CN117491573A - Laboratory harmful gas detection early warning method and system based on multi-point-position monitoring - Google Patents
Laboratory harmful gas detection early warning method and system based on multi-point-position monitoring Download PDFInfo
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- 238000012216 screening Methods 0.000 claims description 10
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- 238000004590 computer program Methods 0.000 claims description 7
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- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 6
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0062—General constructional details of gas analysers, e.g. portable test equipment concerning the measuring method or the display, e.g. intermittent measurement or digital display
- G01N33/0063—General constructional details of gas analysers, e.g. portable test equipment concerning the measuring method or the display, e.g. intermittent measurement or digital display using a threshold to release an alarm or displaying means
- G01N33/0065—General constructional details of gas analysers, e.g. portable test equipment concerning the measuring method or the display, e.g. intermittent measurement or digital display using a threshold to release an alarm or displaying means using more than one threshold
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N13/00—Investigating surface or boundary effects, e.g. wetting power; Investigating diffusion effects; Analysing materials by determining surface, boundary, or diffusion effects
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0027—General constructional details of gas analysers, e.g. portable test equipment concerning the detector
- G01N33/0031—General constructional details of gas analysers, e.g. portable test equipment concerning the detector comprising two or more sensors, e.g. a sensor array
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N13/00—Investigating surface or boundary effects, e.g. wetting power; Investigating diffusion effects; Analysing materials by determining surface, boundary, or diffusion effects
- G01N2013/003—Diffusion; diffusivity between liquids
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
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Abstract
The invention discloses a laboratory harmful gas detection early warning method and system based on multi-point location monitoring, which relate to the technical field of laboratory gas detection and comprise the following steps: setting a plurality of harmful gas monitoring points based on a spatial structure of a laboratory, and setting a gas detector on the harmful gas monitoring points; acquiring the concentration of harmful gas by a gas detector based on the monitoring period; monitoring point position analysis is carried out on the harmful gas concentration exceeding the standard obtained by the harmful gas monitoring point position, a diffusion range is obtained, and the simulated diffusion quantity of the harmful gas is calculated based on the diffusion range and the harmful gas concentration; and outputting a basic early warning signal when the concentration of the harmful gas exceeding the standard is obtained. The method is used for solving the problems that the prior art lacks a rapid and effective diffusion analysis method for harmful gas, does not carry out comprehensive analysis based on spatial distribution and ventilation of the whole laboratory, has insufficient pertinence and fineness of detection and early warning of the harmful gas, and is inaccurate in early warning.
Description
Technical Field
The invention relates to the technical field of laboratory gas detection, in particular to a laboratory harmful gas detection early warning method and system based on multi-point monitoring.
Background
Most of the chemical medicines in the laboratory are toxic substances, and in general, because the dosage is small, poisoning accidents caused by medicines are not generally caused, wherein toxic gases in the toxic substances are emitted into the air of the laboratory and can be inhaled by human bodies to cause injury, and therefore, compared with toxic liquids or solids, the detection of the toxic gases in the air in the laboratory space is particularly important.
The existing laboratory gas acquisition technology lacks the detection method of the harmful gas emission amount, usually, whether the harmful gas concentration on the point location exceeds the standard or not is warned, for example, in China patent with the application publication number of CN110487963A, a laboratory hazardous gas detection method and device based on the Internet of things are disclosed, when the method is used for warning, the detected gas concentration is compared with a safety threshold value, the diffusion monitoring of an image and the warning are carried out on the area exceeding the safety threshold value, the detection warning method has a plurality of defects, the harmful gas emission of the laboratory is usually generated by a certain experimental product, namely, most of the harmful gas emission of the laboratory is intensively emitted from one point location, the experimental product is only one emission point location in the whole laboratory throughout the whole laboratory, if the emission point location is very small in emission amount, the detected concentration value is very high when the emission point location is very close to the detection point location, and the warning is carried out as long as the detected concentration value exceeds the standard by adopting the existing detection warning method; however, because the laboratory keeps a ventilation state for a long time, the design space of the existing laboratory also has a certain volume, a small amount of concentrated concentration emission is quickly ventilated for dilution or elimination, the long-term influence on the whole laboratory is not great, the laboratory can completely and automatically solve the problem of periodic ventilation, so that the emission and diffusion analysis of harmful gas in the prior art is not accurate and comprehensive enough, a rapid and effective diffusion analysis method for the harmful gas is not available, comprehensive analysis is not carried out based on the spatial distribution and ventilation of the whole laboratory, the pertinence and the delicacy of detection and early warning of the harmful gas are insufficient, and the early warning is inaccurate.
Disclosure of Invention
The invention aims to solve at least one of the technical problems in the prior art to a certain extent, by carrying out space division setting on monitoring points in a laboratory, the diffusion amount and the diffusion range of harmful gases in the laboratory can be evaluated in time, and then comprehensive calculation is carried out on the monitoring points and the diffusion range and the periodic ventilation amount of the laboratory, so that the harmful gas emission in the laboratory can be further accurately detected and early-warned, the early-warning result can be more attached to the actual situation of the harmful gas emission in the laboratory, the problem that the prior art lacks a rapid and effective diffusion analysis method for the harmful gases, the comprehensive analysis is not carried out based on the space distribution and the ventilation of the whole laboratory, the pertinence and the delicacy of the detection and the early warning of the harmful gases are insufficient, and the early warning is inaccurate is solved.
In order to achieve the above object, in a first aspect, a laboratory harmful gas detection and early warning method based on multi-point location monitoring includes the following steps: setting a plurality of harmful gas monitoring points based on a spatial structure of a laboratory, and setting a gas detector on the harmful gas monitoring points;
acquiring the concentration of harmful gas by a gas detector based on the monitoring period;
Monitoring point position analysis is carried out on the harmful gas concentration exceeding the standard obtained by the harmful gas monitoring point position, a diffusion range is obtained, and the simulated diffusion quantity of the harmful gas is calculated based on the diffusion range and the harmful gas concentration;
and outputting a basic early warning signal when the concentration of the harmful gas exceeding the standard is obtained, obtaining the total ventilation quantity in a single ventilation period, calculating with the simulated diffusion quantity of the harmful gas to obtain the simulated residual concentration of the harmful gas, and carrying out ventilation early warning based on the simulated residual concentration of the harmful gas.
