Suspension bridge main cable strand temperature sensing system, method and device and storage medium

Abstract

The invention provides a suspension bridge main cable strand temperature sensing system, method and device and a storage medium, and the method comprises the steps: determining the distance from the cable strand section temperature of a temperature reference cable strand segment to the boundary in the axial direction based on a cable strand segment sunlight analysis model constructed by finite element software, and determining the effective length of the temperature reference cable strand segment; after each temperature reference cable strand segment is arranged to a set height above each set node in the span of the erected cable strand, and the to-be-erected cable strand is translated to the same area above the erected cable strand for a set time length; based on the temperature sensors of all the temperature reference cable strand segments, temperature data of all the set nodes corresponding to the to-be-erected cable strand span are obtained; and determining the temperature of each small section based on the temperature data of each set node corresponding to the span of the to-be-erected cable strand, and obtaining a temperature distribution result of the to-be-erected cable strand through linear interpolation based on the temperatures of all the small sections. By adopting the sensing method provided by the invention, the linear regulation and control of the cable strand under any environment temperature condition can be realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of suspension bridge cable adjustment, and in particular to a suspension bridge main cable strand temperature sensing system, method, device and storage medium. BACKGROUND

[0002] ‌The main cable is the lifeline of the suspension bridge, and its linear shape is an important guarantee for the construction quality of the suspension bridge. Currently, there are two methods for erecting the main cable, namely, the prefabricated parallel strand method (PPWS for short) and the air spinning method (AS for short). When the prefabricated parallel strand method is used to erect the main cable, the number of steel wires in the strand can be 91 wires, 127 wires, etc., and the main cable strands are preferably arranged in a regular hexagon.

[0003] With the continuous increase in the span of the suspension bridge, the temperature field thereof is gradually complex. Under the influence of atmospheric temperature and solar radiation, the linear shape of the main cable strand during construction changes greatly and deviates from the design linear shape. Therefore, it is necessary to accurately control the linear shape of the strand during the erection of the strand, adjust the length of the strand, and make each strand consistent with the design state at the design reference temperature, so that each strand is in a relatively stable state during construction.

[0004] The mainstream adjustment method currently used is to adjust the cable at a time when the temperature is relatively stable at night, with the reference strand as the reference for comparison and adjustment. However, the window period for adjustment is short, and only the strand traction can be performed during the day, and the adjustment is performed uniformly at night. This method has great limitations in terms of precision and progress. In order to achieve all-weather adjustment of the to-be-erected strand, it is necessary to determine the temperature distribution characteristics thereof. Due to the influence of solar radiation, the temperature of the to-be-erected strand changes in real time. If a direct measurement method is used to obtain the temperature field of the to-be-erected strand, the temperature sensor needs to be constantly disassembled and assembled, which greatly interferes with the site construction and has poor technical and economic efficiency.

[0005] Therefore, a suspension bridge strand temperature adjustment control twin system, method, device and storage medium are needed to at least partially solve the above technical problems. SUMMARY

[0006] In view of this, the embodiments of the present application provide a suspension bridge main cable strand temperature sensing system, method, device and storage medium to at least solve one of the problems in the prior art.

[0007] In a first aspect, the embodiments of the present application provide a suspension bridge main cable strand temperature sensing method, which comprises: Based on the strand segment solar analysis model constructed by the finite element software, the distance of the strand cross-section temperature of the temperature reference strand segment decaying to the boundary along the axial direction is determined, and the effective length of the temperature reference strand segment is determined in combination with the temperature sensor arrangement length for sensing the temperature characteristics of the middle section of the temperature reference strand segment not affected by the boundary. after each temperature reference cable strand segment is arranged at a set height above each set node in the erected cable strand span, and after the to-be-erected cable strand is translated to a set length of time in the same region above the erected cable strand, the temperature sensor arranged at the middle section of each temperature reference cable strand segment obtains temperature data at the corresponding set node in the to-be-erected cable strand span; each segment formed based on each set node in the to-be-erected cable strand span is divided into a set number of small segments, the temperature of each small segment is determined based on the temperature data at the corresponding set node in the to-be-erected cable strand span, and the temperature distribution result of the to-be-erected cable strand is obtained by linear interpolation based on the temperatures of all small segments.

[0008] In a second aspect, the embodiments of the present application further provide a suspension bridge main cable strand temperature sensing device, the sensing device comprising: a memory for storing computer executable instructions; a processor for executing the computer executable instructions stored in the memory to implement the sensing method of the above technical solution.

[0009] In a third aspect, the embodiments of the present application further provide a storage medium storing computer instructions, wherein the computer instructions are used to make the computer execute the sensing method of the above technical solution.

[0010] In a fourth aspect, the embodiments of the present application further provide a suspension bridge main cable strand temperature sensing system, the sensing system comprising: temperature reference cable strand segments for being arranged at a set height above each set node in the erected cable strand span; temperature sensors for sensing the temperature characteristics of the middle section of the temperature reference cable strand segment not affected by the boundary; a data transceiver; a processing terminal, the processing terminal being built-in with a cable strand segment solar radiation analysis model, and being used for: determining the distance of the axial attenuation of the cable strand section temperature of the temperature reference cable strand segment to the boundary based on the cable strand segment solar radiation analysis model, and determining the effective length of the temperature reference cable strand segment in combination with the arrangement length of the temperature sensor for sensing the temperature characteristics of the middle section of the temperature reference cable strand segment not affected by the boundary; after each temperature reference cable strand segment is arranged at a set height above each set node in the erected cable strand span, and after the to-be-erected cable strand is translated to a set length of time in the same region above the erected cable strand, the temperature sensor arranged at the middle section of each temperature reference cable strand segment obtains temperature data at the corresponding set node in the to-be-erected cable strand span; The temperature of each small section is determined based on the temperature data at the corresponding set node in the to-be-erected cable strand span, and the temperature distribution result of the to-be-erected cable strand is obtained through linear interpolation based on the temperature of all the small sections.

