A method and system for accurately determining cable forces in a cable structure under operating conditions

Abstract

This invention discloses a method and system for accurately determining the cable force of a cable structure in operation. The system includes a cable force identification device, a cable force analysis device, and sensors. The cable force identification device is used for cable force identification, calculation, and system control. The sensors are used to acquire identification parameters. The cable force analysis device is used to verify the identification results, determine whether the preliminary identification results are compliant, and calculate the final cable force identification result. The method for accurately determining the cable force avoids cable force identification deviations caused by internal and external factors by performing compliance judgment on the cable force identification results and using a two-stage judgment method consisting of preliminary identification result judgment and optimized calculation result judgment. This effectively improves the accuracy and reliability of cable force identification and achieves accurate determination of the cable force in operation.

Description

Technical Field

[0001] This invention relates to the field of cable force measurement technology, specifically to a method and system for accurately determining the cable force of a cable structure in operation. Background Technology

[0002] Cable-stayed structures are widely used in large public buildings. As the service life of a cable-stayed structure increases, factors such as material degradation and environmental effects can cause changes in cable tension, posing significant safety hazards and seriously threatening people's lives and property. Regularly identifying cable tension is crucial to ensuring that cable-stayed structures are operating normally.

[0003] Current cable force identification methods can be mainly divided into two types: interventional and non-interventional. Interventional methods primarily involve installing tension sensors on the cable body and using tooling for reverse jacking. The cable force value is directly identified by reading sensor signals or using a hydraulic pressure gauge on the tooling. This method is direct and accurate, but because it requires disassembling the cable body and incurs significant economic and manpower costs, it is unsuitable for large-scale cable structures or structures with safety hazards. Non-interventional methods mainly include the frequency method, magnetic flux method, and three-point bending method. Among these, the magnetic flux method requires calibration of the cable material, installation of various devices, and complex calculations of the data, resulting in high technical requirements and costs, making it unsuitable for cable force identification in existing cable structures and large-scale cable bodies. The frequency method is easily affected by boundary conditions and environmental noise, and is more suitable for long, single cables with reliable constraints; however, the accuracy of cable force identification in cable structures is easily limited. The three-point bending method is generally highly applicable and is not easily affected by cable constraints and the environment. However, due to the limitations of current product design and testing methods, it can usually only detect cables with a maximum diameter of 40mm. The performance of cable force identification still needs to be improved through the research and development of cable force identification methods and technologies.

[0004] CN220170414U discloses a cable force identification device for precisely controlling cable deformation. By setting a limit nut, the tensioning distance of the jack can be precisely controlled. The tension value of a fixed-length cable is measured by adjusting the nut and a pressure sensor. The measured cable force is calculated using the tension value, cable deformation value, and lateral tension displacement value of the fixed-length cable. Compared with similar cable force identification devices, it has significant improvements in the range of cable diameter detection and ease of operation. While this device can effectively measure the cable force, it provides a single-shot cable force identification result for the entire cable. Due to the lack of corresponding verification methods and comparisons, the accuracy of the cable force identification result cannot be guaranteed under the influence of temperature changes, wind-induced vibration, operational errors, and initial instrument errors. This invention provides a method and system for accurately determining the cable force of a cable structure in operation to solve the above problems. Summary of the Invention

[0005] This invention provides a method and system for accurately determining the cable force of a cable structure in operation, thereby achieving accurate determination of the cable force value of the measured cable.

[0006] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows:

[0007] A method for accurately determining the cable force of a cable structure in operation includes the following steps:

[0008] S1, connect the cable tension recognition module to the cable;

[0009] The cable force identification module is activated to identify the cable force once, and the single identification data is output to the cable force analysis module to complete the single identification operation;

[0010] S2, repeat the single identification operation n times to complete the identification of the entire cable force of the entire cable;

[0011] The entire cable force recognition n Each single identification data point is combined into a complete set of identification data in the cable force analysis module;

[0012] S3 verifies the entire set of identification data through the cable force analysis module;

[0013] If all individual recognition data in the entire set of recognition data are compliant, then the preliminary recognition result of "compliant" will be output.

[0014] If there is a non-compliant single identification data in the entire set of identification data, the preliminary identification result of "non-compliant" will be output.

[0015] S4. If the preliminary identification result is "compliant", the cable force identification operation of the cable is completed and the cable force identification of the next cable is carried out.

[0016] If the initial identification result is "non-compliant", the identification and verification will be carried out again until a "compliant" initial identification result is output.

