JP2023131447A - Management apparatus and management method - Google Patents

Abstract

To provide a management apparatus that can properly issue a notification about danger that has occurred to a worker.SOLUTION: A management apparatus 200 includes: a position information acquisition unit 210 which acquires position information of each of multiple workers; a first notification control unit 220 which determines whether a worker has entered a dangerous area on the basis of the position information, and issues a first notification to a first worker who has entered the dangerous area; a decision unit 230 which decides whether to issue a second notification, on the basis of the position information of the first worker after the first notification; a specifying unit 240 which specifies, when a decision is made that the second notification is to be issued, a second worker who is to be notified of the second notification, on the basis of the position information of the first worker; and a second notification control unit 250 which issues the second notification to the second worker.SELECTED DRAWING: Figure 10

Description

The present disclosure relates to a management device and a management method.

2. Description of the Related Art A technique is known in which location information of a person to be monitored is acquired using GNSS (Global Navigation Satellite System) or the like, and a predetermined notification destination is notified that the person to be monitored has entered a predetermined area. For example, Patent Document 1 discloses an acquisition means for acquiring the position of a mobile terminal, a determination means for determining whether the position of the mobile terminal is within the warning area, and a determination means for determining whether the position of the mobile terminal is within the warning area. Disclosed is a monitoring device comprising a first notification means for providing notification. The monitoring device also includes a storage unit that stores notification destination designation information that specifies a notification destination when the location of the mobile terminal is determined to be within the warning area. The first notification means notifies the notification destination specified by the notification destination designation information.

Japanese Patent Application Publication No. 2002-269653

Various contractors come and go at construction sites where civil engineering and architectural works are carried out, and the conditions at the site are constantly changing. Therefore, workers may not be able to accurately locate the dangerous area. In addition, the construction site manager grasps the work status of the workers and manages the safety of the site. However, at construction sites with poor visibility, it may be difficult to see workers and dangerous areas, and there are situations in which it is difficult for managers to understand whether workers are working safely or not.

Assume that at such a construction site, it is detected that a worker has entered a predetermined dangerous area, and the worker is notified. Near hazardous areas, construction noise and vibrations may be large, and visibility from workers may be poor. Therefore, the worker who received the warning may not notice the warning or the dangerous area. Furthermore, even if the worker notices the warning, if the worker is unable to evacuate from the dangerous area, the notification itself may become meaningless.

In view of the above-mentioned problems, an object of the present disclosure is to provide a management device and a management method that can appropriately notify a worker of the danger that has occurred.

The management device according to the present disclosure is
a position information acquisition unit that acquires position information of each of the plurality of workers;
a first notification control unit that determines whether the worker has entered a dangerous area based on the position information and provides a first notification to the first worker who has entered the dangerous area;
a determining unit that determines whether to perform a second notification based on the position information of the first worker after the first notification;
When it is determined to perform the second notification, a specifying unit that specifies a second worker who is a destination of the second notification based on the position information of the first worker;
A second notification control section that performs the second notification to the second worker.

The management method for this disclosure is as follows:
The computer is
a position information acquisition step of acquiring position information of each of the plurality of workers;
a first notification control step of determining whether or not the worker has entered a dangerous area based on the position information, and providing a first notification to the first worker who has entered the dangerous area;
a determining step of determining whether to perform a second notification based on the position information of the first worker after the first notification;
When it is determined to perform the second notification, a specifying step of specifying a second worker who is a destination of the second notification based on the position information of the first worker;
and a second notification control step of giving the second notification to the second worker.

A management device and a management method according to the present disclosure make it possible to appropriately notify a worker of a danger that has occurred.

FIG. 1 is a block diagram showing the configuration of a management system according to an embodiment. 1 is a schematic diagram of a management system according to an embodiment. 1 is a diagram schematically showing a construction site where a management system according to an embodiment is used. FIG. 1 is a block diagram showing the configuration of a notification device according to an embodiment. FIG. 1 is a block diagram showing the configuration of a management device according to an embodiment. It is a figure showing an example of attribute information concerning an embodiment. It is a figure showing an example of danger area information concerning an embodiment. It is a figure showing an example of position information concerning an embodiment. It is a figure showing an example of work record information concerning an embodiment. 3 is a flowchart illustrating processing performed by the management device according to the embodiment.

Embodiments of the present disclosure will be described in detail below with reference to the drawings. Identical or corresponding elements are provided with the same reference numerals in the drawings. For clarity of explanation, redundant explanations will be omitted as necessary.

<Configuration of management system 1000>
First, with reference to FIG. 1, the configuration of a management system 1000 according to this embodiment will be described. FIG. 1 is a block diagram showing the configuration of a management system 1000 according to this embodiment. As shown in FIG. 1, the management system 1000 includes a plurality of notification devices 100a, 100b, 100c, . . . and a management device 200.

Each of the notification devices 100a, 100b, 100c, . . . and the management device 200 are connected via a network N. Here, the network N is a wired or wireless communication line. The network N includes, for example, Bluetooth (registered trademark), Wi-Fi (registered trademark), the Internet, WAN (Wide Area Network), LAN (Local Area Network), public line, provider equipment, dedicated line, wireless base station, etc. may be included.

The notification devices 100a, 100b, 100c, . . . and the management device 200 each include a processor, a memory, and a storage device (not shown). The storage device stores a computer program in which the processing according to the present embodiment is implemented. The processor can then load a computer program from the storage device into the memory and execute the computer program. Thereby, the processor realizes various functions described below.

Since the configurations of the notification devices 100a, 100b, 100c, . . . are equivalent, each of the notification devices 100a, 100b, 100c, . may be explained. Although FIG. 1 shows an example in which three notification devices 100a, 100b, and 100c are connected to the management device 200, the number of notification devices 100 is not limited to three.

<Overview of management system 1000>
Next, an overview of the management system 1000 according to this embodiment will be explained with reference to FIG. 2. FIG. 2 is a schematic diagram of the management system 1000. As described above, the management system 1000 includes the notification devices 100a, 100b, 100c, . . . and the management device 200 connected to these devices via the network N. Note that in FIG. 2, illustration of the network N is omitted.

The management system 1000 is an information processing system that can manage a plurality of users who are management targets. In this embodiment, a case where the management system 1000 is used at a construction site will be described as an example. In this embodiment, the user is a worker working at a construction site. The worker is, for example, an employee of a corporation that performs construction work.

A worker performs work while wearing a notification device 100 that notifies the worker when a predetermined condition is met. The notification device 100 is provided, for example, in a helmet worn by a worker. In the example of FIG. 2, the notification devices 100a, 100b, 100c, . . . are provided in helmets worn by workers U1, U2, U3, . Although FIG. 2 shows an example in which the notification device 100 is provided outside the helmet, the notification device 100 may be provided inside the helmet. Note that, hereinafter, the fact that the worker "wears a helmet provided with the notification device 100" may be simply expressed as "wears the notification device 100."