[0011] In the fifth aspect, the embodiment of the present application further provides a temperature sensing method for a main cable strand of a suspension bridge, based on the sensing system in the above technical solution, comprising the following steps: The effective length of each temperature reference cable strand section corresponding to each set node in the erected cable strand span is determined through the cable strand section solar radiation analysis model of the processing terminal; The temperature reference cable strand sections with a determined length are manufactured, the cross section of the cable strand section is consistent with the to-be-erected cable strand, the same steel wire size and number of wires are adopted, and an external thermistor temperature sensor and an internal thermistor temperature sensor are respectively preset on the periphery and the center of the middle section which is not affected by the boundary; The manufactured temperature reference cable strand sections are respectively installed at a set height above each set node in the erected cable strand span, then after the to-be-erected cable strand is completed, the to-be-erected cable strand is translated to the same area above the erected cable strand, and a set time length is kept, so that the temperature change of the to-be-erected cable strand is consistent with that of the temperature reference cable strand section; The temperature data of the temperature reference cable strand section at the corresponding position are collected by each temperature sensor and transmitted to the processing terminal; The temperature of each small section is determined based on the temperature data at the corresponding set node in the to-be-erected cable strand span, and the temperature distribution result of the to-be-erected cable strand is obtained through linear interpolation based on the temperature of all the small sections.

[0012] According to the sensing method of the embodiment of the present application, the effective length of the temperature reference cable strand section is determined according to the actual environment, then the temperature data obtained by the temperature sensor arranged in the middle section of each temperature reference cable strand section after installation is taken as the temperature data at the corresponding set node in the to-be-erected cable strand span, and finally the temperature reconstruction of the to-be-erected cable strand is realized through finer small section division and linear interpolation, so as to guide the cable adjustment control of the suspension bridge under any temperature state, and solve the limitation that the cable temperature is not clear in the traditional construction process and the cable needs to be adjusted at the moment when the environmental temperature is stable.

[0013] Additional advantages, objects, and features of the application will be set forth in part by the description that follows, and will become apparent to those skilled in the art upon examination of the following or can be learned by practice of the application. The objects and other advantages of the application can be realized and attained by the structure particularly pointed out in the specification as well as in the appended claims.

[0014] Those skilled in the art will understand that the objects and advantages of the application can be realized and attained by means of the subject-matter as described in the following detailed description, and it will be understood by those skilled in the art from the following detailed description that the objects and advantages of the application can be realized and attained. BRIEF DESCRIPTION OF DRAWINGS

[0015] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description, serve to explain the principles of the application. The components in the drawings are not necessarily to scale, emphasis instead being placed upon illustrating the principles of the application. For purposes of clarity and understanding, it is to be understood that certain portions of the drawings can be exaggerated and others omitted in order to more clearly disclose and describe the principles of the present application. In the drawings: Figure 1 Flow chart of the sensing method according to an embodiment of the present application; Figure 2 Temperature distribution of cable strand segments not affected by sunlight and affected by sunlight respectively in the sensing method according to an embodiment of the present application; Figure 3 Schematic diagram of sunlight analysis model of cable strand segments in the sensing method according to an embodiment of the present application; Figure 4 Temperature axial distribution and axial attenuation law curve of cable strand segments in the sensing method according to an embodiment of the present application; Figure 5 Arrangement of temperature reference cable strand segments in the sensing method according to an embodiment of the present application; Figure 6 Segment distribution of cable strands to be erected in the sensing method according to an embodiment of the present application; Figure 7 Small segment division of cable strands to be erected in the sensing method according to an embodiment of the present application; Figure 8 Small node temperature subdivision of cable strands to be erected in the sensing method according to an embodiment of the present application; Figure 9 Small segment temperature distribution of cable strands to be erected in the sensing method according to an embodiment of the present application; Figure 10 Schematic diagram of the sensing device according to an embodiment of the present application; Figure 11 Schematic diagram of the computer device according to an embodiment of the present application; Figure 12 Schematic diagram of the sensing system according to an embodiment of the present application; Figure 13 Schematic diagram of the cable strand clamping device in the sensing system according to an embodiment of the present application; Figure 14 Fig. 1 is a schematic diagram of temperature sensor position distribution in a sensing system according to an embodiment of the present application; Figure 15 Fig. 2 is a flow chart of a sensing method according to another embodiment of the present application.

[0016] Legend of reference signs: 400: sensing system; 410: temperature reference cable segment; 420: temperature sensor; 430: data transceiver; 440: processing terminal; 450: cable clamping device; 451: erected cable clamping fixture; 452: temperature reference cable segment clamping fixture; 453: second connecting rod; 454: first connecting rod; 600: erected cable. DETAILED DESCRIPTION

[0017] In order to make the objectives, technical solutions, and advantages of the present application clearer, further detailed description will be given to the present application in combination with embodiments and drawings. Herein, the illustrative embodiments of the present application and their descriptions are used to explain the present application, but not as a limitation to the present application.

[0018] Herein, it is also necessary to mention that, in order to avoid the present application being obscured by unnecessary details, only the structures and / or processing steps closely related to the solutions according to the present application are shown in the drawings, and other details not closely related to the present application are omitted.

[0019] It should be emphasized that the term “comprises / comprising” as used herein refers to the presence of the stated features, elements, steps or components, but does not exclude the presence or addition of one or more other features, elements, steps or components.

