Display control device, display method and program

Abstract

A display controller is provided which makes it possible to understand the position of a work subject, even when infrastructure is not developed. A display controller (10) has a position calculation unit (12) and a display control unit (14). The position calculation unit (12) uses distance measurement result information that indicates the results of measuring the distance between multiple detection devices (2) to calculate the positions of the multiple work subjects (6) with respect to a reference point. The display control unit (14) performs control so as to display position information indicating the positions of one or more of the work subjects (6) on a mask (4) worn by a worker.

Description

[Technical field]

[0001] The present invention relates to a display control device. ,table Method of showing and program Regarding. [Background technology]

[0002] Patent Document 1 discloses a comprehensive disaster prevention system that supports the evacuation of workers and firefighters who are engaged in extinguishing a fire in an underground waste management plant when a fire breaks out. The system in Patent Document 1 includes a plant monitoring panel, a video control panel, a location monitoring panel that identifies the current location through communication between a PHS carried by personnel and a base station, and a maintenance information terminal having a small camera and a display screen. The system in Patent Document 1 also includes a comprehensive disaster prevention display panel that receives emergency equipment operation information from the plant monitoring panel and location information from the location monitoring panel, and displays this information on a CRT display together with previously prepared plant drawing information. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2005-115796 A Summary of the Invention [Problem to be solved by the invention]

[0004] In the technology disclosed in Patent Document 1, the current location of a worker is identified through communication between a PHS carried by the worker and a base station previously installed in the factory. In other words, in the technology disclosed in Patent Document 1, the location of a worker (worker) such as a firefighter cannot be identified unless a base station is installed at the site. Therefore, in the technology disclosed in Patent Document 1, it is difficult to grasp the location of a worker such as a firefighter unless infrastructure is in place.

[0005] The object of the present disclosure has been made to solve such problems, and is to provide a display control device, a display system, a display method, and a program that make it possible to grasp the location of a work subject even when the infrastructure is not in place. [Means for solving the problem]

[0006] The display control device disclosed herein has a position calculation means that calculates the position of each of multiple work subjects relative to a reference point using distance measurement result information indicating the results of distance measurement performed by transmitting and receiving radio waves between multiple detection devices worn by each of multiple work subjects performing work on site, and a display control means that controls a facepiece worn by the worker who is the work subject to display position information indicating the positions of one or more of the work subjects.

[0007] In addition, the display system disclosed herein comprises a plurality of detection devices respectively worn by a plurality of work subjects performing work on site, a facepiece worn by the workers who are the work subjects, and a display control device, wherein each of the plurality of detection devices measures distances between itself and the other detection devices by transmitting and receiving radio waves between itself and the other detection devices, and the display control device comprises a position calculation means for calculating the position of each of the plurality of work subjects relative to a reference point using distance measurement result information indicating the results of the distance measurement, and a display control means for controlling the facepiece worn by the workers who are the work subjects to display position information indicating the positions of one or more of the work subjects, and the facepiece displays the position information of the work subjects in accordance with the control of the display control device.

[0008] In addition, the display method disclosed herein uses distance measurement result information indicating the results of distance measurement performed by transmitting and receiving radio waves between multiple detection devices worn by multiple work subjects performing work on site, to calculate the position of each of the multiple work subjects relative to a reference point, and performs control to display position information indicating the positions of one or more of the work subjects on a face mask worn by the worker who is the work subject.

[0009] In addition, the program disclosed herein causes a computer to execute the steps of: calculating the position of each of multiple work subjects relative to a reference point using distance measurement result information indicating the results of distance measurement performed by transmitting and receiving radio waves between multiple detection devices worn by each of multiple work subjects performing work on site; and controlling a facepiece worn by the worker who is the work subject to display position information indicating the positions of one or more of the work subjects. Effect of the Invention

[0010] According to the present disclosure, it is possible to provide a display control device, a display system, a display method, and a program that make it possible to grasp the location of a worker even when the infrastructure is not in place. [Brief description of the drawings]

[0011] [Figure 1] 1 is a diagram illustrating an overview of a display system according to an embodiment of the present disclosure. [Diagram 2] 1 is a flowchart illustrating a display method executed by a display control device according to an embodiment of the present disclosure. [Diagram 3] FIG. 1 illustrates a display system according to a first embodiment. [Figure 4] FIG. 2 is a diagram illustrating a hardware configuration of an information processing device installed in the device according to the first embodiment. [Diagram 5] FIG. 1 is a diagram showing a configuration of a detection device according to a first embodiment. [Figure 6] 4 is a diagram for explaining distance measurement between detection devices in the display system according to the first embodiment. FIG. [Figure 7] FIG. 2 is a diagram showing a configuration of a face piece according to the first embodiment. [Figure 8] FIG. 2 is a diagram showing a configuration of a face piece according to the first embodiment. [Figure 9] 13 is a diagram illustrating a platoon leader screen displayed by the monitoring device according to the first embodiment; FIG. [Figure 10] FIG. 1 is a diagram illustrating a configuration of a display control device according to a first embodiment. [Figure 11] 4 is a flowchart showing a display method executed by the display system according to the first embodiment. [Figure 12] FIG. 1 illustrates an example of a scene where personnel are present. [Figure 13] 4 is a diagram illustrating an example of a position information display screen displayed under the control of the display control device according to the first embodiment; FIG. [Figure 14] 14 is a diagram illustrating a state in which a divided area is displayed on the position information display screen illustrated in FIG. 13. FIG. [Figure 15] 14 is a diagram illustrating a state in which the position information display screen illustrated in FIG. 13 is displayed on a team member screen. FIG. [Figure 16] 15 is a diagram illustrating a state in which map information is not displayed on the location information display screen illustrated in FIG. 14. FIG. [Figure 17] 14 is a diagram illustrating a state in which an evacuation route is displayed on the position information display screen illustrated in FIG. 13. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] (Summary of the embodiment of the present disclosure) Prior to describing the embodiments of the present disclosure, an overview of the embodiments of the present disclosure will be described. Fig. 1 is a diagram showing an overview of a display system 1 according to the embodiments of the present disclosure.

[0013] The display system 1 includes a plurality of detection devices 2, a face piece 4, and a display control device 10. The plurality of detection devices 2 are respectively attached to a plurality of work subjects 6 performing work on-site. The work subjects include workers and non-human mobile objects. Each of the plurality of detection devices 2 measures the distance to the other detection devices 2 by transmitting and receiving radio waves to and from the other detection devices 2.

[0014] The facepiece 4 is worn by a worker who is a work subject 6. For example, when the work site is a fire site, the worker is, for example, a firefighter. However, the worker is not limited to a firefighter. The worker can be changed as appropriate depending on the type of the work site. For example, the worker may be a police officer, a member of the Self-Defense Forces, a rescue team member, a construction site worker, a nuclear power plant worker, a warehouse worker, an airport worker, a mall worker, etc. In other words, the facepiece 4 according to this embodiment can be worn by various workers. Below, an example in which the worker (work subject) is a firefighter may be described as appropriate.

[0015] The display control device 10 may be configured, for example, as a computer (information processing device). The display control device 10 may be communicably connected to the detection device 2, for example, via a network. The display control device 10 includes a position calculation unit 12 and a display control unit 14.

[0016] FIG. 2 is a flowchart showing a display method executed by the display control device 10 according to the embodiment of the present disclosure. The position calculation unit 12 calculates the position of each of the multiple work subjects 6 relative to the reference point using distance measurement result information indicating the result of distance measurement between the multiple detection devices 2 (step S12). Preferably, the position calculation unit 12 calculates the position of each of the multiple work subjects 6 relative to the reference point based on the relative positions between the multiple detection devices 2 obtained using the distance measurement result information indicating the result of distance measurement between the multiple detection devices 2. The display control unit 14 performs control so that the facepiece 4 worn by the worker is caused to display position information indicating the positions of one or more work subjects 6 (step S14). For example, the display control unit 14 performs control so that the facepiece 4 worn by the worker is caused to display position information indicating the positions of one or more work subjects 6 including at least the worker. As a result, the position information of the work subjects 6 is displayed on the facepiece 4 worn by the worker.

[0017] In general, it is difficult for a commander (such as a fire brigade chief) who is commanding an indoor scene from outdoors to grasp the location of the workers (team members, main workers) working at the scene. Therefore, the commander often grasps the location of the team members using voice information by radio or camera images. On the other hand, when visibility cannot be secured due to collapse of infrastructure or smoke, it is difficult to grasp the location of the team members using only voice information and camera images. In addition, team members themselves may not be able to grasp their own or other team members' locations while working at the scene. In this case, as in the above case, it is difficult for team members themselves to grasp their own or other team members' locations using only voice information and camera images.

[0018] As described above, the technology disclosed in Patent Document 1 can grasp the positions of personnel in a building using a base station that is installed in advance in the building for position location. However, as described above, the technology disclosed in Patent Document 1 requires the preparation of infrastructure such as the installation of a base station in advance. Furthermore, at disaster sites, etc., there is a possibility that infrastructure will collapse due to the collapse of buildings, etc. Therefore, it is desirable to grasp the positions of workers (work subjects) even if infrastructure for position location is not prepared.

[0019] The display system 1 (display control device 10) according to this embodiment is configured to calculate the position of each of a plurality of work subjects 6 (workers, team members) relative to a reference point using the results of distance measurement between a plurality of detection devices 2. Therefore, even if infrastructure is not in place, the position of the work subject can be identified. Furthermore, the display system 1 (display control device 10) according to this embodiment is configured to perform control so that position information indicating the position of one or more work subjects 6 is displayed on the face piece 4 worn by the worker. Therefore, even if infrastructure is not in place, the worker can grasp the position of the work subject. Furthermore, by displaying the position information on the commander's terminal, the commander can grasp the position of the work subject even if infrastructure is not in place.

[0020] In addition, in the technology of Patent Document 1, since positioning (measurement) is performed via a base station, the response of positioning may be delayed depending on the network environment and the processing capacity of the server. Here, since real-time performance is required at disaster sites, it is undesirable for delays to occur when locating the positions of team members. In contrast, in the present embodiment, positioning is performed without going through infrastructure facilities such as a base station, so it is possible to suppress delays from occurring during positioning.

[0021] There is also an infrastructure-free indoor positioning technology that utilizes geomagnetism. However, this technology requires prior environmental survey, such as creating a geomagnetic map of the environment, which is time-consuming. In contrast, in this embodiment, the position of the team members is determined using the results of distance measurement performed by transmitting and receiving radio waves between multiple detection devices attached to each worker, so no prior preparation is required.

[0022] (Embodiment 1) Hereinafter, the embodiments will be described with reference to the drawings. For clarity of explanation, the following description and drawings are omitted and simplified as appropriate. In addition, in each drawing, the same elements are given the same reference numerals, and duplicate explanations are omitted as necessary.

