Structural adhesive carbon fiber reinforcement quality detection device and method

Abstract

The invention relates to the technical field of quality detection, and provides a structural adhesive carbon fiber reinforcement quality detection device which comprises a shell, the lower end of the shell is fixedly connected with a first supporting leg, and the structural adhesive carbon fiber reinforcement quality detection device is characterized in that the upper end of the shell is fixedly connected with a hydraulic cylinder, and a lifting assembly driven by the hydraulic cylinder is arranged in the shell; the bottom end of the lifting assembly is fixedly connected with a stress sensor, and an impact plate is arranged at the bottom end of the stress sensor. The impact plate is arranged below the lifting assembly, so that the carbon fibers can be repeatedly hammered; the deformable abutting plate is arranged, so that the detection device can be adapted to different curved surface detection requirements; in the hammering process, the three core indexes of hollowing, compactness and interface bonding of the carbon fibers can be detected through a stress sensor, information collected by an audio collector and a heating plate, so that the detection data is more comprehensive.

Description

Technical Field

[0001] The invention relates to the technical field of quality inspection, and in particular to a quality inspection device and method for structural carbon fiber reinforcement. Background Art

[0002] Carbon fiber has the characteristics of low density, high strength, good durability, strong corrosion resistance, acid, alkali and other chemical corrosion resistance, good flexibility and strong strain capacity. The truss frame roof made of carbon fiber tube is about 50% lighter than steel, which makes large structures reach the level of practicality, and the construction efficiency and seismic performance have been greatly improved. In addition, when carbon fiber is used to reinforce concrete structures, it is not necessary to add bolts and rivets to fix them, which has little disturbance to the original concrete structure and simple construction process. When concrete structure buildings need to be reinforced or repaired, carbon fiber sheets are bonded to the concrete for reinforcement. The construction quality of each process and the properties of the bonding material itself are closely related to the reinforcement effect. Therefore, the bonding strength between the bonding material and the concrete is an important comprehensive indicator reflecting the quality of the reinforced and repaired concrete structure. However, the existing detection is too single and cannot cover the three core indicators of hollowing, compactness and interface bonding at the same time. The technical results of a single detection are too limited; the existing detection device can only be used on a plane and cannot adapt to the detection needs of different curved surfaces (such as beams, columns, and plates). Summary of the invention

[0003] In view of the deficiencies in the prior art, the present invention provides a device and method for detecting the quality of structural carbon fiber reinforcement, which solves the problems raised in the above-mentioned background technology.

[0004] The technical solution of the present invention is as follows:

[0005] A structural carbon fiber reinforcement quality inspection device comprises an outer shell, the lower end of which is fixedly connected to a first leg, and is characterized in that: the upper end of the outer shell is fixedly connected to a hydraulic cylinder, a lifting assembly driven by the hydraulic cylinder is arranged in the outer shell, the bottom end of the lifting assembly is fixedly connected to a stress sensor, the bottom end of the stress sensor is provided with an impact plate, a heating plate is arranged in the impact plate, an audio collector for collecting sound waves is arranged in the outer shell, the bottom end of the first leg is hinged to a second leg, and a deformable resistance plate is arranged at the bottom end of the second leg.

[0006] Furthermore, the lifting assembly includes an n-shaped frame fixedly connected to the output end of the hydraulic cylinder, a gear rotatably connected inside the n-shaped frame, one side of the gear meshing with a first rack fixedly connected to the outer shell, and the other side of the gear meshing with a second rack slidably connected to the outer shell.

[0007] Furthermore, sliding grooves are provided on both side walls of the second supporting leg, and sliding blocks are slidably connected to the sliding grooves. Both sides of the abutment plate are connected to the sliding blocks via pull ropes.

[0008] Furthermore, a memory metal spring is arranged in the contact plate.

[0009] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects: by arranging an impact plate under the lifting assembly, the carbon fiber can be repeatedly hammered. During the hammering process, the three core indicators of hollowing, density and interface bonding of the carbon fiber are detected by collecting information through stress sensors, audio collectors and heating plates; by arranging a deformable resistance plate, the detection device can be adapted to different curved surface detection requirements.

