JP2024042984A - Worker management system and computer program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a worker management system and a computer program.

SOLUTION: A worker management system 100 for managing workers in a site comprises: a site information identification module 203 for receiving position information, acceleration information, and gyro information from a terminal device 120, and identifying a site where the terminal device 120 exists, on the basis of the information sent from the terminal device 120; a terminal information acquisition module 204 which acquires the information on the terminal device 120; a terminal position collation module 205 which searches a dangerous position which exists in a travel direction from a current position or a simulated position of the terminal device 120, and the travel direction; a risk determination module 206 which searches a risk in the dangerous position which exists in the travel direction of the terminal device 120; and a risk notification module 207 which transmits the risk to the terminal device 120.

SELECTED DRAWING: Figure 2

COPYRIGHT: (C)2024,JPO&INPIT

Description

The present invention relates to a system and a computer program for managing workers working on site.

BACKGROUND ART At work sites such as civil engineering, construction, or building repair, site structures and installations are arranged, and work at heights and other work is performed. Managers create work manuals and other documents from the viewpoint of worker safety management, and take care to prevent workers from unexpected accidents.

Despite the efforts of workers and managers, various accidents occur at various workplaces. For example, in the International Publication WO 2019/159267 pamphlet (Patent Document 1), on the premise that accidents occur according to Heinrich's law, caution points are identified on a map of the target area using incidents that did not result in accidents. Create caution location map information that displays a mark indicating the location.

Furthermore, in JP-A-2013-080304 (Patent Document 2), in order to prevent the occurrence of industrial accidents, a danger prediction management server is provided, and the work contents including the work place, the points of the danger, and the Using danger prediction information that associates the degree of danger with its countermeasures, if the worker does not press the near-miss button and input near-miss information, a warning is sent to the worker's mobile terminal in order to educate the worker. Describes techniques for transmitting information.

There are various known techniques for managing worksites using near-miss cases, but recent advances in IoT technology have made it possible to collect information such as the location, acceleration, and gyro information of workers from mobile devices such as smartphones carried by workers. In addition, we now have an environment in which infrastructure such as artificial intelligence (AI) and machine learning can be easily used, and it is believed that using this information to manage the movements of workers will enable more detailed work management and safety management.

International publication WO2019/159267 pamphlet Japanese Patent Application Publication No. 2013-080304

The present invention has been made in view of the above-mentioned conventional technology, and uses position information, acceleration information, gyro information, etc. from a mobile terminal owned by the worker to determine the position of the worker at the site for the purpose of predicting danger. The purpose of the present invention is to provide a worker management system and a computer program that can be used to check the current status of workers at the site, that is, to manage their dynamics.

According to one embodiment of the present invention, there is provided a worker management system for managing workers at a site, the system comprising:
A terminal device that sends position information, acceleration information, and gyro information via a network;
a server that receives the position information, the acceleration information, and the gyro information from the terminal device and registers them in chronological order;
The server is
a site information identification module for identifying a site where the terminal device is located based on information sent from the terminal device;
a terminal information acquisition module that acquires information about the terminal device;
a terminal position matching module that searches the current position or simulated position of the terminal device and dangerous positions existing in the direction of travel from the direction of travel;
a risk determination module that searches for risks at dangerous positions existing in the direction of movement of the terminal device;
A worker management system is provided, including: a risk notification module that transmits the risk to the terminal device.

The worker management system further includes a movement log that stores chronological location information of the terminal device, and identifies potential danger locations using the movement log.

The worker management system further searches for the dangerous position using the movement history acquired based on the position information, the acceleration information, and the gyro information from the terminal device.

When the worker management system receives beacon information from the terminal device, it searches for danger locations using the beacon's location information instead of GPS information.

According to another embodiment of the present embodiment, there is provided a computer program for causing a computer to function as a worker management system for managing workers at a site, the computer program including:
Receiving position information, acceleration information, and gyro information from a terminal device via a network;
Receiving and chronologically registering the position information, acceleration information, and gyro information from the terminal device; Identifying the site where the terminal device is located based on the information sent from the terminal device; ,
acquiring information of the terminal device;
searching for a current position or a simulated position of the terminal device and a dangerous position existing in the direction of travel from the direction of travel;
A computer program is provided that causes the computer program to execute the following steps: searching for a danger at a dangerous position existing in a direction of movement of the terminal device; and transmitting the danger to the terminal device.

