Gas detection analysis early warning method and system

Abstract

The invention discloses a gas detection, analysis and early warning method and system, which are suitable for a high-risk indoor environment needing strict gas safety management, and can judge the leakage condition of risk gas in time through global gas monitoring and diffusion simulation monitoring of the internal environment. And local airflow circulation control in a selected range is carried out according to the diffusion state, so that risk gas recovery and harmless treatment are carried out, harmful gas is effectively prevented from being diffused to the outside, and meanwhile, different from an overall airflow circulation mode, the situation that the whole space is filled with the harmful gas due to diffusion type diffusion caused by overall airflow circulation can be effectively avoided; risks to internal workers are reduced, dispersive diffusion of harmful gas is avoided, non-stop maintenance can be achieved, and the influence of harmful gas leakage on a production line is reduced to the minimum.

Description

Technical Field

[0001] The present invention relates to the field related to gas detection and early warning, and in particular to a gas detection, analysis and early warning method and system. Background Art

[0002] In some production and experimental scenarios, due to the high toxicity of the gases generated or used in the process, the direct emission of these toxic and harmful gases will cause safety impacts on the organisms in the external environment. Therefore, strict gas control is required. Usually, isolation measures are used to make the space closed to prevent harmful gases from entering the external natural ecosystem when they leak.

[0003] In the prior art, in order to deal with the leakage of harmful gases in the internal environment and ensure the safety of the internal personnel, the harmful gases contained are usually filtered out by circulating the gas in the whole room. However, the disadvantage of this is that when the harmful gases diffuse, the indoor gas circulation method will cause the diffused harmful gases to diffuse further faster, and even diffuse and fill the entire room. This is obviously very dangerous to the workers in actual situations. Summary of the invention

[0004] The purpose of the present invention is to provide a gas detection analysis and early warning method to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions: A gas detection analysis and early warning method, comprising: Acquire spatial scanning data of the monitoring area, clean the spatial scanning data, and establish a twin monitoring space by matching the preset scale, where the scale is used to balance the amount of data with the available computing power. The gas monitoring data of multiple points are obtained through a plurality of gas sensing devices arranged in a distributed manner, and the gas monitoring data are mapped in the twin monitoring space based on the point information. The gas monitoring data is used to characterize the gas type, gas concentration and gas flow rate of the current point; Performing a gas diffusion simulation based on the interval-updated gas monitoring data to obtain a gas diffusion distribution, wherein the diffusion distribution is used to characterize a diffusion area of ​​the target gas and a concentration state at different locations in the area before the next interval update; The location distribution of several gas processing circulation ports is obtained to generate multiple groups of gas processing flow ranges, and cross-risk judgments are made based on personnel distribution information and target gases to generate risk warnings and feedback.

[0006] As a further solution of the present invention: the step of obtaining the position distribution of several gas processing circulation ports to generate multiple groups of gas processing flow ranges, making cross-risk judgments based on personnel distribution information and target gases, generating risk warnings and providing feedback specifically includes: Obtaining the position distribution of several gas processing circulation ports and mapping them in the twin monitoring space, assigning values ​​to the multiple gas processing circulation ports so that they can perform airflow state control, wherein the airflow state control includes airflow engulfment, airflow output, and device shutdown; Based on the twin monitoring space, multiple gas processing circulation ports are connected and blocked. If there is no structural partition between a pair of gas processing circulation ports, a circulation group is generated accordingly. Each circulation group corresponds to a flow range, and the flow range is used to characterize the concentrated flow area of ​​the gas flow when a pair of gas processing circulation ports in the circulation group are working. Acquire multiple groups of circulation groups covering the target gas diffusion area, determine the overlapping areas between the circulation ranges of the multiple circulation groups and the personnel distribution information representation area, and select the circulation group combination with the lowest overlapping area to establish a risk treatment plan; A risk warning is generated and outputted based on the overlapping area and the risk level of the target gas. The risk warning is used to characterize the risk gas type, risk coverage area and safety impact range.

