Aqueduct deformation real-time monitoring device, method, system and electronic equipment

Abstract

The present invention discloses a device, method, system, and electronic device for real-time monitoring of aqueduct deformation, relating to the field of water conservancy projects. The device comprises: an optical fiber fixture fixedly mounted on the lower surface of the aqueduct, the optical fiber fixture having a curvature consistent with that of the lower surface; the optical fiber fixture for evenly distributing optical fibers along a preset interval on the lower surface of the aqueduct; and a data acquisition device connected to the optical fibers. The data acquisition device is configured to receive optical signals transmitted by the optical fibers, determine the frequency shift of the optical fibers based on the optical signals, and determine the aqueduct deformation distribution based on the frequency shift of the optical fibers. The present invention can monitor aqueduct structural deformation in real time, dynamically assess the safety status of the aqueduct, and provide assurance for its safe operation.

Description

Technical Field

[0001] The present invention relates to the field of water conservancy projects, and in particular to a device, method, system and electronic equipment for real-time monitoring of aqueduct deformation. Background Art

[0002] As an important water conveyance structure in water conservancy projects, aqueducts have been widely used in recent years with the construction of water diversion projects and large and medium-sized irrigation areas. Due to the large size of aqueducts and the complex stress conditions, the safety of their construction and operation has received widespread attention. As a large-span hydraulic structure, the current deformation monitoring of aqueducts is mostly point measurement, and sensors or observation points are arranged at typical locations for regular monitoring. Manual observation is carried out by arranging leveling points on the top, but the observation frequency is low, and the observation process has certain safety hazards. This method of monitoring the location has certain limitations, and it is impossible to monitor the deformation of the aqueduct body in real time, and to dynamically evaluate the safe operation status of the aqueduct. Therefore, a method is needed to monitor the deformation of the aqueduct structure in real time to provide guarantees for the safe operation of the aqueduct. Summary of the Invention

[0003] The purpose of the present invention is to provide a device, method, system and electronic equipment for real-time monitoring of aqueduct deformation, which can monitor the deformation of the aqueduct structure in real time and provide guarantee for the safe operation of the aqueduct.

[0004] To achieve the above object, the present invention provides the following solutions:

[0005] A real-time monitoring device for aqueduct deformation, comprising an optical cable fixing device and a collection device;

[0006] The optical fiber fixing device is fixedly arranged on the lower surface of the aqueduct and the curvature of the optical fiber fixing device is consistent with that of the lower surface of the aqueduct; the optical fiber fixing device is used to evenly arrange the optical fibers along a preset interval on the lower surface of the aqueduct;

[0007] The acquisition device is connected to the optical fiber; the acquisition device is used to receive the optical signal transmitted by the optical fiber, and determine the frequency shift of the optical fiber according to the optical signal, and determine the deformation distribution of the aqueduct according to the frequency shift of the optical fiber.

[0008] Optionally, the optical fiber fixing device includes a plurality of fixed frame structures connected in sequence; the fixed frame structures are connected in sequence to a first arc frame, a second arc frame, a third arc frame and a fourth arc frame;

[0009] The directions of the first arc frame and the third arc frame are consistent with the axial direction of the arc of the lower surface of the aqueduct; the directions of the second arc frame and the fourth arc frame are consistent with the radial direction of the arc of the lower surface of the aqueduct;

[0010] One end of the first arc frame is connected to one end of the second arc frame; the other end of the second arc frame is connected to one end of the third arc frame; the other end of the third arc frame is connected to one end of the fourth arc frame;

[0011] The projection of the first arc frame on the axial section of the aqueduct is perpendicular to the projection of the second arc frame on the axial section of the aqueduct; the projection of the third arc frame on the axial section of the aqueduct is perpendicular to the projection of the fourth arc frame on the axial section of the aqueduct; the projection of the first arc frame on the axial section of the aqueduct is perpendicular to the projection of the fourth arc frame on the axial section of the aqueduct; the projection of the second arc frame on the axial section of the aqueduct is perpendicular to the projection of the third arc frame on the axial section of the aqueduct.

