Method and equipment for monitoring rock and soil displacement and computer storage medium

Abstract

The invention discloses a method and equipment for monitoring rock-soil displacement and a computer storage medium, and relates to the technical field of rock-soil engineering monitoring, and the method comprises the steps: obtaining parameters of a bidirectional rotation detection rod and a fiber bragg grating; according to the parameters, two-way rotating detection rods are manufactured, fiber bragg gratings are arranged, the multiple two-way rotating detection rods connected together in a serial mode and the fiber bragg gratings arranged on the surfaces of the two-way rotating detection rods form a rock-soil displacement detection structure, the rock-soil displacement detection structure is arranged on a rock-soil body to be detected, and the fiber bragg gratings are connected with a fiber bragg grating demodulator; capturing data acquired by the rock-soil displacement detection structure through a fiber bragg grating demodulator; by analyzing the obtained data and judging the displacement state of the rock-soil body, the deformation direction of the rock-soil body can be judged, the deformation of the rock-soil body can be monitored in multiple modes, and the method is suitable for multiple detection environments while the detection precision is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of geotechnical engineering monitoring, and in particular to a method, a device and a computer storage medium for monitoring geotechnical displacement. Background Art

[0002] In the field of geotechnical engineering, such as various types of building foundations, slopes, underground engineering projects, and other construction and operation processes, it is crucial to accurately monitor the deformation and displacement of rock and soil in real time. The main fiber Bragg grating monitoring technologies in the field of traditional geotechnical engineering safety monitoring are:

[0003] (1) Fiber Bragg gratings are symmetrically attached to the PPR pipe wall, and the soil displacement is monitored by using the synchronous deformation of the optical fiber and the pipe body;

[0004] (2) Implanting optical fibers into interception nets, anchor rods, etc. to form perceptible facilities using optical fiber strain detection;

[0005] (3) Use the temperature sensing function of optical fiber to monitor temperature changes and leak location in concrete and oil and gas pipelines;

[0006] (4) Lay the armored optical cable on the slope surface or bury it in the rock and soil through a groove to monitor the location and change trend of the deformation of the rock and soil.

[0007] The above method has the following shortcomings in engineering practice: (1) Since optical fiber can only sense tensile strain, it is subject to certain limitations in geotechnical monitoring scenarios; (2) Conventional fiber Bragg grating monitoring can accurately locate the spatial position of deformation, but cannot determine the direction of deformation. Summary of the Invention

[0008] The embodiment of the present invention provides a method for monitoring rock and soil displacement, which can not only determine the direction of rock and soil deformation, but also monitor the rock and soil deformation in multiple ways.

[0009] A device for monitoring bidirectional displacement of rock and soil using a grating fiber Bragg grating comprises: constructing an initial model of a bidirectional rotating detection rod, and arranging a fiber Bragg grating on the initial model, wherein the fiber Bragg grating comprises a straight segment and a spiral segment connected to each other, wherein the spiral segment is arranged at a rotation hinge of the bidirectional detection rod;

[0010] Using the acquired rock and soil parameters, the initial model and the parameters of the fiber Bragg grating are modified and the parameters are output, wherein the parameters of the fiber Bragg grating include the pitch and winding angle of the helical segment;

[0011] According to the above output parameters, a bidirectional rotation detection rod is manufactured and a fiber Bragg grating is arranged. A plurality of bidirectional rotation detection rods connected together in series and the fiber Bragg grating arranged on the surface of the rods constitute a rock displacement detection structure. The rock displacement detection structure is arranged on the rock and soil to be detected, and the fiber Bragg grating is connected to a fiber Bragg grating demodulator.

[0012] The data obtained from the geotechnical displacement detection structure is captured by a fiber Bragg grating interrogator;

[0013] By analyzing the acquired data, the displacement state of the rock and soil mass can be judged.

[0014] Furthermore, the bidirectional rotation detection rod includes a bidirectional connecting rod and standard rods hinged at both ends thereof, wherein the rotation directions of the standard rods at both ends of the bidirectional connecting rod are perpendicular to each other.

