KR20190040605A - LPWA network based worker hazard detection system - Google Patents

Abstract

The present invention relates to a low power wide area (LPWA) network-based worker hazard detection system capable of sending a relief signal to a control server through the LPWA network so that the worker can be aware of a situation when it is determined that a hazard situation is likely to occur or an occurrence possibility of the hazard situation is high by using various sensors that can measure environmental factors around the worker, and an LPWA network, and sending a request signal to the control server to prevent accidents or to take prompt action if necessary.

Description

[0001] The present invention relates to a LPWA communication based worker hazard detection system,

[0001] The present invention relates to a risk sensing device in a form that can be worn by workers at various work sites, and more particularly, to various sensors and low power wide area (LPWA) If it is determined that the risk situation is likely to occur or is likely to occur, the operator is notified of the occurrence of the dangerous situation, and at the same time, a relief signal is transmitted to the control server through the LPWA communication so that a response can be made. And a LPWA communication-based worker risk detection system that helps prevent or prompt action.

Generally, in heavy industrial sites such as large construction sites, shipyards, etc., various work processes are carried out simultaneously through numerous workers, so systematic and effective manpower management, operation and safety management are required for each process.

However, in these work sites, not only the risks arising from the various environments in the field but also the human resources frequently caused by carelessness or insecurity of managers and workers are frequently occurring, and these accidents often lead to a loss of valuable human resources have.

Particularly, in a large-sized worksite, workers in various fields are arranged in subcontracting manner to perform their respective tasks. In the area where the number of managers is relatively small compared to the number of such workers, There is a blind spot in safety management.

Especially, in case of accident, such as falling, evangelism, stenosis or suffocation, when there is no consciousness or an emergency can not be requested, it takes a considerable time to respond to the accident without supervision or manager. There is a problem, and there is a case where the exposure to various harmful substances repeated and cumulative is delayed or the life span is shortened due to exposure to a single disease although there is no recognition or health abnormality due to a single exposure.

This type of accident is not only unfortunate for the person and the family but also causes economic loss in the industry as a whole. Therefore, it is necessary to prevent the accidents and hazardous materials from being exposed at the industrial site and to take measures for prompt action Is required.

Published Patent Application No. 10-2012-0096977 (2012.09.03) Japanese Patent Application Laid-Open No. 10-1079343 (Oct. 27, 2011)

The present invention has been proposed in view of solving the problem that a worker is easily exposed to a risk factor in the conventional industrial field as described above. The present invention detects a dangerous element during worker's work and notifies the worker, And to provide a risk detection unit capable of sending an emergency structure to the control server.

In order to achieve the above object, according to the present invention, there is provided a low power wide area communication (LPWA) communication-based worker's risk detection system comprising: a fixing unit for fixing a worker's body, clothing, A determination unit for determining a dangerous state by comparing a measured value of the collecting unit with a set reference value; a first communication unit that communicates with at least one external device through the LPWA, transmits a determination result of the determination unit, And an interface unit for transmitting an emergency structure request from the operator through the first communication unit and outputting a result of the determination of the dangerous state of the determination unit; A second communication unit for communicating with the first communication unit; a control server having a status propagation unit for transmitting the received determination result or the emergency response request to a designated terminal; .

In this case, the danger detection unit may further include a camera for photographing the surroundings of the operator, and a microphone for receiving sound of the operator and the surroundings, wherein the first communication unit transmits the photographed image of the camera and the microphone input sound to the control server Lt; / RTI >

A first antenna unit that communicates with the first communication unit and converts the received wireless signal into a wired signal, a second antenna unit that converts the wired signal into a wireless signal and communicates with the second communication unit, A first antenna unit connected to the first antenna unit and a second antenna unit connected to the second antenna unit, and a cable for transmitting a wire signal, and a housing for housing the cable; As shown in FIG.

The sensor module includes a temperature sensor module, an oxygen sensor module, a carbon monoxide sensor module, a nitric oxide sensor module, a sulfur oxide sensor module, a combustible gas sensor module, a radiation dose sensor module, Module, and can be configured so that the selected sensor module can be used in combination.

The control server may further include a module management unit for inputting a work schedule for each worker, presenting a sensor module according to a job schedule, determining whether the collection unit is configured through a combination of the sensor modules, and notifying through the interface unit.

A second through hole having a filter and a first suction fan on one side and a second through hole having a filter and a second suction fan on the other side; And a control unit selectively driving the second suction fan to reflect the driving load of the second suction fan, wherein the cover is exposed to the outside of the cover; As shown in FIG.