[0017] S5, after outputting the initial identification result of "compliance", performs the optimized calculation of cable force and judges the compliance of the optimized cable force value;

[0018] If the calculated cable force optimization value is deemed compliant, the final cable force identification result of the cable will be output.

[0019] If the calculated cable force optimization value is determined to be non-compliant, the cable force identification will be re-performed starting from step S1 until the calculated cable force optimization value is compliant, and then the final cable force identification result of the cable will be output.

[0020] Furthermore, in step S1, for the first... i Genlaso conducted the first jDuring the second cable force identification, identification parameters are acquired and single identification data A is generated in the cable force identification module. C (i,j) is:

[0021] ,

[0022] Among them, the identification parameters are lateral force. P Lateral displacement D, temperature T at the cable test point C The acceleration a at the cable test point C And the preliminary calculated value F of the cable force. C ,

[0023] The lateral displacement D is obtained by applying a lateral force P to the i-th cable using the cable force identification device.

[0024] Temperature T at the cable test point C The acceleration a at the cable test point C Measured directly by sensors;

[0025] Preliminary calculation value of cable force F C The result is obtained by calculation using formula (1):

[0026] (1),

[0027] In the formula, L is the maximum span of the contact point between the cable force identification module and the cable;

[0028] K1 and K2 are the operating parameters of the cable force identification module, which are obtained from the calibration of the cable force identification module at the factory and are inherent parameters of the cable force identification module.

[0029] Furthermore, in step S2, at the... i Repeat on the root cable n The complete set of identification data A obtained from secondary cable force identification S (i) is n A single recognition data point A C The set of (i,j), where, n are positive integers and n ≥4:

[0030] .

[0031] Furthermore, when the initial identification result is "non-compliant," the re-identification operation is as follows:

[0032] In step S3, if there are non-compliant single-identification data, the preliminary identification result of "non-compliant" and the number of "non-compliant" single-identification data are output. k ;

[0033] In step S4, further processing is performed on the cable. k Secondary force identification, forming k A new single-identification data, generated in step S3 k Replace each non-compliant single identification data, and then return to step S3 to process the newly obtained data. k Each single identification data point is verified;

[0034] For newly acquired k When verifying individual recognition data

[0035] like k =0, that is k If all new single-identification data are "compliant", then output a preliminary "compliant" identification result, completing the first identification. i The entire cable force identification of the root cable is carried out. i +1 cable tension identification;

[0036] like k ≠0, that is k If any new single-identification data still contains "non-compliant" single-identification data, the initial identification result is "non-compliant," and the S3-S4 operation is repeated until... k =0, and then output the preliminary identification result of "compliant".

[0037] Furthermore, in step S3, the single-time recognition data A is matched one by one according to formulas (2), (3), and (4). C T in (i,j) C (i,j), F C (i,j), a C (i,j) performs a compliance assessment.

[0038] (2),

[0039] (3),

[0040] (4),

[0041] In the formula, G1(n,α) is the critical value in the Grubbs critical value table when the data size is n and the significance level is α;

[0042] G T (i,j), G F (i,j) represents the statistic;

[0043] σ T (i) and σ F (i) represents the temperature T at the cable test point. C (i,j) and the preliminary calculated value of cable force FC The standard deviation of (i,j);

[0044] a S For acceleration limits;

[0045] T C (i,j), a C (i,j), F C (i,j) represent the values ​​of the i-th and j-th elements, respectively. i The temperature, acceleration, and preliminary calculated cable force of the cable test point are obtained when the cable force is identified for the j-th time.

[0046] If A C If (i,j) simultaneously satisfy formulas (2), (3), and (4), then the single identification data is considered compliant;

[0047] If A C If (i,j) cannot simultaneously satisfy formulas (2), (3), and (4), then the single identification data is considered non-compliant.

[0048] Furthermore, in step S5, after outputting the preliminary identification result of "compliance", the cable force is optimized and calculated according to formulas (5), (6), and (7) to obtain the optimized cable force value F. S (i,j),

[0049] (5),

[0050] (6),

[0051] (7),

[0052] Then, the cable force optimization calculation value F is performed according to formula (8). S (i,j) performs a compliance assessment.

[0053] (8),

[0054] In the formula, G2(n-1,α) is the critical value in the Grubbs critical value table when the data size is n-1 and the significance level is α;

[0055] G FS (i,j) represents the statistic;

[0056] σ FS (i) is the F value of the cable force optimization calculation. S (i,j) standard deviation of the tension.