The notification device 100 detects the position information of the worker and transmits the detected position information to the management device 200. The management device 200 performs predetermined processing using the received position information, and controls the notification performed by the notification device 100 according to the processing result.

For example, the management device 200 determines whether the worker has entered a dangerous area based on the worker's position information. The dangerous area indicates an area that will be notified if a worker enters the area. In the following description, the worker who is determined to have entered a dangerous area may be referred to as a first worker. The management device 200 controls the notification device 100 worn by the first worker so as to give the first notification to the first worker.

Moreover, the management device 200 determines whether to perform the second notification based on the position information of the first worker after the first notification. When it is determined to perform the second notification, the management device 200 specifies the second worker who is the destination of the second notification based on the position information or attribute information of the first worker. The management device 200 controls the notification device 100 worn by the second worker so as to give the second notification to the specified second worker. Specifically, the management device 200 generates warning information indicating the content of the warning, transmits it to the notification device 100, and causes the notification device 100 to execute the notification.

Here, with reference to FIG. 3, the flow of notification performed by the management system 1000 will be briefly described. FIG. 3 is a diagram schematically showing a construction site where the management system 1000 is used. At the construction site, workers U1 to U5 are working. Further, dangerous areas a10 and a20 are set at the construction site. Dangerous areas a10 and a20 are areas including dangerous spots a1 and a2, respectively. The management device 200 stores in advance the position information of the positions indicated by the dangerous areas a10 and a20.

The notification devices 100a to 100e worn by the workers U1 to U5 transmit their respective position information to the management device 200 at predetermined time intervals. The management device 200 acquires position information transmitted from each of the notification devices 100a to 100e. Here, as shown in FIG. 3, it is assumed that the worker U1 enters the dangerous area a10. The management device 200 determines that the worker U1 has entered a dangerous area based on the position information of the worker U1 transmitted from the notification device 100a. Worker U1 corresponds to the first worker described above.

The management device 200 generates warning information for making the first notification, transmits it to the notification device 100a, and causes the notification device 100a to make the first notification. The notification device 100a performs the first notification using audio or the like. For example, the notification device 100a outputs a voice such as "You have entered a dangerous area. Please evacuate from the dangerous area." to notify the worker U1 of a warning.

The management device 200 monitors the position information of the worker U1 after the first notification, and determines whether to perform the second notification. For example, if the worker U1 stays in the dangerous area a10 for a predetermined time or longer, the management device 200 determines to issue the second notification. In this case, the management device 200 specifies a second worker other than the worker U1 as the destination of the second notification. The management device 200 can identify the second worker based on the first worker's location information or attribute information. The attribute information includes, for example, the details of the work in charge and the details of equipment.

For example, the management device 200 identifies the worker U2 closest to the worker U1 as the second worker. Further, for example, the management device 200 may specify the worker U3 having the same attribute information as the worker U1 as the second worker. Here, it is assumed that the management device 200 identifies both workers U2 and U3 as the second workers.

The management device 200 generates warning information for performing the second notification, and transmits the warning information to the notification devices 100b and 100c worn by the workers U2 and U3, respectively. For example, the notification devices 100b and 100c output a voice such as "XX minutes have passed since worker U1 entered the danger area a10." Thereby, the workers U2 and U3 can grasp the situation of the worker U1, so they can take actions such as heading to the dangerous area a10 and checking on the situation of the worker U1. Note that although two second workers are specified here, the number of second workers is not limited to this.

<Configuration of notification device 100>
Next, the notification device 100 will be explained with reference to FIG. 4. FIG. 4 is a block diagram showing the configuration of the notification device 100. The notification device 100 includes a position information detection section 110, a photographing section 120, an abnormality detection section 130, a notification section 150, and a communication section 170.

The notification device 100 is an information processing device that communicates with the management device 200 and provides notifications to workers under the control of the management device 200. The notification device 100 is provided, for example, in equipment worn by a worker, and moves with the worker. The notification device 100 acquires the current location and transmits the location information to the management device 200. Thereby, the worker's position information can be transmitted from the notification device 100 to the management device 200 without requiring any operation by the worker.

The equipment provided with the notification device 100 is, for example, the above-mentioned helmet, but is not limited thereto. The equipment may be various articles that can be worn by the worker, such as work clothes, safety belts, safety shoes, wristbands, or armbands. Further, the notification device 100 may be realized by a wearable device that can be worn by a worker as an accessory. For example, the notification device 100 may be configured with a smart watch or smart glasses.

The location information detection unit 110 detects location information indicating the location of the notification device 100. The position information detection unit 110 may be configured using a technology such as GNSS, for example. As the GNSS, for example, GPS (Global Positioning System) can be used. The location information may be, for example, information indicating the latitude and longitude of the current location of the notification device 100. However, the location information detection unit 110 may detect location information using an indoor positioning technology such as a beacon, RFID (radio frequency identifier), ultrasound, geomagnetism, or UWB (Ultra Wide Band). By using such technology, the position information detection unit 110 can accurately detect position information even when GNSS satellite signals cannot be properly received at an indoor construction site or the like.

The location information detection unit 110 transmits the detected location information along with date and time information to the management device 200 at predetermined time intervals. For example, the location information detection unit 110 transmits location information to the management device 200 in real time. By doing so, the management device 200 can acquire position information of a plurality of workers in real time.

The photographing unit 120 is a photographing device that photographs the surroundings of the notification device 100. The photographing unit 120 is, for example, a visible light camera. The photographing unit 120 may be an infrared camera or other photographing device. The photographing unit 120 is provided in the notification device 100, for example, to photograph the area in front of the worker. Thereby, the photographing unit 120 can photograph a range equivalent to the field of view of the worker according to the movement of the worker. However, the present invention is not limited to this, and the photographing unit 120 may be configured to be able to photograph the left and right direction or the rear of the worker. The photographing unit 120 transmits the photographed image obtained by photographing, along with date and time information, to the management device 200 at predetermined time intervals. The photographed image may be a still image or a moving image.

The abnormality detection unit 130 is a detection device that detects an abnormality occurring in a worker. Here, abnormality indicates a state different from the normal state of the worker. The abnormality may include, for example, a worker's fall, fall or fall from scaffolding, contact with heavy machinery, injury, accident, or poor physical condition. The abnormality detection unit 130 may be configured with various sensors capable of detecting these abnormalities. When detecting an abnormality, the abnormality detection unit 130 transmits abnormality information indicating the details of the abnormality to the management device 200 along with date and time information and location information.

