Carbon fiber plate prestress detection device and detection method

Abstract

The invention discloses a carbon fiber plate prestress detection device and a detection method, which are applied to the technical field of carbon fiber plate prestress detection, and comprise a detection table, a driving mechanism arranged on the left side of the detection table and a clamping mechanism arranged in the detection table, the driving mechanism is used for driving the carbon fiber plate on the pulling and pressing clamping mechanism to perform prestress detection, and the clamping mechanism is used for clamping the carbon fiber plate and adjusting the clamping position of the carbon fiber plate; the clamping mechanism comprises a movable end and a fixed end, the movable end comprises a first clamping assembly and a tension and compression sensor, and the first clamping assembly comprises a back plate, a bottom plate, a top plate and a clamping plate in sliding connection with the back plate, and the bottom plate and the top plate are fixedly connected with the back plate; a first groove is formed in the bottom plate, a first sliding seat is arranged in the first groove, the first sliding seat is in sliding connection with the bottom plate, and a pressure sensor is fixedly connected in the first groove of the bottom plate.

Description

Technical Field

[0001] The present invention relates to the technical field of prestress detection of carbon fiber plates, and particularly to a prestress detection device and method for carbon fiber plates. Background Technique

[0002] A carbon fiber plate is a unidirectional plate for carbon fiber reinforcement and strengthening, which is a carbon fiber composite material formed by infiltrating and hardening carbon fibers with resin, curing in a mold, and continuously stretching. The carbon fiber plate is light in weight, good in flexibility, high in tensile strength, and has good earthquake resistance, impact resistance and corrosion resistance. Compared with carbon fiber cloth, the carbon fiber plate has a better reinforcement effect and can avoid the problems of weakened reinforcement effect caused by stacking multiple layers of carbon cloth and difficulties in actual construction.

[0003] During the production process of carbon fiber plates, it is necessary to fix the formed carbon fiber plates and perform prestress detection. Among them, during the tensile test in the prestress detection process of carbon fiber plates, due to the poor fixing effect of traditional detection devices, if the fixing position shifts, manual readjustment and clamping are required, the operation is relatively cumbersome, and the phenomenon of carbon fiber plates breaking away due to insecure fixing is likely to occur, affecting the normal progress of detection work. Summary of the Invention

[0004] The purpose of the present invention is to provide a prestress detection device and method for carbon fiber plates, which can simplify the clamping process during the prestress detection of carbon fiber plates and improve the clamping stability, so as to solve the problems raised in the above background technique.

[0005] To solve the above technical problems, the present invention provides the following technical solution: A prestress detection device and method for carbon fiber plates, including a detection table, a driving mechanism arranged on the left side of the detection table, and a clamping mechanism arranged inside the detection table. The driving mechanism is used to drive the carbon fiber plate on the tensile and compression clamping mechanism to perform prestress detection, and the clamping mechanism is used to clamp the carbon fiber plate and adjust the clamping position of the carbon fiber plate; The clamping mechanism includes a mobile end and a fixed end. The mobile end includes a clamping component one and a tensile and compression sensor. The clamping component one includes a back plate, a bottom plate and a top plate fixedly connected to the back plate, and a clamping plate slidably connected to the back plate; A groove one is opened on the bottom plate, a sliding seat one is arranged in the groove one, the sliding seat one is slidably connected to the bottom plate, a pressure sensor is fixedly connected in the groove one of the bottom plate, and a plurality of through grooves one are opened on the sliding seat one; A driving part three and a driving part four are fixedly connected to the side of the sliding seat one. A long rotating shaft and a plurality of short rotating shafts are arranged at intervals in the through groove one. Only the long rotating shaft or the short rotating shaft is arranged in the same through groove one. Both the long rotating shaft and the short rotating shaft are connected to the sliding seat one by bearings. A plurality of rollers one are fixedly connected to the long rotating shaft, and a plurality of rollers two are fixedly connected to the short rotating shaft; The pressure sensor corresponds to the position of the first through groove, and the pressure sensor is electrically connected to a pressure module, which is used to obtain the pressure data detected by the pressure sensor and determine the clamping position of the carbon fiber board.

[0006] According to the above technical solution, the test bench includes a support and a protective box fixed on the top of the support. The top of the protective box is hinged with a box cover, which can prevent the fragments generated by stretching exercises from hurting the staff.

[0007] According to the above technical solution, the driving mechanism includes a first driving part and a first lead screw. The first driving part is fixed on the bottom surface of one side of the test bench, and the output end of the first driving part is connected to the first lead screw. Both ends of the first lead screw penetrate and are connected to the inner wall of the protective box through bearings. Guide columns are respectively and fixedly connected to both sides below the first lead screw inside the protective box.

[0008] According to the above technical solution, the first lead screw is threadedly connected to a transmission plate, and the transmission plate is penetrated and slidably connected to the guide columns. A connecting piece is slidably connected to the surface of the transmission plate through a rod. The connecting piece is located on the surface of the transmission plate away from the first clamping assembly. One end of the rod close to the first clamping assembly is fixedly connected to the first clamping assembly. The tension and compression sensor is fixed between the first clamping assembly and the transmission plate.

