A pre-tensioning and laying device for self-adhesive distributed optical fiber sensors

Abstract

The utility model relates to a kind of pre-tensioning and laying device for self-adhesive distributed optical fiber sensor, wherein, self-adhesive distributed optical fiber sensor includes sensor body and sensor protective layer, sensor body is equipped with adhesive material layer and the adhesive material protective layer covered on it;Pre-tensioning and laying device includes main support, and:optical fiber unwinding mechanism, for winding and releasing sensor body;Peeling mechanism, for peeling adhesive material protective layer;First laying mechanism, for applying pre-tensioning to sensor body, and the sensor body is pasted to measured structure;Second laying mechanism, for laying sensor protective layer on the sensor body after pasting.The utility model is laid out using pre-tensioning and laying device to self-adhesive distributed optical fiber sensor with adhesive material layer, and laying efficiency is significantly improved;And pre-tensioning control makes measurement range expand to compression strain, improves monitoring accuracy.

Description

Technical Field

[0001] This utility model relates to the field of civil engineering health monitoring technology, and in particular to health monitoring of civil engineering structure strain and vibration measurement, specifically to a pre-tensioning deployment device for self-adhesive distributed optical fiber sensors. 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 pre-tensioning deployment device for self-adhesive distributed optical fiber sensors is of great significance for promoting the engineering application of distributed optical fiber sensing technology. Utility Model Content

[0007] In view of the shortcomings of the prior art, the main purpose of this utility model is to provide a pre-tensioning deployment device for self-adhesive distributed optical fiber sensors, 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 this utility model is as follows:

[0009] This invention proposes a pre-tensioning and deployment device for a self-adhesive distributed optical fiber sensor. The self-adhesive distributed optical fiber sensor includes a sensor body and a sensor protective layer. The sensor body has an adhesive material layer and an adhesive material protective layer covering the adhesive material layer. The sensor protective layer is used to cover the outer surface of the sensor body after it has been adhered to the structure being measured.

[0010] The pre-tensioning and deployment device includes a main support frame, and components mounted on the main support frame:

[0011] An optical fiber unwinding mechanism, used for winding and unwinding the sensor body;

[0012] A peeling mechanism for peeling off the adhesive material protective layer to expose the adhesive material layer;

[0013] The first deployment mechanism is used to apply a pre-tension force to the sensor body and to attach and fix the sensor body to the structure being measured.

[0014] The second deployment mechanism is used to deploy the sensor protective layer on the outer surface of the sensor body that is pasted and fixed to the structure under test.

[0015] In some embodiments, the sensor body includes:

[0016] 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;

[0017] 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.

[0018] In some embodiments, each of the composite optical fibers 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 strands of the composite optical fibers is covered with an optical fiber protective layer.

[0019] In some embodiments, the first deployment mechanism includes the sensor body passing through sequentially:

[0020] The guide wheel assembly, mounted on the main support, is used to guide the deployment path of the sensor body;

[0021] The tensioning wheel, located between the guide wheel groups, integrates a constant torque control motor to provide a constant pretension force to the sensor body.

[0022] The first clamping wheel is mounted below the main support via a first spring connecting rod, and is used to press and adhere the sensor body to the surface of the structure being measured.

[0023] In some embodiments, the guide wheel assembly includes a first guide wheel and a second guide wheel. The first guide wheel is located upstream of the tension wheel along the layout path and is used to guide the sensor body to the tension wheel. The second guide wheel is located downstream of the tension wheel along the layout path and is used to guide the sensor body to the first pressure wheel.

[0024] In some embodiments, the peeling mechanism includes an adhesive material protective layer peeling wheel with an integrated control motor, located downstream of the guide wheel assembly along the layout path and adjacent to the first pressing wheel, for peeling off the adhesive material protective layer before the sensor body is pressed.

[0025] In some embodiments, the second deployment mechanism includes:

[0026] A sensor protective layer unwinding mechanism is detachably mounted on the main support for winding and unwinding the sensor protective layer;

[0027] 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 sensor body.

[0028] In some embodiments, the fiber unwinding mechanism is mounted on the main support or disposed on a mobile platform or a support base.

