KR102618854B1 - Worker safety managing system and method - Google Patents

Abstract

The present invention relates to a worker safety management system and method. The worker safety management system comprises: a database; a worker terminal for generating a location notification signal; a wireless LAN support device; and a worker safety management server. According to the present invention, the location of a worker can be more accurately identified.

Description

Worker safety management system and method {Worker safety managing system and method}

The technical field of the present invention relates to worker safety management systems and methods. In particular, the worker's location is more accurately confirmed through communication linkage between wireless LAN support devices and worker terminals in shaded areas of construction sites, and worker terminals are used to monitor worker safety. It relates to worker safety management systems and methods implemented to manage the safety of.

Among construction sites, work performed in shaded areas where GPS (global positioning system) transmission and reception are not smooth, such as indoors or in basements, is carried out within the working time agreed upon between the construction site manager and workers. This is because it is difficult to determine the location of workers in real time through GPS when working within the shaded area of a construction site. In addition, when a worker approaches a hazardous area in a shaded area or performs work in a hazardous area, it has the disadvantage that the worker or construction site manager cannot know if an accident occurs due to an unexpected situation. In addition, if such an accident occurs, or if the work time is delayed and the work time agreed between the construction site manager and the worker is exceeded, the worker's location cannot be determined, so it may not be possible to secure a safe distance between the worker and the hazardous area. In addition, it has the disadvantage that additional accidents may occur.

A way to manage the construction site in real time is to comprehensively use CCTV, WiFi, beacons, and broadband communication technologies, and utilize the wireless communication technology of installed devices to track the location of workers or inform construction site managers or workers. Some include performing safety management, such as sending hazard warning messages. In the case of construction sites, management of workers and equipment is necessary for rapid disaster response and response, and access control of equipment and personnel must be monitored at all times. However, unlike the general terrestrial environment, in the shadow area of the construction site, it is difficult to collect real-time data as it is a shadow area not only for GPS but also for wireless communication due to the isolated situation from the outside, making it difficult to comprehensively manage it from the outside using general methods. , there were also disadvantages in that it was difficult to communicate internally between workers, determine their location, and respond to risks.

Korean Patent No. 10-2184093 (registered on November 23, 2020) discloses a wireless communication shadow area safety management system using a Bluetooth communication network, which includes a beacon unit including a worker beacon attached to personnel or equipment; A mesh relay unit including a mesh repeater that communicates with the beacon unit using Bluetooth communication; It includes an external control unit that determines the location of the worker beacon using information received through the mesh repeater, and the external control unit is a wireless communication shadow area safety management system that determines the location of the worker beacon using the location information of the mesh repeater. , the mesh repeater calculates the installation location where communication interference is minimized by checking the reception sensitivity from surrounding mesh repeaters, and determines the optimal installation location through matching with the installation location calculated using preset communication parameters and physical terrain variables. a position setting module that calculates; And the mesh repeater compares the reception sensitivity of the packet received from the beacon included in the beacon unit with the corresponding reception sensitivity set in advance, and determines the location corresponding to the reception sensitivity with the highest similarity as the location of the beacon that transmitted the packet. It includes, and the preset corresponding reception sensitivity is characterized by being set in advance by dividing the preset sound range area through a fingerprinting method and setting the reception sensitivity of the packet measured in each divided area as the corresponding reception sensitivity in each divided area. Do it as According to the disclosed technology, communication is possible in underground spaces where communication shadow areas such as mines exist, and the location of workers or equipment can be identified and recorded in real time using the system, and real-time information recorded over time. Accordingly, it is possible to recreate the situation at the time of an accident, so it can be used for training to prevent recurrence of accidents for workers or equipment by reflecting the characteristics of the field. Due to the nature of Bluetooth communication, even if a problem occurs in some repeaters, other repeaters can be used. Since communication is possible through , the risk of extreme emergency situations such as communication interruption is relatively lower than other communication methods, and in the case of portable communication devices (beacons), they are light and easy to carry and can be attached to equipment or hard hats, etc. Therefore, the risk of loss or breakdown is lowered.

Korean Patent No. 10-2298309 (registered on August 31, 2021) allows the location of a work group to be transmitted to the control server in real time through the location information of the RFID post stored in the RFID tag, and the control server can track the location of the work group in real time. By comparing the operation information of the train and the train, the safety of the work group can be secured by determining whether the work group is at risk and notifying it. In addition, the control server communicates with one group leader terminal to provide location and work group information of all workers. Disclosed is a worker safety monitoring system and method that can receive and improve communication and management efficiency. According to the disclosed technology, an RFID recognition step in which worker terminals each recognize an RFID tag mounted on an RFID post installed in a work area and automatically select a group leader terminal from among the worker terminals; A recognition information transmission step in which group member terminals among worker terminals transmit recognition information to the group leader terminal; A work group information transmission step in which the group leader terminal transmits recognition information received from group member terminals and work group information including the recognition information of the group leader terminal to the control server; A comparison step in which the control server compares work group information and train operation information to calculate a result; A risk situation determination step in which the control server determines whether the work group is at risk by comparing the result with a reference time; And if the control server determines that the work group is dangerous, it includes a notification step to notify the group member terminal, group leader terminal, and driver terminal of the dangerous situation, and if the group member terminal or group leader terminal leaves the work area, a notification sound is provided. By notifying departure from the work area, a return to the work area is encouraged, and when the group member terminal or group leader terminal returns to the work area, the RFID tag of the RFID post is recognized again and included in the work group.

In the conventional technology as described above, not only is it still difficult to accurately determine the location of the worker in the shadow area of the construction site, but in order to more accurately determine the location of the worker in the shadow area of the construction site, more equipment is needed to recognize the worker terminal. Since a repeater must be installed, it also has the disadvantage of increasing installation and operating costs.

Korean Patent No. 10-2184093 Korean Patent No. 10-2298309

The problem to be solved by the present invention is to solve the above-described shortcomings, and is to more accurately determine the location of workers through communication linkage between wireless LAN support devices and worker terminals in shadow areas of construction sites, and communication linkage between worker terminals. It provides a worker safety management system and method implemented to check and manage worker safety.

Means for solving the above-mentioned problem include, according to one feature of the present invention, a database for pre-setting and registering distance information corresponding to signal strength or other signal strengths; It generates a location notification signal to notify the worker's location and transmits it as a location notification signal containing worker identification information. It also receives other location notification signals containing other worker identification information transmitted from other worker terminals and measures the strength of other signals. A worker terminal for transmitting other worker identification information, other signal strength, and other location notification signals including worker identification information; It is fixedly installed in a shaded area of a construction site, receives a location notification signal containing worker identification information transmitted from the worker terminal, measures the signal strength, and transmits it as a location notification signal containing worker identification information, signal strength, and device identification information, Receive other location notification signals including other worker identification information, other signal strength, and worker identification information transmitted from the worker terminal and transmit them as other location notification signals including other worker identification information, other signal strength, worker identification information, and device identification information. Wireless LAN support device to provide; And receiving a location notification signal including worker identification information, signal strength, and device identification information transmitted from the wireless LAN support device, or another location notification signal including other worker identification information, other signal strength, worker identification information, and device identification information, and receiving a signal. It reads distance information corresponding to the intensity or other signal intensity from the database, and uses the read distance information to determine the location of the worker or other workers, including a worker safety management server to manage the safety of the worker or other workers. Provides a worker safety management system.