For example, the abnormality detection unit 130 is an acceleration sensor that detects an impact on the notification device 100. The abnormality detection unit 130 detects acceleration corresponding to the movement of the notification device 100. When the abnormality detection unit 130 detects an acceleration equal to or higher than a predetermined threshold value, the abnormality detection unit 130 detects that an abnormal impact has been applied to the notification device 100 and transmits the detection result to the management device 200. As a result, it is possible to detect that an abnormality has occurred in the worker, for example, when the worker falls down or when something falls on his helmet, and sends the detection result to the management device 200.

Further, the abnormality detection unit 130 may be a sensor that acquires information regarding the physical condition of the worker. For example, the abnormality detection unit 130 may be various sensors that detect a worker's blood pressure, body temperature, pulse rate, or the like. The abnormality detection unit 130 detects an abnormality in the physical condition of the worker when the measured value differs from the normal state by a predetermined value or more.

Furthermore, the abnormality detection unit 130 may detect an abnormality such as a fall or fall of the worker by analyzing the photographed image acquired by the photographing unit 120. Furthermore, the abnormality detection unit 130 detects sounds emitted from surrounding heavy equipment, vehicles, materials, etc., or sounds emitted by workers, etc. from a microphone (not shown) included in the notification device 100, and detects these sounds. Anomalies may be detected by analysis.

Further, the abnormality detection unit 130 may detect an abnormality when the position information of the worker indicates the same position for a predetermined period of time or more, or when the movement of the worker is not detected by the acceleration sensor for a predetermined period of time or more.

The notification unit 150 performs the first or second notification according to the warning information received from the management device 200. The notification unit 150 provides notification using, for example, voice, text, light, or vibration. The notification unit 150 may be, for example, a speaker, a display, a lamp, a vibrator, or the like. The notification form of the notification performed by the notification unit 150 is not limited to these. Further, the notification unit 150 may perform notification using a plurality of notification formats among these.

For example, the notification unit 150 may perform notification using different notification formats depending on the degree of danger indicating the level of danger to the worker. The degree of danger can be calculated, for example, according to the magnitude of the risk of an accident occurring in a dangerous area or the degree of poor physical condition of the worker. For example, the notification unit 150 may make notifications such that the effect of the notification increases as the degree of danger increases, such as by increasing the volume or increasing the number of notification formats. Further, the notification unit 150 may use different notification formats for each notification, such as, for example, using only vibration for the first notification, and using vibration and sound for the second notification. The notification form may be specified in the warning information.

The communication unit 170 is a communication interface with the network N. The communication unit 170 may be configured as a communication interface for communicating using a wireless standard such as Wi-Fi (registered trademark) or Bluetooth (registered trademark). The communication unit 170 may be configured to be able to communicate with other notification devices 100. Further, the communication unit 170 may be configured to be capable of communicating with, for example, an information processing device included in a robot that performs work at a site, an information processing device mounted on a heavy machine used for work, or the like.

<Configuration of management device 200>
Next, the management device 200 will be described with reference to FIG. 5. FIG. 5 is a block diagram showing the configuration of the management device 200. The management device 200 includes a location information acquisition section 210, a first notification control section 220, a determination section 230, a specification section 240, a second notification control section 250, a dangerous area setting section 260, a communication section 270, and a storage section 290. There is.

The management device 200 is an information processing device that processes, stores, transmits and receives various information. The management device 200 may be, for example, a server device, a PC (Personal Computer), or the like. The management device 200 performs predetermined processing based on the respective position information transmitted from the plurality of notification devices 100, and controls the plurality of notification devices 100. For example, the management device 200 designates one or more notification devices 100 to notify the worker of danger regarding the worker himself or herself and surrounding workers. Further, the management device 200 can, for example, notify the notification device 100 of a predetermined work group of a work start time, or issue a work instruction to the notification device 100 of a specific worker. By doing so, the management device 200 collectively manages the status of multiple workers.

The position information acquisition unit 210 acquires the position information of each of the plurality of workers from the notification device 100 at predetermined time intervals. The position information acquisition unit 210 may acquire all the position information of a plurality of workers in real time, or may acquire it at different time intervals depending on the distance from the dangerous area, for example. For example, the position information acquisition unit 210 may acquire position information of a worker who is in a dangerous area at a shorter time interval than that of a worker who is outside the dangerous area. The location information acquisition unit 210 stores the acquired location information in the storage unit 290 as location information 293 in association with date and time information.

FIG. 8 is a diagram showing an example of the position information 293. The position information 293 is, for example, information in which a position information ID 2931, a date and time 2932, a worker ID 2933, and a position 2934 are associated with each other. The location information ID 2931 is information that identifies location information. The date and time 2932 is information indicating the date and time when the location information was acquired. Worker ID 2933 is information indicating a worker ID. Worker ID 2933 corresponds to worker IDs 2911 and 2944, which will be described later. The worker ID 2933 is identified from the notification device ID of the notification device 100 worn by the worker. The notification device ID will be described later. The position 2934 is information indicating the position of the worker. The location 2934 may be information indicating the latitude and longitude of the current location of the notification device 100, for example.

Returning to FIG. 5, the explanation will be continued. The first notification control unit 220 determines whether the worker has entered a dangerous area based on the worker's position information, and sends a message to the worker (first worker) who has entered the dangerous area. 1. Make a notification. The dangerous area indicates an area that will be notified if a worker enters the area. The dangerous area is stored in the storage unit 290 as dangerous area information 292. The dangerous area is set in a dangerous area setting section 260, which will be described later. Details of the danger area and how to set it will be described later.

The flow until the first notification control unit 220 performs the first notification will be explained. First, the first notification control unit 220 determines whether the worker has entered a dangerous area based on the worker's position information acquired by the position information acquisition unit 210. The first notification control unit 220 determines, for example, whether the position indicated by the worker's position information is within the dangerous area stored in the dangerous area information 292.

If the position indicated by the worker's position information is within the dangerous area, the first notification control unit 220 determines that the worker has entered the dangerous area. In this case, the first notification control unit 220 issues the first notification to the notification device 100 worn by the worker who has entered the dangerous area. The position information acquisition unit 210 generates warning information for making the first notification, transmits it to the notification device 100, and controls the notification device 100 so that the notification device 100 makes the first notification.

The first notification may be, for example, to notify that the first worker has entered a dangerous area. Further, the first notification may be one that urges the user to evacuate from the dangerous area. The warning information for making the first notification may be, for example, an audio signal for outputting a warning such as "You have entered a dangerous area. Please evacuate from the dangerous area." The notification device 100 worn by the first worker receives the warning information and issues the first notification in accordance with the warning information. By receiving the first notification via voice or the like, the first worker can understand that he/she has entered a dangerous area and can take actions such as evacuating from the dangerous area.