[0007] As a further solution of the present invention: it also includes the steps of: Obtaining the pipeline structure distribution in the monitoring area and the gas holding information corresponding to the pipeline, and synchronizing the information in the twin monitoring space; The concentration contours of the target gas are delineated by using multiple groups of the gas monitoring data, the leakage area is screened according to the concentration contours, and the pipelines are screened according to the gas type of the target gas to preliminarily locate the risk source range and risk pipeline objects.

[0008] As a further solution of the present invention: in the step of performing gas diffusion simulation based on the gas monitoring data updated at intervals to obtain the diffusion distribution of the gas, the gas diffusion process obeys the CFD fluid simulation model, specifically comprising the steps of: An environmental model of a CFD fluid simulation model is constructed based on the spatial structure of the twin monitoring space, wherein the structural edge of the environmental model is used to generate a simulation space boundary; Dividing a fitting grid in the twin monitoring space, and when a leak occurs, increasing the fitting grid density in the diffusion area; Based on the gas monitoring data, the boundary conditions of the environmental model are assigned, and the gas diffusion simulation is performed through the turbulence model. The boundary conditions are used to characterize the roughness of the edge of the environmental model structure and the wind speed profile of the model.

[0009] As a further solution of the present invention: it also includes the steps of: Perform interval grouping based on the spatial distribution of the gas sensing devices to obtain two sets of gas sensing devices; Initialize multiple gas sensing devices in the same gas sensing device set at a preset calibration time interval, and synchronise the time axes of the multiple gas sensing devices; Control multiple gas sensing devices to perform a gas monitoring, obtain data feedback, calculate the time interval of the data feedback and set it as the delay constant of the current sensing device.

[0010] The embodiment of the present invention aims to provide a gas detection analysis and early warning system, comprising: The spatial modeling module is used to obtain the spatial scanning data of the monitoring area, clean the spatial scanning data, and establish a twin monitoring space by matching the preset scale, where the scale is used to balance the data volume with the available computing power. A monitoring synchronization module is used to obtain gas monitoring data of multiple points through a plurality of distributed gas sensing devices, and map the gas monitoring data in the twin monitoring space based on the point information, wherein the gas monitoring data is used to characterize the gas type, gas concentration and gas flow rate of the current point; A diffusion fitting module, used for performing gas diffusion simulation based on the gas monitoring data updated at intervals to obtain the diffusion distribution of the gas, wherein the diffusion distribution is used to characterize the diffusion area of ​​the target gas and the concentration state at different positions in the area before the next interval update; The early warning feedback module is used to obtain the location distribution of several gas processing circulation ports to generate multiple groups of gas processing flow ranges, make cross-risk judgments based on personnel distribution information and target gases, generate risk warnings and provide feedback.

[0011] As a further solution of the present invention: the early warning feedback module includes: A circulation mapping unit, used to obtain the position distribution of multiple gas processing circulation ports and map them in the twin monitoring space, assign values ​​to multiple gas processing circulation ports so that they can perform airflow state control, wherein the airflow state control includes airflow engulfment, airflow output, and device shutdown; A processing and evaluation unit is used to judge the connection occlusion of multiple gas processing circulation ports based on the twin monitoring space. If there is no structural partition between a pair of gas processing circulation ports, a circulation group is generated accordingly. Each of the circulation groups corresponds to a flow range, and the flow range is used to characterize the concentrated flow area of ​​the gas flow when a pair of gas processing circulation ports in the circulation group are working; A scheme optimization unit is used to obtain multiple groups of circulation groups covering the target gas diffusion area, and determine the overlapping area between the circulation ranges of multiple circulation groups and the personnel distribution information representation area, and select the circulation group combination with the lowest overlapping area to establish a risk treatment plan; The warning feedback unit is used to generate and output a risk warning based on the overlapping area and the risk level of the target gas. The risk warning is used to characterize the risk gas type, risk coverage area and safety impact range.

[0012] As a further solution of the present invention: it also includes a traceability and limit reduction module: A pipeline synchronization unit, used to obtain the pipeline structure distribution in the monitoring area and the gas holding information corresponding to the pipeline, and synchronize the information in the twin monitoring space; The pipeline reduction unit is used to define the concentration contour of the target gas through multiple groups of gas monitoring data, screen the leakage area according to the concentration contour, and screen the pipeline according to the gas type of the target gas to preliminarily locate the risk source range and risk pipeline object.