In one embodiment, the worker terminal generates an app download request signal and transmits it through the wireless LAN support device or to the worker safety management server, then downloads the worker safety management app and stores it in the internal memory. do.

In one embodiment, when running a worker safety management app, the worker terminal generates a location notification signal and transmits it to the wireless LAN support device, including worker identification information, and other workers transmitted from other worker terminals. It is characterized by receiving other location notification signals containing identification information, measuring the strength of other signals, including worker identification information, and transmitting them to the wireless LAN support device.

In one embodiment, the worker terminal is characterized by being equipped with at least one or more wireless communication modules among an RTLS communication module, a UWB communication module, a WiFi communication module, a Bluetooth communication module, and a ZigBee communication module.

In one embodiment, the worker terminal performs a wireless communication connection with another worker terminal using the wireless communication module, receives another location notification signal including other worker identification information transmitted from the other worker terminal, and receives another signal. It is characterized by measuring intensity.

In one embodiment, the worker terminal performs a wireless communication connection with the wireless LAN support device using the wireless communication module, generates a location notification signal and transmits it to the wireless LAN support device including worker identification information. It is characterized in that it generates another location notification signal including other worker identification information, other signal strength, and worker identification information and transmits it to the wireless LAN support device.

In one embodiment, the worker terminal is characterized by measuring the strength of another location notification signal including other worker identification information received from another worker terminal using a UWB communication module.

In one embodiment, the worker terminal is a wireless base station containing a unique identifier of the terminal, at least one or more of a signal indicating its own location, a signal for assigning a wireless base station, and a signal for call connection with the wireless base station. It is characterized by transmitting a unique signal as a location notification signal.

In one embodiment, the worker terminal transmits a unique signal including the terminal's unique identifier, receives another unique signal including the other terminal's unique identifier transmitted from another worker terminal, measures the strength of the other signal, and determines the other terminal's unique identifier. and transmitting the strength of other signals by including them in a unique signal including the terminal's unique identifier.

In one embodiment, the worker terminal is characterized in that it receives a risk notification message including distance information between the worker or other workers and the risk area from the wireless LAN support device and notifies a warning about the risk area through an output means. .

In one embodiment, the worker terminal has a gyro sensor for detecting sudden movement of the terminal, a shock detection sensor for detecting whether an impact has occurred in the terminal, and a camera to capture the situation surrounding the terminal to determine whether the captured image is a dangerous situation image. It is equipped with at least one or more hazardous situation recognition modules using cameras to detect when an accident occurs to a worker due to an unexpected situation when the worker or another worker performs work in a hazardous area. , and is characterized in that the occurrence of a detected accident is notified to the wireless LAN support device.

In one embodiment, the wireless LAN support device receives an app download request signal from the worker terminal and transmits it to the worker safety management server, and receives the worker safety management app from the worker safety management server and transmits it to the worker terminal. It is characterized by:

In one embodiment, the wireless LAN support device includes at least one or more wireless communication modules selected from the group consisting of an RTLS communication module, a UWB communication module, an RF communication module, a WiFi communication module, a Bluetooth communication module, and a ZigBee communication module. Characterized by receiving a location notification signal containing worker identification information transmitted from the worker terminal and measuring the signal strength, or receiving another location notification signal containing other worker identification information, other signal strength, and worker identification information transmitted from the worker terminal. do.

In one embodiment, the wireless LAN support device is characterized by measuring the strength of a location notification signal containing worker identification information received from the worker terminal using a UWB communication module.

In one embodiment, the wireless LAN support device is characterized in that it performs time synchronization with other wireless LAN support devices by setting the time in response to a time synchronization signal received from the worker safety management server.

In one embodiment, the wireless LAN support device performs a communication connection between a master and a slave, and the master side generates a time synchronization signal to synchronize the time and transmits it to the slave side, and the slave side responds to the received time synchronization signal. It is characterized by synchronizing the time between each other by setting the time accordingly.

In one embodiment, the wireless LAN support device receives a risk notification message from the worker safety management server and transmits it to the worker terminal.

In one embodiment, the wireless LAN support device receives the occurrence of an accident notified from the worker terminal and notifies the worker safety management server.

In one embodiment, the wireless LAN support device is characterized by having a battery for supplying power to the device in a detachable form from the main case.

In one embodiment, when the wireless LAN support device is formed as an independent device equipped with a battery, it is characterized in that it checks the status or usable time of the battery and notifies it to the worker safety management server.

In one embodiment, the worker safety management server receives an app download request signal from the wireless LAN support device or the worker terminal, reads the worker safety management app from the database, and sends it to the wireless LAN support device or the worker terminal. Characterized by transmission.

In one embodiment, the worker safety management server determines the location of the worker or other workers using distance information read from the database, collects the determined positions of the worker or other workers, and tracks the movement of the worker or other workers. , It is characterized by managing the safety of the worker and other workers by storing the tracked movement path of the worker or other workers in the database according to worker identification information or other worker identification information.

In one embodiment, the worker safety management server is provided with a distance measurement software platform, collects data on signal strength or other signal strengths received from the wireless LAN support device, and analyzes the signal strength data through scatter plot analysis. It determines the actual location of the worker or other workers, tracks the movement of the worker or other workers, and performs secondary measurements and complementary algorithms through the wireless LAN support device to return more accurate location information of the worker or other workers. Do it as

In one embodiment, the worker safety management server includes a reader interface that receives a signal transmitted from the wireless LAN support device and notifies a reception event, and then receives location information and stores it as input queue information; Using a distance measurement method using TDOA, the time difference taken for a signal to be transmitted between the worker terminals or between the worker terminal and the wireless LAN support device is measured according to the reception event notified from the reader interface, and the measured time difference A TDOA location engine that converts to a distance to estimate the location of the worker or other workers, transmits the estimated location information to the reader interface, and then receives an information list to track the positions of the worker or other workers; and a data queue that sequentially registers input cue information transmitted from the reader interface and transmits an information list about the registered input cue information to the TDOA location engine.

In one embodiment, the TDOA location engine calculates the location of the worker or other workers using points where the difference in signal transmission time between the worker terminals or between the worker terminal and the wireless LAN support device is constant, and at this time, triangulation is used. It is characterized by calculating the position of the worker or other workers using the method.

In one embodiment, the worker safety management server generates a time synchronization signal for time synchronization at preset times and transmits it to the wireless LAN support device.

In one embodiment, the worker safety management server uses a distance measurement method using TDOA and additionally combines RSSI to minimize temporal errors that may occur in the multipath path, thereby It is characterized by determining the location of the worker or other workers after selecting the strongest signal.

In one embodiment, the worker safety management server, while tracking the movement path of the worker or other workers, receives a location notification signal including worker identification information, signal strength, and device identification information transmitted from the wireless LAN support device, or other workers. If the location of the worker or other workers cannot be confirmed due to the inability to receive other location notification signals including identification information, other signal strength, worker identification information, and device identification information, the wireless LAN is supported at the location where the final movement path was traced. It is characterized by generating a device installation command to install additional devices and notifying the manager or operator of this.

In one embodiment, the worker safety management server compares the location of the worker or other workers with the dangerous area location information registered in the database, calculates the distance between the worker or other workers and the dangerous area, and the calculated distance is the It is characterized in that it checks whether the distance is a safe distance, a normal distance, or a dangerous distance registered in the database, generates a risk notification message, and transmits it to the wireless LAN support device.

