CN116702477B - Leakage source positioning method and system based on atmospheric diffusion model - Google Patents
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Abstract
The invention provides a leakage source positioning method and a leakage source positioning system based on an atmospheric diffusion model, wherein the method comprises the following steps: dynamically modeling a target site based on an atmospheric diffusion model to obtain a site model; dynamically defining a leakage sensing region within the field model; acquiring gas monitoring information of a leakage sensing area from a gas monitoring network preset in a target site; judging whether the gas monitoring information is abnormal or not; and if yes, inputting the gas monitoring information into a site model to perform gas diffusion inversion, and positioning a leakage source. According to the invention, the leakage sensing area where dangerous chemical gas leakage is likely to occur is defined, whether the gas monitoring information of the leakage sensing area is abnormal or not is determined, if yes, the gas is input into the field model for modeling the target field based on the atmospheric diffusion model for gas diffusion inversion, the leakage source is positioned, the inversion resource consumption is greatly reduced, and the efficiency of positioning the leakage source is improved.
Description
Technical Field
The invention relates to the technical field of computer data processing, in particular to a leakage source positioning method and system based on an atmospheric diffusion model.
Background
At present, when radioactive substances, hazardous chemical gases and the like leak, leakage diffusion can be influenced by a wind field, so that the leakage inversion can be performed on the basis of an atmospheric diffusion model to locate the leakage position of the hazardous chemical gases, for example, a source item release inversion and diffusion prediction method based on an integrated atmospheric diffusion model is disclosed in Chinese patent application number CN 201910751569.4: integrating three atmospheric diffusion models of CFD, aermod and Calpuff for simulation calculation of different scales; based on the concept of a smoke plume emergency planning area, aiming at a near-area of a nuclear power plant, namely an inner area of 5km and an outer area of 10km, three atmosphere diffusion models of CFD, aermod and Calpuff are independently adopted for modeling in advance; step three, simultaneously storing various typical wind field calculations, various accident source items, various release rules and concentration change rules monitored or simulated at characteristic positions in a database under various accident situations; and step four, automatically reversing the release position according to the concentration change rule at the characteristic position when the radioactive leakage accident occurs.
However, the above technical solution has a few drawbacks: when the position release position is inverted, inversion is carried out according to the concentration change rules monitored or simulated at a large number of characteristic positions, namely, the concentration monitoring data at each detection point in the field are all input into a model modeled based on an atmospheric diffusion model for inversion, however, the probability of leakage is often different in different areas in the field due to different equipment types, loads and the like in the areas, if the inversion is carried out each time, the inversion resource consumption is overlarge, and the efficiency of positioning the leakage source is lower.
Thus, a solution is needed.
Disclosure of Invention
The invention aims to provide a leakage source positioning method based on an atmospheric diffusion model, which is used for defining a leakage sensing area in which dangerous gas leakage possibly occurs, determining whether gas monitoring information of the leakage sensing area is abnormal, if so, inputting the gas monitoring information into a site model for modeling a target site based on the atmospheric diffusion model for gas diffusion inversion, positioning a leakage source, combining the probability of leakage of different areas in the site, pertinently determining the abnormal gas concentration and inverting the gas diffusion determined to be abnormal to position the leakage source, and the concentration monitoring data at each detection point in the site is not required to be completely input into the model for inversion based on the atmospheric diffusion model, so that inversion resource consumption is greatly reduced, and the efficiency of positioning the leakage source is improved.
The embodiment of the invention provides a leakage source positioning method based on an atmospheric diffusion model, which comprises the following steps:
dynamically modeling a target site based on an atmospheric diffusion model to obtain a site model;
dynamically defining a leakage sensing region within the field model;
acquiring gas monitoring information of a leakage sensing area from a gas monitoring network preset in a target site;
judging whether the gas monitoring information is abnormal or not;
and if yes, inputting the gas monitoring information into a site model to perform gas diffusion inversion, and positioning a leakage source.
Preferably, the dynamic modeling of the target site based on the atmospheric diffusion model includes:
continuously acquiring field information of a target field based on a preset first information acquisition template;
and dynamically modeling the target site according to the site information based on the atmospheric diffusion model to obtain a site model.
Preferably, dynamically delineating the leakage-aware region within the field model includes:
acquiring a defined time interval;
at defined time intervals, the following operations are performed:
defining a leakage sensing region within the field model based on the leakage sensing region defining conditions;
wherein the leakage perception region demarcation conditions include:
the leakage sensing area at least comprises N target devices which are easy to generate hazardous gas leakage at present; n is an integer greater than or equal to 1;
the matching degree between the first target features of adjacent boundary points in boundary points which are spaced from each other by a preset spacing distance on the region boundary of the leakage sensing region is larger than or equal to a preset first matching degree threshold;
the matching degree between the second target feature of the position point which is at a preset distance from the boundary point where the target ray passes through on the target ray and the first target feature of the boundary point where the target ray passes through is smaller than or equal to a second matching degree threshold; the target ray is made from the device location of the target device to the boundary point; the location point is outside the leakage perception area;
the area of the leakage sensing area is smaller than or equal to a preset area threshold value;
the second matching degree threshold value is obtained by inquiring a matching degree threshold value library based on the linear distance between the boundary point traversed by the target ray and the device position, and the second matching degree threshold value in the matching degree threshold value library is reduced along with the increase of the linear distance.
