Real-time strain monitoring device for carbon fiber grid reinforced concrete beam

Abstract

The invention provides a real-time strain monitoring device for a carbon fiber grid reinforced concrete beam, and relates to the technical field of constructional engineering. The real-time strain monitoring device for the carbon fiber grid reinforced reinforced concrete beam comprises a signal processing mechanism which is internally provided with a signal processing system; the monitoring mechanism comprises a micro substrate, a resistance strain gauge is pasted at the upper end of the micro substrate, a sealing protection layer is fixedly arranged at the upper ends of the micro substrate and the resistance strain gauge, the two ends of the resistance strain gauge are connected with shielded wires respectively, and the other ends of the shielded wires are connected with signal wires; the two sides of the lower end of the micro substrate are each provided with two sliding grooves, and sliding frames are arranged in the four sliding grooves in a sliding mode. The device can adapt to carbon fiber grids of different sizes, monitoring data is accurate, electromagnetic interference can be reduced, real-time transmission of strain data is achieved, installation is convenient and fast, the reinforcing effect is not affected, and reliable support is provided for structural safety.

Description

Technical Field

[0001] This invention relates to the field of building engineering technology, specifically to a real-time strain monitoring device for carbon fiber mesh reinforced reinforced concrete beams. Background Technology

[0002] Carbon fiber reinforced polymer (CFRP) grid reinforcement technology is an important innovative direction in the field of reinforced concrete structure reinforcement. Its core is to embed carbon fiber grids into polymer cement mortar (PCM) and then attach the composite reinforcement layer to the surface of concrete beams, columns and other components (such as the tension zone at the bottom of the beam). With the high strength and corrosion resistance of carbon fiber materials, it significantly improves the bending and shear bearing capacity of components and has been gradually promoted and applied in building structure repair and reinforcement projects.

[0003] In practical engineering applications, the effectiveness evaluation and long-term safety assurance of reinforced structures have become critical requirements. Under current technology, the performance evaluation of carbon fiber mesh-polymer cement mortar reinforcement layers mainly relies on two types of methods: one is destructive testing in a laboratory environment, which obtains ultimate performance data by loading until the component fails, but this method cannot reflect the actual service state of the structure; the other is phased static and dynamic load tests after the structure is completed, which can only obtain local performance parameters at the test point and cannot achieve continuous monitoring throughout the entire service life.

[0004] The above assessment methods have obvious limitations: on the one hand, key status information such as the stress-strain evolution process inside the reinforcement layer, the slippage trend of the carbon fiber mesh and mortar interface, and the risk of local delamination are difficult to capture in real time because they are inside the structure; on the other hand, the performance degradation of the reinforcement layer caused by load changes, environmental erosion and other factors during the service life of the structure cannot be detected in time through periodic tests, resulting in a lack of early warning mechanism for potential safety hazards of the structure, making it difficult to meet the engineering requirements for long-term health monitoring of building structures, and restricting the full life cycle safety management of the reinforced structure. Summary of the Invention

[0005] Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this invention provides a real-time strain monitoring device for carbon fiber mesh reinforced reinforced concrete beams. This device solves the problem that existing assessment methods for carbon fiber mesh reinforced reinforced concrete beams cannot monitor stress, strain, slippage, and other information of the reinforced layer in real time, making it difficult to provide timely warnings of potential safety hazards and ensuring the safety of the structure throughout its entire service life.

[0007] Technical solution

[0008] To achieve the above objectives, the present invention provides the following technical solution: a real-time strain monitoring device for carbon fiber mesh reinforced concrete beams, comprising:

[0009] A signal processing mechanism, with its built-in signal processing system;

[0010] The monitoring mechanism includes a micro substrate, on which a resistance strain gauge is attached. A sealing protective layer is fixedly disposed on the upper end of the micro substrate and the resistance strain gauge. Shielding wires are connected to both ends of the resistance strain gauge, and signal wires are connected to the other end of the shielding wires.

[0011] Two sliding grooves are formed on both sides of the lower end of the micro substrate. Sliding frames are slidably arranged inside the four sliding grooves. Two adhesives are fixedly arranged inside the four sliding frames. The adhesives are two stable agents that produce a strong adhesive effect after being mixed. Fixing frames are fixedly arranged inside the four sliding grooves. Two piercing needles are fixedly arranged on the side of the fixing frame near the adhesive. Tensioning springs are fixedly connected between the four fixing frames and the four sliding frames.