[0023] Fig. 3 is a diagram showing a display system 20 according to the first embodiment. Display system 20 corresponds to display system 1 shown in Fig. 1. Display system 20 includes anchor point 30, a monitoring device 40, a plurality of worker devices 50, and a display control device 100. Although four worker devices 50A to 50D are shown in Fig. 3, the number of worker devices 50 may be any number equal to or greater than two.

[0024] Each of the multiple worker equipment 50 has a control device 52, a detection device 60, and a facepiece 70. The control device 52, the detection device 60, and the facepiece 70 may be physically separate from one another. The detection device 60 corresponds to the detection device 2 shown in FIG. 1. The facepiece 70 corresponds to the facepiece 4 shown in FIG. 1. The worker equipment 50 (control device 52, detection device 60, and facepiece 70) is worn by a worker (team member). The control device 52 and the detection device 60 are provided at any location on the team member (for example, below an air cylinder carried by the team member on his / her back). The facepiece 70 is worn on the team member's head.

[0025] Furthermore, worker equipment 50A (control device 52A, detection device 60A, and face piece 70A) is worn by worker A. Furthermore, worker equipment 50B (control device 52B, detection device 60B, and face piece 70B) is worn by worker B. Furthermore, worker equipment 50C (control device 52C, detection device 60C, and face piece 70C) is worn by worker C. Furthermore, worker equipment 50D (control device 52D, detection device 60D, and face piece 70D) is worn by worker D. That is, in the example of FIG. 3, four workers A to D are working at the site.

[0026] The control device 52 is, for example, a control box. The control device 52 controls the operation of the detection device 60 and the face 70. The control device 52 may perform processing necessary for communication when the detection device 60 and the face 70 communicate with the display control device 100. The control device 52 may also communicate with the display control device 100 when the detection device 60 and the face 70 do not have a communication function. The control device 52 also generates a screen that displays information necessary for the worker's work. Then, the control device 52 causes the face 70 to display the screen. At that time, the control device 52 may communicate with the display control device 100 and cause the face 70 to display the screen under the control of the display control device 100.

[0027] As described above with reference to FIG. 1 and the like, each of the multiple detection devices 60 measures the distance between the other detection devices 60 by transmitting and receiving radio waves between the detection devices 60. Specifically, the detection device 60 transmits and receives radio waves (UWB radio waves) by a UWB (Ultra Wide Band) wireless system between the other detection devices 60. Although the communication range of the UWB wireless system is short distance (a radius of about 10 m), it can be used for distance measurement. In this way, the detection device 60 measures the distance between the other detection devices 60 in the vicinity. For example, the detection device 60A measures the distance between the detection device 60A and the detection device 60B by transmitting and receiving radio waves between the detection device 60A and the detection device 60B.

[0028] The facepiece 70 includes an air mask and a transparent window (face shield). The facepiece 70 (or the detection device 60) may also include a gas sensor and a temperature sensor. Furthermore, the facepiece 70 functions as a smart mask. That is, the facepiece 70 displays necessary information so that the personnel can visually confirm it. As described above with reference to FIG. 1 and the like, the facepiece 70 displays the position information of the personnel (workers, main operators). At that time, the facepiece 70 displays the position information of the personnel (workers, main operators) under the control of the display control device 100, as described below. The detection device 60 and the facepiece 70 will be described later.

[0029] The display control device 100 corresponds to the display control device 10 shown in Fig. 1. The display control device 100 is a computer such as a personal computer or a server. The display control device 100 is communicatively connected to the anchor point 30 and the monitoring device 40 via a wired or wireless connection. The display control device 10 is communicatively connected to the monitoring device 40 via a network 22 such as a WLAN (Wireless Local Area Network).

[0030] Furthermore, the display control device 100 is communicatively connected to the worker device 50 (the control device 52, the detection device 60, and the face piece 70) wirelessly. Specifically, the display control device 100 is communicatively connected to the worker device 50 by a wireless communication technology that enables long-distance communication (transmission of signals over a distance of several kilometers to several tens of kilometers), such as LPWA (Low Power Wide Area).

[0031] Similar to the above-mentioned display control device 10, the display control device 100 calculates the position of each of the multiple team members relative to a reference point based on the relative positions between the multiple detection devices 60 obtained using distance measurement result information indicating the results of distance measurement between the multiple detection devices 60. The display control device 100 also performs control so that the face piece 70 displays position information indicating the positions of the team members. The display control device 100 also performs control so that the monitoring device 40 displays position information of the team members. This will be described in detail later.

[0032] The anchor point 30 serves as a reference point when locating (measuring) the positions of the team members A to D (workers, main workers). That is, the positions of the team members A to D are calculated using the anchor point 30 as a reference point. In other words, when locating the positions of the team members A to D, the absolute positions of the team members A to D are calculated in a coordinate system (coordinate space) whose origin is the position of the anchor point 30. The anchor point 30 is set by the team members, for example, near the entrance to the work site.

[0033] The anchor point 30 is, for example, a UWB anchor. The anchor point 30 measures the distance between itself and a nearby detection device 60 by transmitting and receiving radio waves between itself and the nearby detection device 60. Specifically, the anchor point 30 transmits and receives UWB radio waves between itself and the nearby detection device 60. As a result, the detection device 60 measures the distance between itself and the nearby detection device 60. For example, the anchor point 30 measures the distance between itself and the detection device 60A by transmitting and receiving radio waves between itself and the nearby detection device 60A.

[0034] The monitoring device 40 is operated by a commander (captain) of the team members. The monitoring device 40 may be placed at a location away from the site. The monitoring device 40 may be, for example, a laptop computer or a tablet terminal. As described below, the monitoring device 40 displays location information of team members (workers, main operators of work) under the control of the display control device 100. Furthermore, the monitoring device 40 may display the activity status (work status) of team members in addition to the location information. Details of the screens displayed on the monitoring device 40 will be described later.

[0035] Furthermore, the monitoring device 40 generates a message in response to an operation by the commander. The generated message is transmitted to the worker device 50 (the control device 52 or the facepiece 70) by the display control device 100. As a result, as will be described later, the facepiece 70 displays the message in a manner that is visible to the worker.

[0036] 4 is a diagram showing a hardware configuration of an information processing device 101 installed in the device according to the first embodiment. The information processing device 101 has a function as a computer. The information processing device 101 can be installed in the display control device 100, the monitoring device 40, and the worker device 50 (the control device 52, the detection device 60, and the face piece 70).

[0037] The information processing device 101 has, as its main hardware components, a control unit 102, a storage unit 104, a communication unit 106, and an interface unit 108 (IF; Interface). The control unit 102, the storage unit 104, the communication unit 106, and the interface unit 108 are connected to each other via a data bus or the like.

[0038] The control unit 102 is a processor such as a CPU (Central Processing Unit). The control unit 102 has a function as a calculation device that performs control processing and calculation processing. The storage unit 104 is a storage device such as a memory or a hard disk. The storage unit 104 is, for example, a ROM (Read Only Memory) or a RAM (Random Access Memory). The storage unit 104 has a function for storing a control program and a calculation program executed by the control unit 102. The storage unit 104 also has a function for temporarily storing processing data and the like. The storage unit 104 may include a database.

[0039] The communication unit 106 performs processing necessary for communicating with other devices. The communication unit 106 may include a communication port, a router, a firewall, etc. The interface unit 108 is, for example, a user interface (UI). The interface unit 108 has an input device such as a keyboard, a touch panel, or a mouse, and an output device such as a display or a speaker. The interface unit 108 accepts data input operations by the user and outputs information to the user.

[0040] 5 is a diagram showing a configuration of a detection device 60 according to the first embodiment. The detection device 60 includes a UWB module 62, an inertial measurement unit 64, and an air pressure sensor 66. The UWB module 62, the inertial measurement unit 64, and the air pressure sensor 66 may be physically separated from each other.

[0041] The UWB module 62 transmits UWB radio waves to the nearby detection device 60. The UWB module 62 also receives UWB radio waves transmitted from the nearby detection device 60. As a result, the UWB module 62 measures (estimates) the distance to the nearby detection device 60. Specifically, the UWB module 62 measures the distance by measuring the propagation time of the pulse of the UWB radio waves to the nearby detection device 60 using a TOA (Time Of Arrival) technique. The UWB module 62 (detection device 60) generates distance measurement result information including distance information indicating the distance to the nearby detection device 60 and identification information of the nearby detection device 60. The anchor point 30 may also have a function similar to that of the UWB module 62. The distance measurement result information may also include information indicating the direction of the radio waves of the UWB module 62. In other words, the ranging result information may indicate the direction of radio waves transmitted by the UWB module 62 to the UWB module 62 of another detection device 60, or the direction of radio waves received by the UWB module 62 from the UWB module 62 of another detection device 60.

[0042] The inertial measurement unit 64 is, for example, an IMU (Internal Measurement Unit). The inertial measurement unit 64 includes, for example, an acceleration sensor and a gyro sensor. The inertial measurement unit 64 detects the attitude of the team member, that is, the direction in which the team member is facing, by measuring the angular velocity and acceleration of the team member. The inertial measurement unit 64 generates IMU information indicating the detection result.

[0043] The air pressure sensor 66 measures the air pressure in the surrounding environment. The air pressure sensor 66 generates air pressure information that is the measurement result. As described below, the air pressure information can be used to identify (estimate) the floor level of the location where the team member is located.

[0044] The control device 52 transmits the detection information generated by the detection device 60 to the display control device 100. In other words, the detection device 60 transmits the detection information to the display control device 100 via the control device 52. If the detection device 60 has a communication function, the detection device 60 may transmit the detection information to the display control device 100. The detection information includes distance measurement result information, IMU information, and air pressure information. The control device 52 (or the detection device 60) transmits the detection information to the display control device 100 by a long-distance communication technology such as LPWA. The control device 52 also generates a screen to be displayed on a head-up display 74 (described later) under the control of the display control device 100.

[0045] 6 is a diagram for explaining distance measurement between the detection devices 60 in the display system 20 according to the first embodiment. Here, the anchor point 30 serves as a reference point and corresponds to the origin (0,0) in the XY coordinate system.

[0046] When the UWB module of the anchor point 30 transmits UWB radio waves to the nearby detection device 60A (transmits and receives UWB radio waves with the nearby detection device 60A), the anchor point 30 (UWB module) measures the distance to the detection device 60A. Here, "nearby" means close enough (for example, about 10m to 20m) that the UWB radio waves can reach. Then, the anchor point 30 (UWB module) generates distance measurement result information "An→A" including distance information indicating the distance to the detection device 60A and identification information of the detection device 60A (worker A). The anchor point 30 may obtain the identification information of the detection device 60A (worker A) by receiving UWB radio waves indicating the identification information of the detection device 60A (worker A) from the detection device 60A. The anchor point 30 may obtain distance information indicating the distance to the detection device 60A by receiving UWB radio waves indicating the distance to the detection device 60A from the detection device 60A.

