Smart alarm system and method for preventing suffocation in confined spaces

Abstract

A smart alarm system and method for preventing suffocation in confined spaces are disclosed. A smart alarm system for preventing suffocation in confined spaces according to one embodiment includes a smart alarm device that outputs an alarm to control a worker's entry into the confined space according to the air conditions of the confined space, a confined space sensing unit that senses the air conditions of the confined space, and a control unit that determines whether a worker can enter the confined space based on the sensing data of the confined space sensing unit and applies a command necessary for the alarm operation of the smart alarm device.

Description

Technology Field

[0001] The present invention relates to a smart alarm system and method for preventing suffocation during work in confined spaces, and more specifically, to a smart alarm system and method for preventing suffocation during work in confined spaces that can enhance work safety by quickly and accurately determining whether a worker can enter a confined space and notifying a worker who must enter the confined space of the internal situation in advance, and can prevent safety accidents of a worker during work by notifying a safety supervisor when the internal situation of the confined space changes. Background Technology

[0002] In the case of confined spaces, it is essential to verify safety in advance to prevent suffocation accidents among internal workers.

[0003] In other words, before a worker enters a confined space, safety must be verified in advance, including whether the space is filled with hazardous gases at dangerous levels and whether there is a leakage of hazardous gases into the space.

[0004] Furthermore, even if workers are allowed to enter confined spaces after safety inspections have been conducted to prevent suffocation accidents, various risk factors, such as the generation of hazardous gases and oxygen deficiency, remain ever-present during work. If the risk of suffocation within such confined spaces is not promptly identified, it can lead to serious safety accidents.

[0005] Recently, there was a problem with a Class A near miss caused by nitrogen during work in a confined space. During work in a confined space inside a manhole at the top of a blast furnace, the branch valve was closed, but the line entering through the top of the manifold chute was open. The gas detector of a worker who did not notice this was activated, but the worker continued the work, judging that the detector was triggering due to a small amount of carbon monoxide (CO) gas as usual. Consequently, there was a serious risk of short-term loss of consciousness due to oxygen deficiency caused by nitrogen within a few minutes.

[0006] Although safety monitors (e.g., lifeguards) are required to be stationed during work inside such confined spaces, there is a problem in that safety monitors observing the work from the outside have difficulty accurately perceiving the internal situation.

[0007] Generally, when performing work in a confined space, the gas conditions in the workplace can be detected using a large gas detector before the work begins. Afterward, the gas conditions can be monitored by placing a detector worn by the worker or a large gas detector inside the confined space. However, since nitrogen causes a worker to lose consciousness within seconds, a delay in rescue following a suffocation accident can lead to a dangerous situation resulting in death. Furthermore, there was a problem where the worker's anxiety increased because it was impossible to accurately determine whether it was safe to re-enter the confined space even when the worker briefly went outside to retrieve tools and then re-entered.

[0008] As a related prior art, there is Republic of Korea No. 10-2568617 (announced on August 16, 2023), and the said prior art discloses technology regarding a safety accident prevention and management system for a confined area. Prior art literature

[0009] Republic of Korea No. 10-2568617 The problem to be solved

[0010] The objective of the present invention is to provide a smart alarm system for preventing suffocation during work in confined spaces, which can enhance work safety by rapidly and accurately determining whether a worker can enter a confined space inside a manhole and notifying the worker who needs to enter the confined space in advance of whether entry is possible, and can prevent safety accidents of the worker by rapidly transmitting changes in the air conditions inside the confined space to a safety monitor outside the manhole.

[0011] Another objective of the present invention is to provide a smart alarm method for preventing suffocation in confined spaces that can ensure the safety of workers in confined spaces inside manholes and alleviate their anxiety by utilizing the above-described smart alarm system for preventing suffocation in confined spaces.

