A carbon fiber hard tube rubber layer detection system

Abstract

The present invention discloses a carbon fiber rigid tube glue layer detection system, the detection system comprises a transport module, a heating module, a detection module and a control module. The transport module transports the carbon fiber rigid tube to a designated workstation, and the heating module uses a built-in heating roller to uniformly heat the inner surface of the tube, and forms an appropriate temperature difference on the outer surface of the tube by adjusting the preset temperature. The detection module uses infrared thermal imaging technology to capture the surface temperature distribution after heating, and uses a rotating mechanism to perform all-round imaging of the circumferential surface of the tube. The detection process includes image processing operations such as image acquisition, denoising and temperature calibration. The temperature abnormality area is determined by partition analysis and feature extraction, thereby identifying defects such as uneven thickness and degumming of the glue layer. This detection system can be used to ensure the uniformity and thermal insulation performance of the glue layer of the carbon fiber rigid tube, and effectively improve the detection efficiency and accuracy.

Description

Technical Field

[0001] The invention belongs to the technical field of artificial material application, and in particular relates to a carbon fiber hard tube rubber layer detection system. Background Art

[0002] In the manufacturing process of carbon fiber composite materials, carbon fiber rigid tubes are widely used in aerospace, automobile manufacturing, high-precision equipment and other fields due to their excellent strength, heat resistance and light weight. However, carbon fiber tubes usually need to be coated with glue on their surface to improve interlayer adhesion and enhance the durability and fatigue resistance of their overall structure. Due to the complexity of the glue coating process and the influence of material properties, the glue layer is prone to defects such as uneven thickness, bubbles, and degumming, which not only affects the mechanical properties of the product, but also may lead to a decrease in thermal insulation performance. Traditional quality inspection methods mostly use manual visual inspection or destructive testing, which is inefficient and difficult to fully identify internal defects. Infrared thermal imaging detection technology, as a non-destructive testing method, reveals the structural integrity and bonding effect of the material by detecting the temperature distribution characteristics, providing an efficient and accurate solution for the detection of glue layer defects. Therefore, it is of great application value to develop an automatic detection system based on infrared thermal imaging to monitor the quality of the glue layer of carbon fiber rigid tubes online.

[0003] According to the relevant public technologies, the technical solution with announcement number CN114022433B proposes a robust visual detection method for carbon fiber composite material outlet delamination damage, such as visual imaging combined with machine learning algorithms to quickly perform non-destructive detection on carbon fiber composite materials, thereby improving the detection efficiency; the technical solution with publication number KR1020170087364A proposes a technical solution for detecting the carbon fiber parts on flying devices using ultrasonic detection, and non-destructive detection of various special-shaped carbon fiber components can be achieved through an ultrasonic detector; the technical solution with publication number WO2010020172A1 embeds optical fibers inside the carbon fiber components to detect internal damage of the carbon fiber components.

[0004] The above technical solutions all propose non-destructive testing solutions for carbon fiber components, but the above solutions are all based on the detection and evaluation of the appearance integrity of the components. For the detection of the thermal insulation performance of the finished carbon fiber insulation tube, a more optimized technical solution is still needed.

[0005] The foregoing discussion of the background art is intended only to facilitate an understanding of the present invention. This discussion does not acknowledge or admit that any of the material referred to is part of the common general knowledge. Summary of the invention

[0006] The object of the present invention is to provide a carbon fiber rigid tube rubber layer detection system, the detection system comprises a transport module, a heating module, a detection module and a control module. The transport module transports the carbon fiber rigid tube to the designated workstation, and the heating module uses a built-in heating roller to uniformly heat the inner surface of the tube, and forms an appropriate temperature difference on the outer surface of the tube by adjusting the preset temperature. The detection module uses infrared thermal imaging technology to capture the surface temperature distribution after heating, and uses a rotating mechanism to perform all-round imaging of the circumferential surface of the tube. The detection process includes image processing operations such as image acquisition, denoising and temperature calibration. The temperature abnormality area is determined by partition analysis and feature extraction, thereby identifying defects such as uneven thickness and degumming of the rubber layer. This detection system can be used to ensure the uniformity and thermal insulation performance of the rubber layer of the carbon fiber rigid tube, and effectively improve the detection efficiency and accuracy.

