JP2020060037A - Monitoring system and monitoring method for construction site - Google Patents

Abstract

To monitor a construction site with a reduced cost.SOLUTION: A monitoring system for construction sites includes a plurality of alarm terminals 12 that a plurality of workers hold, data acquisition means 20 that acquires predetermined data, monitoring determination means 26 that is connected to the data acquisition means 20 one-on-one, and transmitting and receiving means 30 for performing wireless communication. The plurality of alarm terminals 12 and the monitoring determination means 26 that is connected to the transmitting and receiving means 30 perform multi hop type wireless communication. The monitoring determination means 26 determines whether an alarm need to be raised based on the predetermined data that is acquired by the data acquisition means 20 to which the monitoring determination means is connected, and transmits an alarm command when determining that an alarm is required. Each of the plurality of alarm terminals 12 raises an alarm to workers when receiving a unique alarm command. Because of this simple configuration, it is possible to reduce the cost overall, and by using multi hop type wireless communication, it is possible to always perform stable communication.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a monitoring system and a monitoring method for a construction site where a plurality of workers are engaged.

  At a construction site such as construction work, it is necessary to ensure the safety of workers by, for example, preventing contact between construction machines and workers and approach between construction machines. Therefore, various systems for monitoring the construction site have been developed for the purpose of further improving the safety of workers (see, for example, Patent Documents 1 and 2).

JP, 2010-16582, A JP, 2010-117882, A

However, the above-described system tends to be a large-scale system because the measuring device and the alarm device are integrated and constructed, so that the configuration is complicated and the introduction cost is high.
The present invention has been made in view of the above problems, and an object of the present invention is to monitor a construction site while suppressing costs.

(Aspect of the invention)
The following aspects of the invention exemplify the constitution of the present invention, and are explained separately for each item in order to facilitate understanding of various constitutions of the present invention. Each section does not limit the technical scope of the present invention, while referring to the best mode for carrying out the invention, a part of the constituent elements of each section is replaced, deleted, or further The addition of the constituent elements of (5) is also included in the technical scope of the present invention.

  (1) A construction site monitoring system in which a plurality of workers are engaged, carried by each of the plurality of workers, provided with a transmitter / receiver unit for performing wireless communication, and provided with different identification codes. A plurality of alarm terminals, at least one data acquisition means for acquiring predetermined data on the construction site and / or its periphery, and at least one monitoring determination means connected to the at least one data acquisition means in a one-to-one relationship. And a transmitting / receiving unit for performing wireless communication, which is connected to one of the at least one monitoring determining unit, and the monitoring determining unit to which the plurality of alarm terminals and the transmitting / receiving unit are connected, Multi-hop wireless communication is performed by using the monitoring determination unit as a master station and the plurality of alarm terminals as slave stations, and the at least one monitoring determination unit is a connection destination. The necessity of reporting is determined based on the predetermined data acquired by the data acquisition means, and when it is determined that the reporting is necessary, the identification code is assigned in accordance with the reason for determining that the reporting is necessary. A specific alerting command including, or a simultaneous alerting command not including the identification code, is transmitted via the monitoring determination means to which the transmission / reception means is connected, and the plurality of alarm terminals are assigned to each of them. A construction site monitoring system for issuing a warning to a worker carrying the alarm terminal when the specific notification command including an identification code that matches the identification code or the broadcast notification command is received. (Claim 1).

  The construction site monitoring system described in this section is intended for a construction site in which a plurality of workers are engaged, and includes a plurality of alarm terminals, at least one data acquisition unit, at least one monitoring determination unit, and It includes transmitting and receiving means. The plurality of alarm terminals is carried by each of a plurality of workers engaged in the construction site, and includes a transmission / reception unit for performing wireless communication. Further, the plurality of alarm terminals are provided with identification codes different from each other, and these identification codes are used to distinguish between the alarm terminals, and each of the alarm terminals holds the identification code provided to itself. There is. The at least one data acquisition means acquires predetermined data at the construction site and / or its surroundings. Such predetermined data includes, for example, image data captured by a camera and various sensors. It includes the acquired measurement data.

  At least one monitoring determination unit is connected to at least one data acquisition unit on a one-to-one basis, and this monitoring system includes the same number of data acquisition units and monitoring determination units. The transmission / reception unit is connected to one of the at least one monitoring determination unit, which allows the monitoring determination unit of the connection destination to perform wireless communication via the transmission / reception unit. In this way, one monitoring determination unit to which the transmission / reception unit is connected and a plurality of alarm terminals each including a transmission / reception unit are multi-hops in which the monitoring determination unit is a master station and the plurality of alarm terminals are slave stations. Type wireless communication. That is, a plurality of alarm terminals play a role of a repeater to establish a communication path through all the alarm terminals in an order according to the situation, and a bucket relay system is provided between the monitoring determination unit and the plurality of alarm terminals. Wireless communication is performed.

  In addition, at least one monitoring determination unit determines the necessity of reporting based on predetermined data such as image data and measurement data acquired by the data acquisition unit of the connection destination. The criteria for the determination at this time is arbitrarily set according to the type of predetermined data that is the determination material. Then, when it is determined that the alert is necessary, the at least one monitoring determination unit determines whether the alert is necessary (for example, a predetermined data type or the like), and issues a specific alert command or a simultaneous alert command. Is transmitted via the monitoring determination means to which the transmission / reception means is connected. Here, the specific notification command includes an identification code used for discrimination of the alarm terminal, targets the alarm terminal to which an identification code that matches the identification code is given, and the simultaneous notification command is It does not include an identification code and targets all alarm terminals for which a communication path from the transmitting / receiving means is established.

  Then, the plurality of alarm terminals issue a specific alarm command including an identification code that matches the identification code assigned to each, directly from the monitoring determination means to which the transmission / reception means is connected, or via another alarm terminal. When it is indirectly received, a warning is given to a worker carrying this alarm terminal by, for example, issuing a warning sound. Further, the plurality of alarm terminals issue an alarm to the worker carrying each alarm terminal even when receiving the simultaneous alarm command from the monitoring determination means or other alarm terminals. As a result, of the plurality of workers carrying the alarm terminal, a specific worker or all workers are alerted by the notification. In this way, an alarm terminal that uses multi-hop wireless communication to send and receive a notification command that is a trigger to execute a notification requires a strong radio wave to receive directly from the master station, etc. In many cases, it is smaller, more power-saving, and cheaper than a terminal using wireless communication of the method.

