Self-adhesive distributed optical fiber sensor construction system and construction method

Abstract

The invention relates to a self-adhesive distributed optical fiber sensor construction system and method, and the system comprises a self-adhesive distributed optical fiber sensor which is provided with an adhesive material layer and an adhesive material protection layer; the sensor protection layer is used for covering the self-adhesive distributed optical fiber sensor; the pre-tensioning optical fiber laying device comprises a main body support and a stripping mechanism which is installed on the main body support and is used for stripping an adhesive material protection layer; the first laying mechanism is used for applying pre-tensioning force to the self-adhesion distributed optical fiber sensor and adhering and fixing the self-adhesion distributed optical fiber sensor to a detected structure; and the second laying mechanism is used for laying a sensor protection layer on the surface of the self-adhesive distributed optical fiber sensor which is adhered and fixed to the detected structure. According to the invention, a manual gluing link is omitted through self-adhesion design, so that the laying efficiency is remarkably improved; and the measurement range is expanded to compressive strain through pre-tensioning force control, the monitoring precision is improved, and the method is particularly suitable for long-term health monitoring of large civil engineering structures such as bridges and tunnels.

Description

Technical Field

[0001] This invention relates to the field of civil engineering health monitoring technology, and in particular to health monitoring of civil engineering structural strain and vibration measurement, specifically to a self-adhesive distributed optical fiber sensor construction system and construction method. Background Technology

[0002] Distributed fiber optic sensing technology is a continuous monitoring technology that uses optical fiber as the transmission medium and sensing element, enabling continuous measurement of physical quantities such as temperature, strain, and sound waves over distances of hundreds of kilometers. This technology boasts advantages such as long-distance monitoring, high spatial resolution, resistance to electromagnetic interference, and corrosion resistance, and has been widely applied in the health monitoring of large-scale civil engineering structures such as bridges, tunnels, and dams. However, the deployment of existing fiber optic sensors in civil engineering projects faces numerous challenges:

[0003] First, the deployment efficiency is low: the current mainstream methods for deploying fiber optic sensors include manual pasting, mechanical fixing and pre-embedding. These methods are cumbersome and time-consuming, and it is difficult to ensure the straightness and uniformity of the fiber optic deployment, resulting in insufficient accuracy of monitoring data.

[0004] Secondly, poor pretension control: the lack of professional deployment tools makes it impossible to accurately control the fiber optic pretension, resulting in a limited measurement range, making it difficult to accurately monitor compressive strain, and failing to meet the needs of large-scale engineering applications.

[0005] In addition, there is insufficient durability: Civil engineering structures are exposed to harsh environments such as high temperature, humidity and vibration for a long time. The packaging materials of traditional fiber optic sensors are prone to aging and failure, which leads to a decline in sensor performance or complete failure.

[0006] Therefore, designing a systematic solution that integrates sensors and deployment tools is of great significance for promoting the engineering application of distributed fiber optic sensing technology. Summary of the Invention

[0007] In view of the shortcomings of the prior art, the main purpose of this invention is to provide a self-adhesive distributed optical fiber sensor construction system and construction method, which aims to solve the problems of low efficiency, poor pre-tension control accuracy and insufficient long-term durability of traditional optical fiber sensors during the deployment process.

[0008] The technical solution of the present invention is as follows:

[0009] This invention proposes a self-adhesive distributed optical fiber sensor construction system, comprising:

[0010] A self-adhesive distributed optical fiber sensor has an adhesive material layer and an adhesive material protective layer covering the adhesive material layer.

[0011] A sensor protective layer is used to cover the outer surface of the self-adhesive distributed optical fiber sensor after it has been attached to the structure under test.

[0012] A pre-tensioned optical fiber deployment device includes a main support frame and components mounted on the main support frame:

[0013] A peeling mechanism for peeling off the adhesive material protective layer to expose the adhesive material layer;

[0014] The first deployment mechanism is used to apply a pre-tension force to the self-adhesive distributed optical fiber sensor and to attach and fix the self-adhesive distributed optical fiber sensor to the structure being measured.

[0015] The second deployment mechanism is used to deploy the sensor protective layer on the outer surface of the self-adhesive distributed optical fiber sensor that is pasted and fixed to the structure under test.

[0016] Preferably, the self-adhesive distributed optical fiber sensor includes:

[0017] The distributed optical fiber sensing unit is composed of multiple strands of composite optical fibers arranged side by side to form a flat strip structure;

[0018] The self-adhesive layer comprises the adhesive material layer and the adhesive material protective layer covering it, wherein the adhesive material layer is pressed and fixed along the length direction of the flat strip structure.

[0019] Preferably, each composite optical fiber consists of a single-core optical fiber, a tight-buffered layer, and a composite armor layer from the inside out, and the outer periphery of the multiple composite optical fibers is covered with an optical fiber protective layer.