[0057] Furthermore, in step S5, if the calculated value of the cable force optimization is F... SIf (i,j) is deemed compliant, then the first criterion is calculated according to formula (9). i Final cable force identification result F of the root cable D (i),

[0058] (9);

[0059] If the optimized calculation value of cable force F S If (i,j) is deemed non-compliant, then let k=n, and start from step S1 again to re-compile the i-th... i The cable force is identified by the root cable, and the process is repeated until the optimized cable force calculation value F is obtained. S (i,j) is deemed compliant, and the final cable force identification result F is calculated. D (i).

[0060] A system for accurately determining cable forces in a cable structure during operation includes a cable force identification module, a cable force analysis module, and sensors;

[0061] The cable force identification module includes a cable force identification device and a controller;

[0062] The cable force identification device is installed on the cable to identify the cable force and output the identification parameters to the controller; the controller is used to control the cable force identification device, the cable force analysis module and the sensor, and to obtain single identification data based on the identification parameters.

[0063] The sensor is used to measure temperature T. C and acceleration a C And output it to the controller;

[0064] The cable force analysis module is used to verify the identification results, determine whether the preliminary identification results are "compliant", and calculate the optimized cable force value F. S (i,j) and determine whether it is "compliant", calculate and output the final cable force identification result F. D (i).

[0065] Furthermore, the cable force identification device identifies cable force based on the three-point bending method.

[0066] Furthermore, the sensors are a temperature sensor and a vibration sensor. The temperature sensor is installed on the cable being tested or a specimen of similar material to measure the temperature T at the test point of the cable. C The vibration sensor is installed on the cable under test to measure the acceleration 'a' at the test point of the cable. C .

[0067] The beneficial effects of this invention are as follows:

[0068] After cable force identification, the compliance of the cable force identification results is judged. A two-stage judgment method consisting of preliminary identification result judgment and optimized calculation result judgment is adopted to judge the cable force identification results, avoiding cable force identification deviation caused by internal and external factors, effectively improving the accuracy and reliability of cable force identification, and realizing accurate determination of cable force in operation. Attached Figure Description

[0069] Figure 1 This is a schematic diagram of the overall process of the present invention;

[0070] Figure 2 This is a schematic diagram of the cable force recognition state of the cable force recognition device of the present invention;

[0071] Figure 3 This is a schematic diagram of the control logic of the present invention when applied to long-term monitoring. Detailed Implementation

[0072] The technical solutions in 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.

[0073] In the description of this invention, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0074] like Figure 2 , 3 As shown, a system for accurately determining the cable force of a cable structure in operation includes a cable force identification module, a cable force analysis module, and sensors.

[0075] The cable force identification module includes a cable force identification device and a controller;

[0076] The cable force identification device is a device for cable force identification and detection based on the three-point bending method. Preferably, it is a cable force detection device for accurately controlling cable deformation disclosed in CN220170414U, which is installed on the cable and outputs identification parameters to the controller.

[0077] Both the controller and the cable force analysis module are built into the building structure safety status analysis platform. The cable force identification device is connected to the controller via a signal, and the controller and the cable force analysis module are connected via a signal.

[0078] The controller is used to control the cable force identification device, the cable force analysis module, and the sensor, and to acquire the lateral force P and lateral displacement D output by the cable force identification device, as well as the temperature T of the cable test point output by the sensor. C The acceleration a at the cable test point C The system calculates the initial identification data based on the identification parameters and outputs the initial identification data to the cable force analysis module.

[0079] The sensors are a temperature sensor and a vibration sensor. The temperature sensor is installed on the cable or a similar material specimen under test to measure the temperature T at the test point of the cable. C The vibration sensor is installed on the cable under test to measure the acceleration 'a' at the test point of the cable. C And the temperature T at the cable test point C The acceleration a at the cable test point C Output to the controller;

[0080] The cable force analysis module is used to verify the identification results, determine whether the preliminary identification results are "compliant", and calculate the optimized cable force value F. S (i,j) and determine whether it is "compliant", calculate and output the final cable force identification result F. D (i).

[0081] Furthermore, the cable force identification device and controller, cable force analysis module and sensor are connected via wired or wireless transmission.

[0082] like Figure 3 As shown, the system formed by the cable force identification module, cable force analysis module, and sensor can also be used for long-term cable force monitoring. The cable force identification device and sensor are installed on the cable that needs to be monitored and connected to the controller and cable force analysis module via wired or wireless transmission. The cable force identification device and sensor perform real-time cable force identification, and the controller and cable force analysis module perform real-time detection. The cable force is periodically identified or identified as needed to achieve long-term cable force monitoring.