[0009] According to the above technical solution, a second driving part is fixedly connected to the top plate. Two groups of second lead screws are connected to the bottom plate and the top plate through bearings, and the second lead screws are threadedly connected to the clamping plates. A number of first anti-slip strips are fixedly connected to the top of the bottom plate, and a number of first springs are fixedly connected to the bottom of the first sliding seat. The other ends of the first springs are fixedly connected to the bottom plate. Anti-slip layers with a certain thickness and elasticity are provided on the surfaces of both the first roller and the second roller.

[0010] According to the above technical solution, a number of second anti-slip strips are fixedly connected to the clamping plates, and the second anti-slip strips correspond to the positions of the first anti-slip strips. A second groove is formed at the bottom of the clamping plate, and a second sliding seat is arranged in the second groove. The second sliding seat is slidably connected to the clamping plate. A number of second springs are fixedly connected to the top of the second sliding seat. The other ends of the second springs are fixedly connected to the clamping plate. A number of balls are rotatably connected to the bottom of the clamping plate.

[0011] According to the above technical solution, the fixed end includes a rotating part and a clamping assembly II. The rotating part includes a support plate fixedly connected to the protection box and a driving part V arranged on the upper part of the support plate close to the protection box. The support plate is connected to the first lead screw by bearings. The driving part V is arranged in a way of meshing transmission of large and small gears. The large and small gears of the driving part V are connected to the support plate by bearings. A connecting seat is fixedly connected to the large gear of the driving part V through a rod. The side part of the connecting seat is fixedly connected to the clamping assembly II. The clamping assembly II is provided with a limiting column fixedly connected to one side of the connecting seat. An arc-shaped limiting groove for restricting the rotation position of the rod and a circular limiting groove for restricting the rotation position of the limiting column are opened on the support plate. The fixed end can clamp and drive the carbon fiber plate to rotate, and obtain the prestress detection result after twisting the carbon fiber plate; The clamping assembly II has the same structure as the clamping assembly I.

[0012] According to the above technical solution, a support part is slidably connected to the guide post. On the one hand, the support part is used to assist in clamping the carbon fiber plate, and on the other hand, it is used to photograph the bottom of the carbon fiber plate to obtain the picture of the bottom of the carbon fiber plate; The support part includes a support seat. A handle is fixedly connected to the outer side of the support seat. A second through groove is arranged at the top of the support seat. A sliding plate is slidably connected to the top of the support seat. A stop block is fixedly connected to the top left of the sliding plate. A pull rod is slidably connected to one side of the sliding plate perpendicular to the length direction of the first lead screw. A limiting hole is opened on the top of the support seat near the handle. The limiting hole is at the same height as the pull rod, and the diameter of the limiting hole matches the diameter of the pull rod. A camera is fixedly connected to the inside of the support seat. The camera is electrically connected to an identification module. The identification module is used to identify and obtain the center line of the carbon fiber plate and the bottom defects in the picture of the bottom of the carbon fiber plate, and then judge the parallel relationship between the center line of the carbon fiber plate and the first lead screw.

[0013] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: In the present invention, by providing a clamping mechanism and a support part, the clamping process during the prestress detection of the carbon fiber plate can be simplified, the clamping stability of the carbon fiber plate can be improved, and at the same time, on the basis of normal prestress detection, the carbon fiber plate can be twisted to obtain the detection result of the prestress of the carbon fiber plate in the twisted state. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The drawings are used to provide a further understanding of the present invention, and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention, and do not constitute a limitation to the present invention. In the drawings: Figure 1 is a partial structural schematic diagram of the present invention; Figure 2 is an overall structural schematic diagram of the present invention; Figure 3Schematic diagram of the clamping mechanism and the support part of the present invention; Figure 4 of the present invention Figure 3 Enlarged structural schematic diagram of area A in Figure 5 Schematic cross-sectional view of the overall structure of the mobile end of the present invention; Figure 6 of the present invention Figure 5 Enlarged structural schematic diagram of area B in Figure 7 Schematic side cross-sectional view of a partial structure of the mobile end of the present invention; Figure 8 Schematic front cross-sectional view of a partial structure of the mobile end of the present invention; Figure 9 Schematic cross-sectional view of the overall structure of the fixed end of the present invention; Figure 10 Exploded schematic diagram of a partial structure of the fixed end of the present invention; Figure 11 of the present invention Figure 1 Enlarged structural schematic diagram of area C in Figure 12 Schematic diagram of the situation of adjusting the position by clamping the carbon fiber plate of the present invention; Figure 13 Schematic diagram of the situation where the number of the first through grooves corresponding to the clamping range and the optimal clamping area is inconsistent in the present invention; In the figure: 1. Detection table; 11. Support; 12. Protection box; 13. Box cover; 2. Driving mechanism; 21. First driving part; 22. First lead screw; 23. Guide post; 3. Clamping mechanism; 31. First clamping component; 32. Second clamping component; 33. Transmission plate; 34. Rotating part; 35. Tensile and compressive sensor; 36. Connecting piece; 3101. Back plate; 3102. Bottom plate; 3103. Top plate; 3104. Clamping plate; 3105. Second driving part; 3106. Second lead screw; 3107. First anti-slip strip; 3108. First sliding seat; 3109. First spring; 3110. Pressure sensor; 3111. Third driving part; 3112. First roller; 3113. Fourth driving part; 3114. Second roller; 3115. Second sliding seat; 3116. Second spring; 3117. Ball; 3118. Second anti-slip strip; 341. Support plate; 342. Fifth driving part; 343. Connecting seat; 344. Limit post; 4. Support part; 41. Support seat; 42. Handle; 43. Slide plate; 44. Pull rod; 45. Camera; 5. Optimal clamping area. Detailed implementation mode

