KR102295308B1 - Wearable safety terminal and control method for accident prevention using the same - Google Patents

Abstract

The present invention is not a passive means such as a monitoring device installed at a work site, such as a construction site, a construction site, an industrial site, etc., but a terminal that the worker can directly wear on his/her own body, such as a helmet or clothes, the risk of an accident A variety of processes are performed to prepare for the occurrence of accidents by workers while monitoring in real time that workers approach or enter the hazardous area in advance with respect to the hazardous area, such as the area where this high equipment is installed or the area with a history of accidents. An object of the present invention is to provide a body-wearable safety terminal and an accident prevention control method using the same, which can be used as a more active means such as to prevent accidents of workers at work sites and to effectively cope with accidents.

Description

Body wearable safety terminal and accident prevention control method using the same

The present invention relates to a safety terminal that can be worn on a worker's body and a control method therefor, which enable effective response to accidents and prevention of accidents for workers working in a hazardous area of the field in an industrial site or the like.

In general, various accidents such as accidents caused by equipment or accidents such as falling or falling in the course of a worker's work occur because various dangerous tasks are performed at work sites such as construction sites, construction sites, and industrial sites. do.

In order to prevent various accidents occurring at the work site, accident prevention guide signs are attached to the site or CCTVs are installed throughout the site, and the manager of the control center monitors the occurrence of accidents while checking the CCTV screens. It is common to take several measures to prevent accidents in

However, even if accident prevention guide signs are posted in various places in the workplace, there are many cases where workers pass by unintentionally. Although the control center does real-time monitoring, there are many cases where CCTV is not installed, and it is difficult to install all CCTVs. It is necessary to systematize accidents so that accidents can be prevented and dealt with by more active and active means.

[Prior art literature]

Patent Application No. 10-2017-0108213

Patent Application No. 10-2016-0069749

Patent Application No. 10-2017-0021527

The present invention is not a passive means such as a monitoring device installed at a work site, such as a construction site, a construction site, an industrial site, etc., but a terminal that the worker can directly wear on his/her own body, such as a helmet or clothes, the risk of an accident A variety of processes are performed to prepare for the occurrence of accidents by workers while monitoring in real time that workers approach or enter the hazardous area in advance with respect to the hazardous area, such as the area where this high equipment is installed or the area with a history of accidents. An object of the present invention is to provide a body-wearable safety terminal and an accident prevention control method using the same, which can be used as a more active means such as to prevent accidents of workers at work sites and to effectively cope with accidents.

In an accident prevention control method using a body-wearable safety terminal according to an embodiment of the present invention, the safety terminal worn on the worker's body receives an external signal so that the operator is pre-set in a preset area as a danger area in the workplace. Detecting an approach within a set distance or entering the danger area; alarming the operator through at least one of a danger warning sound, voice guidance, and vibration according to the approach or entry when the approach or entry into the danger area is detected; executing a real-time location transmission process for continuously transmitting the location information of the worker to a control center or server according to detecting the approach or entry; executing a real-time image transmission process of transmitting the image acquired by the camera of the safety terminal to the control center or the server in real time as the approach or entry is detected; And by using the sensing result of the sensing unit provided in the safety terminal to detect the fall and fall of the worker and includes the step of executing a fall and fall detection process for responding to the occurrence of an accident.

Also preferably, the step of detecting the entry into the danger area, the beacon communication unit provided in the safety terminal using a beacon signal received from a beacon terminal within a signal reception range among a plurality of beacon terminals installed around the danger area and calculating the location information of the worker wearing the safety terminal, the worker using the location information of the dangerous area stored in advance in the safety terminal and the calculated location information of the worker, the distance set in advance to the risk area It characterized in that it comprises the step of detecting whether approaching within or whether the operator enters into the danger area.