[0020] Preferably, the first deployment mechanism includes the self-adhesive distributed optical fiber sensor passing through the following sequentially:

[0021] The guide wheel assembly, mounted on the main support, is used to guide the deployment path of the self-adhesive distributed optical fiber sensor;

[0022] The tensioning wheel, located between the guide wheel groups, integrates a constant torque control motor to provide constant pretension force to the self-adhesive distributed optical fiber sensor.

[0023] The first clamping wheel is mounted below the main support via a first spring connecting rod, and is used to press and adhere the self-adhesive distributed optical fiber sensor to the surface of the structure being measured.

[0024] Preferably, the guide wheel assembly includes a first guide wheel and a second guide wheel. The first guide wheel is located upstream of the tensioning wheel along the layout path and is used to guide the self-adhesive distributed optical fiber sensor to the tensioning wheel. The second guide wheel is located downstream of the tensioning wheel along the layout path and is used to guide the self-adhesive distributed optical fiber sensor to the first pressure wheel.

[0025] Preferably, the first deployment mechanism further includes an optical fiber unwinding mechanism, which is installed on the main support or set on a mobile platform or support base, for winding and releasing the self-adhesive distributed optical fiber sensor.

[0026] Preferably, the peeling mechanism includes an adhesive material protective layer peeling wheel with an integrated control motor, located downstream of the guide wheel group along the layout path and adjacent to the first pressing wheel, for peeling off the adhesive material protective layer before the self-adhesive distributed optical fiber sensor is pressed.

[0027] Preferably, the second deployment mechanism includes:

[0028] A sensor protective layer unwinding mechanism is detachably mounted on the main support for winding and unwinding the sensor protective layer;

[0029] The second clamping wheel is installed below the main support via a second spring connecting rod and is located behind the first clamping wheel in the direction of its placement. It is used to press the released sensor protective layer onto the outer surface of the self-adhesive distributed optical fiber sensor.

[0030] Preferably, the main support includes a mounting frame and a connecting rod; wherein the mounting frame is used to mount the peeling mechanism, the first laying mechanism and the second laying mechanism, and the connecting rod is disposed at the bottom of the mounting frame for connecting the first laying mechanism and the second laying mechanism.

[0031] This invention also proposes a construction method for the above-mentioned self-adhesive distributed optical fiber sensor construction system, comprising the following steps:

[0032] The self-adhesive distributed optical fiber sensor is passed sequentially through the guide wheel group and tension wheel of the first deployment mechanism, and the required pre-tension force is set on the tension wheel in advance.

[0033] The peeling mechanism is activated to automatically roll up the adhesive material protective layer, exposing the adhesive material layer on the self-adhesive distributed fiber optic sensor.

[0034] The self-adhesive distributed optical fiber sensor with the adhesive material layer exposed is passed through the first clamping wheel, and its starting end is attached to the surface of the structure being measured using the adhesive material layer.

[0035] The pre-tensioned fiber optic deployment device is pushed so that the first clamping wheel continuously presses the self-adhesive distributed fiber optic sensor onto the structure surface, while the tensioning wheel maintains a constant pre-tension force.

[0036] The second deployment mechanism is activated simultaneously to draw the sensor protective layer from the unwinding mechanism and press it onto the outer surface of the deployed self-adhesive distributed optical fiber sensor using the second clamping roller.

[0037] The advantages of this invention compared to existing technologies are as follows: This invention proposes a self-adhesive distributed optical fiber sensor construction system. This system achieves efficient and accurate deployment of optical fiber sensors through integrated design, eliminating cumbersome fixing methods such as manual gluing and mechanical fixation. At the same time, it applies a constant and controllable pre-tension force to the optical fiber, enabling the optical fiber sensor to effectively monitor compressive strain while maintaining tensile strain monitoring capabilities. This broadens the application scope of distributed optical fibers in structural health monitoring, and is particularly suitable for strain and vibration monitoring of large-scale civil engineering structures such as bridges and tunnels. It is of great significance for promoting the widespread application of distributed optical fiber sensing technology in civil engineering.

[0038] This invention integrates an adhesive material layer and an adhesive material protective layer on a self-adhesive distributed optical fiber sensor, allowing the self-adhesive distributed optical fiber sensor to be directly attached and fixed to the structure being measured using its own adhesive material layer. This eliminates the tedious process of applying glue and curing on-site, realizing the sensor's "peel-and-stick" capability, greatly improving deployment efficiency, and is particularly suitable for large-scale, long-distance engineering applications such as bridges and tunnels.

[0039] This invention applies a precise and controllable pre-tension force to the self-adhesive distributed optical fiber sensor while simultaneously deploying it using a first deployment mechanism. This effectively extends the sensor's measurement range from tensile strain to compressive strain, thereby comprehensively improving the accuracy and engineering applicability of the monitoring data.