[0015] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0016] Please refer to Figure 1-13 , the present invention provides a technical solution: a prestress detection device for a carbon fiber board, including a detection table 1, a driving mechanism 2 arranged on the left side of the detection table 1, and a clamping mechanism 3 arranged inside the detection table 1. The driving mechanism 2 is used to drive the carbon fiber board on the tension-compression clamping mechanism 3 for prestress detection. The clamping mechanism 3 is used to clamp the carbon fiber board and adjust the clamping position of the carbon fiber board. The detection table 1 is used to provide the conditions for carbon fiber prestress detection and prevent the fragments generated by fracture from causing harm to the staff.

[0017] Furthermore, referring to Figure 2 , the detection table 1 includes a support 11 and a protective box 12 fixed on the top of the support 11. The top of the protective box 12 is hinged with a box cover 13. When the carbon fiber board is subjected to prestress detection, the protective box 12 and the box cover 13 are used to prevent the fragments generated by the tensile fracture of the carbon fiber board from causing harm to the staff. At the same time, on the basis of normal prestress detection, the prestress detection under different environments can be carried out inside the protective box 12, further expanding the application range of the detection device.

[0018] Please refer to Figure 1 , the driving mechanism 2 includes a first driving part 21 and a first lead screw 22. The first driving part 21 is fixed on the bottom surface of one side of the detection table 1. The first driving part 21 preferably adopts a motor-driven belt pulley transmission method. The output end of the first driving part 21 is connected to the first lead screw 22. Both ends of the first lead screw 22 penetrate and are connected to the inner wall of the protective box 12 through bearings. On both sides below the first lead screw 22 inside the protective box 12, guide columns 23 are respectively fixedly connected.

[0019] Please refer to Figure 2-8 , the clamping mechanism 3 includes a mobile end connected to the driving mechanism 2 and a fixed end fixed inside the protective box 12. The mobile end and the fixed end are used to clamp the carbon fiber board, and through the drive of the driving mechanism 2, the prestress detection of the carbon fiber board is carried out; Furthermore, please refer to Figure 1, the mobile end includes a clamping assembly 31 and a tension-compression sensor 35. A lead screw 22 is threadedly connected to a transmission plate 33. The transmission plate 33 is penetrated and slidably connected to a guide post 23. A connecting member 36 is slidably connected to the surface of the transmission plate 33 through a rod. The connecting member 36 is located on the surface of the transmission plate 33 away from the clamping assembly 31. One end of the rod near the clamping assembly 31 is fixedly connected to the clamping assembly 31. The tension-compression sensor 35 is fixed between the clamping assembly 31 and the transmission plate 33; In actual operation, the driving mechanism 2 drives the lead screw 22 to rotate, driving the transmission plate 33 and the clamping assembly 31 to move left and right, stretching or compressing the carbon fiber board, so that the tension-compression sensor 35 fixedly connected between the clamping assembly 31 and the transmission plate 33 can directly measure the tensile or compressive properties of the carbon fiber, thereby obtaining the prestress detection result of the carbon fiber board.

[0020] Please refer to Figure 4 , the clamping assembly 31 includes a back plate 3101, a bottom plate 3102 and a top plate 3103 fixedly connected to the back plate 3101, and a clamping plate 3104 slidably connected to the back plate 3101. A second driving part 3105 is fixedly connected to the top plate 3103. Two groups of lead screws 3106 are connected by bearings between the bottom plate 3102 and the top plate 3103. The lead screws 3106 are threadedly connected to the clamping plate 3104. The second driving part 3105 is connected to the tops of the two groups of lead screws 3106 through a belt drive. The second driving part 3105 is used to drive the lead screws 3106 to rotate synchronously, so as to drive the clamping plate 3104 to approach and move away from the bottom plate 3102, realizing the clamping of the carbon fiber board located between the bottom plate 3102 and the clamping plate 3104; Please refer to Figure 4 - Figure 8 , a plurality of anti-slip strips 3107 are fixedly connected to the top of the bottom plate 3102. A first groove is formed in the bottom plate 3102. A first sliding seat 3108 is arranged in the first groove. The first sliding seat 3108 is slidably connected to the bottom plate 3102. A plurality of first springs 3109 are fixedly connected to the bottom of the first sliding seat 3108. The other ends of the first springs 3109 are fixedly connected to the bottom plate 3102. A pressure sensor 3110 is fixedly connected to the first groove of the bottom plate 3102. A plurality of first through grooves are formed in the first sliding seat 3108; Please refer to Figure 6 - Figure 8, a driving part three 3111 and a driving part four 3113 are fixedly connected to the side of the sliding seat one 3108. A long rotating shaft and several short rotating shafts are arranged at intervals in the first through groove. Only the long rotating shaft or the short rotating shaft is arranged in the same first through groove. Both the long rotating shaft and the short rotating shaft are connected to the sliding seat one 3108 by bearings. A plurality of rollers one 3112 are fixedly connected to the long rotating shaft. The driving part three 3111 is connected to the long rotating shaft by a worm and worm gear transmission method. The driving part three 3111 is used to drive the rollers one 3112 to rotate, so as to move the clamped carbon fiber plate along the direction of the first lead screw 22. A plurality of rollers two 3114 are fixedly connected to the short rotating shaft. The driving part four 3113 is connected to the short rotating shaft by a belt pulley transmission method. The driving part four 3113 is used to drive the rollers two 3114 to rotate, so as to move the clamped carbon fiber plate in a direction perpendicular to the first lead screw 22; Anti-slip layers with a certain thickness and elasticity are arranged on the surfaces of the rollers one 3112 and the rollers two 3114; The pressure sensor 3110 corresponds to the position of the first through groove. The pressure sensor 3110 is preferably a dot matrix pressure sensor. The pressure sensor 3110 is used to detect the force conditions of the rollers one 3112 and the rollers two 3114 when clamping the carbon fiber plate. The pressure sensor 3110 is electrically connected to a pressure module. The pressure module is used to obtain the pressure data detected by the pressure sensor 3110, judge the clamping position of the carbon fiber plate, and control and adjust the clamping position of the carbon fiber plate.