[0007] The present invention adopts the following technical scheme: a carbon fiber hard tube rubber layer detection system, the detection system includes a transport module, a heating module, a detection module and a control module; the transport module is used to form a detection line and transport the carbon fiber hard tube to a designated detection station; the heating module is used to continuously heat the carbon fiber hard tube from the inside; the detection module is used to collect thermal imaging images of the carbon fiber hard tube from the outside to detect the effect of heat conduction from the inside of the carbon fiber hard tube to the outside; the control module is used to control the transport module, the heating module and the detection module to work together;

[0008] Among them, the heating module includes a heating roller. After the heating roller is placed inside the carbon fiber rigid tube, the carbon fiber rigid tube is heated from the inner side through its own heat; by setting the preset heating temperature of the heating roller, the surface temperature of the carbon fiber rigid tube is increased by 20°C to 30°C compared with the ambient temperature, and the surface thermal imaging image of the carbon fiber rigid tube is collected under this temperature condition to analyze the influence of the glue layer treatment of the carbon fiber rigid tube on the thermal insulation performance of the carbon fiber rigid tube.

[0009] Preferably, the adhesive of the carbon fiber rigid tube is one or a mixture of more than one of phenolic water-based adhesive, epoxy water-based adhesive, and rubber water-based adhesive.

[0010] Preferably, the heating roller adopts an induction coil heating method and uses an integrated temperature sensor to control the heating temperature reached on the surface of the heating roller; the heating module includes a working circuit for providing power to the induction coil in the heating roller and a control circuit to control the heating roller to perform heating work.

[0011] Preferably, the surface of the heating roller includes a protective shell made of magnetic material.

[0012] Preferably, the heating roller is supported by two or more supporting bearings; the supporting bearings have a variable supporting height, and the supporting height of the supporting bearings is adjusted according to the control instructions of the control module.

[0013] Preferably, the transport module comprises a conveying mechanism and a pushing mechanism; the conveying mechanism is used for transporting the carbon fiber rigid tube to be tested in an assembly line manner; and the pushing mechanism is used for removing the carbon fiber rigid tube from the conveying mechanism.

[0014] Preferably, the detection module performs thermal imaging of the carbon fiber hard tube after internal heating based on the principle of infrared thermal imaging.

[0015] Preferably, the detection module further includes a rotating mechanism for driving the carbon fiber hard cylinder to rotate around the heating roller after the carbon fiber hard cylinder covers the heating roller.

[0016] Preferably, when testing the carbon fiber hard tube, the following testing steps are performed:

[0017] S100: The transport module transports the carbon fiber hard cylinder to the designated testing station;

[0018] S200: The pushing mechanism pushes the carbon fiber hard tube to cover the heating roller;

[0019] S300: Under the premise of maintaining the height of the heating roller, control the plurality of support bearings to start from a support bearing close to the carbon fiber hard cylinder, and as the carbon fiber hard cylinder moves and inserts into the position of the heating roller, the support heights of the support bearings are gradually lowered to avoid the carbon fiber hard cylinder;

[0020] S400: After the carbon fiber hard cylinder completely covers the heating roller, the heating roller is started to heat evenly and maintain the heating temperature of the heating roller;

[0021] S500: Use the detection module to perform thermal imaging detection on the carbon fiber hard tube and collect thermal imaging images;

[0022] S600: During the thermal imaging detection process, a rotating mechanism is used to drive the carbon fiber rigid tube to rotate around the heating roller to perform thermal imaging detection on multiple positions around the carbon fiber rigid tube.

[0023] The beneficial effects achieved by the present invention are:

[0024] The detection system of this technical solution is based on infrared thermal imaging technology. The system can identify defects in the rubber layer without performing destructive testing on the carbon fiber hard tube. Internal defects are discovered by detecting the temperature distribution on the surface of the tube, thus avoiding material damage that may be caused by traditional testing and ensuring the structural integrity of the product.

[0025] The detection system of this technical solution integrates transportation, heating, detection and control modules, which can realize the automated process of glue layer detection on the production line and improve the detection efficiency. At the same time, the use of precise temperature control and multi-sensor collaborative monitoring improves the accuracy and stability of detection, and can effectively detect problems such as bubbles and debonding in the glue layer.

[0026] The detection system of this technical solution can store the detection data and image information in real time, which is convenient for subsequent analysis and quality traceability; through the collection and partition analysis of temperature data, the system can quickly determine the defects of the adhesive layer and classify and mark them, forming systematic quality management data, providing a reliable basis for process improvement.

[0027] Each working module in the detection system of the present technical solution adopts a modular design, and the system maintenance and upgrade can be achieved by optimizing and replacing the working modules individually, thereby reducing the subsequent use cost and upgrade cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The present invention can be further understood from the following description in conjunction with the accompanying drawings. The components in the figures are not necessarily drawn to scale, but the emphasis is placed on illustrating the principles of the embodiments. In different views, the same reference numerals designate corresponding parts.

