KR20240056674A - Safety device that recognizes environment of construction site and prevents user from falling accidents - Google Patents

Abstract

One embodiment according to the present invention includes a light generating unit that generates light at predetermined time intervals, a light receiving unit that receives reflected light from which the light is reflected by an arbitrary object, and a light receiving unit that receives reflected light from the light generating unit based on the reflected light. A control unit that generates image information consisting of blue pixels, yellow pixels, red pixels, and black pixels according to the distance to the object, analyzes the image information and generates a danger signal, and location detection generates the user's coordinate information and speed information. A communication unit that transmits the image information, the danger signal, the coordinate information and the speed information, a vibration unit that receives the danger signal and generates vibration, a notification unit that receives the danger signal and generates an alarm sound, An air generating unit that receives a danger signal and supplies air to the belt tube, and energy in the light generating unit, the light receiving unit, the control unit, the position detection unit, the communication unit, the vibration unit, the notification unit, and the air generating unit. It is possible to provide a safety device that prevents user falls by recognizing the environment of the construction site, including the power supply unit.

Description

A safety device that recognizes the environment of a construction site and prevents users from falling accidents {SAFETY DEVICE THAT RECOGNIZES ENVIRONMENT OF CONSTRUCTION SITE AND PREVENTS USER FROM FALLING ACCIDENTS}

The present invention relates to a safety device, and more specifically, to a safety device that recognizes the environment of a construction site and prevents a user from falling.

Despite the advancement of IT in 2021, problems caused by worker falls are still becoming a social issue in the construction, shipbuilding, and automation industries. Every year, safety management is implemented in industrial sites for workers who work at heights, but the number of fall accidents among workers is increasing day by day due to the problem of supplying significantly fewer safety managers compared to workers and the long-delayed development of safety products.

Currently, according to the Occupational Safety and Health Act, workers are forced to use harness belts when working at heights. The harness belt is a method of attaching a safety ring (fastener) to a scaffold (asiba) placed at a high-altitude work site and preventing a fall when a worker falls. However, harness belts can only perform when fastened above the worker's head height, but in reality, there is no structure that can be fastened above head height, so it is often useless in the field.

Accordingly, safety devices to prevent workers from falling at high-altitude work sites are being prepared in a variety of ways and means, such as connecting the worker's body and the high-altitude site with a rope to reduce injuries in the event of a fall accident, or using nets, safety nets, etc. in the work site. By installing a safety net in the event of a fall accident, safety accidents are reduced. However, the reality is that safety management to prevent falls is insufficient at work sites where workers do not fasten ropes due to the worker's carelessness or because it interferes with work, or where it is difficult to install safety devices such as nets due to the structural characteristics of the work site.

In addition, in cases where the work site is large and there are many workers, such as a large-scale apartment construction site or a large bridge civil engineering site, the manager is not immediately aware of the worker's fall, so follow-up measures such as transport to the hospital are not taken after the fall accident. There is also the problem that the death rate increases.

Republic of Korea registered patent: No. 10-1904271 (registration announcement date: October 4, 2018)

The problem to be solved by an embodiment of the present invention is to prevent a fall accident from occurring due to a worker at a height not recognizing the fall point due to work for a certain period of time and stepping backward, even though there is a fall area behind him. The goal is to provide safety devices that recognize the environment and prevent users from falling.

The problem to be solved by another embodiment of the present invention is to prevent fall accidents for users by recognizing the environment of the construction site where a fall accident can be prevented by transmitting a danger signal through vibration and sound when the worker is located in a dangerous area. To provide a device.

The problem to be solved by another embodiment of the present invention is a safety device that updates the construction site situation in real time and recognizes the construction site environment to efficiently establish a process and safety management system to prevent user falls. is to provide.

One embodiment according to the present invention includes a light generating unit that generates light at predetermined time intervals, a light receiving unit that receives reflected light from which the light is reflected by an arbitrary object, and a light receiving unit that receives reflected light from the light generating unit based on the reflected light. A control unit that generates image information consisting of blue pixels, yellow pixels, red pixels, and black pixels according to the distance to the object, analyzes the image information and generates a danger signal, and location detection generates the user's coordinate information and speed information. A communication unit that transmits the image information, the danger signal, the coordinate information and the speed information, a vibration unit that receives the danger signal and generates vibration, a notification unit that receives the danger signal and generates an alarm sound, An air generating unit that receives a danger signal and supplies air to the belt tube, and energy in the light generating unit, the light receiving unit, the control unit, the position detection unit, the communication unit, the vibration unit, the notification unit, and the air generating unit. It is possible to provide a safety device that prevents user falls by recognizing the environment of the construction site, including the power supply unit.

In another embodiment according to the present invention, the image information includes continuous first image information, second image information, third image information, fourth image information, and fifth image information generated at the predetermined time interval. And, the control unit controls each of the blue pixel, the yellow pixel, and the red pixel included in the first image information, the second image information, the third image information, the fourth image information, and the fifth image information. And the danger signal may be generated based on the number of black pixels.

In another embodiment according to the present invention, the control unit generates the risk signal based on the risk, and the risk (R) can be calculated by the following [Equation 1].