[0021] Please refer to Figure 7 and Figure 8 , a plurality of anti-slip strips two 3118 are fixedly connected to the clamping plate 3104. The anti-slip strips two 3118 correspond to the positions of the anti-slip strips one 3107. A second groove is formed at the bottom of the clamping plate 3104. A sliding seat two 3115 is arranged in the second groove. The sliding seat two 3115 is slidably connected to the clamping plate 3104. A plurality of springs two 3116 are fixedly connected to the top of the sliding seat two 3115. The other ends of the springs two 3116 are fixedly connected to the clamping plate 3104. A plurality of balls 3117 are rotatably connected to the bottom of the clamping plate 3104.

[0022] In actual operation, the staff places the carbon fiber plate on the bottom plate 3102, starts the second driving part 3105 to drive the clamping plate 3104 to approach the bottom plate 3102, and clamps and fixes the carbon fiber plate between the bottom plate 3102 and the clamping plate 3104, so as to ensure that the first clamping assembly 31 tightly clamps the carbon fiber plate; during the clamping process, the first spring 3109 and the second spring 3116 are compressed, and the clamping by the first roller 3112, the second roller 3114 and the ball 3117 becomes the common clamping with the first anti-slip strip 3107 and the second anti-slip strip 3118; due to the certain thickness of the carbon fiber plate and the anti-slip pads are arranged on the surfaces of the first roller 3112 and the second roller 3114, the anti-slip pads on the surfaces of the first roller 3112 and the second roller 3114 above the carbon fiber plate are greatly deformed. Through the interaction of forces, the pressure data detected by the pressure sensor 3110 will be greater than the corresponding pressure data when there is no carbon fiber plate above the first roller 3112 and the second roller 3114; then, drive the clamping plate 3104 to move in the opposite direction to the bottom plate 3102 through the second driving part 3105 to release the tight clamping of the carbon fiber plate, control the third driving part 3111 and the fourth driving part 3113 to start, and realize the adjustment of the position of the end of the carbon fiber plate on the bottom plate 3102, so as to ensure that the carbon fiber plate for prestress detection can maintain the best clamping state and avoid affecting the accuracy of the prestress detection result due to clamping deviation.

[0023] Please refer to Figure 1 , Figure 9 - Figure 10 , the fixed end includes a rotating part 34 and a second clamping assembly 32. The rotating part 34 includes a support plate 341 fixedly connected to the protection box 12 and a fifth driving part 342 arranged on the upper part of the support plate 341 close to the protection box 12. The support plate 341 is connected to the first lead screw 22 by bearings. The fifth driving part 342 is arranged in a way of meshing transmission of large and small gears. The large and small gears of the fifth driving part 342 are connected to the support plate 341 by bearings. A connecting seat 343 is fixedly connected to the large gear of the fifth driving part 342 through a rod. The side part of the connecting seat 343 is fixedly connected to the second clamping assembly 32. The second clamping assembly 32 is provided with a limiting column 344 fixedly connected to one side of the connecting seat 343. An arc-shaped limiting groove for restricting the rotation position of the rod and a circular limiting groove for restricting the rotation position of the limiting column 344 are opened on the support plate 341.

[0024] The second clamping assembly 32 has the same structure as the first clamping assembly 31.

[0025] In actual operation, before or during the prestress detection, control the fifth driving part 342 to start, adjust the rotation angle range of the fifth driving part 342 to drive the connecting seat 343, drive the second clamping assembly 32 to rotate, and on the basis of obtaining the conventional prestress detection result, obtain the prestress detection result after twisting the carbon fiber plate.