[0029] Description of the accompanying drawings: 10-transportation module; 16-pushing mechanism; 20-heating module; 22-heating roller; 24-support bearing; 241-support bearing A; 242-support bearing B; 30-detection module; 32-thermal imager; 321-detector; 34-moving device; 100-carbon fiber hard cylinder; 500-computer system; 502-bus; 504-processor; 506-main memory; 508-read-only memory; 510-storage device; 512-display; 514-input device; 516-cursor control device; 518-network device;

[0030] Figure 1 Schematic diagram of the framework of the detection system described in the embodiment of the present invention;

[0031] Figure 2 Schematic diagram of the structure of the detection system described in an embodiment of the present invention;

[0032] Figure 3 It is a schematic diagram of the detection system in the embodiment of the present invention when the hard cylinder is put into the heating roller;

[0033] Figure 4 is a schematic diagram of the support bearing described in an embodiment of the present invention;

[0034] Figure 5 Schematic diagram of the architecture of a computer system used by the control module in an embodiment of the present invention. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention is further described in detail below in conjunction with its embodiments; it should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. For those skilled in the art, after reviewing the following detailed description, other systems, methods and / or features of the present embodiment will become apparent. It is intended that all such additional systems, methods, features and advantages are included in this specification. Included within the scope of the present invention and protected by the appended claims. Additional features of the disclosed embodiments are described in the following detailed description, and these features will be apparent from the following detailed description.

[0036] The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right" and the like indicating the orientation or positional relationship, they are based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation. The invention is constructed and operated in a specific orientation, so the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on the present application. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to the specific circumstances.

[0037] Embodiment 1: As shown in the attached Figure 1 As shown, a carbon fiber hard tube rubber layer detection system is exemplarily proposed, and the detection system includes a transport module 10, a heating module 20, a detection module 30 and a control module 40; the transport module 10 is used to form a detection line and transport the carbon fiber hard tube to a designated detection station; the heating module 20 is used to continuously heat the carbon fiber hard tube from the inside; the detection module is used to collect thermal imaging images of the carbon fiber hard tube from the outside to detect the effect of heat conduction from the inside of the carbon fiber hard tube to the outside; the control module is used to control the transport module, the heating module and the detection module to work together;

[0038] Among them, the heating module includes a heating roller. After the heating roller is placed inside the carbon fiber rigid tube, the carbon fiber rigid tube is heated from the inner side through its own heat; by setting the preset heating temperature of the heating roller, the surface temperature of the carbon fiber rigid tube is increased by 20°C to 30°C compared with the ambient temperature, and the surface thermal imaging image of the carbon fiber rigid tube is collected under this temperature condition to analyze the influence of the glue layer treatment of the carbon fiber rigid tube on the thermal insulation performance of the carbon fiber rigid tube.

[0039] Preferably, the adhesive of the carbon fiber rigid tube is one or a mixture of more than one of phenolic water-based adhesive, epoxy water-based adhesive, and rubber water-based adhesive.

[0040] Preferably, the heating roller adopts an induction coil heating method and uses an integrated temperature sensor to control the heating temperature reached on the surface of the heating roller; the heating module includes a working circuit for providing power to the induction coil in the heating roller and a control circuit to control the heating roller to perform heating work.

[0041] Preferably, the surface of the heating roller includes a protective shell made of magnetic material.

[0042] Preferably, the heating roller is supported by two or more supporting bearings; the supporting bearings have a variable supporting height, and the supporting height of the supporting bearings is adjusted according to the control instructions of the control module.

[0043] Preferably, the transport module comprises a conveying mechanism and a pushing mechanism; the conveying mechanism is used for transporting the carbon fiber rigid tube to be tested in an assembly line manner; and the pushing mechanism is used for removing the carbon fiber rigid tube from the conveying mechanism.

[0044] Preferably, the detection module performs thermal imaging of the carbon fiber hard tube after internal heating based on the principle of infrared thermal imaging.

[0045] Preferably, the detection module further includes a rotating mechanism for driving the carbon fiber hard cylinder to rotate around the heating roller after the carbon fiber hard cylinder covers the heating roller.

[0046] Preferably, when testing the carbon fiber hard tube, the following testing steps are performed:

[0047] S100: The transport module transports the carbon fiber hard cylinder to the designated testing station;

[0048] S200: The pushing mechanism pushes the carbon fiber hard tube to cover the heating roller;

[0049] S300: Under the premise of maintaining the height of the heating roller, control the plurality of support bearings to start from a support bearing close to the carbon fiber hard cylinder, and as the carbon fiber hard cylinder moves and inserts into the position of the heating roller, the support heights of the support bearings are gradually lowered to avoid the carbon fiber hard cylinder;

[0050] S400: After the carbon fiber hard cylinder completely covers the heating roller, the heating roller is started to heat evenly and maintain the heating temperature of the heating roller;

[0051] S500: Use the detection module to perform thermal imaging detection on the carbon fiber hard tube and collect thermal imaging images;

[0052] S600: During the thermal imaging detection process, a rotating mechanism is used to drive the carbon fiber rigid tube to rotate around the heating roller to perform thermal imaging detection on multiple positions around the carbon fiber rigid tube.