[0020] Herein, it is also necessary to mention that, if not specially mentioned, the term “connection” as used herein can not only refer to direct connection, but also represent indirect connection with the presence of intermediate objects.

[0021] In the following, embodiments of the present application will be described with reference to the drawings. In the drawings, the same reference signs represent the same or similar components, or the same or similar steps.

[0022] Firstly, a sensing method for temperature of main cable of suspension bridge according to an embodiment of the present application will be described. Figure 1 Figure 1 ​As shown, the sensing method 100 can include steps S110 to S130. Details are as follows: At step S110, the distance of the cable section temperature of the temperature reference cable section along the axial direction to the boundary is determined based on the cable section solar radiation analysis model, and the effective length of the temperature reference cable section is determined in combination with the length of the temperature sensor arrangement for sensing the temperature characteristics of the middle section of the temperature reference cable section not affected by the boundary.

[0023] At step S120, after each temperature reference cable section is arranged to a set height above each set node in the erected cable span, and after the to-be-erected cable span is translated to the same region above the erected cable span for a set length of time, the temperature data at the corresponding set nodes in the to-be-erected cable span is obtained based on the temperature sensors arranged in the middle section of each temperature reference cable section.

[0024] At step S130, each section formed based on each set node in the to-be-erected cable span is divided into a set number of small sections, the temperature of each small section is determined based on the temperature data at the corresponding set nodes in the to-be-erected cable span, and the temperature distribution result of the to-be-erected cable is obtained by linear interpolation based on all the small section temperatures.

[0025] In the embodiment of the present application, first, the distance of the cable section temperature of the temperature reference cable section along the axial direction to the boundary is determined based on the cable section solar radiation analysis model constructed by the finite element software, and the effective length of the temperature reference cable section is determined in combination with the length of the temperature sensor arrangement for sensing the temperature characteristics of the middle section of the temperature reference cable section not affected by the boundary; then, after each temperature reference cable section is arranged to a set height above each set node in the erected cable span, and after the to-be-erected cable span is translated to the same region above the erected cable span for a set length of time, the temperature data at the corresponding set nodes in the to-be-erected cable span is obtained based on the temperature sensors arranged in the middle section of each temperature reference cable section; then, each section formed based on each set node in the to-be-erected cable span is divided into a set number of small sections, the temperature of each small section is determined based on the temperature data at the corresponding set nodes in the to-be-erected cable span, and finally, the temperature distribution result of the to-be-erected cable is obtained by linear interpolation based on all the small section temperatures.

[0026] As can be known from the description of the above process, the sensing method 100 according to the embodiment of the present application can realize the linear adjustment of the cable without being limited to the environment with stable night temperature, and can realize the linear adjustment of the cable under any environmental temperature conditions. Compared with the prior art, the temperature reference cable section is used to replace the whole temperature reference cable or the scale cable, which has significant technical and economic advantages and operational convenience.

[0027] The following will be described in combination with Figure 1The specific description includes the above-described steps of the perception method 100 according to the embodiments of this application.

[0028] In the embodiments of this application, in step S110, the solar radiation analysis model of the cable strand segment constructed based on finite element software is used to determine the distance by which the temperature of the cable strand section of the temperature reference segment decays axially to the boundary. The effective length of the temperature reference cable strand segment is determined by combining the length of the temperature sensor arrangement used to sense the temperature characteristics of the intermediate section of the temperature reference cable strand segment that is not affected by the boundary.

[0029] Specifically, before proceeding to step S110, a solar radiation analysis model of the cable strand segment can be constructed using finite element software. This model is typically built using finite element software based on data such as the cable strand segment dimensions and the thermal conductivity coefficient of the cable wire material. The solar radiation analysis model can simulate the temperature transfer along the cable strand axis and reveal the axial temperature decay pattern of the cable strand.

[0030] In this embodiment, the segment length of the temperature reference cable strand is the main factor affecting its temperature measurement results. For the entire cable strand, sunlight only acts on its surface, and the temperature distribution is as follows: Figure 2 In (a), the temperature distribution along the length direction is basically consistent, but the cross-section of the cable strand is exposed to the atmosphere, and the solar radiation temperature will affect its temperature distribution along the axial direction, as shown in (a). Figure 2 (b) leads to a discrepancy between the temperature distribution of the strand segments and the temperature distribution of the entire strand, resulting in inconsistent average strand temperatures. Therefore, it is necessary to clarify the temperature attenuation law of solar radiation along the axial direction of the strand segments, and thus obtain the temperature boundary where the average temperature of the strand segments is not affected by their length.

[0031] The temperature decay of the cable strand segments along the structure is affected by the thermal conductivity coefficients of the structural materials (including the axial and vertical thermal conductivity coefficients of the cable strands), the initial temperature of the cable strand segments, the temperature of the cable strand cross-section after heating, and the surface temperature of the cable strand after heating. A solar radiation analysis model of the cable strand segments constructed using finite element method software can determine the temperature boundary where the average temperature of the cable strand segments is unaffected by their length. The process is as follows: The initial temperature of the reference cable segment, the cross-sectional temperature of the cable segment after heating, the surface temperature of the cable segment after heating, and the thermal conductivity coefficient of the cable wire material are input into the solar radiation analysis model of the cable segment to obtain the temperature distribution and axial attenuation law of the cable segment.

[0032] Based on the temperature distribution and axial attenuation law of the cable segment, the distance at which the temperature of the cable section of the reference cable segment attenuates axially to the boundary is determined. When the temperature distribution of the cable segment approaches stability, the corresponding distance is the distance at which the temperature of the cable section attenuates axially to the boundary.

[0033] Then, the effective length of the temperature reference cable segment is obtained in combination with the length of the temperature sensor arrangement for sensing the temperature characteristic of the middle section of the temperature reference cable segment which is not affected by the boundary.