Through the present invention, it is possible to check the surrounding environment value of the worker in various work sites in real time and check whether it is included in a safe range of values set in advance. When the risk situation is determined, the worker and the central control center are notified promptly, And the worker can judge himself / herself as a dangerous situation and activate the urgent rescue request section to send an emergency rescue signal to the control center, so that a prompt rescue can be expected.

1 is a conceptual diagram of the present invention,
2 is a block diagram illustrating a configuration and a connection relationship according to an embodiment of the present invention;
3 is a block diagram illustrating a configuration and a connection relationship according to the second embodiment of the present invention;
4 is a use state diagram illustrating a relay unit according to the second embodiment of the present invention.
5 is a perspective view showing the structure of a cover according to the third embodiment of the present invention,
6 is a cross-sectional view showing the structure of a cover according to a third embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a configuration of an LPWA communication-based worker risk monitoring system according to the present invention will be described in detail with reference to the accompanying drawings. The detailed description to be read in conjunction with the appended drawings is intended to illustrate exemplary embodiments of the invention and is not intended to represent the only embodiments in which the invention may be practiced.

It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are not to be construed as limiting the invention as defined by the appended claims. do.

In some instances, well-known structures and devices may be omitted or may be shown in block diagram form around the core functionality of each structure and device to avoid obscuring the concepts of the present invention. In the following description, the same components are denoted by the same reference numerals throughout the specification.

Throughout the specification, when an element is referred to as including an element, it is meant to include other elements, not to exclude other elements, unless specifically excluded.

In addition, the term " to " in the description means a unit for processing at least one function or operation, which may be implemented by hardware, software, or a combination of hardware and software. Further, the terms "a", "an", "an" and similar terms include both singular and plural, unless the context clearly dictates otherwise in the context of describing the invention Can be used to mean.

In addition, specific terms used in embodiments of the present invention are provided to facilitate understanding of the present invention. Unless otherwise defined, all terms used herein, including technical and scientific terms, Has the same meaning as commonly understood by those of ordinary skill in the art. The use of such a specific term may be changed to other forms without departing from the spirit of the present invention.

FIG. 1 is a conceptual diagram of the present invention. FIG. 2 is a block diagram illustrating a configuration and a connection relationship according to an embodiment of the present invention. The present invention basically comprises a risk sensing unit 1 A control server 2 for collecting and managing a danger detection signal transmitted from the danger detection unit 1 and supporting a rapid response by propagating a dangerous situation and a terminal 3 receiving a dangerous situation .

Particularly, in the present invention, the communication between the plurality of risk sensing units 1 and the control server 2 is performed through low-power wide-area (LPWA). This is one of the technologies used in the Internet (IoT) field. It has advantages such as low power consumption, low-cost terminal, low construction cost, stable coverage and large-scale terminal access, Management, and supervision functions.

The risk sensing unit 1 is provided with a fixing unit 11 for fixing a worker's body, clothing, or a tool to a worker. The risk can be predicted by electronically measuring a risk factor The determination unit 13, the first communication unit 14, and the interface unit 15 in the configuration for determining whether or not the user has access to the network.

The fixing part 11 may be formed in various forms according to the wearing position. For example, the fixing part 11 may be in the form of a belt to be worn on a safety monitor or body of a worker, or a clip to be worn on a waistband or clothes, Can be worn. In the present invention, since the camera 16 and the microphone 17 may be provided as in the embodiment described later, it is preferable that the camera 16 is installed in the helmet, but the present invention is not limited thereto.

The sensor module senses various physical values or positions or states of the operator, which may act as a risk factor around the operator, To generate a digital sensing signal.

In the present invention, the sensor module includes a temperature sensor module 121, an oxygen sensor module 122, a carbon monoxide sensor module 123, a nitrate sensor module 124, a sulfur oxide sensor module 125, And a GPS module 129. The sensor modules 126 are installed in a state where the various sensor modules are individually provided, Or may be used in a state in which all the sensor modules are simultaneously provided, if necessary.

However, since the type of the required sensor module is different according to the contents of work performed by the operator, and the size of the danger sensing part 1 is increased due to the provision of the sensor module, the portability is lowered. A method of selecting a sensor module and mounting the sensor module to the risk sensing unit 1 is shown as a preferred embodiment.

The temperature sensor module 121 measures the temperature around the worker, so that it is possible to detect the occurrence of heat stroke in the summer as well as a decrease in physical strength due to a long-time work in a high temperature working environment.