[0012] The objects of the present invention are not limited to those mentioned above, and other unmentioned objects and advantages of the present invention may be understood from the following description and will be more clearly understood by the embodiments of the present invention. Furthermore, it will be readily apparent that the objects and advantages of the present invention can be realized by the means and combinations thereof set forth in the claims. means of solving the problem

[0013] A smart alarm system for preventing suffocation in confined spaces according to one embodiment of the present invention comprises: a smart alarm device that outputs an alarm from outside the confined space to control entry into the confined space according to the air conditions of the confined space; a confined space sensing unit that senses the air conditions of the confined space; and a control unit that determines whether a worker can enter the confined space based on the sensing data of the confined space sensing unit and applies a command necessary for the alarm operation of the smart alarm device according to the determination result. The smart alarm device comprises a case located at the entrance of the confined space that prevents the intrusion of external dust and moisture, and a display that outputs an alarm text or a release text regarding whether a worker can enter the confined space according to the command of the control unit.

[0014] According to one embodiment, the smart alarm device comprises a cover plate connected to cover the open front of the case, a connecting base disposed on the upper part of the case, and a plurality of warning lights positioned to protrude vertically from the upper part of the connecting base and spaced apart from each other at a certain distance, capable of illuminating in different colors.

[0015] According to one embodiment, the smart alarm device can generate a different warning sound each time each of the plurality of warning lights is turned on.

[0016] According to one embodiment, the sealed space sensing unit includes an airflow sensing unit that senses the airflow amount inside the sealed space, and a nitrogen flow sensing unit that senses the nitrogen flow rate inside the sealed space.

[0017] According to one embodiment, the enclosed space sensing unit includes a CO sensing unit that senses CO inside a collection chute connected to the enclosed space, and an O2 sensing unit that senses O2 inside a collection chute connected to the enclosed space.

[0018] According to one embodiment, it is preferable that the airflow sensing unit, the nitrogen flow rate sensing unit, the CO sensing unit, and the O2 sensing unit do not determine the results by receiving analog values ​​from the smart alarm device, but rather, in the case of the CO sensing unit and the O2 sensing unit, operate by receiving digital contact signals through output contacts output from fixed and sensor-separated gas detection means installed at the site. Furthermore, in the case of the airflow sensing unit and the nitrogen flow rate sensing unit, it is preferable to operate by receiving digital output contact signals by programming signals received from one or more flow meters installed at the site into the DCS through preset interlock conditions. Here, DCS refers to a Distributed Control System, which is a system conventionally known as a system designed for industrial automation and process control. For example, the DCS may be configured to include conventionally known sensors, actuators, controllers, communication networks, databases, etc.

[0019] According to one embodiment, the smart alarm device includes a plurality of warning lights capable of being lit in different colors according to a command from the control unit, wherein the plurality of warning lights include a first warning light that is lit in orange when the airflow sensed by the airflow sense unit is less than 100 Nm3 / min and the nitrogen flow rate sensed by the nitrogen flow rate sense unit is 1 Nm3 / h or more, a second warning light that is lit in red when the CO inside the collection chute sensed by the CO sense unit is 30 ppm or more, and a third warning light that is lit in blue when the O2 inside the collection chute sensed by the O2 sense unit is less than 18% or 23.5% or more.

[0020] According to one embodiment, the smart alarm device may generate a first warning sound when the first warning light is illuminated in orange, generate a second warning sound when the second warning light is illuminated in red, and generate a third warning sound when the third warning light is illuminated in blue.

[0021] According to one embodiment, the display can output "No Entry" text in a flickering manner when the first warning light is lit in orange, and output "Safety First" text in a sliding manner when it is not lit.

[0022] According to one embodiment, the case may be made of stainless steel, and the entire externally exposed surface may be painted black.

[0023] According to one embodiment, the display may be located on the front of the case.

[0024] According to one embodiment, the display can output a "No Entry" text in a flickering manner when a worker cannot enter the enclosed space, and output a "Safety First" text in a sliding manner when a worker can enter the enclosed space.