[0010] A method for a structural carbon fiber reinforcement quality detection device comprises the following steps:

[0011] Step 1: Preprocessing

[0012] Clean the reinforced surface and mark the inspection area grid;

[0013] Step 2: hollow drum detection

[0014] The impact plate is placed on the upper end of the carbon fiber to be tested for heating, and the infrared thermal imaging module is started to scan the surface temperature field and record the abnormal temperature area;

[0015] Step 3: Density and stress testing

[0016] When the impact plate hammers the carbon fiber, the audio acquisition instrument collects the frequency response of each measuring point and judges the density of the colloid by combining the calibration data; a micro load is applied through the stress sensor, the interface slip is recorded and the fracture energy parameters are calculated;

[0017] Step 4: Data Analysis and Evaluation

[0018] Generate a visual report, mark the defect location, area and bond strength level, and output the reinforcement quality rating. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of a device for detecting the construction quality of concrete post-anchor bolts;

[0020] Figure 2 is a cross-sectional schematic diagram of the outrigger;

[0021] In the figure: 1, shell, 101, handle, 2, first leg, 3, second leg, 4, contact plate, 5, hydraulic cylinder, 6, connecting rod, 7, N-shaped frame, 8, gear, 9, first rack, 10, second rack, 11, bottom plate, 12, slide rail, 13, stress sensor, 14, impact plate, 15, heating plate, 16, audio collector, 17, display screen, 18, slider, 19, pull rope, 20, connecting seat, 21, slide groove, 22, first fixing nut, 23, memory metal spring, 24, second fixing nut. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] As shown in Figure 1-2, a structural carbon fiber reinforcement quality inspection device and method include a shell 1, a first leg 2 is fixedly connected to the lower end of the shell 1, a hydraulic cylinder 5 is fixedly connected to the upper end of the shell 1, a lifting assembly driven by the hydraulic cylinder 5 is arranged in the shell 1, a stress sensor 13 is fixedly connected to the bottom end of the lifting assembly, an impact plate 14 is arranged at the bottom end of the stress sensor 13, a heating plate 15 is arranged in the impact plate 14, an audio collector 16 for collecting sound waves is arranged in the shell 1, a second leg 3 is hinged to the bottom end of the first leg 2, and a deformable resistance plate 4 is arranged at the bottom end of the second leg 3.

[0024] Specifically, a handle 101 is fixedly connected to the upper end of the shell 1; when the impact test is performed on the carbon fiber, the hydraulic cylinder 5 is started, the lifting assembly performs reciprocating motion in the shell 1, and the impact plate 14 at the bottom of the lifting assembly repeatedly hammers the ground; in the process of hammering the carbon fiber, the shear stress and slip amount of the interface between the carbon fiber and the substrate are monitored in real time through the stress sensor 13; the heating plate 15 uses a non-contact heating device (such as an infrared lamp) to heat the surface of the carbon fiber, and uses a thermal imager to capture the temperature field distribution, identify hollowing defects, and record abnormal temperature zones (the hollowing area is low temperature due to the insulation of the air layer); the impact plate 14 and the audio collector 16 cooperate to generate sound waves by knocking Signal, analyze the frequency response difference to determine the density of the colloid; the detection device of the present invention covers the three core indicators of hollowing, density, and interface bonding at the same time, avoiding the limitations of a single technology; when the first leg 2 and the second leg 3 are in a vertical state, the bottom end of the impact plate 14 can be in contact with the carbon fiber; the second leg 3 can be rotated 90 degrees clockwise or counterclockwise, which can adapt to a columnar or narrow space, and the first leg 2 and the second leg 3 are locked and limited by a second fixing nut; by setting a deformable contact plate 4, the contact plate 4 can be adapted to the needs of the curved surface detection surface; in order to prevent the contact plate 4 from slipping during use, a raised rubber block is bonded to the bottom end of the contact plate 4;

[0025] In the specific implementation of the present invention, the detection device is provided with a power module and a control module. The control module adopts a display screen 17 with a control function. The display screen is arranged at the upper end of the shell 1. The display screen 17 is matched with control buttons for controlling the lifting and lowering of the hydraulic cylinder 5, the start of the stress sensor 13, the start and stop of the heating plate 15, and the start and stop of the audio collector 16. The power module adopts a rechargeable power supply, and the rechargeable power supply is electrically connected to the control board. The hydraulic cylinder 5, the stress sensor 13, the heating plate 15 and the audio collector 16 are electrically connected to the display screen 17. The control module is also provided with a wireless module to support wireless transmission of the detection results to the mobile terminal, so as to realize remote monitoring and report generation. The connection method and working principle of the power module, the display screen 17 and the hydraulic cylinder 5, the stress sensor 13, the heating plate 15 and the audio collector 16 are all prior arts and will not be repeated here.