[0040] This invention uses a second deployment mechanism to cover the outer surface of the already attached self-adhesive distributed optical fiber sensor with a sensor protective layer, achieving the dual functions of mechanical protection and environmental isolation. This significantly improves the sensor's impact resistance, corrosion resistance, and long-term monitoring reliability, extending its service life in harsh environments in construction projects.

[0041] It should be understood that the description in the Summary of the Invention is not intended to limit the key or essential features of the embodiments of the present invention, nor is it intended to restrict the scope of the invention. Other features of the invention will become readily apparent from the following description. Furthermore, implementation of any embodiment of the present invention does not imply the simultaneous possession or achievement of multiple or all of the aforementioned beneficial effects. Attached Figure Description

[0042] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0043] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the conditions under which the present invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0044] Figure 1 This is a schematic diagram of the overall structure of the self-adhesive distributed optical fiber sensor construction system according to some embodiments of the present invention;

[0045] Figure 2 This is a schematic diagram of the overall structure of a self-adhesive distributed optical fiber sensor according to some embodiments of the present invention;

[0046] Figure 3 This is a flowchart illustrating the construction method of a self-adhesive distributed optical fiber sensor construction system according to some embodiments of the present invention.

[0047] Marked in the image:

[0048] 1-Self-adhesive distributed optical fiber sensor; 101-Distributed optical fiber sensing unit; 1011-Single-core optical fiber; 1012-Tight-buffered layer; 1013-Composite armor layer; 1014-Optical fiber protective layer; 102-Self-adhesive layer; 1021-Adhesive material layer; 1022-Adhesive material protective layer;

[0049] 2- Sensor protective layer;

[0050] 3-Main support frame; 301-Mounting frame; 302-Connecting rod; 303-Extension connection component;

[0051] 4- Peeling mechanism; 401- Adhesive material protective layer peeling wheel;

[0052] 5-First deployment mechanism; 501-First guide wheel; 502-Second guide wheel; 503-Tension wheel; 504-First pressure wheel; 505-First spring connecting rod; 506-Fiber optic unwinding mechanism;

[0053] 6-Second deployment mechanism; 601-Sensor protective layer unwinding mechanism; 602-Second clamping roller; 603-Second spring connecting rod;

[0054] 7-The structure under test.

[0055] The same or corresponding marks in the diagram indicate the same or corresponding parts. Detailed Implementation

[0056] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. Here, the illustrative embodiments and descriptions of the present invention are used to explain the present invention, but are not intended to limit the present invention.

[0057] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0058] It should be understood that the terms "comprising / including," "consisting of," or any other variations are intended to cover non-exclusive inclusion, such that a product, apparatus, process, or method that comprises a list of elements includes not only those elements but may also include, where necessary, other elements not expressly listed, or elements inherent to such a product, apparatus, process, or method. Without further limitation, an element defined by the phrases "comprising / including," "consisting of," does not exclude the presence of additional identical elements in the product, apparatus, process, or method that includes said element.

[0059] It should also be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device, component or structure referred to must have a specific orientation, be constructed or operated in a specific orientation, and should not be construed as a limitation of the present invention.

[0060] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0061] This invention proposes a self-adhesive distributed optical fiber sensor construction system. This system uses self-adhesive technology, which can quickly and conveniently fix the sensor to the surface or interior of concrete or steel structures. It is also equipped with a pre-tensioned optical fiber deployment device to achieve precise deployment of the optical fiber sensor, effectively solving the problems of low deployment efficiency and poor performance of traditional optical fiber sensors.

[0062] The implementation of the present invention will be described in detail below with reference to preferred embodiments.

[0063] like Figure 1 As shown, this invention proposes a self-adhesive distributed optical fiber sensor construction system, including a self-adhesive distributed optical fiber sensor 1, a sensor protective layer 2, and a pre-tensioned optical fiber deployment device. This construction system, by employing an integrated self-adhesive distributed optical fiber sensor and a pre-tensioned optical fiber deployment device specifically designed for the self-adhesive distributed optical fiber sensor 1, eliminates cumbersome fixing methods such as manual adhesive application and mechanical fixation, achieving efficient and precise adhesion of the optical fiber to the structural surface, and enabling the application of a constant and controllable pre-tension force to the optical fiber.

[0064] In implementation, the self-adhesive distributed fiber optic sensor 1 can be manufactured in roll form, facilitating large-scale deployment. See also... Figure 2 The self-adhesive distributed optical fiber sensor 1 adopts a multi-layer composite structure design, consisting of a distributed optical fiber sensing unit 101 and a self-adhesive layer 102.

[0065] The distributed optical fiber sensing unit 101 is composed of multiple strands of composite optical fibers arranged side by side to form a flat strip structure. Its flat shape works synergistically with the self-adhesive layer 102, which not only enhances the initial adhesion and long-term bonding reliability, but also better conforms to irregular curved surfaces such as concrete and steel structures, reducing the risk of slippage caused by vibration or temperature changes.