Further, the setting of the plurality of harmful gas monitoring points based on the spatial structure of the laboratory comprises the following sub-steps: acquiring a top view of a spatial structure of a laboratory, and setting the top view as the top view of the laboratory;
acquiring the outline of a top view of a laboratory, setting the outline as a basic laboratory outline, reducing the basic laboratory outline according to a first proportion, and setting the reduced basic laboratory outline as a drawing laboratory outline;
performing frame selection on the laboratory drawing outline by using a rectangle, setting a minimum rectangle capable of performing complete frame selection on the laboratory drawing outline as a basic frame selection rectangle, and setting a diagram formed by the basic frame selection rectangle and the laboratory drawing outline as a laboratory frame selection diagram;
Establishing a plane rectangular coordinate system, wherein the plane rectangular coordinate system comprises an X axis and a Y axis, and dividing the plane rectangular coordinate system into grids which are square, and the side length of each grid is a first side length;
placing the laboratory frame selection diagram into a plane rectangular coordinate system, enabling one vertex of a basic frame selection rectangle of the laboratory frame selection diagram to coincide with one vertex of any grid in the plane rectangular coordinate system, and enabling the length and the width of the basic frame selection rectangle to be parallel to an X axis and a Y axis of the plane rectangular coordinate system respectively;
setting a region which can be divided into a complete grid by the outline of the laboratory drawing as a standard dividing grid, and setting a harmful gas monitoring point position in the standard dividing grid;
setting an area which cannot be divided into a complete grid by the outline of the laboratory drawing as a to-be-divided grid, analyzing the to-be-divided grid, setting the to-be-divided grid as an edge dividing grid when the area of the to-be-divided grid is larger than that of 1/2 grid, and setting a harmful gas monitoring point in the edge dividing grid; when the area of the to-be-divided grid is smaller than or equal to the area of the 1/2 grid, the to-be-divided grid is set as a supplementary grid, and the supplementary grid is supplemented into any one adjacent standard dividing grid.
Further, the setting of the plurality of harmful gas monitoring points based on the spatial structure of the laboratory further includes the substeps of: acquiring the height of a space structure of a laboratory, and setting the height as the laboratory height;
establishing a three-dimensional coordinate system, wherein the three-dimensional coordinate system comprises an X axis, a Y axis and a Z axis, and the X axis and the Y axis of the three-dimensional coordinate system are respectively identical to the X axis and the Y axis of the plane rectangular coordinate system;
translating the laboratory drawing outline by one laboratory height in the Z-axis extending direction, and setting the space between the translated laboratory drawing outline and the laboratory drawing outline before translation to obtain a laboratory three-dimensional structure;
setting a cuboid divided along the Z-axis direction by taking a standard dividing grid as a bottom surface in a three-dimensional structure of a laboratory as a standard acquisition body, and setting a harmful gas monitoring point position in the center of the standard acquisition body; setting a column body divided along the Z-axis direction by taking an edge dividing grid as a bottom surface in a three-dimensional structure of a laboratory as an edge collecting body, and setting a harmful gas monitoring point position at any position with the height of the edge collecting body being 1/2 of the height of the laboratory; the column body divided along the Z-axis direction by taking the supplement grid as the bottom surface in the three-dimensional structure of the laboratory is set as a supplement body, and the supplement body is supplemented into any adjacent standard collection body to form a new standard collection body.
Further, the acquisition of the harmful gas concentration by the gas detector based on the monitoring period includes the following sub-steps: and acquiring the concentration of harmful gas through a gas detector according to a preset monitoring period, acquiring a concentration threshold of a laboratory, outputting the harmful gas concentration which exceeds the standard when the concentration of the harmful gas acquired in real time is larger than the concentration threshold, and adjusting the monitoring period into a screening period, wherein the monitoring frequency of the screening period is larger than that of the monitoring period.
Further, monitoring point position analysis is carried out on the out-of-standard harmful gas concentration obtained by the harmful gas monitoring point position to obtain a diffusion range, and the harmful gas simulated diffusion quantity obtained by calculation based on the diffusion range and the harmful gas concentration comprises the following sub-steps: marking the monitoring point positions of the concentration of the harmful gas exceeding the standard as exceeding the standard diffusion point positions; acquiring a standard acquisition body or an edge acquisition body where an out-of-standard diffusion point is located, and marking the standard acquisition body or the edge acquisition body as the out-of-standard acquisition body;
setting the space region where all the exceeding collecting bodies are located as a diffusion range, and multiplying the volume of each exceeding collecting body by the corresponding harmful gas concentration to obtain exceeding diffusion quantity; and adding all the out-of-standard diffusion amounts in the diffusion range to obtain the simulated diffusion amount of the harmful gas.
Further, outputting the basic early warning signal when the concentration of the harmful gas exceeding the standard is obtained comprises the following sub-steps: marking the monitoring points of harmful gases, and marking the monitoring points of the harmful gases as JD in sequence 1 To JD n N is equal to the number of harmful gas monitoring points, coordinates of each harmful gas monitoring point in a three-dimensional coordinate system are obtained, and the coordinates are respectively marked as (X1, Y1, Z1) to (Xn, yn, zn), and the harmful gas monitoring is carried outPoint location reference JD 1 To JD n Corresponding to the coordinate marks (X1, Y1, Z1) to (Xn, yn, zn), respectively; when the concentration of the harmful gas exceeding the standard is obtained, a basic early warning signal is output, wherein the basic early warning signal comprises the marks and the coordinate marks of the harmful gas monitoring points.
Further, the step of obtaining the total ventilation in a single ventilation cycle includes the following sub-steps: acquiring the duration of a primary ventilation period of a laboratory ventilation system, and marking the duration as the duration of the primary ventilation period;
acquiring real-time ventilation of a laboratory ventilation system; multiplying the single ventilation time length by the real-time ventilation amount to obtain the total ventilation amount of the laboratory in one ventilation period.
