Real-time intelligent indoor air quality monitoring and processing system

Abstract

The invention relates to the field of air quality monitoring, and discloses a real-time intelligent indoor air quality monitoring and processing system, which comprises a multi-module acquisition module, the multi-module acquisition module is responsible for comprehensively acquiring various key data of indoor air quality and transmitting the acquired data to a data processing and analyzing module; the multi-module acquisition module is connected with a data processing and analyzing module, and the data processing and analyzing module receives various parameters acquired by the multi-module acquisition module and performs deep analysis according to the parameters. According to the invention, the data processing and analysis module is utilized to carry out deep analysis according to the collected data, and the air comprehensive quality value is calculated through a specific formula, so that corresponding processing decisions are made intelligently, and the appropriate air purification control module is automatically started for different air quality problems; the indoor air pollution problem is solved according to noses, and the air purification effect and efficiency are improved.

Description

Technical Field

[0001] The invention relates to the technical field of air quality monitoring, and in particular to a real-time intelligent indoor air quality monitoring and processing system. Background Art

[0002] Air is one of the resources that people rely on for survival. With the development of science and technology and the rapid construction of chemical industry and manufacturing industry, people are increasingly concerned about the pollution of the environment and air. In order to ensure the quality of life, air monitoring devices are usually installed to ensure the health of people's living environment.

[0003] Common air monitoring devices usually extract and test the air to determine the air quality standard, and feed back the test results to the user, so that the user can understand the indoor air quality standard and perform ventilation and extraction processing to achieve the purpose of improving indoor air standards.

[0004] Considering the diversity of indoor air pollution, it is relatively simple to simply test the air quality standards and then ventilate the room. This is not only unable to quickly solve the problem of air pollution, but also easily leads to insignificant air purification effects, waste of resources and increased time costs. Moreover, some specific pollutants may not be treated in a timely and effective manner, affecting people's quality of life and health. Summary of the invention

[0005] In view of the deficiencies of the prior art, the present invention provides a real-time intelligent indoor air quality monitoring and processing system, which solves the problem in the prior art that it is impossible to provide targeted treatment for different indoor air pollution problems.

[0006] To achieve the above purpose, the present invention is implemented through the following technical solutions: a real-time intelligent indoor air quality monitoring and processing system, including a multi-module acquisition module, the multi-module acquisition module is responsible for all-round collection of various key data of indoor air quality, providing a basis for subsequent system analysis and intelligent adoption of solutions, and transmitting the collected data to the data processing and analysis module, the multi-module acquisition module is connected to the data processing and analysis module, the data processing and analysis module receives various parameters collected from the multi-module acquisition module, and performs in-depth analysis based on the parameters, intelligently selects corresponding processing methods based on the conclusions, and sends the conclusions to the air purification control module and the display and alarm module, the data processing and analysis module is connected to the air purification control module, the air purification control module is provided with multiple groups of different processing modules, receives the conclusions from the data processing and analysis module, and selects the appropriate processing module to start according to the conclusions, thereby ensuring the efficiency and effect of system processing, the data processing and analysis module is connected to the display and alarm module, the display and alarm module receives the data transmitted from the data processing and analysis module, and displays and issues an alarm according to the data content.

[0007] Preferably, the multi-module acquisition module includes a carbon dioxide detection module, which is equipped with a high-precision carbon dioxide sensor to accurately detect the concentration level of carbon dioxide in indoor air in real time; the carbon dioxide detection module is connected to an oxygen acquisition module, which uses a high-performance oxygen sensor to accurately measure the indoor oxygen content; the oxygen acquisition module is connected to a temperature acquisition module, which uses a high-precision temperature sensor to accurately measure the indoor temperature; the temperature acquisition module is connected to a humidity acquisition module, which uses a high-sensitivity humidity sensor to accurately measure the relative humidity of the indoor air; the humidity acquisition module is connected to a particle acquisition module, which uses a laser particle sensor to efficiently detect the concentration of PM2.5 and PM10 particles in the indoor air; the particle acquisition module is connected to a harmful gas detection module, which includes: a formaldehyde sensor and a benzene sensor to accurately detect the concentration of harmful gases in the indoor air; the harmful gas detection module is connected to a negative ion acquisition module, which uses a high-sensitivity negative ion detector to accurately detect the concentration of negative ions in the indoor air.