Preferably, the acquiring a defined time interval includes:
based on a preset record monitoring template, monitoring a demarcation requirement record generated in the latest preset time of a preset record source and corresponding generation time;
arranging the defined demand records according to the sequence of the generation time to obtain a record sequence;
determining a first partial sequence from the recorded sequence that satisfies a first sequence condition;
giving a first weight preset for the sequence number of the first partial sequence to obtain a first target value;
determining a second partial sequence from the recorded sequence that satisfies a second sequence condition;
giving a second weight preset for the sequence number of the second partial sequence to obtain a second target value;
giving a third preset weight to the total number of the defined demand records to obtain a third target value;
determining target values of a first target value, a second target value and a third target value and corresponding adjustment coefficients from a preset adjustment coefficient library;
giving a preset initial time interval adjustment coefficient to obtain a defined time interval;
wherein the first sequence condition comprises:
the time difference of the generation time of adjacent demarcation requirement records in the first partial sequence is smaller than or equal to a preset time difference threshold value;
the second sequence conditions include:
the record types of the demarcation requirement records in the second partial sequence are consistent;
the first weight is greater than the second weight and greater than the third weight.
Preferably, the determining process of the target device includes:
acquiring equipment information of any gas equipment in a target site based on a preset second information acquisition template;
analyzing the information type of the equipment information;
determining a search template corresponding to the information type from a preset search template library;
based on the search type template, generating a search type according to the equipment information;
counting a first total number of the search type;
based on the retrieval rule, retrieving from a preset big data platform by utilizing the retrieval rule to obtain a retrieval result; the search rule includes: the number of the search formulas used for searching is gradually increased from 0 to the total number; when the number of the search formulas used for searching is more than or equal to 2, performing AND operation on the search formulas used for searching, and searching based on the AND operation result;
when the search result is not continuously empty, traversing the search result which is not empty in sequence;
each time a traversal is performed, the following operations are performed:
counting the second total number of gas leakage records in the traversed search result;
obtaining a third total number of search formulas used when the traversed search result is searched;
determining a fourth weight corresponding to the ratio of the third total number to the first total number from a preset weight library;
giving a fourth weight to the second total number to obtain a target value;
and after the search result which is not empty is traversed, when the sum of the target value and the target value which is calculated as the target value is equal to or more than the preset target value and the threshold value, the corresponding gas equipment is used as target equipment.
The embodiment of the invention provides a leakage source positioning system based on an atmospheric diffusion model, which comprises the following components:
the on-site model modeling module is used for dynamically modeling the target site based on the atmospheric diffusion model to obtain an on-site model;
the leakage perception area demarcation module is used for dynamically demarcating a leakage perception area in the field model;
the gas monitoring information acquisition module is used for acquiring gas monitoring information of the leakage sensing area from a gas monitoring network preset in the target site;
the gas monitoring information abnormality judging module is used for judging whether the gas monitoring information is abnormal or not;
and the leakage source positioning module is used for inputting the gas monitoring information into the site model to perform gas diffusion inversion when the leakage source is yes, and positioning the leakage source.
Preferably, the in-situ model modeling module dynamically models the target site based on an atmospheric diffusion model, including:
continuously acquiring field information of a target field based on a preset first information acquisition template;
and dynamically modeling the target site according to the site information based on the atmospheric diffusion model to obtain a site model.
Preferably, the leakage sensing area demarcation module dynamically demarcates the leakage sensing area within the field model, including:
acquiring a defined time interval;
at defined time intervals, the following operations are performed:
defining a leakage sensing region within the field model based on the leakage sensing region defining conditions;
wherein the leakage perception region demarcation conditions include:
the leakage sensing area at least comprises N target devices which are easy to generate hazardous gas leakage at present; n is an integer greater than or equal to 1;
the matching degree between the first target features of adjacent boundary points in boundary points which are spaced from each other by a preset spacing distance on the region boundary of the leakage sensing region is larger than or equal to a preset first matching degree threshold;
the matching degree between the second target feature of the position point which is at a preset distance from the boundary point where the target ray passes through on the target ray and the first target feature of the boundary point where the target ray passes through is smaller than or equal to a second matching degree threshold; the target ray is made from the device location of the target device to the boundary point; the location point is outside the leakage perception area;
the area of the leakage sensing area is smaller than or equal to a preset area threshold value;
the second matching degree threshold value is obtained by inquiring a matching degree threshold value library based on the linear distance between the boundary point traversed by the target ray and the device position, and the second matching degree threshold value in the matching degree threshold value library is reduced along with the increase of the linear distance.
