Laser flatness detection device for capping beam template production

Abstract

The invention discloses a laser flatness detection device for capping beam template production, and relates to the technical field of flatness detection.The laser flatness detection device comprises a base and a supporting seat, a fitting mechanism is arranged at the bottom end of a connecting shell, conductive rubber is fixedly connected to the inner side of the fitting mechanism, and a capping beam template placed on the base is arranged below the conductive rubber; one end of the connecting shell is fixedly connected with an adjusting mechanism, the detection method is not affected by the surface characteristics of the cover beam formwork, the detection precision is improved, meanwhile, defects (such as cavities and cracks) in the cover beam formwork can be detected, and therefore tiny hidden dangers affecting the performance of the cover beam formwork can be found easily; and meanwhile, the conductive rubber and the capping beam template can be tightly and stably attached through the arranged attaching mechanism, so that a contact gap is effectively eliminated, stable signal transmission in the measurement process is ensured, and the accuracy of potential difference measurement is greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of flatness detection, and particularly to a laser flatness detection device for the production of pier cap forms. Background Art

[0002] A pier cap form is a kind of mold used for the casting construction of pier caps in highway and railway bridge construction. A pier cap is a transverse load-bearing structure at the top of a pier column, which is used to support the upper structure of the bridge (such as bridge deck, beam body, etc.). During production, in order to ensure the forming quality during the later concrete casting, ensure uniform structural stress, and avoid leakage of mortar, etc., it is necessary to detect the flatness of the pier cap form.

[0003] At present, the flatness of pier cap forms is usually detected by laser scanning. Traditional laser scanning detection methods are very sensitive to surface characteristics. The reflectivity, color, roughness, etc. of the form surface will affect the measurement results, resulting in errors in the measurement results. At the same time, traditional laser scanning detection methods can only detect surface flatness and cannot detect internal defects (such as cavities, cracks, etc.) of the form, and cannot timely discover subtle hidden dangers that affect the performance of the pier cap form. Therefore, in view of the above problems, a laser flatness detection device for the production of pier cap forms is proposed. Summary of the Invention

[0004] The purpose of the present invention is to provide a laser flatness detection device for the production of pier cap forms to solve the problems in the background art.

[0005] To achieve the above purpose, the technical solution adopted by the present invention is as follows: A laser flatness detection device for the production of pier cap forms, including a base and a support seat. The top end of the base is fixedly connected with a support seat. The inside of the support seat is fixedly connected with a third cylinder. The bottom end of the third cylinder is fixedly connected with a connection shell. The bottom end of the connection shell is provided with a fitting mechanism. The inside of the fitting mechanism is fixedly connected with conductive rubber. Below the conductive rubber is a pier cap form placed on the base. One end of the connection shell is fixedly connected with an adjusting mechanism. One end of the adjusting mechanism is fixedly connected with an output head. One end of the output head is fixedly connected with an optical fiber. The other end of the optical fiber is fixedly connected with a laser. One end of the laser is fixedly connected with a tensioning mechanism, and the tensioning mechanism is fixedly connected with the connection shell. One end of the conductive rubber is fixedly connected with a wire. The other end of the wire is connected with a signal amplifier through an input end. The output end of the signal amplifier is connected with a potential difference measuring instrument through a transmission line. One end of the support seat is fixedly connected with a computer.

[0006] Preferably, the fitting mechanism includes a fixing plate fixedly connected to the connection shell. A guiding shaft is slidably connected to the inner side of the fixing plate. The bottom end of the guiding shaft is fixedly connected to a guiding frame. A sealing ring is fixedly connected to the outer side of the guiding frame, and the guiding frame is slidably connected to the connection shell through the sealing ring. The conductive rubber is fixedly connected to the guiding frame. A spring is arranged on the outer side of the guiding shaft, and both ends of the spring are fixedly connected to the fixing plate and the guiding frame respectively. A pressure sensor and an air inlet pipe are fixedly connected to the top end of the connection shell, and an electromagnetic valve is fixedly connected to the outer side of the air inlet pipe.

