Preparation method of fire-resistant damping stay cable based on Internet of Things

Abstract

The invention relates to the technical field of bridge cables, in particular to a preparation method of a fire-resistant damping type stay cable based on the Internet of Things. The vibration condition of the stay cable is comprehensively analyzed according to the vibration condition of a plurality of point positions on the stay cable and the pressure change condition of the joint of the stay cable and the damping device, the poorer the damping effect of the stay cable is, the higher the vibration frequency of each point position is, and the higher the fluctuation degree of the pressure value of the joint is. The damping effect of the stay cable is comprehensively analyzed according to the vibration condition of each point position of the stay cable and the change condition of force between the end of the stay cable and the damping device, parameters in the stay cable preparation process are adjusted according to the analysis result, the damping capacity of the stay cable is improved, potential safety hazards of the stay cable are reduced, and the service life of the stay cable is prolonged. And comprehensively analyzing the condition of the stay cable according to the length and the traction force of the stay cable, so that the length and the traction force reach a balanced state.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge cables, and in particular to a method for preparing a fire-resistant and shock-absorbing type inclined cable based on the Internet of Things. Background Art

[0002] The cable is a key load-bearing component in a cable-stayed bridge, which transfers the load of the main beam to the bridge tower. In the prior art, a plurality of steel wires are closely arranged in a hexagonal shape to form a steel wire bundle, a polyester fiber belt is continuously wound along the outer edge of the steel wire bundle, and a polyethylene sheath is placed on the outside. The outer layer of the smooth steel wire is coated with a zinc-aluminum coating and an epoxy resin coating in sequence, and the steel wire surface of the cable is provided with a zinc-aluminum coating and an epoxy resin coating from the inside to the outside, thereby improving the corrosion resistance of the cable, but the influence of the strength of the cable on the seismic effect of the cable is not considered.

[0003] Chinese Patent Publication No.: CN104947591A discloses a method for preparing a corrosion-resistant cable and steel wire with a composite protective layer for a cable-stayed bridge, wherein a plurality of steel wires are closely arranged in a hexagonal shape to form a steel wire bundle, a polyester fiber belt is continuously wound along the outer edge of the steel wire bundle, and a polyethylene sheath is placed on the outside, the epoxy resin coating is stripped off the outer layer of the steel wire that is inserted into the anchor cup, and epoxy resin filler is filled between the inner cavity of the anchor cup and the steel wire bundle to form a cold cast anchor or zinc-copper alloy is filled to form a hot cast anchor; the steel wire includes a smooth steel wire at the core, and the outer layer of the smooth steel wire is sequentially coated with a zinc-aluminum coating and an epoxy resin coating. The surface of the steel wire constituting the cable is provided with a zinc-aluminum coating and an epoxy resin coating from the inside to the outside, and the anti-corrosion life can reach more than 100 years, thereby improving the corrosion resistance of the cable. In addition, the invention also provides a method for preparing steel wire with a simple process.

[0004] However, the prior art still has the following problems:

[0005] The strength of the cable, the effect of the matching degree of the cable length and the traction force on the seismic effect of the cable are not taken into consideration. Summary of the invention

[0006] To this end, the present invention provides a method for preparing a fire-resistant and shock-absorbing inclined cable based on the Internet of Things, so as to overcome the problem in the prior art that the strength of the inclined cable and the influence of the matching degree of the length of the inclined cable and the traction force on the seismic effect of the inclined cable are not taken into consideration.

[0007] To achieve the above-mentioned purpose, the present invention provides a method for preparing a fire-resistant and shock-absorbing type inclined cable based on the Internet of Things. The method comprises:

[0008] The steel wire coated with the fire retardant coating is twisted according to the predetermined twisting parameters to obtain a stay cable, a shock absorbing device provided with a pressure sensor is installed on the stay cable, a vibration test is performed on the stay cable, and a vibration sensor is used to detect the vibration frequency of each target point on the stay cable;

[0009] Calculating a shock absorption degree characterization parameter of the inclined cable based on the vibration frequency of each target point on the inclined cable collected by the vibration sensor and the pressure measured by the pressure sensor, and analyzing whether the shock absorption performance of the inclined cable is qualified based on the shock absorption degree characterization parameter;

[0010] Based on the analysis results, the subsequent preparation parameters of the cable are determined, including:

[0011] The balance parameter is determined based on the length of the inclined cable and the preload force of the shock absorbing device on the inclined cable, and a secondary judgment is made on whether the shock absorbing performance of the inclined cable is qualified according to the balance parameter. The reason why the shock absorbing performance of the inclined cable is unqualified is analyzed based on the vibration conditions of each target point, and the pitch of the inclined cable, the traction force of the shock absorbing device on the inclined cable, and the twisting rate in the preparation process of the inclined cable are adjusted based on the analysis results.