The computer program further includes identifying potentially dangerous locations using a movement log that stores chronological location information of the terminal device.

The computer program further includes searching for the danger location using the movement history obtained based on the location information from the terminal device or the location information from a beacon, the acceleration information, and the gyro information.

According to the present invention, position information, acceleration information, gyro information, etc. from a mobile terminal owned by the worker is used to determine the worker's location at the work site, and the worker's location at the work site is used for predicting danger. It is possible to provide a worker management system and a computer program that make it possible to check the current status of workers.

FIG. 1 is a schematic diagram of a worker management system 100 according to an exemplary embodiment. FIG. 2 shows functional blocks 200 of the worker management system 100 in one embodiment. FIG. 3 shows a terminal information table 300 according to one embodiment. FIG. 4 shows a building information table 400 according to one embodiment. FIG. 5 illustrates a hazard information table 500 according to one embodiment used by worker management system 100. FIG. 6 shows an embodiment 600 in which a beacon is installed in a building 610 in this embodiment. FIG. 7 is a flow diagram of a worker management method executed by the worker management system 100 in one embodiment. FIG. 8 illustrates one embodiment of a general method 800 for predicting the risk of a terminal device 120 using GPS information in this embodiment. FIG. 9 illustrates another embodiment where the GPS information is unreliable and a beacon 650a is used. FIG. 10 is a diagram showing a hardware configuration 1000 of the server 110 of this embodiment.

100: Worker management system 101: Network 110: Server 120: Terminal device 203: Site information identification module 204: Terminal information acquisition module 205: Terminal position matching module 206: Risk determination module 207: Risk notification module 212: Movement log

The present invention will be described below using embodiments, but the present invention is not limited to the embodiments described below. FIG. 1 is a schematic diagram of a worker management system 100 according to an exemplary embodiment. The exemplary worker management system 100 of this embodiment can be configured as a cloud system. The worker management system 100 includes an information processing device 102, terminal devices such as a smartphone 103, and a tablet terminal 104 (hereinafter, a terminal device 120, which collectively includes mobile terminals such as a smartphone 103, a tablet terminal, a smart watch, and smart glasses 105). ) to enable the provision and management of various information.

In the present embodiment, the term "cloud system" refers to a computer system that provides cloud computing, and specifically, it can be implemented in a cloud computing environment that complies with, for example, JISX9401. That is, the worker management system 100 of the present invention provides convenient, on-demand access to a shared pool of configurable computing resources, such as networks, servers, storage, applications, and services, with minimal administrative effort or It is a model in which services can be quickly provided and used through interaction between service providers.

This cloud model promotes availability and represents a system consisting of five basic characteristics, three service models, and four deployment models. Further, the worker management system 100 of this embodiment can be implemented as a so-called SaaS. It goes without saying that in other embodiments, the system can use consumer/server systems other than cloud systems, as long as they can be provided as software-as-a-service.

More specifically, the worker management system 100 includes a network 101 such as a local area network (LAN), a wireless communication network, the Internet, or a combination thereof, an information processing device 102 connected to the network 101, a smartphone 103, It includes a tablet terminal 104, a terminal device 120 such as smart glasses 105, and a server 110. The server 110 processes requests sent from the terminal device 120, generates data used for worker management, and stores the data in a searchable manner in the database 106.

The information processing device 102 includes a persistent storage device such as a CPU, memory, SSD, and HDD, and supports an operating system such as Windows (registered trademark), iOS (registered trademark), CHROME (registered trademark), and ANDROID (registered trademark). Run the application program below.

In addition, the terminal device 120 such as a smart phone, tablet terminal, smart watch, or smart glasses refers to an information processing device that functions as a mobile terminal that a worker can carry on site, and is a terminal device. 120 is not particularly limited as long as it can execute an application program. Furthermore, the terminal device 120 is equipped with a web browser, and can process languages such as Java (registered trademark) Script to display, obtain data, or receive messages such as warnings.