Further, the total ventilation quantity in a single ventilation period is obtained, and the total ventilation quantity and the harmful gas simulated diffusion quantity are calculated to obtain the harmful gas simulated residual concentration, and the ventilation early warning based on the harmful gas simulated residual concentration comprises the following substeps: the method comprises the steps of obtaining the number n of harmful gas monitoring points, and dividing the total ventilation quantity by n to obtain unit ventilation quantity;
Adding the volume of each exceeding standard collector in the diffusion range to unit ventilation to obtain unit dilution volume, adding all unit dilution volumes to obtain total dilution volume, and dividing the simulated diffusion volume of the harmful gas by the total dilution volume to obtain simulated residual concentration of the harmful gas; and outputting a ventilation early warning signal when the simulated residual concentration of the harmful gas is greater than a concentration threshold value.
In a second aspect, the invention provides a laboratory harmful gas detection early warning system based on multi-point location monitoring, which comprises a monitoring point location setting module, a real-time monitoring acquisition module, a monitoring diffusion analysis module and an early warning module;
the monitoring point position setting module is used for setting a plurality of harmful gas monitoring points based on a spatial structure of a laboratory, and setting a gas detector on the harmful gas monitoring points;
the real-time monitoring acquisition module is used for acquiring the concentration of harmful gas through the gas detector based on a monitoring period;
the monitoring diffusion analysis module is used for carrying out monitoring point position analysis on the over-standard harmful gas concentration obtained by the harmful gas monitoring point position to obtain a diffusion range, and calculating the simulated diffusion quantity of the harmful gas based on the diffusion range and the harmful gas concentration;
The early warning module comprises a basic early warning unit and a ventilation early warning unit, wherein the basic early warning unit is used for outputting a basic early warning signal when the concentration of the harmful gas exceeding the standard is acquired; the ventilation early warning unit is used for obtaining the total ventilation quantity in a single ventilation period, calculating the total ventilation quantity and the harmful gas simulated diffusion quantity to obtain the harmful gas simulated residual concentration, and carrying out ventilation early warning based on the harmful gas simulated residual concentration.
In a third aspect, the present application provides a storage medium having stored thereon a computer program which, when executed by a processor, performs the steps of the method as described above.
The invention has the beneficial effects that: according to the invention, the plurality of harmful gas monitoring points are arranged according to the spatial structure of the laboratory, the gas detector is arranged on the harmful gas monitoring points, and the monitoring range is defined for different harmful gas monitoring points, so that the rapid analysis of harmful gas diffusion in the laboratory can be realized, and the efficiency and accuracy of harmful gas detection and analysis in the laboratory are improved;
according to the invention, the monitoring point position analysis is carried out on the over-standard harmful gas concentration obtained by the harmful gas monitoring point position to obtain the diffusion range, the harmful gas simulated diffusion quantity is obtained by calculating based on the diffusion range and the harmful gas concentration, and the diffusion range and the generation quantity of the harmful gas can be rapidly calculated when the harmful gas is generated by rapidly calculating based on the radiation range of the harmful gas monitoring point position and the monitored concentration, so that the quantitative analysis on the harmful gas generation and diffusion in a laboratory is realized, and the reliability of early warning analysis is improved;
The method comprises the steps of outputting a basic early warning signal when the concentration of the harmful gas exceeding the standard is obtained, obtaining the total ventilation quantity in a single ventilation period, calculating with the simulated diffusion quantity of the harmful gas to obtain the simulated residual concentration of the harmful gas, and carrying out ventilation early warning based on the simulated residual concentration of the harmful gas; the basis early warning can realize basic early warning function when producing harmful gas in the laboratory, can combine laboratory periodic ventilation result to realize further accurate early warning simultaneously to the auxiliary laboratory staff of being convenient for carries out further accurate judgement to the production and the diffusion of harmful gas in the laboratory, improves the harmful gas in laboratory and detects early warning judgement's accuracy and comprehensiveness.
Additional features and advantages of the application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application. The objectives and other advantages of the application will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
FIG. 1 is a schematic block diagram of a system of the present invention;
FIG. 2 is a flow chart of the steps of the method of the present invention;
Fig. 3 is a schematic diagram of a laboratory frame selection grid division in a planar rectangular coordinate system according to the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
Referring to fig. 1, the laboratory harmful gas detection early warning system based on multi-point location monitoring provided by the invention can evaluate the diffusion amount and the diffusion range of harmful gas in a laboratory in time by carrying out space division setting on monitoring points in the laboratory, and then carries out comprehensive calculation with the ventilation amount of a foundation of the laboratory, and can further carry out accurate detection and early warning on the harmful gas emission of the laboratory, so that the early warning result can be more attached to the actual situation of the harmful gas emission in the laboratory.