[0012] The signal processing mechanism includes a signal transmission module, which is electrically connected to the signal processing system and is used to wirelessly transmit strain data to the UAV inspection equipment to achieve aerial reception of monitoring signals.

[0013] Preferably, each of the four sliding frames is fixedly connected to two connecting frames on the side away from the micro substrate. Each of the two connecting frames is fixedly provided with a snap-fit ​​frame on the side away from the micro substrate. The two snap-fit ​​frames are respectively snapped onto both ends of the carbon fiber mesh, and the sliding frames are driven to slide along the slide groove through the connecting frames to adapt to carbon fiber meshes of different sizes.

[0014] Preferably, the signal processing mechanism further includes a protective housing, the lower end of which is fixedly provided with multiple signal interfaces, and the end of the signal line away from the resistance strain gauge is detachably connected to any one of the signal interfaces; the shielding wire has a double-core shielding structure to reduce external electromagnetic interference.

[0015] Preferably, a heat dissipation window is provided on one side of the inner side of the protective shell, and a dustproof net is provided on the inner side of the heat dissipation window; a fixing plate is fixed on both sides of the protective shell, and the fixing plate is provided with mounting holes for fixing the protective shell near the beam or indoors.

[0016] Preferably, the buckle frame has an elastic opening structure with anti-slip teeth on the inner side, which are in contact with the mesh wires of the carbon fiber mesh to enhance the tightness after buckling and prevent relative slippage.

[0017] Preferably, when the sliding frame slides outward along the groove to a preset position, the piercing needle can pierce the adhesive encapsulation, allowing the two agents to mix and solidify, tightly bonding and fixing the sliding frame to the inner wall of the groove, thus preventing the sliding frame from shifting relative to the micro substrate.

[0018] Preferably, the signal processing system of the signal processing mechanism includes a signal conditioning module, a microprocessor, a wireless communication module, and a rechargeable lithium battery; the signal conditioning module, based on the Wheatstone bridge principle, provides an excitation voltage to the resistance strain gauge and amplifies the weak resistance change signal; the microprocessor converts the amplified analog signal into a digital strain value; the wireless communication module is used to wirelessly transmit the strain data to a smart mobile terminal; the signal transmission module adopts a dedicated communication protocol for UAVs, supports the establishment of a stable communication connection with mainstream UAV inspection equipment, and realizes the synchronous matching of strain data and UAV visual acquisition data.

[0019] Beneficial effects

[0020] This invention provides a real-time strain monitoring device for carbon fiber mesh-reinforced reinforced concrete beams. It has the following beneficial effects:

[0021] 1. This invention provides a real-time strain monitoring device for carbon fiber mesh reinforced reinforced concrete beams. By designing a synergistic structure of a sliding groove, sliding frame, and snap-fit ​​bracket at the lower end of the micro-substrate, the position of the snap-fit ​​bracket can be flexibly adjusted, adapting to the installation requirements of carbon fiber meshes with different mesh spacings and wire diameters, thus expanding the applicability of the device. At the same time, the cooperation between the two-component adhesive inside the sliding frame and the piercing needle on the fixing bracket can quickly and stably fix the sliding frame to the micro-substrate after the snap-fit ​​bracket is positioned, avoiding the deviation of monitoring data caused by the displacement of the sliding frame during the monitoring process, and improving the adaptability of the device and the accuracy of monitoring data in different reinforcement scenarios.

[0022] 2. This invention provides a real-time strain monitoring device for carbon fiber mesh reinforced reinforced concrete beams. It employs multiple optimization designs in the signal transmission and processing stages. The shielding wire uses a double-core shielding structure, effectively isolating external electromagnetic interference and ensuring stable transmission of the weak signal generated by the resistance strain gauge. The signal processing mechanism's built-in signal conditioning module, based on the Wheatstone bridge principle, can accurately amplify the weak resistance change signal from the strain gauge. Combined with the microprocessor's digital conversion of the signal, it enables accurate acquisition of strain data. The wireless communication module supports real-time transmission of strain data to a smart mobile terminal, providing timely and reliable data support for structural health status assessment.