The first notification control unit 220 may generate warning information with different contents depending on the degree of risk. For example, the first notification control unit 220 generates warning information according to the risk of an accident occurring in a dangerous area and the degree of approach to a dangerous spot. For example, the first notification control unit 220 may issue messages such as "You have entered a high-risk danger area. Please evacuate immediately." or "You are approaching a dangerous location at a distance of ○m." Warning information including warnings that allow workers to easily recognize the degree of danger may be generated.

Further, the first notification control unit 220 may generate warning information in different notification formats depending on the degree of risk. For example, the first notification control unit 220 generates warning information such that the volume and vibration increase as the degree of danger increases. By doing so, the first worker can recognize the level of danger when the first notification is made. The setting of the notification content and notification form is the same for the second notification described later.

Note that when the first notification control unit 220 determines that the worker has entered a dangerous area, the first notification may be made immediately, or after a predetermined period of time (for example, 30 seconds) has elapsed. The first notification may be made. By doing the latter, it is possible to prevent the first notification from being performed excessively in the notification device 100. Note that the predetermined time until notification may be set for each worker or may be set for each dangerous area. For example, a longer predetermined time may be set for a worker with less work experience than for a worker with more work experience. Further, the predetermined time may be set depending on the degree of risk of the dangerous area. For example, a shorter predetermined time may be set for a high-risk area than for a low-risk area. Regarding the setting of the predetermined time, the same applies to the second notification described later.

Further, in this embodiment, the first notification control unit 220 controls the notification device 100 to perform the first notification, but the present invention is not limited to this. For example, the first notification control unit 220 may cause a buzzer or the like provided at the site to issue the first notification. By doing so, the worker can easily notice the first notification.

The determining unit 230 determines whether to perform the second notification based on the position information of the first worker after the first notification. The second notification is to notify information regarding the first worker to a worker (second worker) different from the first worker who has entered the dangerous area. The information regarding the first worker may include the first worker's location information, time spent in the dangerous area, attributes, and the like. The second worker is, for example, a worker who is around the first worker or a worker whose attributes match or are similar to the first worker. By receiving the second notification, the second worker can more quickly and appropriately understand that the first worker may be in danger.

Note that the second worker is not limited to a worker who performs work at the site. The second worker may be a manager. Further, the second worker may be a person who performs work other than the construction site, such as in an office within the construction site. Furthermore, the second worker is not limited to a person. The second worker may be, for example, a mobile body that can autonomously move within the site. The mobile object may include, for example, a robot such as a drone that travels or flies within the site. The mobile object may be an automatic driving vehicle or the like. For example, a control device for controlling these moving objects includes some or all of the functions of the notification device 100 shown in FIG. 4. The control device may be configured to receive warning information from the management device 200 and autonomously move to the location where the first worker is present.

The determination unit 230 acquires the position information of the first worker after the first notification from the position information acquisition unit 210. The determining unit 230 refers to the dangerous area information 292 and determines whether the position indicated by the position information of the first worker after the first notification is within the dangerous area. If it is determined that the position is within the dangerous area, it is assumed that the first worker has not evacuated from the dangerous area even after recognizing the first notification. In this case, the determining unit 230 determines to perform the second notification. Furthermore, if it is determined that the position is not within the dangerous area, it is assumed that the first worker evacuated from within the dangerous area after recognizing the first notification. In this case, the determining unit 230 determines not to perform the second notification.

Further, the determining unit 230 may further determine whether to perform the second notification based on the time the first worker stays in the dangerous area. If the position indicated by the position information of the first worker after the first notification is within the dangerous area, the determining unit 230 calculates the stay time of the first worker in the dangerous area. For example, the determining unit 230 calculates the stay time in the dangerous area based on the date and time information of the time when the first worker entered the dangerous area and the current time. If the stay time is longer than a predetermined time (for example, 5 minutes), the determining unit 230 determines to perform the second notification. Further, if the stay time is less than the predetermined time, the determining unit 230 determines not to perform the second notification.

Note that the determining unit 230 may decide not to issue the second notification if there is a response from the first worker to the first notification. For example, when the worker notices the warning sound of the first notification, the worker stops the warning sound by pressing a predetermined release switch (not shown) provided on the notification device 100. The notification device 100 transmits to the management device 200 that the release switch has been pressed. The determining unit 230 determines that the second notification will not be made if the release switch is pressed within a predetermined time after the first notification.

Further, the determining unit 230 may further determine whether to perform the second notification based on the moving direction of the first worker. First, the determining unit 230 identifies the moving direction of the first worker based on the first worker's position information. The movement direction may include information indicating whether the first worker moved toward or away from the dangerous spot or area.

Specification of the moving direction will be specifically explained using the example shown in FIG. 3. First, it is assumed that the worker U1 enters the dangerous area a10 at time t1. The management device 200 detects this and transmits warning information regarding the first notification to the notification device 100a. The notification device 100a performs the first notification according to the warning information from the management device 200.

The position information acquisition unit 210 acquires the position information of the worker U1 at time t2 after the first notification. If the worker U1 is still within the dangerous area a10 at t2, the determining unit 230 specifies the direction of movement of the worker with respect to the dangerous spot a1. For example, the determining unit 230 calculates the distances d1 and d2 between the worker U1 and the dangerous spot a1 at t1 and t2, respectively.

The determining unit 230 compares d1 and d2. When d1>d2 is satisfied, the determining unit 230 specifies that the moving direction of the worker U1 is a direction approaching the dangerous spot a1. Further, when d1<d2 is satisfied, the determining unit 230 specifies that the moving direction of the worker U1 is a direction away from the dangerous spot a1. When it is specified that the moving direction of the worker U1 is a direction approaching the dangerous spot a1, the determining unit 230 determines to perform the second notification. Moreover, when it is specified that the moving direction of the worker U1 is a direction away from the dangerous spot a1, the determining unit 230 determines not to perform the second notification.

Note that if d1=d2 is satisfied, there is a possibility that the worker U1 has not moved between t1 and t2. In this case, the determining unit 230 may determine to perform the second notification. Thereby, for example, even if the first worker loses consciousness or falls into a hole, the determining unit 230 can decide to issue the second notification.

In the above example, the determination unit 230 specified the direction of movement of the worker relative to the dangerous area a1, but may also specify the direction of movement of the worker relative to the dangerous area a10. For example, the determining unit 230 identifies the moving direction by determining whether the worker is moving from inside the dangerous area a10 to outside the dangerous area a10 based on the position information after the first notification. You may. The determining unit 230 determines whether or not to perform the second notification according to the specified moving direction, as described above.