[0007] Preferably, the tensioning mechanism includes a connection frame fixedly connected to the connection shell. One end of the connection frame is fixedly connected to a second cylinder. One end of the second cylinder is fixedly connected to a tensioning block. A tensioning shell adapted to the tensioning block is arranged on one side of the tensioning block, and the tensioning shell is fixedly connected to the connection frame. The optical fiber passes through between the tensioning shell and the tensioning block.

[0008] Preferably, the tensioning block is semicircularly arranged, and the radian of the tensioning block is greater than the bending radian of the optical fiber.

[0009] Preferably, the adjusting mechanism includes a first cylinder fixedly connected to the connection shell. The other end of the first cylinder is fixedly connected to a fixing frame. One end of the fixing frame is fixedly connected to a motor. The end of the main shaft of the motor is fixedly connected to a screw rod, and the screw rod is rotatably connected to the fixing frame. A slider is helically connected to the outer side of the screw rod, and the slider is slidably connected to the fixing frame. The slider is fixedly connected to the output head.

[0010] Preferably, a first photoelectric distance sensor and a second photoelectric distance sensor are respectively fixedly connected to the end of the fixing frame close to the motor, and the axis of the first photoelectric distance sensor is parallel to the screw rod, and the axis of the second photoelectric distance sensor is perpendicular to the screw rod.

[0011] Preferably, the periphery of the connection shell is convexly arranged, and a compensation groove is opened inside the convex part.

[0012] Preferably, scale lines are arranged on the top end of the base.

[0013] Preferably, fixing blocks are arranged on both sides of the vertical center line of the capping beam formwork. One end of each fixing block is fixedly connected to a fourth cylinder. The other end of the fourth cylinder is fixedly connected to a clamping plate, and the clamping plate clamps the capping beam formwork together.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. Laser flatness detection device for production of pier cap formwork. By means of the laser, optical fiber, output head, potential difference measuring instrument and conductive rubber provided, the system focuses and irradiates the surface of the pier cap formwork with high-energy pulsed laser, instantaneously exciting plasma and generating local potential difference. When the laser energy penetrates into the interior of the pier cap formwork, if there are defects such as cavities, cracks, inclusions, etc. inside the pier cap formwork, the propagation characteristics of the laser in the interior of the pier cap formwork will change. This will not only affect the generation process of plasma on the formwork surface, but also make the local potential difference signal show characteristics different from the defect-free state. The conductive rubber evenly covers the formwork surface, conducts the potential difference signal containing internal defect information to the differential signal amplifier, and after eliminating high-frequency noise through RC filtering, it is quantified by a high-precision potential difference measuring instrument. The computer synchronously controls the laser scanning path (feedback through an encoder, timing error < 1 ms), and processes data in real time: first, remove the baseline drift, and then use a pre-constructed calibration curve that comprehensively considers the influence of internal defects (the relationship between ΔV - Δh and the correlation between internal defect characteristics and potential difference changes) to convert the potential difference into height values and identify the internal defect conditions. Finally, a detection report covering the 3D topography map of the formwork surface and containing parameters such as RMS roughness is generated, and at the same time, the location, type and severity of internal defects are clearly marked in the report. This detection method is not affected by the surface characteristics of the pier cap formwork, improves the detection accuracy, and can also detect internal defects (such as cavities, cracks, etc.) in the pier cap formwork, thus facilitating the discovery of subtle hidden dangers affecting the performance of the pier cap formwork.

[0015] 2. Laser flatness detection device for production of pier cap formwork. The provided fitting mechanism can prompt the conductive rubber to fit tightly and firmly with the pier cap formwork, thereby effectively eliminating the contact gap, ensuring stable signal transmission during the measurement process, and greatly improving the accuracy of potential difference measurement.