Preferably, the leakage sensing area demarcation module obtains a demarcation time interval, including:
based on a preset record monitoring template, monitoring a demarcation requirement record generated in the latest preset time of a preset record source and corresponding generation time;
arranging the defined demand records according to the sequence of the generation time to obtain a record sequence;
determining a first partial sequence from the recorded sequence that satisfies a first sequence condition;
giving a first weight preset for the sequence number of the first partial sequence to obtain a first target value;
determining a second partial sequence from the recorded sequence that satisfies a second sequence condition;
giving a second weight preset for the sequence number of the second partial sequence to obtain a second target value;
giving a third preset weight to the total number of the defined demand records to obtain a third target value;
determining target values of a first target value, a second target value and a third target value and corresponding adjustment coefficients from a preset adjustment coefficient library;
giving a preset initial time interval adjustment coefficient to obtain a defined time interval;
wherein the first sequence condition comprises:
the time difference of the generation time of adjacent demarcation requirement records in the first partial sequence is smaller than or equal to a preset time difference threshold value;
the second sequence conditions include:
the record types of the demarcation requirement records in the second partial sequence are consistent;
the first weight is greater than the second weight and greater than the third weight.
Preferably, the determining process of the target device includes:
acquiring equipment information of any gas equipment in a target site based on a preset second information acquisition template;
analyzing the information type of the equipment information;
determining a search template corresponding to the information type from a preset search template library;
based on the search type template, generating a search type according to the equipment information;
counting a first total number of the search type;
based on the retrieval rule, retrieving from a preset big data platform by utilizing the retrieval rule to obtain a retrieval result; the search rule includes: the number of the search formulas used for searching is gradually increased from 0 to the total number; when the number of the search formulas used for searching is more than or equal to 2, performing AND operation on the search formulas used for searching, and searching based on the AND operation result;
when the search result is not continuously empty, traversing the search result which is not empty in sequence;
each time a traversal is performed, the following operations are performed:
counting the second total number of gas leakage records in the traversed search result;
obtaining a third total number of search formulas used when the traversed search result is searched;
determining a fourth weight corresponding to the ratio of the third total number to the first total number from a preset weight library;
giving a fourth weight to the second total number to obtain a target value;
and after the search result which is not empty is traversed, when the sum of the target value and the target value which is calculated as the target value is equal to or more than the preset target value and the threshold value, the corresponding gas equipment is used as target equipment.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims thereof as well as the appended drawings.
The technical scheme of the invention is further described in detail through the drawings and the embodiments.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate the invention and together with the embodiments of the invention, serve to explain the invention. In the drawings:
FIG. 1 is a schematic diagram of a leakage source positioning method based on an atmospheric diffusion model according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a leakage source positioning system based on an atmospheric diffusion model according to an embodiment of the present invention.
Detailed Description
The preferred embodiments of the present invention will be described below with reference to the accompanying drawings, it being understood that the preferred embodiments described herein are for illustration and explanation of the present invention only, and are not intended to limit the present invention.
The embodiment of the invention provides a leakage source positioning method based on an atmospheric diffusion model, which is shown in fig. 1 and comprises the following steps:
step S1: dynamically modeling a target site based on an atmospheric diffusion model to obtain a site model; the atmospheric diffusion model can be an aeromod atmospheric diffusion model and the like; the target site can be a hazardous chemical gas plant, a nuclear power plant and the like;
step S2: dynamically defining a leakage sensing region within the field model; the defined leakage sensing area is an area in the target site where dangerous chemical gas leakage is likely to occur currently;
step S3: acquiring gas monitoring information of a leakage sensing area from a gas monitoring network preset in a target site; the gas monitoring network consists of a plurality of sensors for monitoring the concentration of hazardous chemical gas, and each sensor is arranged at a preset position in a target site in advance;
step S4: judging whether the gas monitoring information is abnormal or not; the dangerous chemical gas concentration is abnormal when higher;
step S5: and if yes, inputting the gas monitoring information into a site model to perform gas diffusion inversion, and positioning a leakage source. Inversion positioning leakage sources belong to the category of the prior art and are not described in detail.
The working principle and the beneficial effects of the technical scheme are as follows:
according to the method, the leakage sensing area where dangerous chemical gas leakage can occur is defined, whether gas monitoring information of the leakage sensing area is abnormal or not is determined, if yes, the gas monitoring information is input into the field model for modeling the target field based on the atmospheric diffusion model, the leakage source is positioned by combining the leakage probability of different areas in the field, the gas concentration abnormality determination and the gas diffusion inversion after abnormality determination are performed pertinently, the leakage source is positioned, the concentration monitoring data of the positions of all detection points in the field are not required to be completely input into the model for inversion after modeling based on the atmospheric diffusion model, inversion resource consumption is greatly reduced, and the efficiency of positioning the leakage source is improved.