[0047] Similarly, when the UWB module 62 of the detection device 60A transmits UWB radio waves to a nearby anchor point 30 (transmits and receives UWB radio waves to and from the nearby anchor point 30), the UWB module 62 of the detection device 60A measures the distance to the anchor point 30. Then, the UWB module 62 of the detection device 60A generates distance measurement result information "A→An" including distance information indicating the distance to the anchor point 30 and identification information of the anchor point 30. The detection device 60A may obtain the identification information of the anchor point 30 by receiving UWB radio waves indicating the distance to the anchor point 30 from the anchor point 30. The detection device 60A may obtain the distance information indicating the distance to the anchor point 30 by receiving UWB radio waves indicating the distance from the anchor point 30 to the anchor point 30. The distance information indicated by the distance measurement result information "A→An" may be approximately (substantially) the same as the distance information indicated by the distance measurement result information "An→A".

[0048] Furthermore, when the UWB module 62 of the detection device 60A transmits UWB radio waves to the nearby detection device 60B (transmits and receives UWB radio waves to the nearby detection device 60B), the UWB module 62 of the detection device 60A measures the distance to the detection device 60B. Then, the UWB module 62 of the detection device 60A generates distance measurement result information "A→B" including distance information indicating the distance to the detection device 60B and identification information of the detection device 60B (team member B). The detection device 60A may obtain the identification information of the detection device 60B (team member B) by receiving UWB radio waves indicating the identification information of the detection device 60B (team member B) from the detection device 60B. The detection device 60A may obtain distance information indicating the distance to the detection device 60B by receiving UWB radio waves indicating the distance to the detection device 60B from the detection device 60B.

[0049] Similarly, when the UWB module 62 of the detection device 60B transmits UWB radio waves to the nearby detection device 60A (transmits and receives UWB radio waves with the nearby detection device 60A), the UWB module 62 of the detection device 60B measures the distance to the detection device 60A. Then, the UWB module 62 of the detection device 60B generates distance measurement result information "B→A" including distance information indicating the distance to the detection device 60A and identification information of the detection device 60A (team member A). The detection device 60B may obtain the identification information of the detection device 60A (team member A) by receiving UWB radio waves indicating the identification information of the detection device 60A (team member A) from the detection device 60A. The detection device 60B may obtain distance information indicating the distance to the detection device 60A by receiving UWB radio waves indicating the distance to the detection device 60A from the detection device 60A. Note that the distance information indicated by the distance measurement result information "B→A" may be approximately (substantially) the same as the distance information indicated by the distance measurement result information "A→B".

[0050] Furthermore, when the UWB module 62 of the detection device 60B transmits UWB radio waves to the nearby detection device 60C (transmits and receives UWB radio waves to and from the nearby detection device 60C), the UWB module 62 of the detection device 60B measures the distance to the detection device 60C. Then, the UWB module 62 of the detection device 60B generates distance measurement result information "B→C" including distance information indicating the distance to the detection device 60C and identification information of the detection device 60C (team member C). The detection device 60B may obtain the identification information of the detection device 60C (team member C) by receiving UWB radio waves indicating the identification information of the detection device 60C (team member C) from the detection device 60C. The detection device 60B may obtain distance information indicating the distance to the detection device 60C by receiving UWB radio waves indicating the distance to the detection device 60C from the detection device 60C.

[0051] Similarly, when the UWB module 62 of the detection device 60C transmits UWB radio waves to the nearby detection device 60B (transmits and receives UWB radio waves to the nearby detection device 60B), the UWB module 62 of the detection device 60C measures the distance to the detection device 60B. Then, the UWB module 62 of the detection device 60C generates distance measurement result information "C→B" including distance information indicating the distance to the detection device 60B and identification information of the detection device 60B (team member B). The detection device 60C may obtain the identification information of the detection device 60B (team member B) by receiving UWB radio waves indicating the identification information of the detection device 60B (team member B) from the detection device 60B. The detection device 60C may obtain distance information indicating the distance to the detection device 60B by receiving UWB radio waves indicating the distance to the detection device 60B from the detection device 60B. Note that the distance information indicated by the distance measurement result information "C→B" may be approximately (substantially) the same as the distance information indicated by the distance measurement result information "B→C".

[0052] Furthermore, when the UWB module 62 of the detection device 60B transmits UWB radio waves to the nearby detection device 60D (transmits and receives UWB radio waves to and from the nearby detection device 60D), the UWB module 62 of the detection device 60B measures the distance to the detection device 60D. Then, the UWB module 62 of the detection device 60B generates distance measurement result information "B→D" including distance information indicating the distance to the detection device 60D and identification information of the detection device 60D (team member D). The detection device 60B may obtain the identification information of the detection device 60D (team member D) by receiving UWB radio waves indicating the identification information of the detection device 60D (team member D) from the detection device 60D. The detection device 60B may obtain distance information indicating the distance to the detection device 60D by receiving UWB radio waves indicating the distance to the detection device 60D from the detection device 60D.

[0053] Similarly, when the UWB module 62 of the detection device 60D transmits UWB radio waves to the nearby detection device 60B (transmits and receives UWB radio waves to the nearby detection device 60B), the UWB module 62 of the detection device 60D measures the distance to the detection device 60B. Then, the UWB module 62 of the detection device 60D generates distance measurement result information "D→B" including distance information indicating the distance to the detection device 60B and identification information of the detection device 60B (team member B). The detection device 60D may obtain the identification information of the detection device 60B (team member B) by receiving UWB radio waves indicating the identification information of the detection device 60B (team member B) from the detection device 60B. The detection device 60D may obtain distance information indicating the distance to the detection device 60B by receiving UWB radio waves indicating the distance to the detection device 60B from the detection device 60B. Note that the distance information indicated by the distance measurement result information "D→B" may be approximately (substantially) the same as the distance information indicated by the distance measurement result information "B→D".

[0054] Furthermore, when the UWB module 62 of the detection device 60C transmits UWB radio waves to the nearby detection device 60D (transmits and receives UWB radio waves to and from the nearby detection device 60D), the UWB module 62 of the detection device 60C measures the distance to the detection device 60D. Then, the UWB module 62 of the detection device 60C generates distance measurement result information "C→D" including distance information indicating the distance to the detection device 60D and identification information of the detection device 60D (worker D). The detection device 60C may obtain the identification information of the detection device 60D (worker D) by receiving UWB radio waves indicating the identification information of the detection device 60D (worker D) from the detection device 60D. The detection device 60C may obtain distance information indicating the distance to the detection device 60D by receiving UWB radio waves indicating the distance to the detection device 60D from the detection device 60D.

[0055] Similarly, when the UWB module 62 of the detection device 60D transmits UWB radio waves to the nearby detection device 60C (transmits and receives UWB radio waves to and from the nearby detection device 60C), the UWB module 62 of the detection device 60D measures the distance to the detection device 60C. Then, the UWB module 62 of the detection device 60D generates distance measurement result information "D→C" including distance information indicating the distance to the detection device 60C and identification information of the detection device 60C (team member C). The detection device 60D may obtain the identification information of the detection device 60C (team member C) by receiving UWB radio waves indicating the identification information of the detection device 60C (team member C) from the detection device 60C. The detection device 60D may obtain distance information indicating the distance to the detection device 60C by receiving UWB radio waves indicating the distance to the detection device 60C from the detection device 60C. Note that the distance information indicated by the distance measurement result information "D→C" may be approximately (substantially) the same as the distance information indicated by the distance measurement result information "C→D".

[0056] The inertial measurement unit 64 of the detection device 60A detects the IMU that indicates the direction in which the team member A is facing, and generates IMU information. The air pressure sensor 66 of the detection device 60A measures the air pressure in the environment around the team member A, and generates air pressure information. The detection device 60A then transmits detection information Dt_A, which includes the obtained distance measurement result information, IMU information, and air pressure information, to the display control device 100, for example, by LPWA or the like.

[0057] The inertial measurement unit 64 of the detection device 60B detects an IMU indicating the direction in which the team member B is facing, and generates IMU information. The air pressure sensor 66 of the detection device 60B measures the air pressure in the environment around the team member B, and generates air pressure information. The detection device 60B then transmits detection information Dt_B, which includes the obtained distance measurement result information, IMU information, and air pressure information, to the display control device 100, for example, by LPWA or the like.

[0058] The inertial measurement unit 64 of the detection device 60C detects the IMU indicating the direction in which the team member C is facing, and generates IMU information. The air pressure sensor 66 of the detection device 60C measures the air pressure in the environment around the team member C, and generates air pressure information. The detection device 60C then transmits detection information Dt_C, which includes the obtained distance measurement result information, IMU information, and air pressure information, to the display control device 100, for example, by LPWA or the like.

[0059] The inertial measurement unit 64 of the detection device 60D detects the IMU that indicates the direction in which the team member D is facing, and generates IMU information. The air pressure sensor 66 of the detection device 60D measures the air pressure in the environment around the team member D, and generates air pressure information. The detection device 60D then transmits detection information Dt_D, which includes the obtained distance measurement result information, IMU information, and air pressure information, to the display control device 100, for example, by LPWA or the like.

[0060] 7 and 8 are diagrams showing the configuration of a face piece 70 according to the first embodiment. The face piece 70 has an imaging device 72, a head-up display (HUD) 74, an audio input / output device 76, and an operation switch 78. The audio input / output device 76 has a microphone 76a and a speaker 76b.

[0061] The imaging device 72 may have at least one of the functions of an infrared camera and a visible camera, for example. The imaging device 72 captures an image of the surrounding environment, such as the area in front of a team member (worker) wearing the facepiece 70. The imaging device 72 generates captured images (moving images or still images). The imaging device 72, which is an infrared camera, may be used, for example, at a site in a dark environment. The imaging device 72, which is a visible camera, may be used, for example, at a site in a bright environment.

[0062] The head-up display 74 displays information necessary for the work of the team member (worker) wearing the facepiece 70 so that it can be seen by the team member (worker). Therefore, the head-up display 74 displays a team member screen 80 that shows information necessary for the work of the team member. As illustrated in FIG. 8, the head-up display 74 displays a virtual image of the team member screen 80 in front of the team member (worker) wearing the facepiece 70. Note that in the example of FIG. 8, for convenience of explanation, the front of the facepiece 70 and the team member screen 80, which is a virtual image, face in the same direction (toward the viewer on the page); however, in reality, the team member screen 80, which is a virtual image, is displayed so as to face the front of the facepiece 70.