Furthermore, the determining unit 230 may determine whether or not to perform the second notification based further on the abnormality information transmitted from the notification device 100. The determining unit 230 determines whether abnormality information regarding the first worker is stored in the storage unit 290. If the abnormality information is stored, the determining unit 230 determines whether to perform the second notification based on the position information of the first worker and the abnormality information after the first notification.

For example, the determining unit 230 determines to issue the second notification if the first worker has stayed in the dangerous area for a predetermined time or more and there is abnormality information about the first worker. The determining unit 230 may determine whether to perform the second notification depending on the degree of abnormality indicating the level of abnormality. The degree of abnormality may be set according to the scale of the accident detected by the notification device 100 or the degree of poor physical condition of the worker. For example, the determining unit 230 determines to perform the second notification when the degree of abnormality is greater than or equal to a predetermined value, and determines not to perform the second notification when the degree of abnormality is less than the predetermined value.

Returning to FIG. 5, the explanation will be continued. When the determining unit 230 determines to issue the second notification, the identifying unit 240 identifies the second worker who is the destination of the second notification based on at least one of the position information and attribute information of the first worker. Identify. The identifying unit 240 can identify the second worker around the first worker by identifying the second worker based on the position information of the first worker. Moreover, the identifying unit 240 can identify a second worker whose attributes are similar to the first worker by identifying the second worker based on the attribute information of the first worker. Each identification method will be explained below.

First, a method for identifying the second worker based on the position information of the first worker will be described. The identifying unit 240 refers to the position information 293 and calculates the distance between the first worker and workers other than the first worker. The identification unit 240 extracts a worker who is within a predetermined distance from the first worker, and identifies the worker as the second worker. Thereby, the identification unit 240 can identify the second worker around the worker. Note that the predetermined distance may be determined by, for example, a radius centered on the first worker, or may be determined by taking into account the route that the worker can walk.

Further, when a plurality of workers within a predetermined distance from the first worker are extracted, the identification unit 240 may identify the second workers in order of distance from the first worker. The identification unit 240 identifies, for example, the second worker closest to the first worker. Thereby, the identification unit 240 can identify the second worker who is located closer to the first worker among the plurality of workers around the first worker. Note that the identifying unit 240 may identify a plurality of second workers.

Next, a method for identifying the second worker based on the attribute information of the first worker will be described. The identifying unit 240 identifies a second worker having attribute information that matches or is similar to the attribute information of the first worker. Here, the attribute information is information indicating attributes of the worker. Attribute information may include, for example, information regarding on-site work. The attribute information is information indicating, for example, the worker's charge, work content, equipment, qualifications, license, affiliation, knowledge, or years of work experience. The attribute information may include information indicating the age, gender, height, weight, etc. of the worker.

The attribute information is stored in advance in the storage unit 290 as attribute information 291. An administrator of the management system 1000 uses an information terminal such as the management device 200 to register attribute information 291 in advance.

FIG. 6 is a diagram showing an example of the attribute information 291. The attribute information 291 is, for example, information in which a worker ID 2911, a notification device ID 2912, a work content 2913, an equipment content 2914, a department 2915, a license 2916, and a knowledge 2917 are associated with each other.

Worker ID 2911 is information that identifies a worker. The notification device ID 2912 is information that identifies the notification device 100 included in the helmet worn by the worker. The work content 2913 is information indicating the content of the work that the worker is in charge of. The equipment content 2914 is information indicating the equipment content of the worker. The affiliation 2915 is information indicating the affiliation of the worker. The affiliation 2915 may be, for example, information indicating a work group determined according to the content of the work or the place in charge, or a corporation to which the worker belongs. The license 2916 is information indicating the license, qualification, etc. possessed by the worker. Knowledge 2917 is information indicating knowledge possessed by the worker. The knowledge may be set as appropriate depending on the work experience of the worker.

Since the above is an example, the attribute information 291 may include information other than these, or may include only a part of them. Further, among the attribute information 291, the equipment details 2914 may be registered in advance by an administrator or the like, or may be dynamically acquired using a photographed image of a worker. For example, the management device 200 identifies the equipment contents of the worker through image recognition using a photographed image acquired using the photographing unit 120 or a camera installed at the site, and stores it as the equipment contents 2914. Thereby, the management device 200 can appropriately update the equipment content 2914 even if there is a change in the equipment content.

The identifying unit 240 identifies the second worker on the condition that the attribute information 291 matches or is similar. For example, assume that the determining unit 230 determines to issue the second notification to the worker U1. The identifying unit 240 refers to the attribute information 291 and acquires the attribute information of the worker U1. The identifying unit 240 extracts a worker having attribute information that matches or is similar to the attribute information of the worker U1, and identifies the worker as a second worker.

The identifying unit 240 may extract workers based on a plurality of pieces of attribute information. For example, in the example shown in FIG. 6, the identification unit 240 "is in charge of the same work", "has the same equipment", "belongs to the same department", and "is in the same position" as the worker U1. Workers who meet two or more of the following conditions are extracted: "having a license" and "having the same knowledge."

The identifying unit 240 may extract workers whose attribute information matches the condition, or may calculate the similarity of the attribute information and extract workers with a high degree of similarity. Further, the identifying unit 240 may weight each piece of attribute information to identify the second worker. For example, if the condition is that either the work content or the equipment content must be included, the specifying unit 240 sets the two conditions of "being in charge of the same work" and "having the same equipment". is weighted so that it takes priority over other conditions.

Further, the identification unit 240 may extract workers based on attribute information related to a dangerous area or a dangerous location. For example, heavy machinery is placed in the dangerous area a10 into which the worker U1 has entered. In this case, the identification unit 240 extracts the worker on the condition that the worker is able to operate the heavy machinery. By doing so, the identifying unit 240 can identify the second worker who can operate the heavy equipment.

The identification unit 240 identifies the worker extracted using the above conditions as the second worker. When a plurality of workers are extracted, the identification unit 240 may identify the workers in descending order of similarity of attribute information. By doing so, the identifying unit 240 can identify a worker who can respond more appropriately when the worker U1 is in a dangerous situation.

The identifying unit 240 may identify the second worker using either the position information or attribute information of the first worker, or may identify the second worker using both. By using both location information and attribute information, preparations to deal with the danger of the first worker can be made more quickly and more appropriately than when simply issuing a second notification to surrounding workers. .

Note that the identifying unit 240 may identify the second worker further based on the abnormality information transmitted from the notification device 100. The identifying unit 240 can identify the second worker based on either or both of the first worker's location information and attribute information and the abnormality information. For example, assume that the abnormality information indicates that the first worker came into contact with heavy machinery. The identification unit 240 identifies the second worker under conditions such as being near the first worker, being able to operate the heavy machinery, and being able to respond to injuries caused by contact with the heavy machinery.