[0034] the effective length of the temperature reference cable segment .

[0035] wherein, is the distance of the axial decay of the cable section temperature of the temperature reference cable segment to the boundary. is the length of the middle section of the temperature reference cable segment which is not affected by the boundary. The temperature characteristic of the middle section of the temperature reference cable segment which is not affected by the boundary can represent the actual cable temperature condition. is generally not less than the length of the temperature sensor arrangement (length of the temperature probe) for sensing the temperature characteristic of the middle section of the temperature reference cable segment which is not affected by the boundary.

[0036] For example, see Figure 3 and Figure 4 A cable segment solar radiation analysis model is established taking a 10 cm diameter cable as an example. It is assumed that the initial cable initial temperature is 25℃, the cable section temperature reaches 50℃ after warming, and the surface temperature is also 50℃. The cable wire material thermal conductivity coefficient is known to be 50 W / (m·K), i.e. the cable axial thermal conductivity coefficient. The inter-wire thermal conductivity coefficient is only 1 / 50 of it, i.e. 1 W / (m·K), i.e. the cable vertical thermal conductivity coefficient. The cable segment temperature distribution and axial decay law are calculated by inputting the finite element model. The cable thermal conductivity coefficient can be valued according to experience, the cable initial temperature and surface temperature are measured on site when the reference cable (the first cable of the main cable erection) is erected, and the cable section temperature is the initial value of the temperature decay along the cable axis. The value is the maximum value of the cable surface temperature, and the temperature collection data of the reference cable erection is accurate.

[0037] Taking the current cable segment as an example, the minimum segment length i.e. the temperature of the 0.5 m long cable segment can represent the temperature of the cable with the same section length.

[0038] Although the temperature of the cable to be assumed along the axis will have certain differences, the effective length of the temperature reference cable segment corresponding to each set position will also have slight differences. For ease of implementation, each temperature reference cable segment will adopt a suitable length.

[0039] In the embodiment of the present application, in step S120, the temperature reference cable segments are arranged above the set height of the set nodes in the erected cable span, and after the to-be-erected cable is translated to the same region above the erected cable for a set time, the temperature data at the corresponding set nodes in the to-be-erected cable span are obtained based on the temperature sensors arranged in the middle sections of the temperature reference cable segments.

[0040] Specifically, before step S120 is performed, the temperature reference cable segments need to be arranged above the set height of the set nodes in the erected cable span.

[0041] In the embodiment, the temperature reference cable segments are arranged at the 8 / 8 points in the main cable span, which includes 9 cable segments. The arrangement form is shown in FIG. 2. Figure 5

[0042] When the temperature reference cable segments are arranged, they are respectively installed above the set height of the set nodes in the erected cable span according to the 8 / 8 points in the erected cable, that is, the main cable saddles 1, 1 / 8 span, 1 / 4 span, 3 / 8 span, 1 / 2 span, 5 / 8 span, 3 / 4 span, 7 / 8 span and the main cable saddles 2, numbered T1, T2,..., T9. For example, the cable segment maintains a height difference of at least 20 cm from the erected cable.

[0043] When the temperature reference cable segments are arranged, there are mainly three principles: first, to avoid as much as possible the interference with the construction environment on site; second, to be consistent as much as possible with the to-be-erected cable (cable height, spatial posture, line shape, shielding condition, etc.); and third, to follow, that is, the temperature reference cable segments follow the main cable to move, so that their movement trajectories remain consistent.

[0044] Compared with the full-length temperature reference cable, the cable segments with effective length selected in the embodiment can avoid the interference with the construction on site, and the trouble of arranging the full-length temperature reference cable is saved. The temperature reference cable segments can be directly erected at the corresponding positions of the cable after the deployment of the bridge under the cable, and are light, adjustable and flexible to install.

[0045] Then, after the to-be-erected cable is completed, the to-be-erected cable is translated to the same region above the erected cable, and a set time, for example, 5 minutes, is maintained, so that the temperature change of the to-be-erected cable is consistent with the corresponding cable segment, that is, the cable temperature sensing can be performed.

[0046] ​Generally, a plurality of temperature sensors are arranged in the middle section of the cable segment corresponding to each set node in the erected cable span, and the average value of the temperature values sensed by the plurality of temperature sensors at a certain time is taken as the temperature data at that time. Then, the temperature data (average temperature) of the cable segment at each set node is taken as the temperature data at each set node in the cable span to be erected. The temperature sensor can be a thermal resistance temperature sensor.

[0047] Since the present embodiment adopts a temperature reference cable segment, it is more convenient to obtain the corresponding temperature data through the cable segment. At the same time, compared with the fact that the central temperature of the whole cable cannot be obtained, the central temperature of the cable can be obtained, and the corresponding temperature data obtained through the temperature reference cable segment is also more accurate.

[0048] In the embodiment of the present application, each segment formed based on each set node in the cable span to be erected is divided into a set number of small segments in step S130, the temperature of each small segment is determined based on the temperature data at the corresponding set node in the cable span to be erected, and the temperature distribution result of the cable to be erected is obtained by linear interpolation based on all small segment temperatures.

[0049] Specifically, the reconstruction of the temperature distribution of the cable to be erected is realized in the form of linear interpolation. Since the cable is symmetrical about the sagging point in the span, and there is only an elevation difference between the segments formed based on each set node in the cable span to be erected, and the temperature decreases by 0.6°C for every 100m increase in altitude, the temperature distribution of the cable can be considered to change linearly along the axial direction, and the temperature difference between the segments can be averaged to each subdivided segment. Therefore, the segment temperature can be labeled according to the linearity of the cable to be erected; then a set number of temperature interpolation points are arranged between each segment, and interpolation calculation is performed according to the linearity; finally, the temperature of the corresponding set node is converted into the small segment temperature, and the temperature field reconstruction of the whole cable is obtained.