[0053] As attached Figure 2 As shown, a side view schematic diagram of an embodiment of the detection system is exemplarily described; the detection system device can be directly configured on the production line for producing carbon fiber hard tubes, and set in the later stage of the gluing process on the production line to achieve quality control of the gluing process; and in some embodiments, the detection system can also be set up separately to perform finished product quality inspection on existing finished carbon fiber hard tubes.

[0054] As an exemplary embodiment, it includes a transport module 10 for continuously transporting carbon fiber hard tubes 100 , and a heating module 20 ; the heating module 20 includes a heating roller 22 , and a supporting bearing 24 for supporting the heating roller 22 .

[0055] The carbon fiber hard tube 100 is transported to the designated inspection station by the transport module 10, and is removed from the assembly line of the transport module 10 by the pushing mechanism 16. The center hole of the carbon fiber hard tube 100 is then inserted into the heating roller 22 for heating. After being heated to a preset temperature and kept warm, the detection module 30 performs infrared thermal imaging image acquisition for further analysis.

[0056] Specifically, in an exemplary embodiment, the transport module 10 may include a conveying mechanism such as a conveyor belt or a roller for conveying the hard tube from a previous workstation to the detection system; preferably, the transport module 10 may select a stable rubber belt or a metal roller to ensure smooth transportation according to the weight and shape of the tube; preferably, the transport module 10 may include a clamping and positioning device for stably conveying the hard tube; preferably, the transport module 10 is configured with a drive motor to provide power for the conveyor belt or the roller, and a servo motor or a variable frequency motor may be used to accurately control the conveying speed and positioning; at the same time, the transport module 10 may be provided with a plurality of sensors at key positions for detecting the position and posture of the hard tube, and the sensors may optionally include photoelectric sensors, laser sensors or proximity sensors, etc.; preferably, the transport module 10 integrates an automatic control system for managing the conveying speed, stop, start and accurate positioning of the hard tube at each workstation; the control system may be linked with the detection equipment to automatically start the next conveying cycle after the detection is completed; preferably, the transport module 10 includes a buffer and a protective device: a buffer device or a protective baffle may be provided on the conveying path to avoid collision or accidental damage in an emergency.

[0057] Furthermore, the transport module 10 conveys the carbon fiber rigid tube 100 to the heating module 20 for internal heating and raising the internal temperature to a preset temperature; the heating module 20 is provided with a heating roller 22, which penetrates from the center hole on one side of the carbon fiber rigid tube 100 and is maintained inside the carbon fiber rigid tube 100; the heating roller 22 transfers heat to the inner side of the carbon fiber rigid tube 100 by its own heat generation, so as to heat the carbon fiber rigid tube 100 to a specified temperature; thereafter, the carbon fiber rigid tube 100 is guided and positioned by a plurality of rollers along the conveying path, and finally reaches the detection position adapted by the detection module 30.

[0058] Preferably, the heating roller 22 has a diameter close to the inner hole of the carbon fiber rigid tube 100 so that the heat can be directly transferred to the inner side surface of the carbon fiber rigid tube 100 through interface contact.

[0059] Preferably, the heating roller 22 is supported by two or more support bearings 24; Figure 4 As shown, the connecting rod structure with adaptively adjustable support height can adjust the height of the support bearing 24 to adjust the vertical position of the heating roller 22 so as to accurately insert the carbon fiber hard tube 100 into the heating roller 22.

[0060] Preferably, the multiple sensors in the transport module 10 may include a sensor for detecting the inner aperture position of the carbon fiber rigid tube 100, such as a visual sensor or a distance sensor, to obtain the inner aperture position of the carbon fiber rigid tube 100, and adjust the height of the support bearing 24 accordingly by the program.

[0061] Preferably, when the carbon fiber rigid cylinder 100 needs to be moved out of the conveying mechanism of the transport module 10, the pushing mechanism 16 drives the carbon fiber rigid cylinder 100 to push the transport module 10 toward the location of the heating roller 22; the two or more support bearings 24 are lowered one by one in a predetermined order from the side close to the carbon fiber rigid cylinder 100 to the side far from the carbon fiber rigid cylinder 100;

[0062] As attached Figure 3 As shown, the A support bearing 241 descends first, and descends to a height sufficient to avoid the carbon fiber rigid tube 100; when the carbon fiber rigid tube 100 is driven, and the horizontal position passes over the A support bearing 241, the A support bearing 241 rises, and is supported on the outer surface of the carbon fiber rigid tube 100; thereafter, the B support bearing 242 and subsequent support bearings perform the above-mentioned descending-ascending operations one by one, and are finally all supported on the outer surface of the carbon fiber rigid tube 100.