In one embodiment, dynamically modeling a target site based on an atmospheric diffusion model includes:
continuously acquiring field information of a target field based on a preset first information acquisition template; the site information includes: surface parameters, meteorological data, etc.;
and dynamically modeling the target site according to the site information based on the atmospheric diffusion model to obtain a site model. The modeling of the target site based on the atmospheric diffusion model and obtaining the site information required by the modeling belong to the prior art category (for example, the description of [0040] to [0041] and [0046] to [0047] of a source term release inversion and diffusion prediction method based on the integrated atmospheric diffusion model in chinese patent application No. CN 201910751569.4) are all described, and are not described in detail. And continuously acquiring field information, and updating the field model after each acquisition to realize dynamic modeling.
In one embodiment, dynamically delineating a leakage-aware region within a field model includes:
acquiring a defined time interval; the time interval is defined as, for example: 10 minutes; the leakage sensing area is carried out once at intervals of a defined time interval, so that dynamic definition is realized;
at defined time intervals, the following operations are performed:
defining a leakage sensing region within the field model based on the leakage sensing region defining conditions;
wherein the leakage perception region demarcation conditions include:
the leakage sensing area at least comprises N target devices which are easy to generate hazardous gas leakage at present; n is an integer greater than or equal to 1;
the matching degree between the first target features of adjacent boundary points in boundary points which are spaced from each other by a preset spacing distance on the region boundary of the leakage sensing region is larger than or equal to a preset first matching degree threshold; the separation distance is, for example: 1.5 meters; the first matching degree threshold is, for example: 80; the first target feature is a meteorological feature (wind speed, wind direction, etc.); when this condition is satisfied, the leakage sensing region may be a diffusion region after gas leakage (generally, when hazardous gas diffuses with a wind field, the change of the wind speed and the wind direction of the diffusion boundary will not be too great, that is, the matching degree is greater than or equal to the first matching degree threshold value);
the matching degree between the second target feature of the position point which is at a preset distance from the boundary point where the target ray passes through on the target ray and the first target feature of the boundary point where the target ray passes through is smaller than or equal to a second matching degree threshold; the target ray is made from the device location of the target device to the boundary point; the location point is outside the leakage perception area; the preset distance is, for example: 2 meters; the second target feature is also a meteorological feature (wind speed, wind direction, etc.); when the condition is met, the maximum area after the dangerous chemical gas leakage along with the wind field is diffused for the target equipment (generally, the wind speed and the wind direction of each position inside the diffusion area after the dangerous chemical gas leakage along with the wind field are not greatly different, and the boundary of the diffusion area is greatly different from the wind speed and the wind direction outside the boundary, for example, the boundary wind speed of the diffusion area is 3m/s, and the wind speed of a certain position outside the boundary is 0m/s, namely, the matching degree is smaller than or equal to a second matching degree threshold value);
the area of the leakage sensing area is smaller than or equal to a preset area threshold value; the area threshold is, for example: 200 square meters; when the condition is met, the leakage sensing area is not oversized, and the diffusion area at the initial stage of diffusion along with the diffusion of the wind field after the hazardous chemical gas leaks is not oversized, so that the demarcation rationality is improved;
the second matching degree threshold value is obtained by inquiring a matching degree threshold value library based on the linear distance between the boundary point traversed by the target ray and the device position, and the second matching degree threshold value in the matching degree threshold value library is reduced along with the increase of the linear distance. The second matching degree threshold values corresponding to different linear distances are arranged in the matching degree threshold value library, and the larger the linear distance is, the more the dangerous chemical gas is diffused along with the wind field after leakage, the more complex the wind field is affected by the dangerous chemical gas, so that in order to reduce the demarcation error, the judgment standard, namely the second matching degree threshold value is reduced, the demarcated leakage sensing area is properly increased, and the application practice is more met.
The working principle and the beneficial effects of the technical scheme are as follows:
when the embodiment of the invention is used for defining the leakage sensing area, the leakage sensing area defining condition is introduced, so that the efficiency, the accuracy and the rationality of defining the leakage sensing area are improved.
