An environmental safety assessment method, device, equipment and medium

Abstract

The present disclosure relates to an environmental safety evaluation method, device, equipment and medium, the method comprising: determining the characteristic parameters of the exhibition materials releasing pollutants, the characteristic parameters including: initial dispersible concentration, diffusion coefficient and interface distribution coefficient; establishing a database according to the exhibition materials, a plurality of pollutants corresponding to the exhibition materials and the characteristic parameters corresponding to each pollutant; obtaining the first characteristic parameters of the target pollutants released by the target exhibition materials of various types in the exhibition space from the database; dividing each target exhibition material into a plurality of micro-element nodes; predicting the change of the predicted concentration of the target pollutants released by each micro-element node in the exhibition space with the change of the emission time according to the first characteristic parameters through a first concentration simulation model, and the predicted concentration is used for evaluating the safety of the environment in the exhibition space. The present disclosure can improve the accuracy of the environmental safety evaluation of the museum exhibition materials.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of environmental safety, and particularly relates to an environmental safety evaluation method, device, equipment and medium. BACKGROUND

[0002] The current methods for evaluating the environmental safety of museum exhibition materials mainly include the Oddy method and its improved methods, and the related methods in the field of building materials. The Oddy method and its improved methods have been preliminarily applied to the safety evaluation of museum exhibition materials, but there are still many differences between the test conditions such as the amount of test materials, the types of test materials, and the test temperature and the actual exhibition environment conditions. The Oddy method and its improved methods can only qualitatively reflect the types and concentrations of some pollutants of the exhibition materials, and it is difficult to quantitatively simulate the types and actual concentrations of the pollutants in the actual exhibition environment, and it is also difficult to scientifically and reasonably determine the types and amount of the exhibition materials.

[0003] For the current test method of the pollutant release amount of building materials, the test conditions are closer to the actual exhibition environment conditions than the Oddy method, but there are still some limitations in the application of the test method in the safety evaluation and screening of museum exhibition materials, such as the differences in temperature and humidity environment and air exchange rate conditions, the differences between the test conditions and the actual museum exhibition environment, the differences between the test items and the application of the exhibition materials, and the fact that the test results cannot accurately represent the actual concentration of pollutants in the environment at any time during the exhibition of the exhibits.

[0004] Therefore, the accuracy of the current evaluation of the environmental safety of museum exhibition materials is low. SUMMARY

[0005] In order to solve the above technical problems, the present disclosure provides an environmental safety evaluation method, device, equipment and medium.

[0006] According to an aspect of the present disclosure, an environmental safety evaluation method is provided, which comprises:

[0007] determining the characteristic parameters of the exhibition materials releasing a plurality of pollutants, the characteristic parameters including initial dispersible concentration, diffusion coefficient and interfacial distribution coefficient;

[0008] establishing a database according to the exhibition materials, a plurality of pollutants corresponding to the exhibition materials, and the characteristic parameters corresponding to each of the pollutants;

[0009] obtaining the first characteristic parameters of the target pollutants released by a plurality of target exhibition materials in the exhibition space from the database;

[0010] dividing each of the target exhibition materials into a plurality of micro-element nodes;

[0011] predicting, by a first concentration simulation model, a change in the predicted concentration of the target pollutant released by each of the micro-element nodes in the exhibition space over time according to the first characteristic parameter; wherein the predicted concentration is used to evaluate the safety of the environment in the exhibition space.

[0012] According to an aspect of the present disclosure, an environment safety evaluation device is also provided, comprising:

[0013] a parameter determination module configured to determine characteristic parameters of a plurality of pollutants released by the exhibition material, the characteristic parameters including an initial releasable concentration, a diffusion coefficient, and an interfacial distribution coefficient;

[0014] a database establishment module configured to establish a database according to the exhibition material, the plurality of pollutants corresponding to the exhibition material, and the characteristic parameters corresponding to each of the pollutants;

[0015] a parameter acquisition module configured to acquire, from the database, first characteristic parameters of target pollutants released by a plurality of types of target exhibition materials in an exhibition space;

[0016] a node division module configured to divide each of the target exhibition materials into a plurality of micro-element nodes;

[0017] a concentration prediction module configured to predict, by a first concentration simulation model, a change in the predicted concentration of the target pollutant released by each of the micro-element nodes in the exhibition space over time according to the first characteristic parameter; wherein the predicted concentration is used to evaluate the safety of the environment in the exhibition space.

[0018] According to an aspect of the present disclosure, an electronic device is also provided, comprising:

[0019] a processor;

[0020] a memory for storing executable instructions of the processor;

[0021] the processor is configured to read the executable instructions from the memory and execute the instructions to implement the above method.

[0022] According to an aspect of the present disclosure, a computer readable storage medium is also provided, the storage medium storing a computer program for executing the above method.