[0013] As a further solution of the present invention: in the diffusion fitting module, the gas diffusion process obeys the CFD fluid simulation model, specifically including: A model building unit, used for building an environmental model of a CFD fluid simulation model based on the spatial structure of the twin monitoring space, wherein the structural edge of the environmental model is used to generate a simulation space boundary; An accuracy limiting unit, used to divide the fitting grid in the twin monitoring space, and when a leak occurs, increase the fitting grid density of the diffusion area; The diffusion fitting unit is used to assign values ​​based on gas monitoring data, set the boundary conditions of the environmental model, and simulate gas diffusion through a turbulence model. The boundary conditions are used to characterize the roughness of the edge of the environmental model structure and the wind speed profile of the model.

[0014] As a further solution of the present invention: it also includes a delay optimization module, specifically including: A grouping unit, used for performing interval grouping based on the spatial distribution of the gas sensing devices to obtain two sets of gas sensing devices; An initialization unit, used to initialize multiple gas sensing devices in the same gas sensing device set at a preset calibration time interval, and to synchronize and correct the time axes of the multiple gas sensing devices; The delay optimization unit is used to control multiple gas sensing devices to perform a gas monitoring and obtain their data feedback, calculate the time interval of the data feedback and set it as the delay constant of the current sensing device.

[0015] Compared with the prior art, the beneficial effects of the present invention are: it is suitable for high-risk indoor environments that require strict gas safety management, and through global gas monitoring and diffusion simulation monitoring of the internal environment, it can timely judge the leakage of risky gases, and perform local airflow circulation control in a selected range according to the diffusion state, so as to recover and harmlessly treat the risky gases, and effectively avoid the diffusion of harmful gases to the outside. At the same time, different from the overall airflow circulation method, it can effectively avoid the diffuse diffusion of harmful gases caused by the overall airflow circulation and fill the entire space, reducing the risk to internal staff, and avoiding the diffuse diffusion of harmful gases can also achieve non-stop maintenance, minimizing the impact of harmful gas leakage on the production line. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The present invention is a flowchart of a gas detection analysis and early warning method.

[0017] Figure 2 The present invention is a flowchart of a delay correction step in a gas detection analysis and early warning method.

[0018] Figure 3 The figure is a block diagram of the composition of a gas detection, analysis and early warning system. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0020] The specific implementation of the present invention is described in detail below in conjunction with specific embodiments.

[0021] like Figure 1 The gas detection analysis and early warning method provided in one embodiment of the present invention comprises the following steps: S10, obtaining spatial scanning data of the monitoring area, performing data cleaning on the spatial scanning data, and establishing a twin monitoring space by matching a preset scale, wherein the scale is used to balance the data volume with the available computing power; S20, acquiring gas monitoring data of multiple points through a plurality of gas sensing devices arranged in a distributed manner, and mapping the gas monitoring data in the twin monitoring space based on the point information, wherein the gas monitoring data is used to characterize the gas type, gas concentration, and gas flow rate of the current point; S30, performing a gas diffusion simulation based on the interval-updated gas monitoring data to obtain a diffusion distribution of the gas, wherein the diffusion distribution is used to characterize a diffusion area of ​​the target gas and a concentration state at different locations in the area before the next interval update; S40, obtaining the position distribution of several gas processing circulation ports to generate multiple groups of gas processing flow ranges, performing cross-risk judgment based on personnel distribution information and target gas, generating risk warning and feedback.

