Defect detection device and defect detection method for traction steel belt

Abstract

The invention relates to a defect detection device for a traction steel belt, the defect detection device comprises a rack assembly, a guide wheel assembly, a visual detection module, a magnetic field excitation module and a magnetic field detection module, the rack assembly comprises an upper rack and a lower rack which are oppositely arranged, and an accommodating space is formed between the upper rack and the lower rack; the guide wheel assembly is arranged on at least one of the upper rack and the lower rack, and the guide wheel assembly is used for guiding the traction steel belt to move relative to the rack assembly; the visual detection module is arranged on the rack assembly and used for conducting visual recognition detection on the traction steel belt. The magnetic field excitation module is arranged between the upper rack and the lower rack and is used for forming a magnetic field in the accommodating space; the magnetic field detection module is arranged between the upper rack and the lower rack and used for detecting magnetic field signals. According to the defect detection device, a multi-mode defect detection method is fused, comprehensive detection of internal and external damage of the traction steel belt is achieved, and the detection precision and applicability are improved.

Description

Technical Field

[0001] This application relates to the technical field of elevator operation status detection and maintenance, and more specifically, to a defect detection device and method for traction steel belts. Background Art

[0002] As a new type of load-bearing and transmission component of elevators, the reliability and safety of traction steel belts are directly related to the normal operation of elevators and the safety of personnel. Therefore, the detection of damage to traction steel belts is an urgent need to ensure elevator safety and promote the development of the elevator industry.

[0003] Currently, the detection methods for traction steel belts are relatively single, mainly including manual visual inspection, magnetic flux leakage detection, and eddy current detection. Manual visual inspection relies on the experience of workers and can only identify obvious defects on the surface of the steel belt, with a low recognition rate and poor efficiency, and it is difficult to detect hidden damage. Magnetic flux leakage detection determines the damage situation by detecting the magnetic flux leakage signal of the steel belt after magnetization, but it often uses a unilateral permanent magnet magnetization method, with a fixed magnetic field strength and often difficult to effectively detect deep defects. Eddy current detection relies on high-frequency alternating magnetic fields to induce eddy currents to identify surface and near-surface damage defects, but limited by the skin effect, its ability to detect deep defects is weak, and the detection of steel belts with composite material structures is easily affected by material non-uniformity, with a high false detection rate. In addition, factors such as vibration and slip during the detection process may cause noise interference and affect the detection accuracy.

[0004] In summary, these methods each have limitations, are difficult to comprehensively and accurately evaluate the health status of the steel belt, and cannot meet the requirements of modern elevators for efficient and safe detection. Summary of the Invention

[0005] In view of the above technical problems, this application proposes a defect detection device and method for traction steel belts, aiming to comprehensively, accurately, and efficiently detect obvious and hidden damage to traction steel belts, improve the detection efficiency and accuracy, and thus boost the development of the modern elevator industry.

[0006] First, this application proposes a defect detection device for traction steel belts, which includes:

[0007] A frame assembly, including an upper frame and a lower frame arranged opposite to each other, with an accommodation space for accommodating the traction steel belt between the upper frame and the lower frame;

[0008] A guide wheel assembly, arranged on at least one of the upper frame and the lower frame, and the guide wheel assembly is used to guide the traction steel belt to move relative to the frame assembly;

[0009] A visual detection module, arranged on the frame assembly, and the visual detection module is used to perform visual recognition detection on the traction steel belt;

[0010] Two relatively arranged magnetic field excitation modules, the two magnetic field excitation modules are respectively arranged on the upper frame and the lower frame, and the magnetic field excitation module is used to form a magnetic field in the accommodation space;

[0011] Two relatively arranged magnetic field detection modules, the two magnetic field detection modules are respectively arranged on the upper frame and the lower frame, and the magnetic field detection module is used to detect magnetic field signals.

[0012] In some embodiments, the device further includes an encoder assembly arranged on the frame assembly, and the encoder assembly is arranged near the outlet end of the frame assembly.

[0013] In some embodiments, the encoder assembly includes:

[0014] A first bracket, arranged on the upper frame;

[0015] An encoder roller, rotatably connected to the first bracket, and the encoder roller is configured to rotate relative to the first bracket under the drive of the traction steel belt;

[0016] An incremental encoder, connected to the first bracket and located on one side of the encoder roller.

[0017] In some embodiments, the guide wheel assembly includes:

[0018] A first guide wheel group, including two first guide wheels arranged at intervals on the upper frame, and the two first guide wheels are respectively located at the inlet end and the outlet end of the frame assembly;

[0019] A second guide wheel group, arranged opposite to the first guide wheel group, and the second guide wheel group includes two second guide wheels arranged at intervals on the lower frame, and the two second guide wheels are respectively located at the inlet end and the outlet end of the frame assembly.