In addition, the oxygen sensor module 122 is a sensor for measuring oxygen concentration in the atmosphere, and can detect a danger such as a shock due to a decrease in oxygen concentration, such as a closed space such as a tank or a compartment, Prevent

The carbon monoxide sensor module 123 is a sensor for measuring the concentration of carbon dioxide gas present in the adjacent air. The sensor measures the concentration of carbon dioxide in an optical non-dispersive infrared (NDIR) There is a method of chemically measuring the carbon dioxide concentration. Such a carbon monoxide concentration measurement can prevent the operator from suffocating

In addition, nitrogen oxides sensor modules 124, nitrogen monoxide (NO), nitrogen dioxide (NO _2), diantimony nitrogen (N ₂ O ₃₎ and a sensor for measuring nitrogen oxide in the air adjacent the like nitrous oxide (N ₂ O) A method using a balanced potential, a method using an electric current, a method using a conversion cell for converting a nitrogen oxide gas into a different gas form, and a method using an oxygen ion conductive solid electrolyte and an electrical signal. Similarly, through the sulfuric acid sensor module 125 and the radiation amount sensor module 127, the exposure level and time of sulfur oxides and radiation, which are substances harmful to the human body, are detected and managed to manage the health condition of the worker do.

In addition, the combustible gas sensor module 126 is a sensor capable of measuring a gas having an explosion hazard such as H ₂ , CH _4, and can detect a fire or an explosion possibility in a work environment.

The acceleration sensor module 128 is a device that converts an acceleration change in one direction into an electric signal. The acceleration sensor module 128 is widely used in conjunction with the development of MEMS (micro-electromechanical systems) technology, and a gravity sensor . The sudden change of the measurement value of the acceleration sensor module can predict the posture stability not only for the operator's fall or shock, but also for the work of the elevation.

The GPS module 129 receives position information from a plurality of GPS satellites and can use the information to perform an operator's current position measurement. The position information of the operator can be checked in real time in the control server 2 to quickly ascertain the position of the worker in the event of an accident and the expected location of the accident can be easily grasped even if the power of the risk sensing unit 1 is turned off.

The collecting unit 12 may include a skin temperature measuring sensor module, a skin resistance measuring sensor module, an electrocardiogram sensor module, an ultraviolet ray (UV) sensor module, a body oxygen measuring sensor module, a motion sensor module, A sensor module, and a proximity sensor module.

The determination unit 13 is configured to determine a dangerous state by comparing the measured value of the collection unit with a preset reference value. The determination unit 13 determines whether the operator is in a dangerous state based on the criteria stored in the memory or the criterion input from the worker . That is, the risk factors of the operator are determined based on various criteria set for each sensor module.

The first communication unit 14 is configured to communicate with one or more external devices via LPWA, transmit a determination result of the determination unit, and receive a control signal. The Low Power Wide Area (LPWA) communication module used is a communication standard for building a low-power wide area network. It is based on Sigfox ETSI, LoRa Alliance Ingenu's On-Ramp Wireless, and IEEE 802.15 standard. All of them use the frequency band of license-exempt Sub Ghz band and can communicate up to 21km when the visible distance is secured. The long battery life and relatively low data transmission / reception speed make it possible to use Bluetooth, Zigbee, It is more suitable than wifi.

Basically, the risk sensing unit 1 communicates with the control server 2 through the first communication unit 14 and transmits and receives a radio signal. At this time, the wireless signal may include measurement data measured in the danger detection unit 1, a voice signal, a video call signal, or various types of data according to transmission / reception of a text / multimedia message.

The interface unit 15 receives a request for an emergency structure from the operator, transmits the emergency structure through the first communication unit 14, and outputs a result of the determination of the dangerous state of the determination unit 13. In response to the urgent structure request, A display portion as an output device, an acoustic output portion, and a vibration portion.

The emergency rescue request unit is configured at one end of the danger detection unit and converts an operation such as a touch or a switch operation into an electrical signal to convert an urgent rescue request request of the operator into a signal.

The output device may be configured to output an audio signal, a video signal, or an alarm signal so that the operator can easily recognize the information, and may display and output information processed by the risk sensing unit 1 through the display unit. For example, when the risk sensing unit 1 is in normal operation, a UI (User Interface) or a GUI (Graphic User Interface) associated therewith is displayed. If the risk sensing unit 1 senses a danger and determines that it is in an emergency, And displays a UI and a GUI different from the UI and GUI to recognize the emergency situation to the wearer and others.