In one embodiment, acquiring the delineated time interval comprises:
based on a preset record monitoring template, monitoring a demarcation requirement record generated in the latest preset time of a preset record source and corresponding generation time; the delineating the demand record is a record of the delineating the demand of the leakage sensing area in the reaction site model, such as: a target device number increase record (the more the target devices increase, the higher the possibility of dangerous chemical gas leakage in the target site is indicated), a wind field change record (the more wind field changes, the more dangerous chemical gas leakage is indicated if the dangerous chemical gas leakage occurs, the more the dangerous chemical gas leakage diffusion is affected by the wind field, the more the leakage sensing area is required to be defined in advance) and the like;
arranging the defined demand records according to the sequence of the generation time to obtain a record sequence;
determining a first partial sequence from the recorded sequence that satisfies a first sequence condition; the greater the number of first partial sequences, the more the leakage perception region definition is required;
giving a first weight preset for the sequence number of the first partial sequence to obtain a first target value; the first weight is, for example: 8, 8; when the method is endowed, multiplying the first weight by the sequence number of the first partial sequence to obtain a first target value;
determining a second partial sequence from the recorded sequence that satisfies a second sequence condition; the greater the number of second partial sequences, the more the leakage perception region definition is required;
giving a second weight preset for the sequence number of the second partial sequence to obtain a second target value; the second weight is, for example: 6, preparing a base material; when the method is endowed, multiplying a second weight by the number of sequences of a second partial sequence to obtain a second target value;
giving a third preset weight to the total number of the defined demand records to obtain a third target value; when the method is endowed, multiplying a third weight by the total number of the demarcation requirement records to obtain a third target value;
determining target values of a first target value, a second target value and a third target value and corresponding adjustment coefficients from a preset adjustment coefficient library; the adjustment coefficient library has different target values and corresponding adjustment coefficients, the larger the target values are, the more the leakage sensing area is required to be defined, and the smaller the adjustment coefficients are, the smaller the initial time interval is;
giving a preset initial time interval adjustment coefficient to obtain a defined time interval; the initial time interval is, for example: 20 minutes;
wherein the first sequence condition comprises:
the time difference of the generation time of adjacent demarcation requirement records in the first partial sequence is smaller than or equal to a preset time difference threshold value; the time difference threshold is, for example: 4 hours; when the condition is met, the frequent generation of the definition requirement records is indicated, and the greater the definition requirement of the leakage sensing area is;
the second sequence conditions include:
the record types of the demarcation requirement records in the second partial sequence are consistent; the record type is the increase of the number of target devices, etc.; when the condition is met, the more the definition requirement records of the same record type are continuously generated, the greater the definition requirement of the leakage sensing area can be stated;
the first weight is greater than the second weight and greater than the third weight. When determining the total leakage perception region demarcation requirement, namely the target value and the target value, the frequent condition of demarcation requirement record generation is more observed, the condition of demarcation requirement record of the same record type is continuously generated by secondary observation, and finally the total number of demarcation requirement records is observed, so that the first weight is set to be larger than the second weight and larger than the third weight.
The working principle and the beneficial effects of the technical scheme are as follows:
when determining the demarcation time interval, introducing a target value, an adjustment coefficient library and the like, rapidly determining the current optimum demarcation time interval, and aiming at different situations, having the optimum demarcation time interval, further reducing inversion resources and having particular applicability.
In one embodiment, the determining of the target device includes:
acquiring equipment information of any gas equipment in a target site based on a preset second information acquisition template; the gas equipment is equipment for storing and transmitting hazardous chemical gas; the device information includes: model, time length for putting into use, history maintenance condition, current working condition and the like;
analyzing the information type of the equipment information; the information types are as follows: model number, etc.;
determining a search template corresponding to the information type from a preset search template library; the search type template library is provided with search type templates corresponding to different information types, and the search type templates are templates for generating search type according to equipment information under the information types;
based on the search type template, generating a search type according to the equipment information; the search type is used for searching leakage events generated by other gas equipment with equipment information; the search is, for example: the equipment information is the model R8, and the retrieval type is the model R8 of the gas equipment;
counting a first total number of the search type;
based on the retrieval rule, retrieving from a preset big data platform by utilizing the retrieval rule to obtain a retrieval result; the search rule includes: the number of the search formulas used for searching is gradually increased from 0 to the total number; when the number of the search formulas used for searching is more than or equal to 2, performing AND operation on the search formulas used for searching, and searching based on the AND operation result; the big data platform stores a large number of leakage events generated by other gas equipment; when the search formula is used, the search is sequentially carried out by a single search formula, then 2 search formulas are randomly selected for carrying out AND operation, and the like; when searching is performed by using the search formula after the AND operation, the search result simultaneously satisfies a plurality of search formulas for performing the AND operation;
when the search result is not continuously empty, traversing the search result which is not empty in sequence;
each time a traversal is performed, the following operations are performed:
counting the second total number of gas leakage records in the traversed search result;
obtaining a third total number of search formulas used when the traversed search result is searched;
determining a fourth weight corresponding to the ratio of the third total number to the first total number from a preset weight library; the larger the third total number is in the first total number, the more the search formula is used, the search result which is not empty can be searched, and the leakage event is indirectly indicated that other gas equipment with the same equipment information as the gas equipment exists;
giving a fourth weight to the second total number to obtain a target value; when the target value is given, multiplying the second total number by the fourth weight to obtain the target value;
and after the search result which is not empty is traversed, when the sum of the target value and the target value which is calculated as the target value is equal to or more than the preset target value and the threshold value, the corresponding gas equipment is used as target equipment. The larger the target value sum, the more likely the gas apparatus is that gas leakage is likely to occur as the target apparatus.