In another embodiment, when a beacon is installed in a building to improve the accuracy of position detection, the terminal device 120 receives information from the beacon using a communication infrastructure such as Bluetooth (registered trademark), BLE beacon (trademark), or iBeacon (registered trademark). The information from the beacon is sent to the server 110, which notifies the location information of the terminal device 120 as the location information of the beacon. When the terminal device 120 detects a beacon, it sends the beacon identification value or location information, or a combination of these, along with information such as the terminal information and time of the detected terminal device 120 to the server 110, making the location information of the terminal device 120 available to the server 110.

The information processing device 102 and the terminal device 120 provide information to the server 110, and are equipped with application programs for receiving and displaying processing results, and perform distributed processing with the server 110. is possible. Note that the programs that are installed and function in the information processing device 102 and the terminal device 120 are generally referred to as a term "app" in this embodiment. The term "app" refers to a type of application program that provides an interface function for the information processing device 102 and terminal device 120 to exclusively access the server 110 and request processing, and refers to the installed and operating hardware. There are no restrictions on the types of hardware resources.

The server 110 is not particularly limited, and can be a dedicated server information processing device such as a workstation or blade server capable of providing the functions of a web server, and can provide the functions of the server 110 in FIG. 1 by mutual communication via the APIs of multiple servers as necessary.

For example, the information processing device 102 shown in FIG. 1 is located at a user (administrator) site, and is capable of inputting structural information such as location information, blueprints, or floor plans of a specific site. In addition, when using a beacon that specifies the location information of a building for structural information, for example, an operation is performed to associate the building structure with the beacon's location information and identification value, and global positioning (GPS) is performed within the building. ) is used to provide the location of the terminal device 120 based on beacon detection when location information is unavailable or inaccurate by the system. This structural information can be a PDF (Portable Document Format) that allows various types of embedding into the image. For example, by marking the dangerous position corresponding to the beacon position on the image data of the structure information, the processing of the server 110 can be made more efficient.

Further, for example, the information processing device 102 can acquire or acquire site structure information held by the construction support cloud system described in Patent No. 6795866 via an appropriate API, or both. . The designated or acquired structural information can be set or used as structural information of the worker management system 100 of this embodiment. In the case of this embodiment, worker information, site information, construction schedule information, etc. managed in Patent No. 6795866 can be shared via the cloud system.

When a beacon is used or used together, the latest position of the worker is obtained from the last detected beacon position using acceleration sensor information, gyro sensor information, and time information. can do.

The terminal devices 120 can send GPS information (such as the beacon identification value if present), acceleration information, gyro information, etc. to the server 110 periodically, for example at intervals of 1 second, 5 seconds, 10 seconds, 20 seconds, or 30 seconds. The server 110 uses the information received from each terminal device 120 to obtain the position of the terminal device 120, i.e., the worker, and the most recent acceleration information and gyro information. The server 110 uses the position information and acceleration information/gyro information received from the terminal devices 120 to predict dangers such as tripping, falling, and falling objects, and notifies the terminal devices 120.

In addition, within the building 107, if GPS information is inaccurate due to radio wave reflection, etc., the beacon's position coordinates and the mobile terminal's acceleration information and gyro information are used to determine the approach to a dangerous location. In an embodiment in which a beacon is used to identify position information, the beacon position and the dangerous location can be associated with world coordinates (latitude and longitude information provided by GPS information, etc.) and local coordinates (distance, angle, and altitude information from the on-site landmark) by calculations from design drawings or actual measurements using trigonometry, etc., based on the on-site landmark.

Furthermore, the server 110 manages a database 106 that stores information for evaluating the safety of workers at the site. The database 1067 makes it possible to determine the terminal device 120, the site, a dangerous place, and approach to a dangerous place.

Figure 2 is a diagram showing a functional block 200 of the worker management system 100 in one embodiment of the present invention. In Figure 2, each module of the worker management system 100 is described as being stored in a single server 110, but functions can be distributed to multiple servers 110 or information processing devices, taking into account the capabilities of the server 110, the availability of other servers, etc.

