Load test method suitable for hydropower station bridge crane

Abstract

The invention relates to the field of safety detection, and discloses a load test method suitable for a hydropower station bridge crane, and the method comprises the steps: respectively obtaining first bridge deformation data and second bridge deformation data under a static load and a dynamic load, carrying out the processing and analysis of the first bridge deformation data and the second bridge deformation data, and obtaining a bridge deformation index; acquiring a first operation parameter and a second operation parameter of the hydropower station bridge crane under the static load and the dynamic load, analyzing and processing the first operation parameter and the second operation parameter to obtain an operation safety index, and comparing the bridge deformation index and the operation safety index with respective preset thresholds; if at least one item exceeds the preset threshold value, a first potential risk coefficient is obtained through analysis, whether potential danger exists in the hydropower station bridge crane or not is judged according to the first potential risk coefficient, a secondary evaluation coefficient is obtained after secondary evaluation is conducted, and whether an early warning is given or not is judged according to the comparison result of the secondary evaluation coefficient and a preset reference value.

Description

Technical Field

[0001] The present invention relates to the field of safety detection, and in particular to a load test method suitable for a bridge crane of a hydropower station. Background Art

[0002] Hydropower station bridge cranes, also known as bridge cranes, are heavy-duty lifting equipment designed specifically for hydropower stations. They are an essential component of hydropower station construction and operation. They are primarily used for the installation, maintenance, and overhaul of large equipment, particularly core equipment like turbines and generators.

[0003] Therefore, hydropower station bridge cranes must undergo safety tests before being put into use to ensure that they meet safety standards. Existing hydropower station bridge cranes generally undergo static and dynamic load tests. During the load test, various sensors or monitoring equipment are usually used to detect the key parameters of the hydropower station bridge crane. Once the preset threshold is exceeded, an alarm is issued to achieve the purpose of bridge crane performance evaluation. However, the usage scenarios and work of different hydropower station bridge cranes are different. Therefore, there may be cases where the preset threshold is exceeded but the crane is actually in a safe state. Frequent alarms will prevent the detection from proceeding smoothly, dragging down the overall detection process. Summary of the Invention

[0004] The purpose of the present invention is to provide a load test method suitable for a hydropower station bridge crane to solve the above technical problems.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] A load test method applicable to a hydropower station bridge crane, comprising:

[0007] S1. Apply a load to the hydropower station bridge crane through the load application module and adjust the size of the applied load as needed;

[0008] S2. Delineating a plurality of deformation detection points on the hydropower station bridge crane, and setting a fixed detection point on a side away from the hydropower station bridge crane to obtain first deformation data and second deformation data of the bridge frame under static load and dynamic load, respectively, and obtaining a bridge frame deformation index after processing and analyzing the first deformation data and the second deformation data;

[0009] S3. Obtaining, by means of a detection device, first and second operating parameters of the hydropower station bridge crane under static and dynamic loads, and analyzing and processing the first and second operating parameters to obtain an operating safety index;

[0010] S4. Compare the bridge deformation index and the operation safety index with their respective preset thresholds. If at least one of them exceeds the preset threshold, obtain a first potential risk coefficient based on the bridge deformation index and the operation safety index. Determine whether the hydropower station bridge crane is potentially dangerous based on the first potential risk coefficient. If it is preliminarily determined that the hydropower station bridge crane is potentially dangerous, proceed to S5. Otherwise, determine that the hydropower station bridge crane is safe.

[0011] S5. Perform a secondary evaluation of the state of the hydropower station bridge crane based on the number of times the bridge deformation index or the operation safety index exceeds the preset threshold in a unit time, and the magnitude of the change exceeding the preset threshold, to obtain a secondary evaluation coefficient;

[0012] S6. Verify whether the judgment result in S4 is true based on the comparison result of the secondary evaluation coefficient and the preset reference value. If true, execute S7; otherwise, generate an adjustment instruction and adjust the preset threshold in S4 according to the predetermined adjustment strategy based on the secondary evaluation coefficient;

[0013] S7. Issue early warning alarms to bridge cranes at hydropower stations that are judged to be potentially dangerous.

