CN112880085A - Laboratory safety protection method and system based on non-constant diffusion model - Google Patents
Laboratory safety protection method and system based on non-constant diffusion model Download PDFInfo
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- CN112880085A CN112880085A CN201911197492.7A CN201911197492A CN112880085A CN 112880085 A CN112880085 A CN 112880085A CN 201911197492 A CN201911197492 A CN 201911197492A CN 112880085 A CN112880085 A CN 112880085A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F7/00—Ventilation
- F24F7/007—Ventilation with forced flow
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
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Abstract
The application provides a laboratory safety protection method and system based on a non-constant diffusion model, and the method comprises the following steps: obtaining leakage information of leaked gas in a laboratory, wherein the leakage information comprises: the type, position and speed of the leaked gas; generating a corresponding relation between the concentration of the leaked gas and each position and time in the laboratory according to a preset non-constant diffusion model; and controlling the operation of the air exhaust equipment according to the corresponding relation. This application is through acquireing gas leakage information, obtains the corresponding relation of leaking gas concentration and each position in the laboratory and time according to the invariable diffusion model of non-, and then can appoint the corresponding air exhaust strategy according to the corresponding relation and carry out the pertinence and air exhaust, can in time ensure laboratory safety on the one hand, and the other side is targeted, avoids airing exhaust to the interference in other regions in laboratory, and is further, can practice thrift costs such as power consumption.
Description
Technical Field
The invention relates to the technical field of shale gas development experiments, in particular to a laboratory safety protection method and system based on a non-constant diffusion model.
Background
The consumption of natural gas in China is continuously increased, the external dependence is also continuously increased, and the great development of unconventional shale gas has great significance for relieving the energy shortage and developing green energy in China. The shale gas development of China enters a rapid development stage, the requirement of the progress of the field development technology on the shale gas development theory is higher and higher, and the attack of the key problems in the shale gas development needs the innovation of the basic theory and the breakthrough of the experimental technology as the support. The main component of the shale gas is methane gas, in the shale gas laboratory research, in order to simulate the real environment of a shale gas reservoir as much as possible, the methane gas is required to be used as experimental gas, and because the methane gas belongs to inflammable gas, when the content of the methane gas reaches 5.0% -15.4%, the methane gas has the risk of combustion and explosion when encountering heat sources and open fire, so that certain potential safety hazards exist. Along with the development of shale gas towards deep shale gas, the requirements on experiment temperature and pressure are higher and higher, the gas quantity used in the experiment is larger and larger, the experiment period is also longer in succession, and the safety risk brought by the leakage of the experiment gas is larger and larger. With the increasing importance of the country on production safety and laboratory safety, in order to carry out shale gas seepage experiments more safely, the invention develops a laboratory safety protection system based on a non-constant diffusion model, so that the safety risk of the shale gas seepage experiments is reduced to the minimum, and the safety of laboratories and personnel is protected to the maximum extent.
Disclosure of Invention
In order to solve at least one of the above disadvantages, a first aspect of the present application provides a laboratory safety protection method based on a non-constant diffusion model, including:
obtaining leakage information of leaked gas in a laboratory, wherein the leakage information comprises: the type, position and speed of the leaked gas;
generating a corresponding relation between the concentration of the leaked gas and each position and time in the laboratory according to a preset non-constant diffusion model;
and controlling the operation of the air exhaust equipment according to the corresponding relation.
In some embodiments, the obtaining leakage information of the leaked gas in the laboratory includes:
detecting the concentration and the type of leaked gas in real time through gas detectors distributed at preset positions in the laboratory;
and calculating the leakage position according to the concentration difference of the leakage gas detected by all the gas detectors.
In some embodiments, further comprising:
and establishing the non-constant diffusion model.
In certain embodiments, the non-constant diffusion model is:
in the formula, c (x, y, z, t) represents the concentration caused at a certain spatial point (x, y, z) after t time when the gas source discharged instantaneously from the origin (0, 0, 0) at the time t is 0; q is the leakage rate; c is the gas mass concentration of any point; gamma ray1、γ2Is the diffusion parameter coefficient; t is the duration of calm wind; Δ H is the gas lift height.