A module in this embodiment described below means a functional means implemented on a computer or computer system by causing a computer to execute a computer-executable program by its processor. The worker management system 100 includes a network I/F 201 and a terminal information identification module 202. The network I/F enables communication with the terminal device 120 via wired or wireless communication, and uses communication protocols such as TCP/IP and UDP to support Wi-Fi, 4G, 5G, LTE, Communication with the terminal device 120 is enabled under a communication method such as IEEE801.11xx.

The terminal information identification module 202 analyzes the data sent from the terminal device 120 and identifies the terminal information of the sender. For identification at this time, a telephone number, email address, SNS account name, etc. included in the data communication can be used. The information on the identified terminal device 120 makes it possible to identify which site the worker (that is, the terminal device 120) is at, and also makes it possible to link the terminal device 120 to a dangerous location on the site. .

Furthermore, the worker management system 100 includes a site information identification module 203 and a terminal information acquisition module 204.As described above, the site information identification module 203 identifies which site the received terminal device 120 is located at. At the same time, it is possible to refer to dangerous positions at the site.

The terminal information acquisition module 204 analyzes data communication received from the terminal device 120, acquires information such as a telephone number for uniquely identifying the terminal device 120, and owns the terminal device 120 and the terminal device 120. It is possible to link work shops. Further, the terminal information acquisition module 204 implements a function of receiving position information, acceleration information, gyro information, etc. from the data received from the terminal device 120, and acquiring the position information and traveling direction of the terminal device 120.

In another embodiment, when the GPS location information indicates outside the site or is not consistent over time, and the GPS information is unreliable, the beacon most recently detected by the terminal device 120 is identified, and the trajectory of the terminal device 120 from the most recently detected beacon to the present is simulated using acceleration information and gyro information to obtain the location information and traveling direction of the terminal device 120. A specific example of using a beacon to predict danger will be described in detail with reference to FIG. 9.

Furthermore, the worker management system 100 includes a terminal position verification module 205, a danger determination module 206, and a danger notification module 207. The terminal position matching module 205 provides a function of searching the current position or simulated position of the terminal device 120 and dangerous positions existing in the direction of travel by referring to the database 106. If a plurality of dangerous positions are detected along the direction of travel, the direction of travel is linearly extrapolated and the closest dangerous position is set as the first position for risk determination.

The risk determination module 206 determines the risks associated with the determined dangerous position, such as falling, overturning, working at heights (working on the scaffolding 660 installed in the building 610), falling objects, and working with heavy objects. (Accumulation and transportation location of scaffolding 660), extracts the possibility of objects falling from the upper floors, etc., and notifies workers of the danger in advance by sending a warning corresponding to the content of the danger to the terminal device 120. make it possible.

In response to the judgment of the danger judgment module 206, the danger notification module 207 predicts danger in an appropriate manner to the terminal device 120. For example, the danger notification module 207 can send the danger to the terminal device 120 in the form of a message, SNS, email, etc., in the form of a simple text message, a still image, a video, or a combination thereof. The displayed text message can be displayed on the display screen of the smartphone 103, or can be displayed by, for example, a smart watch or smart glasses 105. When displayed on the smart glasses 105, the worker can be saved from the trouble of checking the terminal device 120 each time.

Further, the worker management system 100 includes a database access module 208. The database access module 208 receives the database search requests from the field information identification module 203, the terminal information acquisition module 204, the terminal location verification module 205, and the risk determination module 206, searches the database 106, and searches the database 106. The results are returned to the requester, allowing them to perform their own processing.

The database 106 manages terminal information data 209, building information 210, risk information 211, and movement log 212. Terminal information data 209 is data that links terminal information and workers. The building information 210 stores a building, a dangerous location, and location information based on GPS information, or location information of a beacon closest to the dangerous location. The hazard information 211 manages the details of the dangers assumed at dangerous positions in buildings, specifically, the risks of falling, falls, lower back pain caused by falling objects or heavy object work, and other risks by linking them to the dangerous positions. . Furthermore, the movement log 212 stores the movement history of a predetermined terminal device 120 from GPS information (position information from a beacon, if any), acceleration information, gyro information, etc. Enables discovery of new dangerous locations.