Also preferably, the step of calculating the location information of the worker wearing the safety terminal comprises transmitting a beacon signal transmitted by each of the first beacon module, the second beacon module and the third beacon module provided in the beacon terminal to the safety terminal. Comprising the step of calculating the position information of the worker wearing the safety terminal from the distance value calculated from the RSSI value of the beacon signal of each of the at least two beacon modules received by the beacon communication unit of the terminal and the phase of each beacon module characterized.

Also preferably, when a plurality of workers work in the danger area as a group, calculating the location information of the worker wearing the safety terminal includes calculating the location information of each of the plurality of workers, , calculating the distance between the plurality of workers, and when it is determined that the calculated distance between the plurality of workers is more than a preset distance, the safety terminal of each worker provides an alarm regarding distance deviation and sends the It characterized in that it further comprises the step of transmitting an alarm regarding distance departure.

Also preferably, the sensing unit provided in the safety terminal includes an acceleration sensor and a gyro sensor, and the safety terminal presets information about a change in gravity acceleration and a change in a three-axis rotation angle when a worker falls and falls. And, the step of executing the fall and fall detection process, the safety terminal from the information about the preset gravitational acceleration and the change of the three-axis rotation angle using the respective sensing values of the acceleration sensor and the gyro sensor provided in the safety terminal. It characterized in that it comprises the step of continuously determining whether the worker wearing the terminal falls and falls.

Also preferably, the sensing unit provided in the safety terminal includes an acceleration sensor and a gyro sensor, and the safety terminal presets information about a change in the gravitational acceleration and a change in the three-axis rotation angle during a fall of an operator and a fall. and setting in advance with respect to the change characteristics of the image acquired by the camera when the worker falls and falls, and the step of executing the fall and fall detection process includes information about the preset gravitational acceleration and the change of the three-axis rotation angle analyzing each of the sensing values of the acceleration sensor and the gyro sensor provided in the safety terminal according to and determining whether the worker wearing the safety terminal falls or falls by using the analysis result of the respective sensing values of the acceleration sensor and the gyro sensor and the analysis result of the change in the image.

Also preferably, the safety terminal stores information about the characteristics of each danger area in the workplace in advance and recognizes information about the characteristics of the danger area that the operator approaches or enters in the step of detecting entering the danger area Or, in the step of detecting the entry into the danger zone, the operator receives and recognizes information about the characteristics of the danger zone from the server with respect to the danger zone approached or entered, and the risk recognized by the safety terminal It characterized in that it further comprises the step of voice guiding the content that is stored in advance as content corresponding to the characteristic of the region.

On the other hand, the body-wearable safety terminal according to an embodiment of the present invention is a body-wearable safety terminal that is worn on the body of a worker and performs a process for preventing accidents in a dangerous area, and a camera for acquiring an image at a predetermined angle of view ; an image processing unit for processing the image acquired by the camera according to preset items; a beacon communication unit that exchanges a beacon signal with a beacon terminal installed in the vicinity; a sensing unit including an acceleration sensor and a gyro sensor for detecting the operator's actions; a sound module to provide voice and sound; And information on the danger area in the workplace is stored in advance, and by analyzing the beacon signal received by the beacon communication unit from the beacon terminal within the signal reception range among a plurality of beacon terminals installed in the vicinity, the location information of the worker wearing the safety terminal is obtained. Calculating, by detecting whether the operator approaches within a preset distance to the danger area or whether the operator enters the danger area, at least one of a danger warning sound and voice guidance according to the approach or entry through the sound module and a controller for detecting a fall and a fall of the worker using the sensing result of the sensing unit and executing a fall and fall detection process for responding to an accident.