[0008] Preferably, the data processing and analysis module includes a data storage module, which receives various air quality data from the multi-module acquisition module, including carbon dioxide concentration, oxygen content, temperature, humidity, particulate matter concentration, harmful gas concentration and negative ion concentration. The data storage module is connected to a data judgment module, which compares and analyzes the received air quality data with preset standard values ​​in detail, and the data judgment module stores judgment criteria, and calculates the comprehensive air quality value based on multiple parameters.

[0009] Preferably, the comprehensive air quality value is calculated based on multiple parameters, wherein the specific calculation formula is:

[0010] X=w1×C_CO2+w2×O2%+w3×T+w4×H%+w5×P+w6×G+w7×N

[0011] Among them: w1, w2, w3, w4, w5, w6, w7 are the corresponding weight coefficients of each item; C_CO2 is the carbon dioxide concentration; O2% is the oxygen content; T is the temperature; H% is the humidity; P is the particulate matter concentration; G is the harmful gas concentration; N is the negative ion concentration.

[0012] Preferably, the data judgment module is connected to a processing decision-making module, and the processing decision-making module makes corresponding processing decisions according to the analysis results of the data judgment module, including deciding to start the ventilation module if the carbon dioxide concentration is too high; deciding to start the air purification and filtration module if the particulate matter concentration is too high; deciding to start the adsorption purification module if the concentration of harmful gases exceeds the standard; deciding to start the photocatalytic purification module if there are serious bacteria, viruses or odors in the room; and deciding to start the negative ion purification module if the negative ion concentration is too low.

[0013] Preferably, the air purification control module includes a ventilation module, which intelligently controls the opening and closing of windows and turns on the exhaust fan at the same time to achieve the purpose of ventilation. The ventilation module automatically starts when the data processing and analysis module determines that the indoor carbon dioxide concentration is too high, the oxygen content is insufficient, or the temperature or humidity exceeds a comfortable range. The ventilation module is connected to an air purification and filtration module, which accurately controls the operation of the air purifier. The air purifier can effectively remove suspended particles in the air, including dust, pollen, and smoke, through a filter filtering device. The air purification and filtration module automatically starts when the data processing and analysis module determines that the indoor particle concentration is too high.

[0014] Preferably, the air purification and filtration module is connected to an adsorption purification module, which controls the operation of the activated carbon exhaust fan and utilizes the adsorption effect of the activated carbon to remove harmful gas molecules in the air, reduce the concentration of harmful gases, improve indoor air quality, and protect the health of indoor personnel. The adsorption purification module automatically starts when the data processing and analysis module determines that the concentration of indoor harmful gases exceeds the standard.

[0015] Preferably, the adsorption purification module is connected to a photocatalytic purification module, which controls the operation of the photocatalytic purification equipment. The photocatalytic material can produce strong oxidizing substances under light of a specific wavelength, decompose organic matter in the air, kill bacteria and viruses, effectively remove odors, and improve indoor air quality. The photocatalytic purification module is individually controlled and started by the staff, because the start-up standard of the photocatalytic purification module is manually judged, based on the standard of whether the indoor personnel are sick or the odor is serious.

[0016] Preferably, the photocatalytic purification module is connected to a negative ion purification module, which controls the operation of a negative ion generator. The negative ion generator can generate a large amount of negative ions, which combine with particulate matter in the air to cause them to settle, and can also improve the physiological functions of the human body, enhance human immunity, and increase the freshness of the air. The negative ion purification module automatically starts when the data processing and analysis module determines that the indoor negative ion concentration is too low.

[0017] Preferably, the display and alarm module is connected to an information display module, the information display module receives information from the data processing and analysis module, and displays indoor air quality parameters in real time for users to view. The information display module is connected to an alarm module, and the alarm module is connected to the data judgment module. When the data judgment module judges that the indoor air is poor, an alarm is issued to remind indoor personnel to leave in time and take corresponding measures.