[0015] Furthermore, one end of the two-way connecting rod has a limiting groove a, and the other end has a limiting groove b with the same shape and size as the limiting groove a and perpendicular directions. The standard rods at both ends of the two-way connecting rod are respectively inserted into the limiting groove a and the limiting groove b and are hinged together with the two ends of the two-way connecting rod using a pin shaft.

[0016] Furthermore, the rock and soil displacement detection structure is arranged in the rock and soil body to be detected in a grid-like arrangement on the slope surface and in a vertical borehole.

[0017] Furthermore, the geotechnical displacement detection structure also needs to be calibrated. The calibration process includes the following steps:

[0018] Connecting both ends of the fiber Bragg grating of the rock and soil displacement detection structure to the fiber Bragg grating demodulator;

[0019] The signal obtained by the fiber Bragg grating demodulator is used to bind the rotation angle of the standard rod with the signal generated by the deformation of the fiber Bragg grating.

[0020] Furthermore, when a grid arrangement is adopted on the slope surface, the two-way connecting rods and the ground contact surface are further provided with anchors for connection with the slope.

[0021] Furthermore, the anchoring piece includes a connecting piece, wherein one end of the connecting piece is connected to the two-way connecting rod and the ground contact surface, and the anchoring section is detachably connected to the other end of the connecting piece.

[0022] Furthermore, the process of modifying the initial model and the parameters of the fiber Bragg grating using the acquired rock and soil parameters includes:

[0023] Establish bidirectional rotation detection rod and fiber Bragg grating parameter optimization model;

[0024] Using the acquired rock and soil parameters, the improved genetic algorithm is used to optimize the parameters of the bidirectional rotation detection rod and fiber Bragg grating.

[0025] After verifying and calibrating the obtained parameters, the parameters of the bidirectional rotation detection rod and the fiber Bragg grating are output.

[0026] A computer device includes: a memory and a processor, wherein the memory and the processor are communicatively connected to each other, the memory stores computer instructions, and the processor executes the above method by executing the computer instructions.

[0027] A computer-readable storage medium stores computer instructions, wherein the computer instructions are used to enable a computer to execute the above method.

[0028] The beneficial effects of the above technical solutions provided by the embodiments of the present invention include at least:

[0029] 1. The fiber Bragg grating tensile strain is converted into the angular change of a bidirectional rotating detection rod to realize the function of sensing the displacement of the rock and soil and the direction of displacement. By using standard rods hinged at 90 degrees to each other and fiber Bragg gratings that generate strain with the change of the angular position, the displacement of the rock and soil in the X, Y, and Z directions can be monitored through the position conversion of the bidirectional angular position.

[0030] 2. A rock and soil displacement detection structure is composed of a plurality of bidirectional rotating detection rods connected in series and a fiber optic Bragg grating arranged on the surface thereof. By arranging the rods in a grid pattern on the surface of the rock and soil slope, a three-dimensional monitoring of the slope surface deformation is achieved.

[0031] 3. A rock and soil displacement detection structure consisting of multiple bidirectional rotating detection rods connected in series and fiber Bragg gratings arranged on their surfaces adopts a vertical borehole arrangement to realize X and Y bidirectional horizontal displacement monitoring at different depths in the rock and soil hole.

[0032] Other features and advantages of the present invention will be described in the following description, and in part will become apparent from the description, or will be understood by practicing the present invention. The purposes and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the written description, claims, and drawings.

[0033] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0035] Figure 1 This is a flow chart of a method for monitoring rock and soil displacement disclosed in an embodiment of the present invention;

[0036] Figure 2 A schematic diagram of a rock and soil displacement detection structure disclosed in an embodiment of the present invention;

[0037] Figure 3 This is a schematic structural diagram of several bidirectional rotation detection rods connected in series according to an embodiment of the present invention.

[0038] Reference numerals:

[0039] 1. Bidirectional connecting rod; 11. Limiting groove a; 12. Limiting groove b; 2. Standard rod; 3. Anchor piece; 31. Connecting piece; 32. Anchoring section; 4. Fiber Bragg grating (FBG); 41. Helical section; 5. FBG demodulator. DETAILED DESCRIPTION

[0040] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0041] like Figure 2 and 3 As shown, the bidirectional rotation detection rod includes a bidirectional connecting rod 1 and a standard rod 2 hinged at both ends thereof. The rotation directions of the standard rods 2 at both ends of the bidirectional connecting rod 1 are perpendicular to each other, wherein one end of the bidirectional connecting rod 1 has a limiting groove a11, and the other end has a limiting groove b12 with the same shape and size as the limiting groove a11 and the directions perpendicular to each other. The standard rods 2 at both ends of the bidirectional connecting rod 1 are respectively inserted into the limiting groove a11 and the limiting groove b12 and are hinged together with the two ends of the bidirectional connecting rod 1 using a pin shaft.