[0016] 3. Laser flatness detection device for production of pier cap formwork. The provided adjustment mechanism can make the output head irradiate the pier cap formwork in an orderly manner, thereby realizing the detection of the overall flatness of the pier cap formwork surface.

[0017] 4. Laser flatness detection device for production of pier cap formwork. The provided tensioning mechanism can be adjusted in real time dynamically to ensure that the optical fiber is always within a safe bending arc range during the movement of the output head. It can effectively avoid excessive bending of the optical fiber caused by the movement of the output head, reduce the risk of loss and damage caused by excessive bending, and greatly improve the service life and working stability of the optical fiber. Description of the Drawings

[0018] 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.

[0019] Figure 1 It is a schematic diagram of the overall structure of the laser flatness detection device for the production of bent cap formwork of the present invention.

[0020] Figure 2 It is a schematic diagram of the installation structure of the laser of the laser flatness detection device for the production of bent cap formwork of the present invention.

[0021] Figure 3 It is a schematic diagram of the internal sectional structure of the connection shell of the laser flatness detection device for the production of bent cap formwork of the present invention.

[0022] Figure 4 It is a schematic diagram of the installation structure of the conductive rubber of the laser flatness detection device for the production of bent cap formwork of the present invention.

[0023] Figure 5 It is a schematic diagram of the installation structure of the tensioning block of the laser flatness detection device for the production of bent cap formwork of the present invention.

[0024] Figure 6 For the laser flatness detection device for the production of bent cap formwork of the present invention Figure 3 Schematic diagram of the structure at position A.

[0025] Figure 7 For the laser flatness detection device for the production of bent cap formwork of the present invention Figure 4 Schematic diagram of the installation structure at position B.

[0026] Figure 8 It is a schematic diagram of the installation structure of the wire of the laser flatness detection device for the production of bent cap formwork of the present invention.

[0027] In the figure: 1. Fitting mechanism; 101. Guide frame; 102. Sealing ring; 103. Fixed plate; 104. Guide shaft; 105. Spring; 106. Pressure sensor; 107. Air inlet pipe; 108. Solenoid valve; 2. Adjusting mechanism; 201. First cylinder; 202. Fixed frame; 203. Motor; 204. Screw; 205. Slide block; 206. First photoelectric distance sensor; 207. Second photoelectric distance sensor; 3. Tensioning mechanism; 301. Connection frame; 302. Second cylinder; 303. Tensioning block; 304. Tensioning shell; 4. Laser; 5. Optical fiber; 6. Output head; 7. Potential difference measuring instrument; 8. Wire; 9. Base; 10. Support base; 11. Third cylinder; 12. Connection shell; 13. Compensation groove; 14. Scale line; 15. Fixed block; 16. Fourth cylinder; 17. Clamp; 18. Computer; 19. Conductive rubber; 20. Signal amplifier; 21. Girder formwork. Detailed implementation manners

[0028] The present invention will be further described below in conjunction with the detailed implementation manners. Among them, the attached drawings are only for illustrative purposes, showing only schematic diagrams, rather than physical diagrams, and should not be construed as a limitation to the present invention. In order to better illustrate the detailed implementation manners of the present invention, some components in the attached drawings will be omitted, enlarged or reduced, which does not represent the dimensions of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the attached drawings may be omitted. Based on the detailed implementation manners in the present invention, all other detailed implementation manners obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0029] In order to make the technical means, creative features, achieved purposes and effects of the present invention easy to understand, in the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the attached drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and should not be construed as indicating or implying relative importance. The present invention will be further described below in conjunction with the detailed implementation manners.