The sound output unit outputs audio data received from the first communication unit or stored in the memory through functions such as a signal reception, a call mode or a recording mode, a voice recognition mode, and a broadcast reception mode. In addition, the sound output unit outputs a function performed in the danger detection unit, for example, a buzzer according to an emergency situation or a set voice signal indicating an emergency, and includes a speaker, a buzzer, and the like.

In addition, the vibrating unit is configured to output a vibration signal for informing occurrence of an event to the danger sensing unit. Examples of the event occurring in the danger sensing unit 1 include signal reception, message reception, and key signal input. Also. When the key signal is input, the vibrator can output the signal as a feedback to the key signal input.

In addition, the risk sensing unit 1 may include a power supply unit for receiving external or internal power and supplying power necessary for operation of the respective components, a program for control, and a temporary storage unit It is to be understood that the present invention may be embodied in many other specific forms without departing from the spirit or essential characteristics thereof.

In the present invention, the danger detection unit 1 may be an Internet of Thing (IOT) device that shares information through a wired / wireless network, and may be a WEARABLE DEVICE, WEARABLE GRASS, (MOBILE STATION), MSS (MOBILE SUBSCRIBER STATION), SS (SUBSCRIBER STATION), AMS (ADVANCE MOBILE STATION), WT (WIRELESS TERMINAL), MTC MACHINE-TO-DEVICE device, M2M (MACHINE TO MACHINE) device, D2D device (DEVICE-TO-DEVICE) device, or the like.

The control server 2 collects and manages signals transmitted from a plurality of the risk sensing units 1 to support measures for propagating or responding to a risk response or a tampering when a dangerous situation occurs. The first communication unit 14, And a status propagation unit 22 for transmitting the received determination result or the emergency rescue request to the designated terminal 3. The second communication unit 21 is connected to the second communication unit 21,

The control server 2 is a series of devices capable of directly communicating with the risk sensing unit 1. The control server 2 may be implemented as a server, a personal computer (PC) or a user equipment, It can be used as a desktop (Desk Top), a laptop (Raptop), a Tablet PC (Tablet PC), a Smart Phone, a Wi-Fi phone, an Internet Protocol (IP) phone, an Access Point (AP), a Home Gateways (HGW) Set Top Box), a Personal Computer (PC), a mobile phone, a cellular phone, a PCS (Personal Communication Service) phone, a GSM (Global System for Mobile) phone, a WCDMA (Wideband CDMA) A PDA (Personal Digital Assistants), a PMP (Portable Multimedia Player), or the like.

In the case of the designated terminal 3, the collected data of the danger detection unit can be confirmed using the network connected to the control server 2 and the risk detection unit 1 in addition to receiving the received determination result or the emergency rescue request, It is possible to mount an application which is software that can modify the reference value of the situation judgment of the judgment unit 13. [

3 is a block diagram illustrating a configuration and a connection relationship according to the second embodiment of the present invention.

The danger detection unit 1 further includes a camera 16 for photographing the operator's surroundings and a microphone 17 for receiving the operator and the ambient sound, and the first communication unit 14 Is configured to transmit to the control server (2) an image of the camera (16) and an input sound of the microphone (17).

The camera 16 is for inputting a video signal or an image signal captured by the operator or the operator, and may include one or more as needed. The camera 16 processes an image frame such as a still image or a moving image obtained by the image sensor in a video communication mode or a photographing mode, and the processed image frame is stored in a memory, Lt; / RTI > When the image signal or the video signal is used as detection information for determining a dangerous situation, the image signal and the video signal are transmitted to the determination unit 13.

The microphone 17 is for inputting a voice signal. The microphone 17 receives an external sound signal through a microphone in a call mode, a recording mode, a voice recognition mode, or the like, and processes it as electrical voice data. The processed voice data can be converted into a form that can be transmitted to the control server through the first communication unit 14 in a communication mode and output. In addition, the microphone 17 may use various noise elimination algorithms for eliminating noise generated in receiving an external sound signal.

In addition, in the second embodiment of the present invention, the control server 2 receives a work schedule for each worker, presents a sensor module according to a job schedule, and determines whether the collection module 12 is configured through a combination of the sensor modules And a module management unit 23 for informing via the interface unit 15. [

That is, the collecting unit 12 is configured so that the operator can selectively combine and connect the selected sensor modules corresponding to the work site to be inputted by the operator among the plurality of the sensor modules mentioned above. For example, in a work environment such as NOx, sulfur oxides, carbon monoxide, or radiation, which is not likely to occur at all, it is not necessary to select a sensor module for measuring such factors.

