A dam safety automation monitoring equipment facility reliability evaluation method

Abstract

A dam safety automation monitoring equipment facility reliability evaluation method. The present application belongs to the technical field of dam safety automation monitoring, and aims to solve the problems that the existing equipment reliability evaluation relies on artificial experience, only focuses on a single device and does not consider the reference relationship of measuring points. The method determines the complete data transmission link of the target measuring point from the sensor to the information management system, splits it into multiple serial functional units, calculates the mean time between failures and reliability of each functional unit according to the historical running time and failure times, and obtains the total reliability of the link of the target measuring point itself; when the target measuring point references other measuring points, the total reliability of the link of the directly and indirectly referenced measuring points is calculated step by step, and the minimum value among them is taken as the final reliability of the target measuring point; then, according to the importance level of the measuring point and the corresponding threshold value, a maintenance warning is triggered, thereby realizing the full-link quantitative evaluation of the monitoring equipment facility, the reference-dependent risk identification and the hierarchical maintenance management.

Description

Technical Field

[0001] This invention relates to the field of automated monitoring technology for dam safety, specifically a method for evaluating the reliability of automated monitoring equipment and facilities for dam safety. Background Technology

[0002] An automated dam safety monitoring system typically includes sensors, a complete set of monitoring facilities, data acquisition devices, communication equipment, and an information management system. Monitoring data, after physical quantity sensing, signal acquisition and conversion, data transmission, aggregation, and processing, is used to analyze dam deformation, seepage, and other operational characteristics. As the number of monitoring points and equipment increases, the data transmission links and data dependencies between monitoring points become increasingly complex.

[0003] Existing technologies often determine whether monitoring equipment has malfunctioned by assessing its online status, data interruptions, abnormal measurements, or inconsistencies in data from adjacent monitoring points. Other technologies use mean time between failures (MTBF), failure rates, and reliability diagrams to analyze the reliability of general equipment or communication networks. However, in the operation and maintenance of dam safety monitoring systems, the evaluation of equipment and facility operating status still relies heavily on on-site inspections and manual experience, making it difficult to quantitatively compare the reliability of different equipment within the evaluation period using a unified standard.

[0004] Furthermore, existing evaluations typically focus on individual sensors, data acquisition devices, or communication equipment, failing to adequately reflect the overall reliability of the complete data transmission link from the sensor to the information management system. When any essential functional unit fails, even if other devices remain functioning normally, data from the target measurement point may still be unavailable or unusable. Therefore, single-device evaluations are prone to biasing the assessment of the overall reliability of the measurement point.

[0005] Data calculations at some dam monitoring points require data from other monitoring points, and these referenced points may in turn depend on upstream benchmark monitoring points, creating direct or indirect referencing relationships. Existing methods for identifying data anomalies or evaluating the reliability of single devices typically do not include the reliability of the upstream referenced monitoring point's link in the target monitoring point's evaluation. This may lead to an overestimation of the target monitoring point's reliability even when its own link is normal, but the reliability of the upstream referenced link is insufficient. Furthermore, different monitoring points have varying degrees of impact on dam safety monitoring conclusions, making it difficult to reflect the different maintenance priorities of each monitoring point using a uniform maintenance standard. Therefore, it is necessary to conduct a unified and quantitative reliability evaluation of the target monitoring point's own link and the links of its referenced monitoring points, and to implement tiered and graded maintenance early warning systems based on the importance of the monitoring points. Summary of the Invention

[0006] The purpose of this invention is to provide a method for evaluating the reliability of automated monitoring equipment and facilities for dam safety, so as to solve the problems mentioned in the background art.