[0025] According to one embodiment, the smart alarm device includes a hinge provided on one side of the case and the cover plate to horizontally rotate the cover plate toward the front of the case to open the interior of the case, and a locking device provided on the other side of the case and the cover plate to lock and unlock the cover plate by pressing it against the front of the case.

[0026] According to one embodiment, the hinge includes a first hinge located at the upper end of one side of the case and the cover plate, and a second hinge located at the lower end of one side of the case and the cover plate, and the locking device includes a first locking device located at the upper end of the other side of the case and the cover plate, and a second locking device located at the lower end of the other side of the case and the cover plate, wherein the first locking device is located at a height corresponding to the first hinge and the second locking device may be located at a height corresponding to the second hinge.

[0027] In addition, according to one embodiment of the present invention, a smart alarm method for preventing suffocation in confined spaces using a smart alarm system for preventing suffocation in confined spaces can be provided.

[0028] A smart alarm method for preventing suffocation in confined space work according to one embodiment includes the steps of sensing the airflow rate inside the confined space, sensing the nitrogen flow rate inside the confined space, sensing CO inside a collection chute connected to the confined space, and sensing O2 inside a collection chute connected to the confined space, and can control the entry of a worker into the confined space by using a first warning light that lights up orange when the sensed airflow rate is less than 100 Nm3 / min and the sensed nitrogen flow rate is 1 Nm3 / h or more, a second warning light that lights up red when the sensed CO is 30 ppm or more, and a third warning light that lights up blue when the sensed O2 is less than 18% or 23.5% or more.

[0029] According to one embodiment, when the first warning light is lit in orange, a first warning sound is generated, when the second warning light is lit in red, a second warning sound is generated, and when the third warning light is lit in blue, a third warning sound is generated, and the display can output "No Entry" text in a flicker manner when the first warning light is lit in orange, and output "Safety First" text in a sliding manner when it is not lit. Effects of the invention

[0030] According to the present invention, the air conditions inside a sealed space can be detected before a worker enters the sealed space inside a manhole, and the possibility of entering the sealed space can be determined quickly and accurately to notify the worker in advance. Furthermore, if the air conditions in the sealed space change during work, the situation can be quickly transmitted to a safety monitor outside the manhole to prevent safety accidents involving the worker during work.

[0031] In addition, according to the present invention, there is an advantage of ensuring the safety of workers performing work in a confined space inside a manhole, reducing the occurrence of disasters, and alleviating the worker's anxiety to increase work reliability.

[0032] In addition to the effects described above, the specific effects of the present invention are described together with the specific details for implementing the invention below. Brief explanation of the drawing

[0033] FIG. 1 is a simplified block diagram illustrating a smart alarm system for preventing suffocation in confined spaces according to one embodiment. FIG. 2 is a front view of a smart alarm device included in a smart alarm system for preventing suffocation during work in a confined space according to one embodiment. FIG. 3 is a plan view of a smart alarm device included in a smart alarm system for preventing suffocation during confined space work according to one embodiment. FIG. 4 is a right side view of a smart alarm device included in a smart alarm system for preventing suffocation during work in a confined space according to one embodiment. FIG. 5 is a left side view of a smart alarm device included in a smart alarm system for preventing suffocation during work in a confined space according to one embodiment. FIG. 6 is an example diagram of the operation of a smart alarm device included in a smart alarm system for preventing suffocation in confined spaces according to one embodiment. FIG. 7 is a block diagram illustrating the detailed configuration of a confined space sensing unit and a smart alarm device included in a smart alarm system for preventing suffocation during confined space work according to one embodiment. Specific details for implementing the invention

[0034] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings so that those skilled in the art can easily implement the invention. The present invention may be embodied in various different forms and is not limited to the embodiments described herein.

[0035] To clearly explain the present invention, parts unrelated to the description have been omitted, and the same reference numerals are assigned to identical or similar components throughout the specification. Furthermore, some embodiments of the present invention are described in detail with reference to the exemplary drawings. In assigning reference numerals to the components of each drawing, identical components may have the same reference numeral whenever possible, even if they are shown in different drawings. Additionally, in describing the present invention, if it is determined that a detailed description of related known components or functions could obscure the essence of the present invention, such detailed description may be omitted.