[0042] The bidirectional connecting rod 1 has two limiting grooves with vertical opening directions. The limiting groove a11 and the limiting groove b12 can limit the rotation direction of the standard rod 2. Figure 2 Or 3 is a reference, a spatial rectangular coordinate system (x, y, z) is constructed in the figure. Due to the limitations of the limiting grooves a11 and b12, when multiple bidirectional connecting rods 1 are connected in series, under the action of external force, the bidirectional connecting rods 1 can move along the x-axis, y-axis and z-axis of the spatial rectangular coordinate system, thereby realizing displacement monitoring of the rock and soil in the X, Y and Z directions. Compared with conventional fiber grating 4 monitoring, it can more accurately locate the spatial position of the deformation and determine the direction of the deformation.

[0043] Figure 1The flowchart of the method for monitoring rock and soil displacement disclosed in an embodiment of the present invention is shown, which includes the following steps:

[0044] S1, construct an initial model of a bidirectional rotation detection rod, and arrange a fiber Bragg grating 4 on the initial model. The fiber Bragg grating 4 includes a straight section and a spiral section 41 connected to each other, wherein the spiral section 41 is arranged at the rotation hinge of the bidirectional detection rod.

[0045] When the fiber Bragg grating 4 is arranged in a spiral form at the rotation hinge of the bidirectional rotation detection rod, the fiber Bragg grating 4 and the bidirectional rotation detection rod form a larger contact area and a more uniform strain distribution. At the same time, when the bidirectional rotation detection rod is bent or twisted, the spiral structure disperses the local concentrated strain to a longer fiber Bragg grating 4 segment, thereby amplifying the strain response of the fiber Bragg grating 4.

[0046] For the same deformation, spiral winding can increase the optical fiber strain by 50%-100%.

[0047] Under a displacement of 0.1 mm, the strain of the traditional straight-line optical fiber is about 50 με, while that of the spirally wound one can reach 100-150 με.

[0048] In another embodiment, a pre-stretching strain of 0.1%-0.3% can be applied to the spirally arranged optical fiber Bragg grating 4 to put it in a tensioned state. The pre-stretching can eliminate the initial relaxation of the optical fiber Bragg grating 4 and improve its response ability to slight deformation. At the same time, the pre-stretching can also reduce the micro-bending loss of the optical fiber Bragg grating 4 and increase the signal strength by 10%-20%.

[0049] S2, using the acquired rock and soil parameters, modify the initial model and the parameters of the fiber Bragg grating 4, and output the parameters, wherein the parameters of the fiber Bragg grating 4 include the pitch and winding angle of the helical segment 41.

[0050] The process of modifying the initial model and the parameters of the fiber Bragg grating 4 using the acquired rock and soil parameters includes:

[0051] S21, obtaining rock and soil parameters;

[0052] include:

[0053] 1. On-site survey: Use geological radar, borehole sampling and other methods to obtain the elastic modulus E, Poisson's ratio v, internal friction angle φ, and density ρ of the rock and soil.

[0054] Through the wave velocity test (longitudinal wave velocity V p , shear wave velocity V s )Calculate the dynamic elastic modulus:

[0055]

[0056] 2. Parameter standardization: normalize the parameters to eliminate dimensional differences

[0057]

[0058] S22, establishing a four-parameter optimization model of a bidirectional rotation detection rod and a fiber Bragg grating;

[0059] Establishing the parameter optimization model of the bidirectional rotation detection rod includes:

[0060] 1. Determination of the length L of the bidirectional rotation detection rod:

[0061] According to the monitoring accuracy J and the deformation characteristics of the rock and soil, the length L of the bidirectional rotation detection rod is determined:

[0062]

[0063] Among them, k L is the empirical coefficient (usually 0.5 to 0.1), and g is the acceleration due to gravity.