[0012] Optionally, the optical fiber is arranged along the first arc-shaped frame, the second arc-shaped frame, the third arc-shaped frame and the fourth arc-shaped frame.

[0013] Optionally, the acquisition device includes an optical time domain analyzer and a communication conversion interface;

[0014] The communication conversion interface is connected to the optical fiber and the optical time domain analyzer respectively; the communication conversion interface is used to convert the optical signal transmitted by the optical fiber into a preset signal type, and transmit the converted optical signal to the optical time domain analyzer.

[0015] The optical time domain analyzer is used to determine the frequency shift of the optical fiber according to the converted optical signal, and to determine the deformation distribution of the aqueduct according to the frequency shift of the optical fiber.

[0016] A method for real-time monitoring of aqueduct deformation is applied to the above-mentioned real-time monitoring device for aqueduct deformation, the method comprising:

[0017] Obtaining frequency shifts of monitoring optical fibers at multiple monitoring points of the aqueduct; the frequency shifts of the monitoring optical fibers include a first frequency shift at a previous moment and a second frequency shift at a current moment;

[0018] Determining a frequency shift change of the monitoring optical fiber according to the first frequency shift amount and the second frequency shift amount;

[0019] According to the linear relationship between Brillouin frequency shift and aqueduct strain, the aqueduct frequency shift deformation at each monitoring point is obtained;

[0020] Obtaining the actual deformation value of each monitoring point according to the aqueduct frequency shift deformation value and the volume deformation value at each monitoring point;

[0021] Based on the fact that the deformation of the aqueduct is parabolic, the deformation distribution of the aqueduct is determined according to the frequency shift variation of the monitoring optical fiber and the frequency shift deformation of the aqueduct.

[0022] Optionally, obtaining the aqueduct frequency shift deformation at each monitoring point based on the linear relationship between the Brillouin frequency shift and the aqueduct strain specifically includes:

[0023] Obtain the optical fiber frequency shift at each monitoring point of the aqueduct within a set time period;

[0024] Determining an average frequency shift according to the optical fiber frequency shifts at each of the monitoring points;

[0025] Based on the linear relationship between the Brillouin frequency shift and the aqueduct strain, determining the relationship function between the average frequency shift and the deformation;

[0026] According to the relationship function, the frequency shift deformation of the aqueduct is determined.

[0027] Optionally, the method further includes:

[0028] Determine the early warning indicators of aqueduct deformation based on the designed tensile strength and elastic modulus of the reinforced concrete of the aqueduct;

[0029] When the deformation of the aqueduct monitoring point exceeds the early warning index, an alarm signal is issued.

[0030] A real-time monitoring system for aqueduct deformation is applied to the above-mentioned real-time monitoring method for aqueduct deformation, and the system comprises:

[0031] An acquisition module is used to acquire the monitoring optical fiber frequency shifts of multiple monitoring points of the aqueduct; the monitoring optical fiber frequency shifts include a first frequency shift at a previous moment and a second frequency shift at a current moment;

[0032] a change amount determination module, configured to determine a change amount of the monitoring optical fiber frequency shift according to the first frequency shift amount and the second frequency shift amount;

[0033] The deformation determination module is used to obtain the aqueduct frequency shift deformation at each monitoring point based on the linear relationship between the Brillouin frequency shift and the aqueduct strain;

[0034] an actual deformation determination module, configured to obtain the actual deformation of each monitoring point according to the aqueduct frequency shift deformation and the volume deformation value at each monitoring point;

[0035] The deformation determination module is used to determine the deformation distribution of the aqueduct based on the parabolic deformation of the aqueduct and the frequency shift change of the monitoring optical fiber and the frequency shift deformation of the aqueduct.

[0036] An electronic device includes a memory and a processor, wherein the memory is used to store a computer program, and the processor runs the computer program to enable the electronic device to execute the above-mentioned real-time monitoring method for aqueduct deformation.

[0037] Optionally, the memory is a readable storage medium.