[0007] To achieve the above objective, the present invention provides the following technical solution: The present invention provides a reliability evaluation method for dam safety automatic monitoring equipment and facilities, comprising: determining a target measurement point to be evaluated, and determining a complete data transmission link of the target measurement point from a sensor to an information management system; splitting the complete data transmission link into a plurality of sequentially connected functional units, wherein the plurality of functional units cover the functions of monitoring physical quantity perception, monitoring signal acquisition and conversion, monitoring signal transmission, and monitoring data storage and processing; respectively determining the reliability of each of the functional units within the current evaluation period based on the historical operation records of each functional unit, and determining the total reliability of the own link of the target measurement point according to the reliability of each functional unit; judging whether data of other measurement points is used for data acquisition or data calculation of the target measurement point; in the case that neither data acquisition nor data calculation of the target measurement point uses data of other measurement points, determining the total reliability of the own link as the final reliability of the target measurement point; in the case that data of other measurement points is used for data acquisition or data calculation of the target measurement point, determining the measurement points corresponding to the used data as reference measurement points, sequentially determining each reference measurement point having a direct reference relationship or an indirect reference relationship with the target measurement point along the reference dependency relationship between the measurement points, respectively determining the complete data transmission link of each reference measurement point from the corresponding sensor to the information management system, performing functional unit splitting and reliability calculation on the complete data transmission link of each reference measurement point to obtain the total link reliability of each reference measurement point, and determining the minimum value among the total reliability of the own link of the target measurement point and the total link reliability of each reference measurement point as the final reliability of the target measurement point; determining the importance level of the target measurement point according to the influence degree of the target measurement point on the dam safety monitoring conclusion, and comparing the final reliability with a maintenance warning threshold corresponding to the importance level to determine whether to trigger a maintenance warning for the target measurement point.

[0008] Further, the plurality of functional units at least include a sensor for sensing a monitored physical quantity, a complete set of monitoring facilities arranged in a matching manner with the sensor, a data acquisition device for acquiring and converting monitoring signals, a communication device for ensuring monitoring signal transmission, and an information management system for storing and processing monitoring data, wherein the sensor and the complete set of monitoring facilities respectively constitute corresponding functional units.

[0009] Further, the historical operation records include the total historical operation time of the functional unit within the historical statistical period , and the number of failures of the functional unit within the historical statistical period ; according to the total historical operation time and the number of failures Determine the first Historical mean time between failures for each functional unit ,in:

[0010] Furthermore, the reliability of each functional unit is determined using an exponential distribution model. Failure rate of each functional unit for:

[0011] No. The failure probability density function of each functional unit is:

[0012] No. Each functional unit within the time interval The cumulative failure rate within is:

[0013] No. The reliability of each functional unit during the current evaluation period is:

[0014] In the formula, For the first The cumulative normal operating time of each functional unit from the start time of the current evaluation cycle to the current evaluation time.

[0015] Furthermore, the complete data transmission link of the target measurement point is considered as a series system, and the reliability of each functional unit in the complete data transmission link is multiplied to obtain the total reliability of the target measurement point's own link, wherein:

[0016] In the formula, This refers to the number of functional units in the complete data transmission link of the target measurement point. For the first The reliability of each functional unit during the current evaluation period.

[0017] Furthermore, at the target measuring point, there exists In the case of a reference point that has a direct or indirect reference relationship with the target test point, the total reliability of the target test point's own link and the... The minimum value among the total reliability of the links of all referenced measurement points is determined as the final reliability of the target measurement point, where:

[0018] In the formula, The total reliability of the target measurement point's own link. For the first The overall reliability of the link at each reference measurement point .

[0019] Furthermore, based on the data from other measurement points used in the data acquisition or data calculation process of the target measurement point, reference measurement points that have a reference relationship with the target measurement point are identified. When the data acquisition or data calculation of the target measurement point directly uses the data from the first reference measurement point, the first reference measurement point is identified as the direct reference measurement point of the target measurement point. When the data acquisition or data calculation of the first reference measurement point further uses the data from the second reference measurement point, the second reference measurement point is identified as the indirect reference measurement point of the target measurement point. The reference hierarchy is determined level by level along the reference dependency relationship, and the total link reliability of the target measurement point, the direct reference measurement point, and the indirect reference measurement point is calculated respectively. When the indirect reference measurement point further uses the data from other upstream measurement points, the other upstream measurement points are determined level by level along the reference dependency relationship, and the total link reliability of the other upstream measurement points is calculated, until all upstream reference measurement points in the reference dependency relationship are determined.

[0020] Furthermore, based on the degree of influence of the target monitoring points on the dam safety monitoring conclusions, the importance level of the target monitoring points is determined as key monitoring points, general monitoring points, or general monitoring points; the key monitoring points are monitoring points that directly affect the dam safety monitoring conclusions; the general monitoring points are monitoring points that need to be combined with other monitoring points to form a monitoring point group for comprehensive evaluation; and the general monitoring points are monitoring points that do not directly affect the dam safety monitoring conclusions but are used to analyze the local operational behavior of the dam.