[0018] The present invention provides a real-time intelligent indoor air quality monitoring and processing system. It has the following beneficial effects:

[0019] 1. The present invention utilizes a data processing and analysis module to conduct in-depth analysis based on the collected data, and calculates the comprehensive air quality value through a specific formula, thereby intelligently formulating corresponding processing decisions, and automatically starting a suitable air purification control module for different air quality problems, achieving targeted treatment of indoor air pollution problems, improving air purification effects and efficiency, and avoiding waste of resources and increased time costs.

[0020] 2. The present invention sets up a multi-module collection module to comprehensively collect various key data of indoor air quality, including carbon dioxide concentration, oxygen content, temperature, humidity, particulate matter concentration, harmful gas concentration and negative ion concentration, etc., taking into account the diversity of indoor air pollution problems, which is conducive to targeted solutions to indoor air pollution problems.

[0021] 3. The present invention is equipped with a photocatalytic purification module, which can be started and controlled by the staff themselves. Taking the illness of indoor personnel or serious odor as the standard, it can effectively remove indoor bacteria or odor problems, further ensuring the hygiene of the indoor environment and the health of personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a flow chart of the present invention;

[0023] Figure 2 It is a flow chart of the data processing and analysis module of the present invention;

[0024] Figure 3 This is a flow chart of the air purification control module of the present invention;

[0025] Figure 4 It is a flow chart of the display and alarm module of the present invention. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the specification of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] Example:

[0028] Please see attached Figure 1 -Attached Figure 4The embodiment of the present invention provides a real-time intelligent indoor air quality monitoring and processing system, including a multi-module acquisition module, the multi-module acquisition module is responsible for collecting all kinds of key data of indoor air quality in an all-round way, providing a basis for subsequent system analysis and intelligent adoption of solutions, and transmitting the collected data to the data processing and analysis module, the multi-module acquisition module is connected to a data processing and analysis module, the data processing and analysis module receives various parameters collected from the multi-module acquisition module, and performs in-depth analysis according to the parameters, intelligently selects corresponding processing methods according to the conclusions, and sends the conclusions to the air purification control module and the display and alarm module, the data processing and analysis module is connected to the air purification control module, the air purification control module is provided with multiple groups of different processing modules, receives the conclusions from the data processing and analysis module, and selects the appropriate processing module to start according to the conclusions, thereby ensuring the efficiency and effect of system processing, the data processing and analysis module is connected to a display and alarm module, the display and alarm module receives the data transmitted from the data processing and analysis module, and displays and issues an alarm according to the data content.

[0029] The multi-module acquisition module includes a carbon dioxide detection module, which is equipped with a high-precision carbon dioxide sensor to accurately and real-time detect the concentration level of carbon dioxide in indoor air; the carbon dioxide detection module is connected to an oxygen acquisition module, which uses a high-performance oxygen sensor to accurately measure the indoor oxygen content; the oxygen acquisition module is connected to a temperature acquisition module, which uses a high-precision temperature sensor to accurately measure the indoor temperature; the temperature acquisition module is connected to a humidity acquisition module, which uses a high-sensitivity humidity sensor to accurately measure the relative humidity of the indoor air; the humidity acquisition module is connected to a particle acquisition module, which uses a laser particle sensor to efficiently detect the concentration of PM2.5, PM10 and other particles in the indoor air; the particle acquisition module is connected to a harmful gas detection module, which includes: a formaldehyde sensor and a benzene sensor to accurately detect the concentration of harmful gases in the indoor air; the harmful gas detection module is connected to a negative ion acquisition module, which uses a high-sensitivity negative ion detector to accurately detect the concentration of negative ions in the indoor air.

[0030] The data processing and analysis module includes a data storage module, which receives various air quality data from the multi-module acquisition module, including carbon dioxide concentration, oxygen content, temperature, humidity, particulate matter concentration, harmful gas concentration and negative ion concentration. The data storage module is connected to a data judgment module, which compares and analyzes the received air quality data with a preset standard value in detail, and the data judgment module stores the judgment criteria, and calculates the comprehensive quality value of the air according to multiple parameters;

[0031] The specific criteria are as follows:

[0032] Carbon dioxide concentration: 1000ppm;

[0033] Oxygen content: 19.5%;

[0034] Temperature: 18℃-26℃;

[0035] Humidity: 40%-60%;

[0036] Particle matter concentration: PM2.5 concentration exceeds 75 micrograms per cubic meter, PM10 concentration exceeds 150 micrograms per cubic meter;

[0037] Harmful gas concentration: formaldehyde concentration exceeds 0.08 mg / m3, benzene concentration exceeds 0.11 mg / m3;

[0038] Negative ion concentration: 500 / cubic centimeter.