[0064] 2. Optimization of the diameter d of the bidirectional rotating detection rod:

[0065] Based on the rock soil shear modulus G and the bidirectional rotation detection rod stiffness matching:

[0066]

[0067] Where K is the hinge stiffness, Establishing a 4-parameter optimization model for fiber Bragg gratings includes:

[0068] 1. Mapping formula of pitch p:

[0069] Based on the stiffness and deformation characteristics of rock and soil, the pitch and elastic modulus E and Poisson's ratio v are:

[0070]

[0071] Among them, k1, c1, and γ are empirical coefficients fitted by experimental data, and v is the Poisson's ratio of the rock and soil.

[0072] 2. Mapping formula of winding angle θ:

[0073] The internal friction angle θ affects the shear deformation mode, and the winding angle needs to match the shear characteristics of the rock and soil:

[0074]

[0075] k2 is the coefficient calibrated by rock and soil shear test.

[0076] S23, using the acquired rock and soil parameters, an improved genetic algorithm is used to optimize the parameters of the bidirectional rotation detection rod and the fiber Bragg grating 4;

[0077] include:

[0078] 1. Define the comprehensive optimization objective function

[0079] Strain transfer efficiency η:

[0080]

[0081] Goal: Make η close to the preset value η target (usually 0.6-0.9), where E f is the elastic modulus of fiber Bragg grating 4, E s is the elastic modulus of the bidirectional rotation detection rod, v s Poisson's ratio of the bidirectional rotation detection rod

[0082] Strain magnification factor α:

[0083]

[0084] Goal: Make α≈2 to ensure effective amplification of the strain signal.

[0085] Comprehensive objective function:

[0086]

[0087] λ and μ are regularization coefficients, which balance the weights.

[0088] 2. Implement improved genetic algorithm optimization

[0089] Initialize the population:

[0090] Randomly generate N groups (L, d, p, L) and uniformly distribute them within the constraints.

[0091] Fitness calculation:

[0092] The objective function value is calculated for each individual, and the smaller the value, the higher the fitness.

[0093] Select an action:

[0094] The roulette wheel method is used to select individuals with high fitness, and the retention rate is set to the top 50%.

[0095] Crossover and mutation:

[0096] Arithmetic crossover: The offspring parameters are the weighted average of the parent parameters, for example: p child =0.7p parent1 +0.3p parent2

[0097] Gaussian mutation: Add random perturbations to the parameters with a probability of 5% and a perturbation amplitude of 5% of the range

[0098] Iteration termination condition

[0099] Maximum number of iterations: 100 generations.

[0100] Convergence threshold: fitness change rate < 0.1%.

[0101] S24, after verifying and calibrating the obtained parameters, the parameters of the bidirectional rotation detection rod and the fiber Bragg grating 4 are output.

[0102] Finite element analysis was used to simulate the strain distribution under different (L, d, p, θ) combinations to verify the optimization results. A simulated rock and soil body was constructed in the laboratory, and the optimized strain transfer efficiency η and amplification factor α were measured to adjust the empirical coefficients k1 and k2.

[0103] S3. According to the above-mentioned output parameters, a bidirectional rotation detection rod is manufactured and a fiber Bragg grating 4 is arranged. A plurality of bidirectional rotation detection rods connected in series and the fiber Bragg grating 4 arranged on their surface constitute a rock and soil displacement detection structure. The rock and soil displacement detection structure is arranged on the rock and soil body to be detected, and the fiber Bragg grating 4 is connected to the fiber Bragg grating demodulator 5.

[0104] The forms of arranging the rock and soil displacement detection structure in the rock and soil body to be detected include a grid arrangement on the slope surface and an arrangement in a vertical drill hole.

[0105] like Figure 2 As shown, when a grid arrangement is adopted on the slope surface, the two-way connecting rod 1 and the ground contact surface are further provided with anchors 3 for connecting with the slope.

[0106] The anchor 3 includes a connecting piece 31 , one end of which is connected to the two-way connecting rod 1 and the ground contact surface, and the anchoring section 32 is detachably connected to the other end of the connecting piece 31 .