[0050] Among them, the node temperature of each small node for dividing small segments in the cable span to be erected is determined based on the temperature data at the corresponding set node in the cable span to be erected.

[0051] Then, the average value of the node temperatures of the two small nodes corresponding to each small segment is taken as the temperature of each small segment.

[0052] It is assumed that the middle node corresponding to the set node in the cable span to be erected is the sagging point in the span, the cable span to be erected includes segments, and each segment is equally divided into small segments.

[0053] The node temperature of the th small node of the th segment is .

[0054] .

[0055] wherein, , , represents the temperature data at the corresponding th set node when the to-be-erected strand span is numbered from left to right.

[0056] the th segment of the th sub-segment temperature .

[0057] For example, referring to Figure 6 , taking a to-be-erected strand as an example, it is divided into 8 segments, a total of nine set nodes, namely, numbered T1, T2,..., T9. For ease of description, referring to Figure 7 , taking the fourth segment as an example, the fourth segment is divided into 10 sub-segments, namely , the temperature interpolation of the fourth segment is solved.

[0058] Then the small nodes for dividing the sub-segments in the span of the to-be-erected strand, a total of 11 small nodes (including T4, T5). The temperature change between the adjacent two small nodes is: .

[0059] Taking Figure 8 , for example, the node temperature of the th small node of the fourth segment is . The distribution of the temperature values of the small nodes is shown in Figure 8 .

[0060] Then, the average value of the node temperatures of the two small nodes corresponding to each small segment is taken as the temperature of each small segment, as shown in Figure 9 .

[0061] By analogy, the other segments are obtained, and finally the temperature distribution result of the to-be-erected strand is obtained through linear interpolation (or linear fitting).

[0062] Based on the above description, according to the sensing method 100 of the embodiments of the present application, the strand linear adjustment can be performed under any environmental temperature condition without being limited to the environment with stable night temperature, and compared with the prior art, the temperature reference strand segment is adopted instead of the whole temperature reference strand or the scale strand, which has significant technical and economic efficiency and operation convenience.

[0063] Referring to Figure 10The perception device 200 for implementing the perception method 100 according to the embodiments of the present application includes a processor 210 and a storage 220. The perception device 200 can include one or more processors 210, one or more memories 220. The memory 220 stores executable programs run by the processor 210, which, when run by the processor 210, causes the processor 210 to perform the perception method 100 according to the embodiments of the present application as described above.

[0064] The processor 210 can be a central processing unit (CPU) or other forms of processing unit having data processing capability and / or instruction execution capability.

[0065] The memory 220 can include one or more computer program products, which can include various forms of computer readable storage media, such as volatile memory and / or non-volatile memory. The volatile memory can include, for example, random access memory (RAM), cache memory and the like. The non-volatile memory can include, for example, read only memory (ROM), hard disk, flash memory and the like. One or more computer program instructions can be stored on the computer readable storage medium, and the processor 210 can run the program instructions to implement the client functions (implemented by the processor) in the embodiments of the present application described herein and / or other desired functions. Various application programs and various data, such as various data used and / or generated by the application programs, and the like, can also be stored in the computer readable storage medium.

[0066] The perception device 200 can also include input devices and output devices, which are interconnected through a bus system and / or other forms of connection mechanism. It should be noted that, Figure 10 The components and structures of the perception device 200 shown are only exemplary and not limiting, and the perception device 200 can also have other components and structures as needed.

[0067] The input device can be a device used by a user to input instructions, and can include one or more of a keyboard, a mouse, a microphone, a touch screen and the like. In addition, the input device can also be any interface that receives information.

[0068] The output device can output various information (such as images or sounds) to the outside (such as a user), and can include one or more of a display, a speaker and the like. In addition, the output device can also be any other device with output function.

[0069] Exemplarily, the example perception apparatus 200 for implementing the perception method 200 according to the embodiments of the present application can be applied to terminal devices (such as mobile phones), tablet computers, notebook computers, ultra-mobile personal computers (UMPC), handheld computers, netbooks, personal digital assistants (PDA), wearable devices (such as smart watches, smart glasses, or smart helmets, etc.), augmented reality (AR), virtual reality (VR) devices, smart home devices, vehicle-mounted computers, and other electronic devices, and the embodiments of the present application do not make any limitation in this regard.

[0070] Those skilled in the art can understand the specific operations of the perception apparatus 200 for implementing the perception method 100 according to the embodiments of the present application in combination with the foregoing description, and for the sake of brevity, specific details are not described here, and only some main operations of the processor 210 are described.

[0071] In an embodiment of the present application, the executable program, when executed by the processor 210, causes the processor 210 to perform the following steps: Based on the cable strand segment solar radiation analysis model constructed by the finite element software, the distance of the cable strand cross-section temperature of the temperature reference cable strand segment decaying to the boundary along the axial direction is determined, and the effective length of the temperature reference cable strand segment is determined in combination with the length of the temperature sensor arrangement for sensing the temperature characteristics of the middle section of the temperature reference cable strand segment not affected by the boundary; after each temperature reference cable strand segment is arranged to a set height above each set node in the erected cable strand span, and after the erected cable strand is translated to the same region above the erected cable strand for a set length of time, the temperature data at the corresponding set nodes in the erected cable strand span is obtained based on the temperature sensors arranged in the middle section of each temperature reference cable strand segment; each segment formed based on each set node in the erected cable strand span is divided into a set number of small segments, the temperature of each small segment is determined based on the temperature data at the corresponding set nodes in the erected cable strand span, and the temperature distribution result of the erected cable strand is obtained by linear interpolation based on the temperature of all small segments.

