CN110836954B - Toxic gas leakage hazard prediction system and method based on PLC control - Google Patents
Toxic gas leakage hazard prediction system and method based on PLC control Download PDFInfo
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- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0062—General constructional details of gas analysers, e.g. portable test equipment concerning the measuring method, e.g. intermittent, or the display, e.g. digital
- G01N33/0067—General constructional details of gas analysers, e.g. portable test equipment concerning the measuring method, e.g. intermittent, or the display, e.g. digital by measuring the rate of variation of the concentration
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Abstract
The invention discloses a toxic gas leakage hazard prediction system and method based on PLC control, wherein the prediction system comprises a gas concentration acquisition module, an atmospheric stability acquisition module and a prediction model evaluation module, the gas concentration acquisition module and the atmospheric stability acquisition module are both connected with the prediction model evaluation module, the gas concentration acquisition module is used for acquiring a gas concentration parameter, the atmospheric stability acquisition module is used for module atmospheric stability parameter, the prediction model evaluation module carries out prediction evaluation on toxic gas leakage hazard according to the gas concentration parameter and the atmospheric stability parameter, the gas concentration acquisition module comprises a main acquisition point generation module, a first auxiliary acquisition point generation module, a second auxiliary acquisition point generation module, a timing module, a gas concentration acquisition module, a concentration average value comparison module, a gas concentration first parameter output module, a gas concentration parameter output module and a gas concentration parameter output module, A concentration change value calculating module and a concentration change value comparing module.
Description
Technical Field
The invention relates to the field of PLC (programmable logic controller) control, in particular to a toxic gas leakage hazard prediction system and method based on PLC control.
Background
At present, chemical industry of all countries in the world is rapidly developed, the flourishing of the chemical industry is helpful for promoting the development of economy, but chemical accidents such as explosion, fire, poisoning and the like are frequently generated. Toxic gas leakage is one of the most common accidents in chemical industry, and if the toxic gas leakage is remedied, the toxic gas leakage often damages the health of people. In the prior art, the method is lack of toxic gas leakage hazard prediction, and accidents cannot be controlled timely and effectively.
Disclosure of Invention
The invention aims to provide a toxic gas leakage hazard prediction system and method based on PLC control, and aims to solve the problems in the prior art.
In order to achieve the purpose, the invention provides the following technical scheme:
the toxic gas leakage hazard prediction system based on PLC control comprises a gas concentration acquisition module, an atmospheric stability acquisition module and a prediction model evaluation module, wherein the gas concentration acquisition module and the atmospheric stability acquisition module are connected with the prediction model evaluation module, the gas concentration acquisition module is used for acquiring gas concentration parameters, the atmospheric stability acquisition module is used for module atmospheric stability parameters, and the prediction model evaluation module carries out prediction evaluation on toxic gas leakage hazard according to the gas concentration parameters and the atmospheric stability parameters.
Preferably, the gas concentration acquisition module comprises a main acquisition point generation module, a first auxiliary acquisition point generation module, a second auxiliary acquisition point generation module, a timing module, a gas concentration acquisition module, a concentration average value comparison module, a gas concentration first parameter output module, a concentration change value calculation module, a concentration change value comparison module and a gas concentration second parameter output module, wherein the main acquisition point generation module, the first auxiliary acquisition point generation module and the second auxiliary acquisition point generation module are used for generating positions of a main gas acquisition point, a first gas auxiliary acquisition point and a second gas auxiliary acquisition point in a gas acquisition field area, the timing module is used for timing in the gas concentration acquisition process, and the gas concentration acquisition module is used for acquiring gas concentrations at the main gas acquisition point, the first gas auxiliary acquisition point and the second gas auxiliary acquisition point, the concentration average value comparison module is used for comparing the gas concentrations at the main gas acquisition point, the first auxiliary gas acquisition point and the second auxiliary gas acquisition point with a preset concentration average value, the first parameter output module outputs the value of the first parameter of the gas concentration according to the comparison result of the concentration average value comparison module, the concentration change value calculation module is used for calculating the gas concentration change values in unit time at a main gas collection point, a first auxiliary gas collection point and a second auxiliary gas collection point, the concentration change value comparison module is used for comparing gas concentration change values at the main gas collection point, the first auxiliary gas collection point and the second auxiliary gas collection point with preset gas concentration changes, and the gas concentration second parameter output module outputs a value of a second gas concentration parameter according to a comparison result of the concentration change value comparison module.