[Formula 1]

Risk (R) = A × [Number of blue pixels] + B × [Number of yellow pixels] + C × [Number of red pixels] + D Weight that changes depending on the environment of the construction site where it is used) -

In another embodiment according to the present invention, the control unit selects the black pixel from each of the first image information, the second image information, the third image information, the fourth image information, and the fifth image information. The percentage of black pixels occupied can be calculated, and the above-described danger signal can be generated by comparing the first change rate calculated by [Equation 2] below and the second change rate calculated by [Equation 3] below.

[Formula 2]

First change rate = ((change rate of black pixel percentage of first image information and black pixel percentage of second image information) + (change rate of black pixel percentage of second image information and black pixel percentage of third image information) + (change rate of black pixel percentage of second image information and black pixel percentage of third image information) Black pixel percentage and fourth video information black pixel percentage change rate))/3,

[Formula 3]

Second rate of change = rate of change between the black pixel percentage of the fourth image information and the black pixel percentage of the fifth image information

A safety device that recognizes the environment at a construction site and prevents user falls.

In another embodiment according to the present invention, the light generating unit may generate the light 10° to 60° behind the user based on the direction of gravity.

In another embodiment according to the present invention, the belt tube surrounds the front of the user in an H shape and the back of the user in an When the position detection unit and the control unit are provided and the air is supplied to the belt tube, the air can be maintained in a filled state.

In another embodiment according to the present invention, the control unit may generate the danger signal when the user is located in a danger area based on the coordinate information.

In another embodiment according to the present invention, the control unit may generate the danger signal when the user moves at a predetermined speed or more based on the speed information.

In another embodiment according to the present invention, the power supply unit may include a secondary battery capable of charging and discharging.

In another embodiment according to the present invention, the communication unit may transmit the image information, the coordinate information, the speed information, and the danger signal to an integrated management server.

The safety device according to the present invention can prevent a fall accident from occurring due to a worker at height not recognizing the fall point due to work for a certain period of time and stepping backward, even though there is a fall area behind him.

Additionally, the safety device according to the present invention can prevent fall accidents by transmitting danger signals through vibration and sound when a worker is located in a dangerous area.

Furthermore, the safety device according to the present invention can update the construction site situation in real time and efficiently establish a process and safety management system.

Figure 1 is a conceptual diagram showing a safety device that recognizes the environment of a construction site and prevents a user's fall accident according to an embodiment of the present invention.
Figure 2 is a block diagram showing the internal configuration of a safety device that recognizes the environment of a construction site and prevents a user's fall accident according to an embodiment of the present invention.
Figure 3 is a block diagram showing the internal configuration of a safety device that recognizes the environment of a construction site and prevents a user's fall accident according to an embodiment of the present invention.
Figure 4 shows image information generated by a control unit based on reflected light according to an embodiment of the present invention.
Figure 5 is an exemplary diagram showing the angle at which the light generating unit generates light according to an embodiment of the present invention.
Figure 6 shows a situation where a danger signal is generated according to the user's movement according to an embodiment of the present invention.
Figure 7 shows a belt tube according to an embodiment of the present invention.

In this specification, various embodiments will be described to aid understanding of the present invention.

The terms “component,” “module,” “system,” “server (advertising management server) or terminal (user terminal, advertiser terminal)” used in this specification refer to computer-related entities, hardware, firmware, software, software and hardware. refers to a combination of, or execution of software. For example, a component may be, but is not limited to, a process running on a processor, a processor, an object, a thread of execution, a program, and/or a computer. For example, both an application running on a computing device and the computing device can be a component. One or more components may reside within a processor and/or thread of execution. A component may be localized within one computer. A component may be distributed between two or more computers. Additionally, these components can execute from various computer-readable media having various data structures stored thereon. Components may transmit signals, for example, with one or more data packets (e.g., data and/or signals from one component interacting with other components in a local system, a distributed system, to other systems and over a network such as the Internet). Depending on the data being transmitted, they may communicate through local and/or remote processes.

The term “or” is intended to mean an inclusive “or” rather than an exclusive “or.” That is, unless otherwise specified or clear from context, “X utilizes A or B” is defined to mean one of the natural implicit substitutions. That is, if X uses A, X uses B, or X uses both A and B, “X uses A or B” can apply to either of these cases. Additionally, the term “and/or” as used herein refers to and includes all possible combinations of one or more of the related listed items.

The terms “comprise” and/or “comprising” mean that the relevant feature and/or element is present. However, the terms “including” and/or “comprising” should be construed as not excluding the presence or addition of one or more other features, elements and/or groups thereof. Additionally, unless otherwise specified or the context is clear to indicate a singular form, the singular terms herein and in the claims should generally be construed to mean “one or more.”

Those skilled in the art will additionally appreciate that the various illustrative logical blocks, components, modules, circuits, means, logic, and algorithm steps described in connection with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or combinations of both. It can be implemented. To clearly illustrate the interchangeability of hardware and software, various illustrative components, blocks, configurations, means, logic, modules, circuits and steps (execution sequence) are described generally in terms of their functionality. explained above. Whether such functionality is implemented as hardware or software depends on the specific application and command knowledge imposed on the overall system. A skilled technician can implement the described functionality in a variety of ways for each specific application.