Returning to FIG. 5, the explanation will be continued. The second notification control unit 250 controls a notification device different from the notification device that gave the first notification to make the second notification. Specifically, the second notification control unit 250 controls the notification device 100 worn by the second worker to issue the second notification to the second worker identified by the identification unit 240. For example, assume that the identifying unit 240 identifies worker U2 as the second worker. In this case, the second notification control unit 250 controls the notification device 100b provided in the helmet worn by the worker U2.

The second notification control unit 250 generates warning information for performing the second notification and transmits it to the notification device 100. The warning information for issuing the second notification may include, for example, information regarding danger to the first worker. The warning information may include, for example, the situation, position, or attribute information of the first worker. The warning information may be, for example, an audio signal for outputting a warning such as "Worker U1 has been in the danger area a10 for more than X minutes. Please check the situation." By including information indicating the first worker's situation in the warning information, the second worker can understand the first worker's situation in more detail.

Further, like the first notification control unit 220, the second notification control unit 250 may generate different warning information depending on the degree of risk. By doing so, the second worker can receive the second notification depending on the situation of the first worker.

Note that the second notification control unit 250 may also issue the second notification to the first worker. This allows the first worker to understand that the second notification has been made and take appropriate action, even if the first worker simply did not notice the first notification.

Furthermore, although an example has been described here in which the first notification is performed first and the second notification is performed at a timing after the first notification, the present invention is not limited to this. The first notification control unit 220 and the second notification control unit 250 may perform the first notification and the second notification at the same timing.

For example, the first notification control unit 220 determines whether the worker has entered a dangerous area based on the worker's position information. If it is determined that the worker has entered the dangerous area, the first notification control unit 220 identifies the worker as the first worker, but does not issue the first notification. Therefore, the notification device 100 worn by the first worker does not provide notification. Then, the determining unit 230 determines whether or not to perform the second notification based on the position information of the first worker after the determination. When it is determined to perform the second notification, the specifying unit 240 specifies the second worker who is the destination of the second notification based on the position information of the first worker.

The first notification control unit 220 performs the first notification to the first worker after it is determined to perform the second notification, and the second notification control unit 250 performs the second notification at the same timing as the first notification. A second notification will be sent to members. By doing so, the management device 200 can perform the first and second notifications at the same timing. Here, the first notification control section 220 and the second notification control section 250 may generate warning information with different contents. For example, the first notification control unit 220 generates warning information to output a voice warning such as "You have entered a dangerous area. Please evacuate from the dangerous area. Surrounding workers have also been warned." and transmits it to the first worker's notification device 100. In addition, the second notification control unit 250 issues a warning such as "Worker U1 has been in the danger area a10 for more than X minutes. Please check the situation. Worker U1 has also been warned." Warning information for audio output is generated and transmitted to the second worker's notification device 100.

In this way, by providing notification using different warning information at the same timing, the management device 200 can provide appropriate notification to each worker.

The dangerous area setting unit 260 sets a dangerous area. The dangerous area indicates a predetermined area to be notified. For example, the dangerous area setting unit 260 sets, as a dangerous area, an area where there is a risk of danger to the worker if the worker enters the area. Hazardous areas may include, for example, openings, holes, elevated areas, slippery areas, crumbling areas, around moving heavy equipment, crane operating areas, material transport routes, etc. on a work site.

The shape of the dangerous area may be set arbitrarily. For example, as shown in FIG. 3, the danger area may be a circular or rectangular area. The dangerous area may indicate a predetermined area using longitude and latitude, or may indicate an area within a predetermined distance from a dangerous location. For example, in the example shown in FIG. 3, a circular dangerous area a10 that is a predetermined distance from a dangerous spot a1 where heavy equipment is placed, and a rectangular dangerous area a20 that includes a dangerous spot a2 where a hole is dug are set. ing.

The dangerous area setting unit 260 receives input from, for example, an administrator and sets a dangerous area. The administrator operates the management device 200 or another information terminal to input information about the dangerous region into the management device 200, thereby setting the dangerous region in advance. The dangerous area setting unit 260 stores the input contents in the storage unit 290 as dangerous area information 292. Further, the dangerous area setting unit 260 may accept input from an administrator or the like to cancel the setting of the dangerous area.

FIG. 7 is a diagram showing an example of the dangerous area information 292. The dangerous area information 292 is, for example, information in which a dangerous area ID 2921, a dangerous area 2922, a dangerous content 2923, and a risk level 2924 are associated with each other.

The dangerous area ID 2921 is information that identifies a dangerous area. Dangerous area 2922 is information indicating a dangerous area. For example, the dangerous area 2922 may indicate a predetermined area using longitude and latitude. The danger content 2923 is information indicating the content of the danger. The risk level 2924 is information indicating the risk level of the dangerous area. The risk level 2924 may be indicated by, for example, "high", "medium", "low", etc., or may be indicated by a numerical value.

Further, the dangerous area setting unit 260 may set the dangerous area based on a photographed image acquired from the photographing unit 120 provided in the notification device 100. For example, the dangerous area setting unit 260 uses a well-known image recognition technique to determine whether the captured image includes a dangerous area. A model learned by a machine learning method such as deep learning may be used for image recognition. When determining that the photographed image includes a dangerous area, the dangerous area setting unit 260 specifies the dangerous area, the content of the danger, and the degree of risk, and registers this information as the dangerous area information 292.

In this way, the dangerous area setting unit 260 can newly set a dangerous area using the photographed images acquired from the plurality of notification devices 100. Further, the dangerous area setting unit 260 may cancel the setting of the dangerous area based on the photographed image. Thereby, the dangerous area setting unit 260 can dynamically set a dangerous area recognized from a photographed image in addition to a dangerous area set in advance by an administrator or the like. Therefore, the danger area setting unit 260 can appropriately manage danger areas that change over time.

Note that the dangerous area setting unit 260 may set and cancel the dangerous area using images other than the photographed image acquired by the photographing unit 120. For example, the dangerous area setting unit 260 may set and cancel a dangerous area using captured images obtained by a camera installed at a construction site, a patrol robot patrolling the construction site, or the like.

The communication unit 270 is a communication interface with the network N. The communication unit 270 may be configured as a communication interface for communicating using a wireless standard such as Wi-Fi (registered trademark) or Bluetooth (registered trademark). The communication unit 270 is configured to be able to communicate with a plurality of notification devices 100 in the management system 1000. Further, the communication unit 270 may be configured to be capable of communicating with, for example, an information processing device included in a robot working at a construction site, an information processing device mounted on a heavy machine used for work, or the like.