[0038] According to the specific embodiments provided by the present invention, the present invention discloses the following technical effects:

[0039] The present invention provides a real-time monitoring device for aqueduct deformation, comprising: an optical fiber fixing device fixedly arranged on the lower surface of the aqueduct and having the same curvature as that of the lower surface of the aqueduct; the optical fiber fixing device being used to evenly arrange the optical fiber along a preset interval on the lower surface of the aqueduct; an acquisition device connected to the optical fiber; the acquisition device being used to receive an optical signal transmitted by the optical fiber, and to determine a frequency shift of the optical fiber based on the optical signal, and to determine a deformation distribution of the aqueduct based on the frequency shift of the optical fiber, thereby achieving the purpose of real-time monitoring of the deformation of the aqueduct structure and providing a guarantee for the safe operation of the aqueduct. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0041] Figure 1 A flowchart of a method for real-time monitoring of aqueduct deformation provided by an embodiment of the present invention;

[0042] Figure 2 A module diagram of a real-time monitoring system for aqueduct deformation provided by an embodiment of the present invention;

[0043] Figure 3 Schematic diagram of optical fiber arrangement of the present invention;

[0044] Figure 4 This is a schematic diagram of the spontaneous Brillouin scattering principle of the present invention;

[0045] Figure 5 This is a schematic diagram of optical fiber frequency shift according to the present invention;

[0046] Figure 6 Schematic diagram of the collection device of the present invention;

[0047] Figure 7 This is a schematic diagram of the equally spaced optical fibers arrangement of the present invention.

[0048] Explanation of symbols:

[0049] Acquisition module—1, change determination module—2, shape determination module—3, actual shape determination module—4, deformation determination module—5. DETAILED DESCRIPTION

[0050] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0051] The purpose of the present invention is to provide a device, method, system and electronic equipment for real-time monitoring of aqueduct deformation, which can monitor the deformation of the aqueduct structure in real time and provide guarantee for the safe operation of the aqueduct.

[0052] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0053] Example 1

[0054] like Figure 3 As shown, the present invention provides a device for real-time monitoring of aqueduct deformation, which includes: an optical cable fixing device and a collection device.

[0055] The optical fiber fixing device is fixedly arranged on the lower surface of the aqueduct and has the same curvature as that of the lower surface of the aqueduct; the optical fiber fixing device is used to evenly arrange the optical fibers along a preset interval on the lower surface of the aqueduct.

[0056] The acquisition device is connected to the optical fiber; the acquisition device is used to receive the optical signal transmitted by the optical fiber, and determine the frequency shift of the optical fiber according to the optical signal, and determine the deformation distribution of the aqueduct according to the frequency shift of the optical fiber.

[0057] Specifically, the optical fiber fixing device includes a plurality of fixed frame structures connected in sequence; the fixed frame structures are a first arc-shaped frame, a second arc-shaped frame, a third arc-shaped frame and a fourth arc-shaped frame connected in sequence.

[0058] The directions of the first arc frame and the third arc frame are consistent with the axial direction of the arc of the lower surface of the aqueduct; the directions of the second arc frame and the fourth arc frame are consistent with the radial direction of the arc of the lower surface of the aqueduct.

[0059] One end of the first arc frame is connected to one end of the second arc frame; the other end of the second arc frame is connected to one end of the third arc frame; and the other end of the third arc frame is connected to one end of the fourth arc frame.

[0060] The projection of the first arc frame on the axial section of the aqueduct is perpendicular to the projection of the second arc frame on the axial section of the aqueduct; the projection of the third arc frame on the axial section of the aqueduct is perpendicular to the projection of the fourth arc frame on the axial section of the aqueduct; the projection of the first arc frame on the axial section of the aqueduct is perpendicular to the projection of the fourth arc frame on the axial section of the aqueduct; the projection of the second arc frame on the axial section of the aqueduct is perpendicular to the projection of the third arc frame on the axial section of the aqueduct.

[0061] Furthermore, the optical fibers are arranged along the first arc-shaped frame, the second arc-shaped frame, the third arc-shaped frame and the fourth arc-shaped frame.