[0063] Preferably, the supporting surface of the supporting bearing 24 is a smooth and cambered surface to reduce the friction between the contact surface of the carbon fiber rigid tube 100 when the carbon fiber rigid tube 100 is pushed.

[0064] Preferably, the supporting surface of the support bearing 24 may have a ball outer structure to change the sliding friction into rolling friction.

[0065] Further, to ensure that the heating roller 22 uniformly heats the inner side of the carbon fiber hard cylinder 100, in an exemplary embodiment, the heating roller 22 preferably includes a cylindrical core, an induction coil, an insulating belt, and a magnetic shell;

[0066] Preferably, the core shaft is the main body of the heating roller 22, has a cylindrical structure, and is usually made of high temperature resistant material, such as alloy steel or high strength steel, for supporting the installation of the induction coil and providing a stable structural foundation for the heating system.

[0067] Preferably, the induction coil is wound around the outer surface of the core shaft and is configured to convert electrical energy into thermal energy, providing a heat source for the heating roller 22 by induction heating; the body of the coil is made of a conductive metal material, such as copper or aluminum alloy, and has good conductivity and stability; the induction coil generates a uniform electromagnetic field after a continuous current is passed through it, thereby achieving a rapid and uniform heating effect.

[0068] Preferably, the thermal insulation belt is used to ensure that the heat of the heating roller 22 can be evenly distributed on the surface area, wherein the thermal insulation belt is divided into two parts: an inner thermal insulation belt and an outer thermal insulation belt: the inner thermal insulation belt is wound in a spiral manner along the circumference between the core axis and the induction coil, and its main function is to prevent excessive diffusion of heat to the core axis and ensure that the heat is mainly transferred to the outer surface; the outer thermal insulation belt is wound around the periphery of the induction coil, including outer thermal insulation belt A and outer thermal insulation belt B; outer thermal insulation belt A is wound around the induction coil before outer thermal insulation belt B, and the two are wound in opposite winding directions, and the inner and outer thermal insulation belts are both made of high-temperature resistant glass fiber, which can maintain good thermal conductivity at high temperatures and protect the insulation performance of the coil.

[0069] Preferably, a protective shell made of magnetic material is provided on the outside of the external insulation belt, and the magnetic material is preferably iron-based or other high magnetic permeability materials; the magnetic shell can concentrate the electromagnetic field, improve the induction efficiency, and provide external protection to prevent external physical damage to the induction coil and the insulation belt; in addition, the magnetic shell can also withstand extremely high temperatures to ensure that it remains stable when used in an environment above 200°C.

[0070] Based on the above settings, the structure of the heating roller 22 can not only prevent the rapid loss of heat and ensure uniform heating through the combined effect of the inner and outer insulating belts and the magnetic shell; it also provides electrical insulation protection and reduces the static electricity generated by the heating roller 22 and the carbon fiber hard tube 100 during the relative movement.

[0071] Furthermore, in a preferred embodiment, the detection module 30 includes a thermal imager 32 based on infrared thermal imaging technology and an analysis device communicatively connected to the thermal imager 32; the detection module 30 performs thermal imaging image sampling on the surface of the heated carbon fiber hard tube 100 based on infrared thermal imaging technology, and based on thermal imaging analysis, determines defects in the surface or the composite layer below the surface of the carbon fiber hard tube 100 caused by process errors in the adhesive layer.

[0072] Preferably, the thermal imager 32 includes a detector 321 for detecting infrared radiation; the detector 321 may include one or more probes to increase the coverage area of ​​the carbon fiber hard tube 100 for simultaneous detection; Figure 3 In the schematic diagram, preferably, the imaging surface of the detector 321 is perpendicular to the normal of the circumferential surface of the carbon fiber rigid tube 100 being detected, while in other embodiments, the angle between the imaging surface of the detector 321 and the normal of the circumferential surface of the carbon fiber rigid tube 100 being detected is at most 30° to ensure better thermal imaging effect.

[0073] Preferably, the detector 321 is fixed by a moving device 34 and driven so that the detector 321 can move back and forth along the axis direction of the carbon fiber rigid tube 100 to image the surface of the carbon fiber rigid tube 100 at multiple positions on the axis; in other embodiments, two or more detectors 321 can also be arranged in segments to reduce the moving stroke of each detector 321 itself and improve detection efficiency.

[0074] Embodiment 2: This embodiment should be understood to include at least all the features of any one of the aforementioned embodiments and to be further improved thereon.

[0075] Furthermore, after the heating roller 22 completes heating of the carbon fiber rigid tube 100 and raises the internal temperature of the tube to a preset temperature, infrared thermal imaging of the carbon fiber rigid tube 100 is randomly collected.