The description of the presented embodiments is provided to enable anyone skilled in the art to use or practice the present invention. Various modifications to these embodiments will be apparent to those skilled in the art. The general principles defined herein may be applied to other embodiments without departing from the scope of the invention. The present invention is not limited to the embodiments presented herein. The present invention is to be interpreted in the broadest scope consistent with the principles and novel features presented herein.

In one embodiment of the present invention, the server may include other components for performing the server environment. A server can include any form or device. A server is a digital device, such as a laptop computer, notebook computer, desktop, computer, web pad, or mobile phone, which is equipped with a processor and has computing power with memory. The server may be a web server that processes the service. The types of servers described above are merely examples and the present invention is not limited thereto.

Figure 1 is a conceptual diagram showing a safety device that recognizes the environment of a construction site and prevents a user's fall accident according to an embodiment of the present invention.

Referring to FIG. 1, the safety device 100 according to an embodiment of the present invention generates light at predetermined time intervals and can receive reflected light reflected from an arbitrary object. Through reflected light, image information consisting of blue pixels, yellow pixels, red pixels, and black pixels can be generated. Here, blue pixels, yellow pixels, red pixels, and black pixels may be pixels classified according to the distance to the object. For example, reflected light reflected at a short distance from the safety device 100 of the present invention may be displayed as blue pixels. Additionally, reflected light reflected from a long distance from the safety device 100 of the present invention can be displayed as black pixels. Whether the distance is close or far can be set differently depending on the environment of the construction site where the safety device 100 of the present invention is used. In one embodiment, when the distance displayed as a black pixel is 2.0 m or more, the distance displayed as a red pixel is 1.5 m or more and less than 2.0 m, the distance displayed as a yellow pixel is 1.0 m or more and less than 1.5 m, and the distance displayed as a blue pixel is 1.0 m or more and less than 1.5 m. The displayed distance can be set to less than 1.0m.

The safety device 100 according to the present invention is to prevent an accident in which a user (U) falls while stepping backwards at a construction site, and is located at a distance of about 2.0 m from the user (U) at a risk of falling (for example, where the scaffolding ends). , the end of the handrail) and generates a danger signal. However, the distance displayed as blue pixel, yellow pixel, red pixel, and black pixel according to an embodiment of the present invention is not limited to a specific number, and can be changed in various ways depending on the environment of the construction site. If there is a risk of falling within 2m behind the user (U) at a construction site, the user (U) can be protected from the risk of falling if such a dangerous situation is known in advance.

The safety device 100 according to the present invention generates coordinate information and speed information of the user (U), checks whether the user (U) is located in a dangerous area or moves at an abnormal speed compared to the normal speed, and generates a danger signal. You can. Based on the generated danger signal, vibration or an alarm sound can be transmitted to the user (U). In addition, if the user (U) is expected to fall, the belt tube 200 can be used to alleviate the shock caused by the fall. Furthermore, the safety device 100 according to the present invention can transmit image information, danger signals, coordinate information, and speed information to an integrated management server (not shown) that manages the construction site through a communication network. Through this, it is possible to check whether the user (U) wearing the safety device 100 according to the present invention is in a dangerous area or whether a fall accident has occurred, and immediate response is possible using the danger signal. The safety device 100 according to the present invention is equipped with a secondary battery capable of charging and discharging, and can generate and transmit image information, danger signals, coordinate information, and speed information without separate energy supply during work at a construction site.

Figures 2 and 3 are block diagrams showing the internal configuration of a safety device that recognizes the environment of a construction site and prevents a user's fall accident according to an embodiment of the present invention.

Referring to Figures 2 and 3, the safety device 100 according to the present invention includes a light generating unit 110, a light receiving unit 120, a control unit 130, a position detection unit 140, a communication unit 150, and a power unit. It may include (160). Additionally, the safety device 100 according to the present invention may include a vibration unit 170, a notification unit 180, and an air generator 190.

When the safety device 100 according to the present invention is worn by a user (U) working at a construction site, the light generating unit 110, the light receiving unit 120, the control unit 130, and the position detection unit ( 140), the communication unit 150 and the power unit 160 can be configured as one module, and the vibration unit 170, notification unit 180, and air generator 190 located on the shoulder can be configured as another module. there is. In general, it is effective to provide the vibrating unit 170 and the notification unit 180, which send an alarm signal to the user (U), on the shoulder, and include the light generating unit 110, the light receiving unit 120, the control unit 130, The position detection unit 140, communication unit 150, and power unit 160 are preferably located on the back of the user (U) in order to perform distance measurement and calculation functions. In addition, the air generated from the air generator 190 must first protect the head of the user (U), so it is preferable to be provided at the shoulder area.

