Garage platform for new energy automobile based on fire extinguishing and preventing effects

Abstract

The invention discloses a new energy automobile garage platform based on fire extinguishing and preventing effects, and belongs to the technical field of new energy automobiles, the new energy automobile garage platform comprises a garage bottom plate and a garage top plate which are used for bearing an automobile body, a lifting assembly is installed in the middle of the garage top plate, and a fire-proof cover is installed at the bottom of the garage top plate and located below the lifting assembly; by means of the arrangement of the fireproof cover, surrounding vehicles are isolated, fire disasters are prevented from spreading rapidly, meanwhile, the interior of the fireproof cover actively controls and blocks continuous combustion conditions, the spontaneous combustion speed of the vehicles is delayed, the combustion scale and intensity of the vehicles are reduced to the maximum extent, and the fireproof cover can be used for preventing fire disasters from spreading rapidly. According to the invention, time is bought for disposal of professional fire-fighting institutions, development and spreading of fire disasters are slowed down, loss caused by disasters is reduced, multiple operation modes are adopted for starting, the starting operation mode is selected autonomously according to the actual use condition, the overall use effect of the device is effectively enriched, and the use requirements of personnel can be greatly met under different conditions.

Description

Technical Field

[0001] The present invention relates to the technical field of new energy vehicles, and specifically to a garage platform for new energy vehicles based on fire extinguishing and prevention effects. Background Art

[0002] With the rapid development of science and technology in our country, new energy vehicles have been rapidly popularized. Subsequently, new energy vehicle fire accidents occurring inside buildings have also frequently occurred. The frequent occurrence of new energy vehicle fires can be mainly attributed to unreasonable design of in-vehicle power battery systems, failure of battery management systems, charging equipment failures, line short circuits, etc. When a power battery catches fire, the combustion temperature is higher than that of ordinary fires, the combustion speed is faster, and it is difficult to extinguish with traditional fire-fighting methods. At the same time, due to differences in combustion characteristics among different systems of power batteries, and the current new energy vehicle power battery fires are complex fires mainly composed of gas fires, combustion can also occur even in a low-oxygen environment;

[0003] Compared with outdoor roads or open spaces, new energy vehicle fires inside buildings are more complex and difficult in terms of personnel evacuation, fire-fighting resource acquisition, control of fire spread, disposal of toxic smoke, collateral losses of the fire situation, and fire-fighting and rescue difficulties because they occur in specific areas;

[0004] Underground garages are often located on the lowest floor of a building, with a relatively enclosed space, making it difficult for personnel to evacuate and for rescue operations. The unfamiliar structure and complex layout pose obstacles to fire-fighting operations, which may delay the rescue progress. Moreover, the supply of fire-fighting materials and fire-fighting water sources equipped inside the building will definitely be greatly restricted compared to the outdoors. At the same time, vehicles are parked relatively densely inside the building's underground garage, and the surrounding of the burning vehicle is extremely vulnerable to the spread of the fire, resulting in the out-of-control spread of the fire situation. In addition, the ventilation conditions of the parking spaces inside the building are far inferior to those outdoors. If the ventilation and fire-fighting system cannot ensure the timely isolation or removal of the harmful smoke rapidly generated during a new energy vehicle fire, the harmful smoke released after the new energy vehicle power battery catches fire will quickly spread, not only increasing the difficulty of rescue and the danger to on-site personnel, but even triggering serious secondary disasters. Therefore, a garage platform for new energy vehicles based on fire extinguishing and prevention effects is proposed. Summary of the Invention

[0005] The purpose of the present invention is to provide a garage platform for new energy vehicles based on fire extinguishing and prevention effects to solve the problems raised in the above background art.

[0006] To achieve the above object, the present invention provides the following technical solution: A garage platform for a new energy vehicle based on fire extinguishing and prevention effects, including a garage floor and a garage roof for carrying the vehicle body. An elevating assembly is installed in the middle of the garage roof. A fireproof cover is installed under the garage roof and below the elevating assembly. A first pipe body and a second pipe body respectively penetrate through the top of the fireproof cover;

[0007] Among them, a plurality of support frames are installed in the fireproof cover. Reinforcing ribs are installed on adjacent sides of the plurality of support frames. A plurality of positioning rods are installed below the interior of the fireproof cover. A plurality of flexible pipes are installed around the plurality of support frames in the fireproof cover. A skirt is provided at the bottom of the fireproof cover;

[0008] Among them, a plurality of nozzles are installed on the first pipe body. The second pipe body is communicated with the plurality of flexible pipes.