[0076] Preferably, during the collection process, a driving force in a circumferential direction is applied to the carbon fiber rigid tube 100 through a rolling mechanism arranged on the outer circle of the carbon fiber rigid tube 100, so that the carbon fiber rigid tube 100 rotates around the central axis, and at the same time the detector 321 can collect the entire circumferential surface of the carbon fiber rigid tube 100.

[0077] In other preferred embodiments, a rotating mechanism is provided at one end of the heating roller 22, and the heating roller 22 is driven to simultaneously rotate the carbon fiber hard cylinder 100 around the central axis, so as to achieve the purpose of inspecting the entire circumferential surface.

[0078] Furthermore, the image processing process may include the following analysis steps:

[0079] E100: Thermal imaging image acquisition. The detector 321 performs multiple thermal imaging acquisitions on the surface of the cylinder, scans the temperature distribution on the outer surface of the cylinder, generates an infrared thermal map, records the temperature data of each point, and saves the image data in digital form;

[0080] E200: Image preprocessing; this includes the following sub-steps:

[0081] De-noising: filtering thermal images to reduce interference from ambient light and equipment noise, and improve image clarity;

[0082] Temperature calibration: calibrate the temperature data in the infrared image with the preset reference temperature to ensure the accuracy of the temperature data.

[0083] E300: Image Partitioning and Feature Extraction, including:

[0084] Partition analysis: divide the thermal image into different areas, each area corresponds to a specific position of the cylinder; based on the set partitions, obtain the average temperature and temperature gradient of each area;

[0085] Abnormal point detection: extract abnormal temperature areas and analyze areas on the surface where the local temperature deviates significantly; high temperature may indicate that the adhesive layer is too thin or debonded, while low temperature may indicate defects such as uneven adhesive layer thickness or bubbles;

[0086] E400: Defect judgment based on feature extraction results: By comparing the temperature characteristics of each area, the type and severity of the abnormal area are judged; for each abnormal area, the temperature deviation value and temperature gradient are calculated, and based on the preset defect judgment threshold, it is determined whether there is a glue layer defect.

[0087] Furthermore, it may include adopting a classification marking method to classify and mark defects according to the inspection results, such as "uneven glue layer", "debonding" or "bubble", and mark the defect location and category on the thermal image.

[0088] E500: Data storage and result output, storing the processed images and defect information in the system database for subsequent traceability and quality analysis.

[0089] In step E300, the preset heating temperature of the heating roller needs to be calculated so that the carbon fiber hard tube is in a suitable detection temperature condition based on the specifications and material characteristics of the carbon fiber hard tube and the imaging principle of infrared thermal imaging; preferably, the preset heating target temperature T tar Calculated by the following formula:

[0090] ;

[0091] In the above formula, k is the thermal conductivity of the hard tube material, c is the specific heat capacity of the hard tube material, ρ is the density of the hard tube, d is the thickness of the hard tube, T env is the current detected ambient temperature, T surf is the desired temperature of the outer surface of the hard cylinder; t is the preset heating duration;

[0092] The specific values ​​of the parameters k, c, ρ, and d are determined according to the characteristics of the hard tube material; the value of the preset heating duration t can be reasonably set according to the detection time requirements, and the preferred heating time is set at 60s or more; the expected temperature T of the outer surface of the hard tube is surf Relevant testing personnel can make reasonable settings based on the heat resistance of carbon fiber, which can generally increase the relative ambient temperature by 20℃~30℃.

[0093] Embodiment 3: This embodiment should be understood to include at least all the features of any of the above embodiments, and further improve upon them;

[0094] For example, as shown in the attached Figure 5 As shown, the implementation of the computer system 500 used by the analysis device in the detection system is described; the computer system 500 can be applied to the data storage, calculation and result output process of each working module in the recognition and judgment system;

[0095] Illustratively, computer system 500 includes a bus 502 or other communication mechanism for communicating information, one or more processors 504 coupled to bus 502 for processing information; processor 504 may be, for example, one or more general-purpose microprocessors;

[0096] The computer system 500 also includes a main memory 506, such as a random access memory (RAM), a cache, and / or other dynamic storage device, coupled to the bus 502 for storing information and instructions to be executed by the processor 504; the main memory 506 may also be used to store temporary variables or other intermediate information during the execution of instructions to be executed by the processor 504; these instructions, when stored in a storage medium accessible to the processor 504, present the computer system 500 as a special-purpose machine customized to perform the operations specified in the instructions;

[0097] The computer system 500 may also include a read-only memory (ROM) 508 or other static storage device coupled to the bus 502 for storing static information and instructions for the processor 504; a storage device 510 such as a disk, an optical disk, or a USB drive (flash drive) will be coupled to the bus 502 for storing information and instructions;

[0098] And further, coupled to the bus 502 may also include a display 512 for displaying various information, data, media, etc., an input device 514 for allowing a user of the computer system 500 to control, manipulate, and / or interact with the computer system 500;