[0012] Or, maintain the parameters during the preparation of the cable and the traction force during the installation of the cable.

[0013] Furthermore, the vibration frequency of each target point on the cable collected by the vibration sensor and the pressure measured by the pressure sensor are used to calculate the shock absorption degree characterization parameter of the cable, including:

[0014] Obtain the vibration frequency of each target point on the cable.

[0015] Calculate the mean vibration frequency of each target point.

[0016] Calculate the ratio of the vibration frequency mean to the preset vibration frequency standard threshold to obtain the first vibration feature,

[0017] Get the pressure value at each time node measured by the pressure sensor,

[0018] Calculate the variance of the pressure value at each time node,

[0019] The ratio of the variance to the preset variance standard threshold is calculated to obtain the second vibration feature.

[0020] The first vibration characteristic and the second vibration characteristic are weightedly summed to obtain a parameter representing the degree of damping.

[0021] Furthermore, the analysis of whether the shock absorption performance of the cable is qualified based on the shock absorption degree characterization parameter includes:

[0022] If the shock absorption degree characterization parameter is less than or equal to the first preset shock absorption degree characterization parameter standard threshold value, it is determined that the shock absorption performance of the inclined cable is qualified;

[0023] If the damping degree characterizing parameter is greater than the first preset damping degree characterizing parameter standard threshold value and less than or equal to the second preset damping degree characterizing parameter standard threshold value, it is determined whether the damping performance of the inclined cable is qualified by secondary determination based on the balance parameter;

[0024] If the damping degree characterization parameter is greater than the second preset damping degree characterization parameter, it is determined that the damping performance of the inclined cable is unqualified, and the reason for the unqualified damping performance of the inclined cable is analyzed based on the vibration conditions of each target point.

[0025] Further, the determining of the balance parameter based on the length of the inclined cable and the pre-tightening force of the damping device on the inclined cable comprises:

[0026] Get the length of the cable and the traction force of the shock absorber on the cable respectively.

[0027] The ratio of the length of the inclined cable to the traction force is calculated to obtain the equilibrium parameter.

[0028] Furthermore, the secondary determination of whether the shock absorption performance of the cable is qualified according to the balance parameter includes:

[0029] If the balance parameter is greater than or equal to the preset balance parameter standard threshold, it is determined that the shock absorption performance of the inclined cable is unqualified, and the reason for the unqualified shock absorption performance of the inclined cable is analyzed based on the vibration conditions of each target point;

[0030] If the balance parameter is less than the preset balance parameter standard threshold, it is determined that the shock absorption performance of the inclined cable is qualified.

[0031] Furthermore, the reasons for analyzing the unqualified shock absorption performance of the inclined cable based on the vibration conditions of each target point include:

[0032] Get the vibration frequency of each target point,

[0033] Mark the target points that are higher than the preset vibration frequency standard threshold to obtain the risk target points.

[0034] Based on the distribution of each risk target point, the reasons why the shock absorption performance of the inclined cable is unqualified are analyzed.

[0035] If the risk target points are scattered, it is determined that the reason why the shock absorption performance of the inclined cable is unqualified is that the strength of the inclined cable is insufficient;

[0036] If the risk target points are concentrated in the middle of the cable, it is determined that the reason for the unqualified shock absorption performance of the cable is insufficient traction;

[0037] If the risk target points are concentrated at the ends of the inclined cables, it is determined that the reason for the unqualified shock absorption performance of the inclined cables is that the shock absorbers are unqualified.

[0038] Further, under the condition that the strength of the stay cable is determined to be insufficient, the pitch of the stay cable during the twisting process is reduced based on the number of risk target points, wherein:

[0039] The reduction in pitch is positively correlated with the number of risk targets.