[0021] Furthermore, corresponding maintenance warning thresholds are set for target measurement points of different importance levels, including: setting the maintenance warning threshold for the key monitoring measurement point to 0.8, triggering a maintenance warning when the final reliability of the key monitoring measurement point is less than 0.8, and identifying the key monitoring measurement point as a priority processing object; setting the maintenance warning threshold for the general monitoring measurement point to 0.7, triggering a maintenance warning when the final reliability of the general monitoring measurement point is less than 0.7; and setting the maintenance warning threshold for the general measurement point to 0.6, triggering a maintenance warning when the final reliability of the general measurement point is less than 0.6.

[0022] Furthermore, the cumulative normal operating time corresponding to each functional unit is determined based on the operating records of each functional unit itself.

[0023] Furthermore, the target measuring point is a tension line measuring point, and the complete data transmission link of the tension line measuring point sequentially includes a tension line sensor, a complete set of tension line devices, a data acquisition module, a data acquisition device, a monitoring station, a management station, and a central information management system; the tension line sensor, the complete set of tension line devices, the data acquisition module, the data acquisition device, the monitoring station, the management station, and the central information management system each participate in the reliability calculation as corresponding functional units.

[0024] Furthermore, the target measuring point is a tension line measuring point used to monitor the horizontal displacement of the dam. The tension line measuring point directly references the inverted plumb line base point, which in turn references the deep bedrock reference point. Complete data transmission link determination, functional unit splitting, and total link reliability calculation are performed on the tension line measuring point, the inverted plumb line base point, and the deep bedrock reference point, respectively. The minimum value among the total link reliability of the tension line measuring point, the inverted plumb line base point, and the deep bedrock reference point is determined as the final reliability of the tension line measuring point.

[0025] Compared with the prior art, the beneficial effects of the present invention are: 1. By determining the historical mean time between failures based on the total historical operating time and number of failures of each functional unit, and using the exponential distribution model to calculate the reliability within the evaluation period, a quantitative evaluation of the operating status of equipment and facilities is achieved, reducing the subjective differences caused by relying solely on on-site inspections and human experience for judgment. 2. By determining the complete data transmission link from the sensor to the information management system at the target measurement point, the sensor, complete set of monitoring facilities, data acquisition device, communication equipment and information management system are divided into serial functional units, and the reliability of each functional unit is synthesized so that the evaluation results can reflect the overall reliability of the entire process of monitoring data perception, acquisition, transmission and processing. 3. By determining whether the data acquisition or data calculation of the target measurement point uses data from other measurement points, the directly referenced measurement points and indirectly referenced measurement points are determined step by step, and the total reliability of the link of each referenced measurement point is calculated respectively, so that the operating status of the upstream measurement point link can be included in the reliability evaluation of the downstream target measurement point; 4. By determining the final reliability as the minimum of the total reliability of the target measurement point's own link and the total reliability of the links of each reference measurement point, the evaluation result of the target measurement point is not higher than the reliability of any reference measurement point link it depends on, thereby reducing the situation where the reliability of the target measurement point is overestimated due to insufficient reliability of the upstream reference link. 5. By classifying the monitoring points into key monitoring points, general monitoring points, and general monitoring points according to their impact on the dam safety monitoring conclusions, and setting maintenance early warning thresholds for each, a hierarchical maintenance early warning system for monitoring points of different importance is achieved, which is conducive to determining the priority order of key monitoring points. Attached Figure Description

[0026] Figure 1 A flowchart illustrating a method for evaluating the reliability of automated monitoring equipment for dam safety, provided as an embodiment of the present invention.

[0027] Figure 2 This is a schematic diagram of a measurement point data transmission link provided in an embodiment of the present invention.

[0028] Figure 3 This is a schematic diagram of the reference relationship of test points in a reference chain provided in an embodiment of the present invention.

[0029] Figure 4 A flowchart of a differentiated maintenance strategy based on the importance and ultimate reliability of measurement points is provided for an embodiment of the present invention.

[0030] Figure 5 This is a schematic diagram illustrating maintenance early warning thresholds for measuring points of different importance levels, provided as an embodiment of the present invention. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] This invention provides a method for evaluating the reliability of automated monitoring equipment for dam safety. The method takes the measuring points in the dam safety monitoring system as the evaluation object, breaks down the complete data transmission link from the sensor to the information management system into multiple serial functional units, and calculates the reliability of each functional unit and the overall reliability of the link based on the historical operating records of each functional unit.

[0033] When data acquisition or calculation at a target measurement point uses data from other measurement points, the directly referenced and indirectly referenced measurement points are determined level by level along the dependency relationships between measurement points. The minimum of the target measurement point's own total link reliability and the total link reliability of all referenced measurement points is taken as the final reliability of the target measurement point. Based on the importance level of the target measurement point, the final reliability is compared with the corresponding maintenance warning threshold to determine whether a maintenance warning should be triggered.