Preferably, the atmospheric stability acquiring module comprises an atmospheric stability acquiring module and a stability parameter output module, the atmospheric stability acquiring module is used for acquiring local atmospheric stability of the gas acquisition field from a meteorological report, the stability parameter output module is used for outputting an atmospheric stability parameter according to the acquired atmospheric stability, the prediction model evaluating module comprises a prediction model calculating module and a prediction result output module, the prediction model calculating module calculates a result of the prediction model according to the gas concentration first parameter, the gas concentration first parameter and the atmospheric stability parameter, and the prediction result output module outputs the toxic gas leakage hazard prediction result as safety or danger according to a calculation result of the prediction model calculating module.
A toxic gas leakage hazard prediction method based on PLC control comprises the following steps:
step S1: the PLC controls the collection of the gas concentration and obtains a gas concentration parameter;
step S2: collecting atmospheric stability and obtaining atmospheric stability parameters;
step S3: and establishing a toxic gas leakage hazard prediction model, and outputting a prediction result according to the model.
Preferably, the step S1 further includes the following steps:
step S11: selecting one point as a main gas acquisition point in a gas acquisition field area, setting the position of the main gas acquisition point, which is vertically upward and is r away from the main gas acquisition point, as a first auxiliary acquisition point, setting the position of the main gas acquisition point, which is vertically downward and is r away from a horizontal acquisition point, as a second auxiliary acquisition point, and setting two auxiliary acquisition points to increase the accuracy of toxic gas leakage hazard prediction;
step S12: in a first acquisition time period T1, acquiring the average value of the gas concentration at the main acquisition point of the gas as j1, the average value of the gas concentration at the first auxiliary acquisition point as k1 and the average value of the gas concentration at the gas at the second auxiliary acquisition point as l 1;
step S13: judging whether the gas concentration average value j1, the gas concentration average value k1 and the gas concentration average value l1 collected in the step S12 exceed a preset concentration average value n,
if two or more than two gas concentration average values in the gas concentration average value j1, the gas concentration average value k1 and the gas concentration average value l1 are greater than or equal to the preset concentration value n, turning to step S14 when the first gas concentration parameter f1 is equal to 1, or turning to step S14 when the first gas concentration parameter f1 is equal to 0;
step S14: after the interval time period T, in a second acquisition time period T2, acquiring that the average value of the gas concentration at the main acquisition point is j2, the average value of the gas concentration at the first auxiliary acquisition point is k2, and the average value of the gas concentration at the second auxiliary acquisition point is l2, and turning to step S15;
step S15: respectively calculating a gas concentration change value a1 ═ j2-j1)/[ (T1+ T2)/2+ T ] in unit time at the gas main acquisition point, a gas concentration change value a2 ═ k2-k1)/[ (T1+ T2)/2+ T ] in unit time at the first auxiliary acquisition point, a gas concentration change value a3 ═ l2-l1)/[ (T1+ T2)/2+ T ] in unit time at the second auxiliary acquisition point, and turning to step S16;
step S16: it is judged whether or not the gas concentration variation values a1, a2, a3 calculated in step S15 exceed the preset gas concentration variation value m,
if the gas concentration variation values a1, a2 and a3 contain two or more average gas concentration values greater than or equal to the preset gas concentration variation value m, the second gas concentration parameter f2 is equal to 1, otherwise the second gas concentration parameter f2 is equal to 0
Preferably, the step S2 further includes the following steps:
obtaining the atmospheric stability of the collection time period of the gas collection field, classifying the atmospheric stability by a PassQuel method,
when the atmospheric stability is strong or unstable, the atmospheric stability parameter f3 is 0, otherwise f3 is 1, and when the atmospheric stability is higher, the gas is less likely to diffuse, and the risk of toxic gas leakage is higher.
Preferably, the toxic gas leakage hazard prediction model Y in step S3 is c1f1+ c2f2+ c3f3, and Y has a value of [0, 1], where c1 is a weight of f1, c2 is a weight of f2, and c3 is a weight of f 3.
Preferably, the prediction result in step S3 includes:
when 0< Y <0.4, the prediction result is output as safe;
when 0.4< ═ Y < ═ 1, the prediction result is output as a risk.
Compared with the prior art, the invention has the beneficial effects that: according to the method, the first parameter of the gas concentration and the atmospheric stability are obtained by collecting the collected gas concentration and the atmospheric stability, the toxic gas leakage hazard prediction model is calculated according to the first parameter of the gas concentration, and the leakage condition is predicted according to the calculation result, so that the toxic gas leakage accident is effectively controlled in the shortest time, and the personnel damage is reduced.