[0023] The technical solution provided by the embodiments of the present disclosure has the following advantages compared with the prior art:

[0024] The environment safety evaluation method, device, equipment and medium provided by the embodiment of the present disclosure, the method comprises: determining the characteristic parameters of the exhibition materials releasing a plurality of pollutants, the characteristic parameters comprising: initial dispersible concentration, diffusion coefficient and interface distribution coefficient; establishing a database according to the exhibition materials, the plurality of pollutants corresponding to the exhibition materials and the characteristic parameters corresponding to each pollutant; obtaining the first characteristic parameters of the target pollutants released by the target exhibition materials of a plurality of types in the exhibition space from the database; dividing each of the target exhibition materials into a plurality of micro-element nodes; predicting the change of the predicted concentration of the target pollutants released by each of the micro-element nodes in the exhibition space with the change of the emission time according to the first characteristic parameters through a first concentration simulation model, and the predicted concentration is used for evaluating the safety of the environment in the exhibition space.

[0025] The database of the characteristic parameters of different pollutants of the exhibition materials established by the embodiment can provide convenience for users to query the characteristic parameters and improve the parameter query efficiency; the pollutant concentration is predicted according to the database and the first concentration simulation model, the predicted concentration with high accuracy can be obtained, and then the environment safety is evaluated by using the predicted concentration, which can not only improve the accuracy of the safety evaluation result, but also better solve the defects existing in the prior art, realize the prior control of the types and amounts of the exhibition materials, prevent and control the pollutant concentration from exceeding the standard from the source, and realize the accurate evaluation of the environment safety of the museum exhibition materials. BRIEF DESCRIPTION OF DRAWINGS

[0026] The accompanying drawings, which are incorporated into and form part of the specification, illustrate embodiments consistent with the present disclosure and, together with the specification, serve to explain the principles of the present disclosure.

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure or the prior art, the accompanying drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, for those skilled in the art, other drawings can also be obtained without creative labor based on these drawings.

[0028] Figure 1 The environment safety evaluation method flowchart of the embodiment of the present disclosure;

[0029] Figure 2 The application scenario diagram of the database of the embodiment of the present disclosure;

[0030] Figure 3 The pollutant emission model diagram of the embodiment of the present disclosure;

[0031] Figure 4 The environment safety evaluation process diagram of the embodiment of the present disclosure;

[0032] Figure 5A structural block diagram of the environment safety evaluation device according to an embodiment of the present disclosure is shown in the figure;

[0033] Figure 6 A structural schematic diagram of the electronic device according to an embodiment of the present disclosure is shown in the figure. DETAILED DESCRIPTION

[0034] In order to more clearly understand the above-mentioned purposes, features and advantages of the present disclosure, the schemes of the present disclosure will be further described below. It should be noted that the embodiments of the present disclosure and the features in the embodiments can be combined with each other without conflict.

[0035] In the following description, many specific details are set forth in order to provide a thorough understanding of the present disclosure, but the present disclosure can also be implemented in other ways different from those described herein; obviously, the embodiments in the description are only some of the embodiments of the present disclosure, not all the embodiments.

[0036] The current methods for evaluating the environment safety of museum exhibition materials mainly include Oddy method and its improved methods, and related methods in the field of building materials. The basic principle of Oddy method is that metal test pieces are used to represent metal cultural relics, and the environment safety and applicability of materials in museum exhibition are evaluated according to the corrosion degree of the test pieces by accelerated corrosion experiment. Oddy method and its improved methods have been preliminarily applied to the safety evaluation of museum exhibition materials, but still have many limitations, such as the following points: (1) The amount of test material is relatively small, only about 1-2g, and the amount of pollutant emission is very limited, which is difficult to represent the damage effect of pollutants on cultural relics in the real exhibition environment; (2) The test temperature is about 60℃, while the actual exhibition environment is usually controlled at about 20℃, and the release process of pollutants is different; (3) Only silver sheet, copper sheet and lead sheet (or thin film metal test piece) are used in the test, which can only reflect the corrosion of pollutants that can react with the three metals on the metals, and the corrosion effect of the three metal sheets is difficult to comprehensively reflect the influence of gaseous pollutants released by the actual exhibition materials on different exhibits; (4) Based on Oddy method and its improved methods, only the types and concentrations of some pollutants in the exhibition materials can be qualitatively reflected, i.e. whether the released gaseous pollutants contain acidic gas, sulfur-containing gas and chlorine-containing gas, and whether they exist in large quantities in the material, etc., it is difficult to quantitatively simulate the types and actual concentrations of pollutants in the actual exhibition environment, and it is impossible to scientifically and reasonably determine the types and amount of exhibition materials.