[0023] 3. This invention provides a real-time strain monitoring device for carbon fiber mesh reinforced concrete beams. The signal transmission module is specifically designed for UAV inspection equipment, enabling synchronous transmission of strain data to the UAV and achieving dual data reception from both ground-based intelligent mobile terminals and aerial UAVs. While receiving monitoring signals, the UAV can accurately capture the damage morphology of the structural surface (such as cracks and peeling), verifying the visual data against the strain monitoring data. This effectively avoids misjudgments that may arise from a single data source, making the structural safety assessment results more reliable and accurate, and providing more comprehensive and reliable technical support for the safety management of reinforced structures throughout their entire service life. Attached Figure Description

[0024] Figure 1 This is an isometric view of the present invention;

[0025] Figure 2 This is a schematic diagram of the explosion of the monitoring mechanism of the present invention;

[0026] Figure 3 This is a bottom-view axial view of the monitoring mechanism of the present invention;

[0027] Figure 4 This is an isometric view of the sliding frame of the present invention;

[0028] Figure 5 This is an isometric view of the two sliding frames of the present invention;

[0029] Figure 6 This is an isometric view of the signal processing mechanism of the present invention.

[0030] Among them, 1. Monitoring mechanism; 2. Signal line; 3. Signal processing mechanism; 101. Sealing protective layer; 102. Resistance strain gauge; 103. Micro substrate; 104. Clip frame; 105. Shielding wire; 106. Sliding frame; 107. Adhesive; 108. Puncture needle; 109. Fixing frame; 110. Tensioning spring; 111. Connecting frame; 112. Slide groove; 301. Protective shell; 302. Heat dissipation window; 303. Fixing plate; 304. Signal interface; 305. Signal transmission module. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] like Figure 1-6As shown, this embodiment of the invention provides a real-time strain monitoring device for carbon fiber mesh reinforced concrete beams, comprising:

[0033] The signal processing mechanism 3 has a built-in signal processing system, which includes a signal conditioning module, a microprocessor, a wireless communication module, and a rechargeable lithium battery. The signal conditioning module, based on the Wheatstone bridge principle, provides an excitation voltage to the resistance strain gauge 102 and amplifies the weak resistance change signal. The microprocessor converts the amplified analog signal into a digital strain value. The wireless communication module is used to wirelessly transmit the strain data to a smart mobile terminal. The signal processing mechanism 3 also includes a signal transmission module 305, which is electrically connected to the signal processing system and is used to wirelessly transmit the strain data to the UAV inspection equipment.

[0034] Specifically, in the above-described embodiments, the excitation voltage fluctuation range output by the signal conditioning module is controlled within ±0.5%, ensuring that the resistance strain gauge 102 is always in a stable working state. The amplification factor for the micro-ohm resistance change signal generated by the resistance strain gauge 102 is set to 1000-5000 times, which can amplify the weak signal to a range that the microprocessor can accurately recognize. The microprocessor uses a 16-bit high-precision analog-to-digital converter chip, and the strain value conversion error is controlled within ±1με, ensuring data conversion accuracy. The wireless communication module uses the Bluetooth 5.0 protocol, and the communication distance can reach 10-30 meters, meeting the signal transmission needs of different installation locations on the construction site. The rechargeable lithium battery capacity is selected from 1000-2000mAh, and the battery life in continuous monitoring mode is no less than 30 days. It also supports USB interface charging for convenient on-site power replenishment.

[0035] The signal transmission module 305 uses a 2.4GHz industrial-grade wireless communication chip, supporting compatibility with inspection systems of mainstream drone brands such as DJI and XAG. The communication distance is no less than 50 meters, covering the monitoring range of low- to mid-rise building structures. Data transmission latency is optimized to 50-100ms, ensuring synchronization between strain data and drone visual acquisition data. It features CRC-16 cyclic redundancy check coding, effectively resisting electromagnetic interference from equipment such as tower cranes and welding machines at construction sites, with a data transmission error rate of less than 10%. -6 The power consumption of the signal transmission module 305 is controlled at 5-10mA, achieving stable communication without affecting the overall battery life.

[0036] Monitoring mechanism 1 includes a micro substrate 103, a resistance strain gauge 102 is attached to the upper end of the micro substrate 103, a sealing protective layer 101 is fixedly provided on the upper end of the micro substrate 103 and the resistance strain gauge 102, and a shielding wire 105 is connected to both ends of the resistance strain gauge 102, and a signal wire 2 is connected to the other end of the shielding wire 105.