[0022] In this embodiment, a gas detection analysis and early warning method is provided, which is suitable for high-risk indoor environments that require strict gas safety management. Through global gas monitoring and diffusion simulation monitoring of the internal environment, the leakage of risky gases can be judged in a timely manner, and local airflow circulation control in a selected range can be performed according to the diffusion state, so as to recover and harmlessly treat the risky gases, effectively avoiding the diffusion of harmful gases to the outside. At the same time, different from the overall airflow circulation method, it can effectively avoid the diffuse diffusion of harmful gases caused by the overall airflow circulation and fill the entire space, reducing the risk to internal staff, and avoiding the diffuse diffusion of harmful gases can also achieve non-stop maintenance, minimizing the reduction Reduce the impact of harmful gas leakage on the production line; specifically, in some production and experimental scenarios, due to the high toxicity of the gases generated or used in the process, the direct discharge of these toxic and harmful gases will cause safety impacts on the external environment organisms, so strict gas control is required. Usually, isolation measures are used to make the space closed to prevent harmful gases from entering the external natural ecosystem when they leak. When the gas leaks in the internal environment, it also needs to be handled in time to avoid harm to the relevant operators. In the existing technology, in order to ensure the gas safety inside the environment, the overall indoor gas circulation method is usually used to filter and process the harmful gases contained. However, the disadvantage of this is that When harmful gases diffuse, the indoor gas circulation method will cause the diffused harmful gases to further accelerate diffusion, and even diffuse and fill the entire room. This is obviously very dangerous to the operators in actual situations. Therefore, under normal circumstances, the stability of indoor airflow is the best state to reduce the risk of diffusion. The solution of this embodiment adopts the execution method of stable indoor airflow under normal conditions, and sets distributed gas monitoring equipment for real-time monitoring (which can be a variety of sensor devices such as laser sensors), and simulates the diffusion of gas through twin simulation. For example, when a leak occurs at point A, due to the stable state of indoor gas, the leaked gas will be under the action of pressure and gravity, downward and in all directions. Stable diffusion will enable corresponding gas monitoring records (including gas type concentration and flow direction, etc.) to be obtained by measuring multiple distribution points in the surrounding area such as a1, a2, a3, etc., and then these data can be mapped and fitted in the twin monitoring space. Because of the stability of the environment, the diffusion range of harmful gases (i.e., target gases) can be easily and accurately fitted, so as to select the corresponding processing circulation port to perform local airflow circulation tasks, so as to recover and treat harmful gases with minimized indoor airflow changes. At the same time, risk judgment and early warning are carried out based on the overlap between the range covered by the local airflow circulation and the area of ​​indoor staff, so as to achieve the purpose of harmful gas treatment with minimal impact.

[0023] As another preferred embodiment of the present invention, the steps of obtaining the position distribution of several gas processing circulation ports to generate multiple groups of gas processing flow ranges, performing cross-risk judgment based on personnel distribution information and target gas, generating risk warnings and providing feedback specifically include: Obtaining the position distribution of several gas processing circulation ports and mapping them in the twin monitoring space, assigning values ​​to the multiple gas processing circulation ports so that they can perform airflow state control, wherein the airflow state control includes airflow engulfment, airflow output, and device shutdown; Based on the twin monitoring space, multiple gas processing circulation ports are connected and blocked. If there is no structural partition between a pair of gas processing circulation ports, a circulation group is generated accordingly. Each circulation group corresponds to a flow range, and the flow range is used to characterize the concentrated flow area of ​​the gas flow when a pair of gas processing circulation ports in the circulation group are working. Acquire multiple groups of circulation groups covering the target gas diffusion area, determine the overlapping areas between the circulation ranges of the multiple circulation groups and the personnel distribution information representation area, and select the circulation group combination with the lowest overlapping area to establish a risk treatment plan; A risk warning is generated and outputted based on the overlapping area and the risk level of the target gas. The risk warning is used to characterize the risk gas type, risk coverage area and safety impact range.

[0024] In this embodiment, the steps of circulation treatment and risk warning are described in more detail, wherein the gas treatment circulation ports are distributedly arranged at the boundary range of the room, and are arranged as smaller ventilation ports. Therefore, when a pair of gas treatment circulation ports that can be directly connected on a straight line operate in the state of airflow engulfment and airflow output respectively, the airflow between the two will form an approximately columnar airflow space (a non-standard state, which will disturb the surrounding gas in a certain range within a certain range, that is, this columnar space is in an expansion state, which can be approximately regarded as a wind tunnel model). Therefore, after determining the diffusion range, multiple pairs of gas treatment circulation ports can be selected as a group to cover the diffusion range for harmful gas treatment. Due to the randomness of the combination, multiple groups of schemes can be generated at the same time (it should be noted that the multiple pairs of gas treatment circulation ports in each group here are selected based on the minimum angle standard of parallel or multi-point converging into one point, and the columnar airflow space will not be different in flow direction or cross before approaching the gas treatment circulation port), and the airflow coverage area of ​​multiple schemes and the distribution area of ​​the operators are cross-judged to determine the size and position of the overlapping area, and then a risk warning is generated to inform the existence of risks in time.