  Moreover, the construction site monitoring system described in this section has a simple configuration including the same number of data acquisition means and monitoring determination means and one transmission / reception means in addition to the plurality of alarm terminals as described above. Therefore, the total cost is suppressed. Further, by using the multi-hop type wireless communication while suppressing the cost, an appropriate communication route according to the situation can be secured at any time, and stable communication is always performed. That is, even for an alarm terminal carried by a worker who is working in a place that cannot be directly transmitted from the transmitting / receiving means, such as a place far away from the transmitting / receiving means or a place obstructed by a wall made of steel, etc. By sending and receiving via the alarm terminal carried by another worker who is working in another place, the report command is transmitted without any problem.

(2) In the above item (1), the plurality of alarm terminals and the monitoring determination unit to which the transmission / reception unit is connected perform a ZigBee (registered trademark) standard communication as the multi-hop wireless communication. Monitoring system (claim 2).
The construction site monitoring system described in this section performs ZigBee standard communication as multi-hop wireless communication that is executed by a monitoring determination unit to which a transmission / reception unit is connected and a plurality of alarm terminals. A module that performs ZigBee communication is particularly inexpensive among modules that perform multi-hop wireless communication. Therefore, by using such a module as an alarm terminal or a transmission / reception means, the cost of the entire system can be further suppressed. It is something. Moreover, the ZigBee standard communication consumes less power and can be covered by the power of a small battery, so that the alarm terminal can be made smaller and lighter.

(3) In the above items (1) and (2), the at least one data acquisition unit photographs a part of the construction site and / or the surroundings of the construction site, and uses the image data as the predetermined data. A monitoring system at a construction site, which includes an image capturing unit for acquiring, and the monitoring determination unit connected to the image capturing unit determines the necessity of reporting based on an image captured by the image capturing unit at the connection destination (claim) 3).
The construction site monitoring system according to this section, as at least one data acquisition means, photographs a part of the construction site and / or the surroundings of the construction site, and uses the photographed image data as predetermined data. It includes a photographing means for acquiring. The photographing means may be installed, for example, so as to photograph a part of the work at the construction site, or when the construction site is on the water, so as to photograph waves and the like around the construction site. . Then, the monitoring determination unit connected to such an image capturing unit determines the necessity of reporting based on the image captured by the image capturing unit of the connection destination. That is, for example, it was predicted that a large wave would come from the image data of the work at the construction site, when an event for which a warning was to be confirmed was confirmed, or from the image data of the waves around the construction site. In some cases, it is determined that notification is required. As described above, by determining the necessity of reporting based on the image data, the reporting is performed at appropriate timing for various situations that may occur at the construction site.

  (4) In the above item (3), the identification code and the identification are further included, which are provided at positions visible from the outside of the worn articles of the plurality of workers and which are different between the workers. The mark is associated with the worker carrying the alarm terminal and wearing the worn article in a one-to-one manner, and the photographing means photographs a part of the construction site. However, the monitoring determination means connected to the image capturing means determines, based on the image captured by the image capturing means at the connection destination, the necessity of issuing an alarm to the worker captured in the image, When the information is determined to be necessary, the identification mark provided on the worn article of the worker who is determined to be required to be read, and the identification including the identification code tied to the read identification mark Supervision of the construction site that sends a notification command System (claim 4).

  The construction site monitoring system described in this section further includes an identification mark provided at a position visible from the outside of the worn articles of a plurality of workers, and these identification marks are used for distinguishing workers from each other. As used, they are different among workers. Then, the identification mark provided on the worn article of the worker and the identification code given to each of the alarm terminals are paired with the worker carrying the alarm terminal and wearing the worn article as a common item. It is tied with 1. This linking relationship is grasped in advance by at least the monitoring determination means connected to the photographing means.

  The photographing means is installed so as to photograph a part of the construction site where the work by the construction machine or the like is being performed, and the monitoring determination means connected to this photographing means depends on the photographing means of the connection destination. Based on the captured image, the necessity of issuing a warning to the worker shown in the image is determined. That is, the monitoring determination means determines whether or not a condition should be issued, for example, when the construction machine and the worker are close to each other, based on the image data obtained by photographing the work state of the construction machine. judge. Then, when it is determined that the alarm should be issued and it is determined that the alarm is required for the worker imaged in the image, the monitoring determination means is the worn article of the worker determined to be alarmed. The identification mark provided on the image is read from the image.

  Subsequently, the monitoring determination means identifies the identification code associated with the identification mark read from the image based on the association of the identification code and the identification mark, which is grasped in advance, and identifies the identified identification code. Send a specific notification command that includes. Then, this specific notification command is transmitted from the transmission / reception unit connected to the monitoring determination unit, and reaches the alarm terminal carried by the worker shown in the above image through the communication path established in advance. To do. This alarm terminal issues an alarm when the specific alarm command is received because the identification code included in the received specific alarm command matches the identification code given to the alarm terminal itself. This will promptly notify workers who have been required to be notified by the monitoring judgment means, so that the occurrence of events such as contact between workers and construction machinery can be reliably avoided. It is what is done.

(5) In the above item (4), the photographing means is a crane camera attached to a sheave provided at the tip of the boom of the crane so as to photograph the vertically downward direction. ).
In the construction site monitoring system described in this section, a crane camera is used as a photographing means for photographing a part of the construction site, and this crane camera is provided at the tip of the boom of the crane used at the construction site. It is attached to the sheave so as to shoot vertically downward. Therefore, the image captured by the crane camera shows a state around the suspended load that is lifted by the crane. Based on this image, the monitoring determination means connected to the crane camera determines whether or not there is a risk of contact between the suspended load and the worker, and when it is determined that there is a risk of contact, the crane The specific notification command is transmitted by targeting the worker imaged in the image captured by the camera. As a result, occurrence of various events in crane work, such as contact between a suspended load and a worker, is reliably avoided.

(6) The construction system monitoring system according to (4) or (5) above, wherein the worn article is a helmet (claim 6).
In the construction site monitoring system described in this section, when the worn article provided with the identification mark is a helmet worn by a worker at the construction site, for example, the crane camera described in (5) above. In addition, when the photographing means photographs the construction site from above, the identification mark provided on the helmet can be easily reflected in the image photographed by the photographing means. Further, if the identification mark is provided in the vicinity of the zenith of the helmet, the identification mark is more easily photographed, and the accuracy of reading the identification mark by the monitoring determination means is improved.

(7) The construction site monitoring system according to any one of (4) to (6), wherein the identification mark is a colored or color barcode applied to at least a part of the worn article (claim 7).
In the construction site monitoring system described in this section, the identification mark is a colored or color barcode applied to at least a part of the worn article. When the part or the whole is colored, and in the case of a color barcode, it is provided at a position where it can be easily photographed by the photographing means and in a size that can be recognized by the monitoring determination means. As a result, the accuracy of reading the identification mark by the monitoring determination means is improved.