[0037] Specifically, in the above-mentioned specific embodiments, the micro-substrate 103 is made of glass fiber with a thickness of 0.8-1.2mm, a length of 18-22mm, and a width of 8-12mm. This size matches the grid unit of conventional carbon fiber mesh, allowing for installation close to the mesh wires without affecting the mesh's stress. The resistance strain gauge 102 is a metal foil strain gauge with a sensitivity coefficient of 2.0-2.2 and an operating temperature range covering -20℃ to 80℃, adaptable to different ambient temperatures at construction sites. The sealing protective layer 101 uses epoxy resin adhesive with a coating thickness of 0.5-1mm, covering the upper surface of the micro-substrate 103 and the entire area of ​​the resistance strain gauge 102. After curing, it can isolate moisture and corrosive substances in the polymer cement mortar, ensuring the long-term stable operation of the resistance strain gauge 102. The signal line 2 is made of polyvinyl chloride insulated wire with a diameter of 0.3-0.5mm, which can be flexibly laid out during reinforcement construction and is not easily broken.

[0038] Two grooves 112 are formed on both sides of the lower end of the micro substrate 103. Sliding frames 106 are slidably arranged inside the four grooves 112. Two adhesives 107 are fixedly arranged inside the four sliding frames 106. The adhesives 107 are two stable agents that produce a strong adhesive effect after mixing. Fixing frames 109 are fixedly arranged inside the four grooves 112. Two piercing needles 108 are fixedly arranged on the side of the fixing frame 109 near the adhesive 107. Tensioning springs 110 are fixedly connected between the four fixing frames 109 and the four sliding frames 106. When the sliding frame 106 slides outward along the groove 112 to the preset position, the piercing needles 108 can pierce the encapsulation of the adhesive 107, so that the two agents are mixed and solidified, and the sliding frame 106 is tightly bonded and fixed to the inner wall of the groove 112, preventing the sliding frame 106 from shifting relative to the micro substrate 103.

[0039] Specifically, in the above-described embodiment, the length of the groove 112 is 5-8 mm, and its width is adapted to the width of the sliding frame 106, allowing the sliding frame 106 to slide smoothly along the groove 112 without significant wobbling. The adhesive 107 is an epoxy resin-based two-component adhesive, with the two agents encapsulated in independent chambers inside the sliding frame 106, each chamber having a volume of 0.1-0.2 ml. After mixing, the curing time is 5-10 minutes, and the shear strength after curing is not less than 15 MPa, ensuring the stability of the sliding frame 106 against the inner wall of the groove 112. Fixed connection; the piercing needle 108 is made of stainless steel, with a needle tip angle of 30°-45° and a needle length of 2-3mm. It can accurately pierce the sealing film of the adhesive 107 when the sliding frame 106 slides without damaging the sliding frame 106; the tightening spring 110 is made of stainless steel spring wire with a wire diameter of 0.1-0.2mm, a free length of 3-5mm, and an initial elastic force of 0.5-1N. When the sliding frame 106 is not pushed, it can keep the sliding frame 106 in the initial position inside the slide groove 112, which is convenient for the initial storage and transportation of the device.

[0040] Two connecting frames 111 are fixedly connected to each of the four sliding frames 106 on the side away from the micro substrate 103. Each of the two connecting frames 111 is fixedly provided with a snap-fit ​​frame 104 on the side away from the micro substrate 103. The two snap-fit ​​frames 104 are snapped onto both ends of the carbon fiber mesh. The sliding frames 106 are driven to slide along the slide groove 112 through the connecting frames 111 to adapt to carbon fiber meshes of different sizes. The snap-fit ​​frame 104 has an elastic opening structure, with anti-slip teeth on the inside, and is in contact with the mesh wires of the carbon fiber mesh to enhance the tightness after snapping and prevent relative slippage.

[0041] Specifically, in the above-mentioned specific embodiments, the connecting frame 111 is made of elastic plastic material, with a length of 8-12mm and a thickness of 0.5-0.8mm. It can move synchronously with the sliding frame 106 and is not easily deformed. The opening width of the buckle frame 104 is 1-2mm, which is suitable for carbon fiber mesh wires with a diameter of 0.5-1.5mm. The elastic deformation range at the opening is 0.3-0.5mm, which makes it easy for the buckle frame 104 to quickly snap into the mesh wire and not easily fall off after being locked. The tooth height of the anti-slip teeth is 0.1-0.2mm, the tooth pitch is 0.3-0.5mm, and the tooth surface is roughened. When in contact with the carbon fiber mesh wire, it can increase the friction. Even during the deformation of the carbon fiber mesh under force, it can prevent the buckle frame 104 from sliding relative to the mesh wire, and ensure the coordinated deformation of the monitoring mechanism 1 and the carbon fiber mesh.