[0009] As a further preference of this technical solution: The first pipe body is set to convey high-pressure fire-fighting water, and the second pipe body is used to convey perfluoroacetone fire extinguishing agent.

[0010] As a further preference of this technical solution: The support frame is arranged in a "mouth" shape and is horizontally installed in the fireproof cover. The reinforcing rib includes two support rods, and the two support rods are arranged in a staggered manner;

[0011] Among them, the middle parts of the two support rods are hinged by a pin shaft, and the two ends of the support rods are respectively hinged to the two support frames by a pin shaft. The above setting effectively guarantees the effect after the fireproof cover is unfolded.

[0012] As a further preference of this technical solution: Spray openings one are evenly opened on the flexible pipes. Spray openings two are evenly opened on the skirt, and the number of spray openings two is greater than the number of spray openings one. Each opened spray opening is used to spray perfluoroacetone fire extinguishing agent.

[0013] As a further preference of this technical solution: The inner lining of the fireproof cover includes a first fireproof layer and a second fireproof layer. The first fireproof layer is located inside the second fireproof layer. The plurality of flexible pipes are located on the adjacent sides of the first fireproof layer and the second fireproof layer. The first fireproof layer and the second fireproof layer are set to maintain the structural integrity of the fireproof cover under high temperature conditions, and the multi-layer composite structure can protect its internal folding metal skeleton and flexible pipeline under high temperature environment.

[0014] As a further preference of this technical solution: The first fireproof layer is a high-strength flame-retardant quartz fabric layer, and the second fireproof layer is made of alumina fiber blanket. The first fireproof layer made of high-strength flame-retardant quartz fabric layer can withstand a high temperature of up to 2500 °C, while the second fireproof layer made of alumina fiber blanket can resist high temperature up to 1600 °C.

[0015] As a further preference of this technical solution: The lifting assembly includes a winch and a plurality of guide wheels. The plurality of guide wheels are symmetrically installed at the bottom of the garage roof and are located on both sides of the fire shield. The winch provides driving force for the operation of the fire shield, and the plurality of guide wheels reduce the wear of the traction line during the operation of the fire shield and ensure that the fire shield does not deviate greatly when it is deployed or stored.

[0016] Among them, a traction line is installed on the output shaft of the winch. The traction line is respectively wound around a plurality of guide wheels, and the end of the traction line away from the winch is connected to the skirt. The traction line drives the fire shield under the action of the winch, and the above setting realizes the linkage of the winch operation to drive the fire shield.

[0017] As a further preference of this technical solution: The lifting assembly further includes a chain block. A connecting rod is installed on the chain block, and the chain block is connected to a plurality of guide wheels through the connecting rod. The lifting assembly is manually operated through the chain block.

[0018] As a further preference of this technical solution: A plurality of thermal infrared sensors, a plurality of smoke sensors and a plurality of monitoring devices are respectively installed at the bottom of the garage roof. The thermal infrared sensors convert thermal radiation information into electrical signals to realize the monitoring and analysis of the temperature of the target object. The smoke sensors detect the smoke particles or gas concentration in the environment. At the same time, the monitoring devices are used to collect, record and analyze the image, sound or data information in the environment in real time.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] 1. In the present invention, the fire shield provided can isolate surrounding vehicles and prevent the rapid spread of fire. At the same time, it actively controls inside, blocks the continuous combustion conditions, delays the self-ignition speed of the vehicle, and minimizes the combustion scale and intensity of the vehicle, striving for time for professional fire-fighting agencies to come for disposal, slowing down the development and spread of the fire, and reducing the losses caused by the disaster.

[0021] 2. In the present invention, the support frame provided ensures the strength of the fire shield after deployment, and the reinforcing ribs are used to connect with the support frame to ensure the frame stiffness and further improve the strength of the fire shield after deployment. Thus, the reinforcing and fixing support structure composed of the support frame and the reinforcing ribs ensures that it will not deform and fall apart when resisting the long-term combustion and explosion of the power battery.