Specifically, the monitoring point position setting module is used for setting a plurality of harmful gas monitoring points based on a spatial structure of a laboratory, and setting a gas detector on the harmful gas monitoring points; the toxic gases used for detection by the gas detector comprise one or more of ozone, nitrogen dioxide, sulfur dioxide, carbon monoxide, ammonia, formaldehyde, benzene, toluene, xylene, total volatile organic compounds, trichloroethylene, tetrachloroethylene, benzopyrene, inhalable particles and fine particles according to the specification of the existing indoor air quality standard; the detection function is set according to the experimental functions of the laboratories, and different laboratories can generate specific harmful gases due to different experiments, so that the harmful gases can be set pertinently according to the types of the harmful gases which can be generated by each laboratory when the gas sensor in the gas detector is arranged;
the monitoring point position setting module is configured with a plane monitoring point position setting strategy, and the plane monitoring point position setting strategy comprises: acquiring a top view of a spatial structure of a laboratory, and setting the top view as the top view of the laboratory;
acquiring the outline of a top view of a laboratory, setting the outline as a basic laboratory outline, reducing the basic laboratory outline according to a first proportion, and setting the reduced basic laboratory outline as a drawing laboratory outline; the existing laboratory is usually not lower than 100 square meters in design, when the top view of the laboratory is subjected to digital processing, the first proportion is set to be 1/100, and 1 cm in the reduced laboratory drawing outline is equal to 1 meter in the actual laboratory basic outline;
The method comprises the steps that a laboratory drawing outline is subjected to frame selection by using a rectangle, the smallest rectangle capable of completely frame selecting the laboratory drawing outline is set as a basic frame selection rectangle, a diagram formed by the basic frame selection rectangle and the laboratory drawing outline is set as a laboratory frame selection diagram, the top view of the existing laboratory design is rectangular in general, when the top view of the laboratory is rectangular, the laboratory frame selection diagram is the laboratory drawing outline, the laboratory drawing outline is subjected to rectangular frame selection, the laboratory drawing outline can be conveniently subjected to unit division, the laboratory can be more evenly distributed when monitoring points are arranged, and the average coverage of the monitoring points of harmful gases in the laboratory can be realized as far as possible;
referring to fig. 3, a plane rectangular coordinate system is established, wherein the plane rectangular coordinate system comprises an X axis and a Y axis, the plane rectangular coordinate system is divided into grids, the grids are square, and the side length of each grid is a first side length; the first side length is 3cm, a monitoring area is 9 square meters in a laboratory, a harmful gas monitoring point position is set, and the area which is not completely divided by a grid is divided according to the following dividing method;
placing the laboratory frame selection diagram into a plane rectangular coordinate system, enabling one vertex of a basic frame selection rectangle of the laboratory frame selection diagram to coincide with one vertex of any grid in the plane rectangular coordinate system, and enabling the length and the width of the basic frame selection rectangle to be parallel to an X axis and a Y axis of the plane rectangular coordinate system respectively;
Setting a region which can be divided into a complete grid by the laboratory drawing outline as a standard dividing grid, setting a harmful gas monitoring point position in the standard dividing grid, and dividing the laboratory drawing outline into a plurality of grids in an ideal state;
setting an area which cannot be divided into a complete grid by the outline of the laboratory drawing as a to-be-divided grid, analyzing the to-be-divided grid, setting the to-be-divided grid as an edge dividing grid when the area of the to-be-divided grid is larger than that of 1/2 grid, and setting a harmful gas monitoring point in the edge dividing grid; when the area of the grids to be divided is smaller than or equal to the area of 1/2 grid, the grids to be divided are set as supplementary grids, the supplementary grids are supplemented into any adjacent standard dividing grids, and as the building design of the laboratory cannot be a structure which is completely divided by a plurality of grids, the structure can be divided by the dividing method in the edge area of the laboratory, in the structure with the excessive edges, if the area divided by the grids is larger than 1/2, that is, the actual area is larger than 4.5 square meters, one harmful gas monitoring point can be independently added, and if the actual area is smaller than 4.5 square meters, the excessive areas can be divided into the adjacent grids, and the problem that the arrangement of the harmful gas monitoring point in the adjacent grids is not uniform and reasonable can be well solved.
After plane division is carried out, harmful gas monitoring points are required to be arranged in a three-dimensional space of a laboratory, a specific setting process is realized through a monitoring point setting module, the monitoring point setting module is further configured with a three-dimensional monitoring point setting strategy, and the three-dimensional monitoring point setting strategy comprises: acquiring the height of a space structure of a laboratory, and setting the height as the laboratory height;
establishing a three-dimensional coordinate system, wherein the three-dimensional coordinate system comprises an X axis, a Y axis and a Z axis, and the X axis and the Y axis of the three-dimensional coordinate system are respectively identical to the X axis and the Y axis of the plane rectangular coordinate system; translating the laboratory drawing outline by one laboratory height in the Z-axis extending direction, and setting the space between the translated laboratory drawing outline and the laboratory drawing outline before translation to obtain a laboratory three-dimensional structure;
setting a cuboid divided along the Z-axis direction by taking a standard dividing grid as a bottom surface in a three-dimensional structure of a laboratory as a standard acquisition body, and setting a harmful gas monitoring point position in the center of the standard acquisition body; setting a column body divided along the Z-axis direction by taking an edge dividing grid as a bottom surface in a three-dimensional structure of a laboratory as an edge collecting body, and setting a harmful gas monitoring point position at any position with the height of the edge collecting body being 1/2 of the height of the laboratory; the column body divided along the Z-axis direction by taking the supplement grid as the bottom surface in the three-dimensional structure of the laboratory is set as the supplement body, the supplement body is supplemented to any one adjacent standard collection body to form a new standard collection body, and when the harmful gas monitoring point positions are arranged in the three-dimensional space of the laboratory, the height of the harmful gas monitoring point positions can be adjusted according to the structure of the test bed of the laboratory, the preferred height of the embodiment is half of the height of the laboratory, and the whole area of the laboratory can be better monitored and radiated.
The real-time monitoring acquisition module is used for acquiring the concentration of harmful gas through the gas detector based on the monitoring period; the real-time monitoring and collecting module is configured with a real-time monitoring and collecting strategy, and the real-time monitoring and collecting strategy comprises: acquiring harmful gas concentration through a gas detector according to a preset monitoring period, acquiring a concentration threshold of a laboratory, outputting harmful gas concentration which exceeds a standard when the harmful gas concentration acquired in real time is larger than the concentration threshold, adjusting the monitoring period to be a screening period, wherein the monitoring frequency of the screening period is larger than that of the monitoring period, the monitoring period is monitored once in 30 minutes to 60 minutes according to the existing laboratory monitoring standard when the monitoring period is preset, the screening period is once in 2 minutes, because the screening period is set when the exceeding standard harmful gas concentration occurs in the laboratory, the monitoring frequency needs to be increased to enhance the monitoring of the generation and diffusion of the harmful gas, the concentration threshold of the laboratory is set according to the existing indoor air quality standard, for example, the concentration of ozone is smaller than or equal to 0.16 milligram per cubic meter, and the concentration threshold of ozone is set to be 0.16 milligram per cubic meter when the detection is carried out on ozone; the concentration threshold values of ozone, nitrogen dioxide, sulfur dioxide, carbon monoxide, ammonia, formaldehyde, benzene, toluene, xylene, total volatile organic compounds, trichloroethylene, tetrachloroethylene, benzopyrene, inhalable particulate matters and fine particulate matters can be referred to in table 1 below.