In one embodiment, when a worker or another worker approaches a hazardous area, the worker safety management server checks whether the worker or other worker approaching the hazardous area is an accessible worker registered in the database, and then performs the task. When the user or another worker is not an accessible worker, a risk notification message is generated and transmitted to the wireless LAN support device.

In one embodiment, the worker safety management server receives the occurrence of an accident notified from the wireless LAN support device and notifies the manager or operator.

In one embodiment, the worker safety management server receives the battery status or available time notified from the wireless LAN support device and replaces the battery when the battery status or available time reaches a preset limit. It is characterized by notifying the manager or operator.

In one embodiment, in the database, distance information corresponding to other signal strengths is preset for each worker identification information and registered in a database, and distance information corresponding to signal strength for each device identification information is preset and registered in a database. It is characterized by registration.

In one embodiment, the database maps the installation location data of the wireless LAN support device to the shaded area location data of the construction site, allowing the location of workers or other workers to be confirmed in correspondence to the location of the shaded area of the construction site. It is characterized by

In one embodiment, the database is characterized by pre-setting and registering a worker safety management app to manage the safety of workers by more accurately confirming the location of workers or other workers.

In one embodiment, the database is characterized by registering the movement paths of workers and other workers transmitted from the worker safety management server into a database according to worker identification information or other worker identification information.

In one embodiment, the database is characterized in that information related to the worker terminal, information related to the wireless LAN support device, and location data of shaded areas of the construction site are set in advance and registered in a database.

In one embodiment, the database pre-establishes and registers location information on dangerous areas among the shaded areas of the construction site into a database, and divides them into safe distances, normal distances, and dangerous distances depending on the distance from the dangerous areas. It is characterized by being set and registered in advance.

In one embodiment, the database is characterized by pre-setting and registering information about workers who can access hazardous areas.

As a means of solving the above-described problem, according to another feature of the present invention, the database includes the steps of pre-setting and registering distance information corresponding to signal strength or other signal strengths; Generates a location notification signal for the worker terminal to notify the worker's location and transmits it as a location notification signal containing worker identification information, and receives other location notification signals containing other worker identification information transmitted from other worker terminals to strengthen other signals. Measuring and transmitting as another location notification signal including other worker identification information, other signal strength, and worker identification information; A wireless LAN support device fixedly installed in a shaded area of a construction site receives a location notification signal containing worker identification information transmitted from the worker terminal, measures the signal strength, and transmits a location notification signal containing worker identification information, signal strength, and device identification information. Receives other location notification signals including other worker identification information, other signal strength, and worker identification information transmitted from the worker terminal, and receives other location notification signals including other worker identification information, other signal strength, worker identification information, and device identification information. Step of transmitting to; And a location notification signal containing worker identification information, signal strength, and device identification information transmitted by the worker safety management server from the wireless LAN support device, or another location notification signal containing other worker identification information, other signal strength, worker identification information, and device identification information. It includes the step of receiving, reading distance information corresponding to signal strength or other signal strength from the database, and using the read distance information to determine the location of the worker or other workers to manage the safety of the worker or other workers. Provides worker safety management methods.

The effect of the present invention is worker safety management implemented to manage the safety of workers by more accurately confirming the location of workers through communication linkage between wireless LAN support devices and worker terminals in shaded areas of construction sites and communication linkage between worker terminals. By providing a system and method, the location of workers can be confirmed more accurately even if fewer wireless LAN support devices are installed in shaded areas of a construction site, making installation and operating costs lower.

According to the present invention, the location of the worker can be determined more accurately in real time through communication linkage between the wireless LAN support device and the worker terminal in the shaded area of the construction site and communication linkage between the worker terminal, so that the worker can identify the dangerous area among the shaded area. Even if an accident occurs to a worker due to an unexpected situation occurring when approaching or working in a hazardous area, the worker or construction site manager can be notified immediately. In addition, if such an accident occurs or work hours are shortened, the worker or construction site manager can be notified immediately. Even if there is a delay and the work time agreed between the construction site manager and the worker is exceeded, it is possible to ensure a safe distance between the worker and the hazardous area, and to prevent additional accidents from occurring, and this can be integrated externally. It has the effect of making it easier to manage the system, as well as to facilitate internal communication between workers, location identification, and response to risks.

1 is a diagram explaining a worker safety management system according to an embodiment of the present invention.
FIG. 2 is a diagram illustrating an example of a simulation of the movement path of a worker or other workers in the worker safety management server in FIG. 1.
FIG. 3 is a diagram illustrating the signal strength or other signal strengths in the worker safety management server in FIG. 1 as an example.
FIG. 4 is a diagram showing an example of signal strength data scatter diagram analysis in the worker safety management server in FIG. 1.
FIG. 5 is a diagram showing an example of the location confirmation module structure in the worker safety management server in FIG. 1.
FIG. 6 is a diagram illustrating an example of calculating the positions of workers or other workers using triangulation in the worker safety management server in FIG. 1.
Figure 7 is a diagram explaining a worker safety management method according to an embodiment of the present invention.

Below, with reference to the attached drawings, embodiments of the present invention will be described in detail so that those skilled in the art can easily implement the present invention. However, since the description of the present invention is only an example for structural and functional explanation, the scope of the present invention should not be construed as limited by the examples described in the text. In other words, since the embodiments can be modified in various ways and can take various forms, the scope of rights of the present invention should be understood to include equivalents that can realize the technical idea. In addition, the purpose or effect presented in the present invention does not mean that a specific embodiment must include all or only such effects, so the scope of the present invention should not be understood as limited thereby.

The meaning of terms described in the present invention should be understood as follows.

Terms such as “first” and “second” are used to distinguish one component from another component, and the scope of rights should not be limited by these terms. For example, a first component may be named a second component, and similarly, the second component may also be named a first component. When a component is referred to as being “connected” to another component, it should be understood that it may be directly connected to the other component, but that other components may also exist in between. On the other hand, when a component is referred to as being “directly connected” to another component, it should be understood that there are no other components in between. Meanwhile, other expressions that describe the relationship between components, such as "between" and "immediately between" or "neighboring" and "directly neighboring" should be interpreted similarly.

Singular expressions should be understood to include plural expressions, unless the context clearly indicates otherwise, and terms such as “comprise” or “have” refer to the specified features, numbers, steps, operations, components, parts, or them. It is intended to specify the existence of a combination, and should be understood as not excluding in advance the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

All terms used herein, unless otherwise defined, have the same meaning as commonly understood by a person of ordinary skill in the field to which the present invention pertains. Terms defined in commonly used dictionaries should be interpreted as consistent with the meaning they have in the context of the related technology, and cannot be interpreted as having an ideal or excessively formal meaning unless clearly defined in the present invention.

Now, the worker safety management system and method according to an embodiment of the present invention will be described in detail with reference to the drawings.

Figure 1 is a diagram illustrating a worker safety management system according to an embodiment of the present invention, Figure 2 is a diagram showing an example of a simulation of the movement path of a worker or other workers in the worker safety management server in Figure 1, and Figure 3 is a diagram showing an example. It is a diagram showing an example of signal strength or other signal strengths in the worker safety management server in Figure 1, Figure 4 is a diagram showing an example of signal strength data distribution analysis in the worker safety management server in Figure 1, and Figure 5 is Figure 1 This is a diagram showing an example of the location confirmation module structure in the worker safety management server in FIG. 6 , and FIG. 6 is a diagram showing an example of calculating the positions of workers or other workers using triangulation in the worker safety management server in FIG. 1 .