Drawings
FIG. 1 is a schematic block diagram of a toxic gas leakage hazard prediction method based on PLC control according to the present invention;
fig. 2 is a schematic flowchart of step S1 of the toxic gas leakage hazard prediction method based on PLC control according to the present invention.
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.
Referring to fig. 1-2, in an embodiment of the present invention, a toxic gas leakage hazard prediction system based on PLC control includes a gas concentration obtaining module, an atmospheric stability obtaining module, and a prediction model evaluation module, where the gas concentration obtaining module and the atmospheric stability obtaining module are both connected to the prediction model evaluation module, the gas concentration obtaining module is configured to obtain a gas concentration parameter, the atmospheric stability obtaining module is configured to obtain an atmospheric stability parameter, and the prediction model evaluation module performs prediction evaluation on a toxic gas leakage hazard according to the gas concentration parameter and the atmospheric stability parameter.
The gas concentration acquisition module comprises a main acquisition point generation module, a first auxiliary acquisition point generation module, a second auxiliary acquisition point generation module, a timing module, a gas concentration acquisition module, a concentration average value comparison module, a gas concentration first parameter output module, a concentration change value calculation module, a concentration change value comparison module and a gas concentration second parameter output module, wherein the main acquisition point generation module, the first auxiliary acquisition point generation module and the second auxiliary acquisition point generation module are used for generating positions of a main gas acquisition point, a first gas auxiliary acquisition point and a second gas auxiliary acquisition point in a gas acquisition field area, the timing module is used for timing in the gas concentration acquisition process, and the gas concentration acquisition module is used for acquiring gas concentrations at the main gas acquisition point, the first gas auxiliary acquisition point and the second gas auxiliary acquisition point, the concentration average value comparison module is used for comparing the gas concentrations at the main gas collection point, the first auxiliary gas collection point and the second auxiliary gas collection point with a preset concentration average value, the first parameter output module outputs a value of a first parameter of the gas concentration according to a comparison result of the concentration average value comparison module, the concentration change value calculation module is used for calculating the gas concentration change values in unit time at a main gas collection point, a first auxiliary gas collection point and a second auxiliary gas collection point, the concentration change value comparison module is used for comparing gas concentration change values at the main gas acquisition point, the first auxiliary gas acquisition point and the second auxiliary gas acquisition point with preset gas concentration changes, and the gas concentration second parameter output module outputs a value of a second gas concentration parameter according to a comparison result of the concentration change value comparison module.
The atmospheric stability acquiring module comprises an atmospheric stability acquiring module and a stability parameter output module, the atmospheric stability acquiring module is used for acquiring local atmospheric stability of a gas acquisition field from a meteorological report, the stability parameter output module is used for outputting atmospheric stability parameters according to the acquired atmospheric stability, the prediction model evaluating module comprises a prediction model calculating module and a prediction result output module, the prediction model calculating module calculates results of the prediction model according to the first gas concentration parameter, the first gas concentration parameter and the atmospheric stability parameters, and the prediction result output module outputs a toxic gas leakage hazard prediction result as safe or dangerous according to the calculation result of the prediction model calculating module.