The monitoring diffusion analysis module is used for carrying out monitoring point position analysis on the over-standard harmful gas concentration obtained by the harmful gas monitoring point position to obtain a diffusion range, and calculating the simulated diffusion quantity of the harmful gas based on the diffusion range and the harmful gas concentration; the monitoring diffusion analysis module is configured with a monitoring diffusion analysis strategy comprising: marking the monitoring point positions of the concentration of the harmful gas exceeding the standard as exceeding the standard diffusion point positions; acquiring a standard acquisition body or an edge acquisition body where an out-of-standard diffusion point is located, and marking the standard acquisition body or the edge acquisition body as the out-of-standard acquisition body;
setting the space region where all the exceeding collecting bodies are located as a diffusion range, and multiplying the volume of each exceeding collecting body by the corresponding harmful gas concentration to obtain exceeding diffusion quantity; the method comprises the steps of adding all the exceeding diffusion amounts in a diffusion range to obtain the simulated diffusion amount of the harmful gas, wherein the volume of the exceeding collection body can be obtained by multiplying the bottom area by the height, the bottom area can be obtained by dividing grids, the exceeding collection body is taken as a standard collection body, the laboratory height is 2.5 meters, the actual bottom area of a laboratory corresponding to the standard collection body is 9 square meters, the volume of the standard collection body is 22.5 cubic meters, the detected ozone content is 0.2 milligram per cubic meter by taking the exceeding ozone as an example, the exceeding diffusion amount of one exceeding collection body is calculated to be 4.5 milligram, and then the simulated diffusion amount of the harmful gas in the diffusion range is obtained by accumulation.
The early warning module comprises a basic early warning unit and a ventilation early warning unit, wherein the basic early warning unit is used for outputting a basic early warning signal when the concentration of the harmful gas exceeding the standard is acquired; the basic early warning unit is configured with a basic early warning strategy, and the basic early warning strategy comprises: marking the monitoring points of harmful gases, and marking the monitoring points of the harmful gases as JD in sequence 1 To JD n N is equal to the number of the harmful gas monitoring points, coordinates of each harmful gas monitoring point in a three-dimensional coordinate system are obtained, and the coordinates are respectively marked as (X1, Y1, Z1) to (Xn, yn, zn), and the marks JD of the harmful gas monitoring points 1 To JD n Corresponding to the coordinate marks (X1, Y1, Z1) to (Xn, yn, zn), respectively; when the concentration of the harmful gas exceeding the standard is obtained, outputting a basic early warning signal, wherein the basic early warning signal comprises the marks and the coordinate marks of harmful gas monitoring points; when basic early warning is carried out, the actual positions in the laboratory can be timely corresponding to the positions of the harmful gas monitoring points in the system by outputting the marks and the coordinate marks of the harmful gas monitoring points, so that the positions of harmful gas generation can be conveniently and rapidly found by workers in the laboratory, and the efficiency of harmful gas accident treatment is improved.
The ventilation early warning unit is used for acquiring the total ventilation quantity in a single ventilation period, calculating the total ventilation quantity and the simulated diffusion quantity of the harmful gas to obtain simulated residual concentration of the harmful gas, and carrying out ventilation early warning based on the simulated residual concentration of the harmful gas; the ventilation early-warning unit is configured with a ventilation amount calculation strategy including: acquiring the duration of a primary ventilation period of a laboratory ventilation system, and marking the duration as the duration of the primary ventilation period; the single ventilation duration of a typical laboratory can be set to 3 minutes in general.
Acquiring real-time ventilation of a laboratory ventilation system; the real-time ventilation volume that obtains is 30 cubic meters per minute, multiplies the duration of single ventilation and real-time ventilation volume and obtains the total ventilation volume of laboratory in a ventilation cycle, calculates the total ventilation volume in obtaining a ventilation cycle and is 90 cubic meters, and ventilation early warning unit still disposes surplus calculation strategy, and surplus calculation strategy includes: the method comprises the steps of obtaining the number n of harmful gas monitoring points, and dividing the total ventilation quantity by n to obtain unit ventilation quantity; when 10 harmful gas monitoring points exist in a laboratory, the unit ventilation quantity is equal to 9 cubic meters;
adding the volume of each exceeding standard collector in the diffusion range to unit ventilation to obtain unit dilution volume, adding all unit dilution volumes to obtain total dilution volume, and dividing the simulated diffusion volume of the harmful gas by the total dilution volume to obtain simulated residual concentration of the harmful gas; when the residual concentration of the harmful gas simulation is greater than the concentration threshold, a ventilation early warning signal is output, taking the example that only one exceeding standard collector exists in the diffusion range and the exceeding standard collector is a standard collector, the volume of the standard collector is 22.5 cubic meters, the unit dilution volume is 31.5 cubic meters, the total dilution volume is also 31.5 cubic meters, the detected ozone content is 0.2 milligram per cubic meter, the exceeding standard diffusion amount of the exceeding standard collector is calculated to be 4.5 milligram, the simulated diffusion amount of the harmful gas is also 4.5 milligram, the simulated diffusion amount of the harmful gas is divided by the total dilution volume to obtain the residual concentration of the harmful gas simulation to be 0.14 milligram per cubic meter, two decimal places are reserved as a result, and at the moment, the concentration threshold of the 0.14 is smaller than the ozone is 0.16, and the ventilation early warning signal is not output.