[0030] Embodiment

[0031] As Figures 1 - 8As shown, a laser flatness detection device for coping beam formwork production includes a base 9 and a support base 10. A support base 10 is fixedly connected to the top end of the base 9. A third cylinder 11 is fixedly connected to the inner side of the support base 10. A connection shell 12 is fixedly connected to the bottom end of the third cylinder 11. A fitting mechanism 1 is arranged at the bottom end of the connection shell 12. The third cylinder 11 is communicated with an external air source, and the third cylinder 11 can drive the fitting mechanism 1 to move in the vertical direction through the connection shell 12, so that the fitting mechanism 1 is fitted with the coping beam formwork 21. A conductive rubber 19 is fixedly connected to the inner side of the fitting mechanism 1. Array micropores are processed on the conductive rubber 19. The micropore diameter is 50μm - 200μm, and the spacing is 1mm, ensuring that the laser transmittance > 90%. The thickness of the conductive rubber 19 is between 0.5 mm and 2 mm, and the micropore area is locally thinned to 0.1mm - 0.3mm to ensure laser transmission, and the resistance < 1Ω / sq. In this way, it can not only ensure that the laser irradiates the coping beam formwork 21 through the micropores, instantaneously excite the plasma to generate a local potential difference, but also ensure that the conductive rubber 19 maintains the potential difference detection function. There is a coping beam formwork 21 placed on the base 9 below the conductive rubber 19. One end of the connection shell 12 is fixedly connected to an adjustment mechanism 2. One end of the adjustment mechanism 2 is fixedly connected to an output head 6. One end of the output head 6 is fixedly connected to an optical fiber 5. The other end of the optical fiber 5 is fixedly connected to a laser 4. The type of the laser 4 can be selected according to the material absorption characteristics. For example, when detecting a coping beam formwork 21 made of metal material, a YAG laser (1064nm) can be selected, which has high energy and can penetrate deep into the coping beam formwork 21. The laser 4 irradiates the surface of the coping beam formwork 21 through the optical fiber 5 and the output head 6. One end of the laser 4 is fixedly connected to a tensioning mechanism 3, and the tensioning mechanism 3 is fixedly connected to the connection shell 12. One end of the conductive rubber 19 is fixedly connected to a wire 8. The wire 8 is of low resistance (the conductive material performance: silver-plated copper wire > oxygen-free copper wire > aluminum wire), strong shielding (the shielding layer is aluminum foil + braided mesh) and high temperature resistance (the insulating layer is made of PTFE or PE material). For example, a silver-plated copper core (resistivity ≈ 1.6×10 -8 Ω·m) plus a double-layer shielded wire is selected. The other end of the wire 8 is connected to a signal amplifier 20 through an input end. The output end of the signal amplifier 20 is connected to a potential difference measuring instrument 7 through a transmission line. One end of the support base 10 is fixedly connected to a computer 18. The signal amplifier 20 can be a differential amplifier or a programmable gain amplifier. The potential difference measuring instrument 7 is recommended to select an ADC with 24-bit resolution and a sampling rate ≥ 10kS / s. At the same time, the output end of the potential difference measuring instrument 7 is connected to a signal acquisition card. The data acquisition card is used to convert the analog signal output by the potential difference measuring device into a digital signal and transmit it to the computer 18 for processing. The computer 18 needs to have sufficient computing power and storage space, and install special data processing software, such as LabVIEW, MATLAB, etc., for real-time processing and analysis of the collected data, calculating the flatness, and generating a detection report; The system irradiates the surface of the bent cap formwork 21 through the array of micro-holes opened in the conductive rubber 19 by focusing with the laser 4, optical fiber 5, and output head 6, instantaneously exciting plasma and generating a local potential difference. When the laser energy penetrates into the interior of the bent cap formwork 21, if there are defects such as voids, cracks, and inclusions in the interior of the bent cap formwork 21, the propagation characteristics of the laser in the interior of the bent cap formwork 21 will change. This will not only affect the generation process of the plasma on the surface of the bent cap formwork 21, but also make the local potential difference signal exhibit characteristics different from those in the defect-free state. The conductive rubber 19 uniformly covers the surface of the formwork, conducts the potential difference signal containing the internal defect information to the differential signal amplifier 20, and after eliminating high-frequency noise through RC filtering, it is quantified by the high-precision potentiometer 7. The computer 18 synchronously controls the laser scanning path (feedback through the encoder, timing error < 1 ms), and processes the data in real time: first, remove the baseline drift, and then use the pre-constructed calibration curve that comprehensively considers the influence of internal defects (the relationship between ΔV - Δh and the correlation between the internal defect characteristics and the change in potential difference). The computer 18 distinguishes the surface flatness signal from the internal defect characteristics through a convolutional neural network (CNN) with a positioning accuracy of ±1 mm, converts the potential difference into a height value, and identifies the internal defect condition. Finally, a detection report covering the 3D topography map of the formwork surface and including parameters such as RMS roughness is generated, and at the same time, the location, type, and severity of the internal defects are clearly marked in the report. This detection method is not affected by the surface characteristics of the bent cap formwork 21, improves the detection accuracy, and can also detect the internal defects (such as voids, cracks, etc.) of the bent cap formwork 21, thus facilitating the discovery of subtle hidden dangers affecting the performance of the bent cap formwork 21.