[0014] In a further embodiment, the bridge deformation index pass:

[0015] Obtain the first deformation coefficient of the bridge under different applied loads , the second deformation coefficient of the bridge Then, substitute into the formula Calculated;

[0016] In the formula is the judgment function, if or If is 0, The value is 1, otherwise, , For the The weight coefficient corresponding to the applied load, is the type of applied load, 、 is the reference value;

[0017] Among them, the first deformation coefficient and the second deformation coefficient are both expressed by the formula Processed;

[0018] Where, is the number of deformation monitoring points, is the proportional coefficient corresponding to the detection value of each deformation detection point, For the The deformation value detected by the deformation detection point, is the deformation value detected at the fixed detection point, is the proportional coefficient.

[0019] In a further embodiment, the operation safety index pass:

[0020] Obtain the first operating coefficient of the hydropower station bridge crane under different applied loads , Second operating factor under dynamic load Then, substitute into the formula Calculated;

[0021] Where, 、 is the preset coefficient, The first The curve of the first operating coefficient of the applied load changing with time, The first The change curve of the second operating coefficient of the applied load over time, 、 is the reference curve, For the detection period, 、 is the reference coefficient.

[0022] In a further embodiment, the first potential risk factor :

[0023] By formula Calculated;

[0024] Where, is the bridge deformation index, is the operational safety index, 、 is the weight factor.

[0025] In a further embodiment, the secondary evaluation coefficient :

[0026] By formula Calculated;

[0027] Where, For the The curve of the operational safety index changing with time when a load is applied is shown in Figure 1. For the The curve of the bridge deformation index changing with time when the load is applied. 、 is the influence coefficient, For the A standard curve of the operating safety index changing with time when a load is applied. For the A standard curve of the bridge deformation index changing with time when a load is applied. 、 They are Below and The number of areas enclosed above, Below and The number of areas enclosed above.

[0028] In a further solution, the working process of S4 is as follows:

[0029] S41, will run the safety index , bridge deformation index Respectively with their respective preset thresholds 、 Compare;

[0030] S42, if satisfied or If at least one of the following is true, then the process goes to S43; otherwise, it is determined that the hydropower station bridge crane is safe;

[0031] S43, the calculated first potential risk coefficient and potential risk warning values Make comparisons;

[0032] S44, if , it is preliminarily judged that the hydropower station bridge crane has potential danger and enters S5. , then it is judged that the hydropower station bridge crane is safe.

[0033] In a further embodiment, the working process of S5 is as follows:

[0034] S51, the secondary evaluation coefficient With preset reference value Compare;

[0035] S52, if , then the judgment result in S3 is true, and step S6 is executed; if , then the judgment result in S3 is false, and step S53 is executed;

[0036] S53, if S42 and , then 、 All adjustments are made according to the predetermined adjustment strategy;

[0037] If only , then Make adjustments according to the predetermined adjustment strategy;

[0038] If only , then Make adjustments according to the predetermined adjustment strategy.

[0039] In a further solution, the process of establishing the adjustment strategy is as follows:

[0040] Will Difference from setting For comparison, if , then or according to times to expand;

[0041] like , then the preset threshold is set according to times to expand, where is a fixed coefficient, and >1; 、 is the preset scale factor.

[0042] Beneficial effects of the present invention:

[0043] (1) By comparing the preset thresholds of the bridge deformation index and the operation safety index, it is judged that the hydropower station bridge crane is safe if there is no potential problem in any of the structure and electrical parts of the hydropower station bridge crane. As long as one of them exceeds the preset threshold, it means that the hydropower station bridge crane may have safety hazards. Therefore, the first potential risk coefficient is obtained by processing and analyzing the bridge deformation index and the operation safety index. The first potential risk coefficient is used to judge whether the hydropower station bridge crane has potential danger. This process is a verification step of the previous process. If the first potential risk coefficient is jointly established with the bridge deformation index and the operation safety index, the prediction If the model judges that the hydropower station bridge crane is safe, it means that the hydropower station bridge crane is safe. Otherwise, it is preliminarily judged that the hydropower station bridge crane has potential risks. Then, the status of the hydropower station bridge crane is secondary evaluated to obtain a secondary evaluation coefficient. According to the comparison result of the secondary evaluation coefficient and the preset reference value, the judgment result in S4 is re-checked to be true or false. If it is false, there is no need to falsely trigger the warning. If it is true, it means that the hydropower station bridge crane does have potential risks. When it is false, an adjustment instruction is synchronously generated, and the preset threshold is adjusted according to the predetermined adjustment strategy based on the secondary evaluation coefficient, so that the preset threshold is closer to the actual status, and the judgment accuracy is improved and then tested again;

[0044] (2) Through the above multiple verification process, it is ensured that the probability of potential risks in the hydropower station bridge crane is high when the safety warning is issued, and false alarms are prevented. At the same time, the two verification processes can reduce the system's computing power, improve processing efficiency and detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] The present invention will be further described below with reference to the accompanying drawings.