[0029] In some embodiments, 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.

[0030] In some embodiments, the main support further includes an extension connection member disposed on the edge of at least one side of the main support for mounting the pretensioning deployment device onto a movable platform.

[0031] The advantages of this invention compared to existing technologies are as follows: This invention proposes a pre-tensioning deployment device for self-adhesive distributed optical fiber sensors. This device achieves efficient and accurate deployment of optical fiber sensors through integrated design, eliminating cumbersome fixing methods such as manual gluing and mechanical fixing. At the same time, it applies a constant and controllable pre-tensioning 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.

[0032] This invention integrates an adhesive material layer and an adhesive material protective layer on the sensor body, allowing the sensor body to be directly pasted 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 "peel and stick" of the sensor, greatly improving deployment efficiency, and is particularly suitable for large-scale, long-distance engineering applications such as bridges and tunnels.

[0033] This invention applies a precise and controllable pre-tension force to the sensor body while the sensor body is being deployed by the first deployment mechanism, thereby effectively extending the sensor's measurement range from tensile strain to compressive strain, thus comprehensively improving the accuracy of monitoring data and its engineering applicability.

[0034] This invention uses a second deployment mechanism to cover the outer surface of the attached sensor body 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 construction environments.

[0035] This invention utilizes an optical fiber unwinding mechanism to wind and release a self-adhesive distributed optical fiber sensor, a design that greatly improves the ease and efficiency of installation.

[0036] It should be understood that the description in this utility model description section is not intended to limit the key or essential features of the embodiments of this utility model, nor is it intended to restrict the scope of this utility model. Other features of this utility model will become readily apparent from the following description. Furthermore, implementation of any embodiment of this utility model does not imply the simultaneous possession or achievement of multiple or all of the aforementioned beneficial effects. Attached Figure Description

[0037] To more clearly illustrate the embodiments of this utility model 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.

[0038] 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 implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportional relationships, or adjustments to the size, without affecting the effects and purposes that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0039] Figure 1 This is a schematic diagram of the overall structure of a pre-tensioning and deployment device for a self-adhesive distributed optical fiber sensor according to some embodiments of the present invention.

[0040] Figure 2 This is a schematic diagram of the overall structure of the sensor body in some embodiments of this utility model.

[0041] Marked in the image:

[0042] 1-Sensor body; 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;

[0043] 2- Sensor protective layer;

[0044] 3-Main support frame; 301-Mounting frame; 302-Connecting rod; 303-Extension connection component;

[0045] 4- Peeling mechanism; 401- Adhesive material protective layer peeling wheel;

[0046] 5-First laying mechanism; 501-First guide wheel; 502-Second guide wheel; 503-Tension wheel; 504-First pressure wheel; 505-First spring connecting rod;

[0047] 6-Second deployment mechanism; 601-Sensor protective layer unwinding mechanism; 602-Second clamping roller; 603-Second spring connecting rod;

[0048] 7-Fiber optic unwinding mechanism;

[0049] 8-The structure under test.

[0050] The same or corresponding marks in the diagram indicate the same or corresponding parts. Detailed Implementation

[0051] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. Here, the illustrative embodiments of this utility model and their descriptions are used to explain this utility model, but are not intended to limit this utility model.

[0052] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," 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 utility model according to the specific circumstances.

[0053] 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.

[0054] It should also be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", and "outer" 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 this utility model 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 on this utility model.

[0055] 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 utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0056] This invention proposes a pre-tensioning deployment device for self-adhesive distributed optical fiber sensors. This device can deploy self-adhesive distributed optical fiber sensors with adhesive material layers, significantly improving deployment efficiency. Furthermore, the pre-tensioning force control extends the measurement range to compressive strain, improving monitoring accuracy.

[0057] The present invention will now be described in detail with reference to preferred embodiments.

[0058] like Figure 1 As shown, this utility model proposes a pre-tensioning deployment device for self-adhesive distributed optical fiber sensors. This pre-tensioning deployment device is mainly used for deploying self-adhesive distributed optical fiber sensors with self-adhesive layers, eliminating the need for cumbersome fixing methods such as manual gluing and mechanical fixing, achieving efficient and precise bonding of optical fibers to the structural surface, and applying a constant and controllable pre-tension force to the optical fibers.