[0040] Further, under the condition that the traction force is determined to be insufficient, the traction force of the shock absorbing device on the inclined cable is increased based on the average value of the vibration frequency of each risk target point, wherein:

[0041] The increase in traction force is positively correlated with the mean vibration frequency.

[0042] Further, under the condition that the shock absorber is judged to be unqualified, the twisting rate in the preparation process of the inclined cable is adjusted based on the vibration frequency of each target point of the inclined cable, including:

[0043] Get the vibration frequency of each target point,

[0044] The vibration frequency variance is calculated, and the twisting rate in the cable preparation process is adjusted based on the vibration frequency variance.

[0045] Furthermore, the twisting rate in the preparation process of the stay cable is adjusted based on the vibration frequency variance, wherein:

[0046] The reduction in twisting rate is positively correlated with the vibration frequency variance.

[0047] Compared with the prior art, the beneficial effect of the present invention lies in that, in the present invention, a vibration test is performed on the installed inclined cable, and the vibration condition of the inclined cable is comprehensively analyzed according to the vibration conditions of several points on the inclined cable and the pressure change at the joint of the inclined cable and the shock absorbing device. The worse the shock absorbing effect of the inclined cable is, the higher the vibration frequency of each point is, and the greater the fluctuation degree of the pressure value at the joint is. The shock absorbing effect of the inclined cable is comprehensively analyzed according to the vibration conditions of each point of the inclined cable and the force change between its end and the shock absorbing device, thereby improving the control accuracy of the vibration conditions of various parts of the inclined cable, adjusting the parameters in the preparation process of the inclined cable according to the analysis results, improving the shock absorbing capacity of the inclined cable, and reducing the safety hazards of the inclined cable.

[0048] Furthermore, the present invention takes into account that the longer the length of the inclined cable is, the easier it is to vibrate, and the greater the tension at both ends of the inclined cable is, the less likely the inclined cable is to vibrate. A secondary analysis is performed on the vibration of the inclined cable based on the length of the inclined cable and the traction force of fixing the inclined cable. If the inclined cable is short, the traction forces at both ends are large, and the vibration degree of the inclined cable is large, it means that there are problems in the preparation process of the inclined cable. The situation of the inclined cable is comprehensively analyzed based on the length and traction of the inclined cable, so that the length and traction are balanced, thereby improving the control accuracy of the inclined cable.

[0049] Furthermore, the present invention takes into account that uneven twisting during the preparation of the cable will lead to uneven strength of various parts of the cable, and thus first screens out points with greater vibration on the cable, and then analyzes the uniformity of the cable according to the distribution of each point, and then analyzes whether the preparation process of the cable is qualified. When it is determined that the distribution of each point is relatively dispersed, the cable is determined to be uneven. Considering that too fast a twisting speed during the preparation of the cable will lead to unevenness of the cable, the present invention reduces the twisting rate in the subsequent preparation process of the cable, and improves the uniformity of the cable after twisting. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 It is a flow chart of a method for preparing a fire-resistant and shock-absorbing inclined cable based on the Internet of Things;

[0051] Figure 2 A flow chart for analyzing whether the shock absorption performance of the inclined cable is qualified;

[0052] Figure 3 A flow chart for secondary determination of whether the shock absorption performance of the inclined cable is qualified;

[0053] Figure 4 A flow chart for analyzing the reasons why the shock-absorbing performance of the inclined cable is unqualified. DETAILED DESCRIPTION

[0054] In order to make the objects and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0055] It should be pointed out that the data in this embodiment are obtained by comprehensive analysis and evaluation of the historical data of the system of the present invention in the six months before this determination and the corresponding historical determination results. It can be understood by those skilled in the art that the determination method of the system of the present invention for a single parameter mentioned above can be to select the value with the highest proportion as the preset standard parameter according to the data distribution, use weighted summation to use the obtained value as the preset standard parameter, substitute each historical data into a specific formula and use the value obtained by the formula as the preset standard parameter or other selection methods, as long as the system of the present invention can clearly define different specific situations in the single determination process through the obtained values.

[0056] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0057] It should be noted that, in the description of the present invention, terms such as "up", "down", "left", "right", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is merely for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0058] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0059] See also Figure 1 As shown, it is a flow chart of the method for preparing fire-resistant and shock-absorbing inclined cables based on the Internet of Things.