[0022] 3. In the present invention, multiple operation modes (i.e., automatic operation start, on-site manual start, and manual mechanical operation under power failure) can be adopted to start the operation of the fire extinguishing cover. Thus, according to the actual use situation, the start operation mode can be independently selected, effectively enriching the overall use effect of the device. Furthermore, when facing different situations, it can greatly meet the use needs of personnel, and greatly improve the overall practicality and applicability of the device. Brief Description of the Drawings

[0023] Figure 1 It is a schematic diagram of the normal storage structure of a garage platform for new energy vehicles based on fire extinguishing and fire prevention effects of the present invention;

[0024] Figure 2 It is the first schematic diagram of the garage platform for new energy vehicles based on fire extinguishing and fire prevention effects of the present invention after expansion;

[0025] Figure 3 It is the second schematic diagram of the garage platform for new energy vehicles based on fire extinguishing and fire prevention effects of the present invention after expansion;

[0026] Figure 4 It is the third schematic diagram of the garage platform for new energy vehicles based on fire extinguishing and fire prevention effects of the present invention after expansion;

[0027] Figure 5 It is the first side view schematic diagram of the garage platform for new energy vehicles based on fire extinguishing and fire prevention effects of the present invention after expansion;

[0028] Figure 6 It is the second side view schematic diagram of the garage platform for new energy vehicles based on fire extinguishing and fire prevention effects of the present invention after expansion.

[0029] In the figure: 1, garage floor; 2, garage roof; 3, lifting assembly; 31, winch; 32, towing line; 33, guide wheel; 34, chain block; 4, fire shield; 41, support frame; 42, reinforcing rib; 43, positioning rod; 44, flexible pipe; 441, nozzle 1; 45, skirt; 451, nozzle 2; 46, fireproof layer 1; 47, fireproof layer 2; 5, pipe 1; 6, pipe 2; 7, nozzle; 8, thermal infrared sensor; 9, smoke sensor; 10, monitoring device. Detailed Description of the Invention

[0030] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention.

[0031] Embodiment 1

[0032] Please refer to Figures 1-6 , the present invention provides a technical solution: a garage platform for new energy vehicles based on fire extinguishing and fire prevention effects, including a garage floor 1 and a garage roof 2 for carrying the vehicle body. An elevator assembly 3 is installed in the middle of the garage roof 2, and a fire shield 4 is installed under the garage roof 2 and below the elevator assembly 3. Pipe 1 5 and pipe 2 6 respectively penetrate through the top of the fire shield 4;

[0033] Among them, a plurality of support frames 41 are installed inside the fireproof cover 4. Reinforcing ribs 42 are installed on one adjacent side of the plurality of support frames 41. A plurality of positioning rods 43 are installed below the interior of the fireproof cover 4. A plurality of flexible pipes 44 are installed inside the fireproof cover 4 and around the plurality of support frames 41. A skirt 45 is provided at the bottom of the fireproof cover 4;

[0034] Among them, a plurality of nozzles 7 are installed on the first pipe body 5, and the second pipe body 6 is communicated with the plurality of flexible pipes 44.

[0035] In this embodiment, specifically: the running lifting assembly 3 drives the fireproof cover 4 to cover the vehicle body, and the first pipe body 5 and the second pipe body 6 are respectively used to carry out fire prevention work on smoke or open fire. The provided support frame 41 is used to ensure the strength of the fireproof cover 4 after it is unfolded. At this time, with the provided reinforcing ribs 42, on the one hand, they are connected to the support frame 41, which can ensure the frame stiffness, and on the other hand, it can further improve the strength of the fireproof cover 4 after it is unfolded. At the same time, the provided positioning rods 43 are used to position the first nozzles 441 on the flexible pipes 44. The provided flexible pipes 44 can ensure the effect of the fireproof cover 4 during storage and unfolding through their own softness. At this time, the provided skirt 45 is used to play a role in sealing the internal space of the fireproof cover 4, thereby effectively preventing the overflow of smoke and fire-fighting water. It should be noted that if there are charging pile lines laid along the ground on the skirt 45, it can also fit the lines, making the vehicle in the parking space in a relatively airtight state to the greatest extent.