[0037] For the current building material pollutant release amount test method, the dryer method or the environmental chamber method is usually used to test the release amount of pollutants, the test results are compared with the relevant material limit indicators, and whether the product is qualified is determined according to whether the test results meet the index requirements, so as to confirm the safety of the product. The test conditions of the related methods in the field of building materials are closer to the actual exhibition environment conditions compared with the Oddy method. The test results can not only qualitatively describe the types of pollutants, but also give quantitative analysis results. However, there are still some limitations in the application of the Oddy method in the safety evaluation and screening of museum exhibition materials, such as the following points: (1) The test conditions in the existing indoor building material safety evaluation standards are basically temperature 23℃, relative humidity about 50%, and air exchange rate 1h -1 In fact, different materials require different preservation temperature and humidity environments and air exchange rate conditions, and there are differences between the test conditions and the actual museum exhibition environment. (2) The release of pollutants in the existing indoor building material safety evaluation standards mainly focuses on formaldehyde and volatile organic compounds (boiling point 50℃-260℃), and does not focus on the release of small molecule oxidizing gas pollutants such as formic acid, acetic acid and small molecule chlorine-containing and sulfur-containing gases. The test items are different from the application of exhibition materials. (3) The test results are the release amount of gaseous pollutants at a certain time point. In the actual environment, the release amount of pollutants will change over time, and the release amount of pollutants measured at a certain time point cannot represent the actual concentration of pollutants in the environment at any time during the exhibition of the exhibits.

[0038] Therefore, in order to effectively improve the problem of poor accuracy of the existing technology in evaluating the environmental safety of museum exhibition materials, the embodiments of the present disclosure provide an environmental safety evaluation method, device, equipment and medium. For ease of understanding, the embodiments of the present disclosure are described as follows.

[0039] Figure 1 A flowchart of an environmental safety evaluation method provided by the embodiments of the present disclosure is shown in FIG. 1. The method can be executed by an environmental safety evaluation device, which can be implemented by software and / or hardware. As shown in FIG. 1, the environmental safety evaluation method can include the following steps. Figure 1

[0040] ​Step S101, measure the characteristic parameters of the exhibition material releasing multiple pollutants, the characteristic parameters including: initial releasable concentration, diffusion coefficient and interface distribution coefficient. Wherein, the exhibition material has multiple: carpet, paint (such as water-based paint, fireproof paint, adhesive), board (such as large core board, PVC (Polyvinyl chloride) board) and the like. The pollutants that the above exhibition material can cause are, such as: aldehyde ketone (such as formaldehyde), TVOC (Total Volatile Organic Compounds), organic acid (such as formic acid, acetic acid), benzene series (such as benzene, toluene, xylene) and the like.

[0041] The pollutants caused by the exhibition material seriously affect the air quality, and it is extremely necessary to measure the key characteristic parameters affecting the emission characteristics of the exhibition material. The characteristic parameters usually include: initial releasable concentration: which can be expressed as C0, unit μg / m 3 ; diffusion coefficient: which can be expressed as D, unit m 2 / s; interface distribution coefficient, which can be expressed as K.

[0042] In an embodiment of measuring the characteristic parameters of the exhibition material releasing multiple pollutants, the C-history method can be used to detect the equilibrium concentration and the dynamic concentration changing with time of each of the multiple pollutants released by the exhibition material in the test cabin under the preset experimental conditions.

[0043] In order to be closer to the real museum exhibition environment, the experimental conditions in the test cabin can be set as: temperature 25℃, relative humidity 50%; under the experimental conditions, the exhibition material to be tested is placed in the closed test cabin for natural emission. The air exchange rate Q = 0; the initial pollutant concentration is 0. Through the experiment, the equilibrium concentration y equ of a certain pollutant (such as formaldehyde, TVOC, formic acid, etc.) is measured based on the C-history method; and the dynamic concentration y(t) of the pollutant changing with time within the preset emission time (such as 12 hours) is recorded.

[0044] Based on the above equilibrium concentration and dynamic concentration, the characteristic parameters corresponding to each pollutant are calculated.

[0045] In the specific calculation, the following formulas (1), (2) can be referred to:

[0046]

[0047]

[0048] Wherein, C0 represents the initial releasable concentration of the pollutant, K represents the interface distribution coefficient, t represents the release time, D represents the diffusion coefficient of the pollutant, L represents the thickness of the exhibition material, and β represents the ratio between the volume of the exhibition material and the volume of the test chamber.

[0049] β = AL / V; A represents the surface area of the exhibition material, and V represents the volume of the test chamber.

[0050]

[0051] Wherein, Bi m = h m L / D, h m represents the convective mass transfer coefficient; q n is the positive root of equation .