The body wearable safety terminal and the accident prevention control method using the same according to the present invention are not passive means such as a monitoring device installed in a work site such as a construction site, a construction site, an industrial site, etc. By using a terminal that can be worn on the body, it is set in advance for a danger area such as an area where equipment with a high risk of accidents is installed or an area with a history of accidents, and the operator approaches or enters the danger area in real time As a more active means, such as performing various processes to prepare for worker accidents while monitoring them with

1 is a block diagram illustrating an example of a configuration of a body-wearable safety terminal and a network system capable of communicating therewith according to an embodiment of the present invention.
2 is a flowchart illustrating an accident prevention control method using a body-wearable safety terminal according to an embodiment of the present invention.
3 is a view for explaining the detection of the approach or entry of the operator to the danger area through the beacon terminal installed around the danger area in the workplace by the safety terminal according to an embodiment of the present invention.
4 is a view for explaining the principle of calculating location information using a beacon signal between the beacon terminal and the safety terminal.
5 is a diagram illustrating an example of detecting an approach or entry to a danger area using map information using the location information of the operator.
6 and 7 are each a flowchart showing a control method of a safety terminal according to another embodiment of the present invention.

The body wearable safety terminal and the accident prevention control method using the same according to the present invention will be described in more detail with reference to the drawings.

The body-wearable safety terminal according to the present invention may be implemented as a portable terminal in a form that the worker can wear on his/her body, that is, the clothes or helmet the worker is wearing, the wrist or ankle, the waistband, and the like.

1 is a block diagram illustrating an example of a configuration of a body-wearable safety terminal and a network system capable of communicating therewith according to an embodiment of the present invention.

As shown in FIG. 1 , the body wearable safety terminal according to an embodiment of the present invention includes a camera 100 , an image processing unit 110 , a storage unit 120 , a beacon communication unit 200 , and a sound module 300 . , an acceleration sensor 410 , a gyro sensor 420 , and a controller M may be included.

The camera 100 is a component that acquires an image at a predetermined angle of view and acquires an image seen from the operator's point of view during the operation of the operator, and the image acquired by the camera 100 is a control center (CS) or server (SV) in real time. ) and used as an image in case of an accident or as a surveillance image of the control center (CS).

The image processing unit 110 is a component that performs image processing according to a preset image processing technique on the image acquired by the camera 100 , and may perform, for example, a difference image between a reference image and a target image. The result of the image processing by the image processing unit 110 may be used together with sensing results of an acceleration sensor and a gyro sensor to be described later to determine whether an accident has occurred to the operator.

The storage unit 120 is a component for storing data required when the control unit M performs a predetermined operation and determination. The storage unit 120 may store a predetermined sound source file for outputting a voice or a warning sound by the sound module 300, and in particular, map information about the workplace may be stored, and the possibility of an accident in the workplace It is possible to store information about the location of the area set as a dangerous area, such as where the high equipment is installed or there is an accident history, and the location of the beacon terminal (BT).

The beacon communication unit 200 receives a predetermined beacon signal from a nearby beacon terminal (BT) through short-range wireless communication based on a Bluetooth 5.0 (BLE) protocol, and a control center (CS) or a server through the beacon terminal (BT) It is a component that allows information such as image information and location information to be transmitted to (SV).

The sound module 300 is a component that processes data related to sound, such as a voice or a warning sound to be output through a speaker (not shown) (not shown).

The acceleration sensor 410 is a sensor for detecting a change in gravitational acceleration according to the posture of a safety terminal having the same, and the gyro sensor 420 is a sensor for detecting a change in rotation angle in each of the three axes in the axial direction. By analyzing the sensing results of the sensor 410 and the gyro sensor 420 , the operator's behavior can be estimated.

The control unit (M) is a component that functions to control all of the above components, and sets information on a dangerous area in the workplace in advance, and receives a beacon from a beacon terminal within a signal reception range among a plurality of beacon terminals installed in the vicinity. The communication unit 200 analyzes the received beacon signal to calculate the location information of the worker wearing the safety terminal, and detects whether the worker approaches within a preset distance to the danger area or whether the operator enters the danger area. Alternatively, at least one of a danger warning sound and voice guidance according to the entry is output through the sound module 300, and the fall and fall of the operator are detected using the sensing results of the acceleration sensor 410 and the gyro sensor 420. and implement a fall and fall detection process to respond in the event of an accident.