In some embodiments, said controlling the operation of the air exhausting device according to the correspondence includes:
determining the time point when the gas concentration of each position in the laboratory reaches the corresponding threshold value according to the corresponding relation and the preset threshold value distribution of the gas concentration in the laboratory;
determining the position and the predicted time point of the gas concentration which reaches the corresponding threshold value fastest;
generating an exhaust equipment control strategy according to the determined position and the predicted time point;
and controlling the operation of the air exhausting equipment according to the air exhausting equipment control strategy.
In some embodiments, the exhaust device comprises a plurality of exhaust fans, each exhaust fan corresponding to a designated area in the laboratory;
generating an exhaust equipment control strategy according to the determined position and the predicted time point, comprising:
determining a designated area where the position is located according to the determined position;
determining to start a corresponding exhaust fan according to the determined designated area;
and determining the starting time and the starting power of the exhaust fan according to the time length between the current time point and the predicted time point, the gas leakage speed and the preset leakage processing time length.
The application provides a laboratory safety protection system based on non-constant diffusion model in a second aspect, including:
the leakage information acquisition module acquires leakage information of leaked gas in a laboratory, wherein the leakage information comprises: the type, position and speed of the leaked gas;
the corresponding relation generating module is used for generating corresponding relations between the concentration of the leaked gas and each position and time in the laboratory according to a preset non-constant diffusion model;
and the operation control module of the air exhaust equipment controls the operation of the air exhaust equipment according to the corresponding relation.
In some embodiments, the leakage information obtaining module includes:
the real-time detection unit is used for detecting the concentration and the type of leaked gas in real time through gas detectors distributed at preset positions in the laboratory;
and the leakage position calculation unit is used for calculating the leakage position according to the concentration difference of the leakage gas detected by all the gas detectors.
In some embodiments, further comprising:
and the model establishing module is used for establishing the non-constant diffusion model.
In certain embodiments, the non-constant diffusion model is:
in the formula, c (x, y, z, t) represents the concentration caused at a certain spatial point (x, y, z) after t time when the gas source discharged instantaneously from the origin (0, 0, 0) at the time t is 0; q is the leakage rate; c is the gas mass concentration of any point; gamma ray1、γ2Is the diffusion parameter coefficient; t is the duration of calm wind; Δ H is the gas lift height.
In some embodiments, the exhaust device operation control module comprises:
the threshold reaching time point determining unit is used for determining the time point of the gas concentration at each position in the laboratory reaching the corresponding threshold according to the corresponding relation and the preset gas concentration threshold distribution in the laboratory;
the fastest arrival threshold determining unit is used for determining the position and the predicted time point of the fastest arrival of the gas concentration at the corresponding threshold;
the air exhaust equipment control strategy generating unit generates an air exhaust equipment control strategy according to the determined position and the predicted time point;
and the air exhaust equipment operation control unit controls the operation of the air exhaust equipment according to the air exhaust equipment control strategy.
In some embodiments, the exhaust device comprises a plurality of exhaust fans, each exhaust fan corresponding to a designated area in the laboratory;
the exhaust equipment control strategy generating unit comprises:
a designated area determining unit that determines a designated area in which the position is located, based on the determined position;
the exhaust fan starting unit is used for determining to start the corresponding exhaust fan according to the determined designated area;
and the opening time and power determining unit is used for determining the opening time and the opening power of the exhaust fan according to the time length between the current time point and the predicted time point, the gas leakage speed and the preset leakage processing time length.
An embodiment of the third aspect of the present application provides an electronic device, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, and when the processor executes the program, the steps of the non-constant diffusion model-based laboratory security protection method described above are implemented.
A fourth aspect of the present application provides a computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, implements the steps of the non-constant diffusion model-based laboratory safety protection method as described above.
The beneficial effect of this application is as follows:
the application provides a laboratory safety protection method and system based on non-constant diffusion model, through obtaining gas leakage information, obtain the corresponding relation of leaking gas concentration and each position and time in the laboratory according to non-constant diffusion model, and then can appoint the corresponding air exhaust strategy according to the corresponding relation and carry out the pertinence and exhaust, can in time ensure laboratory safety on the one hand, and the other hand is pointed, avoids exhausting the interference to other regions in the laboratory, and is further, can practice thrift costs such as power consumption.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 shows a flow diagram of a laboratory safety protection method based on a non-constant diffusion model in an embodiment of the present application.
Fig. 2 shows a schematic structural diagram of a laboratory safety protection system based on a non-constant diffusion model in an embodiment of the present application.