[0020] In some embodiments, the vision detection module includes an industrial camera and a second bracket, the second bracket is connected to the frame assembly, and the industrial camera is installed on the second bracket; and, the vision detection module is arranged near the inlet end of the frame assembly.

[0021] In some embodiments, two vision detection modules are provided, the two vision detection modules are arranged opposite to each other and are respectively arranged on the upper frame and the lower frame.

[0022] In some embodiments, the magnetic field excitation module includes a U-shaped high-frequency low-loss ferrite and winding coils arranged on both sides of the U-shaped high-frequency low-loss ferrite.

[0023] In some embodiments, the magnetic field detection module includes a third bracket and a Hall sensor array acquisition board. The third bracket is connected to the frame assembly, and the Hall sensor array acquisition board is detachably connected to the third bracket.

[0024] In a second aspect, the present application also proposes a method for detecting defects in a traction steel belt. This method is applied to the defect detection device of any of the above embodiments, and the method includes the following steps:

[0025] Perform magnetic flux leakage detection and eddy current detection on the traction steel belt through the visual detection module, the magnetic field excitation module, the magnetic field detection module, and the encoder assembly, and collect the magnetic flux leakage signal, eddy current signal, position information, and image information of the traction steel belt;

[0026] Use an MCU to preprocess and control the magnetic flux leakage signal, the eddy current signal, the position information, and the image information, and realize time-division multiplexing switching between the DC excitation mode for magnetic flux leakage detection and the AC high-frequency excitation mode for eddy current detection through a MOSFET switch circuit;

[0027] Upload the processed data to the host computer through wireless communication, and perform defect feature fusion analysis using deep learning algorithms, pattern recognition algorithms, or support vector machines;

[0028] Dynamically adjust the excitation current, excitation frequency, and data acquisition rate based on the detection status, and eliminate the residual magnetic field interference through a degaussing module with closed-loop feedback control.

[0029] In some embodiments, the realization of time-division multiplexing switching between the DC excitation mode for magnetic flux leakage detection and the AC high-frequency excitation mode for eddy current detection through the MOSFET switch circuit includes: realizing the excitation mode switching through the MOSFET switch circuit combined with a diode.

[0030] In some embodiments, the eddy current detection uses a DDS signal source to generate a high-frequency excitation signal, which is driven by a power amplifier to detect the coil, and the signal quality is optimized through an RC filter.

[0031] In some embodiments, the magnetic flux leakage detection is powered by an adjustable DC power supply, and the sensitivity is enhanced through a signal amplifier.

[0032] In some embodiments, the degaussing module performs PWM modulation on the H-bridge circuit through the MCU, combines with a DAC to generate a decaying oscillation signal, and forms a closed-loop control by real-time monitoring of the residual magnetic field by a Hall sensor.

[0033] In some embodiments, the preprocessing of the eddy current signal includes: band-pass filtering, phase-sensitive demodulation, RMS transformation, and ADC sampling.

[0034] In some embodiments, the preprocessing of the magnetic flux leakage signal includes: low-pass filtering and ADC sampling.

[0035] A defect detection device for a traction steel belt according to an embodiment of the present application includes a frame assembly, a guide wheel assembly, a visual detection module, two relatively arranged magnetic field excitation modules, and two relatively arranged magnetic field detection modules. Among them, the frame assembly includes an upper frame and a lower frame arranged relatively, and there is an accommodation space for accommodating the traction steel belt between the upper frame and the lower frame; the guide wheel assembly is arranged on at least one of the upper frame and the lower frame, and the guide wheel assembly is used to guide the traction steel belt to move relative to the frame assembly; the visual detection module is arranged on the frame assembly, and the visual detection module is used to perform visual recognition detection on the traction steel belt; the two magnetic field excitation modules are respectively arranged on the upper frame and the lower frame, and the magnetic field excitation module is used to form a magnetic field in the accommodation space; the two magnetic field detection modules are respectively arranged on the upper frame and the lower frame, and the magnetic field detection module is used to detect the magnetic field signal. Thus, the defect detection device for a traction steel belt according to the embodiment of the present application can make full use of the deep damage recognition ability of magnetic flux leakage detection, the surface damage detection advantage of eddy current detection, and the intuitive recognition ability of visual detection for external wear, cracking and other defects, realize the comprehensive detection of internal and external damage of the traction steel belt, improve the detection accuracy and applicability, and effectively make up for the deficiencies of a single detection method. Moreover, by arranging two relatively arranged magnetic field excitation modules and two magnetic field detection modules in the embodiment of the present application, the uniformity of the magnetic field distribution can be effectively enhanced, the comprehensiveness of defect detection can be improved, and the possibility of missed detection is greatly reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The drawings are used to provide a further understanding of the present application, and constitute a part of the specification, and are used to explain the present application together with the following specific embodiments, but do not constitute a limitation to the present application.