[0026] like Figure 1 As shown, the lifting assembly includes an n-shaped frame 7 fixedly connected to the output end of the hydraulic cylinder 5, a gear 8 is rotatably connected inside the n-shaped frame 7, one side of the gear 8 is meshed with a first rack 9 fixedly connected to the housing 1, and the other side of the gear 8 is meshed with a second rack 10 slidably connected to the housing 1.

[0027] Specifically, the output end of the hydraulic cylinder 5 is fixedly connected with a connecting rod 6, and the bottom end of the connecting rod 6 is fixedly connected with an n-shaped frame 7. The vertical plate of the n-shaped frame 7 is provided with a connected circular hole. The distance between the two vertical plates is greater than the width of the gear 8. The gear 8 is rotatably connected to the n-shaped frame 7 through a rotating shaft. The upper and lower ends of the first rack 9 are fixedly connected to the upper and lower sides of the inner wall of the shell 1. The inner wall of the shell 1 is fixedly connected with a bottom plate 11 on the other side relative to the gear 8. The bottom plate 11 is fixedly connected with a slide rail 12 with a T-shaped cross-section. The second rack 10 is provided with a T-shaped slider that matches the slide rail 12; when the output end of the hydraulic cylinder 5 is extended, the gear 8 moves downward, and the gear 8 meshes and rotates with the first rack 9. At this time, the second rack 10 meshes with the gear 8 and moves downward. When the output end of the hydraulic cylinder 5 is shortened, the gear 8 moves upward. At this time, the second rack 10 meshes with the gear 8 and moves upward. Repeating this operation achieves the effect of hammer detection, reduces manual intervention, and improves detection efficiency.

[0028] like Figure 2 As shown, a slide groove 21 is provided on both side walls of the second leg 3 , a slider 18 is slidably connected to the slide groove 21 , and both sides of the abutment plate 4 are connected to the slider 18 via a pull rope 19 ; a memory metal spring 23 is provided inside the abutment plate 4 .

[0029] Specifically, the transverse cross-section of the slide groove 21 is a convex structure, the slider 18 is a convex block matched with the slide groove 21, the lower end of the slider 18 and the upper end of the contact plate 4 are fixedly connected with a connecting seat 20 on both sides, and the two ends of the pull rope 19 are fixedly connected to the connecting seat 20 on the same side; in order to ensure that the contact plate 4 can contact with the cylindrical detection surface, a memory metal spring 23 is arranged in the contact plate 4; when the memory metal spring 23 is squeezed, the two ends of the memory metal spring 23 are bent downward in an arc shape, which can contact with the cylindrical detection surface. The detection surfaces are in contact with each other; by setting a pull rope 19, the contact plate 4 can be kept in a straight state at all times and will not bend due to the extrusion force; in order to ensure that the position of the slider 18 on the second leg 3 is limited, a through threaded hole is opened on the slider 18, and the slider 18 is limited and fixed by a first fixing nut 22; when in use, the first fixing nut 22 on the slider 18 is loosened, the contact plate 4 contacts the detection surface and presses it, and the two ends of the memory metal spring 23 bend downward and pull the slider 18 downward through the pull rope 19.