[0052] In view of the fact that, under ideal conditions, for the summation term of the exponent on the right side of equation (1), when time t is large, only the term of n = 1 is dominant and other terms can be neglected, for the above equation, taking n = 1 can obtain the following equation (3):

[0053]

[0054] Taking the logarithm of both sides of equation (3) obtains:

[0055]

[0056] Thus, there is:

[0057]

[0058] Wherein,

[0059] Next, linear fitting is performed with ln(y equ -y(t)) / y equ as the vertical axis and time t as the horizontal axis, and thus the slope and intercept can be obtained. The slope and intercept are functions of the diffusion coefficient D and the interface distribution coefficient K, and thus D and K can be obtained according to SL and lnT respectively; and the initial releasable concentration C0 can be obtained according to y equ = C0β / (Kβ+1).

[0060] According to the above embodiment, the characteristic parameters of various exhibition materials with respect to various pollutants can be determined.

[0061] Step S102, a database is established according to the exhibition material, various pollutants corresponding to the exhibition material, and the characteristic parameters corresponding to each pollutant.

[0062] According to step S101, a plurality of characteristic parameters of the display materials with respect to a plurality of pollutants can be obtained. Based on this, referring to Figure 2 and Table 1, the name of the display material whose characteristic parameters have been measured, the types and / or names of the plurality of pollutants corresponding to the display material, and the respective characteristic parameters of each pollutant, including the initial emission concentration, the diffusion coefficient, and the interfacial distribution coefficient, are entered, and the above-mentioned information is saved in a preset database.

[0063] Table 1: Database of characteristic parameters of display materials releasing different pollutants

[0064]

[0065] For the database of characteristic parameters of display materials releasing different pollutants, it can be used for a user to query the characteristic parameters of any display material corresponding to any pollutant. In a database-based query embodiment, first, selection information is obtained, which is used to indicate the display material, the pollutant, and the characteristic parameter to be queried; then, according to the selection information, the parameter data in the database is queried. For example, the name of the display material to be queried is input or selected from the list of display materials, the plurality of pollutants corresponding to the display material to be queried are obtained, the pollutant to be queried is selected from the plurality of pollutants, the characteristic parameter corresponding to the pollutant to be queried is obtained, and at least one of the three characteristic parameters can be selected as the parameter to be queried; after the above selection of the display material, the pollutant, and the characteristic parameter, the complete selection information of the user is determined, and the database is queried according to the selection information to obtain specific parameter data. Thus, the query is completed.

[0066] Step S103: obtaining, from the database, the first characteristic parameters of the target pollutants released by the target display materials of a plurality of types in the display space.

[0067] Step S104: dividing each target display material into a plurality of microelement nodes.

[0068] Step S105: predicting, by a first concentration simulation model, the change in the predicted concentration of the target pollutants released by each microelement node in the display space with the change in the emission time according to the first characteristic parameters; wherein the predicted concentration is used to evaluate the safety of the environment in the display space.

[0069] In a specific implementation, the change in the predicted concentration of the target pollutants released by each microelement node in the display space with the change in the emission time can be predicted by a first concentration simulation model according to the first characteristic parameters and a preset matrix control equation.

[0070] The matrix control equation includes:

[0071]

[0072] where B is a matrix, representing the volume of each micro-element node, C(t) is a vector, representing the predicted concentration of target pollutant released by each micro-element node at emission time t, and A is a matrix, representing the concentration correlation between each micro-element node.

[0073] For ease of understanding, the above matrix control equation (6) is described in detail.

[0074] When multiple display materials are released together, the pollutant concentration change over time pollutant emission model can be referred to as shown in Figure 3 The initial conditions of the pollutant emission model are:

[0075] t = 0, C i (x, t = 0) = C 0,i , y(t = 0) = 0

[0076] That is, at the beginning, it is considered that the pollutants in the display materials are uniformly distributed, and the indoor air is clean and does not contain pollutants.

[0077] Under the influence of the emission of multiple display materials (such as material 1, material 2, …, material i, …, material N) in the room, the pollutant concentration in the air satisfies the following equation (7)

[0078]

[0079] Where y(t) represents the pollutant concentration value in the air at time t, V is the air volume, Q is the room ventilation rate, C i is the pollutant concentration in the display material i, A i , h mi , K i , L i are the use area, surface convective mass transfer coefficient, air-material distribution coefficient, and thickness of the display material i, respectively.

[0080] In the display material i, the diffusion process of the pollutant satisfies the Fick's diffusion law:

[0081]

[0082] Where C i (x, t) is the concentration value at position x in the display material i at time t, and D i is the diffusion coefficient of the pollutant in the display material i.

[0083] For the display material i, the upper and lower boundary conditions are:

[0084] The lower boundary condition: the lower surface of the display material i is an impermeable surface and does not occur mass transfer, satisfying the following formula (9):

[0085]

[0086] Upper boundary condition: the upper surface of the exhibition material i, which is in contact with the indoor air, the pollutants emitted from the upper surface of the exhibition material enter the air boundary layer and further mass transfer to the main body of the indoor air, satisfying the following formula (10):

[0087]

[0088] For the case of N=2 or more than 2 kinds of exhibition materials, there is no analytical solution for the indoor pollutant concentration y(t), so this embodiment uses numerical calculation method to solve by difference method, as shown below.