[0034] Example 1 See Figure 1 This embodiment provides a method for evaluating the reliability of automated monitoring equipment for dam safety, including steps S1 to S6.

[0035] S1: Determine the complete data transmission link of the target measurement point. From multiple monitoring points in the dam safety monitoring system, target monitoring points that require reliability evaluation are identified, and the complete data transmission link from the target monitoring point to the corresponding sensor and the information management system is determined.

[0036] The target measurement point can be a measurement point whose monitoring results are directly obtained by the sensor, or a measurement point whose monitoring results are obtained after calculation using data from one or more other measurement points.

[0037] The complete data transmission link is the complete data transmission path from the generation of data from the corresponding sensor at the target measurement point, through monitoring signal acquisition, signal conversion, communication transmission, data aggregation and data processing, until it enters the information management system.

[0038] When determining the complete data transmission link of the target measuring point, the equipment and facilities involved in realizing the monitoring function of the target measuring point are determined based on the data transmission relationship between the sensors, complete monitoring facilities, data acquisition devices, communication equipment and information management system corresponding to the target measuring point.

[0039] S2: Decompose the complete data transmission link into serial functional units. The complete data transmission link determined in step S1 is divided into multiple functional units connected in series.

[0040] The functional unit includes at least: Sensors used to sense dam displacement, seepage pressure, seepage flow, stress and strain, or other physical quantities to be monitored; A complete set of monitoring facilities that are installed in conjunction with the sensor and used to form corresponding monitoring conditions; A data acquisition device for reading sensor output signals and acquiring and converting the output signals; Communication equipment used to ensure the transmission of monitoring data between field equipment, monitoring stations, management stations, and information management systems; And an information management system for storing, processing and managing monitoring data.

[0041] The sensors and the complete monitoring facilities are respectively used as corresponding functional units in the reliability calculation. For specific target measurement points, the acquisition module, acquisition device, monitoring station, management station, and central information management system can be determined as independent functional units based on the actual equipment composition in their complete data transmission link.

[0042] The aforementioned functional units are connected in series according to the actual sequence in which the monitoring data passes. If any functional unit necessary for achieving the target monitoring point fails, it will affect the normal generation, acquisition, transmission, or processing of the target monitoring point data. Therefore, the aforementioned functional units are treated as a series system for reliability evaluation.

[0043] S3: Calculate the reliability of each functional unit. Obtain the historical operation records of each functional unit.

[0044] For the For each functional unit, within the selected historical statistical period, the cumulative time that the functional unit is in operation is calculated to obtain the result. Total historical running time of each functional unit ; Count the number of times the functional unit failed within the historical statistical period to obtain the number of failures. Historical number of faults for each functional unit .

[0045] exist In the case of total historical running time Compared with historical failure count The ratio of the two values ​​determines the first one. Historical mean time between failures for each functional unit .

[0046] This embodiment uses an exponential distribution model to describe the failure time distribution of functional units.

[0047] Define the fault probability density function as:

[0048] in, The failure rate of the functional unit. This refers to the runtime of the functional unit.

[0049] Cumulative failure rate Indicates the functional unit within the time interval The total probability of an internal failure is calculated using the following formula:

[0050] Reliability of functional units This indicates that the functional unit is in time. The probability of no failure occurring is calculated using the following formula:

[0051] In failure rate Under constant conditions, failure rate The relationship between the historical mean time between failures (MTBF) and the mean time between failures (MTBF) is as follows:

[0052] The formula for calculating the historical mean time between failures (MTBF) is:

[0053] in, This refers to the total historical running time of the functional unit within the historical statistical period. This refers to the number of times the functional unit failed within the historical statistical period.

[0054] Substituting equation (4) into equation (3), we obtain the first... Reliability of each functional unit during the current evaluation period:

[0055] in, For the first Historical mean time between failures for each functional unit For the first The cumulative normal operating time of each functional unit from the start of the current evaluation cycle to the current evaluation time.

[0056] The historical statistical period and the current evaluation period are different time ranges. The historical statistical period is used to count the total historical operating time and the number of historical failures, and to determine the historical mean time between failures (MTBF); the current evaluation period is used to determine the cumulative uptime corresponding to the functional unit when performing reliability evaluation.

[0057] The cumulative uptime for each functional unit is determined based on its own operation records. The cumulative uptime for different functional units may be the same or different.