An accident prevention control method using a body-wearable safety terminal according to an embodiment of the present invention having the configuration as described above will be described with reference to the flowchart shown in FIG. 2 .

The worker receives a beacon signal from a beacon terminal installed around the danger area while moving to a work position in the workplace while wearing the safety terminal according to the present invention (S100), and the beacon communication unit of the safety terminal that has received the beacon signal receives the From one beacon signal, the current position of the safety terminal, that is, the current position information of the operator is calculated (S110).

Since the safety terminal stores information about the location of the danger zone in advance, using the current location information of the operator calculated in step S110, compared with the location of the previously stored danger zone, how much approach or entry into the danger zone It can be determined whether or not (S120).

As a result of judging using the location information of the operator calculated using the beacon signal as described above, if it is determined that the operator approached the current danger area within a preset distance, or if it is determined that the operator entered the danger area, the safety terminal in that case An alarm for accident prevention is provided to the operator by outputting a danger warning sound preset to output, outputting a voice guiding that the operator has approached the current danger area considerably or entering the danger area, or outputting vibration (S130) ).

And, as described above, when the operator approaches the current danger area within a preset distance or enters the danger area, the safety terminal transmits the location information calculated from the beacon signal to the control center or server in real time to the control center or server allows the operator to monitor the movement of the worker (S140), operates the safety terminal camera to shoot an image within the field of view, and transmits the captured image to the control center or server in real time so that the control center or server performs real-time monitoring to do so (S150).

Then, the safety terminal executes the fall and fall detection process of the operator preset by the control unit (S160).

Among the processes of the various steps described above, first, the contents of calculating the position information of the operator using the beacon signal of steps S100 to S120 will be described in more detail with reference to FIGS. 3 to 5 .

3 is a view for explaining the detection of the approach or entry of the operator to the danger area through the beacon terminal installed around the danger area in the workplace by the safety terminal according to an embodiment of the present invention, Figure 4 is a beacon terminal It is a view for explaining the principle of calculating location information using a beacon signal between and It is a drawing showing about an example.

As shown in FIG. 3 , a predetermined area in which a workstation WS for work is installed can be set as the danger area DR, and a predetermined distance inside or outside the danger area DR is located in the danger area DR. ), one or more beacon terminals BT1 to BT6 may be installed depending on the size of the workplace or the size of the workplace.

The beacon terminals (BT1 to BT6) are devices for wireless communication with a beacon communication unit built in a safety terminal (ST, a safety terminal according to an embodiment of the present invention) possessed by the worker P, and each beacon terminal Two or more beacon modules are built in (BT1 to BT6), and each of the built-in beacon modules transmits a beacon signal.

The safety terminal ST worn on the body of the worker P receives a beacon signal from the beacon terminal BT5 within the effective reception range, and uses the beacon signal to obtain the position information (strictly safety) of the worker wearing the safety terminal. location information of the terminal).

In addition, each beacon terminal is connected to a control center or server to communicate by wire or wirelessly, and the beacon terminal transmits information transmitted by the beacon communication unit of the safety terminal to the control center or server.

4 shows an example of calculating the location information by receiving the beacon signal transmitted by the beacon terminal BT as described above by the safety terminal ST.

4 , the beacon terminal BT may include a first beacon module Bm1, a second beacon module Bm2, and a third beacon module Bm3 (at least two beacon modules are provided). It is preferable to be).

Each beacon module (Bm1, Bm2, Bm3) transmits a beacon signal, respectively, and can receive a beacon signal from each of the beacon modules (Bm1, Bm2, Bm3) in the receiving range of the beacon communication unit of the safety terminal (ST). .