[0059] Specifically, the self-adhesive distributed optical fiber sensor includes a sensor body 1 and a sensor protective layer 2. The sensor body 1 is provided with an adhesive material layer 1021 and an adhesive material protective layer 1022 covering the adhesive material layer 1021. The sensor protective layer 2 is used to cover the outer surface of the sensor body 1 after the sensor body 1 is attached to the structure under test 8.

[0060] In implementation, the sensor body 1 can be manufactured in roll form, facilitating large-scale deployment. (See also...) Figure 2 The sensor body 1 adopts a multi-layer composite structure design, consisting of a distributed optical fiber sensing unit 101 and a self-adhesive layer 102.

[0061] 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.

[0062] 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.

[0063] 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.

[0064] 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.

[0065] 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.

[0066] 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.

[0067] 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.

[0068] See also Figure 2The 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.

[0069] 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.

[0070] 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.

[0071] 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 sensor body 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 8 to be measured, and apply slight pressure to complete the fixation. No additional adhesive or mechanical fastening is required, achieving rapid deployment with "peel and stick".

[0072] In the technical solution constructed by this utility model, the sensor protective layer 2 and the pre-tensioning and deployment device work together and complement each other to provide a solid guarantee for the stable deployment and reliable application of the sensor body 1.

[0073] The sensor protective layer 2 is applied to the outer surface of the sensor body 1 after it is attached to the structure under test 8 by a pre-tensioning and laying device, forming a secondary protective layer for the distributed optical fiber sensing unit 101, thereby enhancing its resistance to mechanical impact and environmental isolation.

[0074] 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.

[0075] In this invention, the sensor protective layer 2 is a high-performance polymer protective layer added to the outside of the sensor body 1 after it is attached to the surface of the structure being measured 8. A high-strength rubber adhesive is pressed into the inner side of the protective layer, which can provide mechanical protection and environmental isolation.

[0076] See also Figure 1The pre-tensioning and laying device mainly consists of a main support 3, a peeling mechanism 4, a first laying mechanism 5, a second laying mechanism 6, and an optical fiber unwinding mechanism 7 installed on the main support 3.

[0077] 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 sensor body 1 and attach it to the structure under test 8. The second placement mechanism 6 is used to place the sensor protective layer 2 on the outer surface of the sensor body 1 attached to the structure under test. After the sensor body 1 is successfully attached to the structure under test 8, a sensor protective layer 2 needs to be placed on its outer surface to enhance its resistance to mechanical shock and environmental isolation. The fiber optic unwinding mechanism 7 is used to wind and release the sensor body 1.

[0078] 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 clamping wheel 504 through which the sensor body 1 passes in sequence. The guide wheel assembly is mounted on the main support 3 and is used to guide the deployment path of the sensor body 1. The tensioning wheel 503 is located between the guide wheel assemblies and integrates a constant torque control motor (such as a stepper motor) inside, which can output continuously adjustable tension force to provide a constant pre-tension force for the sensor body 1 during deployment.

[0079] In this invention, the tensioning wheel 503 applies a constant and controllable pre-tension force to the optical fiber, enabling the sensor body 1 to effectively monitor compressive strain while maintaining tensile strain monitoring, 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.

[0080] 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 tension, and then the pre-tension stress 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 tensile and compressive strain.

[0081] The first clamping roller 504 is mounted below the main support 3 via the first spring connecting rod 505, and is used to tightly press and adhere the sensor body 1 to the surface of the structure 8 being measured. 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 8 being measured and deployment requirements, thereby ensuring that the sensor body 1 can achieve a tight and firm fit with the surface of the structure 8 being measured, laying a solid foundation for subsequent accurate measurement.

[0082] 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 optic deployment path, the first guide wheel 501 is located upstream of the tension wheel 503, and during the sensor body 1 deployment process, 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, and during the sensor body 1 deployment process, it guides the sensor body 1 to the first clamping wheel 504, ensuring the sensor can smoothly enter the next clamping process.