[0058] S4: Calculate the overall reliability of the target measurement point's internal link. See Figure 2 Assume the complete data transmission link of the target measurement point includes The reliability of each of the following functional units, connected in series, within the current evaluation period is as follows:

[0059] Multiplying the reliability of each functional unit, we obtain the total reliability of the target measurement point's link:

[0060] Data from the target measurement point can only enter the information management system normally when all necessary functional units in the complete data transmission link of the target measurement point are operating normally. If the reliability of any necessary functional unit decreases, the overall reliability of the target measurement point's own link will also decrease.

[0061] S5: Determine the final reliability of the target measuring point Based on whether data from other measuring points are used in the data acquisition or calculation process of the target measuring point, determine whether the target measuring point has reference measuring points.

[0062] When the data acquisition and calculation of the target measurement point do not use data from other measurement points, it is determined that the target measurement point does not reference any measurement points. Therefore, the total link reliability of the referenced measurement points is no longer calculated, and the total link reliability of the target measurement point itself is set. The final reliability of the target measurement point is determined. .

[0063] When the data acquisition or calculation of the target measuring point directly uses the data of the first measuring point, the first measuring point is determined as the direct reference measuring point of the target measuring point.

[0064] When the data acquisition or data calculation of the directly referenced measuring point further uses the data of the second measuring point, the second measuring point is determined as the indirect reference measuring point of the target measuring point.

[0065] Following the above method, the reference dependencies between the test points are checked step by step to determine whether each referenced test point further uses data from other upstream test points, until all directly referenced test points and indirectly referenced test points are identified.

[0066] For each directly referenced test point and each indirectly referenced test point, perform steps S2 to S4 respectively to obtain the total link reliability of each referenced test point.

[0067] See Figure 3 Let the overall reliability of the target measurement point's self-link be... The total reliability of the links for each referenced measurement point that has a direct or indirect reference relationship with the target measurement point is as follows:

[0068] To ensure that the final reliability of the target measurement point is no higher than the total reliability of any reference measurement point link it depends on, the minimum value among the above reliability values ​​is determined as the final reliability of the target measurement point:

[0069] By using the minimum value to determine the final reliability of the target measurement point, the evaluation result of the target measurement point can reflect the link with the lowest reliability among its own data transmission links and all upstream reference measurement point data transmission links.

[0070] S6: Determine maintenance early warning results based on the importance level of the measuring points. See Figure 4 and Figure 5 Based on the degree of influence of the target monitoring points on the dam safety monitoring conclusions, the target monitoring points are divided into key monitoring points, general monitoring points, and general monitoring points.

[0071] Key monitoring points are those that directly affect the conclusions of dam safety monitoring.

[0072] A typical monitoring point is a point that needs to be grouped with other monitoring points to form a monitoring point group, and whose data is comprehensively evaluated based on the data from multiple monitoring points in the monitoring point group.

[0073] Generally, measuring points are those that do not directly affect the conclusions of dam safety monitoring but are used to analyze the local operational behavior of the dam.

[0074] For key monitoring points, the maintenance early warning threshold is set to 0.8. When the final reliability of the key monitoring points meets the following requirements:

[0075] When this occurs, a maintenance warning is triggered, and the key monitoring point is identified as a priority for handling.

[0076] For general monitoring points, the maintenance early warning threshold is set to 0.7. When the final reliability of general monitoring points meets:

[0077] At that time, a maintenance warning is triggered.

[0078] For general measuring points, the maintenance warning threshold is set to 0.6. When the final reliability of a general measuring point meets the following requirements:

[0079] At that time, a maintenance warning is triggered.

[0080] By using the above-mentioned hierarchical and graded approach, the corresponding maintenance early warning thresholds are applied to the measuring points of different importance levels.

[0081] An optional embodiment is provided, which uses the tension wire measuring point on the dam crest of a hydropower station dam safety monitoring system as the target measuring point to illustrate the specific implementation process of the present invention. Contents not specifically described in this embodiment are the same as in Embodiment 1.

[0082] S1: Determine the complete data transmission link of the tension wire measuring points. The tension line measuring point on the dam crest is selected as the target measuring point, which is used to obtain the horizontal displacement monitoring data of the dam.

[0083] Determine the complete data transmission link from the tension line sensor to the central information management system at the tension line measurement point.