[0042] The signal processing mechanism 3 includes a protective housing 301. Multiple signal interfaces 304 are fixedly provided at the lower end of the protective housing 301. The end of the signal line 2 furthest from the resistance strain gauge 102 is detachably connected to any one of the signal interfaces 304. The shielded wire 105 has a double-core shielding structure to reduce external electromagnetic interference. A heat dissipation window 302 is provided on one side inside the protective housing 301, and a dustproof mesh is provided inside the heat dissipation window 302. Fixing plates 303 are fixedly provided on both sides of the protective housing 301, and mounting holes are provided on the fixing plates 303 for fixing the protective housing 301 near the beam or indoors.

[0043] Specifically, in the above-described embodiments, the protective housing 301 is made of ABS engineering plastic with a thickness of 1.5-2mm and overall dimensions of 80-100mm × 50-60mm × 30-40mm. It can accommodate all components of the signal processing system and is easy to carry and install. The signal interface 304 has 4-6 ports, employing a pluggable terminal structure with a pluggable force of 5-10N. After the signal line 2 is inserted, the contact resistance is less than 0.1Ω, ensuring stable signal transmission and facilitating future maintenance and replacement. The shielding layer of the shielded wire 105 uses a copper mesh braided structure. The shielding coverage is no less than 90%, which can effectively isolate electromagnetic interference generated by motors, frequency converters and other equipment on the construction site; the opening area of ​​the heat dissipation window 302 accounts for 20%-30% of the side area of ​​the protective shell 301, and the dustproof net is made of nylon material with a mesh size of 0.1-0.2mm, which can prevent dust from entering the interior of the protective shell 301 while ensuring heat dissipation effect; the fixing plate 303 is 2-3mm thick and the diameter of the mounting hole is 4-5mm, which is compatible with conventional expansion screws, making it easy to fix the protective shell 301 to concrete walls, beam sides and other positions.

[0044] Working principle: Based on the actual size of the carbon fiber mesh to be monitored, the connecting frame 111 is pushed to drive the sliding frame 106 to slide along the groove 112 at the lower end of the micro substrate 103. The spacing of the buckle frame 104 is adjusted until the buckle frame 104 can be stably buckled onto the target mesh wire of the carbon fiber mesh, thus completing the initial fixation of the monitoring mechanism 1 and the carbon fiber mesh. During this process, when the sliding frame 106 slides to the preset position, the piercing needle 108 on the fixing frame 109 will pierce the independent encapsulation of the two-component adhesive 107 inside the sliding frame 106. After the two agents are mixed, a curing reaction occurs, which tightly bonds the sliding frame 106 to the inner wall of the groove 112, realizing the rigid connection between the monitoring mechanism 1 and the carbon fiber mesh, and ensuring that the deformation energy of the carbon fiber mesh is synchronously transmitted to the resistance strain gauge 102.

[0045] When the carbon fiber mesh deforms under stress with the reinforced concrete beam, the resistance strain gauge 102, which is rigidly connected to it, will deform synchronously, thereby causing a change in its own resistance value. The signal processing mechanism 3 outputs a stable excitation voltage to the resistance strain gauge 102 through the shielded wire 105. The built-in signal conditioning module, based on the Wheatstone bridge principle, converts the weak resistance change signal generated by the resistance strain gauge 102 into a measurable voltage signal and amplifies the voltage signal. The amplified analog signal is transmitted to the microprocessor, which completes the conversion of the analog signal into a digital strain value.

[0046] The converted strain data is transmitted synchronously through two paths: first, via a wireless communication module to a ground-based intelligent mobile terminal for real-time ground monitoring; second, via the newly added signal transmission module 305, based on a dedicated UAV communication protocol, to the aerial UAV inspection equipment. While receiving the strain data, the UAV uses its onboard visual acquisition equipment to capture the surface morphology of the reinforced concrete beam and carbon fiber reinforcement layer, accurately identifying damage phenomena such as cracks and peeling, and then correlates and matches the visual data with the received strain data.