Fig. 3 shows a schematic structural diagram of an electronic device suitable for implementing embodiments of the present application.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1 shows a schematic flow chart of a laboratory safety protection method based on a non-constant diffusion model in an embodiment of the present application, as shown in fig. 1, specifically including:
s1: obtaining leakage information of leaked gas in a laboratory, wherein the leakage information comprises: the type, position and speed of the leaked gas;
s2: generating a corresponding relation between the concentration of the leaked gas and each position and time in the laboratory according to a preset non-constant diffusion model;
s3: and controlling the operation of the air exhaust equipment according to the corresponding relation.
According to the laboratory safety protection method based on the non-constant diffusion model, the corresponding relation between the concentration of leaked gas and each position and time in the laboratory is obtained according to the non-constant diffusion model by obtaining the gas leakage information, and then the corresponding exhaust strategy can be appointed according to the corresponding relation to conduct targeted exhaust, on one hand, the safety of the laboratory can be guaranteed in time, on the other hand, the pertinence is achieved, the interference of exhaust to other areas of the laboratory is avoided, and further, the cost of electricity utilization and the like can be saved.
In some embodiments, step S1 specifically includes:
s11: detecting the concentration and the type of leaked gas in real time through gas detectors distributed at preset positions in the laboratory;
s12: and calculating the leakage position according to the concentration difference of the leakage gas detected by all the gas detectors.
Gaseous detector generally sets up each position in the laboratory according to balanced principle, and gaseous detector generally can detect combustible gas such as sulfur dioxide, sulfur trioxide, methane, hydrogen, and this application does not do the restriction to gaseous detector, can set up according to particular case, for example in the oil exploration field, and main detected gas is methane, and gaseous detector can be the methane detector so, can detect the concentration of methane.
In some embodiments, in step S12, for example, 4 gas detectors are disposed in a certain area, four gas detectors correspondingly form a rectangle (virtual), 4 gas detectors are a, b, c, d, from the preset positions, the distances between the 4 gas detectors can be known, assuming that the distance ratio corresponds to the concentration ratio, further, the respective concentration ratios are calculated based on the respective detected concentrations, and for example, if the detected concentration of a is twice the detected concentration of b, it is considered that the distance between the leaking gas and a is twice the distance between the leaking gas and b, and of course, in practice, the concentration ratio is not linear with distance, and a non-linear correspondence can be experimentally explored (e.g., a concentration ratio-distance ratio curve is plotted), according to this non-linear correspondence, the location of the leaking gas is anchored with 4 gas detectors.
In some embodiments, the comparison may be performed by mapping locations of possible leaks in conjunction with a pre-set laboratory configuration to provide accuracy.
Further, because the position of most laboratory gas leakage is often fixed in some specific devices, such as pipeline, instrument opening etc. can set up a plurality of possible gas leakage's position in advance like this, then select the position that the possibility is the highest according to the concentration of gas detector, and then need not adopt a plurality of gas detectors to anchor the position of leaking, need not waste too much energy to the laboratory of simple setting.
In some embodiments, the above method further comprises:
and establishing the non-constant diffusion model.
Specifically, the non-constant diffusion model is as follows:
in the formula, c (x, y, z, t) represents the concentration caused at a certain spatial point (x, y, z) after t time when the gas source discharged instantaneously from the origin (0, 0, 0) at the time t is 0; q is the leakage rate; c is the gas mass concentration of any point; gamma ray1、γ2Is the diffusion parameter coefficient; t is the duration of calm wind; Δ H is the gas lift height.
It can be known that the model can calculate the gas concentration at each time of each position, so a correspondence table or a correspondence curve and the like can be drawn according to the information, and an exhaust strategy, such as when to start exhaust, power to turn on, which exhaust devices to turn on, duration to turn on and the like, is specified according to the correspondence table or the correspondence curve.
In this embodiment, step S3 specifically includes:
s31: determining the time point when the gas concentration of each position in the laboratory reaches the corresponding threshold value according to the corresponding relation and the preset threshold value distribution of the gas concentration in the laboratory;
s32: determining the position and the predicted time point of the gas concentration which reaches the corresponding threshold value fastest;
s33: generating an exhaust equipment control strategy according to the determined position and the predicted time point;
s34: and controlling the operation of the air exhausting equipment according to the air exhausting equipment control strategy.