[0062] In addition, the acquisition device includes an optical time domain analyzer and a communication conversion interface.

[0063] The communication conversion interface is connected to the optical fiber and the optical time domain analyzer, respectively; the communication conversion interface is used to convert the optical signal transmitted by the optical fiber into a predetermined signal type and transmit the converted optical signal to the optical time domain analyzer. Specifically, the communication conversion interface is a fiber optic patch cord extending from the optical time domain analyzer.

[0064] The optical time domain analyzer is used to determine the frequency shift of the optical fiber according to the converted optical signal, and to determine the deformation distribution of the aqueduct according to the frequency shift of the optical fiber.

[0065] In actual applications, the optical fiber is a Brillouin distributed optical fiber, and the optical time-domain analyzer is a Brillouin optical time-domain analyzer. The optical fibers are arranged linearly at the bottom of the aqueduct before it is cast. The Brillouin optical time-domain analyzer can display the deformation of a specific location or the entire aqueduct in real time based on the changes in the optical fiber frequency shift.

[0066] As a specific embodiment, the data collection device further includes a display; the display is used to display the deformation of a certain position or the entire aqueduct body. In addition, setting a threshold value on the display can also provide real-time warnings.

[0067] Furthermore, the acquisition device also includes a power supply device; the power supply device is used to supply power to the optical time domain analyzer, the communication conversion interface and the display.

[0068] As a specific embodiment, the acquisition device also includes a shell; wherein, the display is located on the upper surface of the shell, and the functional personnel can directly obtain the data of the display; the optical time domain analyzer and the power supply device are arranged inside the shell; and the communication conversion interface is arranged on the side of the shell.

[0069] In practical applications, such as Figure 6As shown, this device mainly includes a U-shaped fixed frame structure, which is used to fix the distributed optical fiber to ensure that the optical fiber collects data at a specific interval, and the measurement point spacing is 1m. The optical fiber extension frame is arranged in a bidirectional cross-section to ensure that there is an optical cable passing through the trunk of each frame, which can continuously monitor the deformation of the trough body. The distributed optical fiber is first grooved on the surface of the aqueduct concrete with a size of 10mm×5mm (depth×width). After the groove is cut, the debris in the groove is removed to ensure the coordinated deformation of the optical fiber and the concrete structure; then the distributed optical fiber is embedded in the groove and fixed in the groove with strong glue at a spacing of 1m to ensure that the optical fiber is in a tensioned state; then epoxy resin glue is injected into the groove with a glue gun to ensure that the optical fiber is fully adhered to the aqueduct structure; finally, cloth-based tape is pasted on the outside of the groove to ensure the optical fiber layout effect. The optical fiber led out at one end of the aqueduct is arranged with an optical fiber collection device to collect and analyze monitoring data.

[0070] As a specific implementation method, Figure 7 As shown in the figure, the straight line where the arrow is located is the layout position of the optical fiber, and points A, B, C, D, E, F, G and H are the positions where the optical fiber layout direction is inconsistent with the fixed frame structure, that is, the direction of the optical fiber changes at these points. Figure 7 In the figure, the line with an arrow is the laid optical fiber, and the direction of the arrow represents the transmission direction of the optical signal on the optical fiber. The frame where points A and B and the extended parts of points A and B in the fixed frame structure are located is the second arc frame; the fixed frame structure part where the optical fiber between the collection device and point A is located is the first arc frame; if the intersection of the extended parts of points A and B and the extended parts of points D and E is point I, then the fixed frame structure part where points I and D are located is the third arc frame; the fixed frame structure part where points D and C and the extended parts of points D and C are located is the fourth arc frame, and the other end of the fourth arc frame is connected to the other end of the first arc frame in the next fixed frame structure.