[0039] The specific calculation formula is:

[0040] X=w1×C_CO2+w2×O2%+w3×T+w4×H%+w5×P+w6×G+w7×N

[0041] in:

[0042] X is the comprehensive quality value of the air. When X≥80, the air quality is excellent; when X<60, the air quality is low; when 60≤X<80, the air quality is medium;

[0043] w1, w2, w3, w4, w5, w6, w7 are the weight coefficients corresponding to each item;

[0044] C_CO2 is the carbon dioxide concentration;

[0045] O2% is the oxygen content;

[0046] T is temperature; H% is humidity;

[0047] P is the particle concentration;

[0048] G is the concentration of harmful gases;

[0049] N is the concentration of negative ions.

[0050] Virtual formula speculation:

[0051] 1. Determine the weight coefficient

[0052] First, conduct expert evaluation or data analysis to determine the relative importance of various parameters to air quality. For example, carbon dioxide concentration and harmful gas concentration may have a greater impact on air quality and be assigned a higher weight; while negative ion concentration has a relatively smaller impact and is assigned a lower weight. Assume that the weight coefficient is determined as:

[0053] w1 (weight of carbon dioxide concentration) = 0.2

[0054] w2 (oxygen content weight) = 0.15

[0055] w3 (temperature weight) = 0.1

[0056] w4 (humidity weight) = 0.1

[0057] w5 (particle concentration weight) = 0.2

[0058] w6 (harmful gas concentration weight) = 0.15

[0059] w7 (negative ion concentration weight) = 0.1

[0060] 2. Set the scoring criteria for each parameter

[0061] For carbon dioxide concentration C_CO2:

[0062] When C_CO2≤400ppm, the score for this item is 100 points.

[0063] As the carbon dioxide concentration increases, the score gradually decreases. When C_CO2 = 1000 ppm, the score is 60 points, and the score is lower when it is higher than 1000 ppm.

[0064] Oxygen content O2%:

[0065] The O2% scores 100 points when it is around 20.9%.

[0066] When O2% is close to 19.5%, the score is 60. Below 19.5%, the score is lower.

[0067] Temperature T:

[0068] The score is 100 at around 22℃.

[0069] When the temperature deviates from 22°C, the score gradually decreases. The score is even lower outside the range of 18°C-26°C. For example, when T=17°C or T=27°C, the score is 70 points.

[0070] Humidity H%:

[0071] A score of around 50% is 100 points.

[0072] When humidity is close to 40% or 60%, the score is 60. Outside the 40%-60% range, the score is lower.

[0073] Particle concentration P:

[0074] The score is 100 when both PM2.5 and PM10 concentrations are low.

[0075] When PM2.5 concentration exceeds 75 micrograms per cubic meter or PM10 concentration exceeds 150 micrograms per cubic meter, the score is 60. Higher concentrations result in lower scores.

[0076] Harmful gas concentration G:

[0077] When the concentration of harmful gases such as formaldehyde and benzene is very low, the score is 100 points.

[0078] When the formaldehyde concentration exceeds 0.08 mg / m3 or the benzene concentration exceeds 0.11 mg / m3, the score is 60. Higher concentrations result in lower scores.

[0079] Negative ion concentration N:

[0080] When N ≥ 1000 / cm3, the score is 100 points.

[0081] When N = 500 pieces / cm3, the score is 60. When it is less than 500 pieces / cm3, the score is even lower.

[0082] 3. Calculate the comprehensive quality value X

[0083] Assume that the values ​​of the parameters at a certain moment are:

[0084] C_CO2=800ppm, according to the scoring criteria, the score for this item is 70 points.

[0085] O2%=20%, the score is 80 points.

[0086] T=23℃, score is 85 points.

[0087] H%=55%, score is 80 points.