1 to 6, the worker safety management system 100 includes a plurality of worker terminals 110, a plurality of wireless LAN support devices 120, a worker safety management server 130, a database 140, and a network ( 150).

The worker terminal 110 generates a location notification signal to notify the worker's location and transmits it, including worker identification information, to the wireless LAN support device 120, or other workers transmitted from another worker terminal 110. It receives other location notification signals containing identification information, measures the strength of other signals, and transmits them to the wireless LAN support device 120 along with worker identification information.

In one embodiment, the worker terminal 110 may be an item moved with the worker (e.g., work object, etc.), something the worker wears, a wireless mobile communication device carried by the worker, etc., mounted on the worker's work tool, etc. You can.

In one embodiment, the worker terminal 110 generates an app download request signal and transmits it through the wireless LAN support device 120 or directly to the worker safety management server 130, and then sends it to the worker safety management server 130. You can download the transmitted worker safety management app (or program) and save it in the internal memory, and then when you run the worker safety management app (or program), a location notification signal is generated and worker identification information is included. and transmits it to the wireless LAN support device 120, or receives other location notification signals containing other worker identification information transmitted from another worker terminal 110, measures the strength of other signals, and includes worker identification information to support wireless LAN. It can be transmitted to the device 120.

In one embodiment, the worker terminal 110 is equipped with a real time locating system (RTLS) communication module, an ultra wide band (UWB) communication module, a WiFi communication module, a Bluetooth communication module, a Zigbee communication module, etc. It may be equipped with at least one or more of the same wireless communication modules, and performs a wireless communication connection with another worker terminal 110 using the corresponding wireless communication module, and other worker identification information transmitted from the other worker terminal 110 It is possible to measure the strength of other signals by receiving other location notification signals, and also perform a wireless communication connection with the wireless LAN support device 120 using the corresponding wireless communication module to generate a location notification signal and provide worker identification information. It can be transmitted to the wireless LAN support device 120, and a location notification signal including other worker identification information, other signal strength, and worker identification information can be generated and transmitted to the wireless LAN support device 120. At this time, the worker terminal 110 may be separately equipped with a measurement module for measuring the strength of another location notification signal including other worker identification information (i.e., other signal strength).

In one embodiment, the worker terminal 110, especially in the case of a UWB communication module, measures the strength of another location notification signal including other worker identification information received from another worker terminal 110 using the corresponding UWB communication module. It is possible to obtain an accurate rudder operator position with an error of 10 to 30 cm depending on the measured rudder signal strength.

In one embodiment, the worker terminal 110 transmits its own unique signal that can be transmitted even when the wireless communication module is turned off, that is, a signal indicating its own location to a wireless base station containing a terminal unique identifier, and a wireless At least one or more unique signals among a signal for base station allocation and a signal for call connection with a wireless base station can be transmitted as a location notification signal.

In one embodiment, the worker terminal 110 transmits a unique signal including a unique terminal identifier, or receives a unique signal including a unique identifier of another terminal transmitted from another worker terminal 110 and measures the strength of the other signal. Thus, the unique identifier of another terminal and the strength of another signal may be included in the unique signal including the unique identifier of the terminal and transmitted.

In one embodiment, the worker terminal 110 receives a risk notification message (which may include distance information between the worker or other workers and the risk area) transmitted from the wireless LAN support device 120 and sends a risk notification message such as a speaker, display, etc. Warnings about dangerous areas can be notified through output means.

In one embodiment, the worker terminal 110 includes a gyro sensor to detect rapid movement of the terminal, a shock detection sensor to detect whether an impact has occurred in the terminal, and a captured image that captures the situation surrounding the terminal and creates a dangerous situation image. It can be equipped with a dangerous situation recognition module using a camera to check recognition, and the corresponding gyro sensor, corresponding impact detection sensor, and corresponding hazardous situation recognition module can be used to ensure that the worker or other workers perform work in a hazardous area. In some cases, it is possible to detect when an accident occurs to a worker due to an unexpected unexpected situation, etc., and the occurrence of the detected accident can be notified to the wireless LAN support device 120.

The wireless LAN support device 120 is fixedly installed in a shaded area of a construction site, receives a location notification signal containing worker identification information transmitted from the worker terminal 110, measures the signal strength, and includes device identification information to connect to the network. It is transmitted to the worker safety management server 130 through (150), or other location notification signals including other worker identification information, other signal strength, and worker identification information transmitted from the worker terminal 110 are received and include device identification information. and transmits it to the worker safety management server 130 through the network 150.

In one embodiment, the wireless LAN support device 120 may receive an app download request signal transmitted from the worker terminal 110 and transmit it to the worker safety management server 130, and the worker safety management server 130 The worker safety management app (or program) transmitted from can be received and transmitted to the worker terminal 110.

In one embodiment, the wireless LAN support device 120 may be a wireless terminal that supports wireless LAN or a wireless terminal capable of a hotspot, and may be an RTLS communication module, UWB communication module, RF communication module, WiFi communication module, or Bluetooth communication. It may be equipped with at least one or more wireless communication modules such as a module, ZigBee communication module, etc., and uses the wireless communication module to receive a location notification signal containing worker identification information transmitted from the worker terminal 110 and check the signal strength. Measurements can be made, and other location notification signals including other worker identification information, other signal strengths, and worker identification information transmitted from the worker terminal 110 can be received using the corresponding wireless communication module. At this time, the wireless LAN support device 120 may be separately equipped with a measurement module for measuring the strength (i.e., signal strength) of the location notification signal including worker identification information.

In one embodiment, the wireless LAN support device 120 can measure the strength of a location notification signal containing worker identification information received from the worker terminal 110 using the corresponding UWB communication module, especially in the case of a UWB communication module. And, depending on the measured signal strength, it is possible to obtain an accurate worker position with an error of 10 to 30 cm.

In one embodiment, the wireless LAN support device 120 receives a time synchronization signal transmitted from the worker safety management server 130, sets the time in response to the received time synchronization signal, and sets the time in response to the other wireless LAN support device 120. ) can perform time synchronization.

In one embodiment, the wireless LAN support device 120 can perform a wireless communication connection between each other (i.e., a master-slave communication connection), and the master side generates a time synchronization signal to synchronize the time and sends the signal to the slave side. It can be transmitted, and the slave side can set the time in response to the received time synchronization signal to perform time synchronization between them.

In one embodiment, the wireless LAN support device 120 may receive a risk notification message transmitted from the worker safety management server 130 and transmit it to the worker terminal 110.

In one embodiment, the wireless LAN support device 120 may receive an accident notification from the worker terminal 110 and notify the worker safety management server 130 of the occurrence of an accident.

In one embodiment, the wireless LAN support device 120 has a battery to supply the necessary power to the device in a detachable form from the main body case, so that it can be installed anywhere in the shaded area of the construction site without wiring a separate power supply line. It allows you to freely install and retrieve it at any time.

In one embodiment, when the wireless LAN support device 120 is formed as an independent device equipped with a battery, the worker safety management server 130 checks the state of the battery (i.e., charging state, etc.) and available time. You may also be notified by .

The worker safety management server 130 receives a location notification signal including worker identification information, signal strength, and device identification information transmitted through the network 150 from the wireless LAN support device 120, or receives a location notification signal from the wireless LAN support device 120. Receives other location notification signals including other worker identification information, other signal strengths, worker identification information, and device identification information transmitted through the network 150, and stores the signal strength or distance information corresponding to the other signal strengths in the database 140. The distance information read is used to determine the location of the worker or other workers to manage the safety of the worker or other workers.