[0071] As a specific implementation method, Figure 7 As shown in the figure, the length of the optical fiber between the acquisition device and point A is 1 meter. Figure 7 The length of the optical fiber between the two arrowed points and in the axial direction of the aqueduct is 1 meter. In the figure, L refers to the length of the fixed frame structure. In this embodiment, L represents a length of 1 meter, which means that the length of each arc-shaped frame in the fixed frame structure that is in the same direction as L is 1 meter. Specifically, the length of the optical fiber between points B and C, points D and E, and points F and G is 1 meter. In the fixed frame structure portion perpendicular to the axial direction of the aqueduct, the lengths of the arcs between points B and A, points D and C, points E and F, and points G and H are half the length of the arc on the lower surface of the aqueduct.

[0072] Example 2

[0073] like Figure 1 As shown, the present invention provides a method for real-time monitoring of aqueduct deformation, the method comprising:

[0074] Step S1: Obtaining the monitoring optical fiber frequency shifts of multiple monitoring points of the aqueduct; the monitoring optical fiber frequency shifts include a first frequency shift at a previous moment and a second frequency shift at a current moment.

[0075] Step S2: determining a frequency shift variation of the monitoring optical fiber according to the first frequency shift and the second frequency shift.

[0076] Step S3: According to the linear relationship between the Brillouin frequency shift and the aqueduct strain, the aqueduct frequency shift deformation at each monitoring point is obtained.

[0077] Specifically, if Figure 4 and Figure 5 As shown in the figure, when light waves enter the medium, they are scattered by the acoustic field grating. The scattered light has a frequency shift related to the speed of sound due to the Doppler effect. This scattered light with frequency shift is called spontaneous abyss scattered light. Figure 4 In the figure, V1, V2 and V3 refer to different frequency shifted optical fibers.

[0078] S3 specifically includes:

[0079] Step S31: Obtain the optical fiber frequency shift of each monitoring point of the aqueduct within a set time period.

[0080] Step S32: determining an average frequency shift according to the optical fiber frequency shift at each monitoring point.

[0081] Step S33: Based on the linear relationship between the Brillouin frequency shift and the aqueduct strain, a relationship function between the average frequency shift and the deformation is determined.

[0082] Step S34: Determine the frequency shift deformation of the aqueduct according to the relationship function. Specifically, the frequency shift deformation of the aqueduct is:

[0083]

[0084] Among them, L i represents the deformation of the aqueduct at time i, is the change in optical fiber frequency shift within a set time period, d is the length of the monitoring optical fiber, and k is the linear relationship coefficient between the Brillouin frequency shift and the aqueduct strain.

[0085] Step S4: obtaining the actual deformation value of each monitoring point according to the aqueduct frequency shift deformation value and the volume deformation value of each monitoring point;

[0086] Step S5: Based on the fact that the deformation of the aqueduct is parabolic, the deformation distribution of the aqueduct is determined according to the frequency shift variation of the monitoring optical fiber and the frequency shift deformation of the aqueduct.

[0087] In addition, the real-time monitoring method for aqueduct deformation provided by the present invention further includes:

[0088] According to the design tensile strength and elastic modulus of the reinforced concrete of the aqueduct, the early warning indicators of aqueduct deformation are determined.

[0089] When the deformation of the aqueduct monitoring point exceeds the early warning index, an alarm signal is issued.

[0090] Specifically, the early warning indicators are:

[0091]

[0092] Among them, σ s The reinforced concrete used for pouring the aqueduct has a designed allowable tensile strength, E s is the elastic modulus when the reinforcement is fixed, and ε' is the early warning indicator.

[0093] The present invention determines the deformation of each monitoring point when water is flowing by obtaining the second frequency shift of the monitoring optical fiber when water is flowing in real time and the initial first frequency shift of the monitoring optical fiber obtained when water is not flowing, thereby achieving the purpose of real-time monitoring of the deformation of the aqueduct structure and providing protection for the safe operation of the aqueduct.

[0094] Example 3

[0095] This embodiment provides a method for calculating aqueduct deformation based on optical fiber technology, which mainly includes two parts. The first part is a method for calculating strain based on optical fiber frequency shift, which is described in detail as follows:

[0096] Assume that there are n monitoring points on the optical fiber, P i,j Indicates the frequency shift value of monitoring sample point j at time i, P i+1,j Indicates the frequency shift value of monitoring point j at time i+1. The change in fiber frequency shift within the set time period is The average value of the optical fiber frequency shift variation is used to characterize the deformation degree of each part of the aqueduct, and the formula is:

[0097]

[0098] Where, The change in optical fiber frequency shift within a set time period can well reflect the degree of deformation of each part of the aqueduct.