(8) In the above items (3) to (7), the at least one data acquisition unit includes a plurality of the image capturing units, and a plurality of the monitoring determination units according to the plurality of image capturing units. The plurality of photographing means are installed so as to photograph from different angles and / or different positions, and the plurality of monitoring determination means connected to the plurality of photographing means are connected to the respective photographing means. A construction site monitoring system for individually determining the necessity of alerting based on the captured image (claim 8).
The construction site monitoring system according to this item includes at least one data acquisition unit including a plurality of image capturing units installed so as to capture images from different angles and / or different positions. Further, in response to this, the present monitoring system includes a plurality of monitoring determination means in the number corresponding to the plurality of imaging means. In such a configuration, a plurality of sets of the photographing means and the monitoring determination means that are connected to each other are formed, and one of the plurality of monitoring determination means included in these groups or other than the photographing means. When the data acquisition means is included, the transmission / reception means is connected to one of the monitoring determination means connected to the data acquisition means.

  Then, the plurality of monitoring determination units connected to the plurality of image capturing units individually determine the necessity of reporting based on the images captured by the image capturing units connected to the respective image capturing units. Furthermore, as a result of these determinations, even if it is determined by any of the monitoring determination means that the notification is necessary, the monitoring determination means that determines that the notification is necessary is transmitted via the monitoring determination means to which the transmitting / receiving means is connected. , A specific notification command or a simultaneous notification command is transmitted. Thus, even when a specific work on the construction site is monitored from a plurality of different angles, or when a plurality of works on the construction site are simultaneously monitored, a compact configuration using one transmitting / receiving means can be used. .

(9) In the above items (1) to (8), the at least one monitoring determination unit assigns a different reason code to the specific notification command and the simultaneous notification command, depending on the reason for determining that the notification is necessary. The buzzer, which includes the above-mentioned warning codes included in the specific alerting command or the simultaneous alerting command received, when the alarm terminals issue alerts from each of them. A construction site monitoring system that switches the sound to issue an alarm (claim 9).
In the construction site monitoring system described in this section, when at least one of the monitoring determination means transmits a report command, a reason code that is different for each reason that report is determined to be necessary, a specific report command, and a simultaneous notification are issued. Include it in the report command and send it. Then, the plurality of alarm terminals receives the specific report command including the identification code that matches the identification code assigned to each alarm command or the simultaneous alert command The buzzer sound to be output is switched according to the reason code included in the alarm issuing command or the simultaneous alarm issuing command to issue an alarm. As a result, various cautions are urged to the plurality of workers carrying the alarm terminal, depending on the reason why the monitoring determination means determines that the alarm is necessary.

  (10) A method of monitoring a construction site in which a plurality of workers are engaged, comprising: a transmitter / receiver unit for performing wireless communication; and a plurality of alarm terminals to which different identification codes are attached, And at least one data acquisition means for acquiring predetermined data of a construction site and / or its periphery, and at least one monitoring determination means connected to the at least one data acquisition means in a one-to-one correspondence, A transmitting / receiving means for performing wireless communication, which is connected to at least one of the monitoring determining means, and the monitoring determining means to which the plurality of alarm terminals and the transmitting / receiving means are connected, The monitoring / judging means is caused to execute multi-hop wireless communication using the master station and the plurality of alarm terminals as slave stations, and the at least one monitoring / judging means performs the data acquisition of the connection destination. Based on the predetermined data acquired by the means, it is determined whether or not the notification is necessary, and when it is determined that the notification is necessary, a specific notification including the identification code is issued according to the reason that the notification is determined to be necessary. A broadcast command or a simultaneous broadcast command not including the identification code is transmitted via the monitoring determination means to which the transmission / reception means is connected, and the plurality of alarm terminals are provided with the identification code assigned to each. In the case of receiving the specific notification command including the matching identification code or the simultaneous notification command, the received alarm terminal is used to issue an alarm to the worker carrying the alarm terminal. Monitoring method (claim 10).

  (11) As the at least one data acquisition means, a photographing means for photographing a part of the construction site and / or the periphery of the construction site and acquiring image data as the predetermined data is installed, and the photographing is performed. A method for monitoring a construction site (claim 11), wherein the monitoring determination means connected to the means determines the necessity of reporting based on the image taken by the imaging means at the connection destination (claim 11).

(12) Identification marks that are different from each other are provided on the wearable articles of the plurality of workers at positions visible from the outside, and the identification code and the identification mark are carried by the alarm terminal and With the worker wearing the worn item as a common item, it is tied in a one-to-one manner, the photographing means photographs a part of the construction site, and the monitoring determination means connected to the photographing means Based on the image captured by the image capturing means at the connection destination, it is determined whether or not the worker who is captured in the image needs to be alerted, and when it is determined that alerting is required, it is determined that alerting is required. 12. The specific notification command including the identification code attached to the read identification mark, which is provided on the worn article of the worker, is transmitted. Method of monitoring construction site Claim 12).
The construction site monitoring method according to (10) to (12) is executed by the construction site monitoring system according to the above (1), (3), and (4), and thus the above (1) is performed. , (3) and (4) have the same effects as the construction site monitoring system.

  Since the present invention is configured as described above, it is possible to monitor the construction site while suppressing costs.

It is a block diagram which shows an example of a structure of the monitoring system of the construction site which concerns on embodiment of this invention. It is a communication image figure of the multi-hop type wireless communication by the monitoring system of the construction site which concerns on embodiment of this invention. It is an image figure which shows an example of the construction site to which the construction site monitoring system which concerns on embodiment of this invention was applied. It is an image figure which shows the example different from FIG. 3 of the construction site to which the construction site monitoring system which concerns on embodiment of this invention was applied.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the accompanying drawings. Here, detailed description of the same parts as or corresponding parts to those of the prior art will be omitted, and the same parts or corresponding parts are denoted by the same reference symbols throughout the drawings.
FIG. 1 shows an example of the configuration of a construction site monitoring system 10 according to an embodiment of the present invention. As shown in the figure, the construction site monitoring system 10 according to the embodiment of the present invention is provided in a plurality of alarm terminals 12 carried by a worker W engaged in a construction site and a worn article 34 of the worker W. And an identification mark 36, at least one data acquisition unit 20, at least one data monitoring determination unit 26, and a transmission / reception unit 30. Although FIG. 1 illustrates three workers W1 to W3 as the plurality of workers W, the number of workers W may be less than or more than three.