In one embodiment, the worker safety management server 130 receives an app download request signal transmitted directly from the wireless LAN support device 120 or the worker terminal 110 and installs a worker safety management app (or program). It can be read from the database 140 and transmitted directly to the wireless LAN support device 120 or the worker terminal 110.

In one embodiment, the worker safety management server 130 determines the location of the worker or other worker using the distance information read from the database 140, collects the location of the determined worker or other worker, and collects the location of the worker or other worker. The movement of the worker or other workers can be tracked, and the movement path of the traced worker or other workers can be stored in the database 140 by worker identification information or other worker identification information to manage the safety of the worker or other workers.

In one embodiment, the worker safety management server 130 may be equipped with a 5GHz distance measurement software platform, and may be configured to measure the signal strength received from the wireless LAN support device 120 using the distance measurement software platform. By collecting the signal strength, the location of the worker or other workers can be determined and the movement of the worker or other workers can be tracked. For example, assuming that there is a simulation of the movement path of the worker or other workers as shown in Figure 2. , it is possible to obtain signal strength or other signal strengths according to the movement of workers or other workers as shown in the graph of FIG. 3, and also collect data on signal strength or other signal strengths as shown in the graph of FIG. 4. Likewise, the actual location of the worker or other workers can be determined through scatter plot analysis of signal strength data, and at this time, secondary measurement and complementary algorithms are performed through the wireless LAN support device 120 to provide more accurate location information of the worker or other workers. It may also return .

In one embodiment, the worker safety management server 130 may form a positioning module structure to confirm the position of the worker or other workers as shown in FIG. 5, where the positioning module uses time difference (TDOA) of alive may include a location engine (131), a reader interface (132), and a data queue (133).

The TDOA location engine 131 uses a distance measurement method using TDOA to connect between the worker terminal 110 or between the worker terminal 110 and the wireless LAN support device according to the reception event (Rcv_Event) notified from the reader interface 132. By measuring the time difference between signals (120) and converting the measured time difference into a distance, the location of the worker or other workers can be estimated, and the estimated location information (Loc_Info) can be sent to the reader interface (132). After delivering the information to the data queue 133, the location of the worker or other workers can be tracked by receiving the information list (Info_List). At this time, the TDOA location engine 131 can calculate the location of the worker or other workers using points where the signal transmission time difference between the worker terminal 110 or between the worker terminal 110 and the wireless LAN support device 120 is constant. there is.

In one embodiment, the TDOA location engine 131 may calculate the location of the worker or other workers using the triangulation method as shown in FIG. 6.

The reader interface 132 receives a signal transmitted from the wireless LAN support device 120, notifies the TDOA location engine 131 of the reception event (Rcv_Event), and then receives location information (Loc_Info) from the TDOA location engine 131. ) can be received and stored in the data queue 133 as input queue information (In_Queue).

The data queue 133 sequentially registers the input queue information (In_Queue) transmitted from the reader interface 132, and sends an information list (Info_List) for the registered input queue information (In_Queue) to the TDOA location engine 131. It can be delivered by .

In one embodiment, the worker safety management server 130 may perform time synchronization between the wireless LAN support devices 120, where the location of the worker or other workers is confirmed using a distance measurement method using TDOA. In order to have accuracy within a preset error range (e.g., 0.1 to 1m) between the actual location and the determined location, a time synchronization signal for time synchronization is generated at each preset time to enable the wireless LAN support device 120. It can be sent to .

In one embodiment, the worker safety management server 130 uses a distance measurement method using TDOA and additionally combines received signal strength indication (RSSI) to minimize temporal errors that may occur in a multipath path. You can use it to select the strongest signal among the multipath signals and then determine the location of the worker or other workers.

In one embodiment, the worker safety management server 130 receives a location notification signal including worker identification information, signal strength, and device identification information transmitted from the wireless LAN support device 120 while tracking the movement path of the worker or other workers. B. If the location of the worker or other workers cannot be confirmed due to the inability to receive other location notification signals, including other worker identification information, other signal strength, worker identification information, and device identification information, the location where the movement path was finally traced is located. A device installation command for additional installation of the wireless LAN support device 120 can be generated and notified to the manager or operator through the network 150, and construction can be completed through the additional installation of the wireless LAN support device 120. It allows you to more accurately check the location of workers or other workers in the entire shaded area of the site.

In one embodiment, the worker safety management server 130 compares the location of the worker or other workers with the dangerous area location information registered in the database 140, and calculates the distance between the worker or other workers and the dangerous area, Supports wireless LAN by checking whether the calculated distance is a safe distance, normal distance, or dangerous distance registered in the database 140 and generating a risk notification message (which may include distance information between the worker or other workers and the dangerous area). It can be transmitted to the device 120.

In one embodiment, when a worker or another worker approaches a hazardous area, the worker safety management server 130 determines whether the worker or other worker approaching the hazardous area is an accessible worker registered in the database 140. After confirmation, if the worker or another worker is not an accessible worker, a risk notification message can be generated and transmitted to the wireless LAN support device 120.

In one embodiment, the worker safety management server 130 may receive an accident notification from the wireless LAN support device 120 and notify the manager or operator through the network 150.

In one embodiment, the worker safety management server 130 receives the battery status (i.e., charging status, etc.) or available time notified from the wireless LAN support device 120, and receives the received battery status ( That is, when the charging state, etc.) or available time reaches a preset limit, the manager or operator may be notified of battery replacement through the network 150.

The database 140 sets and registers distance information corresponding to signal strength or other signal strengths in advance.

In one embodiment, the database 140 may preset and register distance information corresponding to other signal strengths for each worker identification information in a database, and may also preset distance information corresponding to signal strengths for each device identification information. You can set it up and register it in a database.

In one embodiment, the database 140 maps the installation location data of the wireless LAN support device 120 to the location data of the shaded area of the construction site in order to more accurately determine the location of the worker or other workers. , it allows the location of the worker or other workers to be confirmed in response to the location of the shaded area at the construction site.

In one embodiment, the database 140 may preset and register a worker safety management app (or program) to manage worker safety by more accurately confirming the location of the worker or other workers.

In one embodiment, the database 140 may register the movement paths of workers or other workers transmitted from the worker safety management server 130 into a database by worker identification information or other worker identification information.

In one embodiment, the database 140 contains information related to the worker terminal 110 (e.g., worker identification information, terminal unique identifier, worker information, worker work information, etc.), and information related to the wireless LAN support device 120. Information (e.g., device identification information, installation location information, etc.) and location data of shaded areas at construction sites can be set in advance and registered in a database.

In one embodiment, the database 140 may pre-set location information on dangerous areas among the shaded areas of the construction site and register them in a database in order to ensure safety from industrial accidents at construction sites. Depending on the distance, you can preset and register it as a safe distance, normal distance, or dangerous distance.

In one embodiment, the database 140 may preset and register information on workers who can access the hazardous area (i.e., information on workers who can access the hazardous area).

The network 150 is provided with a wired communication network or a wireless communication network and supports communication between a plurality of worker terminals 110, communication between a plurality of wireless LAN support devices 120, and a plurality of worker terminals 110 and a plurality of wireless LANs. By connecting communication between devices 120 and communication between a plurality of wireless LAN support devices 120 and the worker safety management server 130, data between a plurality of worker terminals 110 and a plurality of wireless LAN support devices 120 are connected. It transmits and receives data between, data between a plurality of worker terminals 110 and a plurality of wireless LAN support devices 120, and data between a plurality of wireless LAN support devices 120 and the worker safety management server 130.