[0032] As a further improvement of the present invention, as Figure 1 , Figure 2 , Figure 3 and Figure 4As shown in the figure, the fitting mechanism 1 includes a fixing plate 103 fixedly connected to the connecting shell 12. A guiding shaft 104 is slidably connected to the inner side of the fixing plate 103. The bottom end of the guiding shaft 104 is fixedly connected to a guiding frame 101. A sealing ring 102 is fixedly connected to the outer side of the guiding frame 101. The guiding frame 101 is slidably connected to the connecting shell 12 through the sealing ring 102. The sealing ring 102 is made of wear-resistant rubber material, such as nitrile rubber (NBR) or polyurethane (PU), which has both sealing and flexible guiding functions. Through an interference fit (interference amount 0.1 - 0.3 mm) with the connecting shell 12, on the one hand, it can effectively ensure the sealing between the guiding frame 101 and the connecting shell 12, prevent gas leakage, and maintain the stable air pressure inside the connecting shell 12. On the other hand, relying on its own flexibility, the guiding frame 101 can move relatively smoothly in the connecting shell 12 with the help of the sealing ring 102. The conductive rubber 19 is fixedly connected to the guiding frame 101. The bottom of the conductive rubber 19 protrudes from the bottom of the guiding frame 101, which is convenient for the conductive rubber 19 to be closely attached to the capping beam formwork 21. A spring 105 is arranged on the outer side of the guiding shaft 104, and both ends of the spring 105 are fixedly connected to the fixing plate 103 and the guiding frame 101 respectively. A pressure sensor 106 and an air inlet pipe 107 are fixedly connected to the top end of the connecting shell 12. An electromagnetic valve 108 is fixedly connected to the outer side of the air inlet pipe 107. The size and shape of the conductive rubber 19 can be customized according to the capping beam formwork 21. When it is necessary to attach the conductive rubber 19 to the surface of the capping beam formwork 21, the third cylinder 11 is activated, and through the connecting shell 12, the fixing plate 103, the guiding shaft 104 and the guiding frame 101, the conductive rubber 19 is driven to make initial contact with the capping beam formwork 21. During this process, the spring 105 applies a downward force to the conductive rubber 19 through the guiding frame 101, making the two fit more closely. Subsequently, an external air source ventilates the inside of the connecting shell 12 through the air inlet pipe 107. Driven by the air pressure, the conductive rubber 19 further closely adheres to the surface of the capping beam formwork 21. At the same time, the pressure sensor 106 monitors the air pressure change inside the connecting shell 12 in real time, works together with the air inlet pipe 107 and the electromagnetic valve 108, and dynamically regulates the air pressure inside the connecting shell 12 to ensure that under the action of the air pressure, the conductive rubber 19 is always closely attached to the capping beam formwork 21, thereby effectively eliminating the contact gap, ensuring stable signal transmission during the measurement process, and greatly improving the accuracy of potential difference measurement.