Example 2
Referring to fig. 2, the method for detecting and early warning the harmful gas in the laboratory based on multi-point location monitoring comprises the following steps: step S10, setting a plurality of harmful gas monitoring points based on a spatial structure of a laboratory, and setting a gas detector on the harmful gas monitoring points; step S10 comprises the following sub-steps: step S1011, obtaining a top view of a spatial structure of a laboratory, and setting the top view as the laboratory top view;
step S1012, acquiring the outline of the top view of the laboratory, setting the outline as a basic laboratory outline, reducing the basic laboratory outline according to a first proportion, and setting the reduced basic laboratory outline as the outline of a drawing of the laboratory;
step S1013, performing frame selection on the laboratory drawing outline by using the rectangle, setting the minimum rectangle capable of performing complete frame selection on the laboratory drawing outline as a basic frame selection rectangle, and setting a diagram formed by the basic frame selection rectangle and the laboratory drawing outline as a laboratory frame selection diagram;
step S1014, a plane rectangular coordinate system is established, the plane rectangular coordinate system comprises an X axis and a Y axis, grid division is carried out on the plane rectangular coordinate system, the grid is square, and the side length of the grid is a first side length;
step S1015, placing the laboratory frame selection diagram into a plane rectangular coordinate system, enabling one vertex of a basic frame selection rectangle of the laboratory frame selection diagram to coincide with one vertex of any grid in the plane rectangular coordinate system, and enabling the length and the width of the basic frame selection rectangle to be parallel to an X axis and a Y axis of the plane rectangular coordinate system respectively;
Step S1016, setting a standard dividing grid as a region capable of dividing the outline of the laboratory drawing into a complete grid, and setting a harmful gas monitoring point position in the standard dividing grid;
step S1017, setting an area which cannot be divided into a complete grid by the outline of the laboratory drawing as a to-be-divided grid, analyzing the to-be-divided grid, setting the to-be-divided grid as an edge-divided grid when the area of the to-be-divided grid is larger than that of 1/2 grid, and setting a harmful gas monitoring point position in the edge-divided grid; when the area of the to-be-divided grid is smaller than or equal to the area of the 1/2 grid, the to-be-divided grid is set as a supplementary grid, and the supplementary grid is supplemented into any one adjacent standard dividing grid.
Step S10 further comprises the sub-steps of: step S1021, acquiring the height of the spatial structure of the laboratory, and setting the height as the laboratory height;
step S1022, a three-dimensional coordinate system is established, wherein the three-dimensional coordinate system comprises an X axis, a Y axis and a Z axis, and the X axis and the Y axis of the three-dimensional coordinate system are respectively identical to the X axis and the Y axis of the plane rectangular coordinate system;
step S1023, translating the laboratory drawing outline by one laboratory height in the Z-axis extending direction, and setting the space between the translated laboratory drawing outline and the laboratory drawing outline before translation to obtain a laboratory three-dimensional structure;
Step S1024, setting a cuboid divided along the Z-axis direction by taking a standard dividing grid as a bottom surface in a three-dimensional structure of a laboratory as a standard acquisition body, and setting a harmful gas monitoring point position in the center of the standard acquisition body; setting a column body divided along the Z-axis direction by taking an edge dividing grid as a bottom surface in a three-dimensional structure of a laboratory as an edge collecting body, and setting a harmful gas monitoring point position at any position with the height of the edge collecting body being 1/2 of the height of the laboratory; the column body divided along the Z-axis direction by taking the supplement grid as the bottom surface in the three-dimensional structure of the laboratory is set as a supplement body, and the supplement body is supplemented into any adjacent standard collection body to form a new standard collection body.
Step S20, harmful gas concentration is obtained through a gas detector based on a monitoring period; step S20 comprises the following sub-steps: step S201, harmful gas concentration is obtained through a gas detector according to a preset monitoring period, and a concentration threshold value of a laboratory is obtained;
and S202, outputting harmful gas concentration exceeding the standard when the concentration of the harmful gas collected in real time is greater than a concentration threshold, and adjusting the monitoring period to be a screening period, wherein the monitoring frequency of the screening period is greater than that of the monitoring period.
Step S30, monitoring point position analysis is carried out on the over-standard harmful gas concentration obtained by the harmful gas monitoring point position, a diffusion range is obtained, and a harmful gas simulated diffusion quantity is obtained based on the diffusion range and the harmful gas concentration; step S30 comprises the following sub-steps: step S301, marking monitoring points of the concentration of the harmful gas exceeding the standard as exceeding diffusion points; acquiring a standard acquisition body or an edge acquisition body where an out-of-standard diffusion point is located, and marking the standard acquisition body or the edge acquisition body as the out-of-standard acquisition body;
step S302, setting the space region where all the out-of-standard collectors are located as a diffusion range, and multiplying the volume of each out-of-standard collector by the corresponding harmful gas concentration to obtain out-of-standard diffusion quantity; and adding all the out-of-standard diffusion amounts in the diffusion range to obtain the simulated diffusion amount of the harmful gas.
Step S40, outputting a basic early warning signal when the concentration of the harmful gas exceeding the standard is obtained, obtaining the total ventilation quantity in a single ventilation period, calculating with the simulated diffusion quantity of the harmful gas to obtain the simulated residual concentration of the harmful gas, and carrying out ventilation early warning based on the simulated residual concentration of the harmful gas; step S40 comprises the following sub-steps: step S4011, marking the monitoring points of the harmful gas with JD 1 To JD n N is equal to the number of harmful gas monitoring points;
step S4012, obtaining coordinates of each harmful gas monitoring point in a three-dimensional coordinate system, respectively marked as (X1, Y1, Z1) to (Xn, yn, zn), and the marks JD of the harmful gas monitoring points 1 To JD n Corresponding to the coordinate marks (X1, Y1, Z1) to (Xn, yn, zn), respectively;
step S4013, when the concentration of the harmful gas exceeding the standard is obtained, outputting a basic early warning signal, wherein the basic early warning signal comprises the reference mark and the coordinate mark of the harmful gas monitoring point.
Step S40 further comprises the sub-steps of: step S4021, acquiring the duration of a primary ventilation period of a laboratory ventilation system, wherein the duration is marked as a single ventilation duration;
step S4022, acquiring real-time ventilation of a laboratory ventilation system; multiplying the single ventilation time length by the real-time ventilation amount to obtain the total ventilation amount of the laboratory in one ventilation period.