[0066] In some embodiments, the distributed optical fiber sensing unit 101 includes multiple strands of composite durable optical fiber arranged side by side. Each optical fiber includes, from the inside out, a single-core optical fiber 1011, a tight-buffered layer 1012, and a composite armor layer 1013. The outer periphery of the multiple strands of composite optical fiber is covered with an optical fiber protective layer 1014, which aims to improve bonding strength, durability, and resistance to environmental interference.

[0067] In this invention, this multi-layer composite design achieves multiple advantages through structural innovation: the single-core optical fiber 1011 ensures signal transmission accuracy, the tight-buffered layer 1012 provides micro-bending buffer protection, the composite armor layer 1013 enhances tensile strength and compressive strength, and the outer optical fiber protective layer 1014 forms a corrosion-resistant barrier; the multi-strand flat structure not only significantly increases the contact area with the self-adhesive layer and improves bonding reliability, but also improves the system's fault tolerance through redundant design, so that the monitoring function can still be maintained even if a single optical fiber is damaged.

[0068] In one specific embodiment, the single-core optical fiber 1011 is preferably a single-mode optical fiber. Single-mode optical fiber can transmit optical signals efficiently and is extremely sensitive to strain changes, accurately sensing strain changes caused by external environmental factors, providing a reliable basis for subsequent data monitoring and analysis.

[0069] The tight-buffered layer 1012 is made of polyimide or acrylic resin. Both materials have excellent physical properties and play a crucial role in buffering and fixing in the optical fiber structure. When the optical fiber is subjected to external impact or vibration, the tight-buffered layer can effectively absorb energy and reduce damage to the optical fiber; at the same time, it can also prevent the optical fiber from shifting, ensuring the stability of the optical fiber transmission performance.

[0070] The composite armor layer 1013 is woven from stainless steel or aramid fiber. Stainless steel is characterized by its high strength, high hardness, and good corrosion resistance, while aramid fiber is known for its excellent tensile strength and toughness. The composite armor layer formed by combining these two materials provides the entire optical fiber structure with strong mechanical strength and excellent tensile properties, effectively resisting external mechanical forces such as compression and stretching, ensuring the safe operation of the optical fiber in complex and harsh environments.

[0071] The fiber optic protective layer 1014 is made of polyvinyl chloride or polyethylene. Both materials possess excellent corrosion resistance, resisting the erosion of various chemicals, effectively extending the service life of the fiber optic cable, and ensuring that the fiber optic cable maintains good performance in various harsh chemical environments. Multiple optical fibers are bonded side-by-side through the fiber optic protective layer 1014 to form a flat ribbon structure, the width of which can be adjusted according to application requirements.

[0072] See also Figure 2 The self-adhesive layer 102 consists of an adhesive material layer 1021 and an adhesive material protective layer 1022. The adhesive material layer 1021 is a strong rubber adhesive pressed onto the bonding side of the distributed optical fiber sensing unit 101. This layer has excellent bonding strength and durability, enabling the distributed optical fiber sensing unit 101 to be quickly bonded to the surface or interior of the structure being tested (concrete structure, steel structure surface or interior). The adhesive material protective layer 1022 is a polyethylene film, bonded to the outside of the adhesive material layer 1021, serving to protect the adhesive material layer 1021.

[0073] Specifically, the adhesive material layer 1021 is attached to the adhesive side of the distributed optical fiber sensing unit 101 by a pressing process, and the adhesive material protective layer 1022 is covered on the adhesive material layer 1021 by light pressing to prevent the adhesive material layer 1021 from being contaminated or failing during storage and transportation.

[0074] The adhesive layer 1021 uses a high-strength rubber adhesive (such as silicone-based or acrylic pressure-sensitive adhesive), with a thickness of about 0.2-0.5mm. It has excellent initial tack and long-lasting adhesion, and can be quickly cured on concrete or steel structure surfaces.

[0075] The adhesive protective layer 1022 is a polyethylene film with a thickness of approximately 0.1 mm, which is applied to the adhesive layer 1021 by light pressure. When using the self-adhesive distributed fiber optic sensor 1, it is only necessary to peel off the adhesive protective layer 1022, press the adhesive layer 1021 directly onto the surface of the structure 7 being measured, and apply slight pressure to complete the fixation. No additional adhesive or mechanical fastening is required, achieving rapid deployment with "peel and stick".

[0076] In the technical solution constructed by the present invention, the sensor protective layer 2 and the pre-tensioned optical fiber deployment device work together and complement each other to provide a solid guarantee for the stable deployment and reliable application of the self-adhesive distributed optical fiber sensor 1.

[0077] The sensor protective layer 2 is applied to the outer surface of the self-adhesive distributed optical fiber sensor 1 after it is attached to the structure under test 7 by the pre-tensioned optical fiber deployment device, forming a secondary protective layer for the distributed optical fiber sensing unit 101, thereby enhancing its resistance to mechanical shock and environmental isolation.