[0088] P (assuming PM2.5 concentration is 60 micrograms / cubic meter and PM10 concentration is 120 micrograms / cubic meter), the score is 80 points.

[0089] G (assuming the formaldehyde concentration is 0.06 mg / m3 and the benzene concentration is 0.08 mg / m3), the score is 85 points.

[0090] N = 600 / cubic centimeter, score is 70 points.

[0091] Then the comprehensive quality value X = w1×70+w2×80+w3×85+w4×80+w5×80+w6×85+w7×70.

[0092] X=0.2×70+0.15×80+0.1×85+0.1×80+0.2×80+0.15×85+0.1×70=78.

[0093] Through the calculation and analysis of a large number of different parameter combinations, it is possible to determine the judgment criteria that the air quality is excellent when X ≥ 80 and the air quality is poor when X < 60. At the same time, the weight coefficient and scoring criteria can be continuously adjusted according to the actual situation to improve the accuracy of the judgment.

[0094] The data judgment module is connected to a processing decision-making module, and the processing decision-making module makes corresponding processing decisions according to the analysis results of the data judgment module, including deciding to start the ventilation module if the carbon dioxide concentration is too high; deciding to start the air purification and filtration module if the particulate matter concentration is too high; deciding to start the adsorption purification module if the concentration of harmful gases exceeds the standard; deciding to start the photocatalytic purification module if there are serious bacteria, viruses or odors in the room; and deciding to start the negative ion purification module if the negative ion concentration is too low.

[0095] The air purification control module includes a ventilation module, which intelligently controls the opening and closing of windows and turns on the exhaust fan at the same time, so as to achieve the purpose of ventilation. The ventilation module automatically starts when the data processing and analysis module determines that the indoor carbon dioxide concentration is too high, the oxygen content is insufficient, and the temperature or humidity exceeds the comfortable range. The ventilation module is connected to an air purification filter module, which accurately controls the operation of the air purifier. The air purifier can effectively remove suspended particles in the air, such as dust, pollen, and smoke, through filtering devices such as high-efficiency filters. The air purification filter module automatically starts when the data processing and analysis module determines that the indoor particle concentration is too high. The air purification filter module is connected to an adsorption purification module, which controls the operation of the activated carbon exhaust fan, and uses the adsorption effect of the activated carbon to remove harmful gas molecules in the air, reduce the concentration of harmful gases, improve the indoor air quality, and protect the health of indoor personnel. The adsorption purification module automatically starts when the data processing and analysis module determines that the indoor harmful gas concentration exceeds the standard. The adsorption purification module is connected to a photocatalytic purification module, which controls the operation of the photocatalytic purification equipment. The photocatalytic material can produce strong oxidizing substances under light of a specific wavelength, decompose organic matter in the air, kill bacteria and viruses, effectively remove odors, and improve indoor air quality. The photocatalytic purification module is independently controlled and started by the staff. Because the starting standard of the photocatalytic purification module is artificially judged, the standard is whether the indoor personnel are sick or the odor is serious. The photocatalytic purification module is connected to a negative ion purification module, which controls the operation of the negative ion generator. The negative ion generator can generate a large amount of negative ions, combine with particulate matter in the air, and make it settle. At the same time, it can also improve the physiological functions of the human body, enhance human immunity, and increase the freshness of the air. The negative ion purification module automatically starts when the data processing and analysis module determines that the indoor negative ion concentration is too low.

[0096] The display and alarm module is connected to an information display module, which receives information from the data processing and analysis module and displays indoor air quality parameters in real time for users to view. The information display module is connected to an alarm module, which is connected to a data judgment module. When the data judgment module determines that the indoor air is poor, it issues an alarm to remind indoor personnel to leave in time and take corresponding measures.

[0097] 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 real-time intelligent indoor air quality monitoring and processing system, characterized in that: It includes a multi-module acquisition module, which is responsible for collecting various key data of indoor air quality in an all-round way and transmitting the collected data to the data processing and analysis module. The multi-module acquisition module is connected to a data processing and analysis module, which receives various parameters collected from the multi-module acquisition module and performs in-depth analysis based on the parameters. The data processing and analysis module is connected to an air purification control module, in which a plurality of different processing modules are arranged to receive conclusions from the data processing and analysis module. The data processing and analysis module is connected to a display and alarm module, which receives data transmitted from the data processing and analysis module and displays and issues an alarm based on the data content.