The threshold distribution of the gas concentration in the laboratory can be represented in the form of a three-dimensional graph, a data table and the like, for example, a three-dimensional bar graph, the height of a column represents the threshold, and the position of the column corresponds to the coordinates of the position of the laboratory, so that the gas concentration threshold at each position of the laboratory can be represented.
For safety, the air exhaust strategy is set according to the position and the time point of the fastest reaching threshold value, so that the phenomena of local explosion, local casualties and the like caused by overhigh local concentration are avoided.
In some embodiments, the exhaust device comprises a plurality of exhaust fans, each exhaust fan corresponding to a designated area within the laboratory. In this embodiment, step S33 specifically includes:
determining a designated area where the position is located according to the determined position;
determining to start a corresponding exhaust fan according to the determined designated area;
and determining the starting time and the starting power of the exhaust fan according to the time length between the current time point and the predicted time point, the gas leakage speed and the preset leakage processing time length.
For example, if the difference between the current time point and the expected time point is 2 minutes, and in order to avoid that the gas concentration reaches the threshold value at the corresponding position when the expected time point is reached, the corresponding exhaust fan needs to be started, according to the corresponding relation between the power of the exhaust fan and the exhaust speed which can be known in advance, for example, it can be inferred that if the exhaust fan is set to be full load, the leaked gas can be completely exhausted within 3 minutes, and in combination with the speed of the subsequent gas, the lowest load, for example, one tenth of the full load, is taken as the tentative load power, it is calculated whether the full load gas reaches the threshold value at the position because the exhaust speed of the leaked gas is greater than the exhaust speed in the following case, for example, it is calculated that if the exhaust fan is operated according to the power of 1/10, the leaked gas still reaches the threshold value after 10 minutes, the tentative, until it is calculated that the concentration of the leaking gas cannot reach the threshold value within a set processing time (e.g., within 2 hours of personnel processing time).
Can know, the laboratory safety protection method based on invariable diffusion model that this application first aspect provided, through invariable diffusion model of non-, through obtaining gas leakage information, obtain the corresponding relation of leaking gas concentration and each position and time in the laboratory according to invariable diffusion model of non-, and then can appoint the corresponding air exhaust strategy according to the corresponding relation and carry out the pertinence and exhaust, can in time ensure laboratory safety on the one hand, the other side is pointed, avoid exhausting the interference to other regions in laboratory, furthermore, can practice thrift costs such as power consumption.
Based on the same inventive concept as the embodiment of the first aspect of the present application, as shown in fig. 2, the second aspect of the present application provides a laboratory safety protection system based on a non-constant diffusion model, comprising: the leakage information acquisition module 1 acquires leakage information of leaked gas in a laboratory, wherein the leakage information comprises: the type, position and speed of the leaked gas; the corresponding relation generating module 2 is used for generating corresponding relations between the concentration of the leaked gas and each position and time in the laboratory according to a preset non-constant diffusion model; and the air exhaust equipment operation control module 3 controls the operation of the air exhaust equipment according to the corresponding relation.
The laboratory safety protection system based on invariable diffusion model that this application second aspect provided, through invariable diffusion model, through obtaining gas leakage information, obtain the corresponding relation of leaking gas concentration and each position and time in the laboratory according to invariable diffusion model of non-, and then can appoint the corresponding air exhaust strategy according to the corresponding relation and carry out the pertinence and exhaust, can in time ensure laboratory safety on the one hand, the other side is targeted, avoid exhausting the interference to other regions in laboratory, furthermore, can practice thrift costs such as power consumption.
Based on the same inventive concept, in some embodiments, the leakage information acquiring module includes:
the real-time detection unit is used for detecting the concentration and the type of leaked gas in real time through gas detectors distributed at preset positions in the laboratory;
and the leakage position calculation unit is used for calculating the leakage position according to the concentration difference of the leakage gas detected by all the gas detectors.
Based on the same inventive concept, in some embodiments, the method further comprises:
and the model establishing module is used for establishing the non-constant diffusion model.
Based on the same inventive concept, in some embodiments, the non-constant diffusion model is:
in the formula, c (x, y, z, t) represents the concentration caused at a certain spatial point (x, y, z) after t time when the gas source discharged instantaneously from the origin (0, 0, 0) at the time t is 0; q is the leakage rate; c is the gas mass concentration of any point; gamma ray1、γ2Is the diffusion parameter coefficient; t is the duration of calm wind; Δ H is the gas lift height.