[0083] like Figure 1 As shown, a method for accurately determining the cable force of a cable structure in operation is described, which achieves accurate determination of the cable force through the following steps.

[0084] S1. According to the usage method disclosed in CN220170414U, the cable force identification module is installed on the cable and the cable force identification module is started to identify the cable force, obtain single identification data and output it to the cable force analysis module to complete the single identification operation.

[0085] Install the cable recognition module and sensor in the first... i After being connected to the root cable and the controller and cable force analysis module, the first step is performed through the controller. j The specific operation of the cable force identification is as follows: First, the controller controls all devices to clear the data, then controls the cable force identification module to perform cable force identification. The cable force identification module identifies the cable force by... i After applying a lateral force P(i,j) to the cable, the lateral displacement D(i,j) is obtained, and the temperature T at the test point of the cable is obtained through a sensor. C (i,j), acceleration a at the cable test point C (i,j), the controller obtains the first... j The identification parameters for the secondary cable force are used to calculate the preliminary cable force value F using formula (1). C (i,j), to obtain the first i Genlasodi j Single recognition data for secondary cable force recognition and the single identification data A C (i,j) is output to the cable force analysis module;

[0086] Preliminary calculation value of cable force F C (i,j) is calculated using formula (1).

[0087] (1),

[0088] In the formula, L is the maximum span of the contact point between the cable force identification module and the cable;

[0089] K1 and K2 are the operating parameters of the cable force identification module, which are obtained from the calibration of the cable force identification module at the factory. They are inherent parameters of the cable force identification module and are built into the controller.

[0090] S2, following the operation of step S1 in the... i Repeat on the root cable n The single recognition operation completes the first i Identification of the entire cable force of the root cable. n are positive integers and n ≥4, the entire set of cable force identification data A is formed by combining all individual identification data in the cable force analysis module. S (i);

[0091] The entire set of recognition data A S (i) isn A single recognition data point A C The set of (i,j):

[0092] .

[0093] S3, the cable force analysis module verifies the entire set of identification data. The cable force analysis module performs data verification by controlling the "Data Verification" button on the controller. i The complete set of recognition data A of Genlaso S All single-identification data A in (i) C (i,j) is used for verification.

[0094] During verification, if the entire set of recognition data A S (i) All single-identification data A C If all (i,j) are compliant, then output the preliminary identification result of "compliant";

[0095] If the entire set of identification data A S (i) contains non-compliant single-identification data A C If (i,j), then the initial identification result of "non-compliant" will be output, and the cable identification and verification will be performed again.

[0096] For a single recognition data A C When verifying (i,j), check the single-recognition data A one by one according to formulas (2), (3), and (4). C T in (i,j) C (i,j), F C (i,j), a C (i,j) performs a compliance assessment.

[0097] If A C If (i,j) simultaneously satisfy formulas (2), (3), and (4), then the single recognition data A is considered to be... C (i,j) is compliant;

[0098] If A C If (i,j) cannot simultaneously satisfy formulas (2), (3), and (4), then the single recognition data A is considered to be... C (i,j) is non-compliant;

[0099] (2),

[0100] (3),

[0101] (4),

[0102] In the formula, G1(n,α) is the critical value in the Grubbs critical value table when the data size is n and the significance level is α;

[0103] G T (i,j), G F (i,j) represents the statistic;

[0104] σ T (i) and σ F (i) and T are temperature test data respectively. C (i,j) and the cable force identification result F C The standard deviation of (i,j);

[0105] a S For acceleration limits;

[0106] T C (i,j), a C (i,j), F C (i,j) represent the values ​​of the i-th and j-th elements, respectively. i The temperature, acceleration, and preliminary calculated cable force of the cable test point are obtained from the j-th cable force identification.

[0107] S4, if the preliminary identification result is "compliant", then complete the next step. i The entire cable force identification of the root cable is carried out. i +1 cable tension identification;

[0108] If the initial identification result is "non-compliant", the identification and verification will be carried out again until a "compliant" initial identification result is output.

[0109] The procedure for re-identifying when the initial identification result is "non-compliant" is as follows:

[0110] If non-compliant single-identification data is found during the data verification in step S3, the preliminary identification result of "non-compliant" and the number of "non-compliant" single-identification data k are output.

[0111] During re-identification, at the first i Perform k more cable force identifications on the root cable to form k new single identification data. Replace the k non-compliant single identification data in step S3, and then return to step S3 to verify the newly obtained k single identification data.