[0099] According to the linear relationship between Brillouin frequency shift and aqueduct strain, the strain-frequency shift relationship can be deduced as follows:

[0100]

[0101] Where k is the coefficient of the linear relationship between the Brillouin frequency shift and the aqueduct strain, and Δε is the strain change within the set time period.

[0102] Strain is the relative deformation caused by external changes at a certain moment relative to the previous moment, so the formula is:

[0103]

[0104] Where ε is the strain of the aqueduct with length L, ΔL is the length increment of the monitoring optical fiber, and L is the length of the monitoring optical fiber.

[0105] Substituting formula (3) into (2), the formula for the frequency shift deformation of the aqueduct is:

[0106]

[0107] Among them, L i represents the deformation of the aqueduct at time i, and d is the length of the monitoring optical fiber.

[0108] Because the aqueduct is a concrete structure, concrete undergoes autogenous volumetric deformation due to temperature. Therefore, a stress-free gauge is installed in each section to monitor autogenous volumetric deformation. The deformation at a single fiber-optic monitoring point is subtracted from the autogenous volumetric deformation to obtain the actual deformation value at that point.

[0109] The second part is the calculation method of the strain of the entire tank body, which is described as follows:

[0110] Assuming the deformation of the aqueduct is parabolic, the equation is

[0111] y=ax 2 +b (5)

[0112] y is the deformation of each point within the aqueduct deformation region, a is the quadratic coefficient of the curve, and c is the constant term of the curve, whose value is equal to the maximum vertical settlement of the aqueduct. When water flows through the aqueduct, settlement deformation occurs. The optical fiber will have a length increment ΔL within the deformation region (L1, L2). Its value is the arc length S after the optical fiber changes from a horizontal straight line to a parabola minus the original straight line length L2-L1. The arc length of the parabola can be calculated using the arc length formula. Using this relationship, we can get:

[0113]

[0114] L=(L2-L1) / 2 (7)

[0115]

[0116]

[0117] Where y' is the first derivative of y, L is the monitoring fiber length, ΔL is the monitoring fiber length increment, Δd is the interval fiber length increment, ε i is the strain within the interval.

[0118] Solving equation (9) we can get the quadratic coefficient a of the parabola and the constant term b = aL 2 , thereby determining the shape of the parabola and then the deformation distribution of the aqueduct body.

[0119] In addition, the reinforced concrete used in the aqueduct has a design allowable tensile strength σ s , and when the reinforcement is fixed, its elastic modulus E can be obtained s Therefore, according to the formula, the early warning index of aqueduct deformation at a single measuring point can be formulated.

[0120]

[0121] Among them, ε' is the early warning indicator.

[0122] Example 4

[0123] In order to execute the method corresponding to the above embodiment 1 and achieve the corresponding functions and technical effects, a real-time monitoring system for aqueduct deformation is provided below. Figure 2 As shown, the system includes:

[0124] The acquisition module 1 is used to obtain the monitoring optical fiber frequency shift of multiple monitoring points of the aqueduct; the monitoring optical fiber frequency shift includes the first frequency shift at the previous moment and the second frequency shift at the current moment.

[0125] The variation determination module 2 is configured to determine the variation of the frequency shift of the monitoring optical fiber according to the first frequency shift and the second frequency shift.

[0126] The deformation determination module 3 is used to obtain the aqueduct frequency shift deformation of each monitoring point according to the linear relationship between the Brillouin frequency shift and the aqueduct strain.

[0127] The actual deformation determination module 4 is configured to obtain the actual deformation of each monitoring point according to the aqueduct frequency shift deformation and the volume deformation value at each monitoring point.

[0128] The deformation determination module 5 is used to determine the deformation distribution of the aqueduct based on the parabolic deformation of the aqueduct and the frequency shift change of the monitoring optical fiber and the frequency shift deformation of the aqueduct.