Figure 3 shows a terminal information table 300 according to one embodiment. The terminal information table 300 is telephone numbers and other unique identification information that are necessarily included in communication data, such as the telephone number of the terminal device 120. Worker information is information such as the first and last name of the worker who owns the terminal device 120 and a worker identification value. Site information is information that identifies the site, such as a building, where the worker of the terminal device 120 performs work.

If another system such as a construction management system is available, the terminal information table 300 shown in FIG. It can be called and used from the system via API.

FIG. 4 illustrates a building information table 400 according to one embodiment. The building information table contains the building identification value, the dangerous location of the building, and the location information of the dangerous location, such as latitude, longitude, and altitude (world coordinate system), or the identification value or location information of the nearest beacon (local coordinate system). or both. By using these data, it is possible to link the position information of the terminal device 120 and the dangerous position.

Upon receiving the communication from the terminal device 120, the worker management system 100 acquires at least building information and location information of the dangerous location from the received data, and provides a danger prediction function using the location information of the terminal device 120. can do.

Figure 5 shows a risk information table 500 according to one embodiment used by the worker management system 100. The risk information table 500 stores the risk location of the building, the details of the risk, and the acceleration information or position information or thresholds for both of them corresponding to the details of the risk as reference information. When it is determined that the terminal device 120 is approaching the risk location, the details of the risk stored in the risk information table 500 are searched by the risk determination module 206 of the worker management system 100, and the search results are sent to the terminal device 120 via the risk notification module 207.

In addition, the acceleration information and location information (including altitude information) corresponding to the content of the danger are used to determine whether or not an incident corresponding to the content of the danger has occurred at that location, and by analyzing the movement log 212 after the fact, it is possible to analyze so-called "near misses" without waiting for a report from the worker.

FIG. 6 shows an embodiment 600 in which a beacon is installed in a building 610 in this embodiment. Depending on the location conditions of a building or the construction details, the positional accuracy of GPS information may be reduced due to reflection of GPS radio waves. In addition, especially at construction sites, people frequently enter and exit the building. Therefore, it is necessary to be able to manage workers in either environment. That is, even if GPS information can be used when working outdoors, when working indoors, the location information sent from the terminal device 120 is not sufficient to accurately judge the danger, so a beacon with identified location information is used as a reference. Therefore, it is necessary to simulate the position information of the terminal device 120.

For example, the location of an installed beacon can be determined from a design drawing or by trigonometry using the distance and angle from a pillar, beam, or other landmark that constitutes a corner of a particular floor of the building 610, for example. can be defined. Similarly, dangerous positions assumed in advance can be specified by angle and distance from the same landmark by measurement on a design drawing or actual measurement. In the case of hazard prediction using beacons, position measurements using these local coordinates are used. The worker management system 100 judges the accuracy of the GPS information and performs processing by switching between risk prediction using the world coordinate system or the local coordinate system for each specific worker.

As shown in FIG. 6, the beacon 650 can be installed in a fixed arrangement, for example, on the ceiling or wall of the building 610, or on the floor or under the floor if it does not interfere with work. In another embodiment, beacons can be installed only near dangerous positions where danger is predicted in advance, but for the purpose of discovering dangerous positions that have not yet been fully grasped, multiple beacons can be placed at regular intervals. It is preferable that Note that FIG. 6 exemplarily shows a fall of the worker 620, a fall of the worker 630, and a worker 640 who is working with heavy objects or who is likely to fall from an object falling from an upper floor. ing. Note that in this embodiment, the beacon used may be an i-Beacon (registered trademark), a BLE beacon (trademark), or a combination thereof, but is not limited thereto.

FIG. 7 is a flow diagram of a worker management method executed by the worker management system 100 in one embodiment. The worker management method 700 starts in S700 and acquires information from the terminal device 120 or beacon in S701. In S702, the worker management method 700 acquires the building that the worker is in charge of from the terminal information. In S703, the worker management method 700 extracts dangerous locations in the building, and in S704, if the GPS information can be used as is, the location of the terminal device 120 is acquired from the GPS information, and beacon information is received together with the GPS information. If the GPS information is unreliable, the information from the beacon is used for calculation.