[0060] The method for preparing a fire-resistant and shock-absorbing type inclined cable based on the Internet of Things provided in an embodiment of the present invention comprises:

[0061] The steel wire coated with the fire retardant coating is twisted according to the predetermined twisting parameters to obtain a stay cable, a shock absorbing device provided with a pressure sensor is installed on the stay cable, a vibration test is performed on the stay cable, and a vibration sensor is used to detect the vibration frequency of each target point on the stay cable;

[0062] Calculating a shock absorption degree characterization parameter of the inclined cable based on the vibration frequency of each target point on the inclined cable collected by the vibration sensor and the pressure measured by the pressure sensor, and analyzing whether the shock absorption performance of the inclined cable is qualified based on the shock absorption degree characterization parameter;

[0063] Based on the analysis results, the subsequent preparation parameters of the cable are determined, including:

[0064] The balance parameter is determined based on the length of the inclined cable and the preload force of the shock absorbing device on the inclined cable, and a secondary judgment is made on whether the shock absorbing performance of the inclined cable is qualified according to the balance parameter. The reason why the shock absorbing performance of the inclined cable is unqualified is analyzed based on the vibration conditions of each target point, and the pitch of the inclined cable, the traction force of the shock absorbing device on the inclined cable, and the twisting rate in the preparation process of the inclined cable are adjusted based on the analysis results.

[0065] Or, maintain the parameters during the preparation of the cable and the traction force during the installation of the cable.

[0066] Specifically, in this embodiment, the stay cables are installed on a movable test bench and a vibration test is performed on the stay cables.

[0067] Specifically, the vibration frequency of each target point on the cable collected by the vibration sensor and the pressure measured by the pressure sensor are used to calculate the vibration reduction degree characterization parameter of the cable, including:

[0068] Obtain the vibration frequency of each target point on the cable.

[0069] Calculate the mean vibration frequency of each target point.

[0070] Calculate the ratio of the vibration frequency mean to the preset vibration frequency standard threshold to obtain the first vibration feature,

[0071] Get the pressure value at each time node measured by the pressure sensor,

[0072] Calculate the variance of the pressure value at each time node,

[0073] The ratio of the variance to the preset variance standard threshold is calculated to obtain the second vibration feature.

[0074] The first vibration characteristic and the second vibration characteristic are weightedly summed to obtain a parameter representing the degree of damping.

[0075] Specifically, in this embodiment, the preset vibration frequency standard threshold and the preset variance standard threshold are obtained in advance, the vibration frequencies at each target point of a number of inclined cables within a predetermined time period and the pressure values ​​at the connection points of the inclined cable ends are obtained, the mean vibration frequency is solved, and the preset vibration frequency standard threshold is 1.2 to 1.3 times the mean vibration frequency. The variance of the pressure value at each time node is solved, and the preset variance standard threshold is 0.9 to 0.95 times the variance.

[0076] See also Figure 2 As shown, it is a flow chart for analyzing whether the shock-absorbing performance of the inclined cable is qualified.

[0077] Specifically, the analysis of whether the shock absorption performance of the cable is qualified based on the shock absorption degree characterization parameter includes:

[0078] If the shock absorption degree characterization parameter is less than or equal to the first preset shock absorption degree characterization parameter standard threshold value, it is determined that the shock absorption performance of the inclined cable is qualified;

[0079] If the damping degree characterizing parameter is greater than the first preset damping degree characterizing parameter standard threshold value and less than or equal to the second preset damping degree characterizing parameter standard threshold value, it is determined whether the damping performance of the inclined cable is qualified by secondary determination based on the balance parameter;

[0080] If the damping degree characterization parameter is greater than the second preset damping degree characterization parameter, it is determined that the damping performance of the inclined cable is unqualified, and the reason for the unqualified damping performance of the inclined cable is analyzed based on the vibration conditions of each target point.

[0081] Specifically, in this embodiment, the first preset shock absorption degree characterization parameter standard threshold is selected in the interval [0.8-0.95], and the second preset shock absorption degree characterization parameter is selected in the interval [1.15, 1.25].

