, and an alarm signal is transmitted to the portable terminal 90 of the worker. . For example, an alarm signal is transmitted to the portable terminal 90 of a worker within a radius of several meters centering on the work machine. A worker in the warning ranges 12a and 12b may be specified, and a warning signal may be transmitted to the portable terminal 90 of the worker. As a result, an alarm sound is generated from the portable terminal 90, and the workers around the work machine can be alerted. When the obstacle detected by the obstacle detectors 10a and 10b is not a worker but a structure, there may be no worker around the work machine. In this case, the process of step S311 is not performed. .

  The operation of the present embodiment is summarized as follows. When the obstacle detectors 10a and 10b do not detect the intrusion of the obstacles into the attention ranges 12a and 12b, the camera image is not displayed on the display device 50 and the camera image is not displayed on the monitor of the management center. In this case, only the work site map is displayed on the monitor of the management center (FIG. 5), and the management center can grasp the mutual positional relationship of a plurality of work machines.

  When the obstacle detectors 10a and 10b detect the intrusion of the obstacles into the attention ranges 12a and 12b, the display device 50 displays images of the cameras 13a and 13b corresponding to the obstacle detectors 10a and 10b. It is displayed (step S104, step S203). Further, the image from the cameras 13a and 13b and the image from the field monitoring device are transmitted to the computer 70 of the management center, and the camera image is synthesized and displayed on the work site map (step S308). As a result, the driver can recognize that there are obstacles in the blind spot of the work machine, and the management center can check in real time what kind of obstacles are around the work machine and concentrate the situation on the site. Can manage.

  When the obstacle detectors 10a and 10b detect the intrusion of the obstacles into the alarm ranges 11a and 11b, the alarm device 40 of the work machine is activated and the alarm lamp is turned on or flashes (step S108). Further, a second intrusion occurrence signal is transmitted from the work machine, and in response thereto, an alarm signal is transmitted from the computer 70 to the driver's portable terminal 90 (step S310). Thereby, an alarm sound is generated from the portable terminal 90, and the driver can recognize the intrusion of the obstacle into the alarm ranges 11a and 11b, and can prevent the driver from working without noticing the obstacle. That is, even if the driver does not notice the lighting of the warning lamp, the driver can notice the warning sound from the mobile terminal 90 and can work safely.

  In this case, an alarm signal is also transmitted from the computer 70 to the portable terminals 90 of workers around the work machine (step S311). Thereby, an alarm sound is generated from the portable terminal 90, and it is possible to notify surrounding workers that the work machine exists in the vicinity (for example, within the alarm ranges 11a and 11b). As a result, it is possible to prevent the worker from performing work without noticing the approach of the work machine.

According to the present embodiment, the following operational effects can be achieved.
(1) When an obstacle is detected by the obstacle detectors 10a and 10b, a camera image is transmitted to the computer 70 together with the first intrusion occurrence signal, and the camera image is displayed on the monitor of the management center. As a result, the intrusion state of obstacles within the monitoring range of the work machine can be centrally managed in real time by the management center. Especially when a plurality of work machines are driven simultaneously in a wide site, it is possible to efficiently manage the necessary situation on the site. In other words, when multiple work machines are driven at the same time in the field, managing the information from the work machines in real time always makes information management complicated, but in this embodiment, an obstacle enters the monitoring range. Since the information from the work machine is managed in real time only when necessary, the necessary information can be easily managed.

(2) When an obstacle is detected in the alarm range 11a, 11b, a second intrusion occurrence signal is transmitted to the management center, and in response to this, an alarm is sent from the management center computer 70 to the driver's portable terminal 90. A signal was sent. As a result, the driver can be alerted and the work can be performed safely.
(3) An alarm lamp is turned on by the alarm device 40, and an alarm sound is generated from the portable terminal 90. In other words, since a double alarm is generated when an obstacle enters the alarm range, the driver can be surely recognized that the alarm has occurred. That is, if the alarm device 40 is configured with an alarm lamp, there is a possibility that an operator may perform an operation without noticing the lighting of the alarm lamp. Since the occurrence can be easily recognized, safety is increased.
(4) The alarm signal is transmitted to the portable terminal 90 of the worker around the work machine from the computer 70 of the management center together with the alarm signal to the driver. As a result, it is possible to alert the workers around the work machine and prevent the work machine from performing work without knowing that it is approaching or approaching the work machine.