[0084] S2: Complete data transmission link for splitting the tension wire measurement points See Figure 2 The complete data transmission link of the tension wire measuring point is divided into the following functional units: Tension wire sensor, as unit 1; A complete set of tensioning wire assembly, as unit 2; The data acquisition module is designated as Unit 3. The data acquisition device is designated as Unit 4. The monitoring station is designated as Unit 5. Management station, designated as Unit 6; The central information management system is designated as Unit 7.

[0085] Tension line sensors are used to detect changes in the displacement of the tension line; a complete tension line device is used to establish the measurement conditions for the tension line; a data acquisition module is used to read the monitoring signals output by the tension line sensors; a data acquisition device is used to acquire and convert the monitoring signals; a monitoring station and a management station are used for the transmission and aggregation of monitoring data; and a central information management system is used for the storage and processing of monitoring data.

[0086] S3: Calculate the reliability of each functional unit. Based on the historical operation records of each functional unit in the complete data transmission link of the tension line measuring point, the historical total operation time and number of faults of each functional unit within the historical statistical period are statistically analyzed, and the historical average fault-free time of each functional unit is calculated according to formula (5).

[0087] Based on the historical total running time corresponding to the tension wire sensor and number of historical failures The calculation yields:

[0088] Based on the historical total operating time of the complete set of tension line equipment and number of historical failures The calculation yields:

[0089] Based on the historical total running time of the data acquisition module and number of historical failures The calculation yields:

[0090] Based on the historical total operating time corresponding to the data acquisition device and number of historical failures The calculation yields:

[0091] Based on the total historical operating time and the number of historical failures for each of the monitoring station, management station, and central information management system, the following calculations were performed:

[0092] In this embodiment, the cumulative normal operating time of each functional unit within the current evaluation period is as follows:

[0093] According to equation (6), the reliability of the tension wire sensor is:

[0094] The reliability of the complete tensioning wire assembly is:

[0095] The reliability of the data acquisition module is:

[0096] The reliability of the data acquisition device is:

[0097] The reliability levels of the monitoring station, management station, and central information management system are as follows:

[0098] The reliability values ​​for each of the above functional units are displayed with two decimal places. When calculating the overall reliability of the complete data transmission link, the unrounded reliability values ​​of each functional unit are multiplied, and the final calculation result is displayed with two decimal places.

[0099] S4: Calculate the overall reliability of the self-link at the tension wire measuring point. According to equation (7), the reliability of the seven cascaded functional units is multiplied together to obtain the total reliability of the self-link of the tension wire measuring point:

[0100] By multiplying the unrounded reliability values ​​of each functional unit, we obtain:

[0101] Therefore, the overall reliability of the complete data transmission link of the tension wire measuring point is 0.64.

[0102] S5: Determine the final reliability of the tension wire measuring points Based on the data calculation relationship of the tension line measuring points, determine whether data from other measuring points are used in the data calculation process of the tension line measuring points.

[0103] It was determined that the data calculation of the tension line measuring point used the data of the inverted plumb line base point. Therefore, the inverted plumb line base point was determined as the direct reference measuring point of the tension line measuring point.

[0104] Further, based on the data calculation relationship of the inverted plumb line base point, it is determined whether data from other measuring points are used in the data calculation process of the inverted plumb line base point.

[0105] It was determined that the data calculation of the inverted plumb line base point used the data of the deep bedrock reference point. Therefore, the deep bedrock reference point was determined as the indirect reference point of the tension line measuring point.

[0106] See Figure 3 The tension line measuring point, the inverted plumb line base point, and the deep bedrock reference point form a multi-level reference relationship. Among them, the inverted plumb line base point is a direct reference measuring point of the tension line measuring point, and the deep bedrock reference point is an indirect reference measuring point of the tension line measuring point.

[0107] Perform steps S2 to S4 on the inverted plumb line base point to calculate the overall reliability of the data transmission link at the inverted plumb line base point:

[0108] Performing steps S2 to S4 on the deep bedrock benchmark point, the overall reliability of the data transmission link for the deep bedrock benchmark point is calculated as follows:

[0109] According to equation (8), the minimum value among the total reliability of the tension wire measuring point itself, the total reliability of the inverted plumb line base point, and the total reliability of the deep bedrock base point is determined as the final reliability of the tension wire measuring point:

[0110] Substituting the corresponding values, we get:

[0111] Therefore, the final reliability of the tension wire measuring point is 0.62.

[0112] S6: Determine maintenance early warning results This tension line measuring point is used to monitor the horizontal displacement of the dam and has a direct impact on the dam safety monitoring conclusions. Therefore, this tension line measuring point is classified as a key monitoring point.