[0099] A preferred way to interact with the management system may be through a cursor control device 516, such as a computer mouse or similar control / navigation mechanism;

[0100] Furthermore, the computer system 500 may also include a network device 518 coupled to the bus 502; wherein the network device 518 may include, for example, a wired network card, a wireless network card, a switching chip, a router, a switch, and other components;

[0101] In general, the terms "engine", "component", "system", "database", etc., as used herein, may refer to logic embodied in hardware or firmware, or to a collection of software instructions, possibly with entry and exit points, written in a programming language such as Java, C, or C++; software components may be compiled and linked into executable programs, installed in a dynamic link library, or may be written in an interpreted programming language (e.g., BASIC, Perl, or Python); it should be understood that software components may be callable from other components or from themselves, and / or may be called in response to detected events or interrupts;

[0102] Software components configured to execute on a computing device may be provided on a computer-readable medium, such as a compact disc, digital video disc, flash drive, diskette, or any other tangible medium, or as a digital download (and may be initially stored) in a compressed or installable format that requires installation, decompression, or decryption prior to execution); such software code may be stored in part or in whole on a memory device of the executing computing device for execution by the computing device; software instructions may be embedded in firmware, such as an EPROM; it is also understood that hardware components may be composed of connected logic units (such as gates and flip-flops), and / or may be composed of programmable units (such as programmable gate arrays or processors);

[0103] Computer system 500 includes the techniques described herein that may be implemented using custom hardwired logic, one or more ASICs or FPGAs, firmware, and / or program logic that, in combination with the computer system, renders computer system 500 a special-purpose computing device;

[0104] According to one or more embodiments, the techniques herein may be performed by computer system 500 in response to processor 504 executing one or more sequences of one or more instructions contained in main memory 506; such instructions may be read into main memory 506 from another storage medium, such as storage device 510; execution of the sequences of instructions contained in main memory 506 causes processor 504 to perform the process steps described herein; in alternative embodiments, hard-wired circuitry may be used in place of or in combination with software instructions;

[0105] As used herein, the term "non-transitory media" and similar terms refer to any media that store data and / or instructions that cause a machine to operate in a specific manner; such non-transitory media may include non-volatile media and / or volatile media; non-volatile media include, for example, optical or magnetic disks, such as storage device 510; volatile media include dynamic memory, such as main memory 506;

[0106] Among them, common forms of non-transitory media include, for example, floppy disks, diskettes, hard disks, solid-state drives, magnetic tapes or any other magnetic data storage medium, CD-ROMs, any other optical data storage medium, any physical medium having a pattern of holes, RAM, PROM and EPROM, FLASH-EPROM, NVRAM, any other memory chip or cartridge, and network versions thereof;

[0107] Non-transient media are distinct from transmission media but may be used in conjunction with transmission media; transmission media participate in the transmission of information between non-transient media; for example, transmission media include coaxial cables, copper wires, and optical fibers, including the wires that make up bus 502; transmission media may also take the form of sound waves or light waves, such as radio waves and infrared data communications.

[0108] Although the present invention has been described above with reference to various embodiments, it should be understood that many changes and modifications may be made without departing from the scope of the present invention. That is, the methods, systems and devices discussed above are examples. Various configurations may appropriately omit, replace or add various processes or components. For example, in alternative configurations, the method may be performed in an order different from the order described, and / or various components may be added, omitted and / or combined. Moreover, the features described with respect to certain configurations may be combined in various other configurations, such as different aspects and elements of the configurations may be combined in a similar manner. In addition, the elements therein may be updated as the technology develops, i.e., many elements are examples and do not limit the scope of the present disclosure or claims.

[0109] Specific details are given in the specification to provide a thorough understanding of the exemplary configurations including implementations. However, the configurations may be practiced without these specific details. For example, well-known circuits, processes, algorithms, structures, and techniques have been shown without unnecessary details to avoid obscuring the configurations. This description provides only example configurations and does not limit the scope, applicability, or configurations of the claims. On the contrary, the foregoing description of the configurations will provide those skilled in the art with an enabling description for implementing the described techniques. Various changes may be made to the functions and arrangements of the elements without departing from the spirit or scope of the present disclosure.

[0110] In summary, it is intended that the above detailed description is considered to be illustrative rather than restrictive, and it should be understood that the above embodiments should be understood to be only used to illustrate the present invention and not to limit the scope of protection of the present invention. After reading the contents of the present invention, the technician can make various changes or modifications to the present invention, and these equivalent changes and modifications also fall within the scope defined by the claims of the present invention.