Based on the same inventive concept, in some embodiments, the exhaust device operation control module includes:
the threshold reaching time point determining unit is used for determining the time point of the gas concentration at each position in the laboratory reaching the corresponding threshold according to the corresponding relation and the preset gas concentration threshold distribution in the laboratory;
the fastest arrival threshold determining unit is used for determining the position and the predicted time point of the fastest arrival of the gas concentration at the corresponding threshold;
the air exhaust equipment control strategy generating unit generates an air exhaust equipment control strategy according to the determined position and the predicted time point;
and the air exhaust equipment operation control unit controls the operation of the air exhaust equipment according to the air exhaust equipment control strategy.
Based on the same inventive concept, in some embodiments, the exhaust device includes a plurality of exhaust fans, each exhaust fan corresponding to a designated area in the laboratory;
the exhaust equipment control strategy generating unit comprises:
a designated area determining unit that determines a designated area in which the position is located, based on the determined position;
the exhaust fan starting unit is used for determining to start the corresponding exhaust fan according to the determined designated area;
and the opening time and power determining unit is used for determining the opening time and the opening power of the exhaust fan according to the time length between the current time point and the predicted time point, the gas leakage speed and the preset leakage processing time length.
An embodiment of the present application further provides a specific implementation manner of an electronic device capable of implementing all steps in the method in the foregoing embodiment, and referring to fig. 3, the electronic device specifically includes the following contents:
a processor (processor)601, a memory (memory)602, a communication Interface (Communications Interface)603, and a bus 604;
the processor 601, the memory 602 and the communication interface 603 complete mutual communication through the bus 604;
the processor 601 is used to call the computer program in the memory 602, and when the processor executes the computer program, the processor implements all the steps of the method in the above embodiments.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the hardware + program class embodiment, since it is substantially similar to the method embodiment, the description is simple, and the relevant points can be referred to the partial description of the method embodiment. Although embodiments of the present description provide method steps as described in embodiments or flowcharts, more or fewer steps may be included based on conventional or non-inventive means. The order of steps recited in the embodiments is merely one manner of performing the steps in a multitude of orders and does not represent the only order of execution. When an actual apparatus or end product executes, it may execute sequentially or in parallel (e.g., parallel processors or multi-threaded environments, or even distributed data processing environments) according to the method shown in the embodiment or the figures. The terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, the presence of additional identical or equivalent elements in a process, method, article, or apparatus that comprises the recited elements is not excluded. For convenience of description, the above devices are described as being divided into various modules by functions, and are described separately. Of course, in implementing the embodiments of the present description, the functions of each module may be implemented in one or more software and/or hardware, or a module implementing the same function may be implemented by a combination of multiple sub-modules or sub-units, and the like. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form. The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks. As will be appreciated by one skilled in the art, embodiments of the present description may be provided as a method, system, or computer program product. Accordingly, embodiments of the present description may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, embodiments of the present description may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and so forth) having computer-usable program code embodied therein. The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the system embodiment, since it is substantially similar to the method embodiment, the description is simple, and for the relevant points, reference may be made to the partial description of the method embodiment. In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of an embodiment of the specification. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction. The above description is only an example of the embodiments of the present disclosure, and is not intended to limit the embodiments of the present disclosure. Various modifications and variations to the embodiments described herein will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the embodiments of the present specification should be included in the scope of the claims of the embodiments of the present specification.
Claims (14)
1. A laboratory safety protection method based on a non-constant diffusion model is characterized by comprising the following steps:
obtaining leakage information of leaked gas in a laboratory, wherein the leakage information comprises: the type, position and speed of the leaked gas;
generating a corresponding relation between the concentration of the leaked gas and each position and time in the laboratory according to a preset non-constant diffusion model;
and controlling the operation of the air exhaust equipment according to the corresponding relation.
2. The laboratory safety protection method according to claim 1, wherein the obtaining of the leakage information of the leaked gas in the laboratory comprises:
detecting the concentration and the type of leaked gas in real time through gas detectors distributed at preset positions in the laboratory;
and calculating the leakage position according to the concentration difference of the leakage gas detected by all the gas detectors.
3. The laboratory safety protection method according to claim 1, further comprising:
and establishing the non-constant diffusion model.