  Each of the plurality of alarm terminals 12 has a transmission / reception unit 14 for performing multi-hop wireless communication (communication of ZigBee standard in this embodiment) together with a monitoring determination unit 26 to which a transmission / reception unit 30 is connected as described later. This multi-hop wireless communication will be described later. Further, each of the plurality of alarm terminals 12 is provided with an identification code 16 different from each other, and the identification between the alarm terminals 12 is performed by these identification codes 16. Further, the plurality of alarm terminals 12 are provided to the worker W carrying each alarm terminal 12 when receiving a warning command transmitted from the monitoring determination means 26 via the transmission / reception means 30 as described later. It has a function to issue an alert. Examples of the notification method include generation of sound such as buzzer sound and generation of vibration. As such an alarm terminal 12, various terminals that are operated by a battery or a rechargeable battery, which have a function of issuing a sound and the like and a function of transmitting and receiving a multi-hop type wireless communication, are used. In FIG. 1, three alarm terminals 12A to 12C are illustrated as the plurality of alarm terminals 12 corresponding to the three workers W1 to W3, and the transmission / reception unit 14 also includes three alarm terminals 14A to 14C. The identification code 16 is also shown as 16A to 16C.

  The worn article 34 is worn by the worker W, and examples thereof include a helmet. The identification mark 36 is provided at a position visible from the outside of the worn article 34, is different between the workers W, and is used when distinguishing the workers W from each other. For example, as the identification mark 36, a part or the whole of the worn article 34 is colored in different colors among the workers W, a color barcode is provided, and a black-and-white pattern similar to the control point used in the drone survey is provided. It is realized by things. FIG. 1 illustrates three identification marks 36A to 36C provided on the three worn articles 34A to 34C corresponding to the three workers W1 to W3. Further, the identification mark 36 is tied in a one-to-one correspondence with the identification code 16 given to the alarm terminal 12 and the worker W carrying the alarm terminal 12 and wearing the worn article 34 as a common item. There is. That is, in the example of FIG. 1, the worker W1 is a common item, and the identification code 16A and the identification mark 34A are tied in a one-to-one manner, and the worker W2 is a common item and the identification code 16B and the identification mark 34B are a common item. The identification code 16C and the identification mark 34C are associated with each other in a one-to-one correspondence with the worker W3 as a common item.

  The at least one data acquisition unit 20 acquires predetermined data of the construction site and its surroundings. For example, a photographing unit for photographing image data as the predetermined data and a sensor for measuring various data as the predetermined data. Etc. are used. At least one data acquisition unit 20 is connected to at least one monitoring determination unit 26 on a one-to-one basis, and the predetermined data acquired by the data acquisition unit 20 is transmitted to the connection determination monitoring determination unit 26. . In the present embodiment, as one data acquisition unit 20, an image capturing unit 22 that captures an image of the worker W working at a part of the construction site is included. Various cameras capable of capturing an image can be used as the capturing unit 22.

  At least one monitoring determination unit 26 includes the same number as the data acquisition unit 20, that is, one monitoring determination unit 26 is included in the present embodiment, and is connected to the data acquisition unit 20 on a one-to-one basis as described above. There is. Further, one of the at least one monitoring determination means 26 (in this embodiment, one monitoring determination means 26 shown in FIG. 1) is connected to the transmitting / receiving means 30 for performing wireless communication. Then, the plurality of alarm terminals 12 described above and the monitoring determination unit 26 to which the transmission / reception unit 30 is connected perform multi-hop wireless communication using the monitoring determination unit 26 as a master station and the plurality of alarm terminals 12 as slave stations. In this embodiment, wireless communication of ZigBee standard conforming to IEEE802.15.4 is performed.

  Here, FIG. 2 schematically shows an image of performing the above-described multi-hop type wireless communication, and four alarm terminals 12A to 12D are illustrated as the plurality of alarm terminals 12. The wireless communication of the multi-hop type will be briefly described with reference to FIG. 2. The monitoring determination unit 26 to which the transmission / reception unit 30 is connected and the four alarm terminals 12A to 12D are bidirectional in a so-called bucket relay system. Wireless communication is possible. That is, in the example of FIG. 2, the information transmitted from the transmitting / receiving unit 30 is first received by the alarm terminal 12A, and further transmitted by the alarm terminal 12A to the alarm terminal 12B. Subsequently, the information received by the alarm terminal 12B is transmitted from the alarm terminal 12B to the alarm terminal 12C, and further transmitted from the alarm terminal 12C to the alarm terminal 12D. Such a bucket relay type communication path is established after the power-on state of each alarm terminal 12 is picked up at a predetermined timing by the monitoring determination means 26 serving as a master station, and is included in the network at the same time. The information (the identification code 16 and the like) of the alarm terminal 12 that should be operated and the number of the alarm terminals 12 that are operating are grasped. The communication network as shown in FIG. 2 is assumed to be used within a range of, for example, several hundred meters.

  Furthermore, at least one monitoring determination unit 26 transmits the following information by using the multi-hop type wireless communication as described above. That is, the necessity of reporting is determined based on the predetermined data acquired by the data acquisition means 20 of the connection destination, and when it is determined that the notification is necessary, depending on the reason why the notification is determined to be necessary, The specific notification command or the simultaneous notification command is transmitted via the monitoring determination unit 26 to which the transmission / reception unit 30 is connected. Here, the specific notification command includes the identification code 16 given to the alarm terminal 12 carried by the target worker W for the specific worker W, and the simultaneous notification command is As shown in FIG. 2, the identification code 16 is not included for all the workers W who carry the alarm terminal 12 having a communication path established with the monitoring determination means 26.

  Further, more specifically in accordance with the embodiment of FIG. 1, the monitoring determination unit 26, based on the image captured by the image capturing unit 22 of the connection destination, with respect to the worker W captured in this image. Determine the need for notification. Then, when it is determined that the notification is necessary, the identification mark 36 provided on the worn article 34 of the worker W for which the notification is determined to be necessary is read, and the identification code 16 associated with the read identification mark 36 is read. Is specified and the specific notification command including the specified identification code 16 is transmitted. The monitoring determination unit 26 is constructed by using various computers, and the transmission / reception unit 30 uses a transmission / reception module compatible with the multi-hop type wireless communication standard to be used. The notification command transmitted as described above is used as follows. That is, when the plurality of alarm terminals 12 receive the specific notification command including the identification code 16 that matches the identification code 16 assigned to each of them, or when the simultaneous notification command is received, each of the alarm terminals 12 is received. A warning is issued to the worker W carrying 12 pieces.