[0046] Figure 1 A diagram showing the steps of the method of the present invention. DETAILED DESCRIPTION

[0047] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0048] See also Figure 1 As shown, the present invention is a load test method applicable to a bridge crane of a hydropower station, comprising:

[0049] S1. Apply a load to the hydropower station bridge crane through the load application module and adjust the size of the applied load as needed;

[0050] S2. Delineating a plurality of deformation detection points on the hydropower station bridge crane, and setting a fixed detection point on a side away from the hydropower station bridge crane to obtain first deformation data and second deformation data of the bridge frame under static load and dynamic load, respectively, and obtaining a bridge frame deformation index after processing and analyzing the first deformation data and the second deformation data;

[0051] S3. Obtaining, by means of a detection device, first and second operating parameters of the hydropower station bridge crane under static and dynamic loads, and analyzing and processing the first and second operating parameters to obtain an operating safety index;

[0052] S4. Compare the bridge deformation index and the operation safety index with their respective preset thresholds. If at least one of them exceeds the preset threshold, obtain a first potential risk coefficient based on the bridge deformation index and the operation safety index. Determine whether the hydropower station bridge crane is potentially dangerous based on the first potential risk coefficient. If it is preliminarily determined that the hydropower station bridge crane is potentially dangerous, proceed to S5. Otherwise, determine that the hydropower station bridge crane is safe.

[0053] S5. Perform a secondary evaluation of the state of the hydropower station bridge crane based on the number of times the bridge deformation index or the operation safety index exceeds the preset threshold in a unit time, and the magnitude of the change exceeding the preset threshold, to obtain a secondary evaluation coefficient;

[0054] S6. Verify whether the judgment result in S4 is true based on the comparison result of the secondary evaluation coefficient and the preset reference value. If true, execute S7; otherwise, generate an adjustment instruction and adjust the preset threshold in S4 according to the predetermined adjustment strategy based on the secondary evaluation coefficient;

[0055] S7. Issue early warning alarms to bridge cranes at hydropower stations that are judged to be potentially dangerous.

[0056] After the hydropower station bridge crane is installed, the present invention first applies different types of loads to the hydropower station bridge crane through the load application module, and realizes detection under both static load and dynamic load states, which can effectively improve the safety assessment accuracy of the hydropower station bridge crane; at the same time, in order to prevent the problem of frequent triggering of alarms due to preset threshold setting problems in the actual detection process, which causes the detection process to be temporarily stopped and interferes with the detection order, the bridge deformation index and the operation safety index are first compared with their respective preset thresholds to determine that there are no potential problems in any of the structure and electrical parts of the hydropower station bridge crane. The safety of the hydropower station bridge crane is determined. As long as one of them exceeds the preset threshold, it means that the hydropower station bridge crane may have safety hazards. Therefore, the first potential risk coefficient is obtained by processing and analyzing the bridge deformation index and the operation safety index. The first potential risk coefficient is used to determine whether the hydropower station bridge crane has potential danger. This process is a verification step of the previous process. If the first If the prediction model jointly established by the potential risk coefficient, the bridge deformation index and the operation safety index judges that the hydropower station bridge crane is safe, it means that the hydropower station bridge crane is safe. Otherwise, it is preliminarily judged that the hydropower station bridge crane has potential risks, and then the status of the hydropower station bridge crane is secondary evaluated to obtain the secondary evaluation coefficient. The judgment result in S4 is verified again based on the comparison result of the secondary evaluation coefficient and the preset reference value to be true or false. If it is false, there is no need to falsely trigger the warning. If it is true, it means that the hydropower station bridge crane does have potential risks. When it is false, an adjustment instruction is generated synchronously, and the preset threshold is adjusted according to the predetermined adjustment strategy based on the secondary evaluation coefficient, so that the preset threshold is closer to the actual state, and the judgment accuracy is improved before testing again. Through the above-mentioned multiple verification process, it is ensured that the probability of the hydropower station bridge crane having potential risks is high when the safety warning is issued, and false alarms are prevented. At the same time, the two verification processes can reduce the system's computing power, improve processing efficiency and detection accuracy.