[0089] Discretization of the control equation. This embodiment applies the difference method to analyze the calculation model, which should be divided into multiple microelements by dividing the analysis object into multiple microelements, so that the object with uneven concentration in space (such as each target exhibition material) is divided into multiple microelements, each of which is spatially uniform, thereby simplifying the calculation process inside each microelement, converting differential calculation to algebraic calculation, and converting the partial differential solution process to a large-scale matrix operation process.

[0090] Inside the exhibition material, the pollutant diffuses in one dimension along the thickness direction, so the pollutant concentration is uneven inside the exhibition material, and then it is divided into multiple microelements along the thickness direction. The exhibition material is divided into multiple microelement nodes (microelement node 1, microelement node 2, …, microelement node j, …, microelement node n i ) with a thickness of δ for each microelement, and each target exhibition material can be divided into n i = L i / δ microelement nodes.

[0091] Correspondingly, for any microelement node j inside, the control equation in the target exhibition material i is rewritten as:

[0092]

[0093] The upper and lower surface boundary conditions of the target exhibition material i are rewritten as:

[0094] At the lower surface of the target exhibition material (j=1), there is:

[0095]

[0096] For the indoor air, because it is assumed to be fully mixed in the model, the concentration is uniformly distributed, so it can be regarded as a calculation microelement.

[0097] For the air node, its control equation can be referred to as formula (13):

[0098]

[0099] The characteristics of the explicit difference method. In this embodiment, taking the control equation in the exhibition material as an example, in the discretized control equation (11), the differential of the pollutant concentration with respect to time is discretized in time (with Δt as the discretization unit). The time discretization of the explicit difference is as follows:

[0100]

[0101] That is:

[0102]

[0103] The left side of the equation (15) is the concentration of the microelement node j in the target exhibition material i at the next time, which is an unknown quantity; the right side of the equation (15) is the concentration of the microelement nodes j-1, j, j+1 in the target exhibition material i at the last time, which is a known quantity. When calculating the concentration of each microelement at the next time, only the concentration of each adjacent microelement node at the last time is needed to be used to perform algebraic calculation on each microelement node at the next time, and the concentration of each microelement node can be calculated one by one.

[0104] The explicit difference method provided in this embodiment has the characteristics of simple algorithm and small calculation amount.

[0105] The characteristics of the implicit difference method. In this embodiment, the time discretization of the implicit difference can refer to the following formula (16):

[0106]

[0107] That is:

[0108]

[0109] In formula (17), the concentration of the microelement node j in the target exhibition material i is determined by the concentrations of the adjacent two microelement nodes at this time and the concentration of the microelement node at the last time, so the concentration distribution must be calculated by solving the algebraic equation set.

[0110] The control equations of the above microelement nodes and air nodes in the target exhibition material are combined to be rewritten in the following matrix form:

[0111]

[0112] Wherein, B is a matrix, representing the volume of the microelement node; is a vector, representing the concentration of each microelement node changing with time; A is a matrix, representing the concentration correlation between each microelement node; C is a vector, representing the concentration of each microelement node.

[0113] The matrix control equation (18) is discretized in time using the implicit difference method, which can be written as (19) and (20) as follows:

[0114]

[0115]

[0116] The above linear algebraic equations are calculated by using a computer program, and the concentration-time curve of the pollutant in the air can be obtained.

[0117] The implicit difference method provided in the embodiment is generally unconditionally stable, which is its greatest advantage, so it can be calculated at any time.

[0118] In the above embodiment, in the application of the implicit difference method, the construction of matrix B and matrix A needs to be performed according to the problem to be calculated. If the number of all microelement nodes in the system is M, the size of matrix B and matrix A is MxM. Since the size is related to the number of microelement nodes, when the system size changes or the space differential length δ changes, matrix B and matrix A need to be specified again, which is not suitable for the demand of being able to simulate different scenarios to be achieved by the present solution.

[0119] Therefore, the embodiment adopts object-oriented programming, automatically specifies the adjacent relationship by self-division of the microelement, and realizes automatic generation of matrix B and matrix A by binding the size information of each microelement to the microelement itself. Thus, the self-generating implicit difference calculation which is automatic and can adapt to various simulation scenarios is realized.

[0120] According to the above embodiment, the characteristic parameters of the display material such as the initial dispersible concentration C0, the diffusion coefficient D and the interface distribution coefficient K are applied for simulation calculation, which is closer to the real situation; the implicit difference method is applied for calculation, which can adapt to various simulation calculation scales and various simulation time requirements; the self-generation of the operation matrix in the implicit difference method is realized, so that the program is simple and easy to use, and the user does not need to perform complex mathematical calculations.