  Subsequently, FIGS. 3 and 4 show examples of construction sites to which the construction site monitoring system 10 according to the embodiment of the present invention is applied. First, referring to FIG. 3, an example applied to a construction site for manufacturing caisson is shown. In this construction site, the caisson 50 is manufactured in the floating dock 52 provided near the breakwater 56. A crane 40 is installed in the floating dock 52 at a position higher than 20 m above the deck, and the crane 40 is used to lift the material 58 on the breakwater 56 and to hang the suspended load 48 at the caisson 50. Has been done. Further, a scaffold 54 made of steel is assembled around the caisson 50, and a plurality of workers W are working on or inside the scaffold 54. For convenience of illustration, FIG. 3 illustrates only the workers W1 on the breakwater 56 and the workers W2 and W3 inside the scaffold 54 as the plurality of workers W. Further, in the state of FIG. 3, the entire caisson 50 is hatched, but the caisson 50 has a space filled with the filling material.

  In the construction site as described above, each component of the construction site monitoring system 10 according to the embodiment of the present invention is installed as follows. That is, referring also to FIG. 1, the alarm terminal 12 is carried by each worker W, and the identification mark 36 provided on the worn article 34 is provided on the helmet worn by each worker W. There is. Further, as the photographing means 22 included in the data acquisition means 20, the crane camera 22 is attached to the sheave 44 provided at the tip of the boom 42 of the crane 40 so as to face vertically downward. In FIG. 3, the photographing range R by the crane camera 22 is shown in a colored manner. Further, the monitoring determination means 26 and the transmission / reception means 30 connected thereto are installed in the operator room 46 of the crane 40.

  Then, in the embodiment of FIG. 3, the worker W is detected by the monitoring determination unit 26 from the image captured by the crane camera 22 serving as the image capturing unit 22, which captures an image around the suspended load 48 of the crane 40. In the state of FIG. 3, the worker W2 may be reflected in the image captured by the crane camera 22 and the worker W2 may come into contact with the suspended load 48, so it is determined that the alarm to the worker W2 is necessary. Further, the monitoring determination means 26 identifies the worker W2 from the identification mark 36 provided on the helmet worn by the worker W2, and specifies the alarm terminal 12B carried by the worker W2. The warning command is transmitted to the worker W2 from the alarm terminal 12B.

  Here, in the example of FIG. 3, among the workers W1 to W3 shown in the figure, the workers W1 and W2 are the workers W1 and W2 from the transmitting / receiving means 30 installed in the operator room 46 of the crane 40. I am working at a position where I can directly communicate with the alarm terminals 12A and 12B I am carrying. On the other hand, the worker W3 is blocked by the steel scaffold 54, and the transmitter / receiver 30 installed in the operator room 46 directly communicates with the alarm terminal 12C carried by the worker W3. You are working in a position where you may not be able to do it. The alarm terminal 12C at such a position is not directly transmitted from the transmitting / receiving means 30 of the operator room 46, but is passed through another alarm terminal 12 (alarm terminal 12B carried by the worker W2, etc.). Then, each notification command is transmitted.

  Next, referring to FIG. 4, there is shown an example applied to a construction site of breakwater caisson construction (installation) work. FIG. 4A is a bird's-eye view, and FIG. 4B is an operator room 62 of the hoist ship 60. It is a landscape map from. At this construction site, the wave breaking block 70 is installed from the inside of the breakwater 68 by the crane 40 of the hoist ship 60. The wave-dissipating block 70 is hoisted through a wire 72 that is hoisted from a sheave 44 provided at the tip of the boom 42 of the crane 40. In this installation work, the operator P in the operator room 62 of the hoist ship 60 operates the crane 40 in response to the signal from the worker W1 as the crane operation conductor at the top 68a of the breakwater 68. At this time, the operator P in the operator room 62 directly visually recognizes the worker W2 as a slinging worker and the wave-dissipating block 70 as the hanging load 48, which are located below the top end 68a of the breakwater 68. I can't.

  In the construction site as described above, each component of the construction site monitoring system 10 according to the embodiment of the present invention is installed as follows, similar to the example of FIG. That is, referring also to FIG. 1, the alarm terminal 12 is carried by each worker W, and the identification mark 36 provided on the worn article 34 is provided on the helmet worn by each worker W. There is. Further, as the photographing means 22 included in the data acquisition means 20, the crane camera 22 is attached to the sheave 44 provided at the tip of the boom 42 of the crane 40 so as to face vertically downward. Further, the monitoring determination means 26 and the transmission / reception means 30 connected thereto are installed in the operator room 62 of the hoist ship 60. In addition, the operator room 62 is provided with a display 64 for displaying an image taken by the crane camera 22.

  In the embodiment of FIG. 4, the worker who approaches the suspended load 48 by the monitoring determination unit 26 from the image captured by the crane camera 22 as the capturing unit 22 that captures the periphery of the suspended load 48 of the crane 40. Detect W2. Further, the monitoring determination means 26 identifies the worker W2 from the identification mark 36 provided on the helmet worn by the worker W2, and specifies the alarm terminal 12B carried by the worker W2. The warning command is transmitted to the worker W2 from the alarm terminal 12B. At this time, the worker W2 may be blocked by the breakwater 68, and communication may not be directly performed from the transmitting / receiving means 30 installed in the operator room 62 to the alarm terminal 12B carried by the worker W2. You are working in a certain position. Therefore, a warning command is transmitted to the alarm terminal 12B via the alarm terminal 12A carried by the worker W1.

  By the way, according to the embodiment of the present invention having the above-mentioned configuration, the following operational effects can be obtained. That is, as shown in FIG. 1, the construction site monitoring system 10 according to the embodiment of the present invention is intended for a construction site in which a plurality of workers W are engaged, and a plurality of alarm terminals 12, at least. It includes one data acquisition unit 20, at least one monitoring determination unit 26, and a transmission / reception unit 30. The plurality of alarm terminals 12 are carried by each of a plurality of workers W engaged in the construction site, and include a transmission / reception unit 14 for performing wireless communication. Further, the plurality of alarm terminals 12 are provided with different identification codes 16, and the identification codes 16 are used to discriminate between the alarm terminals 12, and at the same time, the identifications given to the respective alarm terminals 12 themselves. The reference numeral 16 is held. The at least one data acquisition unit 20 acquires predetermined data of the construction site and / or its surroundings, and such predetermined data is photographed by the photographing unit 22 of FIGS. 2 to 4, for example. Image data etc. are included.

  At least one monitoring determination unit 26 is connected to at least one data acquisition unit 20 on a one-to-one basis, and the monitoring system 10 includes the same number of data acquisition units 20 and monitoring determination units 26. It will be. The transmission / reception unit 30 is connected to one of the at least one monitoring determination unit 26, which enables the monitoring determination unit 26 of the connection destination to perform wireless communication via the transmission / reception unit 30. In this way, one monitoring determination unit 26 to which the transmission / reception unit 30 is connected and a plurality of alarm terminals 12 each including the transmission / reception unit 14 are the monitoring determination unit 26 as a master station and a plurality of alarm terminals 12 as slaves. Performs multi-hop wireless communication with a station. That is, as shown in FIG. 2, the plurality of alarm terminals 12 play the role of a repeater, whereby communication paths passing through all the alarm terminals 12 are established in an order according to the situation, and the monitoring determination unit 26 and a plurality of communication terminals are provided. Bucket relay wireless communication is performed with the alarm terminal 12.