Step S40 further comprises the sub-steps of: step S4031, obtaining the number n of the harmful gas monitoring points, and dividing the total ventilation quantity by n to obtain unit ventilation quantity;
step S4032, adding the unit ventilation quantity to the volume of each out-of-standard collector in the diffusion range to obtain a unit dilution volume, adding all the unit dilution volumes to obtain a total dilution volume, and dividing the harmful gas simulated diffusion quantity by the total dilution volume to obtain the residual harmful gas simulated concentration;
And step S4033, outputting a ventilation early warning signal when the simulated residual concentration of the harmful gas is greater than the concentration threshold.
Example 3
The present application also provides a storage medium having stored thereon a computer program which, when executed by a processor, performs the steps of any of the methods described above. By the above technical solution, the computer program, when executed by the processor, performs the method in any of the alternative implementations of the above embodiments to implement the following functions: according to the invention, a plurality of harmful gas monitoring points are arranged according to a spatial structure of a laboratory, a gas detector is arranged on the harmful gas monitoring points, harmful gas concentration is acquired through the gas detector based on a monitoring period, a monitoring range is defined for different harmful gas monitoring points, rapid analysis of harmful gas diffusion in the laboratory can be realized, the monitoring point analysis is carried out on the harmful gas concentration which exceeds the standard and is acquired by the harmful gas monitoring points, the diffusion range is obtained, the harmful gas simulated diffusion quantity is calculated based on the diffusion range and the harmful gas concentration, the diffusion range and the generation quantity of the harmful gas can be rapidly calculated when the harmful gas is generated, a basic early warning signal is output when the exceeding harmful gas concentration is acquired, then the total ventilation quantity in a single ventilation period is acquired, the total ventilation quantity is calculated with the harmful gas simulated diffusion quantity, the harmful gas simulated residual concentration is obtained, the basic early warning function can be realized when the harmful gas is generated in the laboratory based on the harmful gas simulated residual concentration, and further accurate early warning can be realized by combining with the ventilation result of the laboratory period.
It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media having computer-usable program code embodied therein. The storage medium may be implemented by any type of volatile or nonvolatile Memory device or combination thereof, such as static random access Memory (Static Random Access Memory, SRAM), electrically erasable Programmable Read-Only Memory (Electrically Erasable Programmable Read-Only Memory, EEPROM), erasable Programmable Read-Only Memory (Erasable Programmable Read Only Memory, EPROM), programmable Read-Only Memory (PROM), read-Only Memory (ROM), magnetic Memory, flash Memory, magnetic disk, or optical disk. These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other manners. The above-described apparatus embodiments are merely illustrative, for example, the division of the units is merely a logical function division, and there may be other manners of division in actual implementation, and for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be through some communication interface, device or unit indirect coupling or communication connection, which may be in electrical, mechanical or other form.
Claims (10)
1. The laboratory harmful gas detection and early warning method based on multi-point location monitoring is characterized by comprising the following steps of:
setting a plurality of harmful gas monitoring points based on a spatial structure of a laboratory, and setting a gas detector on the harmful gas monitoring points;
acquiring the concentration of harmful gas by a gas detector based on the monitoring period;
monitoring point position analysis is carried out on the harmful gas concentration exceeding the standard obtained by the harmful gas monitoring point position, a diffusion range is obtained, and the simulated diffusion quantity of the harmful gas is calculated based on the diffusion range and the harmful gas concentration;
And outputting a basic early warning signal when the concentration of the harmful gas exceeding the standard is obtained, obtaining the total ventilation quantity in a single ventilation period, calculating with the simulated diffusion quantity of the harmful gas to obtain the simulated residual concentration of the harmful gas, and carrying out ventilation early warning based on the simulated residual concentration of the harmful gas.
2. The laboratory harmful gas detection and early warning method based on multi-point monitoring according to claim 1, wherein the setting of a plurality of harmful gas monitoring points based on a spatial structure of a laboratory comprises the following sub-steps: acquiring a top view of a spatial structure of a laboratory, and setting the top view as the top view of the laboratory;
acquiring the outline of a top view of a laboratory, setting the outline as a basic laboratory outline, reducing the basic laboratory outline according to a first proportion, and setting the reduced basic laboratory outline as a drawing laboratory outline;
performing frame selection on the laboratory drawing outline by using a rectangle, setting a minimum rectangle capable of performing complete frame selection on the laboratory drawing outline as a basic frame selection rectangle, and setting a diagram formed by the basic frame selection rectangle and the laboratory drawing outline as a laboratory frame selection diagram;
establishing a plane rectangular coordinate system, wherein the plane rectangular coordinate system comprises an X axis and a Y axis, and dividing the plane rectangular coordinate system into grids which are square, and the side length of each grid is a first side length;
Placing the laboratory frame selection diagram into a plane rectangular coordinate system, enabling one vertex of a basic frame selection rectangle of the laboratory frame selection diagram to coincide with one vertex of any grid in the plane rectangular coordinate system, and enabling the length and the width of the basic frame selection rectangle to be parallel to an X axis and a Y axis of the plane rectangular coordinate system respectively;
setting a region which can be divided into a complete grid by the outline of the laboratory drawing as a standard dividing grid, and setting a harmful gas monitoring point position in the standard dividing grid;
setting an area which cannot be divided into a complete grid by the outline of the laboratory drawing as a to-be-divided grid, analyzing the to-be-divided grid, setting the to-be-divided grid as an edge dividing grid when the area of the to-be-divided grid is larger than that of 1/2 grid, and setting a harmful gas monitoring point in the edge dividing grid; when the area of the to-be-divided grid is smaller than or equal to the area of the 1/2 grid, the to-be-divided grid is set as a supplementary grid, and the supplementary grid is supplemented into any one adjacent standard dividing grid.