[0072] The above exemplarily shows the perception method 100 according to the embodiments of the present application. The following describes the perception apparatus 200 for implementing the perception method 100 according to the embodiments of the present application in combination with the perception method 100. Figure 11 The computer device 300 provided by another aspect of the embodiments of the present application is described.

[0073] Reference Figure 11An example computer device 300 for implementing the sensing method according to the embodiments of the present application is described. The computer device 300 can include a cable segment effective length determination module 310, a to-be-erected cable node temperature acquisition module 320, and a to-be-erected cable temperature distribution acquisition module 330. Wherein: The cable segment effective length determination module 310 is configured to determine the distance of the cable cross-section temperature of the temperature reference cable segment decaying to the boundary along the axial direction based on the solar radiation analysis model of the cable segment constructed by the finite element software, and determine the effective length of the temperature reference cable segment in combination with the arrangement length of the temperature sensor for sensing the temperature characteristics of the middle section of the temperature reference cable segment not affected by the boundary.

[0074] The to-be-erected cable node temperature acquisition module 320 is configured to arrange each temperature reference cable segment to a set height above each set node in the erected cable span, and obtain the temperature data at the corresponding set node in the to-be-erected cable span based on the temperature sensor arranged in the middle section of each temperature reference cable segment after the to-be-erected cable is translated to the same region above the erected cable for a set length of time.

[0075] The to-be-erected cable temperature distribution acquisition module 330 is configured to divide each segment formed based on each set node in the to-be-erected cable span into a set number of small segments, determine the temperature of each small segment based on the temperature data at the corresponding set node in the to-be-erected cable span, and obtain the to-be-erected cable temperature distribution result by linear interpolation based on all small segment temperatures.

[0076] The computer device 300 according to the embodiments of the present application can perform cable linear adjustment without being limited to the environment with stable night temperature, and can realize linear control of the cable under any environmental temperature conditions.

[0077] Similarly, the sensing method 100 according to the embodiments of the present application is exemplarily shown above. Accordingly, the present application also provides a suspension bridge main cable temperature sensing system 400.

[0078] Reference Figure 12 and Figure 14 The sensing system 400 can include the following hardware devices and software platforms.

[0079] Specifically, the temperature reference cable segment 410 is arranged to a set height above each set node in the erected cable span 600.

[0080] The temperature sensor 420 is configured to sense the temperature characteristics of the middle section of the temperature reference cable segment 410 not affected by the boundary.

[0081] Data transceiver 430. The data transceiver 430 can adopt a wireless temperature data acquisition instrument, which can realize simultaneous acquisition and timed transmission of multiple groups of temperature data.

[0082] Processing terminal 440, the processing terminal 440 is built-in cable segment sunshine analysis model. The processing terminal 440 is used for the following operation: Based on the cable segment sunshine analysis model, the distance of the cable cross section temperature of the temperature reference cable segment decaying to the boundary along the axial direction is determined, and the effective length of the temperature reference cable segment is determined in combination with the length of the temperature sensor arrangement for sensing the temperature characteristics of the middle section of the temperature reference cable segment not affected by the boundary.

[0083] After each temperature reference cable segment is arranged to a set height above each set node in the erected cable span, and after the erected cable is translated to the same region (referring to the temperature reference cable segment) above the erected cable for a set time, the temperature data at the corresponding set node in the erected cable span is obtained based on the temperature sensor arranged in the middle section of each temperature reference cable segment.

[0084] Each segment formed based on each set node in the erected cable span is divided into a set number of small segments, the temperature of each small segment is determined based on the temperature data at the corresponding set node in the erected cable span, and the temperature distribution result of the erected cable is obtained by linear interpolation based on all small segment temperatures.

[0085] Since most of its related content has been recorded in the perception method 100, it will not be described again.

[0086] Among them, when the temperature reference cable segment is erected, there are mainly three principles: first, try to avoid interference with the on-site construction environment; second, try to be consistent with the erected cable (cable height, spatial attitude, linear, shielding condition, etc.); Third, follow-up, that is, the temperature reference cable segment follows the main cable movement, so that its movement trajectory remains consistent.

[0087] Therefore, when the temperature reference cable segment 410 is arranged, a set of cable clamping devices 450 is designed for each cable segment 410. As shown in Figure 13 The cable clamping device 450 has height and angle adjustment functions, so that the cable segment 410 can always remain consistent with the spatial attitude and linear of the erected cable. One end of the cable clamping device 450 is clamped to a set node in the erected cable 600 span, and the other end is clamped to the corresponding temperature reference cable segment 410. The cable clamping device 450 mainly includes four parts, as follows: Erected cable clamping fixture 451.

[0088] Temperature reference cable segment clamping fixture 452.

[0089] The first telescopic connecting rod 454 is connected to the temperature reference cable segment holder 452.

[0090] The second connecting rod 453 is adjustable in vertical angle. The upper and lower ends of the second connecting rod 453 are pivotally connected to the first connecting rod 454 and the erected cable holder 451 respectively.

[0091] Based on the above-mentioned suspension bridge main cable segment temperature sensing system 400, referring to Figure 15 The present application also provides a suspension bridge main cable segment temperature sensing method 500, which can include the following steps: At step S510, the effective length of each temperature reference cable segment at each set node in the erected cable span is determined in advance by processing the terminal cable segment sunshine analysis model. Then a suitable uniform length is selected.

[0092] At step S520, the temperature reference cable segment of the determined length is made, the cable segment cross section is consistent with the to-be-erected cable, the same steel wire size and number of wires are used. And the external thermistor temperature sensor and the internal thermistor temperature sensor are respectively preset on the periphery and the center of the middle section of the temperature reference cable segment which is not affected by the boundary.