[0026] Please refer to Figure 1 andFigure 11 , a support part 4 is slidably connected to the guide pillar 23. On the one hand, the support part 4 is used to assist in clamping the carbon fiber board. On the other hand, it is used to photograph the bottom of the carbon fiber board. The obtained bottom image of the carbon fiber board includes at least the shape and defects of the carbon fiber board, so as to facilitate the subsequent identification to obtain the center line of the carbon fiber board; The support part 4 includes a support base 41. A handle 42 is fixedly connected to the outer side of the support base 41. A second through groove is provided at the top of the support base 41. A slide plate 43 is slidably connected to the top of the support base 41. A stop block is fixedly connected to the top left side of the slide plate 43. A pull rod 44 is slidably connected to one side of the slide plate 43 perpendicular to the length direction of the first lead screw 22. A limiting hole is provided near the handle 42 at the top of the support base 41. The limiting hole is at the same height as the pull rod 44, and the diameter of the limiting hole matches the diameter of the pull rod 44. A camera 45 is fixedly connected inside the support base 41. The slide plate 43 is used to protect the camera 45. The camera 45 is electrically connected to an identification module. The identification module is used to identify and obtain the center line and bottom defects of the carbon fiber board in the bottom image of the carbon fiber board, and then judge the parallel relationship between the center line of the carbon fiber board and the first lead screw 22.

[0027] In actual operation, the staff first pulls the pull rod 44 along the direction perpendicular to the length of the first lead screw 22, pulls the pull rod 44 out of the limiting hole, releases the position restriction between the slide plate 43 and the support base 41, and then pulls the pull rod 44 along the length direction of the first lead screw 22 to pull the slide plate 43 out of the top of the support base 41, so that there is no blockage above the camera 45; Then the staff places the carbon fiber board on the top of the support base 41, pulls the handle 42 to drive the carbon fiber board to move along the length direction of the first lead screw 22, and initially clamps the carbon fiber board on the first clamping assembly 31 and the second clamping assembly 32. After the initial clamping is completed, the staff pulls the handle 42 to drive the support base 41 to move from one end of the carbon fiber board to the other end, so that the camera 45 photographs the bottom of the carbon fiber board.

[0028] Detection method of the carbon fiber board prestress detection device: Step 1: Clamp the carbon fiber board, pre-clamp the carbon fiber board until the pressure module obtains pressure data with a pressure difference, obtain the actual clamping range at the end of the carbon fiber board, the identification module identifies the bottom image of the carbon fiber board, obtains the parallel relationship between the carbon fiber board and the first lead screw 22 and the bottom defects, and the clamping mechanism 3 adjusts the clamping position of the carbon fiber board in combination with the data obtained by the pressure module and the identification module; S1: Pre - clamping, determining the parallel relationship between the carbon fiber board and the first lead screw 22, and the actual clamping position of the end of the carbon fiber board: The staff uses the supporting part 4 to assist in clamping the carbon fiber board, and controls the second driving part 3105 to start driving the clamping plate 3104 to approach the bottom plate 3102, clamping the carbon fiber board until the pressure data obtained by the pressure module is within the set range. The pressure module obtains the actual clamping range of the end of the carbon fiber board according to the position with an obvious pressure difference. Then, the staff pulls the supporting part 4 to drive the camera 45 to photograph the bottom of the carbon fiber board, and the recognition module recognizes and obtains the parallel relationship between the carbon fiber board and the first lead screw 22 and the bottom defects in the bottom image.

[0029] The pressure module is set with a pressure range set during pre - clamping, the best clamping area 5 of the carbon fiber board, and the pressure difference for determining the actual clamping range of the end of the carbon fiber board. The pressure range is (F1, F2), and the pressure difference is denoted as , the best clamping area 5 corresponds to the number and width of the first through - slots on the first sliding seat 3108. The best clamping area 5 is the best clamping position that can keep the carbon fiber board clamped stably and the test results accurate during the prestress test of the carbon fiber board; The pressure module obtains multiple groups of pressure data corresponding to the first roller 3112 and the second roller 3114 and determines the actual clamping range of the end of the carbon fiber board. The pressure data corresponding to the first roller 3112 is denoted as f in , the pressure data corresponding to the second roller 3114 is denoted as f im , i is the serial number of the first through - slot, n is the serial number corresponding to the first roller 3112, m is the serial number corresponding to the second roller 3114, i ∈ [1, I], I is the total serial number of the first through - slots, and the serial numbers of the first through - slots are arranged from the direction away from the back plate 3101 to the direction close to the back plate 3101. Since the long rotating shaft and several short rotating shafts are arranged at intervals in the first through - slot, and only the long rotating shaft or the short rotating shaft is set in the same first through - slot, when the long rotating shaft is set in the first through - slot where i is odd, the short rotating shaft is set in the first through - slot where i is even. n ∈ [1, N], N is the total serial number of the first rollers 3112 in a single first through - slot, m ∈ [1, M], M is the total serial number of the second rollers 3114 in a single first through - slot, and the numbers of N and M can be the same or different.