At this time, each beacon signal transmitted by each beacon module (Bm1, Bm2, Bm3) transmits a Received Signal Strength Indication (RSSI) value, and the beacon communication unit of the safety terminal can calculate a distance value from the RSSI value of each beacon signal. have.

Here, since the RSSI value is a signal strength value of the received beacon signal, the safety terminal may calculate the distance using the preset output signal strength of the beacon signal and the signal strength of the received beacon signal.

For example, as shown in Figure 4, the distance value d1 can be calculated from the beacon signal of the first beacon module Bm1, and the distance value d2 can be calculated from the beacon signal of the second beacon module Bm2, The distance value d3 may be calculated from the beacon signal of the third beacon module Bm3.

In this case, the distance a1 between the first beacon module Bm1 and the second beacon module Bm2, the distance a2 between the second beacon module Bm2 and the third beacon module Bm3, and the first beacon Since the distance (a1+a2)) between the module Bm1 and the third beacon module Bm3 is known as a fixed value, the distance value is calculated from the signals of two beacon modules among the three beacon modules. It is possible to calculate the position of the safety terminal (ST).

Among the signals transmitted by each of the three beacon modules, a signal having a poor signal strength, etc. is discarded and two signals are taken to calculate the location information from the distance value.

When the position information (location information of the operator) of the safety terminal is calculated in this way, it can be known whether the operator approaches the danger area within a predetermined distance or enters the danger area using the preset position of the danger area. This is exemplified in FIG. 5 .

Figure 5 shows the danger area (dr), the position (bt1 ~ bt6) of each beacon terminal, and the position (p or p') of the operator in the form of map information on the xy plane, one form recognized by the safety terminal it has been shown

When the position (p) of the operator is calculated in the same manner as described in FIG. 4 through the beacon signal from the beacon terminal, the position of the danger area (dr) is predetermined, so the position (p) of the operator and the danger area ( dr), it is possible to calculate the distance D between It can be set when the distance between the position (p) of the operator and the danger area (dr) is within a preset distance).

According to the flowchart of FIG. 2 described above, when it is determined that the operator approaches or enters the preset danger area in the same manner as described above, the safety terminal provides a danger warning sound or voice guidance to the operator, in this case or As another embodiment, a case in which customized guidance for each danger area is provided to the operator will be described with reference to FIG. 6 .

The safety terminal according to another embodiment of the present invention can store information about the characteristics of each danger area in the workplace in advance, or receive information about the characteristics of the danger area from the server for the danger area that an operator approaches or enters. have.

For example, information on the characteristics of each risk area may be stored in advance or transmitted from the server, such as a risk area in which noise is generated, a danger area in which high heat is generated, and a risk area in which an accident risk is high during equipment operation.

As shown in FIG. 6 , the safety terminal according to another embodiment of the present invention maps the current location to the location of the beacon terminal or map information of the workplace in the manner described above, and the location of the danger area where the operator currently approaches or enters. can be confirmed (S131).

And, the safety terminal recognizes the information about the characteristics of the danger area approached or entered by the current worker (S132).

The safety terminal stores each characteristic information for several danger areas in advance, checks where the danger area currently approached or entered by the operator is, and extracts information about the characteristics of the danger area from the previously stored information to recognize it. Alternatively, the safety terminal may recognize where the safety terminal currently approaches or enters the danger zone and transmits it to the server, so that the server transmits information about the characteristics of the danger zone to the safety terminal.

As described above, when the safety terminal device operator approaches or recognizes the characteristics of the entered danger zone, content corresponding to the characteristic of the danger zone may be extracted from the storage unit and guided to the operator by voice (S133).

For example, if the danger area currently approached or entered by the operator has the characteristic that it is an area generating high heat, the safety terminal recognizes this and says, "The currently approached/entered area is an area where work is performed in a work environment of 50 degrees or more. As a high temperature of 100 degrees or more is often generated from the equipment, please pay special attention to the risk of burns."