The working principle and the beneficial effects of the technical scheme are as follows:
when the target equipment is determined, a search formula is generated based on the equipment information, whether other gas equipment with the same equipment information has a gas leakage event or not is searched from the big data platform, whether the current gas equipment has leakage possibility or not is comprehensively determined, and the accuracy of the determination of the target equipment is improved. In addition, the search rule, the duty ratio, the fourth weight, the target value sum and the like are introduced, so that the accuracy of determining the target equipment is further improved, and the determining efficiency of the target equipment is further improved.
The embodiment of the invention provides a leakage source positioning system based on an atmospheric diffusion model, as shown in fig. 2, comprising:
the field model modeling module 1 is used for dynamically modeling a target field based on an atmospheric diffusion model to obtain a field model;
a leakage sensing region defining module 2 for dynamically defining a leakage sensing region within the field model;
the gas monitoring information acquisition module 3 is used for acquiring gas monitoring information of the leakage sensing area from a gas monitoring network preset in the target site;
the gas monitoring information abnormality judging module 4 is used for judging whether the gas monitoring information is abnormal or not;
and the leakage source positioning module 5 is used for inputting the gas monitoring information into the site model to perform gas diffusion inversion when the leakage source is yes, and positioning the leakage source.
In one embodiment, the site model modeling module 1 dynamically models a target site based on an atmospheric diffusion model, comprising:
continuously acquiring field information of a target field based on a preset first information acquisition template;
and dynamically modeling the target site according to the site information based on the atmospheric diffusion model to obtain a site model.
In one embodiment, the leakage sensing area demarcation module 2 dynamically demarcates the leakage sensing area within the field model, comprising:
acquiring a defined time interval;
at defined time intervals, the following operations are performed:
defining a leakage sensing region within the field model based on the leakage sensing region defining conditions;
wherein the leakage perception region demarcation conditions include:
the leakage sensing area at least comprises N target devices which are easy to generate hazardous gas leakage at present; n is an integer greater than or equal to 1;
the matching degree between the first target features of adjacent boundary points in boundary points which are spaced from each other by a preset spacing distance on the region boundary of the leakage sensing region is larger than or equal to a preset first matching degree threshold;
the matching degree between the second target feature of the position point which is at a preset distance from the boundary point where the target ray passes through on the target ray and the first target feature of the boundary point where the target ray passes through is smaller than or equal to a second matching degree threshold; the target ray is made from the device location of the target device to the boundary point; the location point is outside the leakage perception area;
the area of the leakage sensing area is smaller than or equal to a preset area threshold value;
the second matching degree threshold value is obtained by inquiring a matching degree threshold value library based on the linear distance between the boundary point traversed by the target ray and the device position, and the second matching degree threshold value in the matching degree threshold value library is reduced along with the increase of the linear distance.
In one embodiment, the leakage perception region demarcation module 2 obtains a demarcation time interval comprising:
based on a preset record monitoring template, monitoring a demarcation requirement record generated in the latest preset time of a preset record source and corresponding generation time;
arranging the defined demand records according to the sequence of the generation time to obtain a record sequence;
determining a first partial sequence from the recorded sequence that satisfies a first sequence condition;
giving a first weight preset for the sequence number of the first partial sequence to obtain a first target value;
determining a second partial sequence from the recorded sequence that satisfies a second sequence condition;
giving a second weight preset for the sequence number of the second partial sequence to obtain a second target value;
giving a third preset weight to the total number of the defined demand records to obtain a third target value;
determining target values of a first target value, a second target value and a third target value and corresponding adjustment coefficients from a preset adjustment coefficient library;
giving a preset initial time interval adjustment coefficient to obtain a defined time interval;
wherein the first sequence condition comprises:
the time difference of the generation time of adjacent demarcation requirement records in the first partial sequence is smaller than or equal to a preset time difference threshold value;
the second sequence conditions include:
the record types of the demarcation requirement records in the second partial sequence are consistent;
the first weight is greater than the second weight and greater than the third weight.