[0112] For newly acquired k When verifying individual recognition data

[0113] If k=0, meaning all k new single-identification data are "compliant", then output the preliminary identification result of "compliant", thus completing the first identification. iThe entire cable force identification of the root cable is carried out. i +1 cable tension identification;

[0114] If k≠0, that is k If there are still "non-compliant" single identification data in a new single identification data, the preliminary identification result is "non-compliant". Then, the S3-S4 operation is repeated until k=0, and then the preliminary identification result of "compliant" is output.

[0115] S5, after outputting the initial identification result of "compliance", performs the optimized calculation of cable force and judges the compliance of the optimized cable force value;

[0116] When outputting the initial identification result of "compliance", the cable force is optimized according to formulas (5), (6), and (7) to obtain the optimized cable force value F. S (i,j),

[0117] (5),

[0118] (6),

[0119] (7),

[0120] Then, the cable force optimization calculation value F is performed according to formula (8). S (i,j) performs a compliance assessment.

[0121] (8),

[0122] In the formula, G2(n-1,α) is the critical value in the Grubbs critical value table when the data size is n-1 and the significance level is α;

[0123] G FS (i,j) represents the statistic;

[0124] σ FS (i) represents the cable force optimization calculation value F. S The standard deviation of (i,j);

[0125] If the optimized calculation value of cable force F S If (i,j) is deemed compliant, then the first criterion is calculated according to formula (9). i Final cable force identification result F of the root cable D (i) and output it.

[0126] (9).

[0127] If the calculated value of the optimization is determined to be non-compliant, then the "non-compliant" single identification data A is set to... CThe number of (i,j) is k=n, which means the entire set of identification data A S (i) Reset to zero, and then start the cable force identification again from step S1 until the cable force optimization calculation value is compliant, and then output the final cable force identification result of the cable.

[0128] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention, and no reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A method for accurately determining the cable force of a cable structure in operation, characterized in that, Includes the following steps: S1, connect the cable tension recognition module to the cable; The cable force identification module is activated to identify the cable force once, and the single identification data is output to the cable force analysis module to complete the single identification operation; S2, repeat. n Each single identification operation completes the identification of the entire cable force of the entire cable; The entire cable force recognition n Each single identification data point is combined into a complete set of identification data in the cable force analysis module; S3 verifies the entire set of identification data through the cable force analysis module; If all individual recognition data in the entire set of recognition data are compliant, then the preliminary recognition result of "compliant" will be output. If there is a non-compliant single identification data in the entire set of identification data, the preliminary identification result of "non-compliant" will be output. S4. If the preliminary identification result is "compliant", the cable force identification operation of the cable is completed, and the cable force identification of the next cable is carried out. If the initial identification result is "non-compliant", the identification and verification will be carried out again until a "compliant" initial identification result is output. S5, after outputting the initial identification result of "compliance", performs the optimized calculation of cable force and judges the compliance of the optimized cable force value; If the calculated cable force optimization value is deemed compliant, the final cable force identification result of the cable will be output. If the calculated cable force optimization value is determined to be non-compliant, the cable force identification will be re-performed starting from step S1 until the calculated cable force optimization value is compliant, and then the final cable force identification result of the cable will be output.

2. The method for accurately determining the cable force of a cable structure in operation according to claim 1, characterized in that the steps are as follows: In S1, for the first i Genlaso conducted the first j During the second cable force identification, identification parameters are acquired and single identification data A is generated in the cable force identification module. C (i,j) is: ， The identification parameters are the lateral force P, the lateral displacement D, and the temperature T at the cable test point. C The acceleration a at the cable test point C And the preliminary calculated value F of the cable force. C , The lateral displacement D is obtained by applying a lateral force P to the i-th cable using the cable force identification device in the cable force identification module. Temperature T at the cable test point C The acceleration a at the cable test point C Measured directly by sensors; Preliminary calculation value of cable force F C The result is obtained by calculation using formula (1): （1）， In the formula, L is the maximum span of the contact point between the cable force identification device and the cable; K1 and K2 are the operating parameters of the cable force identification device, which are obtained from the calibration of the cable force identification device at the factory and are inherent parameters of the cable force identification device.