In this way, the safety terminal according to another embodiment of the present invention identifies the characteristics of each danger area, and performs a function of guiding the operator so that the operator can respond to the characteristics of the approached or entered danger area. It has a special advantage that induces special efforts to prevent accidents.

On the other hand, although it has been previously described that the fall and fall detection process of the operator is executed through the flowchart of FIG. 2 , this will be described in more detail with reference to FIG. 7 .

When the process of detecting the fall and fall of the worker is in progress according to the accident prevention control method of the safety terminal according to the present invention, the safety terminal may detect the fall and fall of the worker using the sensing results of the acceleration sensor and the gyro sensor Also, the fall and fall of the operator may be detected by considering the analysis result of the image acquired by the camera.

In the flowchart of FIG. 7 , the safety terminal detects the fall and fall of the operator in consideration of the sensing results of the acceleration sensor and the gyro sensor and the analysis result of the image acquired by the camera, but the flow shown in FIG. Except for the case of using the analysis result of the camera image in the chart, the safety terminal is a process of detecting the fall and fall of the operator using the sensing result of the acceleration sensor and the gyro sensor. have.

Referring to the flowchart shown in FIG. 7 , the control unit of the safety terminal according to an embodiment of the present invention may preset information regarding a change in the acceleration of gravity and a change in a three-axis rotation angle during a fall of an operator and a fall. (S161). In addition, it can be set in advance with respect to the change characteristics of the image acquired by the camera when the operator falls and falls (S161).

When the worker approaches or enters the danger area within a predetermined distance while wearing the safety terminal according to an embodiment of the present invention, the fall and fall detection process is executed, and the acceleration sensor and the gyro sensor acquire sensing values in real time, respectively. do (S162). In addition, the camera also shoots an image in real time (S164).

As described above, whenever sensing values of the acceleration sensor and the gyro sensor are acquired, the control unit analyzes the sensing value of the acceleration sensor according to the preset information on the change in gravitational acceleration, and relates to the change in the preset three-axis rotation angle. The sensed value of the gyro sensor is analyzed according to the information (S163).

Through the analysis of the sensed value, the control unit determines whether the operator falls or falls (S166).

As a result of the analysis of the sensed value, the value of the sensing value of the acceleration sensor and the sensing value of the gyro sensor or a value obtained by applying a preset function to these sensing values is preset for the fall of the worker and the change in the gravitational acceleration at the time of the fall and the three-axis rotation angle When it is included in the range of values according to the information about the change, the control unit may determine that the operator has fallen or that he has fallen.

As described above, when the control unit determines whether the worker falls or falls as a result of determining whether the worker has fallen or falls (S167), the safety terminal may transmit an emergency rescue request signal to the control center or server, and request an emergency stop of the system A signal may be transmitted (S168), and accordingly, the control center or server may make an emergency rescue request to 119 or emergency stop the system.

On the other hand, in steps S162 and S163, it is also possible to determine whether the worker falls or falls using only the analysis results of the values sensed by the acceleration sensor and the gyro sensor, but the accurate fall is determined only by the sensing values of the acceleration sensor and the gyro sensor. and a fall judgment may not be made.

Therefore, in order to further increase the accuracy of the fall and fall detection accuracy of the operator, the control unit analyzes the change in the image using the result of performing a predetermined image processing on the image captured by the camera in the above step S164 through the image processing unit, The image change can be analyzed according to the information about the set image change characteristic (S165), and the result of the image analysis is combined with the analysis result of the sensing values of the acceleration sensor and the gyro sensor calculated in step S163. It can be used to judge falls and falls.

For example, when an operator falls or falls, the image acquired by the camera changes faster than in the normal case, so if the difference image processing is performed in the normal case where the image change is slow, the reference image and the target image (target If the image is the current frame image, the reference image may be the image of the previous frame or the image of the frame temporally earlier than that) The part that is removed as the difference image (the pixel value of 0 in the difference image) because there are many overlapping pixel parts ) is quite large.