[0063] Specifically, the head-up display 74 may have a reflective translucent member such as a combiner. For example, a screen generated by the control device 52 (control unit 102) of the worker device 50 may be projected onto the combiner by a known optical system. This projected screen is reflected (further enlarged) by the combiner and reaches the eyes of the worker wearing the facepiece 70. As a result, the worker wearing the facepiece 70 visually recognizes the screen as a virtual image that is enlarged and appears in front (for example, 1.5 m in front). As a result, the image (virtual image) overlaps with the field of view of the worker wearing the facepiece 70, so the worker can visually recognize the image (virtual image) without moving his or her line of sight. Note that a known optical system can be used for projecting the virtual image, so a description thereof will be omitted. Note that the head-up display 74 may display a virtual image by projecting an image onto any part of the transparent window 70a of the facepiece 70.

[0064] As illustrated in FIG. 8, the team member screen 80 displayed as a virtual image includes a captured image display area 81, an entry elapsed time display area 82, an air cylinder residual pressure display area 83, and a message display area 84. The captured image display area 81 displays an image captured by an imaging device 72 provided on a facepiece 70 worn by the team member or another team member. That is, the captured image display area 81 displays an image captured by an imaging device 72 provided on a facepiece 70 (the team member's own facepiece 70) that displays the team member screen 80, or an image captured by an imaging device 72 provided on a facepiece 70 of another team member. When an image captured by an imaging device 72 provided on a facepiece 70 of another team member is displayed, the identification information, name, location information, shooting time information, etc. of the team member may be displayed together. At this time, the location information may be information indicating the rough location of the team member. The entry elapsed time display area 82 displays the time that has elapsed since the team member entered a scene such as a fire scene. The remaining amount (pressure) of the air cylinder worn by the team member is displayed in the air cylinder remaining pressure display area 83. The message display area 84 displays a message generated by the team leader (commander) operating the monitoring device 40, or a message automatically generated according to the situation at the site, etc. For example, the message display area 84 may display a message generated by the display control device 100.

[0065] The audio input / output device 76 inputs and outputs audio. Preferably, the audio input / output device 76 inputs and outputs audio by bone conduction. The microphone 76a inputs audio uttered by a team member wearing the facepiece 70 and generates audio information (team member audio information) indicating the team member's audio. The generated team member audio information is transmitted by the control device 52 to the display control device 100 (or the monitoring device 40 or the leader's wireless terminal). Preferably, the microphone 76a is a bone conduction microphone that inputs audio by bone conduction.

[0066] The speaker 76b outputs the voice of the captain etc. so that it can be heard by the team member wearing the facepiece 70. Note that audio information indicating the voice of the captain etc. (captain audio information) may be generated by the monitoring device 40 (or the captain's wireless terminal) and transmitted to the control device 52 (or the facepiece 70) by the display control device 100 (or the monitoring device 40 or the captain's wireless terminal). Note that the speaker 76b is preferably a bone conduction speaker that outputs audio by bone conduction.

[0067] When a team member wears a face mask, there is a possibility that the team member cannot hear the voice of the radio in a noisy scene. Therefore, there is a possibility that the team member and the team leader cannot talk by voice. In response to this, the voice input / output device 76 according to the present embodiment inputs and outputs voice by bone conduction. This allows the team member and the team leader to talk by voice.

[0068] The operation switch 78 is operated by a team member. The operation switch 78 is, for example, a push button type switch. The operation switch 78 may be used to switch the display mode of the screen viewed by the team member wearing the facepiece 70. For example, when the operation switch 78 is pressed once, images displayed in the entry elapsed time display area 82, the air cylinder remaining pressure display area 83, and the message display area 84 may be displayed. When the operation switch 78 is pressed twice, images displayed in the captured image display area 81 and the message display area 84 may be displayed. When the operation switch 78 is pressed three times, the location information of the team member may be displayed. When the operation switch 78 is pressed and held down, an emergency message may be transmitted to notify the team member of an abnormality.

[0069] 9 is a diagram illustrating a leader screen 90 displayed by the monitoring device 40 according to the first embodiment. The leader screen 90 is displayed on a display (interface unit 108) of the monitoring device 40. As illustrated in FIG. 9, the leader screen 90 includes, for example, a map display area 91, a message transmission area 92, and an activity status display area 93.

[0070] For example, map information of a site such as a disaster site is displayed in the map display area 91. The map information is, for example, a map of the site, a floor map of a building that is the site, etc. The map information may also be a photograph of the site (such as an aerial photograph).

[0071] In the message transmission area 92, for example, a message (e.g., a message of high urgency) that the team leader sends to the team members is displayed. The team leader operates the monitoring device 40 to generate a message, and the message is displayed in the message transmission area 92. The team leader can also send a message by operating a send button displayed in the message transmission area 92 through a GUI (Graphical User Interface). In this case, message information indicating the message is sent to the display control device 100, and the display control device 100 performs control so that the message is displayed on the face 70 (message display area 84). As a result, the message is displayed in the message display area 84 of the team member screen 80.

[0072] The activity status display area 93 displays the activity status of each team member. In the example of Fig. 9, the activity status display area 93 displays an activity status image 94A showing the activity status of team member A, an activity status image 94B showing the activity status of team member B, an activity status image 94C showing the activity status of team member C, and an activity status image 94D showing the activity status of team member D.

[0073] Each activity status image 94 may display the same image as the image (team member screen 80) displayed by the facepiece 70 worn by the corresponding team member. Each activity status image 94 includes an image captured by the imaging device 72 of the facepiece 70 worn by the corresponding team member. The activity status display area 93 (each activity status image 94) may display personal information of the team member (such as name and blood type). By operating the team leader screen 90 via the GUI, it is also possible to select an arbitrary team member and record the activity status image 94 in order to review the situation later. By operating the team leader screen 90 via the GUI, the captured image included in the activity status image 94 may be zoomed in.

[0074] Furthermore, the monitoring device 40 may select information to be displayed on the facepiece 70 of each team member by the team leader operating, for example, the team leader screen 90 via a GUI. The team leader may also operate the monitoring device 40 to select the team member to whom he wishes to show map information and position information. When the team leader performs this operation, the display control device 100 performs control so that the map information and position information are displayed on the facepiece 70 of the selected team member.

[0075] 10 is a diagram showing a configuration of a display control device 100 according to the first embodiment. The display control device 100 has, as components, a position calculation unit 110, a display control unit 120, a movement trajectory storage unit 132, a divided area generation unit 142, a search area determination unit 144, and an evacuation route generation unit 150. The position calculation unit 110 also has a detection information acquisition unit 112, a relative position acquisition unit 114, and an absolute position calculation unit 116. The display control unit 120 also has a monitoring display control unit 122 and a face display control unit 124.

[0076] The position calculation unit 110 corresponds to the position calculation unit 12 in FIG. 1. The position calculation unit 110 functions as a position calculation means. The display control unit 120 corresponds to the display control unit 14 in FIG. 1. The display control unit 120 functions as a display control means. The movement trajectory storage unit 132 functions as a movement trajectory storage means. The divided area generation unit 142 functions as a divided area generation means. The search area determination unit 144 functions as a search area determination means. The evacuation route generation unit 150 functions as an evacuation route generation means.

[0077] Furthermore, the detection information acquisition unit 112 functions as a detection information acquisition means. The relative position acquisition unit 114 functions as a relative position acquisition means. The absolute position calculation unit 116 functions as an absolute position calculation means. Furthermore, the monitoring display control unit 122 functions as a monitoring display control means. The face display control unit 124 functions as a face display control means.

[0078] Each of the above-mentioned components can be realized, for example, by executing a program under the control of the control unit 102. More specifically, each of the components can be realized by the control unit 102 executing a program stored in the storage unit 104. Each of the components may be realized by recording a necessary program in an arbitrary non-volatile recording medium and installing it as necessary. Each of the components may be realized not only by software based on a program, but also by a combination of hardware, firmware, and software. Each of the components may be realized by using an integrated circuit programmable by a user, such as a field-programmable gate array (FPGA) or a microcomputer. In this case, the integrated circuit may be used to realize a program composed of each of the above-mentioned components.

[0079] Fig. 11 is a flowchart showing a display method executed by the display system 20 according to the first embodiment. The flowchart shown in Fig. 11 is mainly executed by the display control device 100. As described above, distance measurement is performed between the multiple detection devices 60 (step S102). As a result, detection information including distance measurement result information is generated in each worker device 50.

[0080] The position calculation unit 110 calculates the position of each team member (worker) at the site (steps S104 to S108). Specifically, the position calculation unit 110 calculates the position of each of the team members (workers, task subjects) relative to the reference point (anchor point 30) based on the relative positions between the multiple detection devices 60 obtained using the distance measurement result information. This will be described in detail below together with the explanation of each component of the position calculation unit 110.

[0081] The detection information acquisition unit 112 acquires the detection information generated by the detection device 60 worn by each team member (worker) (step S104). Specifically, the detection information acquisition unit 112 receives (acquires) the detection information generated by the detection device 60 from the worker device 50 (control device 52 or detection device 60) worn by each team member. This allows the detection information related to the detection device 60 worn by each team member (hereinafter, sometimes simply referred to as "detection information related to each team member"). The detection information acquisition unit 112 controls the communication unit 106 of the information processing device 101 (FIG. 4) mounted on the display control device 100 to acquire the detection information. As described above, the detection information includes distance measurement result information, IMU information, and air pressure information.

[0082] The relative position acquisition unit 114 acquires the relative positions between the multiple detection devices 60 (step S106). Specifically, the relative position acquisition unit 114 acquires the relative positions between the multiple detection devices 60 using distance measurement result information generated by the detection device 60 worn by each team member. In other words, the relative position acquisition unit 114 acquires (calculates) the relative positions between the multiple detection devices 60, that is, the relative positions between the multiple team members, using distance measurement result information included in the detection information acquired by the detection information acquisition unit 112.

[0083] More specifically, the relative position acquisition unit 114 may detect the direction of the nearby member relative to the member from the direction of UWB radio waves from the member's UWB module 62 to the nearby member's UWB module 62 and IMU information from the member's inertial measurement unit 64. That is, the relative position acquisition unit 114 acquires the direction in which the member is facing from the IMU information. The relative position acquisition unit 114 can then detect the direction of the nearby member's UWB module 62 (detection device 60) as seen from the member's UWB module 62 (detection device 60) from the direction in which the member is facing and the attitude of the UWB module 62 relative to the member. The relative position acquisition unit 114 can then acquire (calculate) the relative position of the nearby member (detection device 60) relative to the member (detection device 60) from the detected direction and the distance from the member's detection device 60 to the nearby member's detection device 60. The attitude of the UWB module 62 with respect to the soldier can be determined in advance depending on the attitude in which the UWB module 62 (detection device 60) is worn by the soldier.