[0057] In a further embodiment, the bridge deformation index pass:

[0058] Obtain the first deformation coefficient of the bridge under different applied loads , the second deformation coefficient of the bridge Then, substitute into the formula Calculated;

[0059] In the formula is the judgment function, if or If is 0, The value is 1, otherwise, , For the The weight coefficient corresponding to the applied load is selected based on historical data and empirical data. is the type of applied load, 、 It is a reference value, formulated based on historical experimental data;

[0060] Among them, the first deformation coefficient and the second deformation coefficient are both expressed by the formula Processed;

[0061] Where, is the number of deformation monitoring points, is the proportional coefficient corresponding to the detection value of each deformation detection point, For the The deformation value detected by the deformation detection point, is the deformation value detected at the fixed detection point, is the proportional coefficient.

[0062] In the present invention, the deformation of the hydropower station bridge crane is first monitored at the deformation detection point and the fixed detection point by using a displacement sensor or other professional deformation detection equipment, and the formula After processing, it is divided into the first deformation coefficient and the second deformation coefficient according to the two states of static load and dynamic load. Obviously, if the first deformation coefficient is large, it means that the bridge deformation of the hydropower station bridge crane is large when the static load is applied. If the second deformation coefficient is large, it means that the bridge deformation of the hydropower station bridge crane is large when the dynamic load is applied. On the contrary, it means that the bridge deformation is small. Then, through the formula The bridge deformation index reflecting the overall deformation of the hydropower station bridge crane is calculated , can be directly obtained through the above formula 、 The smaller the value, the closer the deformation of the hydropower station bridge crane is to the reference value under static load and dynamic load, and the smaller the deviation from the reference value is. The bigger, The larger the value is, the greater the change in one of the first deformation coefficient and the second deformation coefficient is. Therefore, the bridge deformation index is The larger it is, the more accurate the deformation detection can be achieved by integrating the deformation detection of the hydropower station bridge crane itself and the deformation detection that is not affected by the state of the hydropower station bridge crane. On the other hand, the deformation of the hydropower station bridge crane under static load and dynamic load can be integrated to comprehensively analyze and calculate the bridge deformation index that reflects the real deformation of the hydropower station bridge crane, thereby improving the detection accuracy of the hydropower station bridge crane deformation.

[0063] The operational safety index pass:

[0064] Obtain the first operating coefficient of the hydropower station bridge crane under different applied loads , Second operating factor under dynamic load Then, substitute into the formula Calculated;

[0065] Where, 、 It is a preset coefficient, which is formulated through historical experimental data. The first The curve of the first operating coefficient of the applied load changing with time, The first The change curve of the second operating coefficient of the applied load over time, 、 This is a reference curve, which is obtained based on industry experience data and historical data analysis. I will not elaborate on it here. For the detection period, 、 is the reference coefficient, the default .

[0066] The present invention first obtains the first Variation curve of applied load with time and dynamic load Variation curve of applied load with time , and then by the formula Calculate the operation safety index , obviously, The larger the value, the higher the first operating coefficient. The change range during the detection period and the reference curve The greater the ratio of the change range, the greater the operation safety index The larger the value, the higher the second operating coefficient. The change range during the detection period and the reference curve The greater the ratio of the change range, the greater the operation safety index , so that the overall operation safety index can be reflected according to the change of the first operation coefficient and the change of the second operation coefficient.

[0067] The first potential risk factor :

[0068] By formula Calculated;

[0069] Where, is the bridge deformation index, is the operational safety index, 、 is the weight factor, which is determined comprehensively based on historical data and experience data.

[0070] The present invention is through formula Calculate the first potential risk coefficient , obviously if The larger the value is, the greater the first potential risk factor is. The greater the impact, The larger the value is, the greater the first potential risk factor is. Therefore, the above model can more accurately reflect the potential risk of the hydropower station bridge crane and further reduce the possibility of misjudgment.

[0071] The quadratic evaluation coefficient :

[0072] By formula Calculated;

[0073] Where, For the The curve of the operational safety index changing with time when a load is applied is shown in Figure 1. For the The curve of the bridge deformation index changing with time when the load is applied. 、 is the influence coefficient, For the A standard curve of the operating safety index changing with time when a load is applied. For the A standard curve of the bridge deformation index changing with time when a load is applied. 、 They are Below and The number of areas enclosed above, Below and The number of areas enclosed above.