[0083] 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 installation of the sensor body 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 sensor body 1, with the peeling speed synchronized with the installation progress.

[0084] In some embodiments, the adhesive material protective layer peeling wheel 401 is located downstream of the guide wheel assembly along the layout path and is adjacent to the first pressing wheel 504, so as to facilitate timely winding of the adhesive material protective layer 1022 before the sensor body 1 is pressed and pasted, so as to achieve synchronous peeling of the protective layer.

[0085] In this invention, the surface of the adhesive material protective layer peeling wheel 401 is covered with a highly adhesive adhesive layer. This adhesive layer can quickly and firmly adhere to the adhesive material protective layer 1022 peeled off from the sensor body 1, ensuring that the protective layer will not fall off during the winding process.

[0086] 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.

[0087] It should be noted that this utility model does not set a unique requirement for the two specific implementation methods mentioned above. In practical applications, the two methods can be flexibly selected and optimized according to specific needs, cost budgets, operating environments, and other factors.

[0088] In some embodiments, the fiber unwinding mechanism 7 can be installed on the main support 3. When the fiber to be laid is long and heavy, the main support 3 is not enough to support it. In this case, the fiber unwinding mechanism 7 can be set on an independent mobile platform or other bearing base for winding and releasing the sensor body 1.

[0089] In practice, the sensor body 1 is mounted on the optical fiber unwinding mechanism 7, 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.

[0090] 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.

[0091] In some embodiments, see continue to see Figure 1 The 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 against the outer surface of the sensor body 1. Preferably, the second clamping roller 602 is at the same height as the first clamping roller 504.

[0092] 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 sensor body 1, thereby ensuring the stability and reliability of the deployment quality.

[0093] 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.

[0094] 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 laying mechanism 5 and the second pressing wheel 602 of the second laying 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, thereby improving the laying quality and accuracy of the sensor body 1.

[0095] See also Figure 1 The main support 3 also includes an extension connection member 303, which is disposed on the edge of at least one side of the main support 3 and is used to mount the pre-tensioning deployment device to a mobile platform (such as a handheld platform, drone or wheeled robot) to achieve remote or high-altitude operation.

[0096] In this invention, during the assembly of the pre-tensioning and laying device, the parallelism of each wheel axle needs to be calibrated to reduce fiber wear; the motor system is programmed by a PLC or microcontroller to achieve closed-loop control of tension force and peeling speed.

[0097] In one specific embodiment, when using the pre-tensioning deployment device to deploy the sensor body 1, the sensor body 1, which is wound on the optical fiber unwinding mechanism 7, is passed sequentially 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 sensor body 1 is peeled off and fixed to the adhesive material protective layer peeling wheel 401, and then one end of the sensor body 1 is pasted onto the surface of the structure 8 to be measured; 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 pasted onto the surface of the deployed sensor body 1; by advancing the pre-tensioning deployment device forward, the deployment of the sensor body 1 and the sensor protective layer 2 can be completed.

[0098] 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.

[0099] The construction method of the pre-tensioning and laying device proposed in this utility model includes the following steps:

[0100] S1: Pass the sensor body 1 through the guide wheel group and tension wheel 503 of the first laying mechanism 5 in sequence, and set the required pre-tension force on the tension wheel 503 in advance.

[0101] In a preferred embodiment, the sensor body 1, which is wound on the optical fiber unwinding mechanism 7, is led out and passes through the first guide wheel 501, the tension wheel 503 and the second guide wheel 502 in sequence.

[0102] S2: Start the peeling mechanism 4 to automatically roll up the adhesive material protective layer 1022, exposing the adhesive material layer 1021 on the sensor body 1.

[0103] In a preferred embodiment, one starting end of the sensor body 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.

[0104] S3: Pass the sensor body 1, after the adhesive material layer 1021 is exposed, through the first clamping roller 504, and use the adhesive material layer 1021 to attach its starting end to the surface of the structure under test 8.

[0105] In a preferred embodiment, the starting end of the sensor body 1 is manually attached to the starting point on the surface of the structure being measured 8.