A toxic gas leakage hazard prediction method based on PLC control comprises the following steps:
step S1: the PLC controls the collection of gas concentration and obtains gas concentration parameters:
step S11: selecting one point as a main gas acquisition point in a gas acquisition field area, setting the position of the main gas acquisition point, which is vertically upward and is r away from the main gas acquisition point, as a first auxiliary acquisition point, setting the position of the main gas acquisition point, which is vertically downward and is r away from a horizontal acquisition point, as a second auxiliary acquisition point,
step S12: in a first acquisition time period T1, acquiring the average value of the gas concentration at the main acquisition point of the gas as j1, the average value of the gas concentration at the first auxiliary acquisition point as k1 and the average value of the gas concentration at the gas at the second auxiliary acquisition point as l 1;
step S13: judging whether the gas concentration average value j1, the gas concentration average value k1 and the gas concentration average value l1 collected in the step S12 exceed a preset concentration average value n,
if two or more than two gas concentration average values in the gas concentration average value j1, the gas concentration average value k1 and the gas concentration average value l1 are greater than or equal to the preset concentration value n, turning to step S14 when the first gas concentration parameter f1 is equal to 1, or turning to step S14 when the first gas concentration parameter f1 is equal to 0;
step S14: after the interval time period T, in a second acquisition time period T2, acquiring that the average value of the gas concentration at the main acquisition point is j2, the average value of the gas concentration at the first auxiliary acquisition point is k2, and the average value of the gas concentration at the second auxiliary acquisition point is l2, and turning to step S15;
step S15: respectively calculating a gas concentration change value a1 ═ j2-j1)/[ (T1+ T2)/2+ T ] in unit time at the gas main acquisition point, a gas concentration change value a2 ═ k2-k1)/[ (T1+ T2)/2+ T ] in unit time at the first auxiliary acquisition point, a gas concentration change value a3 ═ l2-l1)/[ (T1+ T2)/2+ T ] in unit time at the second auxiliary acquisition point, and turning to step S16;
step S16: it is judged whether or not the gas concentration variation values a1, a2, a3 calculated in step S15 exceed the preset gas concentration variation value m,
if two or more average gas concentration values in the gas concentration change values a1, a2 and a3 are greater than or equal to the preset gas concentration change value m, the second gas concentration parameter f2 is 1, otherwise the second gas concentration parameter f2 is 0;
step S2: collecting the atmospheric stability, and acquiring atmospheric stability parameters:
obtaining the atmospheric stability of the collection time period of the gas collection field, classifying the atmospheric stability by a PassQuel method,
when the atmospheric stability is strong stability or unstable, the atmospheric stability parameter f3 is 0, otherwise f3 is 1.
Step S3: establishing a toxic gas leakage hazard prediction model, and outputting a prediction result according to the model:
the toxic gas leakage hazard prediction model Y is 0.4f1+0.3f2+0.3f3, the value of Y is [0, 1],
the predicted results include:
when 0< Y <0.4, the prediction result is output as safe;
when 0.4< ═ Y < ═ 1, the prediction result is output as a risk.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (3)
1. A toxic gas leakage hazard prediction method based on PLC control is characterized by comprising the following steps: the prediction method comprises the following steps:
step S1: the PLC controls the collection of the gas concentration and obtains a gas concentration parameter;
step S2: collecting atmospheric stability and obtaining atmospheric stability parameters;
step S3: establishing a toxic gas leakage hazard prediction model, and outputting a prediction result according to the model;
the step S1 further includes the steps of:
step S11: selecting one point as a main gas acquisition point in a gas acquisition field area, setting the position of the main gas acquisition point, which is vertically upward and is r away from the main gas acquisition point, as a first auxiliary acquisition point, setting the position of the main gas acquisition point, which is vertically downward and is r away from a horizontal acquisition point, as a second auxiliary acquisition point,
step S12: in a first acquisition time period T1, acquiring the average value of the gas concentration at the main acquisition point of the gas as j1, the average value of the gas concentration at the first auxiliary acquisition point as k1 and the average value of the gas concentration at the gas at the second auxiliary acquisition point as l 1;
step S13: judging whether the gas concentration average value j1, the gas concentration average value k1 and the gas concentration average value l1 collected in the step S12 exceed a preset concentration average value n,
if the average gas concentration values j1, k1 and l1 contain two or more average gas concentration values greater than or equal to the preset concentration value n, turning to step S14 when the first gas concentration parameter f1 is equal to 1, otherwise, turning to step S14 when the first gas concentration parameter f1 is equal to 0;
step S14: after the interval time period T, in a second acquisition time period T2, acquiring that the average value of the gas concentration at the main acquisition point is j2, the average value of the gas concentration at the first auxiliary acquisition point is k2, and the average value of the gas concentration at the second auxiliary acquisition point is l2, and turning to step S15;
step S15: respectively calculating a gas concentration change value a1 ═ j2-j1)/[ (T1+ T2)/2+ T ] in unit time at the main gas acquisition point, a gas concentration change value a2 ═ k2-k1)/[ (T1+ T2)/2+ T ] in unit time at the first auxiliary acquisition point, a gas concentration change value a3 ═ l2-l1)/[ (T1+ T2)/2+ T ] in unit time at the second auxiliary acquisition point, and turning to step S16;
step S16: it is judged whether or not the gas concentration variation values a1, a2, a3 calculated in step S15 exceed the preset gas concentration variation value m,
if two or more average gas concentration values in the gas concentration change values a1, a2 and a3 are greater than or equal to the preset gas concentration change value m, the second gas concentration parameter f2 is 1, otherwise the second gas concentration parameter f2 is 0;
the step S2 further includes the following:
obtaining the atmospheric stability of the collection time period of the gas collection field, classifying the atmospheric stability by a PassQuel method,
when the atmospheric stability is strong stability or unstable, the atmospheric stability parameter f3 is 0, otherwise f3 is 1;
the toxic gas leakage hazard prediction model in the step S3 is c1f1+ c2f2+ c3f3, and the value of Y is [0, 1], where c1 is the weight of f1, c2 is the weight of f2, and c3 is the weight of f 3;
the prediction result in step S3 includes:
when 0< Y <0.4, the prediction result is output as safe;
when 0.4< ═ Y < ═ 1, the prediction result is output as a risk.