The worker safety management system 100 having the above-described configuration more accurately confirms the worker's location through communication linkage between the wireless LAN support device and the worker terminal and the worker terminal in the shaded area of the construction site. By implementing safety management, the location of workers can be confirmed more accurately even if fewer wireless LAN support devices are installed in shaded areas of the construction site, making installation and operating costs lower.

The worker safety management system 100 having the above-described configuration can more accurately determine the worker's location in real time through communication linkage between the wireless LAN support device and the worker terminal in the shaded area of the construction site and communication linkage between the worker terminals. By implementing this, even if an accident occurs due to an unexpected situation occurring when a worker approaches a dangerous area in a shaded area or performs work in a dangerous area, the worker or construction site manager can be notified immediately. , In addition, even if such an accident occurs or work time is delayed and the work time agreed between the construction site manager and worker is exceeded, not only can a safe distance be secured between the worker and the hazardous area, but additional accidents can also occur as a result. This can be prevented from occurring, making comprehensive management easy from the outside, and also making it easier to communicate internally between workers, identify their location, and respond to risks.

Figure 7 is a diagram explaining a worker safety management method according to an embodiment of the present invention.

Referring to FIG. 7, the database 140 pre-registers distance information corresponding to signal strength or other signal strength (S701).

In registering the distance information in the above-described step S701, in the database 140, distance information corresponding to other signal strengths can be set in advance for each worker identification information and registered in a database, and can be registered for each device identification information. Distance information corresponding to signal strength can be set in advance and registered in a database.

In registering the distance information in the above-described step S701, the database 140 maps the installation location data of the wireless LAN support device 120 to the shadow area location data of the construction site, so that workers or other workers By allowing the location of the to be confirmed in response to the location of the shaded area at the construction site, the location of the worker or other workers can be determined more accurately.

In registering the distance information in the above-described step S701, the database 140 pre-installs a worker safety management app (or program) to manage the safety of the worker by more accurately confirming the location of the worker or other workers. You can set it up and register it.

In registering the distance information in step S701 described above, the database 140 stores information related to the worker terminal 110 (e.g., worker identification information, terminal unique identifier, worker information, worker task information, etc.), Information related to the wireless LAN support device 120 (e.g., device identification information, installation location information, etc.) and shadow area location data information at the construction site can be set in advance and registered in a database.

In registering the distance information in the above-described step S701, in the database 140, in order to ensure safety from industrial accidents at the construction site, location information on dangerous areas among the shaded areas of the construction site is set in advance and registered in a database. Depending on the distance from the dangerous area, you can set and register them in advance as safe distance, normal distance, or dangerous distance.

When registering distance information in step S701 described above, information on workers who can access the dangerous area (i.e., information on workers who can access the area) may be set and registered in advance in the database 140.

After registering the distance information in the above-described step S701, the worker terminal 110 generates a location notification signal to notify the worker's location and transmits it to the wireless LAN support device 120 including the worker identification information. Alternatively, a location notification signal containing other worker identification information transmitted from another worker terminal 110 is received, the strength of the other signal is measured, and the worker identification information is included and transmitted to the wireless LAN support device 120 (S702) ).

In transmitting a location notification signal including worker identification information or another location notification signal including other worker identification information, other signal strength, and worker identification information in step S702 described above, items moved with the worker (e.g., work object) etc.), the worker terminal 110, which may be mounted on the worker's wear, the worker's work tools, etc., or a wireless mobile communication device carried by the worker, generates an app download request signal and passes it through the wireless LAN support device 120. Alternatively, it can be transmitted directly to the worker safety management server 130. Accordingly, the wireless LAN support device 120 can receive the app download request signal transmitted from the worker terminal 110 and transmit it to the worker safety management server 130. Accordingly, the worker safety management server 130 receives an app download request signal transmitted directly from the wireless LAN support device 120 or the worker terminal 110, and stores the worker safety management app (or program) in the database ( 140) can be read and transmitted directly to the wireless LAN support device 120 or the worker terminal 110. And the wireless LAN support device 120 can receive the worker safety management app (or program) transmitted from the worker safety management server 130 and transmit it to the worker terminal 110. Then, the worker terminal 110 can download the worker safety management app (or program) transmitted from the worker safety management server 130 and store it in the internal memory.

In the case of executing a worker safety management app (or program) in transmitting a location notification signal including worker identification information or other location notification signals including other worker identification information, other signal strength, and worker identification information in step S702 described above. In the worker terminal 110, a location notification signal is generated and transmitted to the wireless LAN support device 120 including worker identification information, or a location notification signal including other worker identification information transmitted from another worker terminal 110 is sent. It is possible to receive a signal, measure the strength of other signals, include worker identification information, and transmit it to the wireless LAN support device 120.

In transmitting a location notification signal including worker identification information or another location notification signal including other worker identification information, other signal strength, and worker identification information in step S702 described above, an RTLS (real time locating system) communication module, or UWB ( In the worker terminal 110 equipped with at least one or more of wireless communication modules such as ultra wide band) communication module, WiFi communication module, Bluetooth communication module, and Zigbee communication module, the corresponding wireless communication module By using a wireless communication connection with another worker terminal 110, you can receive other location notification signals including other worker identification information transmitted from the other worker terminal 110 and measure the strength of other signals, and also measure the strength of other signals. By performing a wireless communication connection with the wireless LAN support device 120 using a communication module, a location notification signal is generated and transmitted to the wireless LAN support device 120 including worker identification information, other worker identification information, and other information. Other location notification signals including signal strength and worker identification information can be generated and transmitted to the wireless LAN support device 120.

In transmitting a location notification signal including worker identification information or another location notification signal including other worker identification information, other signal strength, and worker identification information in step S702 described above, especially in the case of a UWB communication module, the worker terminal 110 In this case, the UWB communication module can be used to measure the strength of other location notification signals including other worker identification information received from other worker terminals 110, and the measured signal strength can be accurately measured to an error level of 10 to 30 cm. You can get another worker's position.

In the above-described step S702, when transmitting a location notification signal including worker identification information or another location notification signal including other worker identification information, other signal strength, and worker identification information, in the worker terminal 110, the wireless communication module is turned off. At least one of the following: a unique signal that can be transmitted even in this state, that is, a signal that announces its own location to a wireless base station containing a unique terminal identifier, a signal for wireless base station allocation, and a signal for call connection with a wireless base station. Or, a more unique signal can be transmitted as a location notification signal.

In the above-described step S702, when transmitting a location notification signal including worker identification information or another location notification signal including other worker identification information, other signal strength, and worker identification information, the worker terminal 110 includes a unique terminal identifier. Transmit a signal, or receive another unique signal including the unique identifier of another terminal transmitted from another worker terminal 110, measure the strength of the other signal, and measure the unique identifier of the other terminal and the strength of the other signal to the unique signal including the terminal unique identifier. You can also include it and send it.

In the above-mentioned step S702, when a location notification signal including worker identification information or another location notification signal including other worker identification information, other signal strength, and worker identification information is transmitted, the wireless LAN support device is fixedly installed in the shaded area of the construction site. At (120), a location notification signal containing worker identification information transmitted from the worker terminal 110 is received, the signal strength is measured, the device identification information is included, and the signal is transmitted to the worker safety management server 130 through the network 150. Or, receive other location notification signals including other worker identification information, other signal strength, and worker identification information transmitted from the worker terminal 110 and include device identification information to the worker safety management server 130 through the network 150. It is transmitted to (S703).