[0084] For example, assume that a member B (detection device 60B) is present near member A (detection device 60A). In this case, the relative position acquisition unit 114 detects the direction of member B (detection device 60B) relative to member A (detection device 60A) from the direction of the UWB radio wave from member A's UWB module 62 to member B's UWB module 62 and from member A's IMU information. As a result, the relative position acquisition unit 114 acquires the relative position of member B (detection device 60B) relative to member A (detection device 60A) from the detected direction and the distance from member A (detection device 60A) to member B (detection device 60).

[0085] In addition, when three or more team members are present in the vicinity of a certain team member, the relative position acquisition unit 114 may acquire the relative position between the team member (detection device 60) and the nearby team members (detection devices 60) for that team member by using triangulation technology. That is, in this case, the distance from three or more detection devices 60 is measured for the detection device 60 of that team member. Therefore, the relative position acquisition unit 114 can acquire (calculate) the relative position between the team member (detection device 60) and the nearby team members (detection devices 60) by the principle of triangulation even if it does not detect the direction of the nearby team members relative to that team member. For example, it is assumed that team member A (detection device 60A), team member C (detection device 60C), and team member D (detection device 60D) are present in the vicinity of team member B (detection device 60B). In this case, the relative position acquisition unit 114 may acquire the relative positions of team member B (detection device 60B) and team member A (detection device 60A), team member C (detection device 60C), and team member D (detection device 60D) using the principle of triangulation.

[0086] Also, assume that there are two team members in the vicinity of a certain team member. In this case, the relative position acquisition unit 114 may acquire the relative position of the team member (detection device 60) and the nearby team members (detection devices 60) by combining the principle of triangulation with the direction of the nearby team members relative to the team member. That is, in this case, the distance from the two detection devices 60 of the team member is only measured, so the relative position of the team member to the two nearby team members is not uniquely determined by the principle of triangulation alone. That is, it is not determined on which side of the line connecting the two nearby team members the team member is located. In this case, the relative position acquisition unit 114 may acquire the relative position of the team member to the two nearby team members by detecting the approximate direction of each of the two nearby team members relative to the team member using the above-mentioned method, using the principle of triangulation.

[0087] For example, assume that team member B (detection device 60B) and team member D (detection device 60D) are present in the vicinity of team member C (detection device 60C). In this case, the relative position acquisition unit 114 detects the directions of team member B (detection device 60B) and team member D (detection device 60D) relative to team member C (detection device 60C). Then, the relative position acquisition unit 114 may use these directions and the principle of triangulation to acquire the relative positions of team member C (detection device 60C) and team member B (detection device 60B) and team member D (detection device 60D).

[0088] The absolute position calculation unit 116 calculates the absolute position of each team member (worker) (step S108). Specifically, the absolute position calculation unit 116 calculates the position of each team member (worker) relative to the reference point (anchor point 30) as the absolute position. More specifically, the absolute position calculation unit 116 calculates the absolute position of the team member (detection device 60) whose relative position relative to the anchor point 30 has been acquired. That is, for this team member, the absolute position calculation unit 116 calculates the relative position relative to the anchor point 30 as the absolute position of that team member. For example, it is assumed that team member A is present near the anchor point 30, and therefore the relative position of team member A (detection device 60A) relative to the anchor point 30 has been acquired. In this case, the absolute position calculation unit 116 calculates the relative position of team member A (detection device 60A) relative to the anchor point 30 as the absolute position of team member A.

[0089] Then, the absolute position calculation unit 116 calculates the absolute position of the team member (detection device 60) whose relative position with the team member (detection device 60) whose absolute position has been calculated, by a geometric method. For example, in the above example, the relative position between team member A (detection device 60A) and team member B is acquired. In this case, the absolute position calculation unit 116 calculates the absolute position of team member B by a geometric method from the absolute position of team member A and the relative position of team member B with respect to team member A. For example, in a two-dimensional coordinate system, the absolute position of team member A is (Xa, Ya), and the relative position vector of team member B with respect to team member A is (Xab, Yab). In this case, the absolute position calculation unit 116 may calculate the absolute position (Xb, Yb) of team member B by Xb=Xa+Xab and Yb=Ya+Yab. The absolute position calculation unit 116 calculates the absolute positions of the other team members in the same manner. When there are a large number of team members, the absolute position calculation section 116 may calculate the absolute position of each team member using a multivariate analysis method such as MDS (Multi Dimensional Scaling).

[0090] The position calculation unit 110 may use the atmospheric pressure information to identify the floor level of the location where the team member is located. That is, the position calculation unit 110 identifies (estimates) the floor level of the team member (worker, task force) at the site based on the atmospheric pressure information detected by each of the multiple detection devices 60. The atmospheric pressure is highest at the ground level, and decreases as the air gets thinner in the upper atmosphere. The position calculation unit 110 measures the altitude by capturing the change in atmospheric pressure using the atmospheric pressure information. Specifically, the position calculation unit 110 determines that the atmospheric pressure detected before the team member enters the building at the site is the atmospheric pressure (reference atmospheric pressure) of the first floor (ground level) that serves as a reference. Then, when the atmospheric pressure indicated in the atmospheric pressure information related to a certain team member is lower than the reference atmospheric pressure by a predetermined value, the position calculation unit 110 determines that the floor level of the team member has risen (for example, the team member has risen to the second floor).

[0091] The movement trajectory storage unit 132 stores the movement trajectory of each team member (worker) (step S110). Specifically, the movement trajectory storage unit 132 stores movement trajectory data in which the absolute position of each team member is associated with the time at that time. The movement trajectory data is used to plot the absolute position of each team member, thereby generating a movement trajectory. The movement trajectory storage unit 132 can be realized by the memory unit 104 of the information processing device 101 mounted on the display control device 100.

[0092] The divided area generating unit 142 generates divided areas by dividing the work site of the team members into a plurality of areas (step S112). Specifically, the divided area generating unit 142 generates a plurality of areas (divided areas) divided into a mesh shape corresponding to the location of the site. The divided areas may be, for example, rectangular of several meters by several meters. Furthermore, the shape of the divided areas is not limited to rectangular, and may be, for example, a hexagon. The divided areas will be described later.

[0093] The display control unit 120 performs control so that position information indicating the position of the team member (worker) is displayed on the display device (step S120). As a result, the position information of the team member (worker) is displayed on the display device (monitoring device 40 and face piece 70). That is, under the control of the display control unit 120, a position information display screen displaying the position information of the team member is displayed on the display device. At this time, the display control unit 120 performs control so that multiple divided areas are displayed and the positions of the team members (workers, main operators of work) are superimposed on the displayed divided areas.

[0094] The monitoring display control unit 122 performs control so that information about each team member is displayed on the monitoring device 40. As a result, a team leader screen 90 showing information about each team member is displayed on the monitoring device 40, as exemplified in FIG.

[0095] The monitoring display control unit 122 also performs control so that the position information of each team member is displayed on the monitoring device 40. Specifically, the monitoring display control unit 122 transmits a command to the monitoring device 40 to cause the monitoring device 40 to display the position information of each team member and the divided area. As a result, the interface unit 108 of the information processing device 101 mounted on the monitoring device 40 displays the position information of the team members. This allows the team leader to easily grasp the position of each team member. At this time, the interface unit 108 of the monitoring device 40 also displays the position information of the team members so that the positions of the team members are superimposed on the mesh-shaped divided areas. At this time, the monitoring device 40 also performs control so that the position information is displayed in correspondence with the positions of the team members and the positions of the divided areas.

[0096] The facepiece display control unit 124 controls so that information about each team member is displayed on the facepiece 70 worn by the corresponding team member. As a result, a team member screen 80 showing information about the corresponding team member is displayed on the facepiece 70 worn by that team member, as shown in FIG.

[0097] The facepiece display control unit 124 also performs control so that the position information and divided areas of the team members are displayed on the facepiece 70 worn by each team member. Specifically, the facepiece display control unit 124 transmits a command to the control device 52 of the worker device 50 to display the position information and divided areas of the team members on the facepiece 70. As a result, the control device 52 generates a screen that displays the position information of the team members. Then, the control device 52 controls the head-up display 74, so that the head-up display 74 of the facepiece 70 worn by the team members displays the position information of the team members. This makes it possible for the team members to easily grasp the position of each team member.

[0098] The control device 52 also performs control so that position information is displayed by corresponding the position of the team member to the position of the divided area. As a result, the control device 52 generates a screen in which the position of the team member is superimposed on the mesh-shaped divided area. Then, the control device 52 controls the head-up display 74, so that the head-up display 74 of the facepiece 70 worn by the team member displays the position information of the team member so that the position of the team member is superimposed on the mesh-shaped divided area.

[0099] Furthermore, when displaying the position information of each team member on the face piece 70 worn by the team member, the face piece display control unit 124 may perform control so that the display form is such that the position of the team member wearing that face piece 70 stands out more. In other words, the face piece display control unit 124 performs control so that the position of the team member (worker) wearing that face piece 70 is displayed in a display form that stands out more than the positions of team members (workers, main workers) other than that team member. For example, the face piece display control unit 124 performs control so that the position of team member A is displayed on the face piece 70 of team member A in a display form that stands out more than the positions of team members B to D.

[0100] For example, the facepiece display control unit 124 may perform control so that a specific marker is added only to the position information of the corresponding team member. Alternatively, the facepiece display control unit 124 may perform control so that the position information of the corresponding team member is displayed more clearly (brighter) than the position information of the other team members. Alternatively, the facepiece display control unit 124 may perform control so that an image (icon) indicating the position information of the corresponding team member is displayed larger than the images (icons) indicating the position information of the other team members. Alternatively, the facepiece display control unit 124 may perform control so that the color of the image (icon) indicating the position information of the corresponding team member is more noticeable than the color of the image (icon) indicating the position information of the other team members. For example, the image (icon) indicating the position information of the corresponding team member may be displayed in red, and the images (icons) indicating the position information of the other team members may be displayed in black.

[0101] This allows the team member to easily ascertain which of the position information of multiple team members displayed on the face piece 70 is his / her own position information. This makes it even easier for the team member to ascertain his / her own position.

[0102] Here, the team leader (commander) may operate the monitoring device 40 to determine which team member's facepiece 70 will have its position information displayed. Specifically, for example, when an operation is performed on the monitoring device 40 to display position information on the facepiece 70 of team member A, the monitoring device 40 transmits a command to the display control device 100 to display the position information on the facepiece 70 of team member A. At this time, the facepiece display control unit 124 of the display control device 100 transmits a command to the control device 52A of the worker device 50A of team member A to display the team member's position information (and the divided area) on the facepiece 70A. As a result, the head-up display 74 of the facepiece 70A worn by team member A displays the team member's position information. At this time, the facepieces 70 of team members other than team member A do not need to display the team member's position information.