2. A real-time intelligent indoor air quality monitoring and processing system according to claim 1, characterized in that: The multi-module acquisition module includes a carbon dioxide detection module, which is equipped with a high-precision carbon dioxide sensor; the carbon dioxide detection module is connected to an oxygen acquisition module, which uses a high-performance oxygen sensor to accurately measure the indoor oxygen content; the oxygen acquisition module is connected to a temperature acquisition module, which uses a high-precision temperature sensor; the temperature acquisition module is connected to a humidity acquisition module, which uses a high-sensitivity humidity sensor; the humidity acquisition module is connected to a particle acquisition module, which uses a laser particle sensor; the particle acquisition module is connected to a harmful gas detection module, which includes a formaldehyde sensor and a benzene sensor; the harmful gas detection module is connected to a negative ion acquisition module, which uses a high-sensitivity negative ion detector.

3. A real-time intelligent indoor air quality monitoring and processing system according to claim 1, characterized in that: The data processing and analysis module includes a data storage module, which receives various air quality data from the multi-module acquisition module, including carbon dioxide concentration, oxygen content, temperature, humidity, particulate matter concentration, harmful gas concentration and negative ion concentration. The data storage module is connected to a data judgment module, which compares and analyzes the received air quality data with preset standard values ​​in detail, and the data judgment module stores judgment criteria, and calculates the comprehensive air quality value based on multiple parameters.

4. A real-time intelligent indoor air quality monitoring and processing system according to claim 1, characterized in that: The comprehensive air quality value is calculated based on multiple parameters, wherein the specific calculation formula is: X=w1×C_CO2+w2×O2%+w3×T+w4×H%+w5×P+w6×G+w7×N Among them: w1, w2, w3, w4, w5, w6, w7 are the corresponding weight coefficients of each item; C_CO2 is the carbon dioxide concentration; O2% is the oxygen content; T is the temperature; H% is the humidity; P is the particulate matter concentration; G is the harmful gas concentration; N is the negative ion concentration.

5. A real-time intelligent indoor air quality monitoring and processing system according to claim 1, characterized in that: The data judgment module is connected to a processing decision-making module, and the processing decision-making module makes corresponding processing decisions according to the analysis results of the data judgment module.

6. A real-time intelligent indoor air quality monitoring and processing system according to claim 1, characterized in that: The air purification control module includes a ventilation module, which intelligently controls the opening and closing of windows and turns on the exhaust fan at the same time to achieve the purpose of ventilation. The ventilation module is connected to an air purification filter module, which accurately controls the operation of the air purifier. The air purifier effectively removes suspended particles in the air, including dust, pollen, and smoke, through a filter filter device.

7. A real-time intelligent indoor air quality monitoring and processing system according to claim 1, characterized in that: The air purification and filtration module is connected to an adsorption purification module, and the adsorption purification module controls the activated carbon exhaust fan to operate, and utilizes the adsorption effect of the activated carbon to remove harmful gas molecules in the air.

8. A real-time intelligent indoor air quality monitoring and processing system according to claim 7, characterized in that: The adsorption purification module is connected to a photocatalytic purification module, which controls the operation of the photocatalytic purification device. The photocatalytic material can produce strong oxidizing substances under light of a specific wavelength, decompose organic matter in the air, kill bacteria and viruses, and effectively remove odors.

9. A real-time intelligent indoor air quality monitoring and processing system according to claim 8, characterized in that: The photocatalytic purification module is connected to a negative ion purification module, and the negative ion purification module controls the operation of a negative ion generator. The negative ion generator generates a large amount of negative ions, which combine with particulate matter in the air to cause them to settle.

10. A real-time intelligent indoor air quality monitoring and processing system according to claim 1, characterized in that: The display and alarm module is connected to an information display module, which receives information from the data processing and analysis module and displays indoor air quality parameters in real time for users to view. The information display module is connected to an alarm module, which is connected to a data judgment module. When the data judgment module determines that the indoor air is poor, it issues an alarm to remind indoor personnel to leave in time and take corresponding measures.

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