[0078] In some embodiments, the sensor protective layer 2 is a high-performance polymer film (such as polyurethane) with a high-strength rubber adhesive pressed onto its inner side.

[0079] In this invention, the sensor protective layer 2 is a high-performance polymer protective layer added to the outside of the self-adhesive distributed optical fiber sensor 1 after it is attached to the surface of the structure under test 7. The inner side of the protective layer is pressed with a high-strength rubber adhesive, which can provide mechanical protection and environmental isolation.

[0080] See also Figure 1 The pre-tensioned optical fiber deployment device mainly consists of a main support 3 and a stripping mechanism 4, a first deployment mechanism 5, and a second deployment mechanism 6 installed on the main support 3. Under the support and coordination of the main support 3, each mechanism completes a series of deployment operations in an orderly manner.

[0081] In this invention, the peeling mechanism 4 is used to peel off the adhesive material protective layer 1022, exposing the adhesive material layer 1021. The first placement mechanism 5 is used to apply pre-tension to the self-adhesive distributed fiber optic sensor 1 and attach it to the structure under test 7. The second placement mechanism 6 is used to place the sensor protective layer 2 on the outer surface of the self-adhesive distributed fiber optic sensor 1 attached to the structure under test. After the self-adhesive distributed fiber optic sensor 1 is successfully attached to the structure under test 7, a sensor protective layer 2 needs to be placed on its outer surface to enhance its resistance to mechanical shock and environmental isolation.

[0082] In some embodiments, see continue to see Figure 1 The first deployment mechanism 5 includes a guide wheel assembly, a tensioning wheel 503, and a first pressing wheel 504 through which the self-adhesive distributed fiber optic sensor 1 passes in sequence. The guide wheel assembly is mounted on the main support 3 and guides the deployment path of the self-adhesive distributed fiber optic sensor 1. The tensioning wheel 503 is positioned between the guide wheel assemblies and integrates a constant torque control motor (such as a stepper motor) to output continuously adjustable tension, providing a constant pre-tension force for the self-adhesive distributed fiber optic sensor 1 during deployment.

[0083] In this invention, the tensioning wheel 503 applies a constant and controllable pre-tension force to the optical fiber, enabling the self-adhesive distributed optical fiber sensor 1 to effectively monitor compressive strain while maintaining its tensile strain monitoring function, thus broadening the application scope of distributed optical fibers in structural health monitoring. This is of great significance for promoting the widespread application of distributed optical fiber sensing technology in civil engineering.

[0084] Specifically, distributed fiber optic sensors, due to their thin and flexible nature, can only effectively measure tensile strain. When the structure under test is subjected to pressure, the optical fiber attached to its surface is prone to micro-bending or loosening, failing to effectively transmit compressive deformation to the fiber core, resulting in signal distortion. To extend its measurement range, pre-tensioning technology can be used: an initial tension is applied to the optical fiber during installation, keeping it taut. When the structure undergoes compressive deformation, this deformation first offsets the pre-tension force, and then the pre-tension force decreases. By monitoring the tension change of the optical fiber, the compressive strain can be calculated. For example, before pre-tensioning, the fiber strain range is only 0 to +10000 με; after appropriate pre-tensioning, the range can be extended to -3000 με to +7000 με, thus enabling the measurement of both tensile and compressive strain.

[0085] In some embodiments, the first clamping roller 504 is mounted below the main support 3 via a first spring connecting rod 505, for pressing and bonding the self-adhesive distributed fiber optic sensor 1 tightly to the surface of the structure under test 7. The first spring connecting rod 505 has a built-in compression spring, which can provide adjustable clamping force. In actual deployment, the clamping force can be flexibly adjusted according to different surface characteristics of the structure under test 7 and deployment requirements, thereby ensuring that the self-adhesive distributed fiber optic sensor 1 can achieve a tight and firm adhesion to the surface of the structure under test 7, laying a solid foundation for subsequent accurate measurement.

[0086] In some embodiments, see continue to see Figure 1 The guide wheel assembly includes a first guide wheel 501 and a second guide wheel 502, both of which are idlers used to guide the optical fiber path. Regarding the fiber deployment path, the first guide wheel 501 is located upstream of the tension wheel 503. During the deployment of the self-adhesive distributed optical fiber sensor 1, it accurately and stably guides the sensor to the tension wheel 503. The second guide wheel 502 is located downstream of the tension wheel 503 along the deployment path. During the deployment of the self-adhesive distributed optical fiber sensor 1, it guides the sensor to the first clamping wheel 504, ensuring the sensor can smoothly enter the next clamping process.