[0113] The maintenance early warning threshold for key monitoring points is 0.8. In this embodiment, the final reliability of the tension wire monitoring points is:

[0114] because:

[0115] Therefore, a maintenance warning is triggered for the tension wire measuring point, and the tension wire measuring point is identified as a priority for handling.

[0116] Those skilled in the art will recognize that the modules and method steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementations should not be considered beyond the scope of this invention.

[0117] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the devices, equipment, and modules described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0118] In addition, the functional modules in the various embodiments of the present invention can be integrated into one processing module, or each module can exist physically separately, or two or more modules can be integrated into one module.

[0119] Furthermore, it should be noted that the combination of the various technical features in this case is not limited to the combination methods described in the claims of this case or the combination methods described in the specific embodiments. All technical features described in this case can be freely combined or combined in any way, unless they contradict each other.

[0120] It should be noted that the above examples are merely specific embodiments of the present invention, and the present invention is obviously not limited to the above embodiments, with many similar variations. All modifications that can be directly derived or conceived by those skilled in the art from the content disclosed in this invention should fall within the protection scope of this invention.

[0121] The above are merely preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A method for evaluating the reliability of automated monitoring equipment for dam safety, characterized in that, comprising: determining a target measurement point to be evaluated, and determining a complete data transmission link of the target measurement point from a sensor to an information management system; splitting the complete data transmission link into a plurality of sequentially connected functional units, where the plurality of functional units cover the functions of monitored physical quantity sensing, monitoring signal acquisition and conversion, monitoring signal transmission, and monitoring data storage and processing; based on the historical operation records of each functional unit, respectively determining the reliability of each functional unit within the current evaluation cycle, and determining the total reliability of the own link of the target measurement point according to the reliability of each functional unit; judging whether data of other measurement points are used for data acquisition or data calculation of the target measurement point; in the case that neither the data acquisition nor the data calculation of the target measurement point uses data of other measurement points, determining the total reliability of the own link as the final reliability of the target measurement point; in the case that data of other measurement points are used for data acquisition or data calculation of the target measurement point, determining the measurement points corresponding to the used data as reference measurement points, sequentially determining each reference measurement point that has a direct reference relationship or an indirect reference relationship with the target measurement point along the reference dependency relationship between the measurement points, respectively determining the complete data transmission link of each reference measurement point from the corresponding sensor to the information management system, performing functional unit splitting and reliability calculation on the complete data transmission link of each reference measurement point to obtain the total link reliability of each reference measurement point, and determining the minimum value among the total reliability of the own link of the target measurement point and the total link reliability of each reference measurement point as the final reliability of the target measurement point; determining the importance level of the target measurement point according to the influence degree of the target measurement point on the dam safety monitoring conclusion, and comparing the final reliability with the maintenance warning threshold corresponding to the importance level to determine whether to trigger a maintenance warning for the target measurement point.

2. The reliability evaluation method for automated dam safety monitoring equipment and facilities according to claim 1, characterized in that, The plurality of functional units at least include a sensor for sensing a monitored physical quantity, a complete set of monitoring facilities arranged in a supporting manner with the sensor, a data acquisition device for acquiring and converting monitoring signals, a communication device for ensuring monitoring signal transmission, and an information management system for storing and processing monitoring data, wherein the sensor and the complete set of monitoring facilities respectively constitute corresponding functional units.

3. A reliability evaluation method for automated dam safety monitoring equipment and facilities according to claim 1 or 2, characterized in that, The historical operation records include the first Total historical running time of each functional unit within the historical statistical period and the The number of times each functional unit failed during the historical statistical period ; Based on the total historical running time and the number of failures Determine the first Historical mean time between failures for each functional unit , in, The calculation formula is as above.

4. The reliability evaluation method for automated dam safety monitoring equipment and facilities according to claim 3, characterized in that, The reliability of each functional unit is determined using an exponential distribution model. Failure rate of each functional unit for: No. The failure probability density function of each functional unit is: No. Each functional unit within the time interval The cumulative failure rate within is: No. The reliability of each functional unit during the current evaluation period is: In the formula, For the first The cumulative normal operating time of each functional unit from the start time of the current evaluation cycle to the current evaluation time.