[0036] In describing the components of the present invention, terms such as first, second, A, B, (a), (b), etc., may be used. These terms are intended only to distinguish the components from other components, and the nature, order, sequence, or number of the components are not limited by these terms. Where it is stated that a component is "connected," "combined," or "connected" to another component, it should be understood that the component may be directly connected or connected to the other component, but that other components may be "interposed" between each component, or that each component may be "connected," "combined," or "connected" through other components.

[0037] In addition, for convenience of explanation in implementing the present invention, the components may be described in detail; however, these components may be implemented within a single device or module, or a single component may be divided and implemented across multiple devices or modules.

[0038] Hereinafter, a smart alarm system and method for preventing suffocation in confined spaces according to various embodiments will be described in detail with reference to the attached drawings.

[0039] In the drawings, FIG. 1 is a simplified block diagram illustrating a smart alarm system for preventing suffocation in confined spaces according to one embodiment; FIG. 2 is a front view of a smart alarm device included in a smart alarm system for preventing suffocation in confined spaces according to one embodiment; FIG. 3 is a plan view of a smart alarm device included in a smart alarm system for preventing suffocation in confined spaces according to one embodiment; FIG. 4 is a right side view of a smart alarm device included in a smart alarm system for preventing suffocation in confined spaces according to one embodiment; FIG. 5 is a left side view of a smart alarm device included in a smart alarm system for preventing suffocation in confined spaces according to one embodiment; FIG. 6 is an example diagram of the operation of a smart alarm device included in a smart alarm system for preventing suffocation in confined spaces according to one embodiment; and FIG. 7 is a block diagram illustrating the detailed configuration of a confined space sensing unit and a smart alarm device included in a smart alarm system for preventing suffocation in confined spaces according to one embodiment.

[0040] A smart alarm system (1) for preventing suffocation during work in confined spaces according to the illustrated embodiments quickly and accurately determines whether a worker can enter a confined space inside a manhole and notifies the worker who needs to enter the confined space in advance whether entry is possible. Accordingly, work safety can be improved.

[0041] In addition, the smart alarm system (1) for preventing suffocation in confined spaces according to the illustrated embodiments can quickly transmit to a safety observer (e.g., lifeguard, etc.) outside the manhole when the air conditions in the confined space inside the manhole change. Accordingly, safety accidents involving workers can be prevented in advance.

[0042] Referring to FIG. 1, a smart alarm system (1) for preventing suffocation in a confined space according to one embodiment may include a smart alarm device (10), a confined space sensing unit (20), and a control unit (30).

[0043] According to one embodiment, the smart alarm device (10) can output an alarm from outside the confined space to control the entry of a worker into the confined space according to the air conditions of the confined space (i.e., the confined space inside the manhole) that the worker must enter (see FIGS. 2 to 6).

[0044] According to one embodiment, the sealed space sensing unit (20) can detect, i.e., sense, the air condition of the sealed space.

[0045] According to one embodiment, the control unit (30) determines whether a worker can enter the confined space based on the sensing data detected by the confined space sensing unit (20), and can issue a command necessary for the alarm operation of the smart alarm device (10) according to the result of the determination.

[0046] According to a preferred embodiment, the smart alarm device (10) may include a case (11) and a display (13) (see FIGS. 2 to 6).

[0047] Referring to FIGS. 2 to 6, the case (11) can be located at the entrance of a sealed space (i.e., a sealed space inside a manhole).

[0048] The case (11) can be made of a structure and material that prevents external dust and moisture from penetrating into the interior.

[0049] The display (13) can output text for an alarm or text for release regarding whether a worker can enter a sealed space (i.e., a sealed space inside a manhole) according to the command of the control unit (30).