However, when the image changes rapidly, when the difference image between the reference image and the target image is performed, for example, when the difference image between the previous frame image and the current frame image is performed, the pixel portion that is removed because there is little overlap and many changed parts. This will be much less.

It can be set in advance with respect to the range of pixel values of the remaining pixel portion of the difference image as described above in the fall and fall image change characteristics set in advance in step S161, and analysis of the image acquired by the camera in step S165 In the process, when the range of pixel values of the pixel portion remaining through the difference image is included in the preset range, it may be determined as a case in which the worker falls and falls.

Of course, rather than judging falls and falls only by analyzing changes in the image or by analyzing the values sensed by the accelerometer and gyro sensor, all analysis results can determine falls and falls by considering both the former and the latter. Falls and falls may be judged as falls if the conditions are met.

On the other hand, as an accident prevention control method of a safety terminal according to another embodiment of the present invention, although not shown in the drawings, there may be cases in which a plurality of workers work in a dangerous area as a team.

The safety terminal according to another embodiment of the present invention may calculate the location information of each of a plurality of workers when calculating the location information of the worker wearing the safety terminal using the beacon signal described above, and the calculated location A distance between the plurality of workers may be calculated based on the information.

And, when the safety terminal of each worker determines that the distance between the plurality of workers calculated as described above has fallen by more than a preset distance, the safety terminal of each worker provides an alarm about distance deviation and the distance between the plurality of workers to the control center By sending an alarm about departure, even when a plurality of workers work in a hazardous area as a team, it is possible to provide customized accident prevention content for such a task.

ST: safety terminal, BT: beacon terminal
100: camera, 200: beacon communication unit
300: sound module, 410: acceleration sensor
420: gyro sensor, M: control unit

Claims (8)