  In the above embodiment, when an intrusion of an obstacle is detected, the camera image is displayed on the monitor of the management center as shown in FIG. 6, but for example, an image as shown in FIG. 13 is displayed. The configuration of the computer 70 as the display control means is not limited to that described above. In FIG. 13, images 101, 104, and 105 from the work machines a to c and images 102 and 106 from the work site monitoring devices a and b are displayed together with work site maps, and among these, the image 101 corresponding to the obstacle. , 102 are highlighted. As a result, it is possible to know in detail the on-site situation when an obstacle is detected.

  In the above embodiment, when the second intrusion occurrence signal is transmitted from the work machine, the alarm signal is transmitted from the computer 70 to the mobile terminal 90 of the driver and the workers around the work machine, and the mobile terminal 90 generates an alarm. A sound was generated. Alternatively or additionally, when the second intrusion occurrence signal is transmitted from the work machine, an alarm signal may be transmitted from the computer 70 to the work machine and an alarm sound may be generated from the work machine. .

  In this case, for example, the alarm device 40 is provided with a speaker that generates an alarm sound, the alarm lamp is turned on or blinking by the process (step S108) in the intrusion determination unit 24, and the alarm sound is generated from the speaker by an alarm signal from the computer You may make it make it. Alternatively, instead of turning on the alarm lamp, a low volume alarm sound may be generated from the speaker by processing in the intrusion determination unit 24 and a high volume alarm sound may be generated by the alarm signal from the computer 70. Thus, by outputting a stronger warning to the driver by the warning signal from the computer 70, it is possible to prevent the driver from performing work without noticing the warning, and safety is improved.

  In the above embodiment, when an intruder is detected in the alarm ranges 11a and 11b, the alarm device 40 of the work machine is activated, and a second intrusion occurrence signal is transmitted to the computer 70. Although the alarm sound is generated, the operation timing of the alarm device 40 of the work machine and the alarm device of the portable terminal 90 is not limited to this. For example, an alarm sound may be generated from the mobile terminal 90 when an obstacle further approaches the work machine by a predetermined amount after the operation of the alarm device 40 or when a predetermined time has elapsed. An alarm may be generated only from the mobile terminal 90 without generating an alarm from the alarm device 40.

  Caution areas 12a and 12b and alarm areas 11a and 11b are set around the work machine, a camera image is transmitted when an obstacle enters the attention areas 12a and 12b, and a computer when the alarm area 11a and 11b is entered. The alarm is generated by the alarm signal from 70, but the timing of the transmission of the camera image and the generation of the alarm is not limited to this. For example, the attention ranges 12a and 12b and the alarm ranges 11a and 11b may be set to the same range, and the transmission of the camera image and the alarm generation may be performed at the same timing. That is, when an obstacle enters the caution range 12a, 12b and when it enters the alarm range 11a, 11b, both correspond to the case where an obstacle around the work machine is detected. When such an obstacle around the work machine is detected, any configuration may be used as long as a camera image is transmitted and an alarm is generated by a signal from the computer 70. The location and number of the obstacle detectors 10a and 10b and the cameras 13a and 13b are not limited to those described above, and any configuration of the obstacle detection means and the imaging means may be used.

  In the above embodiment, the alarm signal from the computer 70 generates an alarm sound from the portable terminal 90 of the driver and the portable terminals 90 of the workers around the work machine. Different alarm sounds may be generated, and alarms other than alarm sounds may be output. As the first alarm request signal and the second alarm request signal, a second intrusion occurrence signal is transmitted from the work machine, and in response thereto, an alarm signal is transmitted from the computer 70 of the management center. The first alarm request signal and the second alarm request signal may be transmitted separately. Therefore, the timing at which the alarm signal is transmitted from the computer 70 to the driver's mobile terminal 90 and the timing at which the alarm signal is transmitted to the operator's mobile terminal 90 may not be the same.

  When the second intrusion occurrence signal is transmitted from the work machine to the computer 70 as the third alarm request signal, the alarm device of the work machine may be activated by the alarm signal from the computer 70. In this case, the third alarm request signal may be transmitted simultaneously with the first alarm request signal and the second alarm request signal, or may be transmitted separately. Only one or only two of the first to third alarm request signals may be transmitted, and the alarm generation pattern is not limited to that described above. That is, if the alarm request signal is transmitted based on the detection result of the obstacle in the work machine, the configuration of the monitoring controller 20 as the first alarm request transmission unit to the third alarm request transmission unit is not limited to the above. Absent.