The storage unit 290 is a storage device that stores programs for realizing each function of the management device 200. The storage unit 290 may be configured using, for example, a hard disk, a flash memory, or the like. The storage unit 290 stores attribute information 291, dangerous area information 292, position information 293, and work record information 294. Attribute information 291, dangerous area information 292, and position information 293 have already been explained, so their explanation will be omitted here.

The work record information 294 is information recording the work of the worker. The management device 200 stores photographed images acquired by the photographing unit 120 and cameras provided at the site in association with date and time information.

FIG. 9 is a diagram showing an example of the work record information 294. The work record information 294 is, for example, information in which a record ID 2941, date and time 2942, position 2943, worker ID 2944, content 2945, and image information 2946 are associated with each other.

Record ID 2941 is information that identifies work record information. The date and time 2942 is information indicating the recording date and time. The position 2943 is information indicating the position where the photographed image was acquired. The worker ID 2944 is information that identifies a worker related to the recording. The content 2945 is information indicating the content of the work record information. The content 2945 may include, for example, content recognized based on a captured image using a well-known image recognition technique. The content 2945 may include abnormality information transmitted from the notification device 100. The image information 2946 is image data acquired by the photographing unit 120 or a camera provided at the site.

The management device 200 constantly records position information of workers and stores it in the storage unit 290 as work record information 294. By referring to the work record information 294, the manager can understand the time required for the work and the work that involves danger. For example, the manager mechanizes tasks that place a heavy burden on workers using automatically controlled heavy machinery, robots, and the like. This can lead to increased efficiency in the overall work at the site. It can also lead to ensuring safety in environments where humans and machines work together.

Furthermore, the management device 200 may store work records not only for people but also for the above-mentioned mobile objects capable of autonomous movement. By doing so, work record information can be shared between humans and machines.

Note that the configuration of the management system 1000 described using FIGS. 1 to 5 is only an example. The management system 1000 may be configured using a device in which a plurality of configurations are integrated. For example, the functions of the notification device 100 and the management device 200 may be integrated into the same device. For example, by providing each of the plurality of notification devices 100 with the functions of the management device 200, the functions of the management system 1000 can be realized without providing the management device 200. Thereby, the plurality of notification devices 100 can share information in real time by transmitting information regarding dangerous areas and workers to each other. Further, in this case, the plurality of notification devices 100 may communicate with an information processing device mounted on heavy machinery, a camera provided at the site, or the like. Thereby, for example, it is also possible to directly send the first and second notifications to the worker from the information processing device mounted on the heavy equipment using the notification device 100.

Moreover, each functional unit in each of the notification device 100 and the management device 200 may be distributed and processed using a plurality of devices. For example, in FIG. 4, functional units such as the position information detection unit 110 and the photographing unit 120 are shown inside the notification device 100, but these may be provided separately outside the notification device 100.

Further, in the above description, the photographed image is transmitted from the notification device 100 to the management device 200 and the dangerous area is set in the dangerous area setting unit 260, but the setting of the dangerous area may be performed by the notification device 100. Further, in the above description, the abnormality is detected by the abnormality detection unit 130 of the notification device 100, but the measurement value such as acceleration may be transmitted to the management device 200, and the abnormality may be detected in the management device 200.

<Processing performed by management device 200>
Next, with reference to FIG. 10, the processing performed by the management device 200 will be described. FIG. 10 is a flowchart showing the processing performed by the management device 200.

First, the position information acquisition unit 210 acquires the position information of each of a plurality of workers from the notification device 100 (S101). The first notification control unit 220 determines whether the worker has entered a dangerous area based on the acquired position information (S102). If it is determined that the worker has not entered the dangerous area (NO in S102), the management device 200 returns to step S101 and repeats the process. Thereby, the management device 200 monitors the worker's entry into the dangerous area.

If it is determined that the worker has entered the dangerous area (S102: YES), the first notification control unit 220 issues a first notification to the first worker who has entered the dangerous area (S103). . Here, as an example, the explanation will be given assuming that the first worker is worker U1 wearing the notification device 100a. The first notification control unit 220 generates warning information for performing the first notification, transmits it to the notification device 100a, and controls the notification device 100a to perform the first notification. The notification device 100a outputs, for example, a voice message such as "You have entered a dangerous area. Please evacuate from the dangerous area." from a speaker.

Subsequently, the determination unit 230 acquires the position information of the worker U1 after the first notification from the position information acquisition unit 210, and determines whether to perform the second notification based on the position information (S104). . For example, the determining unit 230 determines to perform the second notification if the position information of the worker U1 indicates that it is within the danger area even after the first notification, and otherwise determines not to perform the second notification.

Further, the determining unit 230 may further determine whether to perform the second notification based on the time the worker U1 stays in the dangerous area. The determining unit 230 determines to perform the second notification if the worker U1 stays in the danger area for a predetermined time or longer, and determines not to perform the second notification if not.

Furthermore, the determining unit 230 may determine whether to perform the second notification based further on the moving direction of the worker U1. For example, the determining unit 230 identifies the moving direction of the first worker. The movement direction indicates whether the worker U1 moved toward or away from the dangerous spot or area. When it is specified that the moving direction of the worker U1 is a direction approaching a dangerous area or the like, the determining unit 230 determines to perform the second notification. Moreover, when it is specified that the moving direction of the worker U1 is a direction away from the dangerous area, the determining unit 230 determines not to perform the second notification. Note that the determining unit 230 may determine whether or not to perform the second notification by taking abnormality information into account.

Subsequently, the specifying unit 240 determines whether the determining unit 230 has determined to perform the second notification (S105). If it is determined not to perform the second notification (NO in S105), the process ends. When it is determined to perform the second notification (YES in S105), the identifying unit 240 identifies the second worker to whom the second notification is to be sent, based on the position information of the worker U1 (S106).

For example, the identifying unit 240 identifies the second worker who is within a predetermined distance from the worker U1 based on the position information of the worker U1. Here, as an example, the identifying unit 240 identifies the worker U2 closest to the worker U1 as the second worker. Worker U2 is wearing the notification device 100b.

Further, the identification unit 240 may identify the second worker based on the attribute information of the worker U1. For example, the identifying unit 240 refers to the attribute information 291 and identifies the second worker who has attribute information that matches or is similar to the attribute information of the worker U1. The identifying unit 240 can identify the second worker on the condition that a plurality of pieces of attribute information such as the worker's work content and equipment content match or are similar.

The second notification control unit 250 issues a second notification to the identified second worker (S107). Specifically, the second notification control unit 250 generates warning information for performing the second notification, transmits it to the notification device 100b, and controls the notification device 100b to perform the second notification. The notification device 100b outputs, for example, a voice message such as "Worker U1 has been in the dangerous area a10 for more than X minutes. Please check the situation." from the speaker.