Sensing that the safety terminal worn on the worker's body receives an external signal and the worker approaches or enters the hazardous area within a preset distance to a preset area as a hazardous area in the workplace;
alarming the operator through at least one of a danger warning sound, voice guidance, and vibration according to the approach or entry when the approach or entry into the danger area is detected;
executing a real-time location transmission process for continuously transmitting the location information of the worker to a control center or server according to detecting the approach or entry;
executing a real-time image transmission process of transmitting the image acquired by the camera of the safety terminal to the control center or the server in real time as the approach or entry is detected; and
Detecting the fall and fall of the worker using the sensing result of the sensing unit provided in the safety terminal, and executing a fall and fall detection process for responding to the occurrence of an accident,
The sensing unit provided in the safety terminal includes an acceleration sensor and a gyro sensor, and the safety terminal sets in advance information about a fall of a worker and a change in gravitational acceleration and a change in a three-axis rotation angle at the time of a fall, and the fall of the worker And set in advance with respect to the change characteristics of the image acquired by the camera during a fall,
The step of executing the fall and fall detection process comprises:
analyzing the respective sensing values of the acceleration sensor and the gyro sensor provided in the safety terminal according to the preset information on the change of the gravitational acceleration and the three-axis rotation angle;
Analyzing whether the degree of change of the image acquired by the camera of the safety terminal changes more rapidly when compared with the information about the change characteristic of the preset image;
Body wearable type, characterized in that it comprises the step of determining whether the worker wearing the safety terminal falls or falls using the analysis result of the respective sensing values of the acceleration sensor and the gyro sensor and the analysis result of the change in the image Accident prevention control method using safety terminal. The method of claim 1, wherein the step of detecting entering the danger zone comprises:
Calculating the location information of the worker wearing the safety terminal by using a beacon communication unit provided in the safety terminal using a beacon signal received from a beacon terminal within a signal reception range among a plurality of beacon terminals installed around the danger area;
Using the location information of the danger area stored in advance in the safety terminal and the calculated location information of the operator, the operator approaches the danger area within a preset distance or whether the operator enters the danger area. Accident prevention control method using a body-wearable safety terminal, comprising the steps of. According to claim 2, wherein the step of calculating the location information of the worker wearing the safety terminal,
The beacon communication unit of the safety terminal receives a beacon signal transmitted by each of the first beacon module, the second beacon module, and the third beacon module provided in the beacon terminal, and calculates from the RSSI value of the beacon signals of at least two beacon modules. Accident prevention control method using a body wearable safety terminal, comprising the step of calculating the position information of the worker wearing the safety terminal from the distance value and the phase of each beacon module. 4. The method of claim 3,
When a plurality of workers work in the dangerous area as a group, calculating the location information of the worker wearing the safety terminal includes calculating the location information of each of the plurality of workers,
calculating a distance between the plurality of workers;
When it is determined that the calculated distance between the plurality of workers is more than a preset distance, the safety terminal of each worker provides an alarm regarding distance deviation and further comprising the step of transmitting an alarm regarding distance deviation to the control center Accident prevention control method using a body wearable safety terminal, characterized in that. According to claim 1,
The sensing unit provided in the safety terminal includes an acceleration sensor and a gyro sensor, and the safety terminal presets information about a change in gravity acceleration and a change in a three-axis rotation angle during a fall of an operator and a fall,
The step of executing the fall and fall detection process comprises:
Using the respective sensing values of the acceleration sensor and the gyro sensor provided in the safety terminal, it is continuously determined whether the worker wearing the safety terminal falls or falls from the information about the preset gravitational acceleration and changes in the three-axis rotation angle. Accident prevention control method using a body-wearable safety terminal, characterized in that it comprises the step of: delete According to claim 1,
The safety terminal stores information about the characteristics of each danger area in the workplace in advance and recognizes information about the characteristics of the danger area approached or entered by the worker in the step of detecting entering the danger area, or the danger area Recognizing by receiving information about the characteristics of the danger zone from the server with respect to the danger zone approached or entered by the worker in the step of detecting entry into the
Accident prevention control method using a body-worn safety terminal, characterized in that it further comprises the step of guiding the content stored in advance as content corresponding to the characteristic of the danger area recognized by the safety terminal. As a body-wearable safety terminal that is worn on the body of a worker and performs a process for preventing accidents in a hazardous area,
a camera for acquiring an image at a predetermined angle of view;
an image processing unit for processing the image acquired by the camera according to preset items;
a beacon communication unit that exchanges a beacon signal with a beacon terminal installed in the vicinity;
a sensing unit including an acceleration sensor and a gyro sensor for detecting the operator's actions;
a sound module to provide voice and sound; and
Information on the dangerous area in the workplace is stored in advance, and the beacon signal received by the beacon communication unit from a beacon terminal within a signal reception range among a plurality of beacon terminals installed around is analyzed to calculate the location information of the worker wearing the safety terminal and outputting at least one of a danger warning sound and voice guidance according to the approach or entry by detecting whether the operator approaches the danger area within a preset distance or whether the operator enters the danger area through the sound module and a control unit for detecting a fall and a fall of the worker using the sensing result of the sensing unit and executing a fall and fall detection process for responding to an accident occurrence,
The control unit is
Pre-set information about the change in the gravitational acceleration and the change of the three-axis rotation angle during the fall and fall of the worker, and preset with respect to the change characteristics of the image acquired by the camera during the fall and fall of the worker,
Analyzes the sensing values of the acceleration sensor and the gyro sensor according to the preset gravitational acceleration and changes in the three-axis rotation angle, and the degree of change in the image acquired by the camera relates to the change characteristic of the preset image By analyzing whether it changes more rapidly when compared with information,
The body wearable safety terminal, characterized in that it is configured to determine whether the worker falls or falls by using the analysis result of the respective sensing values of the acceleration sensor and the gyro sensor and the analysis result of the change in the image.

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