[0121] The above matrix control equation can be used to predict the change of the predicted concentration of at least one target pollutant released by each microelement node in the display space with the change of the release time, and the change of the predicted concentration can be displayed in the form of a curve.

[0122] The above embodiment provides a method for predicting the pollutant concentration and evaluating the environmental safety of a plurality of display materials. Accordingly, the present embodiment can also provide a method for predicting the pollutant concentration and evaluating the environmental safety of a single type of display material, as shown below.

[0123] In the embodiment, the second concentration simulation model can correspond to a single type of exhibition material. Accordingly, the embodiment can include: obtaining, from a database, a second characteristic parameter of a target pollutant released by a target exhibition material of a single type in an exhibition space; and predicting, by the second concentration simulation model, a predicted concentration of the target pollutant released by the target exhibition material of the single type in the exhibition space at a target emission time according to the second characteristic parameter and a preset concentration change algorithm.

[0124] The concentration change algorithm includes:

[0125]

[0126] wherein y(t) represents the predicted concentration of the at least one target pollutant in the exhibition space at the target emission time t, C0 represents an initial releasable concentration of the target pollutant, t represents the emission time, D represents a diffusion coefficient of the target pollutant, L represents a thickness of the target exhibition material, and β represents a ratio between a volume of the exhibition material and a volume of a test chamber.

[0127] β = AL / V; A represents a surface area of the target exhibition material, and V represents a volume of the test chamber, which is also the exhibition space.

[0128]

[0129] wherein Bi m = h m L / D, h m represents a convective mass transfer coefficient; and q n is each positive root of the equation .

[0130] C0 and K in the above formula are the second characteristic parameters obtained from the database.

[0131] In the above embodiment, based on basic theories such as heat and mass transfer, fluid mechanics, and environmental chemistry, combined with museum building environment information, physical parameters of exhibition materials, and the like, a pollutant emission and transmission model (referred to as a concentration simulation model) of museum exhibition materials is established, so as to realize simulation and prediction of the change rule of pollutant concentration in the exhibition space environment of the museum over time.

[0132] In the embodiment, the method for predicting the pollutant concentration in the above embodiment can be applied to actual museum exhibition material environmental safety evaluation. Referring to Figure 4 , the embodiment can include:

[0133] (1) Obtain current space parameters of the exhibition space to be evaluated, current material information of the exhibition material to be evaluated, and types of the pollutants to be evaluated. The current space parameters can include area, height, air exchange rate, temperature, and humidity of the exhibition space to be evaluated, and the temperature and humidity can be considered as constant values. The current material information can include types and amount of the exhibition material to be evaluated, and the amount can be determined by area and thickness. The types of the pollutants to be evaluated can be at least one of formaldehyde, TVOC, formic acid, and acetic acid.

[0134] (2) Simulate and predict the current space parameters, the current material information, and the types of the pollutants to be evaluated according to a concentration simulation model to obtain pollutant concentration output information. The concentration simulation model can be a first concentration simulation model for multiple exhibition materials, or a second concentration simulation model for a single type of exhibition material. The pollutant concentration output information corresponding to each type of pollutant to be evaluated can include multiple contents, such as a concentration prediction curve changing with time, a concentration prediction instantaneous value, a concentration average value, and a pollution contribution of each exhibition material.

[0135] (3) Determine whether the pollutant concentration output information is within a preset safety range. For the pollutant concentration output information, comprehensive determination can be performed, that is, whether the multiple pollutant concentration output information is within the respective safety ranges; or targeted determination can also be performed, that is, whether one or several of the pollutant concentration output information is within the corresponding safety range.

[0136] (4) In the case that the determination is no, that is, the pollutant concentration output information is not within the safety range, adjust the current space parameters and the current material information to obtain new current space parameters and new current material information. In the case that the pollutant concentration output information is not within the safety range, the exhibition space to be evaluated and the exhibition material to be evaluated can be optimized by adjusting the current space parameters and the current material information. Specifically, adjusting the current space parameters includes adjusting the air exchange rate of the exhibition space to be evaluated; and adjusting the current material information includes adjusting the material amount and the material quality of the exhibition material to be evaluated. The material amount and the material quality can be adjusted to change the characteristic parameters.

[0137] Return to step (2) above by using the new current space parameters and the new current material information after adjustment. Repeat the above steps until the pollutant concentration output information is within the preset safety range.

[0138] The embodiment combines the museum building environment information and the exhibition material characteristic parameters, simulates and predicts the variation law of the pollutant concentration in the museum exhibition space environment, and realizes the environmental safety evaluation of the exhibition material. From the perspective of predicting the pollutant concentration emitted by the exhibition material, the environmental safety of the exhibition material is evaluated, the prior control of the type and amount of the exhibition material is realized, and the pollutant concentration exceeding the standard is prevented from the source. The vicious cycle of the prior art, that is, "exhibiting first, detecting second and treating third", is avoided, and a new mode of "pollution prediction, exhibition material optimization and exhibition construction" can be formed by using the embodiment.