[0129] Example 5

[0130] An embodiment of the present invention provides an electronic device, including a memory and a processor, wherein the memory is used to store a computer program, and the processor runs the computer program to enable the electronic device to execute the real-time monitoring method for aqueduct deformation of embodiment 1.

[0131] Optionally, the above-mentioned electronic device may be a server.

[0132] In addition, an embodiment of the present invention further provides a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the method for real-time monitoring of aqueduct deformation of the first embodiment.

[0133] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. Reference can be made to the common and similar parts between the various embodiments. For the systems disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple, and the relevant parts can be referred to the method description.

[0134] This document uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims

1. A real-time monitoring device for aqueduct deformation, characterized in that: The device includes an optical fiber fixing device and a collection device; The optical fiber fixing device is fixedly arranged on the lower surface of the aqueduct and has the same curvature as that of the lower surface of the aqueduct; the optical fiber fixing device is used to evenly arrange the optical fibers along a preset interval on the lower surface of the aqueduct; The acquisition device is connected to the optical fiber; the acquisition device is used to receive the optical signal transmitted by the optical fiber, and determine the frequency shift of the optical fiber according to the optical signal, and determine the deformation distribution of the aqueduct according to the frequency shift of the optical fiber; The acquisition device includes an optical time domain analyzer and a communication conversion interface; The communication conversion interface is connected to the optical fiber and the optical time domain analyzer respectively; the communication conversion interface is used to convert the optical signal transmitted by the optical fiber into a preset signal type and transmit the converted optical signal to the optical time domain analyzer; The optical time domain analyzer is used to determine the frequency shift of the optical fiber according to the converted optical signal, and to determine the deformation distribution of the aqueduct according to the frequency shift of the optical fiber; The optical time domain analyzer is specifically used for: Obtaining frequency shifts of monitoring optical fibers at multiple monitoring points of the aqueduct; the frequency shifts of the monitoring optical fibers include a first frequency shift at a previous moment and a second frequency shift at a current moment; Determining a frequency shift change of the monitoring optical fiber according to the first frequency shift amount and the second frequency shift amount; According to the linear relationship between the Brillouin frequency shift and the aqueduct strain, the aqueduct frequency shift deformation at each monitoring point is obtained; specifically, the aqueduct frequency shift deformation is: Among them, L i represents the deformation of the aqueduct at time i, is the change in optical fiber frequency shift within a set time period, d is the length of the monitoring optical fiber, and k is the linear relationship coefficient between the Brillouin frequency shift and the aqueduct strain; According to the frequency shift deformation and volume deformation value of the aqueduct at each monitoring point, the actual deformation of each monitoring point is obtained; Based on the deformation of the aqueduct being parabolic, determining the deformation distribution of the aqueduct according to the frequency shift variation of the monitoring optical fiber and the frequency shift deformation of the aqueduct; Determine the early warning indicators of aqueduct deformation based on the designed tensile strength and elastic modulus of the reinforced concrete of the aqueduct; When the deformation of the aqueduct monitoring point exceeds the warning index, an alarm signal is issued; specifically, the warning index is: Among them, σ s The reinforced concrete used for pouring the aqueduct has a designed allowable tensile strength, E s is the elastic modulus when the reinforcement is fixed, and ε' is the early warning indicator.

2. The aqueduct deformation real-time monitoring device according to claim 1, characterized in that: The optical fiber fixing device comprises a plurality of fixed frame structures connected in sequence; the fixed frame structures are connected in sequence to a first arc frame, a second arc frame, a third arc frame and a fourth arc frame; The directions of the first arc frame and the third arc frame are consistent with the axial direction of the arc of the lower surface of the aqueduct; the directions of the second arc frame and the fourth arc frame are consistent with the radial direction of the arc of the lower surface of the aqueduct; One end of the first arc frame is connected to one end of the second arc frame; the other end of the second arc frame is connected to one end of the third arc frame; the other end of the third arc frame is connected to one end of the fourth arc frame; The projection of the first arc frame on the axial section of the aqueduct is perpendicular to the projection of the second arc frame on the axial section of the aqueduct; the projection of the third arc frame on the axial section of the aqueduct is perpendicular to the projection of the fourth arc frame on the axial section of the aqueduct; the projection of the first arc frame on the axial section of the aqueduct is perpendicular to the projection of the fourth arc frame on the axial section of the aqueduct; the projection of the second arc frame on the axial section of the aqueduct is perpendicular to the projection of the third arc frame on the axial section of the aqueduct.