  In the above embodiment, the driver is specified based on the signal from the work machine. However, the driver may be specified based on the signal from the mobile terminal 90, and any configuration of the driver specifying means may be used. Good. Based on the position information signal output from the work machine and the position information signal output from the portable terminal 90, the workers around the work machine are specified. However, the worker specifying means may have any configuration. Good. Therefore, the portable terminal 90 may not be provided with a GPS receiver. Although the position of the device itself is calculated using a signal from a GPS satellite, the position measuring means is not limited to this. The communication is performed via the wireless transceiver of the management center 70, the wireless transceiver 15 of the work machine, and the wireless transceiver of the portable terminal 90. However, any communication form may be used, and an image transmission unit, an image reception unit, The configurations of the first alarm transmitting unit to the third alarm transmitting unit are not limited to those described above.

  In the above, a hydraulic excavator has been described as an example of a work machine that operates at a work site. However, the present invention can be similarly applied to other work machines such as a crawler crane. That is, as long as the features and functions of the present invention can be realized, the present invention is not limited to the work site management system of the embodiment.

The perspective view of the hydraulic shovel which is an example of the working machine which comprises the management system which concerns on embodiment of this invention. The top view of a hydraulic excavator. The figure which shows the structure of the management system which concerns on embodiment of this invention. The figure which shows an example of the intrusion information written in the monitoring history preservation | save part. The figure which shows an example of the work site map displayed on the monitor of a management center. The figure which shows an example of the work site map when an obstruction is detected. The flowchart which shows an example of the process in an intrusion determination part. The flowchart which shows an example of the process in a display control part. The figure for demonstrating operation | movement of the management system which concerns on this Embodiment. The figure which shows the camera image preserve | saved at the monitoring log | history preservation | save part corresponding to the operation | movement of FIG. The flowchart which shows an example of the process in the computer of a management center. The figure which shows an example of the display output in a management center. The figure which shows the modification of FIG.

Explanation of symbols

10a, 10b Obstacle detectors 13a, 13b Camera 15 Radio transceiver 20 Monitoring controller 40 Alarm device 70 Computer 90 Mobile terminal

Claims (4)

A work site management system having a plurality of work machines operating in the work site and a management center communicating with each of the work machines,
The work machine is
Obstacle detection means for detecting obstacles around the work machine;
Photographing means for photographing the detection direction of the obstacle detecting means;
When an obstacle is detected by the obstacle detection means, the image transmission means for transmitting the captured image to the management center,
The management center
A display monitor;
Image receiving means for receiving the image transmitted by the image transmitting means;
When the image receiving means receives an image, the work site management system further comprises display control means for displaying the received image on the display monitor. In the work site management system according to claim 1,
Furthermore, it has a portable terminal that is carried by the operator of the work machine,
The work machine includes first alarm request transmission means for transmitting a first alarm request signal to the management center based on a detection result by the obstacle detection means,
The management center
Based on a signal from the work machine or the driver's portable terminal, a driver specifying means for specifying a driver of the work machine that has transmitted the first alarm request signal;
When receiving the first alarm request signal, the first alarm transmission means for transmitting an alarm signal to the portable terminal of the identified driver,
The work site management system, wherein the portable terminal includes an alarm device that is activated by an alarm signal transmitted from the first alarm transmitter. In the work site management system according to claim 1 or 2,
Furthermore, position measuring means for measuring the position information of the work machine,
A portable terminal carried by a worker at the work site,
The work machine includes second alarm request transmission means for transmitting a second alarm request signal to the management center based on a detection result by the obstacle detection means,
The management center
Based on the position information of the work machine output from the position measuring means and the position information of the worker output from the portable terminal of the worker, the workers around the work machine that transmitted the second alarm request signal are Worker identification means to identify;
When receiving the second alarm request signal, the second alarm transmission means for transmitting an alarm signal to the portable terminal of the specified worker,
The work site management system, wherein the portable terminal includes an alarm device that is activated by an alarm signal transmitted from the second alarm transmitter. In the work site management system according to any one of claims 1 to 3,
The work machine includes third alarm request transmission means for transmitting a third alarm request signal to the management center based on a detection result by the obstacle detection means,
The management center comprises a third alarm transmission means for transmitting an alarm signal to the work machine when the third alarm request signal is received,
The work site management system, wherein the work machine includes an alarm device that operates in response to an alarm signal transmitted from the third alarm transmission means.

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