Claims

1. A carbon fiber hard tube rubber layer detection system, characterized in that: The detection system includes a transport module, a heating module, a detection module and a control module; the transport module is used to form a detection line and transport the carbon fiber hard tube to a designated detection station; the heating module is used to continuously heat the carbon fiber hard tube from the inside; the detection module is used to collect thermal imaging images of the carbon fiber hard tube from the outside to detect the effect of heat conduction from the inside of the carbon fiber hard tube to the outside; the control module is used to control the transport module, the heating module and the detection module to work together; The heating module includes a heating roller. After the heating roller is placed inside the carbon fiber rigid tube, the carbon fiber rigid tube is heated from the inner side by its own heat. By setting the preset heating temperature of the heating roller, the surface temperature of the carbon fiber rigid tube is increased by 20°C to 30°C compared with the ambient temperature. Under this temperature condition, a thermal imaging image of the surface of the carbon fiber rigid tube is collected to analyze the influence of the glue layer treatment of the carbon fiber rigid tube on the thermal insulation performance of the carbon fiber rigid tube. The heating roller is supported by two or more support bearings; the support bearings have variable support The support height of the support bearing is adjusted according to the control instruction of the control module; Under the premise of maintaining the height of the heating roller, the plurality of support bearings are controlled to start from a support bearing close to the carbon fiber hard cylinder, and as the carbon fiber hard cylinder moves and inserts into the position of the heating roller, the support heights of the support bearings are gradually lowered to avoid the carbon fiber hard cylinder; The detection module is based on the principle of infrared thermal imaging to thermally analyze the internally heated carbon fiber hard tube. picture; The detection module also includes a rotating mechanism for wrapping the heating roller around the carbon fiber hard cylinder. Then, driving the carbon fiber hard cylinder to rotate around the heating roller; The thermal imaging detection includes the following analysis steps: E100: Thermal imaging image acquisition. The detector collects thermal images of the cylinder surface multiple times, scans the temperature distribution of the cylinder outer surface, generates a thermal image, records the temperature data of each point, and saves the image data in digital form. E200: Image preprocessing; this includes the following sub-steps: De-noising: filtering thermal images to reduce interference from ambient light and equipment noise, and improve image clarity; Temperature calibration: calibrate the temperature data in the thermal image with the preset reference temperature to ensure the accuracy of the temperature data; E300: Image Partitioning and Feature Extraction, including: Partition analysis: divide the thermal image into different areas, each area corresponds to a specific position of the cylinder; based on the set partitions, obtain the average temperature and temperature gradient of each area; Abnormal point detection: extract abnormal temperature areas and analyze areas on the surface where the local temperature deviates significantly; high temperature indicates that the adhesive layer is too thin or debonded, while low temperature indicates uneven adhesive layer thickness or bubble defects; E400: Defect determination based on feature extraction results: By comparing the temperature characteristics of each area, the type and severity of the abnormal area are determined; for each abnormal area, the temperature deviation value and temperature gradient are calculated, and based on the preset defect determination threshold, whether there is a glue layer defect is determined; Adopt classification marking method, classify and mark defects according to the test results, and mark the defect location and category on the thermal image; E500: Data storage and result output, storing the processed images and defect information in the system database for subsequent traceability and quality analysis.

2. The detection system according to claim 1, characterized in that: The adhesive of the carbon fiber rigid tube is one or a mixture of more than one of phenolic water-based adhesive, epoxy water-based adhesive, and rubber water-based adhesive; The transport module includes a transport mechanism and a push mechanism; the transport mechanism is used for pipeline transport of The carbon fiber hard cylinder to be tested; the pushing mechanism is used to move the carbon fiber hard cylinder out of the conveying mechanism; The heating roller adopts the induction coil heating method and integrates the temperature sensor to control the heating The heating temperature reached by the surface of the heating roller; the heating module includes a working circuit and a control circuit for providing power to the induction coil in the heating roller to control the heating roller to perform heating work; the surface of the heating roller is provided with a protective shell made of magnetic material; When testing the carbon fiber hard tube, the following testing steps are performed: S100: The transport module transports the carbon fiber hard cylinder to the designated testing station; S200: The pushing mechanism pushes the carbon fiber hard tube to cover the heating roller; S300: Under the premise of maintaining the height of the heating roller, control the plurality of support bearings to execute, starting from a support bearing close to the carbon fiber hard cylinder, and as the carbon fiber hard cylinder moves and inserts into the position of the heating roller, the support heights of the support bearings are gradually lowered to avoid the carbon fiber hard cylinder; S400: After the carbon fiber hard cylinder completely covers the heating roller, the heating roller is started to heat evenly and maintain the heating temperature of the heating roller; S500: Use the detection module to perform thermal imaging detection on the carbon fiber hard tube and collect thermal imaging images; S600: During the thermal imaging detection process, a rotating mechanism is used to drive the carbon fiber rigid tube to rotate around the heating roller to perform thermal imaging detection on multiple positions around the carbon fiber rigid tube.

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