[0103] Here, the display control unit 120 may perform control so that the monitoring device 40 displays display content different from the display content displayed on the face piece 70. Specifically, the monitoring display control unit 122 transmits to the monitoring device 40 a command to cause the monitoring device 40 to display a screen different from the screen displayed on the face piece 70. As a result, a screen different from the screen displayed on the face piece 70 is displayed on the monitoring device 40, as illustrated in Figs. 8 and 9.

[0104] The search area determination unit 144 determines whether or not any of the multiple divided areas has been searched by a team member (step S130). If it is determined that any divided area has been searched by a team member (YES in S130), the display control unit 120 performs control so that the display of the searched divided area (searched area) is changed (step S132). In other words, the display control unit 120 performs control so that the display form of the divided area determined to have been searched by a team member (worker, work subject) is different from the display form of the divided area not determined to have been searched by a team member (worker, work subject). On the other hand, if it is determined that no divided area has been searched by a team member (NO in S130), the process of S132 is not executed.

[0105] Specifically, the search area determination unit 144 may determine that a divided area is a searched area when, for example, one or more team members arrive in a divided area and then leave the divided area. The search area determination unit 144 may also determine a searched area using the movement trajectory stored in the movement trajectory storage unit 132. Note that the method of determining whether a divided area has been searched is not limited to the above example, and may be determined as appropriate depending on the situation at the site, etc.

[0106] Furthermore, the search area determination unit 144 may determine the searched area by the captain operating the monitoring device 40. That is, the captain may visually check the position information of the team members displayed on the monitoring device 40 to determine the searched area. Then, the captain may operate the monitoring device 40 using a GUI to specify the searched area. For example, the captain may specify the searched area by selecting the searched area through an operation such as tapping or clicking using the GUI in the interface unit 108 of the monitoring device 40. Then, the monitoring device 40 may transmit information indicating the searched area to the display control device 100. Using this information, the search area determination unit 144 may determine the searched area.

[0107] Also, for example, the display control unit 120 performs control so that the display of the searched area is darker than the display of the divided areas other than the searched area. For example, the display control unit 120 may perform control so that the searched area is displayed as if it is filled in.

[0108] Then, the monitoring display control unit 122 transmits a command to change the display of the searched area to the monitoring device 40. As a result, the interface unit 108 of the information processing device 101 mounted on the monitoring device 40 displays a screen in which the display of the searched area has been changed.

[0109] Similarly, the face piece display control unit 124 transmits a command to change the display of the searched area to the control device 52 of the worker device 50. As a result, the control device 52 generates a screen on which the display of the searched area has been changed. Then, the control device 52 controls the head-up display 74, so that the head-up display 74 displays the screen on which the display of the searched area has been changed.

[0110] In this way, by changing the display of the searched area, the team leader and team members can easily grasp the searched area. This allows team members to proceed with their search activities, focusing on the divided areas other than the searched area. Also, the team leader can instruct team members on where to search in the field while looking at the screen of the monitoring device 40.

[0111] The evacuation route generating unit 150 determines whether an evacuation order has been issued to the team members (step S140). Here, the evacuation order is an order instructing the team members to evacuate from the scene. The evacuation order may be issued, for example, by the team leader operating the monitoring device 40 in an emergency. In this case, the monitoring device 40 may transmit information indicating that an evacuation order has been issued to the display control device 100. Using this information, the evacuation route generating unit 150 may determine that an evacuation order has been issued.

[0112] When an evacuation command is issued (YES in S140), the evacuation route generating unit 150 generates an evacuation route for each team member when they evacuate from the site (step S142). Furthermore, the display control unit 120 (facepiece display control unit 124) performs control so that the evacuation route of each team member is displayed on the facepiece 70 of that team member (step S144). The display control unit 120 (facepiece display control unit 124) may also perform control so that the evacuation routes of other team members are displayed on the facepiece 70 of each team member. In other words, the display control unit 120 performs control so that the facepiece 70 displays the evacuation route when at least the team member (worker) wearing this facepiece 70 evacuates from the site. On the other hand, when an evacuation command has not been issued (NO in S140), the processes of S142 and S144 are not executed.

[0113] The evacuation route generating unit 150 may generate an evacuation route for a team member (worker) based on the movement trajectory of the team member. Specifically, the evacuation route generating unit 150 may generate an evacuation route by reversing the movement trajectory of the team member. In this case, if the team member does not move along the shortest route on the movement trajectory, the evacuation route generating unit 150 may generate an evacuation route that is the shortest route along the movement trajectory. This allows the evacuation route to be generated automatically, making it unnecessary to consider an evacuation route in an emergency. The face display control unit 124 performs control so that the generated evacuation route is displayed on the face 70.

[0114] The evacuation route generating unit 150 may generate an evacuation route for the team members (workers) in response to an operation of the team leader (commander). Specifically, the team leader operates the monitoring device 40 to generate an evacuation route. For example, the evacuation route may be generated by handwriting the evacuation route on the position information and map information displayed on the touch panel of the monitoring device 40, which is a tablet terminal. The monitoring device 40 transmits information indicating the generated evacuation route to the display control device 100. The evacuation route generating unit 150 may generate an evacuation route using this information. This makes it possible to manually generate an evacuation route, for example, even if the evacuation route automatically generated as described above becomes impassable due to the collapse of a building or the like. The face display control unit 124 performs control so that the generated evacuation route is displayed on the face 70.

[0115] The evacuation route generating unit 150 may also generate a display of the direction in which the team member should proceed. The display control unit 120 (facepiece display control unit 124) controls the facepiece 70 to display the direction in which the team member (worker) wearing the facepiece 70 should proceed, thereby displaying the evacuation route. Specifically, the evacuation route generating unit 150 generates an evacuation route by the above-mentioned automatic or manual method. The evacuation route generating unit 150 may also generate a message indicating which direction the team member should proceed along the evacuation route. For example, the evacuation route generating unit 150 may generate a message such as "Go north," "Go forward," or "Go right." The facepiece display control unit 124 controls the message indicating the generated evacuation route to be displayed on the facepiece 70 (message display area 84 of the team member screen 80). The evacuation route generating unit 150 may also generate an arrow indicating which direction the team member should proceed along the evacuation route.

[0116] <Example> Here, specific examples of the position information displayed on the face piece 70 and the monitoring device 40 will be described. FIG. 12 is a diagram illustrating a scene 900 where team members are present. FIG. 12 shows an example in which team members A to D are located at the scene 900, which is a building. The scene 900 is a fire scene. The upward direction in FIG. 12 is north. An anchor point 30 is located near an entrance 902 of the scene 900. The anchor point 30 is not permanently installed at the scene 900, but is installed by the team member when the team member enters the scene 900. As described above, the position of this anchor point 30 becomes a reference point (the origin of the coordinate system) of the absolute position of the team member. The anchor point 30 is connected to the display control device 100 so as to be able to communicate with each other.

[0117] Team member A wearing worker equipment 50A (detection device 60A) is located on the passage 904, approximately near the west side of anchor point 30. Team member B wearing worker equipment 50B (detection device 60B) is located on the passage 904, approximately near the west side of team member A. Team member C wearing worker equipment 50C (detection device 60C) is located on the passage 904, approximately near the south side of team member B. Team member D wearing worker equipment 50D (detection device 60D) is located in room 906. Team member D is located near team members B and C. A fire source 910 is located in room 908 near team member B.

[0118] In this case, as described above with reference to FIG. 6, the distance between anchor point 30 and detection device 60A is measured. Also, the distance between detection device 60A and detection device 60B is measured. Also, the distance between detection device 60B and detection device 60C is measured. Also, the distance between detection device 60B and detection device 60D is measured. Also, the distance between detection device 60C and detection device 60D is measured.

[0119] The detection device 60A (control device 52A) transmits detection information Dt_A to the display control device 100. Moreover, the detection device 60B (control device 52B) transmits detection information Dt_B to the display control device 100. Moreover, the detection device 60C (control device 52C) transmits detection information Dt_C to the display control device 100. Moreover, the detection device 60D (control device 52D) transmits detection information Dt_D to the display control device 100. Then, as described above, the position calculation unit 110 of the display control device 100 uses the detection information acquired from each detection device 60 to calculate the absolute positions of the team members A to D, that is, the positions relative to the anchor point 30 (reference point).

[0120] 13 is a diagram illustrating a position information display screen 200 displayed under the control of the display control device 100 according to the first embodiment. As described above, the position information display screen 200 is displayed on the face plate 70 and the monitoring device 40 under the control of the display control unit 120.

[0121] The position information display screen 200 may be displayed in place of a captured image in the captured image display area 81 on the team member screen 80 ( FIG. 8 ) displayed on the facepiece 70. Alternatively, the position information display screen 200 may be displayed on the entirety of the team member screen 80 displayed on the facepiece 70. How the position information display screen 200 is displayed on the team member screen 80 may be switched by each team member operating the operation switch 78 of the facepiece 70 they wear. Alternatively, how the position information display screen 200 is displayed on the team member screen 80 displayed on each team member's facepiece 70 may be switched by the team leader operating the monitoring device 40.

[0122] The position information display screen 200 may be displayed in a map display area 91 on a leader screen 90 ( FIG. 9 ) displayed on the monitoring device 40. Alternatively, the position information display screen 200 may be displayed in an activity status display area 93 on the leader screen 90, instead of the activity status image 94 of each member. Alternatively, the position information display screen 200 may be displayed over the entirety of the leader screen 90 displayed on the monitoring device 40. The leader may be able to operate the monitoring device 40 to switch how the position information display screen 200 is displayed on the leader screen 90.

[0123] The position information display screen 200 displays map information 210 corresponding to a floor map of the scene 900. The position information display screen 200 may also display an orientation mark 202 indicating a north direction in the map information 210. If the position of a fire origin 910 in the scene 900 is known, the position information display screen 200 may display a fire origin mark 204 at a corresponding location in the map information 210. The orientation mark 202 and the fire origin mark 204 may be displayed under the control of the display control unit 120. The fire origin mark 204 may be displayed by the captain operating the monitoring device 40 to specify the location of the fire origin 910. Specifically, the monitoring device 40 transmits location information of the specified fire origin 910 to the display control device 100. Then, the display control unit 120 performs control so that the fire origin mark 204 is displayed at a location in the map information 210 corresponding to the location of the fire origin 910.