In S705, the traveling direction of the terminal device 120 is calculated from the time sequence of the calculated position information, acceleration information, and gyro information, and it is determined whether the terminal device 120 approaches a dangerous position. This is because even if the terminal device 120 is located near the dangerous position, if the terminal device 120 is moving in a different direction, for example, there is a high possibility that the terminal device 120 will not pass through the dangerous position.

If it is determined that the terminal device 120 is approaching a dangerous position (Yes in S706), danger information associated with the approaching dangerous position is sent to the terminal device 120 in S706; Urges workers to be careful. On the other hand, if the terminal device is not approaching the dangerous position (No in S706), the process returns to S704 and position acquisition is repeated.

In S708, the worker management method 700 determines whether there is an abnormality in the position information, acceleration information, or both, that is, whether the abnormal value threshold associated with the dangerous position has been exceeded. If a value exceeding the abnormal value threshold associated with a dangerous position is detected, it is assumed that a fall or fall may have occurred despite the notification, and the site is notified in S709. and instruct them to check the situation.

If it is determined in S708 that there is no abnormality in both the position information and the acceleration information, the process branches to S710, and detects the position information and acceleration information at locations other than the dangerous position. Thereafter, in S711, it is determined whether or not there has been a change in position information/acceleration information at a position that has not been identified as a dangerous position. This determination can be made using whether any one of the basic information shown in FIG. 5 has been exceeded or whether it has come close to a set range.

In this case, in step S712, a command is issued to the site manager or the like to check the situation, and the location can be registered as a new dangerous location. In addition, even if it does not lead to an accident, if the same position information and acceleration information change repeatedly at the same position, the number of changes is accumulated, and when a predetermined number of changes are reached, it is classified as a dangerous position and managed by the worker. The system 100 can be trained.

For learning, near-miss cases are used as training data to identify situations where large changes in position information and acceleration information repeatedly occur even though they are not recognized as dangerous positions at the site (steps, the presence of obstacles, beams, etc.). Supervised learning can be performed using additional data such as presence, position/acceleration changes, and site photographs). The results of the learning can be used, for example, by the information processing device 102 to set future danger positions.

Regression neural networks can be used as machine learning methods, and convolutional neural networks can be used in conjunction with image analysis. By using regression neural networks and convolutional neural networks, a graphical layout of the scene can be used to classify hazards and notify workers. For example, open source machine learning systems that enable machine learning include, but are not limited to, MATHLAB (registered trademark), Apache Matout, Compose, Core ML Tools, Cortex, Oryx, Mathlib, AWS, Weka, etc. can be used. Furthermore, if necessary for movement history analysis, the direction of movement of the worker can be predicted using the long short-term memory (TSTM).

Figure 8 shows one embodiment of a schematic method 800 for predicting risk to the terminal device 120 using GPS information in this embodiment. In the embodiment shown in Figure 8, the terminal device 120 owned by the worker 620 can send GPS information, acceleration information, and gyro information to the server. The location information and other information sent from the terminal device 120 can be sent at intervals of about 1 to 30 seconds, which is an interval that allows the direction of travel to be determined sufficiently.

In this embodiment, when beacon information is detected, the traveling direction of the terminal device 120 is estimated from the acceleration information and gyro information received so far using the position of the beacon as a starting point. Specifically, using data that can be used before and after the beacon is detected, the traveling direction is simulated from acceleration information and gyro information with the position coordinates of the beacon 650a as a reference.

The server 110 analyzes the position information sent from the terminal device 120 in chronological order and determines the direction in which the terminal device 120 is traveling. In the embodiment shown in FIG. 8, worker 620 is moving generally in a straight line in the direction of arrow A. In the embodiment shown in FIG. By analyzing the traveling direction, the server 110 acquires danger information linked to the danger position 810 closest to the traveling direction and sends it to the terminal device 120. After that, the server 110 further acquires the movement history of the terminal device 120. While monitoring, it is possible to monitor whether there are any problems at the dangerous position.