[0030] Among the pressure data f in , f im ∈ (F1, F2), i ∈ [1, I], n ∈ [1, N], m ∈ [1, M], the pre - clamping is completed; if any group of pressure data f in , f im ∉ (F1, F2), i ∈ [1, I], n ∈ [1, N], m ∈ [1, M], the pressure module gives an alarm prompt to avoid the carbon fiber board with abnormal clamping or the abnormal clamping component 31 causing abnormal clamping of the carbon fiber board and affecting the prestress test results of the carbon fiber board; Specifically, the method for determining the actual clamping range at the end of the carbon fiber board is as follows: The pressure module obtains multiple sets of pressure data and compares adjacent pressure data. The adjacent pressure data are the pressure values of the first roller 3112 and the second roller 3114 directly adjacent and cross-adjacent in the front, rear, left, and right directions. When the difference between adjacent actual pressure values is greater than ∆f, the position with the larger pressure value corresponds to the contour of the clamped range of the carbon fiber board, and the difference between any two adjacent actual pressure values on either side of this contour is less than 0.5 When this is the case, the side with the larger actual pressure value of this contour is the actual clamped range of the carbon fiber board.

[0031] S2: Adjust the clamping position: Specifically, the staff pulls the support part 4 to drive the camera 45 to photograph the bottom of the carbon fiber board and feedback it to the recognition module; when the recognition module recognizes that there are defects in the carbon fiber board, an alarm prompt is given, and the staff stops starting the drive mechanism 2 to drive the carbon fiber board on the stretching and clamping mechanism 3 to perform the prestress test, that is, the drive mechanism 2 stops driving the transmission plate 33 to drive the first clamping component 31 to move away from the second clamping component 32; the defects include but are not limited to cracks, impurities, convex deformations, etc.; For carbon fiber boards without defects, the recognition module further recognizes and obtains the center line of the carbon fiber board and judges the parallel relationship between the center line and the first lead screw 22.

[0032] When the center line of the carbon fiber board coincides with the center line of the first lead screw 22, and the clamping ranges at both ends of the carbon fiber board are both within the optimal clamping area 5 and the number of through slots 1 corresponding to the clamping range is the same as that of the optimal clamping area 5, the clamping position of the carbon fiber board is the optimal clamping position, and normal prestress detection of the carbon fiber board can be carried out. In other cases, position adjustment is required.

[0033] It should be noted that the actual clamping range is within the optimal clamping area 5, and the number of complete through slots 1 corresponding to the actual clamping range in the width direction of the carbon fiber board is the same as the number of through slots 1 corresponding to the optimal clamping area 5; if there are corresponding local through slots 1 in the corresponding width direction, it does not belong to the case where the number of through slots 1 corresponding to the actual clamping range is the same as that of the optimal clamping area 5. Exemplarily, as Figure 13 shown, the number of through slots 1 corresponding to the optimal clamping area 5 is four, and the fourth through slot 1 corresponding to the actual clamping range from left to right is incomplete in the width direction of the carbon fiber board, that is, the number of through slots 1 corresponding to the actual clamping range at the end of the carbon fiber board is inconsistent with that of the optimal clamping area 5.

[0034] When the center line of the carbon fiber board does not coincide with the center line in the length direction of the first lead screw 22, that is, there is a skew angle, this skew angle is an acute angle. Please refer to Figure 12, the clamped carbon fiber plate is in a skewed state, and the clamping assembly one 31 at the mobile end and the clamping assembly two 32 at the fixed end are both changed to a non-clamping state, that is, the driving part two 3105 drives the clamping plate 3104 away from the bottom plate 3102, so that the ball 3117 does not contact the carbon fiber plate. After that, the driving part four 3113 on the clamping assembly one 31 at the mobile end and the clamping assembly two 32 at the fixed end is started, and the driving roller two 3114 is driven to rotate in the opposite direction of the inclined direction, and the carbon fiber plate is moved in a direction perpendicular to the lead screw one 22. The moving distance is set according to the actual angle and the length of the carbon fiber plate to be detected; if the center line of the carbon fiber plate is parallel to the center line of the lead screw one 22 but not coincident, the driving part four 3113 on the clamping assembly one 31 and the clamping assembly two 32 at the mobile end is started at the same time, and the driving roller two 3114 is driven to rotate towards one side of the lead screw one 22, and the carbon fiber plate is moved in a direction perpendicular to the lead screw one 22. The moving distance is the distance difference between the center line and the center line of the lead screw one 22. After the movement is completed, this step can be repeated, but only twice; When the clamping ranges at both ends of the carbon fiber plate are located within the optimal clamping area 5, but the number of the corresponding through slots one in the clamping range is inconsistent with that in the optimal clamping area 5, the clamping assembly one 31 at the mobile end and the clamping assembly two 32 at the fixed end are both changed to a non-clamping state. First, the driving part three 3111 on the clamping assembly one 31 at the mobile end is started, and the driving roller one 3112 is driven to rotate, and the carbon fiber plate is moved in a direction parallel to the lead screw one 22. After that, the clamping assembly one 31 at the mobile end is changed to a light clamping state, that is, the driving part two 3105 drives the clamping plate 3104 to approach the bottom plate 3102, so that the ball 3117 contacts the carbon fiber plate, and then the driving mechanism 2 drives the mobile end to move, driving the carbon fiber plate to adjust the moving distance on the clamping assembly two 32. The moving distance is adjusted according to the actual difference in the number of the corresponding through slots one and the width of the corresponding through slot one. After the movement is completed, this step can be repeated, but only twice; Even after adjustment and re-detection in the above manner, when the end of the carbon fiber plate still cannot meet the clamping conditions for normal prestress detection of the carbon fiber plate, the pressure module gives an alarm prompt, and the staff checks again whether the shape of the specimen meets the standard.