3. The method for accurately determining the cable force of a cable structure in operation according to claim 2, characterized in that, In step S2, at the first i Repeat on the root cable n The complete set of identification data A obtained from secondary cable force identification S (i) is n A single recognition data point A C The set of (i,j): 。 4. The method for accurately determining the cable force of a cable structure in operation as described in claim 3, characterized in that, When the initial identification result is "non-compliant", the re-identification operation is as follows: In step S3, if there are non-compliant single-identification data, the preliminary identification result of "non-compliant" and the number of "non-compliant" single-identification data are output. k ; In step S4, further processing is performed on the cable. k Secondary force identification, forming k A new single-identification data, generated in step S3 k Replace each non-compliant single identification data, and then return to step S3 to process the newly obtained data. k Each single identification data point is verified; For newly acquired k When verifying individual recognition data like k =0, that is k If all new single-identification data are "compliant", then output a preliminary "compliant" identification result, completing the first identification. i The entire cable force identification of the root cable is carried out. i +1 cable tension identification; like k ≠0, that is k If any new single-identification data still contains "non-compliant" single-identification data, the initial identification result is "non-compliant," and the S3-S4 operation is repeated until... k =0, and then output the preliminary identification result of "compliant".

5. The method for accurately determining the cable force of a cable structure in operation according to claim 2, characterized in that, In step S3, the single-recognition data A is matched one by one according to formulas (2), (3), and (4). C T in (i,j) C (i,j), F C (i,j), a C (i,j) performs a compliance assessment. （2）， （3）， （4）， In the formula, G1(n,α) is the critical value in the Grubbs critical value table when the data size is n and the significance level is α; G T (i,j), G F (i,j) represents the statistic; σ T (i) and σ F (i) represents the temperature T at the cable test point. C (i,j) and the preliminary calculated value of cable force F C The standard deviation of (i,j); a S For acceleration limits; T C (i,j), a C (i,j), F C (i,j) represent the values ​​of the i-th and j-th elements, respectively. i The temperature, acceleration, and preliminary calculated cable force of the cable test point are obtained when the cable force is identified for the j-th time. If A C If (i,j) simultaneously satisfy formulas (2), (3), and (4), then the single identification data is considered compliant; If A C If (i,j) cannot simultaneously satisfy formulas (2), (3), and (4), then the single identification data is considered non-compliant.

6. The method for accurately determining the cable force of a cable structure in operation according to claim 2, characterized in that, In step S5, after outputting the preliminary identification result of "compliance", the cable force is optimized and calculated according to formulas (5), (6), and (7) to obtain the optimized cable force value F. S (i,j), （5）， （6）， （7）， Then, the cable force optimization calculation value F is performed according to formula (8). S (i,j) performs a compliance assessment. （8）， In the formula, G2(n-1,α) is the critical value in the Grubbs critical value table when the data size is n-1 and the significance level is α; G FS (i,j) represents the statistic; σ FS (i) is the F value of the cable force optimization calculation. S (i,j) Standard deviation is the standard deviation of the optimized calculated value.

7. The method for accurately determining the cable force of a cable structure in operation according to claim 2, characterized in that, In step S5, if the calculated value of cable force optimization F S If (i,j) is deemed compliant, then the first criterion is calculated according to formula (9). i Final cable force identification result F of the root cable D (i), （9）； If the optimized calculation value of cable force F S If (i,j) is deemed non-compliant, then let k=n, and start from step S1 again to re-compile the i-th... i The cable force is identified from the root cable until the optimized cable force calculation value F is reached. S (i,j) is deemed compliant, and the final cable force identification result F is calculated. D (i).

8. A system for a method of accurately determining cable forces in a cable structure under operating conditions as described in any one of claims 1-7, characterized in that, Includes a cable force identification module, a cable force analysis module, and sensors; The cable force identification module includes a cable force identification device and a controller; the cable force identification device is installed on the cable and is used to identify the cable force and output identification parameters. The controller is used to control the cable force identification device, cable force analysis module and sensor, and to obtain single identification data based on the identification parameters; The sensor is used to measure temperature T. C and acceleration a C And output it to the controller; The cable force analysis module is used to verify the identification results, determine whether the preliminary identification results are "compliant", and calculate the optimized cable force value F. S (i,j) and determine whether it is "compliant", calculate and output the final cable force identification result F. D (i).

9. The system for accurately determining cable forces in a cable structure during operation, as described in claim 8, is characterized in that... The cable force identification device identifies cable force based on the three-point bending method.

10. The system for accurately determining cable forces in a cable structure during operation, as described in claim 8, is characterized in that... The sensors are a temperature sensor and a vibration sensor. The temperature sensor is installed on the cable or a similar material specimen under test to measure the temperature T at the test point of the cable. C The vibration sensor is installed on the cable under test to measure the acceleration 'a' at the test point of the cable. C .

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