The light generator 110 may generate light at predetermined time intervals. The light used in the light generator 110 can be any light that is not recognized by the human eye. Usually, it is sufficient to use light with a visible light wavelength (750 nm) or higher. The light generating unit 110 according to the present invention preferably uses light of 900 nm to 1,500 nm. Specifically, when light of 900 nm to 1000 nm is used, the price of the light generator 110 can be reduced and power consumption is low. In addition, it has a low water absorption capacity, so it can be relatively less affected by moisture in the air. However, since noise between 900 nm and 1,000 nm may occur due to sunlight, the wavelength of light used may change depending on the usage environment at the construction site. In addition, when using light of 1,000 nm to 1,500 nm, it does not damage the user's (U) eyesight and relatively does not cause noise due to sunlight, but there may be a unit cost burden for mass production and power consumption is high. It may be difficult to use for a long time because it is high.

The light generated by the light generating unit 110 may be reflected by objects located around the user U and received by the light receiving unit 120. The light generator 110 may generate light at predetermined time intervals. In one embodiment, the light generator 110 may generate light once per 1 ms. In another embodiment, the light generator 110 may generate light once every 2 ms. In another embodiment, the light generator 110 may generate light once every 3 ms. In another embodiment, the light generator 110 may generate light once every 4 ms. When the light generating unit 110 generates light once per 1 ms, the light receiving unit 120 can receive reflected light once per 1 ms. When the light generator 110 generates light once every 2ms, the light receiver 120 can receive reflected light once every 2ms. When the light generator 110 generates light once every 3 ms, the light receiver 120 can receive reflected light once every 3 ms. When the light generator 110 generates light once every 4 ms, the light receiver 120 can receive reflected light once every 4 ms. The safety device 100 according to the present invention generates image information using reflected light, so when light is generated once per ms, image information can be generated at one frame per ms. When image information is generated at a frame rate of 1 ms, the environment of the construction site where the user (U) works can be accurately recognized, but there is a disadvantage of using an expensive power supply unit 160 due to excessive data processing and energy consumption. Therefore, it is desirable for the safety device 100 according to an embodiment of the present invention to generate image information at a rate of one frame every 4 ms, but in the present invention, the time interval for the light generation unit 110 to generate light is limited to 4 ms. It's not like that. If the user (U) is falling from a height where injury may occur to the user (U), it is desirable that the frame generation time interval to recognize the fall is set to 4 ms. However, considering product specifications and unit price, light can be generated in a wide range from 1 ms to 100 ms, and corresponding image information can be generated.

The light receiving unit 120 may receive reflected light generated by the light generating unit 110 and reflected by an arbitrary object. In one embodiment, the light receiving unit 120 may use a photo diode, photo transistor, photo IC, CDS, CCD image sensor, etc., but the scope of the present invention is not limited to a specific light sensor.

Figure 4 shows image information generated by a control unit based on reflected light according to an embodiment of the present invention.

Referring to FIG. 4, the control unit 130 can generate image information consisting of blue pixels, yellow pixels, red pixels, and black pixels according to the distance to an arbitrary object based on reflected light, and analyzes the image information to determine risk. A signal can be generated.

The image information in FIG. 4 shows a VGA resolution of 640 x 480, but the image information according to the present invention may have various resolutions. For example, video information includes OVGA (320 x 240), VGA (640 x 480), SD (720 x 480), It may have a resolution of (2048 x 1536), but the image information of the present invention is not limited to a specific resolution. For example, if image information according to the present invention has VGA (640 x 480) resolution, it may have 307,200 pixels. Each of the 307,200 pixels can be displayed as a blue pixel, yellow pixel, red pixel, or black pixel.

As explained above, the part marked with blue pixels indicates that there is a random object at a closer distance from the user (U), and the part marked with yellow pixels indicates that there is a random object at a relatively greater distance than the part marked with blue pixels. . Furthermore, the part marked with red pixels indicates that there is a random object at a relatively greater distance than the part marked with yellow pixels. If the part displayed as a black pixel is set to a distance of 2 m or more from the user (U), the part displayed as a black pixel in the image information may indicate that there is no object within a distance of 2 m from the user (U). In particular, the safety device 100 according to the present invention mainly detects the lower rear of the user (U), so it is possible to check whether there is an arbitrary object (mainly a scaffold at a construction site) below the rear, and black pixels that occupy the image information are possible. It can be used as basic data to generate a risk signal by considering the number or ratio of.

Here, when the angle of light generated by the light generator 110 is 10° to 60° behind the user (U) based on the direction of gravity, information about the environment where the worker's foothold is located at the construction site is provided. It can be secured. In particular, at construction sites, workers often fall without being aware of the presence of scaffolding while stepping back, so the safety device 100 according to the present invention detects the end of the scaffolding or the part where the scaffolding is not installed at an appropriate time. If you are informed, you can prevent accidents due to falls in advance.

Figure 5 is an exemplary diagram showing the angle at which the light generating unit generates light according to an embodiment of the present invention.

Referring to FIG. 5, while the user (U) is working at height, the light generator 110 according to the present invention generates light at 10° to 60° in the rear direction of the user (U) with respect to the direction of gravity. And image information about the rear and sides of the user (U) can be secured. Considering the height of the user (U) and the location where the safety device 100 according to the present invention is installed, it is located at a height of 1 m from the scaffolding at the construction site and image information around 60° rearward can be secured. In Figure 5, since the footrest ends around 60° posterior to the user (U), part of the image information may be displayed as black pixels.