[0093] For example, the cable (segment) cross section is a regular hexagonal shape when it leaves the factory. One cable segment cross section can be arranged with 7 temperature sensors, and the arrangement is shown in Figure 14 which includes 6 external thermistor temperature sensors uniformly arranged on the periphery of the middle section of the temperature reference cable segment which is not affected by the boundary and an internal thermistor temperature sensor arranged at the center of the middle section of the temperature reference cable segment which is not affected by the boundary.

[0094] At step S530, each temperature reference cable segment is installed at a set height above each set node in the erected cable span. Then after the to-be-erected cable is completed, the to-be-erected cable is translated to the same area above the erected cable and kept for a set period of time, so that the temperature change of the to-be-erected cable is consistent with that of the temperature reference cable segment.

[0095] At step S540, each temperature sensor collects the temperature data of the temperature reference cable segment at the corresponding position and transmits it to the processing terminal. Among them, the average value of the temperature values sensed by a plurality of temperature sensors at a certain time sequence is taken as the temperature data at the time sequence. Then, the temperature data (average temperature) of the cable segment at each set node is taken as the temperature data at each set node in the to-be-erected cable span.

[0096] At step S550, the processing terminal divides each segment formed based on each set node in the cable span to be erected into a set number of small segments. The temperature of each small segment is determined based on the temperature data at the corresponding set node in the cable span to be erected. The temperature distribution result of the cable span to be erected is obtained by linear interpolation based on the temperature of all small segments.

[0097] Since most of its relevant content has been recorded in the perception method 100, it will not be described again.

[0098] In addition, according to the embodiment of the present application, the present application also provides a storage medium, on which a computer program is stored, and the computer program is used to execute the corresponding steps of the perception method 100 of the embodiment of the present application when the computer program is run by a processor.

[0099] The storage medium may, for example, include a memory card of a smart phone, a storage component of a tablet computer, a hard disk of a personal computer, a read-only memory (ROM), an erasable programmable read-only memory (EPROM), a portable compact disc read-only memory (CD-ROM), a USB memory, or any combination of the above storage medium. The computer readable storage medium can be any combination of one or more computer readable storage media.

[0100] In addition, according to the embodiment of the present application, the present application also provides a computer program product, which includes computer instructions, and the computer instructions are executed by a processor to implement the steps of the perception method 100 of the embodiment of the present application.

[0101] Although the example embodiments have been described herein with reference to the accompanying drawings, it is to be understood that the above-described example embodiments are merely exemplary and are not intended to limit the scope of the present application. Those of ordinary skill in the art can make various changes and modifications without departing from the scope and spirit of the present application. All such changes and modifications are intended to be included within the scope of the present application as claimed in the appended claims.

[0102] Those of ordinary skill in the art can realize that the units and algorithm steps of the examples described in connection with the embodiments disclosed herein can be realized in electronic hardware, or a combination of computer software and electronic hardware. Whether the functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Those of ordinary skill in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the present application.

[0103] In several embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the above-described device embodiments are merely illustrative, and the division of the units is merely a logical function division. In actual implementation, another division manner can be used, for example, a plurality of units or components can be combined or integrated into another device, or some features can be omitted or not executed.

[0104] In addition, those skilled in the art can understand that although some embodiments described herein include certain features included in other embodiments but not other features, the combination of features of different embodiments means to be within the scope of the present application and form different embodiments. For example, in the claims, any one of the claimed embodiments can be used in any combination.

[0105] It should be noted that the above embodiments explain the present application but do not limit the present application, and those skilled in the art can design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs located between parentheses shall not constitute a limitation on the claims. The word "comprising" does not exclude the presence of elements or steps not listed in the claims. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The application can be implemented by means of both hardware and software, whether specifically mentioned or not. In a unit claim enumerating several means, the listed means can be embodied by one and the same item of hardware. The use of the words first, second and third, etc. does not imply any order. These words can be understood as names.

[0106] The above description is merely a specific implementation or explanation of the present application, and the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or replacements within the technical scope disclosed in the present application, which should be covered within the protection scope of the present application. The protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A method for sensing the temperature of the main cable strands of a suspension bridge, characterized in that, The sensing method includes: Based on the solar radiation analysis model of the cable strand segment constructed by finite element software, the distance at which the temperature of the cable cross section of the temperature reference cable strand segment decays along the axial direction to the boundary is determined. The effective length of the temperature reference cable strand segment is determined by combining the temperature sensor arrangement length for sensing the temperature characteristics of the intermediate section of the temperature reference cable strand segment that is not affected by the boundary. After each temperature reference cable segment is arranged at a set height above each set node in the span of the erected cable, and after the erected cable is moved to the same area above the erected cable for a set period of time, the temperature data at each set node in the span of the cable to be erected is obtained based on the temperature sensors arranged in the middle section of each temperature reference cable segment. The span of the cable strand to be erected is divided into a set number of segments based on each set node. The temperature of each segment is determined based on the temperature data at each set node in the span of the cable strand to be erected. The temperature distribution of the cable strand to be erected is obtained by linear interpolation based on the temperature of all segments.

2. The sensing method according to claim 1, characterized in that, The solar radiation analysis model for cable strand segments constructed based on finite element software determines the distance at which the temperature of the cable strand section decreases axially to the boundary, specifically: The initial temperature of the reference cable segment, the cross-sectional temperature of the cable segment after heating, the surface temperature of the cable segment after heating, the axial thermal conductivity coefficient of the cable segment, and the vertical thermal conductivity coefficient of the cable segment are input into the solar radiation analysis model of the cable segment to obtain the temperature distribution and axial attenuation law of the cable segment. Based on the temperature distribution and axial attenuation law of the cable strand segment, the distance from the boundary along the axial direction of the temperature at the cross section of the cable strand segment is determined.