For example, in FIG. 8, when the worker 620 changes the direction of travel in the direction of the arrow B, the server 110 detects the change, predicts a new dangerous position 820, and sends the terminal device 120 to the terminal device 120. Send a new message such as ``There is a dangerous position △△ about ○○ meters ahead. Please work with caution.'' The message can be sent to the terminal device 120 along with image data (still photos, videos, etc.) of the relevant site.

Figure 9 shows another embodiment in which GPS information is unreliable and a beacon 650a is used. The beacon 650a and the terminal device 120 held by the worker 620 can communicate with each other using, for example, Bluetooth (registered trademark) or an appropriate beacon protocol. For example, when the terminal device 120 enters the communication range 650b of the beacon as the worker 620 moves, the terminal device 120 receives a signal from the beacon 650a and notifies the server 110 of the detection of the beacon 650a along with the terminal information, GPS information, acceleration information, gyro information, etc.

FIG. 9 shows an embodiment of obtaining position coordinates by trigonometry to obtain the respective positions of the beacon 650a and the danger position 810. As landmarks, for example, earthquake-resistant columns 670 and 680 that define diagonals of the building can be used. Since the baseline length between the seismic pillars 670 and 680 is known, local coordinates are specified as the coordinates of (θ1, θ2) using trigonometry.

Furthermore, the position of the beacon 650a can be determined in a similar manner. Further, as the local coordinates, the measurement result using the above-mentioned trigonometry can be registered as (x, y) coordinates, for example, with the position of the seismic pillar 670 as (0, 0). The distance between beacon 650a and danger location 810 can also be determined using Euclidean distance or Manhattan distance. In addition, if it is assumed that the worker will take a predetermined route such as on a scaffold, on a catwalk, or on a designated path within the site, Euclidean distance, Manhattan distance, etc. along the predetermined route can be calculated. can be used and defined.

On the other hand, the terminal device 120 sends the GPS information to the server 110 at regular intervals regardless of the accuracy of the information, so the server 110 can track the trajectory of the terminal device 120. In this embodiment, when beacon information is detected, the traveling direction of the terminal device 120 is estimated from the acceleration information and gyro information received up to that point, starting from the position of the beacon.

In the embodiment of FIG. 9, available data before and after the beacon is detected (giving the trajectory shown by arrow C) is used to simulate the direction of travel from acceleration information and gyro information based on the history of approach to beacon 650a and the position coordinates of beacon 650a (trajectory shown by arrow D).

As a result of the simulation, if it is determined that the terminal device 120 is approaching the dangerous position 810, the server 110 sends a notification informing the worker 620 of the danger to the terminal device 120, e.g. "There is a dangerous position marked △△ about ○○ meters ahead. Please work with caution." is sent. Note that in the embodiment shown in FIG. 9, the server 110 also monitors the movement history from the beacon 650a to the dangerous position 810, so if a change in the direction of movement of the worker 620 is detected, it searches for and notifies a new dangerous position. becomes possible.

The above processing makes it possible to predict danger to workers even when GPS information does not have a sufficient system, such as in a module inside the building 610, and to prevent the possibility of an accident occurring on site. can be lowered. Furthermore, in this embodiment, since a movement log of the worker can be generated, it is possible to manage the movement of the worker. Furthermore, in addition to dynamic management, information such as acceleration information and gyro information can also be managed in association with each other, making it possible to discover and identify potentially dangerous positions. In addition to making predictions, it is possible to extract hazardous locations that are highly dependent on the site from daily construction work, and to link this to safety management.

FIG. 10 is a diagram showing a hardware configuration 1000 of the server 110 of this embodiment. The server 110 of the present invention includes a central processing unit (CPU) 1001 and a memory 1002 formed from a solid-state memory element such as RAM or DRAM that enables processing by the CPU 1001. CUP 1001 and memory 1002 are connected to other devices or drivers of server 110, such as graphics driver 1003 and network device (NIC) 1005, via system bus 1010. Graphics driver 1003 is connected to display 1004 via an appropriate bus to display processing results by CPU 1001 on the display screen.