Figure 6 shows a situation where a danger signal is generated according to the user's movement according to an embodiment of the present invention.

Referring to FIG. 6, since a foothold is detected near 60° behind the user (U) in (a) of FIG. 6, construction work is possible in a safe situation. In Figure 6 (b), the footrest is not detected around 45° to 60° to the rear of the user (U), so an alarm sound can be delivered to the user (U). In Figure 6 (c), the footrest is not detected around 10° to 60° posterior to the user (U), so a vibration signal and an alarm sound can be transmitted to the user (U). In Figure 6 (d), the footrest is not detected around 10° to 60° posterior to the user (U), the position of the user (U) (especially height information) changes rapidly, and the speed of the user (U) changes rapidly. If there is a sudden change, a danger signal can be transmitted to the air generator 190 to supply air to the belt tube 200.

Image information according to the present invention can be stored at predetermined time intervals. Although not shown in FIG. 2, the safety device 100 according to the present invention may be equipped with a memory, and the control unit 130 may analyze a plurality of image information and store it in the memory. In one embodiment, the memory may be ROM, RAM, magnetic disk storage medium, optical storage medium, or flash memory device, but is not limited thereto. For example, when one image information is generated every 4ms, a total of 5 pieces of image information can be generated for 20ms. For convenience of explanation, the image information generated at t seconds is first image information, the image information created at t+4 ms seconds is second image information, and the image information generated at t+8 ms seconds is third image information, t If the image information generated at +16 ms seconds is referred to as fourth image information and the image information generated at t+20 ms seconds is referred to as fifth image information, five pieces of image information can be stored in the memory.

The control unit 130 generates a danger signal based on the numbers of blue pixels, yellow pixels, red pixels, and black pixels included in the first image information, second image information, third image information, fourth image information, and fifth image information. can occur. Hereinafter, the description will be made assuming that the resolution of the image information is 100×100. If the resolution of image information is 100×100, a total of 10,000 pixels can be created. The number of blue pixels, yellow pixels, red pixels, and black pixels according to time is summarized in [Table 1] below.

designation point of view blue pixel yellow pixel red pixel black pixel pixel total red flag First video information t 7,542 1,985 473 0 10,000 - Second video information t+4ms 5,321 2,694 1,927 58 10,000 - Third video information t+8ms 850 1,356 7,105 689 10,000 - 4th video information t+16ms 76 1,789 2,504 5,631 10,000 generation 5th video information t+20ms 0 354 715 8,931 10,000 generation

When analyzing the first image information with reference to [Table 1] above, it can be seen that blue pixels and yellow pixels account for the majority, and that the environment has a footrest in the range of 10° to 60° behind the user (U). At this time, no danger signal is generated and the user (U) can proceed with work safely. It can be seen that the second image information is generated 4ms after the first image information is generated, and the number of blue pixels decreases and the number of yellow pixels increases. Although the number of yellow pixels and red pixels increased at t+4ms, it can be seen that the rear is not dangerous enough to raise a danger signal. The fourth image information contains significantly more red pixels and black pixels than blue pixels and yellow pixels. In particular, when the number of black pixels exceeds 5,000, it can be seen that there is no foothold in a nearby location. At this time, the control unit 130 may generate a danger signal, and this danger signal may generate an alarm sound through the notification unit 180 or vibrate the vibration unit 170 to alert the user (U). there is. At a construction site, the alarm sound from the notification unit 180 may not be transmitted to the user (U) due to excessive noise. In this case, the vibrating unit 170 provided on the shoulder of the user (U) generates vibration and the user (U) You can inform U) of the danger. Users (U) working at construction sites often work using their hands and shoulders, so they can easily feel the vibration occurring in the shoulder area, and can receive it more sensitively than transmitting vibration to other body parts. The fifth image information contains more red pixels and black pixels than blue pixels and yellow pixels. In particular, if the number of black pixels exceeds 8,000, it can be judged to be on the verge of crashing. In this case, in addition to simply generating an alarm sound or generating vibration, air can be supplied to the belt tube 200 to prepare for a situation in which the user (U) falls.

In another embodiment, the control unit 130 may generate a danger signal based on the risk (R) calculated by the following [Equation 1].

[Formula 1]

Risk (R) = A×[Number of blue pixels] + B×[Number of yellow pixels] + C×[Number of red pixels] + D×[Number of black pixels]

Here, A, B, C, and D may be weights that change depending on the environment of the construction site where the safety device 100 according to the present invention is used.

Referring to [Formula 1] above, the risk (R) can be determined as the sum of the number of blue pixels, the number of yellow pixels, the number of red pixels, and the number of black pixels. Furthermore, the risk (R) can be calculated by assigning weight to each of the number of blue pixels, yellow pixels, red pixels, and black pixels. The environment at a construction site is diverse, and the level of risk needs to be judged differently depending on the type of work being done. For example, even when work is performed at heights, the weight given to each pixel needs to be set differently when working in an open space on all sides and in a closed space.