3. The sensing method according to claim 1, characterized in that, The effective length of the temperature reference cable segment is obtained by combining the temperature sensor arrangement length with the temperature characteristics of the intermediate section of the temperature reference cable segment that is unaffected by the boundary. Specifically, this means: Temperature reference to the effective length of the strand segment ; in, It is the distance from which the temperature of the cable section segment referenced by the reference cable decays axially to the boundary. It is the length of the intermediate segment of the temperature reference cable segment that is unaffected by the boundary. The length of the temperature sensor arrangement shall not be less than the temperature characteristics of the intermediate section of the reference cable segment that is not affected by the boundary.

4. The sensing method according to claim 1, characterized in that, The determination of the temperature of each segment based on the temperature data at each designated node corresponding to the mid-span of the cable to be erected specifically includes: The node temperature of each small node used to divide the cable strand into segments is determined based on the temperature data at each set node in the middle of the cable strand to be erected. The average of the node temperatures of the two nodes corresponding to each segment is used as the temperature of each segment.

5. The sensing method according to claim 4, characterized in that, Assuming the exact midpoint of the node corresponding to the designated node in the span of the cable strand to be erected is the perpendicular point in the span, the span of the cable strand to be erected includes... Each segment is divided into 1 segment, and each segment is equally divided into 10 segments. A small segment, No. The first segment Node temperature of each small node , ； in, , , This indicates the numbering of the cable strands to be erected from left to right across the span, corresponding to the [number]. Temperature data at a set node; No. The first segment Temperature of each segment .

6. A temperature sensing device for the main cable strands of a suspension bridge, characterized in that, The sensing device includes: Memory is used to store executable instructions for a computer; A processor, when executing computer-executable instructions stored in the memory, implements the sensing method according to any one of claims 1 to 5.

7. A storage medium storing computer instructions, wherein, The computer instructions are used to cause the computer to perform the sensing method according to any one of claims 1 to 5.

8. A temperature sensing system for the main cable strands of a suspension bridge for implementing the sensing method as described in any one of claims 1 to 5, characterized in that, include: Temperature reference cable segments are used to be arranged at designated heights above each designated node in the middle of the erected cable span; Temperature sensor, used to sense the temperature characteristics of the intermediate section of the temperature reference cable segment that is unaffected by the boundary; Data transceiver; The processing terminal has a built-in solar radiation analysis model for cable segment, used for: Based on the solar radiation analysis model of the cable strand segment, the distance at which the temperature of the cable cross section of the temperature reference cable strand segment decays axially to the boundary is determined. Combined with the length of the temperature sensor arrangement used to sense the temperature characteristics of the intermediate section of the temperature reference cable strand segment that is not affected by the boundary, the effective length of the temperature reference cable strand segment is determined. After each temperature reference cable segment is arranged at a set height above each set node in the span of the erected cable, and after the erected cable is moved to the same area above the erected cable for a set period of time, the temperature data at each set node in the span of the cable to be erected is obtained based on the temperature sensors arranged in the middle section of each temperature reference cable segment. The span of the cable strand to be erected is divided into a set number of segments based on each set node. The temperature of each segment is determined based on the temperature data at each set node in the span of the cable strand to be erected. The temperature distribution of the cable strand to be erected is obtained by linear interpolation based on the temperature of all segments.

9. The sensing system according to claim 8, characterized in that, It also includes a cable strand clamping device for ensuring that the temperature reference cable strand segment and the erected cable strand maintain consistent spatial posture and alignment, and move accordingly. One end of the cable strand clamps to a designated node in the middle of the erected cable strand span, and the other end clamps to the corresponding temperature reference cable strand segment. Cable clamps and fixers have been installed; Temperature reference cable segment clamping and fixing device; A retractable first connecting rod is connected to the temperature reference cable segment clamping and fixing device; An adjustable vertical angle second connecting rod, the upper and lower ends of which are pivotally connected to the first connecting rod and the installed cable clamp fixing device, respectively; and / or The temperature sensor is a resistance temperature sensor, which includes an external resistance temperature sensor evenly spaced around the periphery of a section of the temperature reference cable segment that is unaffected by the boundary, and an internal resistance temperature sensor arranged at the center of the section of the temperature reference cable segment that is unaffected by the boundary.

10. A method for sensing the temperature of the main cable strands of a suspension bridge based on the sensing system as described in claim 8 or 9, characterized in that, Includes the following steps: The effective length of each temperature reference cable segment at each set node in the corresponding erected cable span is determined by the solar radiation analysis model of the cable segment processing terminal. Create temperature reference cable strand segments of a defined length. The cross-section of the cable strand segments should be consistent with that of the cable strands to be erected. Use the same steel wire size and number. Pre-install external and internal resistance temperature sensors on the periphery and center of the middle section, which is not affected by the boundary, respectively. Install the prepared temperature reference cable segments at the set heights above the set nodes in the span of the erected cable. After the erected cable is pulled, move the cable to be erected to the same area above the erected cable and keep it for a set time so that the temperature change of the cable to be erected is consistent with that of the temperature reference cable segment. Each temperature sensor collects temperature data of the reference cable segment at its corresponding location and transmits it to the processing terminal. The processing terminal divides each segment formed by each set node in the span of the cable to be erected into a set number of small segments. Based on the temperature data at each set node in the span of the cable to be erected, the temperature of each small segment is determined. Based on the temperature of all small segments, the temperature distribution of the cable to be erected is obtained by linear interpolation.

Images