In one embodiment, the determining of the target device includes:
acquiring equipment information of any gas equipment in a target site based on a preset second information acquisition template;
analyzing the information type of the equipment information;
determining a search template corresponding to the information type from a preset search template library;
based on the search type template, generating a search type according to the equipment information;
counting a first total number of the search type;
based on the retrieval rule, retrieving from a preset big data platform by utilizing the retrieval rule to obtain a retrieval result; the search rule includes: the number of the search formulas used for searching is gradually increased from 0 to the total number; when the number of the search formulas used for searching is more than or equal to 2, performing AND operation on the search formulas used for searching, and searching based on the AND operation result;
when the search result is not continuously empty, traversing the search result which is not empty in sequence;
each time a traversal is performed, the following operations are performed:
counting the second total number of gas leakage records in the traversed search result;
obtaining a third total number of search formulas used when the traversed search result is searched;
determining a fourth weight corresponding to the ratio of the third total number to the first total number from a preset weight library;
giving a fourth weight to the second total number to obtain a target value;
and after the search result which is not empty is traversed, when the sum of the target value and the target value which is calculated as the target value is equal to or more than the preset target value and the threshold value, the corresponding gas equipment is used as target equipment.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (8)
1. A leakage source positioning method based on an atmospheric diffusion model, comprising:
dynamically modeling a target site based on an atmospheric diffusion model to obtain a site model;
dynamically defining a leakage sensing region within the field model;
acquiring gas monitoring information of the leakage sensing area from a gas monitoring network preset in the target site;
judging whether the gas monitoring information is abnormal or not;
if yes, inputting the gas monitoring information into the site model to perform gas diffusion inversion, and positioning a leakage source;
the dynamically delimiting a leakage perception region within the field model comprises:
acquiring a defined time interval;
and executing the following operations at intervals of the defined time intervals:
defining a leakage perception region within the field model based on leakage perception region defining conditions;
wherein the leakage perception region demarcation conditions include:
the leakage sensing area at least comprises N target devices which are easy to generate hazardous chemical gas leakage at present; n is an integer greater than or equal to 1;
the matching degree between the first target features of adjacent boundary points in boundary points which are spaced from each other by a preset spacing distance on the region boundary of the leakage perception region is larger than or equal to a preset first matching degree threshold;
the matching degree between a second target feature of a position point, which is on the target ray and is at a preset distance from the boundary point, and the first target feature of the boundary point, which is on the target ray, is less than or equal to a second matching degree threshold; the target ray is generated from the device position of the target device to the boundary point; the location point is outside the leakage perception area;
the area of the leakage sensing area is smaller than or equal to a preset area threshold value;
the second matching degree threshold is obtained by inquiring a matching degree threshold library based on the linear distance between the boundary point traversed by the target ray and the equipment position, and the second matching degree threshold in the matching degree threshold library is reduced along with the increase of the linear distance.
2. The method for positioning a leakage source based on an atmospheric diffusion model according to claim 1, wherein the dynamic modeling of a target site based on the atmospheric diffusion model comprises:
continuously acquiring the field information of the target field based on a preset first information acquisition template;
and dynamically modeling the target site according to the site information based on the atmospheric diffusion model to obtain the site model.
3. The method for locating a leakage source based on an atmospheric diffusion model according to claim 1, wherein said acquiring defines a time interval, comprising:
based on a preset record monitoring template, monitoring a demarcation requirement record generated in the latest preset time of a preset record source and corresponding generation time;
arranging the demarcation requirement records according to the sequence of the generation time to obtain a record sequence;
determining a first partial sequence from the recorded sequence that satisfies a first sequence condition;
giving a first weight preset for the sequence number of the first partial sequence to obtain a first target value;
determining a second partial sequence from the recorded sequence that satisfies a second sequence condition;
giving a second weight preset for the sequence number of the second partial sequence to obtain a second target value;
giving a third preset weight to the total number of the demarcation requirement records to obtain a third target value;
determining target values of the first target value, the second target value and the third target value and corresponding adjustment coefficients from a preset adjustment coefficient library;
giving a preset initial time interval the adjustment coefficient to obtain the demarcation time interval;
wherein the first sequence condition comprises:
the time difference between the generation time adjacent to the demarcation demand record in the first partial sequence is less than or equal to a preset time difference threshold;
the second sequence conditions include:
the record types of the demarcation demand records in the second partial sequence are consistent;
the first weight is greater than the second weight than the third weight.
4. The leakage source positioning method based on an atmospheric diffusion model according to claim 1, wherein the determining process of the target device comprises:
acquiring equipment information of any gas equipment in the target site based on a preset second information acquisition template;
analyzing the information type of the equipment information;
determining a search template corresponding to the information type from a preset search template library;
generating a search formula according to the equipment information based on the search formula template;
counting a first total number of the retrievals;
based on the retrieval rule, retrieving from a preset big data platform by utilizing the retrieval rule to obtain a retrieval result; the search rule includes: the number of search formulas used for searching is gradually increased from 0 to the total number; when the number of the search formulas used for searching is more than or equal to 2, performing AND operation on the search formulas used for searching, and searching based on the AND operation result;
when the search result is not continuously empty, traversing the search result which is not empty in sequence;
each time a traversal is performed, the following operations are performed:
counting the second total number of gas leakage records in the traversed search result;
obtaining a third total number of the search formulas utilized when the traversed search result is searched;
determining a fourth weight corresponding to the ratio of the third total number to the first total number from a preset weight library;
giving the fourth weight to the second total number to obtain a target value;
and after the search result which is not empty is traversed, when the target value sum of the target values is calculated in an accumulated mode and is larger than or equal to a preset target value sum and a preset threshold value sum, the corresponding gas equipment is used as the target equipment.