[0087] In some embodiments, the peeling mechanism 4 includes an adhesive material protective layer peeling wheel 401, which integrates a control motor to fix the adhesive material protective layer 1022 to its surface. During the deployment of the self-adhesive distributed fiber optic sensor 1, the control motor drives the adhesive material protective layer peeling wheel 401 to rotate, automatically peeling the adhesive material protective layer 1022 from the surface of the self-adhesive distributed fiber optic sensor 1, with the peeling speed synchronized with the deployment progress.

[0088] In some embodiments, the adhesive material protective layer peeling wheel 401 is located downstream of the guide wheel group along the layout path and adjacent to the first pressing wheel 504, so as to facilitate timely winding of the adhesive material protective layer 1022 before the self-adhesive distributed optical fiber sensor 1 is pressed and pasted, so as to achieve synchronous peeling of the protective layer.

[0089] In this invention, the surface of the adhesive material protective layer peeling wheel 401 is covered with a highly adhesive adhesive layer, which can quickly and firmly adhere to the adhesive material protective layer 1022 peeled off from the self-adhesive distributed optical fiber sensor 1, ensuring that the protective layer will not fall off during the winding process.

[0090] In practical applications, the peeling of the adhesive protective layer 1022 from the adhesive layer 1021 can be done manually. The operator manually and precisely peels a starting end of the adhesive protective layer 1022 from the adhesive layer 1021. This starting end is then attached to a pre-set attachment area on the adhesive protective layer peeling wheel 401. Subsequently, the integrated drive mechanism inside the peeling wheel rotates it in a preset direction and speed, thus achieving automatic winding of the adhesive protective layer 1022. Alternatively, a dedicated peeling initiation structure can be used to precisely separate a starting end of the adhesive protective layer 1022 from the adhesive layer 1021, and the separated starting end is accurately guided to the adhesive protective layer peeling wheel 401. Similarly, the rotation of the peeling wheel completes the automatic winding of the adhesive protective layer 1022.

[0091] It should be noted that the present invention does not set the two specific implementation methods mentioned above as unique. In practical applications, the two methods can be flexibly selected and optimized according to specific needs, cost budgets, operating environments and other factors.

[0092] In some embodiments, the first deployment mechanism 5 further includes an optical fiber unwinding mechanism 506, which can be installed on the main support 3. When the optical fiber to be deployed is long and heavy, the main support 3 is insufficient to support it. In this case, the optical fiber unwinding mechanism 506 can be set on an independent mobile platform or other bearing base for winding and releasing the self-adhesive distributed optical fiber sensor 1.

[0093] In practice, the self-adhesive distributed optical fiber sensor 1 is installed on the optical fiber unwinding mechanism 506, and the optical fiber sensor is transported to the end of the main support 3 by means of the guide wheel group, thereby supporting the convenient and efficient deployment of long-distance and heavy optical fiber sensors.

[0094] As is easily understood, mobile platforms include, but are not limited to, handheld platforms, drone platforms, and wheeled mobile platforms. Other load-bearing bases include, but are not limited to, fixed supports and construction platforms.

[0095] In some embodiments, see continue to see Figure 1The second deployment mechanism 6 includes a sensor protective layer unwinding mechanism 601 and a second clamping roller 602. The sensor protective layer unwinding mechanism 601 is mounted on the main support 3 and is detachable, allowing for easy replacement of the sensor protective layer 2 roll. The sensor protective layer unwinding mechanism 601 is used to wind and release the sensor protective layer 2. The second clamping roller 602 is mounted below the main support 3 via a second spring connecting rod 603 and is located behind the first clamping roller 504 in the deployment direction. It is used to press the released sensor protective layer 601 onto the outer surface of the self-adhesive distributed optical fiber sensor 1. Preferably, the second clamping roller 602 is set at the same height as the first clamping roller 504.

[0096] In this invention, the second spring link 603 also incorporates a compression spring to provide adjustable clamping force. By adjusting the compression degree of the compression spring, the clamping force of the second clamping wheel 602 on the sensor protective layer 2 can be flexibly changed according to different deployment scenarios, the material characteristics of the sensor protective layer 2, and the specific requirements of the self-adhesive distributed optical fiber sensor 1, thereby ensuring the stability and reliability of the deployment quality.

[0097] See also Figure 1 The main support 3 includes a mounting frame 301 and a connecting rod 302. The mounting frame 301 is made of aluminum alloy or carbon fiber and houses the aforementioned peeling mechanism 4, the first laying mechanism 5, and the second laying mechanism 6, supporting the overall structure. The connecting rod 302 is located at the bottom of the mounting frame 301 and connects the first laying mechanism 5 and the second laying mechanism 6 to ensure synchronized operation of both.

[0098] In some embodiments, the connecting rod 302 includes two obliquely arranged rods. One end of each rod is connected and fixed to the first pressing wheel 504 of the first placement mechanism 5 and the second pressing wheel 602 of the second placement mechanism 6, respectively, and the other end is connected and fixed to the mounting frame 301. The oblique rods can adjust their angles in real time according to the force on the pressing wheels, ensuring that the two pressing wheels can complete the pressing operation synchronously and stably, thus improving the placement quality and accuracy of the self-adhesive distributed fiber optic sensor.