[0124] Then, the position information display screen 200 displays an image of the anchor point 30 and images (icons) of the members A to D so as to be superimposed on the map information 210. Specifically, the position information display screen 200 displays an anchor point image 212 at a location on the map information 210 corresponding to the location of the anchor point 30. Furthermore, the position information display screen 200 displays a member image 220A of the member A at a location on the map information 210 corresponding to the location of the member A. Furthermore, the position information display screen 200 displays a member image 220B of the member B at a location on the map information 210 corresponding to the location of the member B. Furthermore, the position information display screen 200 displays a member image 220C of the member C at a location on the map information 210 corresponding to the location of the member C. Furthermore, the position information display screen 200 displays a member image 220D of the member D at a location on the map information 210 corresponding to the location of the member D. Here, the team member image 220 of each team member indicates the position information of each team member. In addition, identification information (such as name) of the corresponding team member may be displayed near each team member image 220. When the team leader selects a team member image 220 on the position information display screen 200 by, for example, a tap operation or a click operation, an image captured by the imaging device 72 provided on the facepiece 70 of the team member corresponding to the selected team member image 220 may be displayed. Alternatively, an image captured by the imaging device 72 provided on the facepiece 70 of each team member corresponding to each team member image 220 may be displayed near each team member image 220 or superimposed on each team member image 220.

[0125] 13 is displayed on the faceplate 70 under the control of the display control device 100 (display control unit 120), allowing each team member (worker) to easily grasp the position of each team member (worker, task subject). Also, the position information display screen 200 as exemplified in Fig. 13 is displayed on the monitoring device 40 under the control of the display control device 100 (display control unit 120), allowing the team leader (commander) to easily grasp the position of each team member (worker, task subject).

[0126] Fig. 14 is a diagram illustrating a state in which the divided area 230 is displayed on the position information display screen 200 illustrated in Fig. 13. In the example of Fig. 14, the position information display screen 200 displays nine divided areas 230-1 to 230-9. In addition, on the position information display screen 200, team member images 220 indicating the position information of each team member are displayed superimposed on the divided areas 230.

[0127] In addition, in the example of Fig. 14, the divided areas 230-1, 230-2, 230-3, 230-6, and 230-9 are searched areas. Therefore, the display form of the searched areas 230-1, 230-2, 230-3, 230-6, and 230-9 is different from the display form of the unsearched divided areas 230-4, 230-5, 230-7, and 230-8. In the example of Fig. 14, the searched areas 230-1, 230-2, 230-3, 230-6, and 230-9 are displayed in a dark display form, as if they are filled in.

[0128] A position information display screen 200 as exemplified in Fig. 14 is displayed on the face piece 70 under the control of the display control device 100 (display control unit 120), allowing each team member (worker) to easily grasp the searched areas. Also, a position information display screen 200 as exemplified in Fig. 14 is displayed on the monitoring device 40 under the control of the display control device 100 (display control unit 120), allowing the team leader (commander) to easily grasp the searched areas. Also, this allows the team leader to instruct each team member by voice using a radio or the like as to the places they should search, while viewing the position information of each team member.

[0129] FIG. 15 is a diagram illustrating a state in which the position information display screen 200 illustrated in FIG. 13 is displayed on the team member screen 80. FIG. 15 illustrates the team member screen 80 displayed on the facepiece 70D of team member D. In the example of FIG. 15, the position information display screen 200 is displayed at the position of the captured image display area 81 of the team member screen 80 illustrated in FIG. 8. This allows team member D to easily grasp his / her own position and the positions of the other team members. In addition, by displaying a similar position information display screen 200 on the facepiece 70 of the other team member, the other team members can also easily grasp their own position and the positions of the other team members. The worker device 50 (control device 52 or facepiece 70) may obtain an image captured by the imaging device 72 provided on the facepiece 70 of the other team member from the display control device 100. In this case, when a team member selects a team member image 220 on the position information display screen 200 by voice or the like, an image captured by the imaging device 72 provided on the facepiece 70 of the team member corresponding to the selected team member image 220 may be displayed. In this case, the control device 52 may perform voice recognition processing on the team member's voice to select the team member image 220. For example, when team member D utters "team member A," the control device 52 performs voice recognition from the voice signal input by the microphone 76a to select the team member image 220A, and displays the image captured by the imaging device 72 of team member A near the team member image 220A or the like. Alternatively, an image captured by the imaging device 72 provided on the facepiece 70 of each team member corresponding to each team member image 220 may be displayed near each team member image 220 or superimposed on each team member image 220.

[0130] In addition, in the position information display screen 200 illustrated in FIG. 15, a marker 222 indicating the member's own position is added to the member image 220D of member D. This allows member D to easily know which of the multiple member images 220 corresponds to him / her. Therefore, member D can easily know his / her own position. In addition, by displaying a similar position information display screen 200 on the face mask 70 of the other member, the other member can also easily know his / her own position.

[0131] At this time, the display control unit 120 (facepiece display control unit 124) performs control so that a marker 222 is added to the member image 220D of member D when displaying the position information display screen 200 on the facepiece 70D worn by member D. Then, the facepiece display control unit 124 transmits a command to the control device 52D of the worker device 50D to add the marker 222 to the member image 220 of member D. As a result, the control device 52D generates the position information display screen 200 in which the marker 222 is added to the position information (member image 220D) of member D.

[0132] 15, the marker 222 is circular, but the shape of the marker 222 may be any shape. Also, it is not limited to adding a marker to the member image 220D of member D. As described above, any display form is possible that makes the member image 220D of member D more noticeable than the other member images 220.

[0133] FIG. 16 is a diagram illustrating a state in which the map information 210 is not displayed on the position information display screen 200 illustrated in FIG. 14. In the example of FIG. 16, the position information display screen 200 displays the anchor point image 212, team member images 220A to 220D of each team member, the orientation mark 202, and divided areas 230-1 to 230-9. At this time, the anchor point image 212 and the multiple team member images 220 are arranged in the divided area 230 divided in a mesh shape. As described above, the anchor point 30 is installed near the entrance 902 of the site 900. Therefore, each team member and the team leader can grasp where each team member is located in relation to the entrance 902 at the site 900 even without map information.

[0134] FIG. 17 is a diagram illustrating a state in which an evacuation route is displayed on the position information display screen 200 illustrated in FIG. 13. As illustrated in FIG. 17, the evacuation route 240 generated by the evacuation route generating unit 150 is displayed on the position information display screen 200 under the control of the display control unit 120. In the example of FIG. 17, the evacuation route 240 of the team member D is displayed. The display control unit 120 may perform control so that the position information display screen 200 illustrated in FIG. 17 is displayed at least on the face mask 70 of the team member D. In addition, the display control unit 120 may perform control so that the position information display screen 200 illustrated in FIG. 17 is displayed on the monitoring device 40.

[0135] This allows each team member to easily grasp the evacuation route during emergency evacuation. Then, during emergency evacuation, each team member may move according to the evacuation route. In particular, during emergency evacuation, team members may panic and lose track of their own position and the direction they should go. In this embodiment, such team members can be supported. As described above, the evacuation route may be displayed as a message indicating the direction in which the team member should go. For example, the display control unit 120 (facepiece display control unit 124) may perform control so that messages such as "Go north," "Move forward," "Go right," or "Go straight for about 10 m and turn right" are displayed in the message display area 84 of the team member screen 80. Alternatively, the display control unit 120 (facepiece display control unit 124) may perform control so that a figure (e.g., an arrow, etc.) indicating the direction in which the team member should go is displayed on the team member screen 80. The figure indicating the direction in which the team member should go may be displayed by being superimposed on the position information display screen 200, for example.

[0136] Even if the team member screen 80 is no longer displayed on the facepiece 70 due to some kind of trouble, the team leader may give instructions to the team members by voice over a radio or the like while looking at the position information display screen 200 as shown in Fig. 17 displayed on the monitoring device 40. Alternatively, in this case, the control device 52 may automatically generate audio information corresponding to the evacuation route. The speaker 76b of the facepiece 70 may then output the audio information.

[0137] (Modification) The present invention is not limited to the above-described embodiment, and can be modified as appropriate without departing from the spirit of the present invention. For example, the order of the processes in the flowchart shown in FIG. 11 can be modified as appropriate. Also, one or more of the processes in the flowchart shown in FIG. 11 may be omitted. For example, in the flowchart shown in FIG. 11, the processes of S112 and S130 to S144 may be omitted. Also, in the flowchart shown in FIG. 11, the order of the processes of S130 to S132 and the processes of S140 to S144 may be reversed.

[0138] In addition, in the first embodiment, it is described that a team member (worker) performs the work at the site, but a moving body other than a worker may perform the work. For example, a moving body such as a robot, an unmanned work vehicle, or a drone may perform the work at the site. In this case, the moving body is the main body of the work. Note that the detection device 60 may be attached (installed) to the moving body, but the face piece 70 does not have to be attached.

[0139] In the above-described embodiment, the face piece 70 displays the team member screen 80 (position information, etc.) using the head-up display 74, but this is not limited to a configuration. The face piece 70 does not have to display information using the head-up display 74. For example, information may be displayed on a screen such as an LCD screen provided on the face piece 70. However, by displaying the team member screen 80 as a virtual image using the head-up display 74, the team member only needs to minimize the movement of his or her line of sight when viewing the team member screen 80.

[0140] In the above-described embodiment, the display control device 100 (position calculation unit 110) calculates the relative position of each team member, but the present invention is not limited to this configuration. The worker device 50 (e.g., the control device 52) may calculate the relative position. In this case, the relative position acquisition unit acquires (receives) relative position information from the worker device 50 (control device 52).

[0141] In the above embodiment, radio waves are directly transmitted and received between a plurality of detection devices (UWB modules), but the present invention is not limited to such a configuration. In cases where the distance between members of the team may be so great that UWB radio waves cannot reach each other, the members of the team may install a relay device at the site. Here, this relay device has a UWB module. This allows each detection device to transmit and receive radio waves to and from the other detection devices via the relay device.

[0142] In the above examples, the program includes instructions (or software code) that, when loaded into a computer, cause the computer to perform one or more functions described in the embodiments. The program may be stored in a non-transitory computer-readable medium or a tangible storage medium. By way of example and not limitation, the computer-readable medium or tangible storage medium includes random-access memory (RAM), read-only memory (ROM), flash memory, solid-state drive (SSD) or other memory technology, CD-ROM, digital versatile disk (DVD), Blu-ray® disk or other optical disk storage, magnetic cassette, magnetic tape, magnetic disk storage or other magnetic storage device. The program may be transmitted on a transitory computer-readable medium or communication medium. By way of example and not limitation, the transitory computer-readable medium or communication medium includes electrical, optical, acoustic, or other forms of propagated signals.