[0107] The geotechnical displacement detection structure also requires parameter calibration. The calibration process includes the following steps:

[0108] S31, connecting the two ends of the fiber Bragg grating 4 of the rock and soil displacement detection structure to the fiber Bragg grating demodulator 5;

[0109] S32 , using the signal obtained by the fiber Bragg grating demodulator 5 , the rotation angle of the standard rod 2 is bound to the signal generated by the deformation of the fiber Bragg grating 4 .

[0110] The purpose of the parameter calibration is to obtain the rotation angle of each position of the bidirectional rotation detection rod when the signal generated by the deformation of the fiber grating 4 is identified by signal binding.

[0111] S4, capturing data obtained by the rock and soil displacement detection structure through the fiber Bragg grating demodulator 5.

[0112] S5, by analyzing the acquired data, the displacement state of the rock and soil mass is judged.

[0113] The analysis process includes:

[0114] By using parameter calibration, the rotation angle of each position of the bidirectional rotation detection rod in the fiber Bragg grating 4 signal change area is obtained;

[0115] The rotation angle of each position of the bidirectional rotating detection rod is used to calculate the corresponding deformation amount and deformation direction of the rock and soil mass;

[0116] The above data are compared with the preset threshold value to identify the deformation state of the rock and soil mass.

[0117] A computer device includes: a memory and a processor, wherein the memory and the processor are communicatively connected to each other, the memory stores computer instructions, and the processor executes the above method by executing the computer instructions.

[0118] A computer-readable storage medium stores computer instructions, wherein the computer instructions are used to enable a computer to execute the above method.

[0119] It should be understood that the specific order or hierarchy of steps in the disclosed processes is an example of an exemplary method. Based on design preferences, it should be understood that the specific order or hierarchy of steps in the process can be rearranged without departing from the scope of the present disclosure. The accompanying method claims present elements of the various steps in an exemplary order and are not intended to be limited to the specific order or hierarchy described.

[0120] In the foregoing detailed description, various features are grouped together in a single embodiment to simplify the disclosure. This method of disclosure should not be interpreted as reflecting an intention that embodiments of the claimed subject matter require more features than are expressly recited in each claim. On the contrary, as reflected in the appended claims, the invention comprises less than all the features of any individual disclosed embodiment. The appended claims are therefore hereby expressly incorporated into the detailed description, with each claim standing on its own as a separate preferred embodiment of the invention.

[0121] Those skilled in the art will also appreciate that the various illustrative logic blocks, modules, circuits, and algorithmic steps described in conjunction with the embodiments herein may be implemented as electronic hardware, computer software, or a combination thereof. In order to clearly illustrate the interchangeability between hardware and software, the various illustrative components, blocks, modules, circuits, and steps described above are generally described around their functions. Whether such functions are implemented as hardware or software depends on the specific application and the design constraints imposed on the entire system. A skilled person may implement the described functions in an adaptable manner for each specific application, but such implementation decisions should not be interpreted as departing from the scope of protection of this disclosure.

[0122] The steps of the methods or algorithms described in conjunction with the embodiments herein may be directly embodied as hardware, software modules executed by a processor, or a combination thereof. The software module may be located in a RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, register, hard disk, removable disk, CD-ROM, or any other form of storage medium well known in the art. An exemplary storage medium is connected to the processor so that the processor can read information from the storage medium and write information to the storage medium. Of course, the storage medium may also be an integral part of the processor. The processor and storage medium may be located in an ASIC. The ASIC may be located in a user terminal. Of course, the processor and storage medium may also be present in a user terminal as discrete components.

[0123] For software implementation, the techniques described in this application can be implemented using modules (e.g., procedures, functions, etc.) that perform the functions described in this application. These software codes can be stored in a memory unit and executed by a processor. The memory unit can be implemented within the processor or external to the processor. In the latter case, it is communicatively coupled to the processor via various means, which are well known in the art.