[0082] Specifically, the determining of the balance parameter based on the length of the inclined cable and the pre-tightening force of the damping device on the inclined cable includes:

[0083] Get the length of the cable and the traction force of the shock absorber on the cable respectively.

[0084] The ratio of the length of the inclined cable to the traction force is calculated to obtain the equilibrium parameter.

[0085] See also Figure 3 As shown, it is a flow chart for secondary determination of whether the shock absorbing performance of the inclined cable is qualified.

[0086] Specifically, the secondary determination of whether the shock absorption performance of the cable is qualified according to the balance parameter includes:

[0087] If the balance parameter is greater than or equal to the preset balance parameter standard threshold, it is determined that the shock absorption performance of the inclined cable is unqualified, and the reason for the unqualified shock absorption performance of the inclined cable is analyzed based on the vibration conditions of each target point;

[0088] If the balance parameter is less than the preset balance parameter standard threshold, it is determined that the shock absorption performance of the inclined cable is qualified.

[0089] Specifically, in this embodiment, the preset balance parameter standard threshold is obtained by pre-measurement, obtaining the lengths and traction forces of several inclined cables, calculating the balance parameters of each inclined cable respectively, and solving the balance parameter mean. The preset balance parameter standard threshold is 0.95 to 1.15 times the balance parameter mean.

[0090] See also Figure 4 As shown, it is a determination flow chart for analyzing the reasons why the shock absorbing performance of the inclined cable is unqualified.

[0091] Specifically, the reasons for the unqualified shock absorption performance of the inclined cable based on the vibration conditions of each target point analysis include:

[0092] Get the vibration frequency of each target point,

[0093] Mark the target points that are higher than the preset vibration frequency standard threshold to obtain the risk target points.

[0094] Based on the distribution of each risk target point, the reasons why the shock absorption performance of the inclined cable is unqualified are analyzed.

[0095] If the risk target points are scattered, it is determined that the reason why the shock absorption performance of the inclined cable is unqualified is that the strength of the inclined cable is insufficient;

[0096] If the risk target points are concentrated in the middle of the cable, it is determined that the reason for the unqualified shock absorption performance of the cable is insufficient traction;

[0097] If the risk target points are concentrated at the ends of the inclined cables, it is determined that the reason for the unqualified shock absorption performance of the inclined cables is that the shock absorbers are unqualified.

[0098] Specifically, under the condition that the strength of the cable is determined to be insufficient, the pitch of the cable in the twisting process is reduced based on the number of risk target points, wherein:

[0099] The reduction in pitch is positively correlated with the number of risk targets.

[0100] In this embodiment, optionally,

[0101] The number of risk targets is compared with the first preset number and the second preset number,

[0102] If the number of risk targets is less than or equal to the first preset number, the first pitch is reduced, and the first pitch is 0.2 times the initial pitch;

[0103] If the number of risk targets is greater than the first preset number and less than or equal to the second preset number, then the second pitch is reduced, and the second pitch is 0.25 times the initial pitch;

[0104] If the number of risk targets is greater than the second preset number, the third pitch is reduced, and the third pitch is 0.3 times the initial pitch;

[0105] The first preset number is 0.15 times the total number of target points, and the second preset number is 0.25 times the total number of target points.

[0106] Specifically, under the condition that the traction force is determined to be insufficient, the traction force of the shock absorbing device on the inclined cable is increased based on the average value of the vibration frequency of each risk target point, wherein:

[0107] The increase in traction force is positively correlated with the mean vibration frequency.

[0108] In this embodiment, optionally,

[0109] The vibration frequency mean of each risk target point is compared with the first preset vibration frequency mean standard threshold and the second preset vibration frequency mean standard threshold.

[0110] If the vibration frequency mean of each risk target point is less than or equal to the first preset vibration frequency mean standard threshold, the first traction force is increased, and the first traction force is 0.15 times the initial traction force;

[0111] If the vibration frequency mean of each risk target point is greater than the first preset vibration frequency mean standard threshold and less than or equal to the second preset vibration frequency mean standard threshold, the second traction force is increased, and the second traction force is 0.2 times the initial traction force;

[0112] If the average vibration frequency of each risk target point is greater than the second preset vibration frequency average standard threshold, the third traction force is increased, and the third traction force is 0.3 times the initial traction force;

[0113] The first preset vibration frequency mean standard threshold is 1.5 to 1.6 times the preset vibration frequency standard threshold, and the second preset vibration frequency mean standard threshold is 1.7 to 1.8 times the preset vibration frequency standard threshold.