[0033] As a further improvement of the present invention, as Figure 2 and Figure 5As shown in the figure, the tensioning mechanism 3 includes a connecting frame 301 fixedly connected to the connecting shell 12. One end of the connecting frame 301 is fixedly connected to a second cylinder 302. The second cylinder 302 is communicated with an external air source. One end of the second cylinder 302 is fixedly connected to a tensioning block 303. One side of the tensioning block 303 is provided with a tensioning shell 304 adapted to the tensioning block 303, and the tensioning shell 304 is fixedly connected to the connecting frame 301. The optical fiber 5 passes through between the tensioning shell 304 and the tensioning block 303. The connecting frame 301 and the tensioning shell 304 are hermetically designed with the connecting shell 12, effectively preventing the gas inside the connecting shell 12 from leaking through the connecting frame 301 and the tensioning shell 304. When the output head 6 moves above the capping beam formwork 21, the second cylinder 302 drives the tensioning block 303 to generate a relative displacement with the tensioning shell 304. The tensioning block 303 plays a key role in regulating the movement of the optical fiber 5: when the optical fiber 5 is pulled, the tensioning block 303 moves away from the tensioning shell 304, causing the optical fiber 5 inside the connecting frame 301 to gradually extend outwards; when the optical fiber 5 is in a relaxed state, the tensioning block 303 approaches the tensioning shell 304, gradually retracting the relaxed part of the optical fiber 5 back inside the connecting frame 301. Through such a mechanism, it is ensured that during the movement of the output head 6, the optical fiber 5 always maintains within a safe bending radian range, effectively avoiding excessive bending of the optical fiber 5 caused by the movement of the output head 6, reducing the risk of loss and damage caused by excessive bending, and greatly improving the service life and working stability of the optical fiber 5.

[0034] As a further improvement of the present invention, as Figure 5 shown, the tensioning block 303 is semicircularly arranged, and the radian of the tensioning block 303 is greater than the bending radian of the optical fiber 5, which can ensure that when the tensioning block 303 drives the optical fiber 5 to closely adhere to the tensioning shell 304, the optical fiber 5 always remains within an appropriate bending radian range, thus effectively avoiding performance degradation caused by excessive bending and ensuring the stable and efficient operation of the optical fiber 5.

[0035] As a further improvement of the present invention, as Figure 3 and Figure 5As shown in the figure, the adjusting mechanism 2 includes a first cylinder 201 fixedly connected to the connecting shell 12. The first cylinder 201 is communicated with an external air source. The other end of the first cylinder 201 is fixedly connected with a fixed frame 202. One end of the fixed frame 202 is fixedly connected with a motor 203. The end of the main shaft of the motor 203 is fixedly connected with a screw rod 204. The screw rod 204 is rotatably connected with the fixed frame 202. A slider 205 is spirally connected to the outside of the screw rod 204. The slider 205 is slidably connected with the fixed frame 202. The slider 205 is fixedly connected with the output head 6. The first cylinder 201 can drive the output head 6 to move in the X-axis direction through the fixed frame 202, the screw rod 204 and the slider 205. The motor 203 can drive the output head 6 to move in the Y-axis direction through the screw rod 204 and the slider 205. Through the mutual cooperation of the first cylinder 201 and the motor 203, the output head 6 can irradiate the entire surface of the bent cap formwork 21, so as to detect the flatness of the surface of the bent cap formwork 21 and the internal defects.