In response to this, the module management unit 23 of the control server 2 inputs and reviews the job schedule of the corresponding worker in advance, and the data in which the sensor modules arranged according to each job content are arranged, The module is suitably selected to confirm whether the collecting unit 12 is configured and can be confirmed by the operator so that the conformity of the configuration of the collecting unit 12 and the operation of the risk sensing unit 1 can be efficiently performed .

FIG. 4 is a state diagram illustrating a repeater according to the second embodiment of the present invention. In the present invention, in order to prevent LPWA communication from being performed in a compartment such as various construction or shipbuilding, And a relay unit 4 for supporting data transmission and reception. The relay unit 4 includes a first antenna unit 41 and a second antenna unit 42, a cable 44 and a housing body 43 in detail.

The first antenna unit 41 performs wireless communication with the first communication unit 14 and converts the received wireless signal into a wire signal. The first antenna unit 41 is provided at one end of the cable 44 to transmit a signal transmitted from the first communication unit 14 through the cable and supports communication in an area where wireless communication is not smooth .

The second antenna unit 42 is installed at the other end of the cable 44 and converts the wired signal formed through the cable 44 into a wireless signal to communicate with the second communication unit 21 .

At this time, the cable 44 is provided in an appropriate length according to the situation of a work site, and a cable 44 is wound around the cylindrical housing 43 for convenience of transportation and storage, The cable 44 can be loosened.

The relay unit 4 includes a power supply unit for receiving external or internal power and supplying power necessary for the operations of the first antenna unit 41 and the second antenna unit 42, So that detailed description thereof will be omitted.

FIG. 5 is a perspective view showing a structure of a cover according to a third embodiment of the present invention, and FIG. 6 is a sectional view showing the structure of a cover according to a third embodiment of the present invention.

Since the work environment such as construction, heavy industry, and the like to which the present invention is applied is an environment in which dust and dust are mostly generated, various troubles may occur when the risk sensing unit 1 including the precise sensor module is exposed to such work environment, There is a high possibility that the danger sensing portion 1 is damaged in a middle tool or various structures.

In the third embodiment of the present invention, a cover (not shown) is provided to protect the performance of a sensor module provided in an environment with a large amount of contaminants such as dust, dust, (18).

The cover 18 is basically made of rubber or urethane which is made of a soft material or a case in which a part of the cover 18 is partially used. The cover 18 is configured to seal and enclose the danger sensing portion 1 to protect it from external impact, So that the danger sensing portion 1 in a state in which the cover is covered can be smoothly worn at a desired position.

At this time, a first through hole 181 and a second through hole 183 penetrating through the inside and the outside of the cover 18 are respectively formed so as to allow smooth ventilation, and the first through hole 181 The first through hole 183 and the second through hole 183 together with the filter 185 capable of preventing dust and dust from entering into the first through hole 181 and the second through hole 183 And a second suction fan 184 is installed inside the second suction fan 184 so that the outside air can flow smoothly.

The first suction fan (182) and the second suction fan (184) are driven, and the first suction fan and the second suction fan (184) are driven and controlled in addition to a small battery type power source for driving the first suction fan And a controller 186 for selectively driving the fan 182 and the second suction fan 184 in accordance with the driving loads.

That is, the first suction fan 182 and the second suction fan 184 are individually operated to suck air into the cover through the first through holes 181 and the second through holes 183, respectively, So that selective suction is performed through the through hole 181 or the second through hole 183. In this state, only the first suction fan 182 is operated to suck air through the first through-hole 181 and discharge through the second through-hole 183, thereby closing the filter of the first through- The control unit 186 stops the first suction fan 182 and operates only the second suction fan 184 to generate an air flow in the reverse direction, The sensor can be smoothly operated and the filter provided in the closed first through hole 181 can be backwashed by the back pressure and the life of the filter can be increased.

Hereinafter, a process in which the risk sensing unit 1 determines a risk sensing element and processes information according to the present invention will be described.

When the operation of the danger sensing unit 1 is changed from the dormant state to the active state by turning on the power supply of the danger sensing unit 1, the danger sensing unit 1 is connected to the control server 2, Lt; / RTI >

In this case, if the connection fails, the risk sensing unit 1 can perform a connection attempt until the connection succeeds according to the setting. If the connection is successful, the risk sensing unit 1 transmits the connection And acquires environmental condition data around the operator.