[0036] In this embodiment, specifically: the provided first pipe body 5 is used to transport high-pressure fire-fighting water, and the provided second pipe body 6 is used to transport perfluoroacetone fire extinguishing agent.

[0037] In this embodiment, specifically: the support frame 41 is arranged in a "mouth" shape and is horizontally installed inside the fireproof cover 4. The reinforcing rib 42 includes two support rods, and the two support rods are arranged in a staggered manner;

[0038] Among them, the middle parts of the two support rods are hinged by a pin shaft, and the two ends of the support rods are respectively hinged to the two support frames 41 by pin shafts. Through the above settings, the effect of the fireproof cover 4 after unfolding can be effectively ensured, that is, it can cover the vehicle body in an all-round and integral manner while having a certain stiffness.

[0039] In this embodiment, specifically: the first nozzles 441 are evenly arranged on the flexible pipes 44, and the second nozzles 451 are evenly arranged on the skirt 45, and the number of the second nozzles 451 is greater than the number of the first nozzles 441. Each of the opened nozzles is used to spray perfluoroacetone fire extinguishing agent. By setting the number of the second nozzles 451 to be greater than the number of the first nozzles 441, that is, a nozzle encryption area is set on the skirt 45, which is aimed at the situation that the power batteries of new energy vehicles are mostly arranged in the middle and rear parts of the vehicle chassis, and the engine compartment is more likely to have an overload fire of the electronic controller.

[0040] In this embodiment, specifically, the inner lining of the fireproof cover 4 includes a first fireproof layer 46 and a second fireproof layer 47. The first fireproof layer 46 is located inside the second fireproof layer 47. A plurality of flexible tubes 44 are located on the adjacent side of the first fireproof layer 46 and the second fireproof layer 47. By setting the first fireproof layer 46 and the second fireproof layer 47, the integrity of the structure of the fireproof cover 4 can be maintained under high temperature conditions. The multi-layer composite structure of the fireproof cover 4 can effectively protect the internal folded metal skeleton and flexible pipeline under high temperature environment.

[0041] In this embodiment, specifically, the first fireproof layer 46 is a high-strength flame-retardant quartz fabric layer, and the second fireproof layer 47 is made of alumina fiber blanket. The first fireproof layer 46 made of high-strength flame-retardant quartz fabric layer can reach a high temperature resistance of 2500 °C, while the second fireproof layer 47 made of alumina fiber blanket has a high temperature resistance of 1600 °C. Therefore, by setting the first fireproof layer 46 and the second fireproof layer 47, it can effectively prevent the flame and high temperature from eroding the internal structure of the fireproof cover 4, and has excellent heat insulation and ablation resistance performance, and can effectively isolate air and heat conduction.

[0042] Embodiment 2

[0043] A garage platform for new energy vehicles based on fire extinguishing and fire prevention effects. The lifting component 3 includes a winch 31 and a plurality of guide wheels 33. The plurality of guide wheels 33 are symmetrically installed at the bottom of the garage roof 2 and are located on both sides of the fireproof cover 4. The winch 31 is provided to provide driving force for the operation of the fireproof cover 4. By setting the plurality of guide wheels 33, on the one hand, it is used to reduce the wear of the traction line 32 during the operation of the fireproof cover 4, that is, to effectively reduce the friction between the guide wheel 33 and the traction line 32, and on the other hand, it is used to ensure that the fireproof cover 4 does not produce a large deviation when it is unfolded or stored.

[0044] Among them, a traction line 32 is installed on the output shaft of the winch 31. The traction line 32 is respectively wound around a plurality of guide wheels 33, and one end of the traction line 32 away from the winch 31 is connected to the skirt 45. The set traction line 32 is made of anti-rust steel strand. By setting the traction line 32, under the action of the winch 31, the fireproof cover 4 is driven. At the same time, by using the above settings, the winch 31 drives the fireproof cover 4 to unfold or store after operation.

[0045] In this embodiment, specifically, the lifting component 3 further includes a chain block 34. A connecting rod is installed on the chain block 34. The chain block 34 is connected to a plurality of guide wheels 33 through the connecting rod. The set chain block 34 is used to manually operate the lifting component 3, so as to prevent the situation that the fireproof cover 4 cannot be started and operated in case of power failure.