5. A leakage source localization system based on an atmospheric diffusion model, comprising:
the on-site model modeling module is used for dynamically modeling the target site based on the atmospheric diffusion model to obtain an on-site model;
the leakage sensing area demarcation module is used for dynamically demarcating a leakage sensing area in the field model;
the gas monitoring information acquisition module is used for acquiring gas monitoring information of the leakage sensing area from a gas monitoring network preset in the target site;
the gas monitoring information abnormality judging module is used for judging whether the gas monitoring information is abnormal or not;
the leakage source positioning module is used for inputting the gas monitoring information into the site model to perform gas diffusion inversion when the leakage source positioning module is yes, and positioning a leakage source;
the leakage perception region demarcation module dynamically demarcates a leakage perception region within the field model, comprising:
acquiring a defined time interval;
and executing the following operations at intervals of the defined time intervals:
defining a leakage perception region within the field model based on leakage perception region defining conditions;
wherein the leakage perception region demarcation conditions include:
the leakage sensing area at least comprises N target devices which are easy to generate hazardous chemical gas leakage at present; n is an integer greater than or equal to 1;
the matching degree between the first target features of adjacent boundary points in boundary points which are spaced from each other by a preset spacing distance on the region boundary of the leakage perception region is larger than or equal to a preset first matching degree threshold;
the matching degree between a second target feature of a position point, which is on the target ray and is at a preset distance from the boundary point, and the first target feature of the boundary point, which is on the target ray, is less than or equal to a second matching degree threshold; the target ray is generated from the device position of the target device to the boundary point; the location point is outside the leakage perception area;
the area of the leakage sensing area is smaller than or equal to a preset area threshold value;
the second matching degree threshold is obtained by inquiring a matching degree threshold library based on the linear distance between the boundary point traversed by the target ray and the equipment position, and the second matching degree threshold in the matching degree threshold library is reduced along with the increase of the linear distance.
6. The atmospheric diffusion model-based leak source localization system of claim 5, wherein the site model modeling module dynamically models the target site based on the atmospheric diffusion model, comprising:
continuously acquiring the field information of the target field based on a preset first information acquisition template;
and dynamically modeling the target site according to the site information based on the atmospheric diffusion model to obtain the site model.
7. The atmospheric diffusion model based leak source localization system of claim 5, wherein the leak sensing area demarcation module obtains a demarcation time interval comprising:
based on a preset record monitoring template, monitoring a demarcation requirement record generated in the latest preset time of a preset record source and corresponding generation time;
arranging the demarcation requirement records according to the sequence of the generation time to obtain a record sequence;
determining a first partial sequence from the recorded sequence that satisfies a first sequence condition;
giving a first weight preset for the sequence number of the first partial sequence to obtain a first target value;
determining a second partial sequence from the recorded sequence that satisfies a second sequence condition;
giving a second weight preset for the sequence number of the second partial sequence to obtain a second target value;
giving a third preset weight to the total number of the demarcation requirement records to obtain a third target value;
determining target values of the first target value, the second target value and the third target value and corresponding adjustment coefficients from a preset adjustment coefficient library;
giving a preset initial time interval the adjustment coefficient to obtain the demarcation time interval;
wherein the first sequence condition comprises:
the time difference between the generation time adjacent to the demarcation demand record in the first partial sequence is less than or equal to a preset time difference threshold;
the second sequence conditions include:
the record types of the demarcation demand records in the second partial sequence are consistent;
the first weight is greater than the second weight than the third weight.
8. A leakage source localization system based on an atmospheric diffusion model as defined in claim 5, wherein said target device determination comprises:
acquiring equipment information of any gas equipment in the target site based on a preset second information acquisition template;
analyzing the information type of the equipment information;
determining a search template corresponding to the information type from a preset search template library;
generating a search formula according to the equipment information based on the search formula template;
counting a first total number of the retrievals;
based on the retrieval rule, retrieving from a preset big data platform by utilizing the retrieval rule to obtain a retrieval result; the search rule includes: the number of search formulas used for searching is gradually increased from 0 to the total number; when the number of the search formulas used for searching is more than or equal to 2, performing AND operation on the search formulas used for searching, and searching based on the AND operation result;
when the search result is not continuously empty, traversing the search result which is not empty in sequence;
each time a traversal is performed, the following operations are performed:
counting the second total number of gas leakage records in the traversed search result;
obtaining a third total number of the search formulas utilized when the traversed search result is searched;
determining a fourth weight corresponding to the ratio of the third total number to the first total number from a preset weight library;
giving the fourth weight to the second total number to obtain a target value;
and after the search result which is not empty is traversed, when the target value sum of the target values is calculated in an accumulated mode and is larger than or equal to a preset target value sum and a preset threshold value sum, the corresponding gas equipment is used as the target equipment.
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