[0036] As a further improvement of the present invention, as Figure 5 shown in the figure, the end of the fixed frame 202 close to the motor 203 is fixedly connected with a first photoelectric distance sensor 206 and a second photoelectric distance sensor 207 respectively. The axis of the first photoelectric distance sensor 206 is parallel to the screw rod 204, and the axis of the second photoelectric distance sensor 207 is perpendicular to the screw rod 204. Before starting to measure the flatness of the surface of the bent cap formwork 21, first start the first cylinder 201, and move the first photoelectric distance sensor 206 and the second photoelectric distance sensor 207 to the corner position of the connecting shell 12 through the fixed frame 202. Regarding the cooperative working mechanism of the first photoelectric distance sensor 206 and the second photoelectric distance sensor 207 with the second cylinder 302, the second photoelectric distance sensor 207 is taken as an example for illustration here: when the second photoelectric distance sensor 207 is in place, the distance between the inner walls of the connecting shell 12 measured by it is denoted as X. When the output head 6 moves along the axis of the second photoelectric distance sensor 207 to the other side of the connecting shell 12, within half of the distance X that the output head 6 travels, the length of the optical fiber 5 between the output head 6 and the connecting frame 301 gradually shortens. At this time, the second photoelectric distance sensor 207 will send a signal to the control program in the computer 18, and the computer 18 will immediately control the second cylinder 302 to drive the tensioning block 303 to gradually approach the tensioning shell 304, and gradually recover the slack optical fiber 5 to the inside of the connecting frame 301. When the output head 6 moves forward beyond half of the distance X, it will gradually tighten the optical fiber 5. At this time, the second photoelectric distance sensor 207 sends a signal to the control program of the computer 18 again, and the computer 18 further controls the second cylinder 302 to drive the tensioning block 303 to gradually move away from the tensioning shell 304, so that the optical fiber 5 inside the connecting frame 301 gradually extends outwards. The working mode of the first photoelectric distance sensor 206 is the same as that of the second photoelectric distance sensor 207, and will not be repeated here.

[0037] As a further improvement of the present invention, as Figure 1 and Figure 3 shown, the periphery of the connecting shell 12 is convexly arranged, and a compensation groove 13 is provided inside the convexity. The compensation groove 13 can provide additional moving space for the fixed frame 202, the motor 203, the first photoelectric distance sensor 206 and the second photoelectric distance sensor 207, ensuring that the light output by the output head 6 can irradiate the edge of the capping beam formwork 21.

[0038] As a further improvement of the present invention, as Figure 1 shown, scale lines 14 are provided at the top of the base 9. With the help of the scale lines 14, the staff can accurately locate the specific positions of defects such as unevenness marked in the inspection report on the surface of the capping beam formwork 21 according to the position information.

[0039] As a further improvement of the present invention, as Figure 1 and Figure 3 shown, fixing blocks 15 are provided on both sides of the vertical center line of the capping beam formwork 21. One end of the fixing block 15 is fixedly connected to a fourth cylinder 16. The fourth cylinder 16 is communicated with an external air source. The other end of the fourth cylinder 16 is fixedly connected to a clamping plate 17, and the clamping plate 17 is clamped together with the capping beam formwork 21. After accurately placing the capping beam formwork 21 directly below the conductive rubber 19, start the fourth cylinder 16 to drive the clamping plate 17 to move and tightly clamp the capping beam formwork 21. In this way, the firm limit fixation of the capping beam formwork 21 is realized, effectively ensuring that the capping beam formwork 21 always maintains a stable state during the inspection process, providing a solid guarantee for the accuracy of the inspection results.

[0040] The above is a preferred embodiment of the present invention. The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present invention. Without departing from the protection scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The protection scope claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. Laser flatness detection device for production of bent cap formwork, comprising a base (9) and a support base (10), characterized in that: The top end of the base (9) is fixedly connected with a support base (10). The inner side of the support base (10) is fixedly connected with a third cylinder (11). The bottom end of the third cylinder (11) is fixedly connected with a connection shell (12). A fitting mechanism (1) is arranged at the bottom end of the connection shell (12). A conductive rubber (19) is fixedly connected inside the fitting mechanism (1). Below the conductive rubber (19) is a capping beam formwork (21) placed on the base (9). One end of the connection shell (12) is fixedly connected with an adjusting mechanism (2). One end of the adjusting mechanism (2) is fixedly connected with an output head (6). One end of the output head (6) is fixedly connected with an optical fiber (5). The other end of the optical fiber (5) is fixedly connected with a laser (4). One end of the laser (4) is fixedly connected with a tensioning mechanism (3), and the tensioning mechanism (3) is fixedly connected with the connection shell (12). One end of the conductive rubber (19) is fixedly connected with a wire (8). The other end of the wire (8) is connected with a signal amplifier (20) through an input end. The output end of the signal amplifier (20) is connected with a potential difference measuring instrument (7) through a transmission line. One end of the support base (10) is fixedly connected with a computer (18).