5. A method for evaluating the reliability of automated monitoring equipment for dam safety according to any one of claims 1 to 4, characterized in that, regarding the complete data transmission link of the target measurement point as a series system, and multiplying the reliability of each functional unit in the complete data transmission link to obtain the total reliability of the own link of the target measurement point, wherein: In the formula, This refers to the number of functional units in the complete data transmission link of the target measurement point. For the first The reliability of each functional unit during the current evaluation period.

6. A method for evaluating the reliability of automated monitoring equipment for dam safety according to any one of claims 1 to 5, characterized in that, The target measuring point exists In the case of a reference point that has a direct or indirect reference relationship with the target test point, the total reliability of the target test point's own link and the... The minimum value among the total reliability of the links of all referenced measurement points is determined as the final reliability of the target measurement point, where: In the formula, The total reliability of the target measurement point's own link. For the first The overall reliability of the link at each reference measurement point .

7. The reliability evaluation method for automated dam safety monitoring equipment and facilities according to claim 6, characterized in that, determining reference measurement points that have a reference relationship with the target measurement point according to data of other measurement points used in the data acquisition process or data calculation process of the target measurement point; when the data of the first reference measurement point is directly used for data acquisition or data calculation of the target measurement point, determining the first reference measurement point as the direct reference measurement point of the target measurement point; when data of the second reference measurement point is further used for data acquisition or data calculation of the first reference measurement point, determining the second reference measurement point as the indirect reference measurement point of the target measurement point; sequentially determining the reference hierarchy along the reference dependency relationship, and respectively calculating the total link reliability of the target measurement point, the direct reference measurement point and the indirect reference measurement point; When the indirectly referenced measurement point further uses data from other upstream measurement points, the other upstream measurement points are determined step by step along the reference dependency relationship, and the total link reliability of the other upstream measurement points is calculated until all upstream referenced measurement points in the reference dependency relationship are determined.

8. A method for evaluating the reliability of automated monitoring equipment for dam safety according to any one of claims 1 to 7, characterized in that, Based on the degree of influence of the target monitoring points on the dam safety monitoring conclusions, the importance level of the target monitoring points is determined as key monitoring points, general monitoring points, or general monitoring points; The key monitoring points mentioned are those that directly affect the conclusions of dam safety monitoring; The general monitoring points are those that need to be combined with other monitoring points to form a monitoring point group for comprehensive evaluation; The general measuring points mentioned above are those that do not directly affect the conclusions of dam safety monitoring and are used to analyze the local operational behavior of the dam.

9. The reliability evaluation method for automated dam safety monitoring equipment and facilities according to claim 8, characterized in that, Set corresponding maintenance early warning thresholds for target measurement points of different importance levels, including: The maintenance warning threshold corresponding to the key monitoring point is set to 0.

8. When the final reliability of the key monitoring point is less than 0.8, a maintenance warning is triggered, and the key monitoring point is identified as a priority handling object. The maintenance warning threshold corresponding to the general monitoring point is set to 0.

7. When the final reliability of the general monitoring point is less than 0.7, a maintenance warning is triggered. The maintenance warning threshold corresponding to the general measuring point is set to 0.

6. When the final reliability of the general measuring point is less than 0.6, a maintenance warning is triggered.

10. A method for evaluating the reliability of automated monitoring equipment for dam safety according to claim 3 or 4, characterized in that, The cumulative normal operating time for each functional unit is determined based on the operating records of each functional unit itself.

11. The reliability evaluation method for automated dam safety monitoring equipment and facilities according to claim 2, characterized in that, The target measuring point is a tension line measuring point. The complete data transmission link of the tension line measuring point includes, in sequence, a tension line sensor, a complete set of tension line devices, a data acquisition module, a data acquisition device, a monitoring station, a management station, and a central information management system. The tension line sensor, the complete tension line device, the acquisition module, the acquisition device, the monitoring station, the management station, and the central information management system each serve as corresponding functional units to participate in reliability calculation. The monitoring station and the management station are used for monitoring data communication transmission and constitute a communication functional unit.

12. A method for evaluating the reliability of automated monitoring equipment for dam safety according to claim 6 or 7, characterized in that, The target measuring point is a tension line measuring point used to monitor the horizontal displacement of the dam. The tension line measuring point directly references the inverted plumb line base point, and the inverted plumb line base point further references the deep bedrock reference point. Complete data transmission link determination, functional unit decomposition, and total link reliability calculation are performed on the tension line measuring point, the inverted plumb line base point, and the deep bedrock reference point, respectively. The minimum value among the total link reliability of the tension line measuring point, the inverted plumb line base point, and the deep bedrock reference point is determined as the final reliability of the tension line measuring point.

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