[0124] The foregoing description includes examples of one or more embodiments. Of course, it is not possible to describe all possible combinations of components or methods for the purposes of describing the above embodiments, but one of ordinary skill in the art will recognize that the various embodiments may be further combined and arranged. Therefore, the embodiments described herein are intended to encompass all such changes, modifications and variations that fall within the scope of the appended claims. Furthermore, to the extent that the term "comprising" is used in the specification or claims, the term is intended to be encompassed in a manner similar to the term "including," as explained in terms of "including," used as a transitional word in the claims. Furthermore, any use of the term "or" in the specification of the claims is intended to mean a "non-exclusive or."

Claims

1. A method for monitoring rock and soil displacement, characterized in that: include: An initial model of a bidirectional rotation detection rod is constructed, and a fiber Bragg grating (4) is arranged on the initial model, wherein the fiber Bragg grating (4) includes a straight section and a spiral section (41) connected to each other, wherein the spiral section (41) is arranged at a rotation hinge of the bidirectional detection rod; Using the acquired rock and soil parameters, the initial model and the parameters of the fiber Bragg grating (4) are modified and the parameters are output, wherein the parameters of the fiber Bragg grating (4) include the pitch and winding angle of the helical segment (41); According to the above output parameters, a bidirectional rotation detection rod is manufactured and a fiber Bragg grating (4) is arranged. A plurality of bidirectional rotation detection rods connected in series and the fiber Bragg grating (4) arranged on the surface of the rods constitute a rock displacement detection structure. The rock displacement detection structure is arranged on the rock and soil body to be detected, and the fiber Bragg grating (4) is connected to a fiber Bragg grating demodulator (5). Capturing data obtained from the rock and soil displacement detection structure through a fiber Bragg grating demodulator (5); By analyzing the acquired data, the displacement state of the rock and soil mass can be judged.

2. The method according to claim 1, wherein The bidirectional rotation detection rod comprises a bidirectional connecting rod (1) and standard rods (2) hinged at both ends thereof, wherein the rotation directions of the standard rods (2) at both ends of the bidirectional connecting rod (1) are perpendicular to each other.

3. The method according to claim 2, wherein in, One end of the bidirectional connecting rod (1) has a limiting groove a (11), and the other end has a limiting groove b (12) with the same shape and size as the limiting groove a (11) and perpendicular directions. The standard rods (2) at both ends of the bidirectional connecting rod (1) are respectively inserted into the limiting groove a (11) and the limiting groove b (12) and are hinged to the two ends of the bidirectional connecting rod (1) by using a pin shaft.

4. The method according to claim 2, wherein The forms of arranging the rock and soil displacement detection structure in the rock and soil body to be detected include a grid arrangement on the slope surface and an arrangement in a vertical drill hole.

5. The method according to claim 3, wherein The geotechnical displacement detection structure also requires parameter calibration. The calibration process includes the following steps: Connecting both ends of the fiber Bragg grating (4) of the rock and soil displacement detection structure to the fiber Bragg grating demodulator (5); The signal obtained by the fiber Bragg grating demodulator (5) is used to bind the rotation angle of the standard rod (2) and the signal generated by the deformation of the fiber Bragg grating (4).

6. The method according to claim 4, wherein When a grid-like arrangement is adopted on the slope surface, the two-way connecting rod (1) is further provided with an anchor piece (3) on the ground contact surface for connection with the slope.

7. The method according to claim 6, wherein The anchoring piece (3) comprises a connecting piece (31), wherein one end of the connecting piece (31) is connected to the two-way connecting rod (1) and the ground contact surface, and the anchoring section (32) is detachably connected to the other end of the connecting piece (31).

8. The method according to claim 1, wherein The process of modifying the parameters of the initial model and the fiber Bragg grating (4) using the acquired rock and soil parameters includes: Establishing the parameter optimization model of bidirectional rotating detection rod and fiber Bragg grating (4); Using the acquired rock and soil parameters, the improved genetic algorithm is used to optimize the parameters of the bidirectional rotation detection rod and the fiber Bragg grating (4); After verifying and calibrating the obtained parameters, the parameters of the bidirectional rotation detection rod and the fiber grating (4) are output.

9. A computer device, characterized in that: include: A memory and a processor, wherein the memory and the processor are communicatively connected to each other, the memory stores computer instructions, and the processor executes the method according to any one of claims 1 to 8 by executing the computer instructions.

10. A computer-readable storage medium, characterized in that The computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a computer to execute the method according to any one of claims 1 to 8.

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