In transmitting a location notification signal including worker identification information, signal strength, and device identification information in the above-described step S703 or another location notification signal including other worker identification information, other signal strength, worker identification information, and device identification information, wireless LAN It may be a wireless terminal that supports or a wireless terminal capable of a hotspot, and may be at least one or more wireless communication modules such as RTLS communication module, UWB communication module, RF communication module, WiFi communication module, Bluetooth communication module, ZigBee communication module, etc. In the wireless LAN support device 120 equipped with a wireless communication module, the signal strength can be measured by receiving a location notification signal containing worker identification information transmitted from the worker terminal 110, and the wireless communication Using the module, it is possible to receive other worker identification information, other signal strength, and other location notification signals including worker identification information transmitted from the worker terminal 110.

In transmitting a location notification signal including worker identification information, signal strength, and device identification information in the above-mentioned step S703 or another location notification signal including other worker identification information, other signal strength, worker identification information, and device identification information, especially UWB In the case of a communication module, the wireless LAN support device 120 can measure the strength of a location notification signal containing worker identification information received from the worker terminal 110 using the corresponding UWB communication module, and the measured signal strength It is possible to obtain an accurate worker position with an error of 10 to 30 cm.

In step S703 described above, when a location notification signal including worker identification information, signal strength, and device identification information or another location notification signal including other worker identification information, other signal strength, worker identification information, and device identification information is transmitted, worker safety is managed. The server 130 receives a location notification signal including worker identification information, signal strength, and device identification information transmitted through the network 150 from the wireless LAN support device 120, or receives a location notification signal from the wireless LAN support device 120 through the network ( Receives other location notification signals including other worker identification information, other signal strength, worker identification information, and device identification information transmitted through 150), and reads the signal strength or distance information corresponding to the other signal strength from the database 140. , the location of the worker or other workers is determined using the read distance information to manage the safety of the worker or other workers (S704).

In managing the safety of the worker or other workers in step S704 described above, the worker safety management server 130 determines the location of the worker or other workers using the distance information read from the database 140 and performs the determined task. By collecting the location of the worker or other worker, the movement of the worker or other worker can be tracked, and the movement path of the tracked worker or other worker is stored in the database 140 according to worker identification information or other worker identification information. The safety of workers can be managed. At this time, in the database 140, the movement path of the worker or other workers transmitted from the worker safety management server 130 can be registered in a database according to worker identification information or other worker identification information.

In managing the safety of the worker or other workers in step S704 described above, the worker safety management server 130 may be equipped with a 5 GHz distance measurement software platform, and using the formed distance measurement software platform, By collecting the signal strength or other signal strengths received from the wireless LAN support device 120, the location of the worker or other workers can be determined and the movement of the worker or other workers can be tracked. For example, as shown in FIG. 2. Assuming that there is a simulation of the movement path of the worker or other workers, the signal strength or other signal strengths according to the movement of the worker or other workers as shown in the graph of FIG. 3 can be obtained, and also the signal strength or other signal strengths can be obtained. By collecting data, the actual location of the worker or other workers can be determined through scatter plot analysis of the signal strength data as shown in the graph of FIG. 4, and at this time, secondary measurement and complementary algorithm through the wireless LAN support device 120 You can also return more accurate location information of the worker or other workers by performing .

In managing the safety of the worker or other workers in the above-described step S704, a positioning module structure for checking the position of the worker or other workers can be formed as shown in FIG. 5, and at this time, the positioning module is TDOA. (time difference of alive) In the worker safety management server 130, which includes a location engine 131, a reader interface 132, and a data queue 133, the reader interface At (132), after receiving a signal transmitted from the wireless LAN support device 120 and notifying the TDOA location engine 131 of the reception event (Rcv_Event), location information (Loc_Info) is received from the TDOA location engine 131. It can be received and stored in the data queue 133 as input queue information (In_Queue).

In managing the safety of the worker or other workers in the above-described step S704, the data queue 133 sequentially registers the input queue information (In_Queue) transmitted from the reader interface 132, and the registered input queue information The information list (Info_List) for (In_Queue) can be transmitted to the TDOA location engine (131). Accordingly, the TDOA location engine 131 uses a distance measurement method using TDOA to determine the distance between the worker terminal 110 or between the worker terminal 110 and the wireless LAN according to the reception event (Rcv_Event) notified from the reader interface 132. By measuring the time difference it takes for the signal to be transmitted between the support devices 120 and converting the measured time difference into a distance, the location of the worker or other workers can be estimated, and the estimated location information (Loc_Info) can be sent to the reader interface ( 132), the information list (Info_List) can be received from the data queue 133 to track the location of the worker or other workers. At this time, the TDOA location engine 131 can calculate the location of the worker or other workers using points where the signal transmission time difference between the worker terminal 110 or between the worker terminal 110 and the wireless LAN support device 120 is constant. there is.

In managing the safety of the worker or other workers in step S704 described above, the TDOA location engine 131 can calculate the positions of the worker or other workers using the triangulation method as shown in FIG. 6.

In managing the safety of the worker or other workers in the above-described step S704, the worker safety management server 130 may perform time synchronization between the wireless LAN support devices 120, and at this time, the distance measurement method using TDOA When checking the location of a worker or other workers using , in order to have accuracy within a preset error range (for example, 0.1 to 1m) between the actual position and the determined position, the time for time synchronization is set at each preset time. A synchronization signal can be generated and transmitted to the wireless LAN support device 120. Accordingly, the wireless LAN support device 120 receives the time synchronization signal transmitted from the worker safety management server 130 and sets the time in response to the received time synchronization signal to match the time with the other wireless LAN support device 120. Synchronization can be performed.

In managing the safety of the worker or other workers in the above-described step S704, the wireless LAN support device 120 can perform wireless communication connection between each other (i.e., master and slave communication connection), and the master side A time synchronization signal for synchronization can be generated and transmitted to the slave side, and the slave side can set the time in response to the received time synchronization signal to perform time synchronization between them.

In managing the safety of the worker or other workers in step S704 described above, the worker safety management server 130 uses a distance measurement method using TDOA to minimize temporal errors that may occur in the multipath path. RSSI (received signal strength indication) can be used in additional reinforcement to determine the location of the worker or other workers after selecting the strongest signal among the multipath signals.

In managing the safety of the worker or other workers in step S704 described above, the worker safety management server 130 uses the worker identification transmitted from the wireless LAN support device 120 while tracking the movement path of the worker or other workers. Location notification signals containing information, signal strength, and device identification information, or other location notification signals containing other worker identification information, other signal strength, worker identification information, and device identification information cannot be received, making it impossible to confirm the location of the worker or other workers. In this case, a device installation command can be generated to additionally install the wireless LAN support device 120 at the location where the final movement path is tracked, and the manager or operator can be notified of this through the network 150. Through the additional installation of the LAN support device 120, it is possible to more accurately check the location of workers or other workers in the entire shaded area of the construction site.