  In addition, at least one monitoring determination unit 26 determines the necessity of reporting based on predetermined data such as image data acquired by the data acquisition unit 20 of the connection destination. At this time, the criteria for the determination can be set arbitrarily according to the type of predetermined data that is the determination material. Then, when it is determined that the alert is necessary, the at least one monitoring determining unit 26 determines whether the alert is necessary (for example, a predetermined data type) and issues a specific alert command or a simultaneous alert. The command is transmitted via the monitoring determination unit 26 to which the transmission / reception unit 30 is connected. Here, the specific notification command includes the identification code 16 used for the discrimination of the alarm terminal 12, and targets the alarm terminal 12 to which the identification code 16 that matches the identification code 16 is given as a target. The report command does not include the identification code 16, and targets all the alarm terminals 12 to which the communication path from the transmitting / receiving means 30 has been established.

  Then, the plurality of alarm terminals 12 issue a specific notification command including the identification code 16 that matches the identification code 16 assigned to each, directly from the monitoring determination means 26 to which the transmission / reception means 30 is connected, or another. When it is indirectly received via the alarm terminal 12, the worker W carrying the alarm terminal 12 is notified by, for example, issuing a warning sound. Further, the plurality of alarm terminals 12 issue an alarm to the worker W carrying each alarm terminal 12 even when receiving a simultaneous alert command from the monitoring determination means 26 or other alarm terminals 12. . Accordingly, it is possible to call attention to the specific worker W or all the workers W among the plurality of workers W carrying the alarm terminal 12 by issuing a report. As described above, the alarm terminal 12 that uses the multi-hop wireless communication for transmitting and receiving the report command that is the trigger for executing the report requires a strong radio wave to directly receive from the master station. It is often smaller, more power-saving, and less expensive than terminals that use other types of wireless communication.

  Moreover, in the construction site monitoring system 10 according to the embodiment of the present invention, in addition to the plurality of alarm terminals 12 as described above, the same number of data acquisition means 20 and monitoring determination means 26 and one transmission / reception means 30 are provided. Since it has a simple configuration including and, the overall cost can be suppressed. Further, by using the multi-hop type wireless communication while suppressing the cost, it is possible to always secure an appropriate communication route according to the situation, and it is possible to always perform stable communication. That is, the worker W (for example, the work shown in FIG. 3) who is working in a place far from the transmission / reception unit 30 such as a place far away from the transmission / reception unit 30 or a place obstructed by a wall made of steel. The alarm terminal 12 carried by the worker W3 or the worker W2 in FIG. 4 is also transmitted / received via the alarm terminal 12 carried by another worker W working in another place. In this way, it is possible to send the notification command without any problem.

  Further, the construction site monitoring system 10 according to the embodiment of the present invention uses the ZigBee standard as a multi-hop wireless communication executed by the monitoring determination unit 26 to which the transmission / reception unit 30 is connected and the plurality of alarm terminals 12. Communication. A module that performs ZigBee standard communication is particularly inexpensive among modules that perform multi-hop wireless communication. Therefore, by using such a module for the alarm terminal 12 and the transmitting / receiving means 30, the cost of the entire system 10 is reduced. It can be suppressed more. Moreover, since the ZigBee standard communication consumes less power and can be covered by the power of a small battery, the alarm terminal 12 can be made smaller and lighter.

  Furthermore, the construction site monitoring system 10 according to the embodiment of the present invention, as at least one data acquisition unit 20, photographs a part of the construction site and / or the surroundings of the construction site, and photographs this. It includes a photographing means 22 for acquiring image data as predetermined data. The image capturing means 22 may be installed so as to capture an image of a part of the work at the construction site, as in the example of FIGS. 3 and 4. Then, the monitoring determination unit 26 connected to such an image capturing unit 22 determines the necessity of reporting based on the image captured by the image capturing unit 22 of the connection destination. That is, for example, when it is confirmed from the image data obtained by photographing the state of work at the construction site that an event for which a report should be issued is confirmed, it is determined that the report is required. In this way, by determining the necessity of reporting based on the image data, it is possible to issue the reporting at appropriate timing for various situations that are expected to occur at the construction site.

  In addition, as shown in FIG. 1, the construction site monitoring system 10 according to the embodiment of the present invention further includes an identification mark provided at a position visible from the outside of the worn articles 34 of the plurality of workers W. 36, these identification marks 36 are different among the workers W so that they can be used to distinguish the workers W from each other. Then, the identification mark 36 provided on the worn article 34 of the worker W and the identification code 16 given to each of the alarm terminals 12 are the worker who carries the alert terminal 12 and wears the worn article 34. W is a common item and is associated with one-to-one. This linking relationship has been grasped in advance by at least the monitoring determination means 26 connected to the photographing means 22.

  As shown in the examples of FIGS. 3 and 4, the photographing means 22 is installed so as to photograph a part of the construction site where the work by the construction machine or the like is performed, and the photographing means 22 is connected to the photographing means 22. The monitoring determination unit 26 thus determined determines, based on the image captured by the image capturing unit 22 of the connection destination, the necessity of issuing an alarm to the worker W captured in the image. That is, the monitoring determination unit 26 determines whether or not to be in a situation where a warning should be issued, for example, when the construction machine and the worker W are close to each other, based on the image data obtained by photographing the work state of the construction machine or the like. To determine. Then, when it is determined that the alarm should be issued and it is determined that the alarm is required for the worker W shown in the image, the monitoring determination unit 26 determines that the worker W determined that the alarm is required. The identification mark 36 provided on the worn article 34 is read from the image.

  Subsequently, the monitoring determination unit 26 specifies the identification code 16 associated with the identification mark 36 read from the image, based on the association relationship between the identification code 16 and the identification mark 36, which is known in advance. The specific notification command including the specified identification code 16 is transmitted. Then, this specific notification command is transmitted from the transmission / reception unit 30 connected to the monitoring determination unit 26, passes through the communication path established in advance, and is the alarm carried by the worker W shown in the above image. It reaches the terminal 12. Since the identification code 16 included in the received specific alerting instruction matches the identification code 16 assigned to the alerting terminal 12 itself, the alarm terminal 12 issues an alert when the specific alerting instruction is received. Do the news. As a result, since it is possible to promptly issue an alarm to the worker W for whom it has been determined that the alarm determination is necessary by the monitoring determination unit 26, it is possible to ensure that an event such as a contact between the worker W and the construction machine occurs. It is possible to avoid it.