[0050] According to one embodiment, the display (13) can output an alarm text such as "No Entry" when a worker cannot enter the enclosed space (i.e., the enclosed space inside the manhole). Conversely, the display (13) can output an alarm release text such as "Safety First" when a worker can enter the enclosed space (i.e., the enclosed space inside the manhole) under normal conditions.

[0051] According to a preferred embodiment, the smart alarm device (10) may further include a cover plate (12) connected to cover the open front of the case (11) in addition to the case (11) and the display (13).

[0052] Additionally, according to a preferred embodiment, the smart alarm device (10) may further include a connection base (16) positioned on the upper part of the case (11). A plurality of warning lights (17) may further be provided on the upper part of the connection base (16).

[0053] According to one embodiment, a plurality of warning lights (17) may be positioned at a height that allows them to be easily seen with the naked eye from the outside by protruding a certain length in the upward direction of the case (11) (see FIG. 2 and FIG. 6).

[0054] Multiple warning lights (17) can be spaced apart from each other at regular intervals in the left and right directions. Accordingly, the lighting of multiple warning lights (17) can be easily distinguished visually from the outside.

[0055] In addition, each of the multiple warning lights (17) can be lit in a different color.

[0056] According to one embodiment, the smart alarm device (10) can generate different warning sounds each time a plurality of warning lights (17) are illuminated. Accordingly, the color of each warning light can be visually checked from the outside, and the corresponding alarm situation can be audibly determined through different warning sounds, allowing the air condition of the enclosed space to be easily checked quickly and accurately.

[0057] Referring to FIG. 7, a sealed space sensing unit (20) according to one embodiment may include an airflow sensing unit (21) and a nitrogen flow rate sensing unit (22). The airflow sensing unit (21) can detect the amount of air blowing (i.e., airflow) inside the sealed space. The nitrogen flow rate sensing unit (22) can detect the amount of nitrogen (N2) inside the sealed space.

[0058] Additionally, the enclosed space sensing unit (20) may further include a CO sensing unit (23) that senses CO inside a collection chute connected to the enclosed space, and an O2 sensing unit (24) that senses O2 inside a collection chute connected to the enclosed space.

[0059] According to a preferred embodiment, the airflow sensing unit (21), nitrogen flow rate sensing unit (22), CO sensing unit (23), and O2 sensing unit (24) may be configured to operate by receiving a digital contact signal through an output contact output from a fixed and sensor-separated gas detection means installed at the site, rather than receiving an analog value from the smart alarm device (10) and determining it internally.

[0060] In addition, in the case of air volume and nitrogen flow rate, signals received from one or more flow meters installed on-site into the DCS can be programmed through preset interlock conditions to receive Digital Output contact signals and be configured to operate.

[0061] Here, DCS refers to a Distributed Control System, which is a system conventionally known as a system designed for industrial automation and process control. For example, a DCS may be configured to include sensors, actuators, controllers, communication networks, etc. However, the present invention is not necessarily limited to the above configuration and may be implemented in various ways by appropriately modifying it with conventional configurations known to those skilled in the art.

[0062] According to one embodiment, a plurality of warning lights (17) may include a first warning light (171), a second warning light (172), and a third warning light (173).

[0063] The first warning light (171) can be lit in orange according to the command of the control unit (30) when the airflow rate sensed by the airflow sensing unit (21) is less than 100 Nm3 / min, and the nitrogen flow rate sensed by the nitrogen flow rate sensing unit (22) is 1 Nm3 / h or more.

[0064] The second warning light (172) can be lit in red according to the command of the control unit (30) when the CO (carbon monoxide) inside the collection chute sensed by the CO sensing unit (23) has a condition of 30 ppm or more.

[0065] The third warning light (173) can be lit in blue according to the command of the control unit (30) when the O2 (oxygen) inside the assembly chute sensed by the O2 sensing unit (24) is less than 18% or more than 23.5%.

[0066] According to one embodiment, the smart alarm device (10) can generate different warning sounds for each of the multiple warning lights (17).

[0067] When the first warning light (171) is lit up in orange, the smart alarm device (10) can generate (i.e., output) the first warning sound.