3. The aqueduct deformation real-time monitoring device according to claim 2, characterized in that: The optical fibers are arranged along the first arc-shaped frame, the second arc-shaped frame, the third arc-shaped frame, and the fourth arc-shaped frame.

4. A method for real-time monitoring of aqueduct deformation, characterized in that: The device for real-time monitoring of aqueduct deformation according to any one of claims 1 to 3, wherein the method comprises: Obtaining frequency shifts of monitoring optical fibers at multiple monitoring points of the aqueduct; the frequency shifts of the monitoring optical fibers include a first frequency shift at a previous moment and a second frequency shift at a current moment; Determining a frequency shift change of the monitoring optical fiber according to the first frequency shift amount and the second frequency shift amount; According to the linear relationship between Brillouin frequency shift and aqueduct strain, the aqueduct frequency shift deformation at each monitoring point is obtained; Obtaining the actual deformation value of each monitoring point according to the aqueduct frequency shift deformation value and the volume deformation value at each monitoring point; Based on the fact that the deformation of the aqueduct is parabolic, the deformation distribution of the aqueduct is determined according to the frequency shift variation of the monitoring optical fiber and the frequency shift deformation of the aqueduct.

5. The method for real-time monitoring of aqueduct deformation according to claim 4, characterized in that: The linear relationship between the Brillouin frequency shift and the aqueduct strain is used to obtain the aqueduct frequency shift deformation at each monitoring point, specifically including: Obtain the optical fiber frequency shift at each monitoring point of the aqueduct within a set time period; Determining an average frequency shift according to the optical fiber frequency shifts at each of the monitoring points; Based on the linear relationship between the Brillouin frequency shift and the aqueduct strain, determining the relationship function between the average frequency shift and the deformation; According to the relationship function, the frequency shift deformation of the aqueduct is determined.

6. The method for real-time monitoring of aqueduct deformation according to claim 4, characterized in that: The method further comprises: Determine the early warning indicators of aqueduct deformation based on the designed tensile strength and elastic modulus of the reinforced concrete of the aqueduct; When the deformation of the aqueduct monitoring point exceeds the early warning index, an alarm signal is issued.

7. A real-time monitoring system for aqueduct deformation, characterized in that: The method for real-time monitoring of aqueduct deformation according to any one of claims 4 to 6, wherein the system comprises: An acquisition module is used to acquire the monitoring optical fiber frequency shifts of multiple monitoring points of the aqueduct; the monitoring optical fiber frequency shifts include a first frequency shift at a previous moment and a second frequency shift at a current moment; a change amount determination module, configured to determine a change amount of the monitoring optical fiber frequency shift according to the first frequency shift amount and the second frequency shift amount; The deformation determination module is used to obtain the aqueduct frequency shift deformation at each monitoring point based on the linear relationship between the Brillouin frequency shift and the aqueduct strain; an actual deformation determination module, configured to obtain the actual deformation of each monitoring point according to the aqueduct frequency shift deformation and the volume deformation value at each monitoring point; The deformation determination module is used to determine the deformation distribution of the aqueduct based on the parabolic deformation of the aqueduct and the frequency shift change of the monitoring optical fiber and the frequency shift deformation of the aqueduct.

8. An electronic device, characterized in that: The electronic device comprises a memory and a processor, wherein the memory is used to store a computer program, and the processor runs the computer program to enable the electronic device to perform the method for real-time monitoring of aqueduct deformation according to any one of claims 4 to 6.

9. The electronic device according to claim 8, characterized in that: The memory is a readable storage medium.

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