[0046] In this embodiment, specifically: a plurality of thermal infrared sensors 8, a plurality of smoke sensors 9 and a plurality of monitoring devices 10 are respectively installed at the bottom of the garage roof 2. The thermal infrared sensor 8 is used to convert the thermal radiation information into an electrical signal, so as to realize the monitoring and analysis of parameters such as the temperature, movement or gas concentration of the target object, and the smoke sensor 9 is used to detect the smoke particles or gas concentration in the environment, so as to monitor and trigger the alarm in real time, prevent the fire risk and enhance the safety protection capability. At the same time, the monitoring device 10 can adopt a monitoring camera or an industrial CCD, etc., and utilize the monitoring device 10 to collect, record and analyze the image, sound or data information in the environment in real time, so as to realize the comprehensive effect of safety protection, behavior management and risk warning, so as to enhance the controllability and transparency of the target scene.

[0047] In this embodiment, specifically: the monitoring device 10 is set to wirelessly transmit the collected images and information data to the monitoring background, and the monitoring images and data are displayed by the display in the monitoring background, so that when the fire is discovered in the early stage, the monitoring data is automatically collected to perform intelligent analysis on the fire status, and the corresponding mechanism is started to operate to carry out fire extinguishing and prevention work. At the same time, the black box provided in the monitoring data can be safely stored and replayed for a long time;

[0048] Among them, the above-mentioned settings can be used to carry out uninterrupted fire signal monitoring of the monitoring scene, and support the real-time viewing function of cloud data of the remote multi-mode client, effectively ensuring the real-time and continuity of the online monitoring data. It needs to be further explained that the monitoring system is a relatively mature existing technical means and will not be elaborated too much here.

[0049] Working principle: Automatic operation start: When a new energy vehicle suddenly catches fire, the smoke sensor 9 will first detect the abnormality and immediately issue an early warning. The monitoring device 10 will automatically divide the key areas for surveillance. The thermal infrared sensor 8 will detect abnormal high temperature and automatically review it through manual or video monitoring. If it is found that the vehicle produces smoke or even open fire, the fireproof cover 4 arranged on the roof of the garage 2 will be automatically triggered in an emergency. The fireproof cover 4 will be quickly released from the folded state by the lifting component 3, and the vehicle will be completely wrapped in the parking area. The inside of the fireproof cover 4 will be opened synchronously under the control of the monitoring system. The external high-pressure fire water and perfluoroacetone fire extinguishing agent are turned on. The fire water is sprayed through the nozzle 7 on the pipe body 1 5 to cool down. The perfluoroacetone fire extinguishing agent enters the flexible pipe 44 through the pipe body 2 6 and suppresses the fire in key areas such as the vehicle power battery through the nozzle 1 441. The fireproof cover 4 isolates the surrounding vehicles and prevents the fire from spreading rapidly. At the same time, it actively controls and blocks the continuous combustion conditions inside, delays the speed of vehicle spontaneous combustion, and minimizes the scale and intensity of vehicle combustion, so as to buy time for professional fire fighting agencies to come and deal with it, slow down the development and spread of the fire, and reduce the losses caused by the disaster.

[0050] On-site manual start-up: When the driver or passengers are in the vehicle, property patrol or passers-by discover that the vehicle is on fire, the fire cover 4 can be manually triggered to start emergency operation through an external switch. The same as the above automatic operation process, the fire cover 4 equipped with the spontaneous combustion vehicle parked in the parking area can be started with one button to immediately enter the standard disposal procedure, which is fast and efficient;

[0051] Manual mechanical operation in case of power failure. When the building suddenly loses power and an emergency occurs, the fire cover 4 can be manually retracted and extended through the set fall chain 34, and the external fire sprinkler and perfluoroacetone fire extinguishing agent switch can be manually turned on to perform full manual fire extinguishing. After everything is started, it is the same as the above automatic operation process;

[0052] Note: It needs to be further explained that the high impact resistance and isolation capacity of the present invention enable the fireproof cover 4 to play an important role in various fire scenarios including power battery fires, and the power battery of the new energy vehicle will produce violent combustion flames and toxic smoke when it is spontaneously combusted. The reason why the fireproof cover 4 is not provided with a smoke exhaust device is that according to the actual measured application scenario, if a dedicated long duct is equipped, not only the exhaust is not smooth and the cost is high, but also the actual smoke exhaust efficiency is not high, not only the toxic smoke cannot be quickly discharged, but the spontaneous combustion vehicle will also intensify the combustion due to the inhalation of fresh air;