Note that the order of each step is not limited to that described above, and may be changed as appropriate. For example, before the determining unit 230 determines whether to perform the second notification (S104), the identifying unit 240 may identify the second worker (S106). By doing so, the determining unit 230 can also determine not to perform the second notification when the second worker is not present. Further, the management device 200 may store and accumulate records regarding the worker as work record information 294 in the storage unit 290, including the history of the processing shown in FIG.

As explained above, in the management system 1000 according to the present embodiment, a plurality of workers work while wearing the notification device 100, and each notification device 100 transmits the position information of the worker to the management device 200. .

In the management device 200, the location information acquisition unit 210 acquires the location information transmitted from the notification device 100. The first notification control unit 220 determines whether the worker has entered the dangerous area based on the acquired position information, and provides a first notification to the first worker who has entered the dangerous area. Thereby, the notification device 100 worn by the first worker performs the first notification by voice or the like.

Further, the determining unit 230 determines whether to perform the second notification based on the position information of the first worker after the first notification. The determining unit 230 can determine whether or not to issue the second notification based further on the time the first worker stays in the dangerous area and the direction of movement of the first worker.

Then, when the determining unit 230 determines to issue the second notification, the specifying unit 240 specifies the second worker to whom the second notification is to be sent, based on the position information of the first worker. For example, the identifying unit 240 identifies a worker within a predetermined distance from the first worker or a worker closest to the first worker as the second worker. Further, the identifying unit 240 can also identify the second worker based on the attribute information of the first worker. For example, the identification unit 240 identifies a second worker who has attribute information that matches or is similar to the attribute information of the first worker. The identification unit 240 can identify the second worker using a plurality of attribute information as identification conditions in addition to the worker's work details and equipment details. By doing so, the identifying unit 240 can identify the second worker who can more quickly and appropriately prepare to deal with the danger of the first worker.

When the second worker is identified, the second notification control unit 250 controls the notification device 100 worn by the second worker to issue a second notification. Thereby, the notification device 100 worn by the second worker issues the second notification by voice or the like, so that the second worker can notice the danger posed by the first worker. Therefore, the management device 200 notifies workers other than the first worker even if the first worker does not notice the first notification or is in a dangerous state where he or she cannot respond. be able to.

With such a configuration, the management system 1000 can improve the efficiency and safety of work at a construction site by visualizing the state of the workers and notifying the workers of danger. Furthermore, by continuing to record the location information of workers, the management system 1000 can contribute to improving efficiency and safety in a collaborative work environment with automatically controlled heavy machinery and robots that is envisioned in the future.

In addition, the management system 1000 can not only warn workers who do not notice warnings in dangerous areas, but also warn surrounding workers, thereby more reliably ensuring the safety of workers. It becomes possible to secure it. Therefore, the management system 1000 according to the present embodiment can appropriately notify workers of the danger that has occurred, and can realize safety management at the work site.

<Hardware configuration example>
Each of the functional components of the plurality of notification devices 100 and management device 200 described above may be realized by hardware (e.g., hard-wired electronic circuits) that implements each functional component, or by a combination of hardware and software. It may also be realized by a combination with hardware (for example, a combination of an electronic circuit and a program that controls it). For example, the present disclosure can also implement arbitrary processing by causing a CPU (Central Processing Unit) to execute a computer program.

The program includes instructions (or software code) that, when loaded into a computer, cause the computer to perform one or more of the functions described in the embodiments. The program may be stored on a non-transitory computer readable medium or a tangible storage medium. By way of example and not limitation, computer readable or tangible storage media may include random-access memory (RAM), read-only memory (ROM), flash memory, solid-state drive (SSD) or other memory technology, CD -Includes ROM, digital versatile disc (DVD), Blu-ray disc or other optical disc storage, magnetic cassette, magnetic tape, magnetic disc storage or other magnetic storage device. The program may be transmitted on a transitory computer-readable medium or a communication medium. By way of example and not limitation, transitory computer-readable or communication media includes electrical, optical, acoustic, or other forms of propagating signals.

Note that the present disclosure is not limited to the above embodiments, and can be modified as appropriate without departing from the spirit. In the above description, the case where the management system 1000 is used at a construction site is taken as an example, but the present invention is not limited to this. Management system 1000 may be used in various fields of managing user safety.

100, 100a to 100e Notification device 110 Location information detection section 120 Photographing section 130 Abnormality detection section 150 Notification section 170 Communication section 200 Management device 210 Location information acquisition section 220 First notification control section 230 Determination section 240 Specification section 250 Second notification control Section 260 Dangerous area setting section 270 Communication section 290 Storage section 291 Attribute information 2911 Worker ID
2912 Notification device ID
2913 Work details 2914 Equipment details 2915 Affiliation 2916 License 2917 Knowledge 292 Dangerous area information 2921 Dangerous area ID
2922 Dangerous area 2923 Danger content 2924 Danger level 293 Location information 2931 Location information ID
2932 Date and time 2933 Worker ID
2934 Location 294 Work record information 2941 Record ID
2942 Date and time 2943 Location 2944 Worker ID
2945 Contents 2946 Image information 1000 Management system a1, a2 Hazardous area a10, a20 Hazardous area N Network U1 to U5 Worker

Claims (5)

a position information acquisition unit that acquires position information of each of the plurality of workers;
a first notification control unit that determines whether the worker has entered a dangerous area based on the position information and provides a first notification to the first worker who has entered the dangerous area;
a determining unit that determines whether to perform a second notification based on the position information of the first worker after the first notification;
When it is determined to perform the second notification, a specifying unit that specifies a second worker who is a destination of the second notification based on the position information of the first worker;
A management device, comprising: a second notification control unit that performs the second notification to the second worker. The management device according to claim 1, wherein the determining unit further determines whether or not to perform the second notification based on the stay time of the first worker in the dangerous area. The management device according to claim 1 or 2, wherein the determining unit further determines whether or not to perform the second notification based on the moving direction of the first worker. The management device according to claim 1, wherein the identifying unit identifies the second worker who is within a predetermined distance from the first worker. The computer is
a position information acquisition step of acquiring position information of each of the plurality of workers;
a first notification control step of determining whether or not the worker has entered a dangerous area based on the position information, and providing a first notification to the first worker who has entered the dangerous area;
a determining step of determining whether to perform a second notification based on the position information of the first worker after the first notification;
When it is determined to perform the second notification, a specifying step of specifying a second worker who is a destination of the second notification based on the position information of the first worker;
A second notification control step of giving the second notification to the second worker.

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