[0074] The present invention obtains the operation safety index and bridge deformation index change curves under different applied loads, and then compares them with their respective standard curves. 、 It shows that the greater the deviation, the greater the secondary evaluation coefficient, and vice versa, the smaller the secondary evaluation coefficient. Therefore, a correlation model can be established based on the operation safety index and bridge deformation index under each applied load, so as to accurately predict the safety piles of the hydropower station bridge crane.

[0075] The working process of S4 is as follows:

[0076] S41, will run the safety index , bridge deformation index Respectively with their respective preset thresholds 、 Compare;

[0077] S42, if satisfied or If at least one of the following is true, then the process goes to S43; otherwise, it is determined that the hydropower station bridge crane is safe;

[0078] S43, the calculated first potential risk coefficient and potential risk warning values Make comparisons;

[0079] S44, if , it is preliminarily judged that the hydropower station bridge crane has potential danger and enters S5. , then it is judged that the hydropower station bridge crane is safe.

[0080] The present invention provides a specific step of S4, firstly, the operation safety index , bridge deformation index Respectively with their respective preset thresholds 、 Compare, if satisfied or If at least one of the following is found, then the process goes to S43, otherwise it is determined that the hydropower station bridge crane is safe; then the calculated first potential risk coefficient and potential risk warning values For comparison, if , it is preliminarily judged that the hydropower station bridge crane has potential danger and enters S5. , it is judged that the hydropower station bridge crane is safe, thereby achieving the purpose of reducing false alarms.

[0081] The working process of S5 is as follows:

[0082] S51, the secondary evaluation coefficient With preset reference value Compare;

[0083] S52, if , then the judgment result in S3 is true, and step S6 is executed; if , then the judgment result in S3 is false, and step S53 is executed;

[0084] S53, if S42 and , then 、 All adjustments are made according to the predetermined adjustment strategy;

[0085] If only , then Make adjustments according to the predetermined adjustment strategy;

[0086] If only , then Make adjustments according to the predetermined adjustment strategy.

[0087] The present invention provides a specific working method of S5, firstly the secondary evaluation coefficient With preset reference value Compare, if , then the judgment result in S3 is true, and step S6 is executed; if , then the judgment result in S3 is false, and step S53 is executed. Then, if the judgment result in S42 is false, and , then 、 All are adjusted according to the predetermined adjustment strategy; if only , then Adjust according to the predetermined adjustment strategy; if only , then Adjustments are made according to a predetermined adjustment strategy. The above process achieves the purpose of preventing false alarms while dynamically adjusting the preset threshold. It should be noted that the preset threshold is determined based on analysis of historical data and empirical data.

[0088] The process of establishing the adjustment strategy is as follows:

[0089] Will Difference from setting For comparison, if , then or according to times to enlarge; set the difference The selection and formulation were made based on historical data and experimental data, which will not be elaborated here;

[0090] like , then the preset threshold is set according to times to expand, where is a fixed coefficient, and >1; 、 It is a preset proportional coefficient, determined based on analysis of historical experimental data.

[0091] The present invention provides a method for establishing an adjustment strategy by Difference from setting By comparison, it is obvious that if , it means that the threshold is set too small, so or according to times to expand, if , it means that the threshold is set too small, so the preset threshold is set according to The preset threshold can be dynamically adjusted to improve the detection efficiency of the bridge crane of the hydropower station.