4. The laboratory safety protection method according to claim 3, wherein the non-constant diffusion model is:
in the formula, c (x, y, z, t) represents the concentration caused at a certain spatial point (x, y, z) after t time when the gas source discharged instantaneously from the origin (0, 0, 0) at the time t is 0; q is the leakage rate; c is the gas mass concentration of any point; gamma ray1、γ2Is the diffusion parameter coefficient; t is the duration of calm wind; Δ H is the gas lift height.
5. The laboratory safety protection method according to claim 1, wherein the controlling the operation of the air exhausting device according to the corresponding relationship comprises:
determining the time point when the gas concentration of each position in the laboratory reaches the corresponding threshold value according to the corresponding relation and the preset threshold value distribution of the gas concentration in the laboratory;
determining the position and the predicted time point of the gas concentration which reaches the corresponding threshold value fastest;
generating an exhaust equipment control strategy according to the determined position and the predicted time point;
and controlling the operation of the air exhausting equipment according to the air exhausting equipment control strategy.
6. The laboratory safety protection method according to claim 5, wherein the exhaust device comprises a plurality of exhaust fans, each exhaust fan corresponding to a designated area in the laboratory;
generating an exhaust equipment control strategy according to the determined position and the predicted time point, comprising:
determining a designated area where the position is located according to the determined position;
determining to start a corresponding exhaust fan according to the determined designated area;
and determining the starting time and the starting power of the exhaust fan according to the time length between the current time point and the predicted time point, the gas leakage speed and the preset leakage processing time length.
7. A laboratory safety protection system based on a non-constant diffusion model, comprising:
the leakage information acquisition module acquires leakage information of leaked gas in a laboratory, wherein the leakage information comprises: the type, position and speed of the leaked gas;
the corresponding relation generating module is used for generating corresponding relations between the concentration of the leaked gas and each position and time in the laboratory according to a preset non-constant diffusion model;
and the operation control module of the air exhaust equipment controls the operation of the air exhaust equipment according to the corresponding relation.
8. The laboratory safety protection system according to claim 7, wherein said leakage information acquisition module comprises:
the real-time detection unit is used for detecting the concentration and the type of leaked gas in real time through gas detectors distributed at preset positions in the laboratory;
and the leakage position calculation unit is used for calculating the leakage position according to the concentration difference of the leakage gas detected by all the gas detectors.
9. The laboratory safety protection system according to claim 7, further comprising:
and the model establishing module is used for establishing the non-constant diffusion model.
10. The laboratory safety protection system of claim 9, wherein the non-constant diffusion model is:
in the formula, c (x, y, z, t) represents the concentration caused at a certain spatial point (x, y, z) after t time when the gas source discharged instantaneously from the origin (0, 0, 0) at the time t is 0; q is the leakage rate; c is the gas mass concentration of any point; gamma ray1、γ2Is the diffusion parameter coefficient; t is the duration of calm wind; Δ H is the gas lift height.
11. The laboratory safety protection system of claim 7, wherein the exhaust device operation control module comprises:
the threshold reaching time point determining unit is used for determining the time point of the gas concentration at each position in the laboratory reaching the corresponding threshold according to the corresponding relation and the preset gas concentration threshold distribution in the laboratory;
the fastest arrival threshold determining unit is used for determining the position and the predicted time point of the fastest arrival of the gas concentration at the corresponding threshold;
the air exhaust equipment control strategy generating unit generates an air exhaust equipment control strategy according to the determined position and the predicted time point;
and the air exhaust equipment operation control unit controls the operation of the air exhaust equipment according to the air exhaust equipment control strategy.
12. The laboratory safety system according to claim 11, wherein the exhaust device comprises a plurality of exhaust fans, each exhaust fan corresponding to a designated area within the laboratory;
the exhaust equipment control strategy generating unit comprises:
a designated area determining unit that determines a designated area in which the position is located, based on the determined position;
the exhaust fan starting unit is used for determining to start the corresponding exhaust fan according to the determined designated area;
and the opening time and power determining unit is used for determining the opening time and the opening power of the exhaust fan according to the time length between the current time point and the predicted time point, the gas leakage speed and the preset leakage processing time length.
13. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the method of any of claims 1 to 6 when executing the program.
14. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the method of any one of claims 1 to 6.
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