[0035] Step two: Stretch and twist the carbon fiber plate, and select and determine the prestress test method; Method one: The driving mechanism 2 drives the mobile end to clamp the carbon fiber plate and move away from the fixed end to conduct a prestress test. The tensile and compressive properties detected by the tensile and compressive sensor 35 are used to obtain the prestress detection result of the carbon fiber; Method two: After the rotating part 34 at the fixed end drives the clamping assembly two 32 to rotate a certain angle, the driving mechanism 2 drives the mobile end to clamp the carbon fiber plate and move away from the fixed end to conduct a prestress test after the carbon fiber is twisted; Method 3: ① The rotating part 34 of the fixed end drives the clamping assembly II 32 to rotate a certain angle in a reciprocating motion; ② The driving mechanism 2 drives the mobile end to clamp the carbon fiber plate and move away from the fixed end; by performing these two operations simultaneously or successively, the prestress detection result during the torsion of the carbon fiber plate can be obtained. After the test, it is also possible to move the support part 4, and through the camera 45 to take pictures and the image recognition of the recognition module, the deformation condition of the carbon fiber plate after the prestress test can be obtained, so as to obtain the anti-deformation ability of the carbon fiber plate.

[0036] It should be noted that in actual use, the support part 4 can be changed to move along the direction of the first lead screw 22 in a non-manually driven manner, which can be a linear motor drive mode.

[0037] Through the above method, the clamping steps of the staff when detecting the prestress of the carbon fiber plate are simplified. Through the self-adjustment of this device, it can ensure that the clamped carbon fiber plate is in the best clamping state, and it can also increase the torsion on the basis of normal prestress detection to obtain the prestress detection result after twisting the carbon fiber plate.

[0038] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0039] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A prestress detection device for a carbon fiber board, comprising a detection table (1), a driving mechanism (2) arranged on the left side of the detection table (1), and a clamping mechanism (3) arranged inside the detection table (1), characterized in that, The driving mechanism (2) is used to drive the carbon fiber board on the tension-compression clamping mechanism (3) for prestress detection, and the clamping mechanism (3) is used to clamp the carbon fiber board and adjust the clamping position of the carbon fiber board; The clamping mechanism (3) includes a mobile end and a fixed end. The mobile end includes a first clamping component (31) and a tension-compression sensor (35). The first clamping component (31) includes a back plate (3101), a bottom plate (3102) and a top plate (3103) fixedly connected to the back plate (3101), and a clamping plate (3104) slidably connected to the back plate (3101); A first groove is formed in the bottom plate (3102), a first sliding seat (3108) is arranged in the first groove, the first sliding seat (3108) is slidably connected to the bottom plate (3102), a pressure sensor (3110) is fixedly connected in the first groove of the bottom plate (3102), and a plurality of first through grooves are formed in the first sliding seat (3108); A third driving part (3111) and a fourth driving part (3113) are fixedly connected to the side of the first sliding seat (3108). A long rotating shaft and a plurality of short rotating shafts are arranged at intervals in the first through groove. Only the long rotating shaft or the short rotating shaft is arranged in the same first through groove. Both the long rotating shaft and the short rotating shaft are connected to the first sliding seat (3108) through bearings. A plurality of first rollers (3112) are fixedly connected to the long rotating shaft, and a second roller (3114) is fixedly connected to the short rotating shaft; The pressure sensor (3110) corresponds to the position of the first through groove. The pressure sensor (3110) is electrically connected to a pressure module. The pressure module is used to obtain the pressure data detected by the pressure sensor (3110) and judge the clamping position of the carbon fiber board.

2. The prestress detection device for a carbon fiber board according to claim 1, characterized in that, The detection table (1) includes a support (11) and a protective box (12) fixed to the top of the support (11). A box cover (13) is hinged to the top of the protective box (12).

3. The prestress detection device for a carbon fiber board according to claim 2, characterized in that, The driving mechanism (2) includes a first driving part (21) and a first lead screw (22). The first driving part (21) is fixed to the bottom surface of one side of the detection table (1). The output end of the first driving part (21) is connected to the first lead screw (22). Both ends of the first lead screw (22) penetrate and are connected to the inner wall of the protective box (12) through bearings. Guide columns (23) are respectively fixedly connected to both sides of the protective box (12) below the first lead screw (22).

4. The prestress detection device for a carbon fiber board according to claim 3, wherein, The first lead screw (22) is threadedly connected to a transmission plate (33). The transmission plate (33) penetrates and is slidably connected to the guide column (23). A connecting piece (36) is slidably connected to the surface of the transmission plate (33) through a rod. The connecting piece (36) is located on the surface of the transmission plate (33) away from the first clamping component (31). One end of the rod close to the first clamping component (31) is fixedly connected to the first clamping component (31). The tension-compression sensor (35) is fixed between the first clamping component (31) and the transmission plate (33).