If the acquired status data value is judged to be dangerous or dangerous, it is notified to the operator through the alarm signal that the dangerous situation is present, otherwise, the surrounding environment information is acquired again.

And transmits the current status to the control server 2 by using the first communication unit 14 in the danger detection unit 1 after recognizing the operator as an alarm signal such as a dangerous situation sound, vibration, light or the like.

The control server (2) receiving the dangerous situation or the rescue signal automatically transmits the contents of the danger and the position of the operator to the mobile communication terminal (3) of the resident party.

The control server 2 requests the information of the risk detection unit 1 again by the LPWA communication when requesting additional information to the control server 2,

If additional information on the accident worker is not needed and relief is taken and the action is not completed, the information is transmitted to the mobile communication terminal of the accident structure manager regularly. If the structure is completed, the user returns to the surrounding environment measurement stage again.

The embodiments described in the present specification and the configurations shown in the drawings are only the most preferred embodiments of the present invention and are not intended to represent all of the technical ideas of the present invention. It is to be understood that equivalents and modifications are possible.

1: danger detection unit 11:
12: collecting unit 121: temperature sensor module
122: Oxygen sensor module 123: Carbon monoxide sensor module
124: Nitroxide sensor module 125: Sulfate sensor module
126: combustible gas sensor module 127: radiation dose sensor module
128: acceleration sensor module 129: GPS module
13: Judgment section 14: First communication section
15: interface unit 16: camera
17: microphone 18: cover
181: first through hole 182: first suction fan
183: second through hole 184: second suction fan
185: filter 186:
2: control server 21: second communication section
22: situation propagation unit 23: module management unit
3: Terminal 4:
41: first antenna unit 42: second antenna unit
43: housing body 44: cable

Claims (6)

A low power wide area (LPWA) communication based worker risk detection system,
(11) for fixing the worker's body, clothing or a tool holder, a collecting section (12) composed of a sensor module capable of measuring a work environment element, and a measuring section A first communication unit 14 for communicating with at least one external device via the LPWA, for transmitting a determination result of the determination unit 13 and receiving a control signal, And an interface unit (15) for requesting an emergency structure from the operator, transmitting the emergency structure through the first communication unit (14), and outputting a result of the determination of the dangerous state of the determination unit (13);
A second communication unit 21 for communicating with the first communication unit 14 and a control server 2 having a status propagation unit 22 for transmitting the received determination result or the emergency response request to the designated terminal 3, ; Wherein the LPWA communication-based operator's risk detection system comprises:
The method according to claim 1,
The risk detection unit 1 further includes a camera 16 for photographing the operator's surroundings, and a microphone 17 for receiving the operator and surrounding sounds,
Wherein the first communication unit (14) is configured to transmit the photographed image of the camera (16) and the microphone input sound to the control server (2).
The method according to claim 1,
A first antenna unit 41 for communicating with the first communication unit 14 and converting the received radio signal into a wired signal, a second antenna unit 42 for converting the wired signal into a radio signal and communicating with the second communication unit 21, A cable 44 for connecting a first antenna unit 41 and a second antenna unit 42 to one end and the other end of the antenna unit 42 to transmit a wire signal, A relay section (4) composed of a housing body (43) for storing therein; Wherein the LPWA communication-based operator risk detection system further comprises:
The method according to claim 1,
The sensor module includes a temperature sensor module 121, an oxygen sensor module 122, a carbon monoxide sensor module 123, a nitrate sensor module 124, a sulfur oxide sensor module 125, a combustible gas sensor module And an acceleration sensor module 128 and a GPS module 129. The LPWA communication-based worker 126 is configured to be able to use selected sensor modules in combination with the radiation sensor module 126, the radiation dose sensor module 127, the acceleration sensor module 128, Hazard detection system.
5. The method of claim 4,
The control server 2 receives a work schedule for each worker, presents a sensor module according to a job schedule, determines whether the collection module 12 is configured through a combination of the sensor modules, Further comprising a management unit (23).
5. The method of claim 4,
A first hole 181 having a filter 185 and a first suction fan 182 on one side and a second hole 181 having a filter 185 and a second suction fan 182 on the other side, And a control unit 186 selectively driving the first and second suction fans 182 and 184 to reflect the driving loads of the first and second suction fans 182 and 184, A cover 18 to which the fixing portion 11 is exposed; Wherein the LPWA communication-based operator risk detection system further comprises:

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