In managing the safety of the worker or other workers in the above-described step S704, the worker safety management server 130 compares the location of the worker or other workers with the dangerous area location information registered in the database 140, and determines the safety of the worker or other workers. You can calculate the distance between other workers and the dangerous area, and check whether the calculated distance is a safe distance, normal distance, or dangerous distance registered in the database 140 to send a risk notification message (distance information between the worker or other workers and the dangerous area). may include) can be generated and transmitted to the wireless LAN support device 120. In addition, in the worker safety management server 130, when a worker or another worker approaches a hazardous area, after checking whether the worker or other worker approaching the hazardous area is an accessible worker registered in the database 140, If the worker or another worker is not an accessible worker, a risk notification message can be generated and transmitted to the wireless LAN support device 120. Accordingly, the wireless LAN support device 120 can receive a risk notification message transmitted from the worker safety management server 130 and transmit it to the worker terminal 110. Then, the worker terminal 110 receives a risk notification message (which may include distance information between the worker or other workers and the risk area) transmitted from the wireless LAN support device 120 and uses an output means such as a speaker or display. It can provide warnings about dangerous areas.

In managing the safety of the worker or other workers in the above-mentioned step S704, a gyro sensor to detect sudden movement of the terminal, a shock detection sensor to detect whether an impact has occurred in the terminal, and The worker terminal 110, which is equipped with a dangerous situation recognition module using a camera to check whether the video is a dangerous situation image, uses the corresponding gyro sensor, the corresponding shock detection sensor, the corresponding dangerous situation recognition module, etc. to recognize the worker or When other workers are performing work in a hazardous area, it is possible to detect when an accident occurs to the worker due to an unexpected situation, etc., and the occurrence of the detected accident can be notified to the wireless LAN support device (120). there is. Accordingly, the wireless LAN support device 120 can receive the occurrence of an accident notified from the worker terminal 110 and notify it to the worker safety management server 130. Then, the worker safety management server 130 can receive the occurrence of an accident notified from the wireless LAN support device 120 and notify the manager or operator through the network 150.

In order to manage the safety of the worker and other workers in the above-mentioned step S704, it can be freely installed and easily recovered anywhere in the shaded area of the construction site at any time even without wiring a separate power supply line. When the battery to supply the necessary power of the device is formed in a detachable form from the main case (i.e., when formed as an independent device equipped with a battery), the wireless LAN support device 120 determines the state of the battery (i.e. Charging status, etc.) or available time can be checked and notified to the worker safety management server 130. Accordingly, the worker safety management server 130 receives the battery status (i.e., charging status, etc.) or usable time notified from the wireless LAN support device 120, and receives the received battery status (i.e., charging status, etc.). When the battery status (state, etc.) or available time reaches a preset limit, the manager or operator may be notified of battery replacement through the network 150.

As mentioned above, the embodiment of the present invention is not implemented only through the above-described device and/or operating method, but through a program for realizing the function corresponding to the configuration of the embodiment of the present invention, a recording medium on which the program is recorded, etc. It may be implemented, and such implementation can be easily implemented by an expert in the technical field to which the present invention belongs based on the description of the embodiments described above. Although the embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements can be made by those skilled in the art using the basic concept of the present invention defined in the following claims. It falls within the scope of rights.

100: Worker Safety Management System
110: operator terminal
120: Wireless LAN supported device
130: Worker safety management server
140: database
150: network

Claims (5)

A database for presetting and registering distance information corresponding to signal strength or other signal strengths; It generates a location notification signal to notify the worker's location and transmits it as a location notification signal containing worker identification information. It also receives other location notification signals containing other worker identification information transmitted from other worker terminals and measures the strength of other signals. A worker terminal for transmitting other worker identification information, other signal strength, and other location notification signals including worker identification information; It is fixedly installed in a shaded area of a construction site, receives a location notification signal containing worker identification information transmitted from the worker terminal, measures the signal strength, and transmits it as a location notification signal containing worker identification information, signal strength, and device identification information, Receive other location notification signals including other worker identification information, other signal strength, and worker identification information transmitted from the worker terminal and transmit them as other location notification signals including other worker identification information, other signal strength, worker identification information, and device identification information. Wireless LAN support device to provide; And receiving a location notification signal including worker identification information, signal strength, and device identification information transmitted from the wireless LAN support device, or another location notification signal including other worker identification information, other signal strength, worker identification information, and device identification information, and receiving a signal. It reads distance information corresponding to the intensity or other signal intensity from the database, and determines the location of the worker or other workers using the read distance information, and includes a worker safety management server to manage the safety of the worker or other workers. ;
The worker terminal generates an app download request signal and transmits it through the wireless LAN support device or to the worker safety management server, then downloads the worker safety management app and stores it in the internal memory; When running the worker safety management app, a location notification signal is generated and transmitted to the wireless LAN support device including worker identification information, and a measurement module is provided to measure the strength of other signals and transmitted from other worker terminals. Receives other location notification signals containing other worker identification information, measures the strength of other signals, includes worker identification information, and transmits them to the wireless LAN support device; A gyro sensor to detect rapid movement of the terminal, a shock detection sensor to detect whether an impact has occurred in the terminal, and a dangerous situation recognition module using a camera to capture the situation around the terminal and check whether the captured image is a dangerous situation image. Equipped with at least one or more of the following, detects when an accident occurs to the worker due to an unexpected situation when the worker or another worker performs work in a hazardous area, and supports the wireless LAN for the occurrence of the detected accident. A worker safety management system characterized by notification through a device.
delete delete The method of claim 1, wherein the worker terminal,
A worker safety management system comprising at least one or more wireless communication modules among an RTLS communication module, UWB communication module, WiFi communication module, Bluetooth communication module, and Zigbee communication module.
A database presetting and registering distance information corresponding to signal strength or other signal strength; Generates a location notification signal for the worker terminal to notify the worker's location and transmits it as a location notification signal containing worker identification information, and receives other location notification signals containing other worker identification information transmitted from other worker terminals to strengthen other signals. Measuring and transmitting as another location notification signal including other worker identification information, other signal strength, and worker identification information; A wireless LAN support device fixedly installed in a shaded area of a construction site receives a location notification signal containing worker identification information transmitted from the worker terminal, measures the signal strength, and transmits a location notification signal containing worker identification information, signal strength, and device identification information. Receives other location notification signals including other worker identification information, other signal strength, and worker identification information transmitted from the worker terminal, and receives other location notification signals including other worker identification information, other signal strength, worker identification information, and device identification information. Step of transmitting to; And a location notification signal containing worker identification information, signal strength, and device identification information transmitted by the worker safety management server from the wireless LAN support device, or another location notification signal containing other worker identification information, other signal strength, worker identification information, and device identification information. It includes the step of receiving, reading distance information corresponding to signal strength or other signal strength from the database, and using the read distance information to determine the location of the worker or other workers to manage the safety of the worker or other workers. and;
The worker terminal generates an app download request signal and transmits it through the wireless LAN support device or to the worker safety management server, then downloads the worker safety management app and stores it in the internal memory; When running the worker safety management app, a location notification signal is generated and transmitted to the wireless LAN support device including worker identification information, and a measurement module is provided to measure the strength of other signals and transmitted from other worker terminals. Receives other location notification signals containing other worker identification information, measures the strength of other signals, includes worker identification information, and transmits them to the wireless LAN support device; A gyro sensor to detect rapid movement of the terminal, a shock detection sensor to detect whether an impact has occurred in the terminal, and a dangerous situation recognition module using a camera to capture the situation around the terminal and check whether the captured image is a dangerous situation image. Equipped with at least one or more of the following, detects when an accident occurs to the worker due to an unexpected situation when the worker or another worker performs work in a hazardous area, and supports the wireless LAN for the occurrence of the detected accident. A worker safety management method characterized by notification through a device .