When recalculated by applying weights to the image information obtained in [Table 1] above, the result is as shown in [Table 2] below. Here, the weights were A=0.1, B=1, C=3, and D=10.

designation point of view blue pixel yellow pixel red pixel black pixel Risk (R) red flag First video information t 754 1,985 1419 0 4,158 - Second video information t+4ms 532 2,694 1,927 580 5,733 - Third video information t+8ms 85 1,356 5,781 6,890 14,112 generation 4th video information t+16ms 7 1,789 7,512 56,310 65,618 generation 5th video information t+20ms 0 354 2,145 89,310 91,809 generation

Referring to [Table 2] above, the risk (R) of the first image information is 4,158, the risk (R) of the second image information is 5,733, the risk (R) of the third image information is 14,112, and the risk (R) of the third image information is 4,158. The risk (R) of the image information is 65,618, and the risk (R) of the fifth image information is 91,809. In [Table 2] above, the risk (R) is not a simple sum of the number of pixels, but the actual meaning of the number can be said to be the sum of the number of pixels. However, in the present invention, no unit is specifically attached to the risk (R) and only the size of the number is considered. If the critical point of the risk (R) is set to 10,000, a danger signal may occur in the third image information, fourth image information, and fifth image information. In another embodiment, when the critical point of the risk (R) is set to 30,000, a danger signal may occur only in the fourth image information and the fifth image information. The level to set the critical point of risk (R) can be determined differently depending on the environment of the construction site. Rather than generating a risk signal based solely on the number of black pixels, calculating the risk (R) by assigning weight to the number of blue pixels, yellow pixels, red pixels, and black pixels can reflect the environment of the construction site in detail. It works.

In another embodiment, the control unit 130 calculates the percentage of black pixels occupied by black pixels in each of the first image information, second image information, third image information, fourth image information, and fifth image information, and performs the following [ A risk signal can be generated by comparing the first change rate calculated by [Equation 2] and the second change rate calculated by [Equation 3] below.

[Formula 2]

First change rate = ((change rate of black pixel percentage of first image information and black pixel percentage of second image information) + (change rate of black pixel percentage of second image information and black pixel percentage of third image information) + (change rate of black pixel percentage of second image information and black pixel percentage of third image information) Black pixel percentage and fourth video information black pixel percentage change rate))/3

[Formula 3]

Second rate of change = rate of change of black pixel percentage of fourth image information and black pixel percentage of fifth image information

Referring to [Formula 2] above, the black pixel percentage of the first image information means the percentage of black pixels in the first image information. The black pixel percentage of the first image information is 0, the black pixel percentage of the second image information is 0.0058, the black pixel percentage of the third image information is 0.0689, the black pixel percentage of the fourth image information is 0.5631, and the black pixel percentage of the fifth image information is 0.5631. The percentage is 0.8931. If the predetermined time interval between the first image information and the second image information is set to 4ms, the change rate of the black pixel percentage of the first image information and the black pixel percentage of the second image information is (0.0058 - 0) / 0.004 = 1.45. Here, the unit is not particularly considered and only the size of the number is considered. The rate of change between the black pixel percentage of the second image information and the black pixel percentage of the third image information is (0.0689 - 0.0058) / 0.004 = 15.775. The change rate of the black pixel percentage of the third image information and the black pixel percentage of the fourth image information is (0.5631 - 0.0689) / 0.004 = 123.55. Substituting into [Equation 2] above, the first rate of change becomes (1.45 + 15.775 + 123.55)/3 = 46.925. According to [Formula 3] above, the second change rate = the change rate of the black pixel percentage of the fourth image information and the black pixel percentage of the fifth image information, so the second change rate is 82.5. Since the first rate of change is 46.925 and the second rate of change is 82.5, it can be seen that the user's (U) environment has rapidly become dangerous at t+20ms. At this time, the control unit 130 may generate a danger signal. The process of generating a risk signal by comparing the first rate of change and the second rate of change described above is summarized in [Table 3] below.

designation point of view Blue Pixel Percentage Yellow pixel percentage Red Pixel Percentage Black pixel percentage rate of change rate of change First video information t 0.7542 0.1985 0.0473 0 1.45 Second video information t+4ms 0.5321 0.2694 0.1927 0.0058 15.775 Third video information t+8ms 0.0850 0.1356 0.7105 0.0689 123.55 4th video information t+16ms 0.0076 0.1789 0.2504 0.5631 82.5 5th video information t+20ms 0 0.0354 0.0715 0.8931

The position detection unit 140 can generate coordinate information and speed information of the user (U). The location detection unit 140 according to the present invention can secure coordinate information of the user (U) through GPS (Global Positioning System). GPS location monitoring can be implemented in the baseband subsystem of the safety device 100 according to the present invention. By implementing the GPS positioning system within the baseband subsystem of the safety device 100, the GPS location fix of the safety device 100 can be obtained continuously or periodically on the safety device 100 without active participation of the application subsystem. You can. Additional location-related functions may be implemented in a baseband subsystem with built-in baseband GPS positioning functionality, enabling the additional location-related functions without significant increases in power consumption. The safety device 100 according to the present invention can use a baseband subsystem to check whether specific conditions are met by the current location of the safety device 100, and when it is confirmed that the specific conditions are met, the safety device 100 can be applied. The program subsystem can be selectively activated and specific location-related applications within the activated application subsystem can be selectively launched.