[0025] As another preferred embodiment of the present invention, the steps are also included: Obtaining the pipeline structure distribution in the monitoring area and the gas holding information corresponding to the pipeline, and synchronizing the information in the twin monitoring space; The concentration contours of the target gas are delineated by using multiple groups of the gas monitoring data, the leakage area is screened according to the concentration contours, and the pipelines are screened according to the gas type of the target gas to preliminarily locate the risk source range and risk pipeline objects.

[0026] In this embodiment, the introduction and synchronization process of production-related pipeline distribution information is supplemented. By synchronizing the information of pipeline distribution and gas in the pipeline in the twin monitoring space, when a leak occurs, the leak point can be quickly located based on the detected point information, concentration information and gas type (the positioning here refers to determining a smaller range interval and possible pipeline objects). Then, according to the range and height information of the leak point, higher fitting accuracy can be provided for subsequent diffusion simulation, and it can also facilitate relevant personnel to conduct rapid screening and maintenance after the early warning is issued.

[0027] As another preferred embodiment of the present invention, in the step of performing gas diffusion simulation based on the gas monitoring data updated at intervals to obtain the diffusion distribution of the gas, the gas diffusion process obeys the CFD fluid simulation model, specifically comprising the steps of: An environmental model of a CFD fluid simulation model is constructed based on the spatial structure of the twin monitoring space, wherein the structural edge of the environmental model is used to generate a simulation space boundary; Dividing a fitting grid in the twin monitoring space, and when a leak occurs, increasing the fitting grid density in the diffusion area; Based on the gas monitoring data, the boundary conditions of the environmental model are assigned, and the gas diffusion simulation is performed through the turbulence model. The boundary conditions are used to characterize the roughness of the edge of the environmental model structure and the wind speed profile of the model.

[0028] In this embodiment, because the solution of this embodiment is implemented based on a steady-state internal environment, the diffusion mode of the airflow is a basic fluid diffusion mode, so it can be conveniently and accurately predicted through a fluid diffusion simulation model. The fluid diffusion simulation model includes but is not limited to a Gaussian diffusion model, a CFD fluid simulation model, and a Lagrangian particle model. In this embodiment, the usage scenario is a complex indoor scene where various pipes and wall structures may exist, and there is a certain requirement for accuracy. Therefore, a CFD fluid simulation model is selected. The influencing factors in the simulation process include the distribution of obstacles in the space and information such as temperature and humidity gradients. Therefore, before simulation, quantitative processing is required to improve the simulation model.

[0029] like Figure 2 As shown, as another preferred embodiment of the present invention, it also includes the steps of: S51, performing interval grouping based on the spatial distribution of the gas sensing devices to obtain two sets of gas sensing devices; S52, initializing multiple gas sensing devices in the same gas sensing device set at a preset calibration time interval, and synchronizing the time axes of the multiple gas sensing devices; S53, controlling multiple gas sensing devices to perform a gas monitoring, and obtaining data feedback thereof, calculating the time interval of the data feedback and setting it as the delay constant of the current sensing device.

[0030] In this embodiment, an optimization step of the delay constant of the gas sensor device is added. During the use of the gas sensor device, the error of the timer will cause the error of the time node; and the change of the detection efficiency will cause the error of the change of the detection use time. These errors will eventually lead to a decrease in the accuracy of the simulation fitting, affecting the timeliness of the corresponding plan and the accuracy of the early warning. Therefore, it is necessary to calibrate the time and correct the detection time delay after a certain period of time. The reason why the sensor equipment is divided into two groups here is that when the correction optimization is performed, if a leak occurs, there will still be available sensor equipment to respond in time.

[0031] like Figure 3 As shown, the present invention also provides a gas detection analysis and early warning system, which comprises: The spatial modeling module 100 is used to obtain spatial scanning data of the monitoring area, clean the spatial scanning data, and establish a twin monitoring space according to a preset scale, where the scale is used to balance the amount of data with the available computing power. A monitoring synchronization module 200 is used to obtain gas monitoring data of multiple points through a plurality of gas sensing devices arranged in a distributed manner, and map the gas monitoring data in a twin monitoring space based on the point information, wherein the gas monitoring data is used to characterize the gas type, gas concentration and gas flow rate of the current point; A diffusion fitting module 300 is used to perform a gas diffusion simulation based on the gas monitoring data updated at intervals to obtain the diffusion distribution of the gas, wherein the diffusion distribution is used to characterize the diffusion area of ​​the target gas and the concentration state at different positions in the area before the next interval update; The early warning feedback module 400 is used to obtain the position distribution of several gas processing circulation ports to generate multiple groups of gas processing flow ranges, perform cross-risk judgment based on personnel distribution information and target gas, generate risk warnings and feedback.

[0032] As another preferred embodiment of the present invention, the early warning feedback module includes: A circulation mapping unit, used to obtain the position distribution of multiple gas processing circulation ports and map them in the twin monitoring space, assign values ​​to multiple gas processing circulation ports so that they can perform airflow state control, wherein the airflow state control includes airflow engulfment, airflow output, and device shutdown; A processing and evaluation unit is used to judge the connection occlusion of multiple gas processing circulation ports based on the twin monitoring space. If there is no structural partition between a pair of gas processing circulation ports, a circulation group is generated accordingly. Each of the circulation groups corresponds to a flow range, and the flow range is used to characterize the concentrated flow area of ​​the gas flow when a pair of gas processing circulation ports in the circulation group are working; A scheme optimization unit is used to obtain multiple groups of circulation groups covering the target gas diffusion area, and determine the overlapping area between the circulation ranges of multiple circulation groups and the personnel distribution information representation area, and select the circulation group combination with the lowest overlapping area to establish a risk treatment plan; The warning feedback unit is used to generate and output a risk warning based on the overlapping area and the risk level of the target gas. The risk warning is used to characterize the risk gas type, risk coverage area and safety impact range.

[0033] As another preferred embodiment of the present invention, it also includes a traceability and limit reduction module: A pipeline synchronization unit, used to obtain the pipeline structure distribution in the monitoring area and the gas holding information corresponding to the pipeline, and synchronize the information in the twin monitoring space; The pipeline reduction unit is used to define the concentration contour of the target gas through multiple groups of gas monitoring data, screen the leakage area according to the concentration contour, and screen the pipeline according to the gas type of the target gas to preliminarily locate the risk source range and risk pipeline object.

[0034] As another preferred embodiment of the present invention, in the diffusion fitting module, the gas diffusion process obeys the CFD fluid simulation model, which specifically includes: A model building unit, used for building an environmental model of a CFD fluid simulation model based on the spatial structure of the twin monitoring space, wherein the structural edge of the environmental model is used to generate a simulation space boundary; An accuracy limiting unit, used to divide the fitting grid in the twin monitoring space, and when a leak occurs, increase the fitting grid density of the diffusion area; The diffusion fitting unit is used to assign values ​​based on gas monitoring data, set the boundary conditions of the environmental model, and simulate gas diffusion through a turbulence model. The boundary conditions are used to characterize the roughness of the edge of the environmental model structure and the wind speed profile of the model.

[0035] As another preferred embodiment of the present invention, a delay optimization module is also included, specifically including: A grouping unit, used for performing interval grouping based on the spatial distribution of the gas sensing devices to obtain two sets of gas sensing devices; An initialization unit, used to initialize multiple gas sensing devices in the same gas sensing device set at a preset calibration time interval, and to synchronize and correct the time axes of the multiple gas sensing devices; The delay optimization unit is used to control multiple gas sensing devices to perform a gas monitoring and obtain their data feedback, calculate the time interval of the data feedback and set it as the delay constant of the current sensing device.

[0036] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the program can be stored in a non-volatile computer-readable storage medium. When the program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, storage, database or other media used in the embodiments provided in this application may include non-volatile and / or volatile memory. Non-volatile memory may include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM) or flash memory. Volatile memory may include random access memory (RAM) or external cache memory. As an illustration and not limitation, RAM is available in many forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).

[0037] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the disclosure in the specification and examples. This application is intended to cover any variations, uses or adaptations of the present disclosure, which follow the general principles of the present disclosure and include common knowledge or customary techniques in the art that are not disclosed in the present disclosure. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present disclosure are indicated by the claims.

[0038] It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A gas detection analysis and early warning method, characterized in that: Include: Acquire spatial scanning data of the monitoring area, clean the spatial scanning data, and establish a twin monitoring space by matching the preset scale, where the scale is used to balance the amount of data with the available computing power. The gas monitoring data of multiple points are obtained through a plurality of gas sensing devices arranged in a distributed manner, and the gas monitoring data are mapped in the twin monitoring space based on the point information. The gas monitoring data is used to characterize the gas type, gas concentration and gas flow rate of the current point; Performing a gas diffusion simulation based on the interval-updated gas monitoring data to obtain a gas diffusion distribution, wherein the diffusion distribution is used to characterize a diffusion area of ​​the target gas and a concentration state at different locations in the area before the next interval update; The location distribution of several gas processing circulation ports is obtained to generate multiple groups of gas processing flow ranges, and cross-risk judgments are made based on personnel distribution information and target gases to generate risk warnings and feedback.

2. A gas detection analysis and early warning method according to claim 1, characterized in that: The steps of obtaining the position distribution of several gas processing circulation ports to generate multiple groups of gas processing flow ranges, making cross-risk judgments based on personnel distribution information and target gases, and generating risk warnings and feedback specifically include: Obtaining the position distribution of several gas processing circulation ports and mapping them in the twin monitoring space, assigning values ​​to the multiple gas processing circulation ports so that they can perform airflow state control, wherein the airflow state control includes airflow engulfment, airflow output, and device shutdown; Based on the twin monitoring space, multiple gas processing circulation ports are connected and blocked. If there is no structural partition between a pair of gas processing circulation ports, a circulation group is generated accordingly. Each circulation group corresponds to a flow range, and the flow range is used to characterize the concentrated flow area of ​​the gas flow when a pair of gas processing circulation ports in the circulation group are working. Acquire multiple groups of circulation groups covering the target gas diffusion area, determine the overlapping areas between the circulation ranges of the multiple circulation groups and the personnel distribution information representation area, and select the circulation group combination with the lowest overlapping area to establish a risk treatment plan; A risk warning is generated and outputted based on the overlapping area and the risk level of the target gas. The risk warning is used to characterize the risk gas type, risk coverage area and safety impact range.

3. A gas detection analysis and early warning method according to claim 2, characterized in that: Also includes the steps: Obtaining the pipeline structure distribution in the monitoring area and the gas holding information corresponding to the pipeline, and synchronizing the information in the twin monitoring space; The concentration contours of the target gas are delineated by using multiple groups of the gas monitoring data, the leakage area is screened according to the concentration contours, and the pipelines are screened according to the gas type of the target gas to preliminarily locate the risk source range and risk pipeline objects.

4. A gas detection analysis and early warning method according to claim 1, characterized in that: In the step of performing gas diffusion simulation based on the gas monitoring data updated at intervals to obtain the diffusion distribution of the gas, the gas diffusion process complies with the CFD fluid simulation model, specifically comprising the steps of: An environmental model of a CFD fluid simulation model is constructed based on the spatial structure of the twin monitoring space, wherein the structural edge of the environmental model is used to generate a simulation space boundary; Dividing a fitting grid in the twin monitoring space, and when a leak occurs, increasing the fitting grid density in the diffusion area; Based on the gas monitoring data, the boundary conditions of the environmental model are assigned, and the gas diffusion simulation is performed through the turbulence model. The boundary conditions are used to characterize the roughness of the edge of the environmental model structure and the wind speed profile of the model.

5. A gas detection analysis and early warning method according to claim 1, characterized in that: Also includes the steps: Perform interval grouping based on the spatial distribution of the gas sensing devices to obtain two sets of gas sensing devices; Initialize multiple gas sensing devices in the same gas sensing device set at a preset calibration time interval, and synchronise the time axes of the multiple gas sensing devices; Control multiple gas sensing devices to perform a gas monitoring, obtain data feedback, calculate the time interval of the data feedback and set it as the delay constant of the current sensing device.