[0047] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A real-time strain monitoring device for carbon fiber mesh reinforced reinforced concrete beams, characterized in that, include: Signal processing mechanism (3), with its built-in signal processing system; The monitoring mechanism (1) includes a micro substrate (103), a resistance strain gauge (102) is attached to the upper end of the micro substrate (103), a sealing protective layer (101) is fixedly provided on the upper end of the micro substrate (103) and the resistance strain gauge (102), a shielding wire (105) is connected to both ends of the resistance strain gauge (102), and a signal line (2) is connected to the other end of the shielding wire (105). Two grooves (112) are opened on both sides of the lower end of the micro substrate (103). A sliding frame (106) is slidably arranged inside each of the four grooves (112). Two adhesives (107) are fixedly arranged inside each of the four sliding frames (106). The adhesives (107) are two stable agents that produce a strong adhesive effect after being mixed. A fixing frame (109) is fixedly arranged inside each of the four grooves (112). Two piercing needles (108) are fixedly arranged on the side of the fixing frame (109) near the adhesive (107). A tightening spring (110) is fixedly connected between each of the four fixing frames (109) and the four sliding frames (106). The signal processing mechanism (3) includes a signal transmission module (305), which is electrically connected to the signal processing system and is used to wirelessly transmit strain data to the UAV inspection equipment to realize the reception of monitoring signals in the air.

2. The real-time strain monitoring device for carbon fiber mesh reinforced concrete beams according to claim 1, characterized in that: Two connecting frames (111) are fixedly connected to each of the four sliding frames (106) on the side away from the micro substrate (103). Each of the two connecting frames (111) is fixedly provided with a snap-fit ​​frame (104) on the side away from the micro substrate (103). The two snap-fit ​​frames (104) are snapped onto the two ends of the carbon fiber mesh respectively, and the sliding frames (106) are driven by the connecting frames (111) to slide along the slide groove (112) to adapt to carbon fiber meshes of different sizes.

3. The real-time strain monitoring device for carbon fiber mesh reinforced concrete beams according to claim 1, characterized in that: The signal processing mechanism (3) also includes a protective housing (301), and the lower end of the protective housing (301) is fixedly provided with multiple signal interfaces (304). The end of the signal line (2) away from the resistance strain gauge (102) is detachably connected to any one of the signal interfaces (304). The shielding line (105) is a double-core shielding structure used to reduce external electromagnetic interference.

4. The real-time strain monitoring device for carbon fiber mesh reinforced concrete beams according to claim 3, characterized in that: The protective shell (301) has a heat dissipation window (302) on one side inside, and a dustproof net is provided on the inner side of the heat dissipation window (302); both sides of the protective shell (301) are fixedly provided with fixing plates (303), and the fixing plates (303) are provided with mounting holes for fixing the protective shell (301) near the beam or indoors.

5. A real-time strain monitoring device for carbon fiber mesh reinforced concrete beams according to claim 2, characterized in that: The buckle bracket (104) has an elastic opening structure with anti-slip teeth on the inside, which are in contact with the mesh wires of the carbon fiber mesh to enhance the tightness after buckling and prevent relative slippage.

6. A real-time strain monitoring device for carbon fiber mesh reinforced concrete beams according to claim 1, characterized in that: When the sliding frame (106) slides outward along the groove (112) to the preset position, the piercing needle (108) can pierce the encapsulation of the adhesive (107), so that the two agents are mixed and cured, and the sliding frame (106) is tightly bonded and fixed to the inner wall of the groove (112), preventing the sliding frame (106) from shifting relative to the micro substrate (103).

7. The real-time strain monitoring device for carbon fiber mesh reinforced concrete beams according to claim 1, characterized in that: The signal processing system of the signal processing mechanism (3) includes a signal conditioning module, a microprocessor, a wireless communication module, and a rechargeable lithium battery. The signal conditioning module is based on the Wheatstone bridge principle to provide excitation voltage to the resistance strain gauge (102) and amplify the weak resistance change signal. The microprocessor converts the amplified analog signal into a digital strain value. The wireless communication module is used to wirelessly transmit strain data to a smart mobile terminal. The signal transmission module (305) adopts a dedicated communication protocol for UAVs, supports the establishment of a stable communication connection with mainstream UAV inspection equipment, and realizes the synchronous matching of strain data and UAV visual acquisition data.

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