The network device 1005 also connects the server 110 at the transport layer level and the physical layer level to the network to establish sessions with user terminals.

An I/O bus bridge 1006 is further connected to the system bus 1010. A storage device 1007 such as a hard disk is connected to the downstream side of the I/O bus bridge 1006 via an I/O bus 1009 such as PCI, using IDE, ATA, ATAPI, serial ATA, SCSI, USB, etc. There is. Further, an input device 1008 such as a keyboard and a pointing device such as a mouse is connected to the I/O bus 1009 via a bus such as a USB, and receives inputs and commands from an operator such as a system administrator.

More specifically, the CPU 1001 used by the server 110 includes, for example, PENTIUM (registered trademark) to PENTIUM IV (registered trademark), PENTIUM (registered trademark) compatible CPU, CORE2DUO (registered trademark), COREi3 to i9 (registered trademark). ), POWER PC (registered trademark), and XEON (registered trademark).

In addition, the operating system (OS) to be used may be MacOS (registered trademark), Windows (registered trademark), Windows (registered trademark) 20XX Server, UNIX (registered trademark), AIX (registered trademark), LINUX (registered trademark), or Other suitable OSs may be mentioned. Furthermore, the server 110 stores application programs written in object-oriented programming languages such as C++, Visual C++, Visual Basic, Java (registered trademark), Perl, Ruby, PHP, and AJAX, which run on the above-mentioned OS. and can be executed.

The above functions of this embodiment are implemented using object-oriented programming languages such as C++, Java (registered trademark), Java (registered trademark) Beans, Java (registered trademark) Applet, Java (registered trademark) Script, Perl, Ruby, PHP, and AJAX. It can be realized by a device-executable program written in, etc., and can be stored and distributed in a device-readable recording medium.

Although the present invention has been described with reference to embodiments, the present invention is not limited to the embodiments, and may include other embodiments, additions, changes, deletions, etc. within the scope that can be conceived by those skilled in the art. Any of the embodiments may be modified, and any embodiment is included within the scope of the present invention as long as the functions and effects of the present invention are achieved.

Claims (7)

A worker management system for managing workers at a site,
a terminal device that transmits position information, acceleration information, and gyro information via a network;
a server that receives the position information, the acceleration information, and the gyro information from the terminal device and registers them in chronological order;
The server,
a site information identification module for identifying a site where the terminal device is located based on information sent from the terminal device;
A terminal information acquisition module for acquiring information of the terminal device;
a terminal location matching module for searching for danger locations in the direction of travel based on the current or simulated location of the terminal device and the direction of travel;
a risk determination module that searches for risk at a risk position present in the traveling direction of the terminal device;
a danger notification module that transmits the danger to the terminal device. The worker management system according to claim 1, wherein the worker management system includes a movement log that stores time-series position information of the terminal device, and uses the movement log to identify potentially dangerous positions. system. The worker management system searches for the dangerous position using a movement history acquired based on the position information, the acceleration information, and the gyro information from the terminal device. Worker management system. The worker management system according to claim 1, wherein when receiving beacon information from the terminal device, the worker management system uses the beacon position information instead of GPS information to search for a dangerous position. system. A computer program for causing a computer to function as a worker management system for managing workers at a site, the computer program comprising:
Receiving position information, acceleration information, and gyro information from a terminal device via a network;
Receiving and chronologically registering the position information, acceleration information, and gyro information from the terminal device; Identifying the site where the terminal device is located based on the information sent from the terminal device; ,
acquiring information of the terminal device;
searching for a current position or a simulated position of the terminal device and a dangerous position existing in the direction of travel from the direction of travel;
A computer program that causes the following operations to be performed: searching for a danger at a dangerous position existing in a direction of movement of the terminal device; and transmitting the danger to the terminal device. The computer program further includes: identifying a potentially dangerous location using a movement log that stores time-series location information of the terminal device.
A computer program according to claim 5. The computer program searches for the dangerous position using the movement history acquired based on the position information from the terminal device or the position information from a beacon, the acceleration information, and the gyro information. 6. The computer program according to claim 5, comprising: