Dust remover structure health monitoring system
By introducing a health monitoring system into the dust collector, the cross-sectional characteristic information and load change are obtained and analyzed in real time, the health degree is calculated and compared with the threshold, the problem of inefficiency of traditional monitoring methods is solved, and efficient and accurate health status monitoring and evaluation of the dust collector structure is achieved.
Patent Information
- Application Number
- CN202510263209.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-06
- Publication Date
- 2025-06-27
AI Technical Summary
Traditional dust collector health monitoring methods are inefficient and have poor real-time performance, which cannot accurately reflect the health status of the equipment, resulting in frequent equipment failures and affecting the operation efficiency and safety of the power plant.
It provides a dust collector structure health monitoring system, including an input module, a parameter setting module and a calculation module. By obtaining cross-sectional characteristic information, stress change and load change in real time, calculate health degree and compare it with the set threshold value to generate health monitoring results.
Real-time and accurate health status assessment of dust collector structure is realized, potential problems are quickly identified, fault risks are reduced, operational safety and reliability are improved, and resource allocation and maintenance efficiency are optimized.
Smart Images
Figure CN120217005A_ABST
Abstract
Description
Technical Field
[0001] The present disclosure relates to the technical field of dust collector structure health monitoring, and particularly to a dust collector structure health monitoring system. Background Art
[0002] In modern power production, as a key environmental protection device, the dust collector is responsible for controlling waste gas emissions and improving air quality, and has become an important link in protecting the ecological environment. However, traditional dust collector health monitoring methods have many deficiencies such as low efficiency, poor real-time performance, and inability to accurately reflect the health status of the equipment. These problems not only lead to frequent equipment failures, but may also cause more serious environmental and safety hazards, thereby affecting the overall operation efficiency and economic benefits of the power plant.
[0003] In recent years, health monitoring technologies based on finite element analysis have gradually received attention, and the application of advanced simulation software such as structural calculation software has provided a new perspective for the health monitoring of dust collector structures. However, existing dust collector health monitoring systems are still insufficient in data processing, parameter configuration, and health assessment, and cannot fully meet the complex requirements of practical applications. For example, many systems cannot process a large amount of data in real time and lack a flexible parameter adjustment mechanism, resulting in the accuracy and timeliness of health assessment being affected. Summary of the Invention
[0004] The present disclosure aims to at least solve one of the problems existing in the prior art, and provides a dust collector structure health monitoring system.
[0005] The present disclosure provides a dust collector structure health monitoring system, which includes:
[0006] An input module, configured to obtain cross-sectional characteristic information, stress change amount, load change amount, and position information of the to-be-monitored dust collector structure measured on-site according to a preset input mode;
[0007] A parameter setting module, configured to set a health threshold of the to-be-monitored dust collector structure;
[0008] A calculation module, configured to solve the health degree of the to-be-monitored dust collector structure according to the cross-sectional characteristic information, the stress change amount, the load change amount, and the position information; and compare the health degree with the health threshold to obtain a health monitoring result of the to-be-monitored dust collector structure.
[0009] Optionally, the calculation module, configured to solve the health degree of the to-be-monitored dust collector structure according to the cross-sectional characteristic information, the stress change amount, the load change amount, and the position information, includes:
[0010] The calculation module is configured to:
[0011] Solve the warning value of the dust collector structure to be monitored according to the cross-sectional property information;
[0012] Solve the health degree of the dust collector structure to be monitored according to the warning value, the stress change amount, the load change amount, and the position information.
[0013] Optionally, the calculation module is configured to solve the warning value of the dust collector structure to be monitored according to the cross-sectional property information, including:
[0014] The calculation module is configured to solve the warning value of the dust collector structure to be monitored according to the following formula:
[0015]
[0016] where i and j are the beam node number and the column node number respectively, represents the warning value of the (i, j)-th support column, λ represents the buckling load factor, Q represents the load value acting on the dust collector structure to be monitored, y represents the distance from the farthest point of the support column cross-section to the neutral axis, A ij represents the cross-sectional area of the (i, j)-th support column, I ij represents the moment of inertia of the (i, j)-th support column, N ij is the axial force value converted on the (i, j)-th support column and is expressed as G is the load value of a single dust collector device, n is the number of dust collector devices beside the (i, j)-th support column, M ij is the bending moment value converted on the (i, j)-th support column and is expressed as M ij = M + M c , M represents the maximum bending moment at the column end, M c is the increased bending moment considering the second-order effect and is expressed as M c = δM, δ is an intermediate variable and is expressed as P u represents the axial load, P c represents the critical load of the support column, C m is a coefficient and is expressed as M1 and M2 are the bending moments at both ends of the support column respectively.
[0017] Optionally, the calculation module is configured to solve the health degree of the dust collector structure to be monitored according to the warning value, the stress change amount, the load change amount, and the position information, including:
[0018] The calculation module is configured to solve the health degree of the dust collector structure to be monitored according to the following formula:
[0019]
[0020] where I′ ij represents the health degree of the (i, j)-th support column, Δσ represents the stress change measured on-site, and ΔQ represents the load change measured on-site.
[0021] Optionally, the dust collector structure to be monitored includes the middle column, the middle side column, and the corner column of the dust collector to be monitored;
[0022] The calculation module is used to solve the health degree of the dust collector structure to be monitored according to the cross-sectional characteristic information, the stress change, the load change, and the position information, including:
[0023] The calculation module is used to: solve the health degrees of the middle column, the middle side column, and the corner column respectively according to the cross-sectional characteristic information, the stress change, the load change, and the position information;
[0024] The calculation module is used to compare the health degree with the health degree threshold to obtain the health monitoring result of the dust collector structure to be monitored, including:
[0025] The calculation module is used to: compare the health degrees of the middle column, the middle side column, and the corner column with the corresponding health degree thresholds respectively to obtain the corresponding health monitoring results.
[0026] Optionally, the parameter setting module is used to set the health degree threshold of the dust collector structure to be monitored, including:
[0027] The parameter setting module is used to:
[0028] set the health degree thresholds of the middle column, the middle side column, and the corner column respectively, and the health degree threshold includes a health threshold, a sub-health threshold, and an unsafe threshold.
[0029] Optionally, the parameter setting module is further used to: receive the database connection information input by the user and connect to the corresponding target database according to the database connection information.
[0030] Optionally, the preset input mode includes reading data from a database, transmitting data using a network interface, and receiving user input data.
[0031] Optionally, the preset output mode includes an interface output mode and a database output mode.
[0032] Optionally, the output module is further used to: display the health monitoring result.
[0033] The dust collector structure health monitoring system provided by the present disclosure can be applied to the health monitoring of various steel structure supports of dust collectors, effectively solving the deficiencies of traditional monitoring methods. Compared with the prior art, it has the following beneficial effects:
[0034] 1. Real-time monitoring and evaluation: It can evaluate the health status of the dust collector structure in real time, efficiently and accurately, quickly identify potential problems, help users take maintenance measures in a timely manner, thus significantly reducing the failure risk of the dust collector, improving the operation safety and reliability of the dust collector, and ensuring the safe and stable operation of the power plant.
[0035] 2. Flexible data input and personalized settings: Users can select various data input modes according to specific needs and flexibly adjust the health threshold according to the actual situation of the dust collector structure to be monitored, thereby enhancing the adaptability of the dust collector structure health monitoring system and enabling it to better meet the monitoring needs of different operating environments and achieve targeted monitoring and management.
[0036] 3. Optimize resource allocation and maintenance efficiency: Through accurate health assessment, it can help users formulate scientific maintenance plans, rationally allocate maintenance resources, reduce maintenance costs, and improve the overall operation efficiency. This optimization not only extends the service life of the equipment but also enhances the economic benefits of the power plant. Brief Description of the Drawings
[0037] One or more embodiments are exemplarily illustrated by the pictures in the corresponding drawings. These exemplary illustrations do not limit the embodiments. Elements with the same reference numerals in the drawings represent similar elements. Unless otherwise stated, the drawings in the figures do not constitute a proportional limitation.
[0038] Figure 1 It is a schematic structural diagram of a dust collector structure health monitoring system provided by an embodiment of the present disclosure;
[0039] Figure 2 It is a schematic diagram of the input mode of the input module provided by another embodiment of the present disclosure;
[0040] Figure 3 It is a schematic diagram of the function of the parameter setting module provided by another embodiment of the present disclosure;
[0041] Figure 4 It is a schematic diagram of the function of the output module provided by another embodiment of the present disclosure. Detailed Embodiments
[0042] To make the objectives, technical solutions, and advantages of the embodiments of the present disclosure clearer, the following will elaborate on each embodiment of the present disclosure in conjunction with the accompanying drawings. However, those of ordinary skill in the art can understand that in each embodiment of the present disclosure, many technical details are provided to help readers better understand the present disclosure. However, even without these technical details and various changes and modifications based on the following embodiments, the technical solutions claimed in the present disclosure can still be implemented. The division of the following embodiments is for convenience of description and should not constitute any limitation to the specific implementation of the present disclosure. The various embodiments can be combined and cross-referenced with each other on the premise of no contradiction.
[0043] One embodiment of the present disclosure relates to a dust collector structure health monitoring system, as Figure 1 shown, including an input module 1, a parameter setting module 2, a calculation module 3, and an output module 4.
[0044] The input module 1 is configured to obtain the cross-sectional characteristic information of the dust collector structure to be monitored measured on-site, as well as the stress change amount (stressChanged), load change amount (loadChanged), and location information according to a preset input mode.
[0045] Specifically, in power plant production, the dust collector is a crucial device, and the steel structure support of the dust collector, as a support structure, its safety is directly related to the normal operation and safe production of the dust collector. Adopting reasonable monitoring and early warning methods is one of the important means to ensure the safe operation of the steel structure support of the dust collector. Therefore, the dust collector structure health monitoring system provided in this embodiment selects the steel structure support of the dust collector to be monitored as the health monitoring object. For the steel structure support of the dust collector to be monitored, fully considering the stability and bearing capacity of the steel structure support under large deformation, using the direct analysis method, according to the cross-sectional characteristics of the support columns, tie rods, and braces, select the corresponding cross-sectional characteristic information, extract and analyze the large deformation characteristics of the support, and these characteristics can intuitively describe the deformation degree and deformation trend of the component, so as to scientifically and reasonably solve the early warning value.
[0046] Combined with stress data and material level data, especially the material bin load data, according to the analysis results of the large deformation characteristics of the dust collector structure to be monitored, the health degree of components at different levels can be solved, analyze the co-variation characteristics between the material level and stress, quantitatively describe the linear or non-linear relationship between them, establish a health degree discrimination logic, and calculate the health degree of components at different levels through corresponding intelligent algorithms, so as to realize the real-time diagnosis of the health degree of the dust collector structure to be monitored, that is, the steel structure support of the dust collector to be monitored.
[0047] It should be noted that in the structural health monitoring of dust collectors, the health monitoring of the middle columns, side-middle columns, and corner columns in the steel structure support of dust collectors has important theoretical and practical significance. First of all, the stress characteristics and load-bearing capacities of the middle columns, side-middle columns, and corner columns are different. Among them, the middle column has the largest load-bearing capacity and is mainly responsible for bearing vertical loads, so its health status directly affects the safety of the entire structure. Although the side-middle column has a relatively strong load-bearing capacity, it is more affected by the external environment and needs to be evaluated separately to ensure the stability of the structure under dynamic loads. The corner column has a relatively small load-bearing capacity and faces complex loads from two directions, and changes in its health status may affect the stability of the overall structure. Therefore, the dust collector structure health monitoring system provided by this embodiment selects the middle column, side-middle column, and corner column as components at different levels of the dust collector structure to be monitored. By separately evaluating the health of these three types of columns, potential problems can be identified more accurately, early warnings can be issued in a timely manner, and the overall safety and reliability of the structure can be ensured. This hierarchical analysis method not only improves the accuracy of health monitoring but also provides a basis for implementing effective maintenance and reinforcement measures.
[0048] The input module 1, as the data input end of the dust collector structure health monitoring system, can support multiple data input methods by presetting various input modes. Exemplarily, the preset input modes include reading data from a database, transmitting data using a network interface, and receiving user input data.
[0049] When the preset input mode is to receive user input data, as Figure 2 shown, the input module 1 can receive the data or data files input by the user through the manual input method 5, enabling the user to easily import relevant information into the dust collector structure health monitoring system and enhancing the flexibility of user input data.
[0050] When the preset input mode is to read data from a database, as Figure 2 shown, the input module 1 can directly obtain the stress change amount, load change amount, and column position information of the dust collector structure to be monitored measured on-site from the database through the database import method 6, facilitating the analysis and calculation by the calculation module 3.
[0051] When the preset input mode is to transmit data using a network interface, the input module 1 can open the corresponding network interface according to the set network interface address and enter the waiting state for receiving data. Once the sender sends data through this network interface, as Figure 2 shown, the input module 1 will automatically receive the data through the file reading method 7 for the health degree calculation by the calculation module 3.
[0052] By presetting a variety of input modes, users can quickly update and adjust the monitoring data according to the actual situation, ensuring that the dust collector structure health monitoring system can timely obtain the latest status information of the dust collector structure to be monitored.
[0053] The parameter setting module 2 is used to set the health threshold of the dust collector structure to be monitored.
[0054] Specifically, the parameter setting module 2 is a key component of the dust collector structure health monitoring system. As Figure 3 shown, its functions include setting the health threshold 8, that is, used to set the health threshold of the dust collector structure to be monitored. Among them, the health threshold is used to define the health standard of the dust collector structure, which can be specifically divided into a health threshold, a sub-health threshold, and an unsafe threshold. The health threshold can adopt the default value 10, or it can also adopt the value set by the user through manual modification 11 according to the operating environment and usage conditions of the equipment to achieve a more accurate health assessment and enhance the personalization of health monitoring.
[0055] Especially, when the middle column, the side middle column, and the corner column are components at different levels of the dust collector structure to be monitored, that is, when the dust collector structure to be monitored includes the middle column, the side middle column, and the corner column of the dust collector to be monitored, as Figure 3 shown, the function of the parameter setting module 2 can also include setting the applicable range 9, and the applicable range can include the middle column 12, the side middle column 13, and the corner column 14.
[0056] Exemplarily, the parameter setting module is used to set the health threshold of the dust collector structure to be monitored, including: the parameter setting module is used to: respectively set the health thresholds of the middle column, the side middle column, and the corner column, and the health threshold includes a health threshold, a sub-health threshold, and an unsafe threshold.
[0057] That is to say, the parameter setting module can also set different health thresholds according to different applicable ranges. For example, the parameter setting module can respectively set different health thresholds, sub-health thresholds, and unsafe thresholds for the middle column 12, the side middle column 13, and the corner column 14 to achieve a more accurate health assessment and enhance the personalization of health monitoring.
[0058] It should be noted that the dust collector structure health monitoring system can also establish a data connection with the database to achieve data interaction. At this time, the parameter setting module is also used to: receive the database connection information input by the user and connect to the corresponding target database according to the database connection information.
[0059] Specifically, the database connection information may include the name of the database and the corresponding username, password, etc. To ensure data security and smooth access, when the parameter setting module connects to the corresponding database according to the database connection information, it can provide timely feedback on the connection status to verify whether the database connection information entered by the user is correct. For example, if the database connection information is correct, the parameter setting module can directly connect to the corresponding database and prompt the user that the connection is successful. If the database connection information is incorrect, the parameter setting module can issue a warning of database connection failure to prompt the user to modify the database connection information.
[0060] The calculation module 3 is used to solve the health degree of the dust collector structure to be monitored according to the cross-section characteristic information, stress change amount, load change amount, and position information; and compare the health degree with the health degree threshold to obtain the health monitoring result of the dust collector structure to be monitored.
[0061] Specifically, the calculation module 3 is mainly used to evaluate and calculate the overall health degree of the dust collector structure to be monitored in real time, and monitor and reflect the health status of the equipment in real time. This module can process the input data in a timely manner, quickly generate a health degree score, and help users quickly identify potential problems and hidden dangers, thereby improving the operation safety of the equipment.
[0062] When the calculation module 3 solves the health degree of the dust collector structure to be monitored, it considers the adverse effects of member stability. The main influencing factors include: (1) the bending, shear, and axial deformation of the member, and all deformations that affect the structural displacement, (2) the second-order effect (P-δ effect), (3) geometric defects, and (4) the stiffness degradation of the member due to inelastic deformation. The calculation module 3 uses the direct analysis method to reasonably consider the above main influencing factors, comprehensively and realistically simulate the mechanical properties of the steel structure support members in the dust collector structure to be monitored, and solve the health degree of the dust collector structure to be monitored according to the simulation situation.
[0063] Exemplarily, the calculation module is used to solve the health degree of the dust collector structure to be monitored according to the cross-section characteristic information, stress change amount, load change amount, and position information, including: the calculation module is used to: solve the warning value of the dust collector structure to be monitored according to the cross-section characteristic information; solve the health degree of the dust collector structure to be monitored according to the warning value, stress change amount, load change amount, and position information.
[0064] Specifically, for the steel structure support of the dust collector structure to be monitored, according to the cross-section characteristics of the support columns, tie rods, and braces, the cross-section characteristic information in this embodiment includes the height h of the support column ij , moment of inertia I ij and cross-sectional area A ij , the length L of the tie rod and brace ij , moment of inertia Iij and the cross-sectional area A ij , and the elastic modulus E of the material. Where i and j are the beam node number and column node number respectively.
[0065] Based on the above cross-sectional property information, the steel structure support in the dust collector structure to be monitored is discretized into several bar elements. Among them, the support columns, tie rods and braces are respectively divided into multiple elements, and the length of each element is equal. Here, it is assumed that the vertical columns are divided into m elements and the cross beams are divided into n elements.
[0066] After discretizing the steel structure support into several bar elements, determine the element coordinate system and take the axial direction of the bar as one of the local coordinate axes.
[0067] After that, construct the stiffness matrix.
[0068] For the support column element, its element stiffness matrix can be expressed in the local coordinate system as:
[0069]
[0070] where E is the elastic modulus of the support column element, A is the cross-sectional area of the support column element, I y and I z are the moments of inertia of the support column element about the y-axis and z-axis respectively, and L is the element length of the support column element. Similarly, by replacing the support column element with a tie rod element or a brace element respectively, the element stiffness matrix of the tie rod element or the brace element can be obtained according to the element stiffness matrix of the support column element.
[0071] After obtaining the element stiffness matrix, through the coordinate transformation matrix T, the element stiffness matrix in the local coordinate system can be transformed into the element stiffness matrix in the global coordinate system That is On this basis, by assembling the element stiffness matrices of each element in the global coordinate system according to the corresponding relationship of the node degrees of freedom, the global stiffness matrix K can be obtained.
[0072] After that, construct the geometric stiffness matrix.
[0073] For the support column element, its element geometric stiffness matrix can be expressed in the local coordinate system as:
[0074]
[0075] where N is the converted axial force value on the support column element, M y is the converted bending moment value about the y-axis of the support column element, M zis the converted bending moment value of the support column element about the z-axis, and L is the element length of the support column element. Similarly, by replacing the support column element with a tie rod element or a bracing element respectively, the element geometric stiffness matrix of the tie rod element or the bracing element can be obtained according to the element geometric stiffness matrix of the support column element.
[0076] After obtaining the element geometric stiffness matrix, through the coordinate transformation matrix T, the element geometric stiffness matrix in the local coordinate system can be transformed into the element geometric stiffness matrix in the global coordinate system, that is On this basis, by assembling the element geometric stiffness matrices of each element in the global coordinate system according to the corresponding relationship of the node degrees of freedom, the global geometric stiffness matrix K G .
[0077] The P-δ effect refers to the effect generated by the load (force) acting between the nodes of the deformed member. By using the second-order analysis amplification factor to correct the first-order analysis result, it can be used as an approximate solution of the exact method to obtain M c = δM. Among them, P u is the axial load, P c is the critical load of the support column, M1 and M2 are the bending moments at both ends of the support column respectively, M is the maximum bending moment at the support column end, and M c is the increased bending moment considering the second-order effect. On this basis, the bending moment value M ij of the (i, j)-th support column considering the second-order effect can be expressed as: M ij = M + M c .
[0078] The method of introducing a fictitious horizontal load is used to consider the initial imperfections, and a fictitious nominal load of 0.002αY i is applied at the top of the support column to consider the initial geometric imperfections. Among them, 0.002 corresponds to the perpendicularity error of 1 / 500 of the support column. α represents the weight. When designed according to the load and resistance factor method, α = 1.0, and when designed according to the allowable stress method, α = 1.6. Y i is the combination of gravity loads acting on the top of the support column.
[0079] Stiffness reduction is used to consider the reduction of member stiffness caused by inelasticity, such as the early stress of the member caused by residual stress during rolling and manufacturing, the elastoplastic behavior of the structure, and the uncertainty of strength and stiffness, etc. The members that play a role in the structural stability are subjected to stiffness reduction, and the reduced stiffness is 0.8EA and 0.8τ b EI, where EA represents the tensile and compressive stiffness, τ b represents the coefficient, and EI represents the bending stiffness.
[0080] Therefore, considering the stiffness reduction factor, multiplying the overall stiffness matrix K of each element by a reduction coefficient of 0.8, the stiffness matrix K after stiffness reduction can be obtained. u , that is, K u = 0.8K.
[0081] Based on the above content, establish the buckling equation (K u + λK G )u = 0, where λ is the buckling load factor and u is the nodal displacement vector. Let d(K u + λK G ) = 0, solve this eigenvalue equation, and the minimum eigenvalue λ can be obtained.
[0082] Exemplarily, the calculation module is used to solve the warning value of the dust collector structure to be monitored according to the cross-sectional characteristic information, including: the calculation module is used to solve the warning value of the dust collector structure to be monitored according to the following formula:
[0083]
[0084] where i and j are the beam node number and column node number respectively, represents the warning value of the (i, j)th support column, λ represents the buckling load factor, Q represents the load value acting on the dust collector structure to be monitored, y represents the distance from the farthest point of the support column cross-section to the neutral axis, A ij represents the cross-sectional area of the (i, j)th support column, I ij represents the moment of inertia of the (i, j)th support column, N ij is the axial force value converted on the (i, j)th support column and is expressed as G is the load value of a single dust collector device, n is the number of dust collector devices beside the (i, j)th support column, M ij is the bending moment value converted on the (i, j)th support column and is expressed as M ij = M + M c , M represents the maximum bending moment at the support column end, M c is the increased bending moment considering the second-order effect and is expressed as M c = δM, δ is an intermediate variable and is expressed as P u represents the axial load, P c represents the critical load of the support column, C m is a coefficient and is expressed as M1 and M2 are the bending moments at both ends of the support column respectively.
[0085] After obtaining the warning value After that, the calculation module can calculate the health degree of the (i, j)-th support column based on the actually measured stress change and load change on site, and this health degree can reasonably measure the safety of components in the structural system.
[0086] Exemplarily, the calculation module is used to calculate the health degree of the dust collector structure to be monitored according to the warning value, stress change, load change, and position information, including: the calculation module is used to calculate the health degree of the dust collector structure to be monitored according to the following formula:
[0087]
[0088] where I′ ij represents the health degree of the (i, j)-th support column, Δσ represents the actually measured stress change on site, and ΔQ represents the actually measured load change on site.
[0089] Specifically, in this embodiment, the dust collector structure to be monitored includes the middle column, side-middle column, and corner column of the dust collector to be monitored. That is, in this embodiment, the middle column, side-middle column, and corner column are selected as components at different levels of the dust collector structure to be monitored, and the health degrees of the middle column, side-middle column, and corner column are calculated respectively, and the calculated health degrees are compared with the corresponding health degree thresholds to obtain the corresponding health monitoring results, so as to evaluate the health degrees of the middle column, side-middle column, and corner column respectively and more accurately identify potential problems.
[0090] In this case, the calculation module is used to calculate the health degree of the dust collector structure to be monitored according to the cross-section characteristic information, stress change, load change, and position information, including: the calculation module is used to: calculate the health degrees of the middle column, side-middle column, and corner column respectively according to the cross-section characteristic information, stress change, load change, and position information.
[0091] The calculation module is used to compare the health degree with the health degree threshold to obtain the health monitoring result of the dust collector structure to be monitored, including: the calculation module is used to: compare the health degrees of the middle column, side-middle column, and corner column with the corresponding health degree thresholds respectively to obtain the corresponding health monitoring results.
[0092] Specifically, when calculating the health degree of the middle column, calculate Δσ / ΔQ based on the load change (ΔQ) and stress change (Δσ) of the middle column, and this ratio reflects the stress response ability of the middle column under the action of the load. Calculate the absolute deviation between the corresponding warning value obtained according to the warning value solving process provided in the above embodiment and the actual stress response ratio Δσ / ΔQ. The larger this absolute deviation is, the greater the gap between the actual performance of the middle column and the expected health state. Among them, 1 < i < max 梁 and 1 < j < max 柱 and max梁 and max 柱 represent the maximum values of beam node numbers and column node numbers respectively, and then divide the absolute deviation by the corresponding warning value to obtain the relative deviation, which can quantify the relative gap between the actual health status and the corresponding warning value and further obtain the health degree I1 of the middle column, that is:
[0093] The calculation formula of I1 compares the actual stress response ability of the middle column with the corresponding warning value of the deviation degree. If the actual stress response ratio Δσ / ΔQ is close to the corresponding warning value , the value of I1 will be close to 1, and if the deviation between the actual stress response ratio Δσ / ΔQ and the corresponding warning value is large, the value of I1 will be significantly reduced, indicating the existence of health hazards. Therefore, the health threshold of the middle column can be set as T 11 , the sub - health threshold of the middle column can be set as T 12 , the unsafe threshold of the middle column can be set as T 13 , where 1 > T 11 > T 12 ≥ T 13 > 0.
[0094] Judge the health degree of the middle column: Compare the health degree I1 of the middle column with the health threshold T 11 , sub - health threshold T 12 , and unsafe threshold T 13 of the middle column respectively. If the health degree I1 is lower than the unsafe threshold T 13 , it indicates that the health index of the middle column deviates significantly from the healthy state. This situation may mean that the load - bearing capacity of the middle column is insufficient or there is an abnormal stress level under the current load conditions. Therefore, the overall structure of the dust collector to be monitored is considered unhealthy and further inspection and possible repair are required immediately to ensure the safety of the structure. If the health degree I1 is higher than the health threshold T 11 , it indicates that the health state of the middle column is good and the actual stress response is within the acceptable range. At this time, it can be considered that the middle column can effectively bear its design load and the structure is in a safe state. If the health degree I1 is lower than the health threshold T 11 but higher than the sub - health threshold T 12 , it indicates that the health state of the middle column is relatively good and has not reached the level of threatening the structural safety. At this time, the middle column can be inspected accordingly and corresponding preventive measures can be taken according to the inspection results to avoid further deterioration of the health state of the middle column.
[0095] When calculating the health degree of the side middle column, the load change amount (ΔQ) and stress change amount (Δσ) of the side middle column obtained from actual measurement are used to calculate its health index Δσ / ΔQ, which helps to understand the performance of the side middle column under external loads. Similar to calculating the health degree of the middle column, the corresponding warning value obtained by solving according to the warning value solving process provided in the above embodiment Calculate the absolute deviation between it and the actual stress response ratio Δσ / ΔQ. The larger this absolute deviation is, the greater the gap between the actual performance of the side middle column and the expected health state, where 1 < i < max 梁 , 1 < j < max 柱 , max 梁 and max 柱 respectively represent the maximum values of the beam node numbers and column node numbers. Then, divide the above absolute deviation by the corresponding warning value to obtain the relative deviation, and further obtain the health degree I2 of the side middle column, that is:
[0096] The calculation formula of I2 compares the actual stress response ability of the side middle column with the corresponding warning value of the deviation degree. If the actual stress response ratio Δσ / ΔQ is close to the corresponding warning value , the value of I2 will be close to 1, and if the deviation between the actual stress response ratio Δσ / ΔQ and the corresponding warning value is large, the value of I2 will be significantly reduced, indicating the existence of health hazards. Therefore, the health threshold of the side middle column can be set as T 21 , the sub-health threshold of the middle column can be set as T 22 , the unsafe threshold of the middle column can be set as T 23 , where 1 > T 21 > T 22 ≥ T 23 > 0.
[0097] Judge the health degree of the side middle column: Compare the health degree I2 of the side middle column with the health threshold T 21 , sub-health threshold T 22 , and unsafe threshold T 23 of the side middle column respectively. If the health degree I2 is lower than the unsafe threshold T 23 , it indicates that there are potential hazards in the health condition of the side middle column, and the overall dust collector structure to be monitored is considered unhealthy and requires immediate further inspection and possible repair to ensure the safety of the structure. If the health degree I2 is higher than the health threshold T 21 , it indicates that the health state of the side middle column is good and the actual stress response is within the acceptable range. At this time, it can be considered that the side middle column can effectively bear its design load and the structure is in a safe state. If the health degree I2 is lower than the health threshold T 21But higher than the sub-healthy threshold T 22 , indicating that the health status of the side middle column is relatively good and has not reached the level of threatening the structural safety. At this time, the side middle column can be inspected accordingly, and corresponding preventive measures can be taken according to the inspection results to avoid further deterioration of the health status of the side middle column.
[0098] When calculating the health degree of the corner column, according to the load change amount (ΔQ) and stress change amount (Δσ) of the corner column, its health index Δσ / ΔQ is calculated. This ratio reflects the stress adaptation ability of the corner column under the loading condition. According to the warning value solving process provided by the above implementation method, the corresponding warning value Calculate the absolute deviation between the calculated value and the actual stress response ratio Δσ / ΔQ. The larger this absolute deviation is, the greater the gap between the actual performance of the corner column and the expected health status. Among them, 1 < i < max 梁 , 1 < j < max 柱 , max 梁 and max 柱 respectively represent the maximum values of the beam node numbers and column node numbers. After that, divide this absolute deviation by the corresponding warning value to obtain the relative deviation, and then obtain the health degree i3 of the corner column, that is:
[0099] The calculation formula of I3 compares the actual stress response ability of the corner column with the corresponding warning value of the deviation degree. If the actual stress response ratio Δσ / ΔQ is close to the corresponding warning value , the value of I3 will be close to 1, and if the deviation between the actual stress response ratio Δσ / ΔQ and the corresponding warning value is large, the value of I3 will be significantly reduced, indicating the existence of health hazards. Therefore, the health threshold of the corner column can be set as T 31 , the sub-healthy threshold of the corner column can be set as T 32 , the unsafe threshold of the corner column can be set as T 33 , where 1 > T 31 > T 32 ≥ T 33 > 0.
[0100] Judge the health degree of the corner column: Compare the health degree I3 of the corner column with the health threshold T 31 , sub-healthy threshold T 32 , and unsafe threshold T 33 of the corner column respectively. If the health degree I3 is lower than the unsafe threshold T 33, indicating that the corner column is in an unhealthy state, meaning that the key load-bearing structure fails to meet the design requirements, threatening the overall safety of the dust collector structure to be monitored and necessitating immediate further inspection and possible repair to ensure structural safety. If the health index I3 is higher than the health threshold T 31 , indicating that the corner column is in a healthy state, showing good load-bearing capacity and stability. If the health index I3 is lower than the health threshold T 31 but higher than the sub-healthy threshold T 32 , indicating that the health state of the corner column is relatively good and has not reached the level of threatening structural safety. At this time, the corner column can be inspected accordingly, and corresponding preventive measures can be taken based on the inspection results to prevent the health state of the corner column from evolving into an unhealthy state.
[0101] The output module 4 is used to output the health monitoring results according to the preset output mode.
[0102] Specifically, in combination with Figure 4 , the output module 4, as the data output end of the dust collector structure health monitoring system, can support multiple data output methods by presetting various output modes, so as to flexibly provide the health monitoring results, including the health index 15 obtained by the calculation module, to the user or the relevant database 16.
[0103] Exemplarily, the preset output modes include the interface output mode and the database output mode.
[0104] In the interface output mode, the dust collector structure health monitoring system can directly return the health monitoring results to the requester in a specific data format such as JSON format through the interface.
[0105] In the database output mode, the dust collector structure health monitoring system can directly store the health monitoring results in the specified database.
[0106] By presetting various output modes, users can select different output modes according to different situations, which is convenient for users to perform subsequent processing.
[0107] Exemplarily, the output module 4 can also be used to display the health monitoring results. Specifically, the dust collector structure health monitoring system can visually display the health monitoring results of the dust collector structure to be monitored in real time through a graphical interface, which is convenient for users to view and helps users quickly understand the health state of the dust collector structure to be monitored.
[0108] Specifically, if the dust collector structure health monitoring system detects abnormal data, such as a certain parameter significantly exceeding its value range, the abnormal data list can be displayed through the abnormal data display window to facilitate in-depth analysis by the user to find the cause of the data abnormality. If the dust collector structure health monitoring system does not detect abnormal data, the health monitoring results of this time can be displayed in real time through the health status interface.
[0109] The dust collector structure health monitoring system provided by the embodiments of the present disclosure can be applied to the health monitoring of various steel structure supports of dust collectors, effectively solving the deficiencies of traditional monitoring methods. Compared with the prior art, it has the following beneficial effects:
[0110] 1. Real-time monitoring and evaluation: The dust collector structure health monitoring system provided by the embodiments of the present disclosure can evaluate the health status of the dust collector structure in real time, efficiently, and accurately, quickly identify potential problems, help users take maintenance measures in a timely manner, thus significantly reducing the failure risk of the dust collector, improving the operation safety and reliability of the dust collector, ensuring the safe and stable operation of the power plant, as well as the sustainable development in terms of environmental protection and production.
[0111] 2. Flexible data input and personalized settings: Users can select various data input modes according to specific needs and flexibly adjust the health threshold according to the actual situation of the dust collector structure to be monitored, thereby enhancing the adaptability of the dust collector structure health monitoring system provided by the embodiments of the present disclosure, enabling it to better meet the monitoring needs of different operating environments, and achieving targeted monitoring and management.
[0112] 3. Optimize resource allocation and maintenance efficiency: Through accurate health assessment, it can help users formulate scientific maintenance plans, rationally allocate maintenance resources, reduce maintenance costs, and improve the overall operation efficiency. This optimization not only extends the service life of the equipment but also enhances the economic benefits of the power plant, thus better achieving a win-win situation between environmental protection and economic benefits and laying a solid foundation for achieving the goal of green power.
[0113] Those of ordinary skill in the art can understand that the above embodiments are specific implementation manners for implementing the present disclosure, and in practical applications, various changes can be made to them in form and details without departing from the spirit and scope of the present disclosure.
Claims
1. A dust collector structural health monitoring system, characterized in that: The dust collector structural health monitoring system includes: An input module is used to obtain the cross-sectional characteristic information of the dust collector structure to be monitored and the stress change, load change, and position information measured on site according to a preset input mode; A parameter setting module, used to set a health threshold of the dust collector structure to be monitored; A calculation module, for solving the health of the dust collector structure to be monitored according to the cross-sectional characteristic information, the stress variation, the load variation, and the position information; and comparing the health with the health threshold to obtain a health monitoring result of the dust collector structure to be monitored; The output module is used to output the health monitoring result according to a preset output mode.
2. The dust collector structural health monitoring system according to claim 1, characterized in that: The calculation module is used to solve the health of the dust collector structure to be monitored according to the cross-sectional characteristic information, the stress change, the load change, and the position information, including: The computing module is used for: Determining the warning value of the dust collector structure to be monitored according to the cross-sectional characteristic information; The health of the dust collector structure to be monitored is solved based on the warning value, the stress change, the load change, and the position information.
3. The dust collector structural health monitoring system according to claim 2, characterized in that: The calculation module is used to solve the warning value of the dust collector structure to be monitored according to the cross-sectional characteristic information, including: The calculation module is used to solve the warning value of the dust collector structure to be monitored according to the following formula: Among them, i and j are the beam node number and column node number respectively. represents the warning value of the (i, j)th support column, λ represents the buckling load factor, Q represents the load value of the dust collector structure to be monitored, y represents the distance from the farthest point of the support column section to the neutral axis, and A ij represents the cross-sectional area of the (i, j)th support column, I ij represents the moment of inertia of the (i, j)th support column, N ij is the converted axial force value on the (i, j)th bracket column and is expressed as G is the load value of a single dust collector, n is the number of dust collectors next to the (i, j)th support column, M ij is the converted bending moment value on the (i, j)th support column and is expressed as M ij =M+M c , M represents the maximum bending moment at the support end, M c The increased bending moment considering the second-order effect is expressed as M c =δM, δ is an intermediate variable and is expressed as P u Indicates the axial load, P c represents the critical load of the support column, C m is the coefficient and is expressed as M1 and M2 are the bending moments at both ends of the support column.
4. The dust collector structural health monitoring system according to claim 3, characterized in that: The calculation module is used to solve the health of the dust collector structure to be monitored according to the warning value, the stress change, the load change, and the position information, including: The calculation module is used to solve the health of the dust collector structure to be monitored according to the following formula: Among them, I′ ij represents the health of the (i, j)th support column, Δσ represents the stress change measured on site, and ΔQ represents the load change measured on site.
5. The dust collector structural health monitoring system according to any one of claims 1 to 4, characterized in that: The dust collector structure to be monitored includes a center column, a side center column, and a corner column of the dust collector to be monitored; The calculation module is used to solve the health of the dust collector structure to be monitored according to the cross-sectional characteristic information, the stress change, the load change, and the position information, including: The calculation module is used to respectively solve the health of the center column, the side center column, and the corner column according to the cross-sectional characteristic information, the stress variation, the load variation, and the position information; The calculation module is used to compare the health level with the health level threshold to obtain a health monitoring result of the dust collector structure to be monitored, including: The calculation module is used to compare the health of the center column, the side center column, and the corner column with the corresponding health thresholds to obtain corresponding health monitoring results.
6. The dust collector structural health monitoring system according to claim 5, characterized in that: The parameter setting module is used to set the health threshold of the dust collector structure to be monitored, including: The parameter setting module is used to: The health thresholds of the center column, the side center column, and the corner column are set respectively, and the health thresholds include a healthy threshold, a sub-healthy threshold, and an unsafe threshold.
7. The dust collector structural health monitoring system according to any one of claims 1 to 4, characterized in that: The parameter setting module is further used to: receive database connection information input by a user, and connect to a corresponding target database according to the database connection information.
8. The dust collector structural health monitoring system according to any one of claims 1 to 4, characterized in that: The preset input mode includes reading data from a database, transmitting data using a network interface, and receiving user input data.
9. The dust collector structural health monitoring system according to any one of claims 1 to 4, characterized in that: The preset output modes include an interface output mode and a database output mode.
10. The dust collector structural health monitoring system according to any one of claims 1 to 4, characterized in that: The output module is also used to display the health monitoring results.