[0099] See also Figure 1 The main support 3 also includes an extension connection component 303, which is disposed on the edge of at least one side of the main support 3 and is used to mount the pre-tensioned fiber optic laying device onto a mobile platform (such as a handheld platform, drone or wheeled robot) to enable remote or high-altitude operations.

[0100] In this invention, during the assembly of the pre-tensioned optical fiber laying device, the parallelism of each wheel axle needs to be calibrated to reduce optical fiber wear; the motor system is programmed by a PLC or microcontroller to achieve closed-loop control of tension force and stripping speed.

[0101] In one specific embodiment, when deploying the self-adhesive distributed optical fiber sensor 1 using the pre-tensioned optical fiber deployment device, the self-adhesive distributed optical fiber sensor 1, which is wound around the optical fiber unwinding mechanism 506, is sequentially passed through the first guide wheel 501, the tensioning wheel 503, the second guide wheel 502, and the first pressing wheel 504; the adhesive material protective layer 1022 on the self-adhesive distributed optical fiber sensor 1 is peeled off and fixed to the adhesive material protective layer peeling wheel 401, and then one end of the self-adhesive distributed optical fiber sensor 1 is attached to the surface of the structure 7 under test; at the same time, the sensor protective layer 2, which is fixed to the sensor protective layer unwinding mechanism 601, is passed around the second pressing wheel 602 and attached to the surface of the already deployed self-adhesive distributed optical fiber sensor 1; by advancing the pre-tensioned optical fiber deployment device forward, the deployment of the self-adhesive distributed optical fiber sensor 1 and the sensor protective layer 2 can be completed.

[0102] This implementation method significantly improves deployment efficiency and accuracy through integrated design. It is easy to understand that the above embodiments are merely examples, and parameters can be adjusted according to the structural type in actual applications.

[0103] See Figure 3 The present invention also proposes a construction method for the above-mentioned self-adhesive distributed optical fiber sensor construction system, comprising the following steps:

[0104] S1: Pass the self-adhesive distributed optical fiber sensor 1 through the guide wheel group and tension wheel 503 of the first deployment mechanism 5 in sequence, and set the required pre-tension force on the tension wheel 503 in advance.

[0105] In a preferred embodiment, the self-adhesive distributed optical fiber sensor 1, which is wound on the optical fiber unwinding mechanism 506, is led out and passes sequentially through the first guide wheel 501, the tension wheel 503, and the second guide wheel 502.

[0106] S2: Start the peeling mechanism 4 to automatically roll up the adhesive material protective layer 1022, exposing the adhesive material layer 1021 on the self-adhesive distributed optical fiber sensor 1.

[0107] In a preferred embodiment, one starting end of the self-adhesive distributed optical fiber sensor 1 is manually peeled off, the adhesive material protective layer 1022 is attached to the adhesive material protective layer peeling wheel 401, and then the adhesive material protective layer peeling wheel 401 is activated to automatically roll up the adhesive material protective layer 1022, exposing the adhesive material layer 1021.

[0108] S3: The self-adhesive distributed optical fiber sensor 1, after the adhesive material layer 1021 is exposed, passes through the first clamping wheel 504 and uses the adhesive material layer 1021 to attach its starting end to the surface of the structure under test 7.

[0109] In a preferred embodiment, the starting end of the self-adhesive distributed optical fiber sensor 1 is manually attached to the starting point on the surface of the structure under test 7.

[0110] S4: Push the pre-tensioned optical fiber deployment device along the surface of the structure under test, so that the first pressing wheel 504 continuously presses the self-adhesive distributed optical fiber sensor 1 onto the surface of the structure under test 7, while the tensioning wheel 503 maintains a constant pre-tension force.

[0111] In a preferred embodiment, the pre-tensioned fiber optic deployment device is moved along the surface of the structure. The device is fixed to the moving platform by the extension connecting member 303. The first pressing wheel 504 continuously presses the self-adhesive distributed fiber optic sensor 1 under the action of the first spring connecting rod 505 to ensure uniform adhesion. The tensioning wheel 503 maintains constant tension to avoid fiber optic slack or over-tension.

[0112] S5: Simultaneously start the second deployment mechanism 6, pull out the sensor protective layer 3 from the sensor protective layer unwinding mechanism 601, and press it onto the outer surface of the deployed self-adhesive distributed optical fiber sensor 1 through the second pressing wheel 602 to form a secondary protective layer, which enhances resistance to mechanical impact and environmental isolation.

[0113] In some embodiments, the method further includes S6: finishing work: after being deployed to the end point, the sensor protective layer 3 is cut off and the end is pressed tightly.