[0068] In addition, when the second warning light (172) is lit in red, a second warning sound different from the first warning sound can be generated (i.e., output).

[0069] Additionally, when the third warning light (173) is lit up in blue, it can generate (i.e., output) a third warning sound different from the first and second warning sounds.

[0070] In this way, the smart alarm device (10) can output different warning sounds corresponding to each situation, namely the first, second, and third warning sounds, when the first, second, and third warning lights (171, 172, 173) are turned on. To this end, the smart alarm device (10) may further include a speaker (not shown) for outputting warning sounds.

[0071] Meanwhile, the display (13) can output the text "No Entry" in a flicker manner (i.e., a method of driving the text to blink) when the first warning light (171) is lit in orange.

[0072] In contrast, the display (13) can normally output the text "Safety First" in a sliding manner (i.e., the text moves from left to right (or right to left)).

[0073] According to a preferred embodiment, the case (11) may be made of stainless steel.

[0074] And the outer surface of the case (11), that is, the entire surface exposed to the outside, can be painted black.

[0075] Accordingly, corrosion of the case (11) can be prevented, and external dust and moisture can not penetrate into the interior, so it can have a waterproof and dustproof structure, and glare caused by sunlight reflection is prevented by the black coating treatment of the case (11), so text on the LED display (13) can be easily identified with the naked eye.

[0076] According to one embodiment, the display (13) may be located on the front of the case (11).

[0077] As described above, the display (13) can output "No Entry" text in a flickering manner when a worker cannot enter the enclosed space, and can output "Safety First" text in a sliding manner when a worker can enter the enclosed space.

[0078] In addition, a smart alarm device (10) according to one embodiment may further include a hinge (14) and a locking device (15) (see FIGS. 2 to 5).

[0079] A hinge (14) may be provided on one side where the case (11) and the cover plate (12) are connected. The hinge (14) may be provided to horizontally rotate the cover plate (12) toward the front of the case (11) to open the interior of the case (11) when necessary.

[0080] A locking device (15) may be provided on the other side where the case (11) and the cover plate (12) are connected. The locking device (15) may be provided to lock and secure the cover plate (12) by pressing it against the front of the case (11) or to unlock it when necessary.

[0081] According to one embodiment, the hinge (14) may include a first hinge (141) located at the upper side of the case (11) and the cover plate (12), and a second hinge (142) located at the lower side of the case (11) and the cover plate (12).

[0082] According to one embodiment, the locking device (15) may include a first locking device (151) located at the upper side of the case (11) and the cover plate (12), and a second locking device (152) located at the lower side of the case (11) and the cover plate (12). Preferably, the first locking device (151) is located at a height corresponding to the first hinge (141) to strongly lock and secure the case (11) and the cover plate (12) together, and the second locking device (152) is located at a height corresponding to the second hinge (142) to strongly lock and secure the case (11) and the cover plate (12) together at a height different from that of the first locking device (151). Accordingly, the waterproof and dustproof performance of the case (11) can be improved by the first and second locking devices (151, 152).

[0083] Next, a smart alarm method for preventing suffocation during work in a confined space according to one embodiment of the present invention may include the steps of sensing the airflow rate inside the confined space, sensing the nitrogen flow rate inside the confined space, sensing CO inside a collection chute connected to the confined space, and sensing O2 inside a collection chute connected to the confined space.

[0084] At this time, when the sensed airflow is less than 100 Nm3 / min and the sensed nitrogen flow rate is 1 Nm3 / h or more, the first warning light (171) is lit in orange, when the sensed CO is 30 ppm or more, the second warning light (172) is lit in red, and when the sensed O2 is less than 18% or 23.5% or more, the third warning light (173) is lit in blue (see FIG. 6). Accordingly, the entry of a worker into the confined space can be controlled, and suffocation accidents of a worker can be prevented when working inside the confined space.