[0030] The working process of a structural carbon fiber reinforcement quality detection device provided by the present invention is as follows:

[0031] Grasp the handles 101 on both sides with both hands, place the detection device horizontally so that the contact plate 4 contacts the detection surface, and press the button on the display screen 17; start the hydraulic cylinder 5 to make the impact plate 14 descend and not contact the carbon fiber, heat the heating plate 15 and use the thermal imager to detect whether there is a hollow drum; start the hydraulic cylinder 5 for a period of time, so that the impact plate 14 repeatedly hammers the carbon fiber, and at the same time start the stress sensor 13 and the audio collector 16 to collect information;

[0032] When the detection surface is a cylindrical or other curved surface, loosen the second fixing nut 24 to rotate the second leg 3 90 degrees and fix it; loosen the first fixing nut 22, the two ends of the memory metal spring 23 bend downward and pull the slider 18 downward through the pull rope 19, driving the contact plate 4 to contact the curved surface.

[0033] A structural carbon fiber reinforcement quality detection device method comprises the following steps:

[0034] Step 1: Preprocessing

[0035] Clean the reinforced surface and mark the inspection area grid;

[0036] Step 2: hollow drum detection

[0037] The impact plate 14 is placed on the upper end of the carbon fiber to be tested for heating, and the infrared thermal imaging module is started to scan the surface temperature field, and the hollow area in the abnormal temperature zone is recorded to be low temperature due to the heat insulation of the air layer;

[0038] Step 3: Density and stress testing

[0039] When the impact plate 14 hammers the carbon fiber, the audio collector 16 collects the frequency response of each measuring point and determines the density of the colloid in combination with the calibration data; a micro load is applied through the stress sensor 13 to record the interface slip and calculate the fracture energy parameter;

[0040] Step 4: Data Analysis and Evaluation

[0041] Generate a visual report, mark the defect location, area and bonding strength level, and output the reinforcement quality rating as qualified / needs rework.

[0042] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A structural carbon fiber reinforcement quality inspection device, comprising a housing (1), a first leg (2) being fixedly connected to the lower end of the housing (1), characterized in that: The upper end of the shell (1) is fixedly connected to a hydraulic cylinder (5), a lifting assembly driven by the hydraulic cylinder (5) is arranged inside the shell (1), a stress sensor (13) is fixedly connected to the bottom end of the lifting assembly, an impact plate (14) is arranged at the bottom end of the stress sensor (13), a heating plate (15) is arranged inside the impact plate (14), an audio collector (16) for collecting sound waves is arranged inside the shell (1), the bottom end of the first leg (2) is hinged to the second leg (3), and the bottom end of the second leg (3) is provided with a deformable contact plate (4).

2. The structural carbon fiber reinforcement quality detection device according to claim 1 is characterized in that: The lifting assembly comprises an n-shaped frame (7) fixedly connected to the output end of the hydraulic cylinder (5), a gear (8) rotatably connected inside the n-shaped frame (7), one side of the gear (8) meshing with a first rack (9) fixedly connected inside the housing (1), and the other side of the gear (8) meshing with a second rack (10) slidably connected inside the housing (1).

3. The structural carbon fiber reinforcement quality detection device according to claim 1 is characterized in that: Slide grooves (21) are provided on the two side walls of the second leg (3), a slider (18) is slidably connected to the slide groove (21), and the two sides of the abutment plate (4) are connected to the slider (18) via a pull rope (19).

4. The structural carbon fiber reinforcement quality detection device according to claim 1 is characterized in that: A memory metal spring (23) is arranged inside the abutment plate (4).

5. A structural carbon fiber reinforcement quality detection device method, comprising the structural carbon fiber reinforcement quality detection device according to any one of claims 1 to 4, characterized in that: The following steps are involved: Step 1: Preprocessing Clean the reinforced surface and mark the inspection area grid; Step 2: hollow drum detection The impact plate (14) is placed on the upper end of the carbon fiber to be tested for heating, and the infrared thermal imaging module is started to scan the surface temperature field and record the abnormal temperature area (the hollow area is low temperature due to the heat insulation of the air layer); Step 3: Density and stress testing When the impact plate (14) hammers the carbon fiber, the audio acquisition device (16) collects the frequency response of each measuring point and determines the density of the colloid in combination with the calibration data; a micro load is applied through the stress sensor (13), the interface slip amount is recorded and the fracture energy parameter is calculated; Step 4: Data Analysis and Evaluation Generate a visual report, mark the defect location, area and bonding strength level, and output the reinforcement quality rating (qualified / need rework).

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