2. The laser flatness detection device for the production of capping beam formwork according to claim 1, wherein: The fitting mechanism (1) includes a fixing plate (103) fixedly connected with the connection shell (12). A guiding shaft (104) is slidably connected inside the fixing plate (103). The bottom end of the guiding shaft (104) is fixedly connected with a guiding frame (101). A sealing ring (102) is fixedly connected to the outer side of the guiding frame (101), and the guiding frame (101) is slidably connected with the connection shell (12) through the sealing ring (102). The conductive rubber (19) is fixedly connected with the guiding frame (101). A spring (105) is arranged outside the guiding shaft (104), and both ends of the spring (105) are fixedly connected with the fixing plate (103) and the guiding frame (101) respectively. A pressure sensor (106) and an air inlet pipe (107) are fixedly connected to the top end of the connection shell (12). An electromagnetic valve (108) is fixedly connected to the outer side of the air inlet pipe (107).

3. The laser flatness detection device for capping beam formwork production according to claim 1, wherein: The tensioning mechanism (3) includes a connection frame (301) fixedly connected with the connection shell (12). One end of the connection frame (301) is fixedly connected with a second cylinder (302). One end of the second cylinder (302) is fixedly connected with a tensioning block (303). One side of the tensioning block (303) is provided with a tensioning shell (304) adapted to the tensioning block (303), and the tensioning shell (304) is fixedly connected with the connection frame (301). The optical fiber (5) passes through between the tensioning shell (304) and the tensioning block (303).

4. The laser flatness detection device for the production of bent cap formwork according to claim 3, wherein: The tensioning block (303) is semicircularly arranged, and the radian of the tensioning block (303) is greater than the bending radian of the optical fiber (5).

5. The laser flatness detection device for the production of capping beam formwork according to claim 1, wherein: The adjusting mechanism (2) includes a first cylinder (201) fixedly connected to the connecting shell (12). The other end of the first cylinder (201) is fixedly connected to a fixed frame (202). One end of the fixed frame (202) is fixedly connected to a motor (203). The end of the main shaft of the motor (203) is fixedly connected to a screw rod (204), and the screw rod (204) is rotatably connected to the fixed frame (202). A slider (205) is helically connected to the outside of the screw rod (204), and the slider (205) is slidably connected to the fixed frame (202). The slider (205) is fixedly connected to the output head (6).

6. The laser flatness detection device for the production of bent cap formwork according to claim 5, wherein: A first photoelectric distance sensor (206) and a second photoelectric distance sensor (207) are respectively fixedly connected to the end of the fixed frame (202) close to the motor (203). The axis of the first photoelectric distance sensor (206) is parallel to the screw rod (204), and the axis of the second photoelectric distance sensor (207) is perpendicular to the screw rod (204).

7. The laser flatness detection device for the production of bent cap formwork according to claim 1, characterized in that: The periphery of the connecting shell (12) is convexly arranged, and a compensation groove (13) is formed inside the convex part.

8. The laser flatness detection device for capping beam formwork production according to claim 1, characterized in that: A scale line (14) is arranged at the top of the base (9).

9. The laser flatness detection device for the production of bent cap formwork according to claim 1, characterized in that: Fixed blocks (15) are arranged on both sides of the vertical center line of the capping beam formwork (21). One end of the fixed block (15) is fixedly connected to a fourth cylinder (16). The other end of the fourth cylinder (16) is fixedly connected to a clamping plate (17), and the clamping plate (17) clamps the capping beam formwork (21).

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