[0085] According to one embodiment, when the first warning light (171) is lit in orange, a first warning sound is generated, when the second warning light (172) is lit in red, a second warning sound is generated, and when the third warning light (173) is lit in blue, a third warning sound is generated. Additionally, when the first warning light (171) is lit in orange, the display (13) can output "No Entry" text in a flickering manner. In contrast, when normal, that is, when a worker can enter the enclosed space, the display (13) can output "Safety First" text (not shown) in a sliding manner.

[0086] Although not separately described, the smart alarm device (10) is equipped with a power supply unit (not shown), and the warning light (17) can be operated with AC 220V power, and the relay and display (13) can be operated through a DC Power Supply. However, it is not necessarily limited to this, and any other conventional power supply method can be used without restriction.

[0087] Meanwhile, the airflow sensing unit (21) is a sensor that senses the amount of airflow inside a sealed space, and the reason the airflow sensing unit (21) that senses the amount of airflow is included in the sealed space sensing unit (20) is to prevent the alarm from operating during normal operation.

[0088] As described above, according to the configuration and operation of the present invention, the air conditions inside the sealed space are detected before a worker enters the sealed space inside a manhole, and the possibility of entering the sealed space is determined quickly and accurately, and the worker is notified in advance.

[0089] In addition, if the air conditions in a confined space change during work, the situation can be promptly communicated to a safety supervisor outside the manhole, thereby preventing safety accidents involving the worker.

[0090] In addition, it can promote the safety of workers performing tasks in confined spaces inside manholes, reduce the occurrence of disasters, and enhance work reliability by alleviating worker anxiety.

[0091] Although the present invention has been described above with reference to the illustrated drawings, the present invention is not limited by the embodiments and drawings disclosed in this specification, and it is obvious that various modifications can be made by a person skilled in the art within the scope of the technical concept of the present invention. Furthermore, even if the effects of the configuration of the present invention were not explicitly described while describing the embodiments of the present invention above, it is natural to acknowledge that the effects predictable by said configuration should also be recognized. Explanation of the symbols

[0092] 1: Smart alarm system for preventing suffocation in confined spaces 10: Smart Alarm Device 11: Case 12: Cover plate 13: Display 14: Hinge 141: First hinge 142: Second hinge 15: Locking device 151: First locking device 152: Second locking device 16: Connection Base 17: Flashing light 171: First warning light 172: Second warning light 173: 3rd Warning Light 20: Closed space sensing unit 21: Airflow sensing unit 22: Nitrogen flow sensing unit 23: CO Sensing Unit 24: O2 Sensing Unit 30: Control unit