[0139] In summary, the environmental safety evaluation method provided by the embodiment of the present disclosure can provide convenience for users to query the characteristic parameters based on the established database of the characteristic parameters of the exhibition materials releasing different pollutants, and improve the parameter query efficiency. The pollutant concentration is predicted according to the database and the concentration simulation model, and the prediction concentration with high accuracy can be obtained, and then the environmental safety is evaluated by using the prediction concentration, which can not only improve the accuracy of the safety evaluation result, but also better solve the defects existing in the prior art, realize the prior control of the type and amount of the exhibition material, prevent the pollutant concentration from exceeding the standard from the source, and realize the accurate evaluation of the environmental safety of the museum exhibition material.

[0140] Figure 5 The environmental safety evaluation device provided by the embodiment of the present disclosure is used to realize the environmental safety evaluation method. Referring to Figure 5 , the device comprises:

[0141] The parameter determination module 401 is configured to determine the characteristic parameters of the exhibition material releasing a plurality of pollutants, and the characteristic parameters include: initial releasable concentration, diffusion coefficient and interface distribution coefficient.

[0142] The database establishment module 402 is configured to establish a database according to the exhibition material, a plurality of pollutants corresponding to the exhibition material and the characteristic parameters corresponding to each pollutant.

[0143] The parameter acquisition module 403 is configured to acquire the first characteristic parameters of the target pollutants released by the target exhibition materials of a plurality of types in the exhibition space from the database.

[0144] The node division module 404 is configured to divide each target exhibition material into a plurality of micro-element nodes.

[0145] The concentration prediction module 405 is configured to predict the change of the prediction concentration of the target pollutants released by each micro-element node in the exhibition space according to the first characteristic parameters by using a first concentration simulation model, and the prediction concentration is used to evaluate the safety of the environment in the exhibition space.

[0146] The device provided by the embodiment has the same implementation principle and released technical effects as the foregoing method embodiments. For brief description, the device embodiment part is not mentioned in the foregoing method embodiments. Please refer to the corresponding content in the foregoing method embodiments.

[0147] Figure 6 A structural schematic diagram of an electronic device is provided in the embodiment of the present disclosure. As shown in the figure, Figure 6 The electronic device 500 includes one or more processors 501 and a memory 502.

[0148] The processor 501 can be a central processing unit (CPU) or other forms of processing units having data processing and / or instruction execution capabilities, and can control other components in the electronic device 500 to perform desired functions.

[0149] The memory 502 can include one or more computer program products, which can include various forms of computer readable storage media, such as volatile memory and / or non-volatile memory. The volatile memory may, for example, include random access memory (RAM), cache memory, and the like. The non-volatile memory may, for example, include read-only memory (ROM), hard disk, flash memory, and the like. One or more computer program instructions can be stored on the computer readable storage medium, and the processor 501 can run the program instructions to implement the environment safety evaluation method of the embodiment of the present disclosure described above and / or other desired functions. Various contents such as input signals, signal components, noise components, and the like can also be stored in the computer readable storage medium.

[0150] In one example, the electronic device 500 can further include an input device 503 and an output device 504, which are interconnected through a bus system and / or other forms of connection mechanism (not shown).

[0151] In addition, the input device 503 can also include, for example, a keyboard, a mouse, and the like.

[0152] The output device 504 can output various information to the outside, including the determined distance information, direction information, and the like. The output device 504 can include, for example, a display, a speaker, a printer, a communication network and a remote output device connected thereto, and the like.

[0153] Of course, in order to simplify, Figure 6 In the embodiment, only some of the components related to the present disclosure in the electronic device 500 are shown, and components such as buses, input / output interfaces, and the like are omitted. In addition, according to specific application conditions, the electronic device 500 can also include any other appropriate components.

[0154] Further, the embodiment also provides a computer readable storage medium, which stores a computer program, and the computer program is used for executing the environment security assessment method.

[0155] The computer program product of the environment security assessment method, device, electronic device and medium provided by the embodiment of the present disclosure includes a computer readable storage medium storing program codes, the instructions included in the program codes are used for executing the method described in the foregoing method embodiment, and the specific implementation can be referred to the method embodiment, and will not be described here.

[0156] It should be noted that, in this document, relational terms such as“first” and“second”, and the like, are used solely to distinguish one entity or action from another entity or action, without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms“comprises”,“comprising”, or any other variations 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 can include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without more limitations, an element defined by the statement“comprising a……” does not exclude the existence of additional identical elements in the process, method, article, or apparatus that comprises the stated element.