[0114] Specifically, under the condition that the shock absorber is judged to be unqualified, the twisting rate in the preparation process of the inclined cable is adjusted based on the vibration frequency of each target point of the inclined cable, including:

[0115] Get the vibration frequency of each target point,

[0116] The vibration frequency variance is calculated, and the twisting rate in the cable preparation process is adjusted based on the vibration frequency variance.

[0117] Specifically, the twisting rate in the preparation process of the inclined cable is adjusted based on the vibration frequency variance, wherein:

[0118] The reduction in twisting rate is positively correlated with the vibration frequency variance.

[0119] In this embodiment, optionally,

[0120] The vibration frequency variance is compared with the first preset vibration frequency variance standard threshold and the second preset vibration frequency,

[0121] If the vibration frequency variance is less than or equal to the first preset vibration frequency variance standard threshold, then reducing the first twisting rate, the first twisting rate is 0.2 times the initial twisting rate;

[0122] If the vibration frequency variance is greater than the first preset vibration frequency variance standard threshold and less than or equal to the second preset vibration frequency variance standard threshold, then reducing the second twisting rate, the second twisting rate is 0.25 times the initial twisting rate;

[0123] If the vibration frequency variance is greater than the second preset vibration frequency variance standard threshold, then reducing the third twisting rate, the third twisting rate is 0.35 times the initial twisting rate;

[0124] In this embodiment, the vibration frequencies of target points of several inclined cables are obtained, the variances of the vibration frequencies of target points of a single inclined cable are calculated respectively, and the variance mean of the vibration frequencies of each inclined cable is calculated. The first preset standard threshold value of the vibration frequency variance is 1.2 to 1.25 of the variance mean, and the second preset standard threshold value of the vibration frequency variance is 1.3 to 1.35 times of the variance mean.

[0125] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

[0126] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for preparing a fire-resistant and shock-absorbing inclined cable based on the Internet of Things, characterized in that: include: The steel wire coated with the fire retardant coating is twisted according to the predetermined twisting parameters to obtain a stay cable, a shock absorbing device provided with a pressure sensor is installed on the stay cable, a vibration test is performed on the stay cable, and a vibration sensor is used to detect the vibration frequency of each target point on the stay cable; Calculating a shock absorption degree characterization parameter of the cable based on the vibration frequency of each target point on the cable collected by the vibration sensor and the pressure measured by the pressure sensor, and analyzing whether the shock absorption performance of the cable is qualified based on the shock absorption degree characterization parameter; Based on the analysis results, the subsequent preparation parameters of the cable are determined, including: The balance parameter is determined based on the length of the inclined cable and the preload force of the shock absorbing device on the inclined cable, and a secondary judgment is made on whether the shock absorbing performance of the inclined cable is qualified according to the balance parameter. The reason why the shock absorbing performance of the inclined cable is unqualified is analyzed based on the vibration conditions of each target point, and the pitch of the inclined cable, the traction force of the shock absorbing device on the inclined cable, and the twisting rate in the preparation process of the inclined cable are adjusted based on the analysis results. Or, maintain the parameters during the preparation of the cable and the traction force during the installation of the cable.

2. The method for preparing a fire-resistant and shock-absorbing type cable-stayed cable based on the Internet of Things according to claim 1 is characterized in that: The calculation of the vibration reduction degree characterization parameter of the inclined cable based on the vibration frequency of each target point on the inclined cable collected by the vibration sensor and the pressure measured by the pressure sensor includes: Obtain the vibration frequency of each target point on the cable. Calculate the mean vibration frequency of each target point. Calculate the ratio of the vibration frequency mean to the preset vibration frequency standard threshold to obtain the first vibration feature, Get the pressure value at each time node measured by the pressure sensor, Calculate the variance of the pressure value at each time node, The ratio of the variance to the preset variance standard threshold is calculated to obtain the second vibration feature. The first vibration characteristic and the second vibration characteristic are weightedly summed to obtain a parameter representing the degree of damping.