3. The laboratory harmful gas detection pre-warning method based on multi-point monitoring according to claim 2, wherein the setting of the plurality of harmful gas monitoring points based on the spatial structure of the laboratory further comprises the sub-steps of: acquiring the height of a space structure of a laboratory, and setting the height as the laboratory height;
Establishing a three-dimensional coordinate system, wherein the three-dimensional coordinate system comprises an X axis, a Y axis and a Z axis, and the X axis and the Y axis of the three-dimensional coordinate system are respectively identical to the X axis and the Y axis of the plane rectangular coordinate system;
translating the laboratory drawing outline by one laboratory height in the Z-axis extending direction, and setting the space between the translated laboratory drawing outline and the laboratory drawing outline before translation to obtain a laboratory three-dimensional structure;
setting a cuboid divided along the Z-axis direction by taking a standard dividing grid as a bottom surface in a three-dimensional structure of a laboratory as a standard acquisition body, and setting a harmful gas monitoring point position in the center of the standard acquisition body; setting a column body divided along the Z-axis direction by taking an edge dividing grid as a bottom surface in a three-dimensional structure of a laboratory as an edge collecting body, and setting a harmful gas monitoring point position at any position with the height of the edge collecting body being 1/2 of the height of the laboratory; the column body divided along the Z-axis direction by taking the supplement grid as the bottom surface in the three-dimensional structure of the laboratory is set as a supplement body, and the supplement body is supplemented into any adjacent standard collection body to form a new standard collection body.
4. The laboratory harmful gas detection and early warning method based on multi-point monitoring according to claim 1, wherein the acquisition of the harmful gas concentration by the gas detector based on the monitoring period comprises the following sub-steps: and acquiring the concentration of harmful gas through a gas detector according to a preset monitoring period, acquiring a concentration threshold of a laboratory, outputting the harmful gas concentration which exceeds the standard when the concentration of the harmful gas acquired in real time is larger than the concentration threshold, and adjusting the monitoring period into a screening period, wherein the monitoring frequency of the screening period is larger than that of the monitoring period.
5. The laboratory harmful gas detection and early warning method based on multi-point monitoring according to claim 1, wherein the monitoring point position analysis is performed on the harmful gas concentration exceeding the standard obtained by the harmful gas monitoring point position to obtain a diffusion range, and the calculation of the harmful gas simulated diffusion amount based on the diffusion range and the harmful gas concentration comprises the following sub-steps: marking the monitoring point positions of the concentration of the harmful gas exceeding the standard as exceeding the standard diffusion point positions; acquiring a standard acquisition body or an edge acquisition body where an out-of-standard diffusion point is located, and marking the standard acquisition body or the edge acquisition body as the out-of-standard acquisition body;
setting the space region where all the exceeding collecting bodies are located as a diffusion range, and multiplying the volume of each exceeding collecting body by the corresponding harmful gas concentration to obtain exceeding diffusion quantity; and adding all the out-of-standard diffusion amounts in the diffusion range to obtain the simulated diffusion amount of the harmful gas.
6. The laboratory harmful gas detection and early warning method based on multi-point location monitoring according to claim 1, wherein outputting a basic early warning signal when an out-of-standard harmful gas concentration is obtained comprises the following sub-steps: marking the monitoring points of harmful gases, and marking the monitoring points of the harmful gases as JD in sequence 1 To JD n N is equal to the number of the harmful gas monitoring points, coordinates of each harmful gas monitoring point in a three-dimensional coordinate system are obtained, and the coordinates are respectively marked as (X1, Y1, Z1) to (Xn, yn, zn), and the marks JD of the harmful gas monitoring points 1 To JD n Corresponding to the coordinate marks (X1, Y1, Z1) to (Xn, yn, zn), respectively; when the concentration of the harmful gas exceeding the standard is obtained, a basic early warning signal is output, wherein the basic early warning signal comprises the marks and the coordinate marks of the harmful gas monitoring points.
7. The laboratory harmful gas detection and early warning method based on multi-point monitoring according to claim 1, wherein the step of obtaining the total ventilation in a single ventilation cycle comprises the following sub-steps: acquiring the duration of a primary ventilation period of a laboratory ventilation system, and marking the duration as the duration of the primary ventilation period;
acquiring real-time ventilation of a laboratory ventilation system; multiplying the single ventilation time length by the real-time ventilation amount to obtain the total ventilation amount of the laboratory in one ventilation period.
8. The laboratory harmful gas detection and early warning method based on multi-point location monitoring according to claim 7, wherein the method for carrying out the ventilation early warning based on the harmful gas simulated residual concentration comprises the following sub-steps of: the method comprises the steps of obtaining the number n of harmful gas monitoring points, and dividing the total ventilation quantity by n to obtain unit ventilation quantity;
Adding the volume of each exceeding standard collector in the diffusion range to unit ventilation to obtain unit dilution volume, adding all unit dilution volumes to obtain total dilution volume, and dividing the simulated diffusion volume of the harmful gas by the total dilution volume to obtain simulated residual concentration of the harmful gas; and outputting a ventilation early warning signal when the simulated residual concentration of the harmful gas is greater than a concentration threshold value.
9. The system of the laboratory harmful gas detection early warning method based on multi-point location monitoring is characterized by comprising a monitoring point location setting module, a real-time monitoring acquisition module, a monitoring diffusion analysis module and an early warning module;
the monitoring point position setting module is used for setting a plurality of harmful gas monitoring points based on a spatial structure of a laboratory, and setting a gas detector on the harmful gas monitoring points;
the real-time monitoring acquisition module is used for acquiring the concentration of harmful gas through the gas detector based on a monitoring period;
the monitoring diffusion analysis module is used for carrying out monitoring point position analysis on the over-standard harmful gas concentration obtained by the harmful gas monitoring point position to obtain a diffusion range, and calculating the simulated diffusion quantity of the harmful gas based on the diffusion range and the harmful gas concentration;
The early warning module comprises a basic early warning unit and a ventilation early warning unit, wherein the basic early warning unit is used for outputting a basic early warning signal when the concentration of the harmful gas exceeding the standard is acquired; the ventilation early warning unit is used for obtaining the total ventilation quantity in a single ventilation period, calculating the total ventilation quantity and the harmful gas simulated diffusion quantity to obtain the harmful gas simulated residual concentration, and carrying out ventilation early warning based on the harmful gas simulated residual concentration.
10. A storage medium having stored thereon a computer program which, when executed by a processor, performs the steps of the method according to any of claims 1-8.
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