5. The prestress detection device for a carbon fiber board according to claim 4, characterized in that, A second driving part (3105) is fixedly connected to the top plate (3103). Two sets of second lead screws (3106) are connected between the bottom plate (3102) and the top plate (3103) in a bearing manner. The second lead screws (3106) are in threaded connection with the clamping plates (3104). A number of first anti-slip strips (3107) are fixedly connected to the top of the bottom plate (3102). A number of first springs (3109) are fixedly connected to the bottom of the first sliding seat (3108). The other ends of the first springs (3109) are fixedly connected to the bottom plate (3102). Anti-slip layers with a certain thickness and elasticity are provided on the surfaces of the first roller (3112) and the second roller (3114).

6. The prestress detection device for a carbon fiber board according to claim 5, wherein A number of second anti-slip strips (3118) are fixedly connected to the clamping plates (3104). The second anti-slip strips (3118) correspond to the positions of the first anti-slip strips (3107). A second groove is formed at the bottom of the clamping plate (3104). A second sliding seat (3115) is arranged in the second groove. The second sliding seat (3115) is slidably connected to the clamping plate (3104). A number of second springs (3116) are fixedly connected to the top of the second sliding seat (3115). The other ends of the second springs (3116) are fixedly connected to the clamping plate (3104). A number of balls (3117) are rotatably connected to the bottom of the clamping plate (3104).

7. The prestress detection device for a carbon fiber board according to claim 6, wherein, The fixed end includes a rotating part (34) and a second clamping assembly (32). The rotating part (34) includes a support plate (341) fixedly connected to the protection box (12) and a fifth driving part (342) arranged on the upper part of the side of the support plate (341) close to the protection box (12). The support plate (341) is in bearing connection with the first lead screw (22). The fifth driving part (342) is arranged in a way of meshing transmission of large and small gears. The large and small gears of the fifth driving part (342) are in bearing connection with the support plate (341). A connecting seat (343) is fixedly connected to the large gear of the fifth driving part (342) through a rod. The side part of the connecting seat (343) is fixedly connected to the second clamping assembly (32). A limiting column (344) is fixedly connected to one side of the second clamping assembly (32) where the connecting seat (343) is arranged. An arc-shaped limiting groove for restricting the rotation position of the rod and a circular limiting groove for restricting the rotation position of the limiting column (344) are formed on the support plate (341). The second clamping assembly (32) has the same structure as the first clamping assembly (31).

8. The prestress detection device for a carbon fiber board according to claim 7, wherein, A support part (4) is slidably connected to the guide post (23). The support part (4) is used for assisting in clamping the carbon fiber board on one hand and for photographing the bottom of the carbon fiber board to obtain the picture of the bottom of the carbon fiber board on the other hand. The support part (4) includes a support base (41). A handle (42) is fixedly connected to the outer side of the support base (41). A second through groove is provided at the top of the support base (41). A sliding plate (43) is slidably connected to the top of the support base (41). A stop block is fixedly connected to the top left of the sliding plate (43). A pull rod (44) is slidably connected to one side of the sliding plate (43) perpendicular to the length direction of the first lead screw (22). A limiting hole is formed in the top of the support base (41) near the handle (42). The limiting hole is at the same height as the pull rod (44). The diameter of the limiting hole matches the diameter of the pull rod (44). A camera (45) is fixedly connected inside the support base (41). The camera (45) is electrically connected to an identification module. The identification module is used to identify and obtain the center line and bottom defects of the carbon fiber board in the bottom image of the carbon fiber board, and then judge the parallel relationship between the center line of the carbon fiber board and the first lead screw (22).

9. A detection method of a carbon fiber board prestress detection device is implemented based on a carbon fiber board prestress detection device described in claim 8, characterized in that, The method is as follows: Step 1: Clamp the carbon fiber board. Pre-clamp the carbon fiber board until the pressure module obtains pressure data with a pressure difference, so as to obtain the actual clamping range at the end of the carbon fiber board. The identification module identifies the bottom image of the carbon fiber board, obtains the parallel relationship between the carbon fiber board and the first lead screw (22) and the bottom defects. The clamping mechanism (3) adjusts the clamping position of the carbon fiber board in combination with the data obtained by the pressure module and the identification module; Step 2: Stretch and twist the carbon fiber board, and select and determine the pre-stress test method.

10. The detection method of a carbon fiber board prestress detection device according to claim 9, characterized in that, The pressure module is provided with a pressure range set during pre-clamping, an optimal clamping area (5) of the carbon fiber board, and a pressure difference for determining the actual clamping range at the end of the carbon fiber board. The pressure range is (F1, F2), and the pressure difference is denoted as ; The method for determining the actual clamping range at the end of the carbon fiber plate is as follows: The pressure module obtains multiple groups of pressure data, and compares adjacent pressure data. The adjacent pressure data are the pressure values of the directly adjacent and cross-adjacent roller one (3112) and roller two (3114) before, after, left, and right. When the difference between adjacent actual pressure values is greater than At this time, the position with the larger pressure value corresponds to the contour of the clamped range of the carbon fiber plate, and the difference between any adjacent actual pressure values on both sides of the contour is less than 0.5 At this time, the side with the larger actual pressure value of the contour is the actual clamped range of the carbon fiber plate.

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