2. A toxic gas leakage hazard prediction system based on PLC control, which predicts a toxic gas leakage hazard using the prediction method according to claim 1, characterized in that: the prediction system comprises a gas concentration acquisition module, an atmospheric stability acquisition module and a prediction model evaluation module, wherein the gas concentration acquisition module and the atmospheric stability acquisition module are connected with the prediction model evaluation module, the gas concentration acquisition module is used for acquiring gas concentration parameters, the atmospheric stability acquisition module is used for module atmospheric stability parameters, and the prediction model evaluation module carries out prediction evaluation on toxic gas leakage hazards according to the gas concentration parameters and the atmospheric stability parameters;
the gas concentration acquisition module comprises a main acquisition point generation module, a first auxiliary acquisition point generation module, a second auxiliary acquisition point generation module, a timing module, a gas concentration acquisition module, a concentration average value comparison module, a gas concentration first parameter output module, a concentration change value calculation module, a concentration change value comparison module and a gas concentration second parameter output module, wherein the main acquisition point generation module, the first auxiliary acquisition point generation module and the second auxiliary acquisition point generation module are used for generating positions of a main gas acquisition point, a first gas auxiliary acquisition point and a second gas auxiliary acquisition point in a gas acquisition field area, the timing module is used for timing in the gas concentration acquisition process, and the gas concentration acquisition module is used for acquiring gas concentrations at the main gas acquisition point, the first gas auxiliary acquisition point and the second gas auxiliary acquisition point, the concentration average value comparison module is used for comparing the gas concentrations at the main gas acquisition point, the first auxiliary gas acquisition point and the second auxiliary gas acquisition point with a preset concentration average value, the first parameter output module outputs the value of the first parameter of the gas concentration according to the comparison result of the concentration average value comparison module, the concentration change value calculation module is used for calculating the gas concentration change values in unit time at a main gas collection point, a first auxiliary gas collection point and a second auxiliary gas collection point, the concentration change value comparison module is used for comparing gas concentration change values at the main gas acquisition point, the first auxiliary gas acquisition point and the second auxiliary gas acquisition point with preset gas concentration changes, and the gas concentration second parameter output module outputs a value of a second gas concentration parameter according to a comparison result of the concentration change value comparison module.
3. The toxic gas leakage hazard prediction system based on PLC control as claimed in claim 2, wherein: the atmospheric stability acquiring module comprises an atmospheric stability acquiring module and a stability parameter output module, the atmospheric stability acquiring module is used for acquiring local atmospheric stability of a gas acquisition field from a meteorological report, the stability parameter output module is used for outputting atmospheric stability parameters according to the acquired atmospheric stability, the prediction model evaluating module comprises a prediction model calculating module and a prediction result output module, the prediction model calculating module calculates results of the prediction model according to the first gas concentration parameter, the first gas concentration parameter and the atmospheric stability parameters, and the prediction result output module outputs a toxic gas leakage hazard prediction result as safe or dangerous according to the calculation result of the prediction model calculating module.
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Address after: 223001 No.3, Meicheng East Road, Huai'an City, Jiangsu Province Patentee after: Jiangsu electronic information Vocational College Address before: 223005 No. 3 Meicheng Road, Huaian Economic and Technological Development Zone, Jiangsu Province Patentee before: Jiangsu vocationnal college of electronics and information |
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Application publication date: 20200225 Assignee: Huai'an Suxin Technology Information Co.,Ltd. Assignor: Jiangsu electronic information Vocational College Contract record no.: X2023980033107 Denomination of invention: A Toxic Gas Leakage Hazard Prediction System and Method Based on PLC Control Granted publication date: 20220826 License type: Common License Record date: 20230303 |
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