The control unit 130 may generate a danger signal when the user (U) is located in a danger area based on coordinate information. Here, the risk area may be an area where fall accidents frequently occur or an area where a fall accident may occur, and a specific area can be designated as a risk area by analyzing the location information of the user (U). If the user (U) moves to a specific area, a danger signal can be generated and delivered to the user (U).

The position detection unit 140 according to the present invention can secure speed information of the user (U) through an accelerometer. The accelerometer can detect movement including acceleration or deceleration of the safety device 100 according to the present invention. The accelerometer can generate multi-dimensional movement data that can be used to determine the direction of movement of the safety device 100. For example, the accelerometer may generate X, Y and Z axis acceleration information when it detects that the safety device 100 is moving. For example, the accelerometer may be a KGF01 accelerometer from Kionix or an ADXL311 accelerometer from Analog Devices.

The control unit 130 may generate a danger signal when the user (U) moves faster than a predetermined speed based on speed information. The predetermined speed may be set to be higher than the speed at which the user U usually moves, and in one embodiment, the speed measured due to the user U falling may be higher than the predetermined speed. The danger signal generated here may be transmitted to the vibration unit 170 and notification unit 180 provided in the safety device 100 worn by the user U, and may also be transmitted to the integrated management server. The integrated management server monitors whether the user (U) moves at a predetermined speed or higher and can transmit the fall location to the hospital server or the person in charge of safety management in the event of a fall accident.

The communication unit 150 according to an embodiment of the present invention can transmit image information, danger signals, coordinate information, and speed information through a wired communication network or a wireless communication network. Additionally, the communication unit 150 can transmit image information, coordinate information, speed information, and danger signals to the integrated management server. At this time, the communication network is GSM (Global System for Mobile Communication) network, GPRS (General Packet Radio Service) network, CDMA (Code Division Multiple Access) network, and EDGE (Enhanced Data Rates for GSM Evolution) network. Wireless communication is not limited to the following. Global System for Mobile Communications (GSM), Enhanced Date GSM Environment (EDGE), high-speed downlink packet access (HSDPA), and wide-area code division multiple access (W-CDMA) , code division multiple access (CDMA), time division multiple access (TDMA), Bluetooth, wireless fidelity (Wi-Fi) (e.g., IEEE 802.11a, IEEE 802.11b, IEEE 802.11g, and/or IEEE 802.11n), voice over IP (VoIP) over Internet Protocol), Wi-MAX, and protocols for email (e.g., Internet Message Access Protocol (IMAP) and/or Post Office Protocol (POP)) may be used.

The integrated management server can receive image information, coordinate information, speed information, and danger signals from the safety device 100 according to the present invention and monitor the situation at the construction site in real time. The integrated management server can check the location of the user (U) and transmit a danger signal to the user (U). Additionally, the integrated management server can determine a dangerous situation by checking the speed at which the user (U) moves. Furthermore, in the event of a fall accident, the falling location of the user (U) can be accurately confirmed.

The power supply unit 160 is preferably composed of a secondary battery capable of charging and discharging to ensure the user (U) can move freely at the construction site. For example, nickel cadmium (Ni-Cd) batteries, alkaline batteries, nickel hydrogen (Ni-Mh) batteries, sealed lead acid (SLA) batteries, lithium ion (Li-ion) batteries, and lithium polymer (Li-polymer) batteries. You can use it.

Figure 7 shows a belt tube according to an embodiment of the present invention.

Referring to Figure 7, the belt tube 200 according to an embodiment of the present invention can surround the front of the user (U) in an H shape and the back of the user (U) in an X shape. At the center of the ), a notification unit 180, and an air generator 190 may be provided. The belt tube 200 is provided with a certain space that can be filled with air, and maintains the shape shown in FIG. 1 when air is not supplied. When air is supplied to the belt tube 200 due to a dangerous situation, the chest, ribs, thighs, back, and shoulders of the user (U) inflate and remain filled with air. In particular, it can cover the entire face, preventing death from falls.

Those skilled in the art will understand that information and signals may be represented using any of a variety of different technologies and techniques. For example, data, instructions, commands, information, signals, bits, symbols and chips that may be referenced in the above description include voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields. It can be expressed by particles or particles, or any combination thereof. Those skilled in the art will understand that the various illustrative logical blocks, modules, processors, means, circuits and algorithm steps described in connection with the embodiments disclosed herein may be used in electronic hardware, in various forms. It will be understood that it may be implemented by a program or design code or a combination of both. To clearly illustrate this interoperability of hardware and software, various illustrative components, blocks, modules, circuits and steps have been described above generally with respect to their functionality. Whether this functionality is implemented as hardware or software depends on the specific application and design constraints imposed on the overall system. A person skilled in the art may implement the described functionality in a variety of ways for each specific application.