3. The method for preparing a fire-resistant and shock-absorbing type cable based on the Internet of Things according to claim 1 is characterized in that: The analysis of whether the shock absorption performance of the cable is qualified based on the shock absorption degree characterization parameter includes: If the shock absorption degree characterization parameter is less than or equal to the first preset shock absorption degree characterization parameter standard threshold value, it is determined that the shock absorption performance of the inclined cable is qualified; If the damping degree characterizing parameter is greater than the first preset damping degree characterizing parameter standard threshold value and less than or equal to the second preset damping degree characterizing parameter standard threshold value, it is determined whether the damping performance of the inclined cable is qualified by secondary determination based on the balance parameter; If the shock absorption degree characterization parameter is greater than the second preset shock absorption degree characterization parameter, it is determined that the shock absorption performance of the inclined cable is unqualified, and the reason for the unqualified shock absorption performance of the inclined cable is analyzed based on the vibration conditions of each target point.

4. The method for preparing a fire-resistant and shock-absorbing type cable based on the Internet of Things according to claim 1 is characterized in that: The determining of the balance parameter based on the length of the inclined cable and the pre-tightening force of the damping device on the inclined cable comprises: Get the length of the cable and the traction force of the shock absorber on the cable respectively. The ratio of the length of the inclined cable to the traction force is calculated to obtain the equilibrium parameter.

5. The method for preparing a fire-resistant and shock-absorbing type cable-stayed cable based on the Internet of Things according to claim 1 is characterized in that: The secondary determination of whether the shock absorption performance of the cable is qualified according to the balance parameter includes: If the balance parameter is greater than or equal to the preset balance parameter standard threshold, it is determined that the shock absorption performance of the inclined cable is unqualified, and the reason for the unqualified shock absorption performance of the inclined cable is analyzed based on the vibration conditions of each target point; If the balance parameter is less than the preset balance parameter standard threshold, it is determined that the shock absorption performance of the inclined cable is qualified.

6. The method for preparing a fire-resistant and shock-absorbing type cable-stayed cable based on the Internet of Things according to claim 1 is characterized in that: The reasons for the unqualified shock absorption performance of the inclined cable analyzed based on the vibration conditions of each target point include: Get the vibration frequency of each target point, Mark the target points that are higher than the preset vibration frequency standard threshold to obtain the risk target points. Based on the distribution of each risk target point, the reasons why the shock absorption performance of the inclined cable is unqualified are analyzed. If the risk target points are scattered, it is determined that the reason why the shock absorption performance of the inclined cable is unqualified is that the strength of the inclined cable is insufficient; If the risk target points are concentrated in the middle of the cable, it is determined that the reason for the unqualified shock absorption performance of the cable is insufficient traction; If the risk target points are concentrated at the ends of the inclined cables, it is determined that the reason for the unqualified shock absorption performance of the inclined cables is that the shock absorbers are unqualified.

7. The method for preparing a fire-resistant and shock-absorbing type cable-stayed cable based on the Internet of Things according to claim 6 is characterized in that: Under the condition that the strength of the inclined cable is determined to be insufficient, the pitch of the inclined cable during the twisting process is reduced based on the number of risk target points, wherein: The reduction in pitch is positively correlated with the number of risk targets.

8. The method for preparing a fire-resistant and shock-absorbing type cable-stayed cable based on the Internet of Things according to claim 6 is characterized in that: Under the condition that the traction force is determined to be insufficient, the traction force of the shock absorbing device on the inclined cable is increased based on the average value of the vibration frequency of each risk target point, wherein: The increase in traction force is positively correlated with the mean vibration frequency.

9. The method for preparing a fire-resistant and shock-absorbing type cable-stayed cable based on the Internet of Things according to claim 6, characterized in that: Under the condition that the shock absorber is judged to be unqualified, the twisting rate in the preparation process of the inclined cable is adjusted based on the vibration frequency of each target point of the inclined cable, including: Get the vibration frequency of each target point, The vibration frequency variance is calculated, and the twisting rate in the cable preparation process is adjusted based on the vibration frequency variance.

10. The method for preparing fire-resistant and shock-absorbing inclined cables based on the Internet of Things according to claim 9 is characterized in that: The twisting rate in the preparation process of the inclined cable is adjusted based on the vibration frequency variance, wherein: The reduction in twisting rate is positively correlated with the vibration frequency variance.

Images