[0053] Among them, the public space of the underground garage is originally huge, and is usually equipped with mechanical ventilation and smoke exhaust systems or smoke-proof partitions such as smoke barriers. Instead, it is better to shield the combustion smoke and fire-fighting water agent in the fireproof cover 4 to the maximum extent, which can both isolate the combustion-supporting air and reduce secondary disasters such as combustion and explosion.

[0054] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A garage platform for new energy vehicles based on fire extinguishing and prevention effects, comprising a garage floor plate (1) and a garage roof plate (2) for carrying the vehicle body, characterized in that: A lifting component (3) is installed in the middle of the garage roof slab (2). A fireproof cover (4) is installed at the bottom of the garage roof slab (2) and below the lifting component (3). A first pipe body (5) and a second pipe body (6) respectively penetrate through the top of the fireproof cover (4). Wherein, a plurality of support frames (41) are installed in the fireproof cover (4). Reinforcing ribs (42) are installed on one adjacent side of the plurality of support frames (41). A plurality of positioning rods (43) are installed below the interior of the fireproof cover (4). A plurality of flexible pipes (44) are installed around the plurality of support frames (41) in the fireproof cover (4). A skirt (45) is provided at the bottom of the fireproof cover (4). Wherein, a plurality of nozzles (7) are installed on the first pipe body (5). The second pipe body (6) is communicated with the plurality of flexible pipes (44).

2. The garage platform for a new energy vehicle based on the fire extinguishing and prevention effect according to claim 1, wherein: The support frame (41) is arranged in a "mouth" shape and is horizontally installed in the fireproof cover (4). The reinforcing rib (42) includes two support rods, and the two support rods are arranged in a staggered manner. Wherein, the middle parts of the two support rods are hinged by a pin shaft, and the two ends of the support rods are respectively hinged to the two support frames (41) by pin shafts.

3. A garage platform for new energy vehicles based on fire extinguishing and fire prevention effects according to claim 1, characterized in that: A first spray opening (441) is evenly arranged on the flexible pipe (44). A second spray opening (451) is evenly arranged on the skirt (45), and the number of the second spray openings (451) is greater than the number of the first spray openings (441).

4. A garage platform for new energy vehicles based on fire extinguishing and prevention effects according to claim 1, characterized in that: The inner lining of the fireproof cover (4) includes a first fireproof layer (46) and a second fireproof layer (47). The first fireproof layer (46) is located inside the second fireproof layer (47). The plurality of flexible pipes (44) are located on one adjacent side of the first fireproof layer (46) and the second fireproof layer (47).

5. A garage platform for new energy vehicles based on fire extinguishing and fire prevention effects according to claim 4, characterized in that: The first fireproof layer (46) is a high-strength flame-retardant quartz fabric layer, and the second fireproof layer (47) is made of alumina fiber blanket.

6. The garage platform for a new energy vehicle based on the fire extinguishing and prevention effect according to claim 1, characterized in that: The lifting component (3) includes a winch (31) and a plurality of guide wheels (33). The plurality of guide wheels (33) are symmetrically installed at the bottom of the garage roof slab (2) and on both sides of the fireproof cover (4). Wherein, a traction wire (32) is installed on the output shaft of the winch (31). The traction wire (32) is respectively wound in the plurality of guide wheels (33), and one end of the traction wire (32) far away from the winch (31) is connected to the skirt (45).

7. A garage platform for new energy vehicles based on fire extinguishing and fire prevention effects according to claim 6, characterized in that: The lifting component (3) further includes a chain hoist (34). A connecting rod is installed on the chain hoist (34), and the chain hoist (34) is connected to the plurality of guide wheels (33) through the connecting rod.

8. A garage platform for a new energy vehicle based on fire extinguishing and fire prevention effects according to claim 1, characterized in that: A plurality of thermal infrared sensors (8), a plurality of smoke sensors (9) and a plurality of monitoring devices (10) are respectively installed at the bottom of the garage roof slab (2).

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