  Further, in the construction site monitoring system 10 according to the embodiment of the present invention, as shown in FIGS. 3 and 4, the photographing means 22 for photographing a part of the construction site may be a crane camera 22. The crane camera 22 is attached to a sheave 44 provided at the tip of a boom 42 of a crane 40 used at a construction site so as to capture a vertically downward direction. Therefore, in the image captured by the crane camera 22, a state around the suspended load 48 that is lifted by the crane 40 is shown. Based on this image, the monitoring determination means 26 connected to the crane camera 22 determines whether there is a risk of contact between the suspended load 48 and the worker W, and determines that there is a risk of contact. In this case, the specific warning command is transmitted by targeting the worker W (for example, the worker W2 in FIG. 3 or the worker W2 in FIG. 4) shown in the image captured by the crane camera 22. As a result, it is possible to reliably avoid the occurrence of various events in the crane work, such as contact between the suspended load 48 and the worker W.

Further, in the construction site monitoring system 10 according to the embodiment of the present invention, the wearing article 34 provided with the identification mark 36 is a helmet worn by the worker W at the construction site, and, for example, FIG. When the photographing means 22 photographs the construction site from above like the crane camera 22 shown in FIG. 4, the identification mark 36 provided on the helmet is easily photographed in the image photographed by the photographing means 22. be able to. Further, if the identification mark 36 is provided near the zenith of the helmet, the identification mark 36 can be more easily photographed, and the accuracy of reading the identification mark 36 by the monitoring determination means 26 can be improved.
Moreover, the identification mark 36 is a colored or color barcode applied to at least a part of the worn article 34. In the case of coloring, a part or the whole of the worn article 34 is colored depending on the worn article 34. In the case of a color bar code, the color barcode is provided at a position where it can be easily photographed by the photographing means 22 and in a size that can be recognized by the monitoring determination means 26. This makes it possible to further improve the reading accuracy of the identification mark 36 by the monitoring determination unit 26.

  Here, the construction site monitoring system 10 according to the embodiment of the present invention is not limited to the configuration shown in FIGS. 1 to 4, and may have another configuration. For example, in the construction site monitoring system 10 according to the embodiment of the present invention, a plurality of image capturing means in which at least one data acquisition means 20 is installed to capture images from different angles and / or different positions. 22 may be included. Further, in this case, the monitoring system 10 includes a plurality of monitoring determination means 26 in the number corresponding to the plurality of image capturing means 22. In such a configuration, a plurality of sets of the photographing means 22 and the monitoring determination means 26 connected to each other are formed, and one of the plurality of monitoring determination means 26 included in these groups, or the photographing means 22. When the data acquisition means 20 is included in addition to the above, the transmission / reception means 30 is connected to one of the monitoring determination means 26 connected to the data acquisition means 20.

  Then, the plurality of monitoring determination units 26 connected to the plurality of image capturing units 22 individually determine the necessity of reporting based on the images captured by the image capturing units 22 connected to each. Further, as a result of these determinations, no matter which of the monitoring determination means 26 determines that the notification is necessary, the monitoring determination means 26 that determines that the notification is necessary is connected to the transmission / reception means 30 by the monitoring determination means. A specific notification command or a simultaneous notification command is transmitted via 26. Thereby, even when a specific work on the construction site is monitored from a plurality of different angles, or when a plurality of works on the construction site are simultaneously monitored, it is possible to deal with the compact configuration using one transmitting / receiving means 30. It will be possible.

  Further, the construction site monitoring system 10 according to the embodiment of the present invention may include one or more data acquisition means 20 different from the imaging means 22. Such data acquisition means 20 includes various sensors that acquire measurement data as predetermined data. For example, as the data acquisition unit 20, a sensor that measures temperature, humidity, or the like is installed, and when those measured values exceed a predetermined value set in advance, or after a predetermined time has elapsed after exceeding the predetermined value, or the like, A warning may be issued to a specific worker W or all workers W to prompt a break for the countermeasure against heat stroke. Furthermore, in order to simply notify that the specific measurement data exceeds the predetermined value, the alarm may be issued at the timing when the measurement data exceeds the predetermined value. Even in the case of such a configuration, the number of data acquisition means 20 with or without the image capturing means 22 and the monitoring determination means 26 of the same quantity are included, and one of them includes the transmission means 30. Connected.

  Further, in the construction site monitoring system 10 according to the embodiment of the present invention, when at least one monitoring determination unit 26 transmits a report command, a different reason code is generated for each reason that report is determined to be necessary, It may be transmitted by being included in the specific notification command and the simultaneous notification command. For example, as the data acquisition unit 20, the above-described sensor for measuring the temperature and the crane camera 22 as shown in FIGS. 3 and 4 are installed, and the monitoring determination unit 26 connected to the sensor serves as the transmission source. The alarm issuing command and the alarm issuing command which is the transmission source of the monitoring determination means 26 connected to the crane camera 22 include different reason codes for transmission. Further, when the plurality of alarm terminals 12 receive a specific report command including the identification code 16 that matches the identification code 16 assigned to each, or a simultaneous broadcast command, and issue a report from each, The buzzer sound to be output is switched according to the reason code included in the received specific alerting command or simultaneous alerting command to issue the alert. That is, in the above example, the notification command sent to prompt a break for heat stroke measures when the temperature exceeds a predetermined value, and the alert command sent to call attention so as not to contact the suspended load 48. A different buzzer sound is issued depending on the notification command. As a result, various cautions can be urged to the plurality of workers W carrying the alarm terminal 12 according to the reason why the monitoring determination unit 26 determines that the alarm is necessary.

  Further, the construction site monitoring system 10 according to the embodiment of the present invention is installed such that the photographing means 22 as the data acquisition means 20 photographs waves and the like around the construction site when the construction site is on the water. May be done. In this case, the monitoring determination unit 26 connected to the image capturing unit 22 determines whether or not a wave affecting the construction site arrives from the image data obtained by photographing the waves around the construction site, and such a wave is detected. When it is determined that it will arrive, a warning command for notifying that a large wave is coming is transmitted to all the workers W at the construction site. At this time, even if the distance from the transmitter / receiver 30 to the farthest worker W carrying the alarm terminal 12 is long, the notification commands are issued in order from the mobile terminal 12 in the position close to the transmitter / receiver 30. By being relayed by the alarm terminal 12, the warning command can be transmitted to the alarm terminal 12 of the farthest worker W far away without any problem.