The various embodiments presented herein may be implemented as a method, device, or article of manufacture using standard programming and/or engineering techniques. The term “article of manufacture” includes a computer program or media accessible from any computer-readable device. For example, computer-readable media include magnetic storage devices (e.g., hard disks, floppy disks, magnetic strips, etc.), optical disks (e.g., CDs, DVDs, etc.), smart cards, and flash memory. Includes, but is not limited to, devices (e.g., EEPROM, cards, sticks, key drives, etc.). Additionally, various storage media presented herein include one or more devices and/or other machine-readable media for storing information.

The specific order or hierarchy of steps described herein are exemplary embodiments. Based on design priorities, the specific order or hierarchy of steps in the processes may be rearranged within the scope of the present invention. The method claims herein present elements of the various steps in a sample order but are not meant to be limited to the specific order or hierarchy presented.

The description of the embodiments described herein is provided to enable anyone skilled in the art to use or practice the present invention. Various modifications to these embodiments will be apparent to those skilled in the art. The general principles defined herein may be applied to other embodiments without departing from the scope of the invention. And the present invention is not limited to the embodiments presented herein, but should be construed in the broadest scope consistent with the principles and novel features presented herein.

U: user
100: Safety device that recognizes the environment of the construction site and prevents users from falling accidents
110: light generating unit 120: light receiving unit
130: Control unit 140: Position detection unit
150: Communication unit 160: Power unit
170: Vibration unit 180: Notification unit
190: Air generator 200: Belt tube

Claims (10)

A light generator that generates light at predetermined time intervals;
a light receiving unit that receives reflected light reflected from an object;
A control unit that generates image information consisting of blue pixels, yellow pixels, red pixels, and black pixels based on the reflected light according to the distance from the light generator to the arbitrary object, and analyzes the image information to generate a danger signal. ;
A position detection unit that generates user coordinate information and speed information;
a communication unit transmitting the image information, the danger signal, the coordinate information, and the speed information;
A vibration unit that receives the danger signal and generates vibration;
a notification unit that receives the danger signal and generates an alarm sound;
an air generator that receives the danger signal and supplies air to the belt tube; and
A power supply unit that supplies energy to the light generating unit, the light receiving unit, the control unit, the position detection unit, the communication unit, the vibration unit, the notification unit, and the air generating unit; including,
A safety device that recognizes the environment at a construction site and prevents user falls. According to paragraph 1,
The image information includes continuous first image information, second image information, third image information, fourth image information, and fifth image information generated at the predetermined time interval,
The control unit,
Of each of the blue pixel, the yellow pixel, the red pixel, and the black pixel included in the first image information, the second image information, the third image information, the fourth image information, and the fifth image information. Characterized in generating the above-mentioned danger signal based on the number,
A safety device that recognizes the environment at a construction site and prevents user falls. According to paragraph 2,
The control unit,
The above risk signal is generated based on the risk level,
The risk (R) is characterized in that it is calculated by the following [Equation 1],
[Formula 1]
Risk (R) = A × [Number of blue pixels] + B × [Number of yellow pixels] + C × [Number of red pixels] + D Weight that changes depending on the environment of the construction site where it is used -
A safety device that recognizes the environment at a construction site and prevents user falls. According to paragraph 2,
The control unit,
Calculate the black pixel percentage occupied by the black pixel in each of the first image information, the second image information, the third image information, the fourth image information, and the fifth image information,
Characterized in generating the above-mentioned risk signal by comparing the first rate of change calculated by [Equation 2] below and the second rate of change calculated by [Equation 3] below,
[Formula 2]
First change rate = ((change rate of black pixel percentage of first image information and black pixel percentage of second image information) + (change rate of black pixel percentage of second image information and black pixel percentage of third image information) + (change rate of black pixel percentage of second image information and black pixel percentage of third image information) Black pixel percentage and fourth video information black pixel percentage change rate))/3,
[Formula 3]
Second rate of change = rate of change between the black pixel percentage of the fourth image information and the black pixel percentage of the fifth image information
A safety device that recognizes the environment at a construction site and prevents user falls. According to paragraph 1,
The light generating unit,
Characterized in generating the light 10° to 60° behind the user based on the direction of gravity,
A safety device that recognizes the environment at a construction site and prevents user falls. According to paragraph 1,
The belt tube is,
Wrapping the front of the user in an H shape,
The back of the user is wrapped in an X shape,
The light generating unit, the light receiving unit, the position sensing unit, and the control unit are provided at the center of the
When the air is supplied to the belt tube, the air is maintained in a filled state.
A safety device that recognizes the environment at a construction site and prevents user falls. According to paragraph 1,
The control unit,
Characterized in generating the danger signal when the user is located in a danger area based on the coordinate information,
A safety device that recognizes the environment at a construction site and prevents user falls. According to paragraph 1,
The control unit,
Characterized in generating the danger signal when the user moves more than a predetermined speed based on the speed information,
A safety device that recognizes the environment at a construction site and prevents user falls. According to paragraph 1,
The power supply unit,
Including a secondary battery capable of charging and discharging,
A safety device that recognizes the environment at a construction site and prevents user falls. According to paragraph 1,
The Department of Communications,
Characterized in transmitting the image information, the coordinate information, the speed information, and the danger signal to an integrated management server,
A safety device that recognizes the environment at a construction site and prevents user falls.