[0157] The above description is merely one specific implementation of the present disclosure, which enables those skilled in the art to understand or implement the present disclosure. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present disclosure. Therefore, the present disclosure will not be limited to these embodiments described herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An environmental safety assessment method, characterized in that, include: The characteristic parameters of various pollutants released by the exhibition materials were determined, including: initial volatile concentration, diffusion coefficient, and interfacial partition coefficient. A database is established based on the exhibition materials, the various pollutants corresponding to the exhibition materials, and the characteristic parameters corresponding to each pollutant. Obtain the first characteristic parameters of the target pollutants released by various types of target exhibition materials in the exhibition space from the database; Each of the target display materials is divided into multiple micro-element nodes; The first concentration simulation model predicts the change in the predicted concentration of the target pollutant released by each micro-node in the exhibition space as the emission time changes, based on the first characteristic parameter; wherein the predicted concentration is used to assess the safety of the environment in the exhibition space.

2. The method according to claim 1, characterized in that, The determination of the characteristic parameters of the exhibition materials releasing various pollutants includes: Under the preset experimental conditions, the C-history method was used to detect the equilibrium concentration and dynamic concentration of various pollutants released by the display materials in the test chamber. Based on the equilibrium concentration and the dynamic concentration, the characteristic parameters corresponding to each pollutant are calculated.

3. The method according to claim 1, characterized in that, The step of predicting the change in the concentration of the target pollutant released by each micro-node in the exhibition space as a function of the first characteristic parameter using a first concentration simulation model includes: The first concentration simulation model predicts the change in the predicted concentration of the target pollutants released by each micro-node in the exhibition space as the emission time changes, based on the first characteristic parameters and the preset matrix control equation. The matrix governing equations include: Wherein, B is a matrix representing the volume of each of the micro-nodes, C(t) is a vector representing the predicted concentration of the target pollutant released by each of the micro-nodes at emission time t, and A is a matrix representing the concentration correlation between the micro-nodes.

4. The method according to claim 1, characterized in that, The method further includes: Obtain selection information, which represents the exhibition materials, pollutants, and characteristic parameters to be queried; Based on the selection information, the parameter data is queried in the database.

5. The method according to claim 1, characterized in that, The method further includes: Obtain second characteristic parameters of target pollutants released by a single type of target exhibition material within the exhibition space from the database; The second concentration simulation model, based on the second characteristic parameters and a preset concentration change algorithm, predicts the concentration of the target pollutant released by a single type of target display material in the display space within the target emission time. The concentration change algorithm includes: Where y(t) represents the predicted concentration, C0 represents the initial emissible concentration of the target pollutant, t represents the emissivity time, D represents the diffusion coefficient of the target pollutant, L represents the thickness of the target display material, and β represents the ratio between the volume of the target display material and the volume of the test chamber. β = AL / D; A represents the surface area of ​​the display material, and V represents the volume of the test chamber; Among them, Bi m =h m L / D, h m q represents the convective mass transfer coefficient; n For the equation The various positive roots.

6. The method according to claim 1, characterized in that, The method further includes: Obtain the current spatial parameters of the exhibition space to be evaluated, the current material information of the exhibition materials to be evaluated, and the types of pollutants to be evaluated; Based on the preset concentration simulation model, the current spatial parameters, the current material information, and the types of pollutants to be evaluated are simulated and predicted to obtain pollutant concentration output information; Determine whether the pollutant concentration output information is within a preset safety range; If not, adjust the current spatial parameters and the current material information to obtain new current spatial parameters and new current material information; Repeat the above steps until the pollutant concentration output information is within the preset safety range.

7. The method according to claim 6, characterized in that, The adjustment of the current space parameters includes: adjusting the air exchange rate of the exhibition space to be evaluated; The adjustment of current material information includes: adjusting the material usage and material quality of the exhibition materials to be evaluated.

8. An environmental safety assessment device, characterized in that, include: The parameter measurement module is used to measure the characteristic parameters of various pollutants released by the exhibition materials, including: initial volatile concentration, diffusion coefficient and interfacial partition coefficient. The database establishment module is used to establish a database based on the exhibition materials, various pollutants corresponding to the exhibition materials, and characteristic parameters corresponding to each pollutant; The parameter acquisition module is used to acquire the first characteristic parameters of target pollutants released by various types of target exhibition materials in the exhibition space from the database. The node partitioning module is used to divide each type of target display material into multiple micro-element nodes; The concentration prediction module is used to predict the change in the predicted concentration of the target pollutant released by each micro-node in the exhibition space as the emission time changes, based on the first characteristic parameter and using a first concentration simulation model; wherein the predicted concentration is used to assess the safety of the environment in the exhibition space.

9. An electronic device, characterized in that, The electronic device includes: processor; Memory used to store the processor's executable instructions; The processor is configured to read the executable instructions from the memory and execute the instructions to implement the method described in any one of claims 1-7.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores instructions that, when executed on a terminal device, cause the terminal device to perform the method as described in any one of claims 1-7.

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