6. A gas detection analysis and early warning system, characterized in that: Include: The spatial modeling module is used to obtain the spatial scanning data of the monitoring area, clean the spatial scanning data, and establish a twin monitoring space by matching the preset scale, where the scale is used to balance the data volume with the available computing power. A monitoring synchronization module is used to obtain gas monitoring data of multiple points through a plurality of distributed gas sensing devices, and map the gas monitoring data in the twin monitoring space based on the point information, wherein the gas monitoring data is used to characterize the gas type, gas concentration and gas flow rate of the current point; A diffusion fitting module, used for performing gas diffusion simulation based on the gas monitoring data updated at intervals to obtain the diffusion distribution of the gas, wherein the diffusion distribution is used to characterize the diffusion area of ​​the target gas and the concentration state at different positions in the area before the next interval update; The early warning feedback module is used to obtain the location distribution of several gas processing circulation ports to generate multiple groups of gas processing flow ranges, make cross-risk judgments based on personnel distribution information and target gases, generate risk warnings and provide feedback.

7. A gas detection analysis and early warning system according to claim 6, characterized in that: The early warning feedback module includes: A circulation mapping unit, used to obtain the position distribution of multiple gas processing circulation ports and map them in the twin monitoring space, assign values ​​to multiple gas processing circulation ports so that they can perform airflow state control, wherein the airflow state control includes airflow engulfment, airflow output, and device shutdown; A processing and evaluation unit is used to judge the connection occlusion of multiple gas processing circulation ports based on the twin monitoring space. If there is no structural partition between a pair of gas processing circulation ports, a circulation group is generated accordingly. Each of the circulation groups corresponds to a flow range, and the flow range is used to characterize the concentrated flow area of ​​the gas flow when a pair of gas processing circulation ports in the circulation group are working; A scheme optimization unit is used to obtain multiple groups of circulation groups covering the target gas diffusion area, and determine the overlapping area between the circulation ranges of multiple circulation groups and the personnel distribution information representation area, and select the circulation group combination with the lowest overlapping area to establish a risk treatment plan; The warning feedback unit is used to generate and output a risk warning based on the overlapping area and the risk level of the target gas. The risk warning is used to characterize the risk gas type, risk coverage area and safety impact range.

8. A gas detection analysis and early warning system according to claim 7, characterized in that: It also includes traceability reduction module: A pipeline synchronization unit, used to obtain the pipeline structure distribution in the monitoring area and the gas holding information corresponding to the pipeline, and synchronize the information in the twin monitoring space; The pipeline reduction unit is used to define the concentration contour of the target gas through multiple groups of gas monitoring data, screen the leakage area according to the concentration contour, and screen the pipeline according to the gas type of the target gas to preliminarily locate the risk source range and risk pipeline object.

9. A gas detection analysis and early warning system according to claim 6, characterized in that: In the diffusion fitting module, the gas diffusion process obeys the CFD fluid simulation model, which specifically includes: A model building unit, used for building an environmental model of a CFD fluid simulation model based on the spatial structure of the twin monitoring space, wherein the structural edge of the environmental model is used to generate a simulation space boundary; An accuracy limiting unit, used to divide the fitting grid in the twin monitoring space, and when a leak occurs, increase the fitting grid density of the diffusion area; The diffusion fitting unit is used to assign values ​​based on gas monitoring data, set the boundary conditions of the environmental model, and simulate gas diffusion through a turbulence model. The boundary conditions are used to characterize the roughness of the edge of the environmental model structure and the wind speed profile of the model.

10. A gas detection analysis and early warning system according to claim 6, characterized in that: It also includes a delay optimization module, including: A grouping unit, used for performing interval grouping based on the spatial distribution of the gas sensing devices to obtain two sets of gas sensing devices; An initialization unit, used to initialize multiple gas sensing devices in the same gas sensing device set at a preset calibration time interval, and to synchronize and correct the time axes of the multiple gas sensing devices; The delay optimization unit is used to control multiple gas sensing devices to perform a gas monitoring and obtain their data feedback, calculate the time interval of the data feedback and set it as the delay constant of the current sensing device.

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