Claims

Claim 1 A smart alarm system for preventing suffocation in confined spaces, comprising: a smart alarm device that outputs an alarm to control a worker's entry into the confined space according to the air conditions of the confined space; a confined space sensing unit that senses the air conditions of the confined space; and a control unit that determines whether a worker can enter the confined space based on the sensing data of the confined space sensing unit and applies commands necessary for the alarm operation of the smart alarm device; wherein the smart alarm device comprises: a case located at the entrance of the confined space that prevents dust and moisture penetration; and a display that outputs an alarm text or a release text regarding whether a worker can enter the confined space according to the commands of the control unit. Claim 2 A smart alarm system for preventing suffocation in confined spaces according to claim 1, wherein the smart alarm device comprises: a cover plate connected to cover the open front of the case; a connecting base disposed on the upper part of the case; and a plurality of warning lights positioned to protrude vertically from the upper part of the connecting base and spaced apart from each other at a certain distance, capable of illuminating in different colors. Claim 3 In paragraph 2, the smart alarm device is a smart alarm system for preventing suffocation in confined spaces, which generates a different warning sound each time each of the plurality of warning lights is turned on. Claim 4 A smart alarm system for preventing suffocation in confined spaces, comprising, in claim 1, a confined space sensing unit, a flow rate sensing unit for sensing the airflow rate inside the confined space; and a nitrogen flow rate sensing unit for sensing the nitrogen flow rate inside the confined space. Claim 5 In claim 4, the confined space sensing unit comprises: a CO sensing unit that senses CO inside a collection chute connected to the confined space; and an O2 sensing unit that senses O2 inside a collection chute connected to the confined space; a smart alarm system for preventing suffocation in confined space work. Claim 6 In claim 5, the smart alarm device comprises a plurality of warning lights capable of illuminating in different colors according to a command from the control unit, wherein the plurality of warning lights include: a first warning light that illuminates in orange when the airflow sensed by the airflow sensing unit is less than 100 Nm3 / min and the nitrogen flow rate sensed by the nitrogen flow rate sensing unit is 1 Nm3 / h or more; a second warning light that illuminates in red when the CO inside the assembly chute sensed by the CO sensing unit is 30 ppm or more; and a third warning light that illuminates in blue when the O2 inside the assembly chute sensed by the O2 sensing unit is less than 18% or 23.5% or more; a smart alarm system for preventing suffocation in confined space work. Claim 7 In claim 6, the smart alarm device generates a first warning sound when the first warning light is illuminated in orange, generates a second warning sound when the second warning light is illuminated in red, and generates a third warning sound when the third warning light is illuminated in blue, in a smart alarm system for preventing suffocation in confined spaces. Claim 8 In claim 6, the display outputs "No Entry" text in a flickering manner when the first warning light is illuminated in orange, and outputs "Safety First" text in a sliding manner when a worker can enter the confined space during normal times, a smart alarm system for preventing suffocation in confined space work. Claim 9 In claim 1, the case is made of stainless steel and has a black painted surface, a smart alarm system for preventing suffocation in confined spaces. Claim 10 In claim 1, the display is a smart alarm system for preventing suffocation in confined spaces, located on the front of the case. Claim 11 In claim 10, the above display outputs a "No Entry" text in a flickering manner when a worker cannot enter the said confined space, and outputs a "Safety First" text in a sliding manner when a worker can enter the said confined space, a smart alarm system for preventing suffocation in confined space work. Claim 12 A smart alarm system for preventing suffocation in confined spaces according to claim 1, wherein the smart alarm device comprises: a hinge provided on one side of the case and the cover plate and horizontally rotating the cover plate toward the front of the case to open the interior of the case; and a locking device provided on the other side of the case and the cover plate and locking and unlocking the cover plate by pressing it against the front of the case. Claim 13 In claim 12, the hinge comprises: a first hinge located at the upper end of one side of the case and the cover plate; and a second hinge located at the lower end of one side of the case and the cover plate; and the locking device comprises: a first locking device located at the upper end of the other side of the case and the cover plate; and a second locking device located at the lower end of the other side of the case and the cover plate; wherein the first locking device is located at a height corresponding to the first hinge, and the second locking device is located at a height corresponding to the second hinge, a smart alarm system for preventing suffocation in confined spaces. Claim 14 A smart alarm method for preventing suffocation in confined space work using a smart alarm system for preventing suffocation in confined space work according to any one of claims 1 to 13, comprising: a step of sensing the airflow rate inside the confined space; a step of sensing the nitrogen flow rate inside the confined space; a step of sensing CO inside a manifold chute connected to the confined space; and a step of sensing O2 inside a manifold chute connected to the confined space; wherein a first warning light is illuminated when the sensed airflow rate is less than 100 Nm3 / min and the sensed nitrogen flow rate is 1 Nm3 / h or more, a second warning light is illuminated when the sensed CO is 30 ppm or more, and a third warning light is illuminated when the sensed O2 is less than 18% or 23.5% or more. Claim 15 A smart alarm method for preventing suffocation in confined space work according to claim 14, wherein a first warning sound is generated when the first warning light is turned on, a second warning sound is generated when the second warning light is turned on, a third warning sound is generated when the third warning light is turned on, and the display outputs "No Entry" text in a flicker manner when the first warning light is turned on, and outputs "Safety First" text in a sliding manner when a worker can enter the confined space.

Images