In addition, the construction site monitoring system 10 according to the embodiment of the present invention may have a plurality of entire configurations installed in one construction site. In this case, different wireless channels are used between the monitoring systems 10, and the same number of communication networks as that shown in FIG.
The construction site monitoring method according to the embodiment of the present invention is executed by the construction site monitoring system 10 according to the above-described embodiment of the present invention, so that an operation equivalent to that of the construction site monitoring system 10 is achieved. It is possible to exert an effect.

  10: Construction site monitoring system, 12 (12A to 12D): Alarm terminal, 14 (14A to 14C): Transmitter / receiver unit, 16 (16A to 16C): Identification code, 20: Data acquisition means, 22: Imaging means (crane Camera), 26: monitoring determination means, 30: transmission / reception means, 34 (34A to 34C): worn article, 36 (36A to 36C): identification mark, 40: crane, 42: boom, 44: sheave, W (W1 to W1) W3): Worker

Claims (12)

A monitoring system for a construction site where multiple workers are engaged,
A plurality of alarm terminals carried by each of the plurality of workers and provided with a transmitting / receiving unit for performing wireless communication, and a plurality of alarm terminals provided with different identification codes from each other,
At least one data acquisition means for acquiring predetermined data of the construction site and / or its periphery;
At least one monitoring determination means connected to the at least one data acquisition means on a one-to-one basis;
A transmitting / receiving unit for performing wireless communication, the transmitting / receiving unit being connected to one of the at least one monitoring determining unit,
The plurality of alarm terminals and the monitoring determination means connected to the transmitting and receiving means is for performing multi-hop wireless communication using the monitoring determination means as a master station and the plurality of alarm terminals as slave stations.
The at least one monitoring determination unit determines the necessity of reporting based on the predetermined data acquired by the data acquisition unit of the connection destination, and the notification is required when it is determined that the notification is required. Depending on the reason determined to be, a specific notification command including the identification code, or a simultaneous notification command that does not include the identification code is transmitted via the monitoring determination means to which the transmission and reception means is connected,
The plurality of alarm terminals carry the alarm terminals when they receive the specific notification command including the identification code that matches the identification code assigned to each of them or the simultaneous notification command. A construction site monitoring system that alerts employees.   The construction site monitoring system according to claim 1, wherein the plurality of alarm terminals and the monitoring determination unit to which the transmission / reception unit is connected perform ZigBee standard communication as the multi-hop wireless communication. The at least one data acquisition means includes a photographing means for photographing a part of the construction site and / or the surroundings of the construction site and acquiring image data as the predetermined data.
3. The construction site according to claim 1, wherein the monitoring determination unit connected to the image capturing unit determines the necessity of alerting based on an image captured by the image capturing unit at the connection destination. Monitoring system. Furthermore, the plurality of wearables of workers, provided at a position visible from the outside, including identification marks different from each other between workers,
The identification code and the identification mark are tied in a one-to-one correspondence with the worker carrying the alarm terminal and wearing the wearable article as a common item,
The photographing means photographs a part of the construction site,
The monitoring determination unit connected to the image capturing unit determines, based on the image captured by the image capturing unit at the connection destination, the necessity of issuing a report to the worker captured in the image, and When it is determined that it is necessary, the specific notification including the identification code that is read on the identification mark provided on the worn article of the worker who is determined to be necessary and that is associated with the read identification mark is issued. The construction site monitoring system according to claim 3, wherein the monitoring system transmits a command.   5. The construction site monitoring system according to claim 4, wherein the photographing means is a crane camera attached to a sheave provided at the tip of the boom of the crane so as to photograph the vertically downward direction.   The construction site monitoring system according to claim 4, wherein the worn article is a helmet.   7. The construction site monitoring system according to claim 4, wherein the identification mark is a colored or color barcode applied to at least a part of the worn article. The at least one data acquisition means includes a plurality of the photographing means, and a plurality of the monitoring determination means in the number corresponding to the plurality of the photographing means,
The plurality of photographing means are installed so as to photograph from different angles and / or different positions,
The plurality of monitoring determination means connected to the plurality of image capturing means individually determine the necessity of reporting based on the images captured by the image capturing means connected to each of them. The construction site monitoring system according to any one of 3 to 7. The at least one monitoring determination means transmits a reason code different for each reason determined to be required to be issued, included in the specific notification command and the simultaneous notification command,
The plurality of alarm terminals switch the buzzer sound to be output according to the reason code included in the received specific notification command or the simultaneous notification command when issuing a notification from each of them. The construction site monitoring system according to any one of claims 1 to 8, characterized in that the information is transmitted. A method of monitoring a construction site in which multiple workers are engaged,
A plurality of alarm terminals provided with a transmission / reception unit for performing wireless communication and having identification codes different from each other are carried by the plurality of workers,
At least one data acquisition unit for acquiring predetermined data of the construction site and / or its periphery, at least one monitoring determination unit connected to the at least one data acquisition unit in a one-to-one correspondence, and the at least one monitoring A transmission / reception means for performing wireless communication, which is connected to one of the determination means,
The monitoring determination unit, which is connected to the plurality of alarm terminals and the transmission / reception unit, causes the monitoring determination unit to perform multi-hop wireless communication using the master station and the plurality of alarm terminals as slave stations.
The at least one monitoring determination unit determines the necessity of the report based on the predetermined data acquired by the data acquisition unit of the connection destination, and the report is necessary when the report is determined to be necessary. Depending on the reason determined to be, a specific notification command including the identification code, or a simultaneous notification command that does not include the identification code is transmitted via the monitoring determination means to which the transmission and reception means is connected,
When the plurality of alarm terminals receive the specific alerting command including the identification code that matches the identification code assigned to each, or the simultaneous alerting command, the alert terminal receives the alert terminals. A method of monitoring a construction site, which is characterized by issuing an alarm to a worker who is carrying it. As the at least one data acquisition means, a photographing means for photographing a part of the construction site and / or a state around the construction site and acquiring image data as the predetermined data is installed.
11. The construction site monitoring method according to claim 10, wherein the necessity of reporting is determined by the monitoring determination unit connected to the image capturing unit based on the image captured by the image capturing unit at the connection destination. . Wearables of the plurality of workers, at positions visible from the outside, provided with different identification marks between workers,
The identification code and the identification mark are tied in a one-to-one correspondence with the worker carrying the alarm terminal and wearing the worn article as a common item.
With the above-mentioned photographing means, photograph a part of the construction site,
The monitoring determination unit connected to the image capturing unit determines, based on the image captured by the image capturing unit at the connection destination, the necessity of issuing an alarm to the worker captured in the image, and When it is determined that it is necessary, the specific notification including the identification code that is read on the identification mark provided on the worn article of the worker who is determined to be necessary and that is associated with the read identification mark is issued. The method for monitoring a construction site according to claim 11, further comprising transmitting a command.