[0143] Although the present invention has been described above with reference to the embodiment, the present invention is not limited to the above. Various modifications that can be understood by those skilled in the art can be made to the configuration and details of the present invention within the scope of the invention.

[0144] A part or all of the above-described embodiments can be described as, but is not limited to, the following supplementary notes. (Appendix 1) a position calculation means for calculating a position of each of the plurality of work subjects relative to a reference point using distance measurement result information indicating a result of distance measurement performed by transmitting and receiving radio waves between a plurality of detection devices attached to each of the plurality of work subjects performing work at the site; A display control means for controlling a facepiece worn by a worker who is the subject of the work to display one or more pieces of position information indicating the positions of the subject of the work; A display control device having the following. (Appendix 2) The display control means performs control so that the position of the worker wearing the facepiece is displayed in a display form that is more noticeable than the positions of the work subjects other than the worker. 2. A display control device as described in appendix 1. (Appendix 3) The display control means controls the facepiece to display at least an evacuation route when the worker wearing the facepiece evacuates from the work site. 3. A display control device according to claim 1 or 2. (Appendix 4) The display control means performs control so that the evacuation route generated based on a movement trajectory of the worker is displayed on the face piece. 4. A display control device according to claim 3. (Appendix 5) The display control means performs control so that the evacuation route generated in response to an operation of a commander who commands the scene is displayed on the facepiece. 4. A display control device according to claim 3. (Appendix 6) The display control means controls the facepiece to display a direction in which the worker wearing the facepiece should proceed, thereby displaying the evacuation route. 4. A display control device according to claim 3. (Appendix 7) The display control means performs control so that a plurality of areas divided into a mesh shape corresponding to the location of the work site are displayed on the faceplate, and the location of the work subject is superimposed on the displayed areas. 7. A display control device according to any one of claims 1 to 6. (Appendix 8) the display control means performs control so that a display form of the area determined to have been searched by the work subject is different from a display form of the area determined not to have been searched by the work subject. 8. A display control device according to claim 7. (Appendix 9) The display control means controls a monitoring device of a commander who commands the site to display the position of the work subject, The display control means controls the monitoring device to display a display content different from the display content displayed on the face piece. 9. A display control device according to any one of claims 1 to 8. (Appendix 10) The position calculation means identifies a floor level of the worker at the work site based on air pressure information indicating the air pressure detected by each of the plurality of detection devices. 10. A display control device according to any one of claims 1 to 9. (Appendix 11) A plurality of detection devices attached to a plurality of workers performing work at a site, respectively; A face piece to be worn by a worker who is the subject of the work; A display control device; having Each of the plurality of detection devices measures distances to the other detection devices by transmitting and receiving radio waves to and from the other detection devices; The display control device includes: a position calculation means for calculating a position of each of the plurality of work subjects relative to a reference point using distance measurement result information indicating a result of the distance measurement; A display control means for controlling a facepiece worn by a worker who is the subject of the work to display one or more pieces of position information indicating the positions of the subject of the work; having The face piece displays position information of the worker in response to control of the display control device. Display system. (Appendix 12) The display control means performs control so that the position of the worker wearing the facepiece is displayed in a display form that is more noticeable than the positions of the work subjects other than the worker. 12. The display system of claim 11. (Appendix 13) The display control means controls the facepiece to display at least an evacuation route when the worker wearing the facepiece evacuates from the work site. 13. The display system according to claim 11 or 12. (Appendix 14) The display control means performs control so that the evacuation route generated based on a movement trajectory of the worker is displayed on the face piece. 14. The display system of claim 13. (Appendix 15) The display control means performs control so that the evacuation route generated in response to an operation of a commander who commands the scene is displayed on the facepiece. 14. The display system of claim 13. (Appendix 16) The display control means controls the facepiece to display a direction in which the worker wearing the facepiece should proceed, thereby displaying the evacuation route. 14. The display system of claim 13. (Appendix 17) The display control means performs control so that a plurality of areas divided into a mesh shape corresponding to the location of the work site are displayed on the faceplate, and the location of the work subject is superimposed on the displayed areas. 17. A display system according to any one of claims 11 to 16. (Appendix 18) the display control means performs control so that a display form of the area determined to have been searched by the work subject is different from a display form of the area determined not to have been searched by the work subject. 18. The display system of claim 17. (Appendix 19) The display control means controls a monitoring device of a commander who commands the site to display the position of the work subject, The display control means controls the monitoring device to display a display content different from the display content displayed on the face piece. 19. A display system according to any one of claims 11 to 18. (Appendix 20) The position calculation means identifies a floor level of the worker at the work site based on air pressure information indicating the air pressure detected by each of the plurality of detection devices. 20. A display system according to any one of claims 11 to 19. (Appendix 21) The face piece is provided with a voice input / output device that inputs and outputs voice by bone conduction. 21. A display system according to any one of claims 11 to 20. (Appendix 22) The facepiece displays a virtual image in front of the worker wearing the facepiece, 22. A display system according to any one of claims 11 to 21. (Appendix 23) calculating a position of each of the plurality of workers relative to a reference point using distance measurement result information indicating a result of distance measurement performed by transmitting and receiving radio waves between a plurality of detection devices attached to each of a plurality of workers performing work at a site; and controlling a facepiece worn by the worker who is the work subject to display position information indicating one or more positions of the work subject. Display method. (Appendix 24) Control is performed so that the position of the worker wearing the facepiece is displayed in a display form that is more noticeable than the position of the work subject other than the worker. Display method as described in Appendix 23. (Appendix 25) Control is performed so that the facepiece displays an evacuation route when at least the worker wearing the facepiece evacuates from the work site. Display method as described in Appendix 23 or 24. (Appendix 26) and performing control so that the evacuation route generated based on the movement trajectory of the worker is displayed on the face piece. Display method as described in Appendix 25. (Appendix 27) and performing control so that the facepiece displays the evacuation route generated in response to an operation by a commander in command of the scene. Display method as described in Appendix 25. (Appendix 28) Control is performed so that the facepiece displays the direction in which the worker wearing the facepiece should proceed, thereby displaying the evacuation route. Display method as described in Appendix 25. (Appendix 29) Control is performed so that a plurality of areas divided into a mesh shape corresponding to the location of the work site are displayed on the face piece, and the location of the work subject is superimposed on the displayed areas. 29. The display method according to any one of appendix 23 to 28. (Appendix 30) performing control such that a display form of the area determined to have been searched by the work subject is different from a display form of the area determined not to have been searched by the work subject; Display method as described in Appendix 29. (Appendix 31) Controlling the monitoring device of the commander in command of the site to display the position of the work subject; Control is performed so that the monitoring device displays a display content different from the display content displayed on the face piece. 2. The display method according to any one of appendix 23 to 30. (Appendix 32) identifying a floor level of the worker at the work site based on air pressure information indicating the air pressure detected by each of the plurality of detection devices; 2. The display method according to any one of appendix 23 to 31. (Appendix 33) A step of calculating a position of each of the plurality of work subjects relative to a reference point using distance measurement result information indicating a result of distance measurement performed by transmitting and receiving radio waves between a plurality of detection devices attached to each of the plurality of work subjects performing work at a site; A step of controlling a facepiece worn by the worker who is the work subject to display position information indicating one or more positions of the work subject; A non-transitory computer-readable medium on which a program for causing a computer to execute the program is stored. [Explanation of symbols]

[0145] 1 Display System 2. Detection device Tetrahedron 6. Work Subject 10 Display control device 12 Position calculation section 14 Display control section 20 Display System 22 Network 30 Anchor Points 40 Monitoring equipment 50 Operator equipment 52 Control device 60 Detection Device 62 UWB Module 64 Inertial Measurement Unit 66 Barometric pressure sensor 70-sided 72 Imaging Device 74 Head-up display 76 Audio input / output device 76a Microphone 76b Speaker 78 Operation switch 80 Squad screen 81 Captured image display area 82 Entry elapsed time display area 83 Air cylinder pressure display area 84 Message display area 90 Captain Screen 91 Map display area 92 Message sending area 93 Activity Status Display Area 94 Activity Status Images 100 Display control device 101 Information processing device 110 Position calculation section 112 Detection information acquisition unit 114 Relative position acquisition unit 116 Absolute position calculation unit 120 Display control unit 122 Monitoring display control section 124 Face display control section 132 Movement trajectory storage unit 142 Division area generation unit 144 Search area determination unit 150 Evacuation route generation unit 200 Location information display screen 210 Map Information 212 Anchor Point Images 220 Team Member Images 222 Marker 230 Division Area 240 Evacuation Route

Claims

1. a position calculation means for calculating a position of each of the plurality of work subjects relative to a reference point using distance measurement result information indicating a result of distance measurement performed by transmitting and receiving radio waves between a plurality of detection devices attached to each of the plurality of work subjects performing work at the site; A display control means for controlling a facepiece worn by a worker who is the subject of the work to display one or more pieces of position information indicating the positions of the subject of the work; A display control device having the following.

2. The display control means performs control so that the position of the worker wearing the facepiece is displayed in a display form that is more noticeable than the positions of the work subjects other than the worker. The display control device according to claim 1 .

3. The display control means controls the facepiece to display at least an evacuation route when the worker wearing the facepiece evacuates from the work site. The display control device according to claim 1 or 2.

4. The display control means performs control so that the evacuation route generated based on a movement trajectory of the worker is displayed on the face piece. The display control device according to claim 3 .

5. The display control means performs control so that the evacuation route generated in response to an operation of a commander who commands the scene is displayed on the facepiece. The display control device according to claim 3 .

6. The display control means controls the facepiece to display a direction in which the worker wearing the facepiece should proceed, thereby displaying the evacuation route. The display control device according to claim 3 .

7. The display control means performs control so that a plurality of areas divided into a mesh shape corresponding to the location of the work site are displayed on the faceplate, and the location of the work subject is superimposed on the displayed areas. The display control device according to claim 1 .

8. the display control means performs control so that a display form of the area determined to have been searched by the work subject is different from a display form of the area determined not to have been searched by the work subject. The display control device according to claim 7.

9. calculating a position of each of the plurality of workers relative to a reference point using distance measurement result information indicating a result of distance measurement performed by transmitting and receiving radio waves between a plurality of detection devices attached to each of a plurality of workers performing work at a site; and performing control so that a facepiece worn by the worker who is the work subject is displayed with position information indicating one or more positions of the work subject. Display method.

10. A step of calculating a position of each of the plurality of work subjects relative to a reference point using distance measurement result information indicating a result of distance measurement performed by transmitting and receiving radio waves between a plurality of detection devices attached to each of the plurality of work subjects performing work at a site; A step of controlling a facepiece worn by the worker who is the work subject to display position information indicating one or more positions of the work subject; A program that causes a computer to execute the following.

Images