[0092] The above is a detailed description of an embodiment of the present invention. However, the content described is only a preferred embodiment of the present invention and should not be considered to limit the scope of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A load test method suitable for a hydropower station bridge crane, characterized in that: include: S1. Apply a load to the hydropower station bridge crane through a load application module, and adjust the size of the applied load as needed; S2. Delineate a plurality of deformation detection points on the bridge crane of the hydropower station, and set a fixed detection point on a side away from the bridge crane of the hydropower station to obtain first deformation data of the bridge frame under static load and second deformation data of the bridge frame under dynamic load, respectively, and obtain a bridge frame deformation index after processing and analyzing the first deformation data of the bridge frame and the second deformation data of the bridge frame; S3, obtaining the first operating parameter and the second operating parameter of the hydropower station bridge crane under the static load and the dynamic load through the detection equipment, and obtaining the operation safety index after analyzing and processing the first operating parameter and the second operating parameter; S4, comparing the bridge deformation index and the operation safety index with their respective preset thresholds, if at least one of them exceeds the preset threshold, obtaining a first potential risk coefficient based on the bridge deformation index and the operation safety index, judging whether the hydropower station bridge crane has potential danger based on the first potential risk coefficient, if it is preliminarily judged that the hydropower station bridge crane has potential danger, proceeding to S5, otherwise judging that the hydropower station bridge crane is safe; S5, performing a secondary evaluation on the state of the hydropower station bridge machine according to the bridge deformation index exceeding the preset threshold or the number of times the operation safety index triggers the preset threshold within a unit time, and the change amplitude exceeding the preset threshold, to obtain a secondary evaluation coefficient; S6, verifying whether the judgment result in S4 is true according to the comparison result between the secondary evaluation coefficient and the preset reference value, if true, executing S7, otherwise, generating an adjustment instruction, and adjusting the preset threshold in S4 according to the secondary evaluation coefficient according to a predetermined adjustment strategy; S7. Issue early warning alarms to bridge cranes in hydropower stations that are judged to be potentially dangerous.

2. The load test method for a hydropower station bridge crane according to claim 1 is characterized in that: The bridge deformation index pass: Obtain the first deformation coefficient of the bridge under different applied loads , the second deformation coefficient of the bridge Then, substitute into the formula Calculated; In the formula is the judgment function, if or If is 0, The value is 1, otherwise, , For the The weight coefficient corresponding to the applied load, is the type of load applied, , is the reference value; Wherein, the first deformation coefficient and the second deformation coefficient are both expressed by the formula Processed; In the formula, is the number of deformation monitoring points, is the proportional coefficient corresponding to the detection value of each deformation detection point, For the The deformation value detected by the deformation detection point, is the deformation value detected at the fixed detection point, is the proportionality coefficient.

3. The load test method for a hydropower station bridge crane according to claim 2 is characterized in that: Operational safety index pass: Obtain the first operating coefficient of the hydropower station bridge machine under static load under different applied loads , the second operating factor at dynamic load Then, substitute into the formula Calculated; In the formula, , is the preset coefficient, The first time under static load during the test period The variation curve of the first operating coefficient of the applied load over time, The first The variation curve of the second operating coefficient of the applied load over time, , is the reference curve, For the detection period, , is the reference coefficient.

4. The load test method for a hydropower station bridge crane according to claim 3 is characterized in that: The first potential risk factor : By formula Calculated; In the formula, is the bridge deformation index, For the operational safety index, , is the weight factor.

5. The load test method applicable to a hydropower station bridge crane according to claim 4 is characterized in that: The secondary evaluation coefficient : By formula Calculated; In the formula, For the The curve of the operating safety index changing with time when a load is applied. For the The curve of the bridge deformation index changing with time when a load is applied. , is the influence coefficient, For the A standard curve of the operating safety index changing with time when a load is applied. For the The standard curve of the bridge deformation index changing with time when a load is applied is shown in Figure 1. , They are Below and The number of areas enclosed above, Below and The number of areas enclosed above.

6. The load test method for a hydropower station bridge crane according to claim 1 or 5, characterized in that: The working process of S4 is as follows: S41, will run the safety index , Bridge deformation index Respectively with their respective preset thresholds , Compare; S42, if satisfied or If at least one of the above is true, the process goes to S43, otherwise it is determined that the hydropower station bridge crane is safe; S43, the calculated first potential risk coefficient Potential risk warning value Make comparisons; S44, if , it is preliminarily judged that the hydropower station bridge crane has potential danger and enters S5. , then it is judged that the bridge crane of the hydropower station is safe.

7. The load test method for a hydropower station bridge crane according to claim 6 is characterized in that: The working process of S5 is as follows: S51, the secondary evaluation coefficient With preset reference value Compare; S52, if , then the judgment result in S3 is true, and step S6 is executed; if , then the judgment result in S3 is false, and step S53 is executed; S53, if S42 and , then , All adjustments are made according to the predetermined adjustment strategy; If only , then Make adjustments according to the predetermined adjustment strategy; If only , then Make adjustments according to the predetermined adjustment strategy.

8. The load test method for a hydropower station bridge crane according to claim 7 is characterized in that: The establishment process of the adjustment strategy is as follows: Will Difference from setting For comparison, if , then or according to times to expand; like , then the preset threshold is set according to times to expand, where is a fixed coefficient, and >1; , is the preset scale factor.

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