[0114] In this invention, the method has a clear operation process and a high degree of automation. It can accurately set the pre-tensioning force of the tensioning wheel, and in conjunction with the first and second clamping wheels, it allows the self-adhesive distributed fiber optic sensor to be flatly adhered to the surface of the structure being measured, ensuring the quality of adhesion. The automatic peeling and recycling of the adhesive material protective layer improves the overall work efficiency, and the pressing of the sensor protective layer forms secondary protection, enhancing the resistance to mechanical impact and environmental isolation. At the same time, it can flexibly adapt to different structural surfaces, reduce subsequent maintenance costs, and improve measurement efficiency.

[0115] It will be readily understood by those skilled in the art that, without conflict, the above-mentioned preferred solutions can be freely combined and superimposed.

[0116] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A self-adhesive distributed fibre optic sensor construction system, characterised in that, The application relates to a self-adhesive distributed optical fiber sensor, which comprises a layer of adhesive material and a protective layer of adhesive material covering the layer of adhesive material. The application also relates to a sensor protection layer for covering the outer surface of the self-adhesive distributed optical fiber sensor after the self-adhesive distributed optical fiber sensor is adhered to a measured structure. The application further relates to a pre-tensioned optical fiber laying device, which comprises a main support and a pre-tensioned optical fiber laying device, which comprises a main support and a pre-tensioned optical fiber laying device, which comprises a main support and a pre-tensioning optical fiber laying device, which comprises a main support and a pre-tensioning optical fiber laying device, which comprises a main support and a pre-tensioning optical fiber laying device, which comprises a main support and a pre-tensioning optical fiber laying device, which comprises a main support and a pre-tensioning optical fiber laying device, which comprises a main support and a pre-tensioning optical fiber laying device, which comprises a main support and a pre-tensioning optical fiber laying device, which comprises a main support and a pre-tensioning optical fiber laying device, which comprises a main support and a pre-tensioning optical fiber laying device, which comprises a main support and a pre-tensioning optical fiber laying device, which comprises a main support and a pre-tensioning optical fiber laying device, which comprises a main support and a pre-tensioning optical fiber laying device, which comprises a main support and a pre-tensioning optical fiber laying device, which comprises a main support and a pre-tensioning optical fiber laying device, which comprises a main support and a pre-tensioning optical fiber laying device, which comprises a main support and a pre-tensioning optical fiber laying device, which comprises a main support and a pre-tensioning optical fiber laying device, which comprises a main support and a pre-tensioning optical fiber laying device, which comprises a main support and a pre-tensioning optical fiber laying device, which comprises a main support and a pre-tensioning optical fiber laying device, which comprises a main support and a pre-tensioning optical fiber laying device, which comprises a main support and a pre-tensioning optical 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a ​ ​ ​ ​ 2. The self-adhesive distributed fibre optic sensor construction system of claim 1, wherein, ​ ​ ​ 3. The self-adhesive distributed fibre optic sensor construction system of claim 2, wherein, ​ 4. The self-adhesive distributed fibre optic sensor construction system of claim 1, wherein, ​ ​ ​ ​ 5. A self-adhesive distributed fibre optic sensor construction system according to claim 4, characterised in that, ​ 6. The self-adhesive distributed fibre optic sensor construction system of claim 4, wherein, ​ 7. The self-adhesive distributed fibre optic sensor construction system of claim 4, wherein, ​ 8. The self-adhesive distributed fibre optic sensor construction system of claim 4, wherein, ​ ​ ​ 9. The self-adhesive distributed fibre optic sensor construction system of claim 1, wherein, The main support comprises a mounting frame and a connecting rod; wherein the mounting frame is used for mounting the peeling mechanism, the first laying mechanism and the second laying mechanism, and the connecting rod is arranged at the bottom of the mounting frame and used for connecting the first laying mechanism and the second laying mechanism.

10. A method of construction of a self-adhesive distributed fibre optic sensor construction system according to any one of claims 1 to 9, characterised in that, The method comprises the following steps: The self-adhesive distributed optical fiber sensor is sequentially passed through the guide roller set and the tensioning roller of the first laying mechanism, and the required pre-tensioning force is set on the tensioning roller in advance; The peeling mechanism is started to automatically wind the adhesive material protective layer, so that the adhesive material layer on the self-adhesive distributed optical fiber sensor is exposed; The self-adhesive distributed optical fiber sensor with the exposed adhesive material layer is passed through the first pressing roller, and the starting end of the self-adhesive distributed optical fiber sensor is adhered to the surface of the measured structure by the adhesive material layer; The pre-tensioning optical fiber laying device is pushed, so that the self-adhesive distributed optical fiber sensor is continuously pressed on the surface of the structure by the first pressing roller, and the tensioning roller maintains the constant pre-tensioning force; The second laying mechanism is started synchronously, the sensor protective layer is led out from the winding mechanism, and is pressed and adhered to cover the outer surface of the laid self-adhesive distributed optical fiber sensor by the second pressing roller.

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