[0106] S4: Push the pre-tensioning device along the surface of the structure under test 8 so that the first pressing wheel 504 continuously presses the sensor body 1 against the surface of the structure under test 8, while the tensioning wheel 503 maintains a constant pre-tension force.

[0107] In a preferred embodiment, the pre-tensioning installation device is pushed to move 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 sensor body 1 under the action of the first spring connecting rod 505 to ensure uniform adhesion. The tensioning wheel 503 maintains constant tension to avoid the optical fiber from loosening or being overstretched.

[0108] S5: Simultaneously start the second deployment mechanism 6 to pull the sensor protective layer 3 out from the sensor protective layer unwinding mechanism 601, and press it onto the outer surface of the deployed sensor body 1 through the second pressing wheel 602 to form a secondary protective layer, enhancing resistance to mechanical impact and environmental isolation.

[0109] 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.

[0110] This invention utilizes a method with 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, ensures that the sensor body is flatly pasted onto the surface of the structure being measured, guaranteeing the quality of the pasting. 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 its resistance to mechanical impact and environmental isolation capabilities. At the same time, it can flexibly adapt to different structural surfaces, reducing subsequent maintenance costs and improving measurement efficiency.

[0111] 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.

[0112] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A pre-tensioning and deployment device for a self-adhesive distributed optical fiber sensor, characterized in that, The self-adhesive distributed fiber optic sensor includes a sensor body and a sensor protective layer. The sensor body has an adhesive material layer and an adhesive material protective layer covering the adhesive material layer. The sensor protective layer is used to cover the outer surface of the sensor body after it has been adhered to the structure being measured. The pre-tensioning and deployment device includes a main support frame, and components mounted on the main support frame: An optical fiber unwinding mechanism, used for winding and unwinding the sensor body; A peeling mechanism for peeling off the adhesive material protective layer to expose the adhesive material layer; The first deployment mechanism is used to apply a pre-tension force to the sensor body and to attach and fix the sensor body to the structure being measured. The second deployment mechanism is used to deploy the sensor protective layer on the outer surface of the sensor body that is pasted and fixed to the structure under test.

2. The pre-tensioning and laying device according to claim 1, characterized in that, The sensor body includes: 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; 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.

3. The pre-tensioning and laying device according to claim 2, characterized in that, 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 multiple strands of the composite optical fiber is covered with an optical fiber protective layer.

4. The pre-tensioning and laying device according to claim 1, characterized in that, The first deployment mechanism includes the sensor body passing through the following sequentially: The guide wheel assembly, mounted on the main support, is used to guide the deployment path of the sensor body; The tensioning wheel, located between the guide wheel groups, integrates a constant torque control motor to provide a constant pretension force to the sensor body. The first clamping wheel is mounted below the main support via a first spring connecting rod, and is used to press and adhere the sensor body to the surface of the structure being measured.

5. The pre-tensioning and laying device according to claim 4, characterized in that, The guide wheel assembly includes a first guide wheel and a second guide wheel. The first guide wheel is located upstream of the tension wheel along the layout path and is used to guide the sensor body to the tension wheel. The second guide wheel is located downstream of the tension wheel along the layout path and is used to guide the sensor body to the first pressure wheel.

6. The pre-tensioning and laying device according to claim 4, characterized in that, The peeling mechanism includes an adhesive material protective layer peeling wheel with an integrated control motor. It is located downstream of the guide wheel group along the layout path and adjacent to the first pressing wheel. It is used to peel off the adhesive material protective layer before the sensor body is pressed.

7. The pre-tensioning and laying device according to claim 4, characterized in that, The second deployment mechanism includes: A sensor protective layer unwinding mechanism is detachably mounted on the main support for winding and unwinding the sensor protective layer; 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 sensor body.

8. The pre-tensioning and laying device according to claim 1, characterized in that, The fiber unwinding mechanism is mounted on the main support or set on a mobile platform or a support base.

9. The pre-tensioning and laying device according to claim 1, characterized in that, 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.

10. The pre-tensioning and laying device according to claim 9, characterized in that, The main support also includes an extension connecting member, which is disposed on the edge of at least one side of the main support and is used to mount the pretensioning deployment device onto a movable platform.

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