[0037] Figure 1 It is a schematic structural diagram of the defect detection device according to the embodiment of the present application;

[0038] Figure 2 It is an exploded schematic structural diagram of the defect detection device according to the embodiment of the present application;

[0039] Figure 3 It is a perspective view of the defect detection device according to the embodiment of the present application;

[0040] Figure 4 It is a schematic diagram of the defect detection device according to the embodiment of the present application configured with a magnetic field detection module of one specification;

[0041] Figure 5 It is a schematic diagram of the defect detection device according to the embodiment of the present application configured with a magnetic field detection module of another specification.

[0042] The drawings are not necessarily drawn to scale.

[0043] Reference numerals:

[0044] 1 - Frame assembly; 11 - Upper frame; 12 - Lower frame;

[0045] 2 - Guide wheel assembly; 21 - First guide wheel; 22 - Second guide wheel;

[0046] 3 - Visual inspection module; 31 - Industrial camera; 32 - Second bracket;

[0047] 4 - Magnetic field excitation module; 41 - U-shaped high-frequency low-loss ferrite; 42 - Winding coil;

[0048] 5 - Magnetic field detection module; 51 - Third bracket; 52 - Hall sensor array acquisition board; 53 - Screw; 54 - Screw;

[0049] 6 - Encoder assembly; 61 - First bracket; 62 - Encoder roller; 63 - Incremental encoder;

[0050] 7 - Traction steel belt; 8 - Buckle; 9 - Hinge; 10 - Roller bearing limit wheel. Detailed implementation manners

[0051] The following details the specific implementation manners of the present application with reference to the accompanying drawings. It should be understood that the specific implementation manners described herein are only for the purpose of illustration and explanation of the present disclosure, and are not intended to limit the present application.

[0052] In the present application, unless otherwise stated, the orientation terms such as "inner, outer" refer to the inside and outside of the self-profile of each component. Among them, the X direction can correspond to the left-right direction, the Y direction can correspond to the front-back direction, and the Z direction can correspond to the up-down direction, that is, the gravity direction of the refrigerator. The terms "first, second", etc. are used to distinguish one element from another, and do not have sequence and importance. In addition, when the following description refers to the accompanying drawings, the same reference numerals in different drawings represent the same or similar elements, and the present application will not repeat them.

[0053] As Figures 1 to 5As shown in the figure, the present application provides a defect detection device for a traction steel belt 7, which includes a frame assembly 1, a guide wheel assembly 2, a vision detection module 3, a magnetic field excitation module 4, and a magnetic field detection module 5. Among them, the frame assembly 1 includes an upper frame 11 and a lower frame 12 arranged opposite to each other, and there is an accommodation space for accommodating the traction steel belt 7 between the upper frame 11 and the lower frame 12; the guide wheel assembly 2 is arranged on at least one of the upper frame 11 and the lower frame 12, and the guide wheel assembly 2 is used to guide the traction steel belt 7 to move relative to the frame assembly 1; the vision detection module 3 is arranged on the frame assembly 1, and the vision detection module 3 is used to perform visual recognition detection on the traction steel belt 7; the magnetic field excitation module 4 is provided in two, the two magnetic field excitation modules 4 are arranged opposite to each other, and are respectively arranged on the upper frame 11 and the lower frame 12, and the magnetic field excitation module 4 is used to form a magnetic field in the accommodation space; the magnetic field detection module 5 is also provided in two, the two magnetic field detection modules 5 are respectively arranged on the upper frame 11 and the lower frame 12, and the magnetic field detection module 5 is used to detect magnetic field signals.

[0054] The frame assembly 1 is the load-bearing body of the defect detection device, which includes an upper frame 11 and a lower frame 12. The upper frame 11 and the lower frame 12 can be connected in a variety of ways, either detachable connection or non-detachable connection. Exemplarily, in the embodiments of the present application, the upper frame 11 and the lower frame 12 can be detachably connected, for example, they can be connected by a buckle 8 and a hinge 9, so that it is convenient to disassemble the entire frame assembly 1, facilitating the later maintenance and accessory replacement of the defect detection device.

[0055] The guide wheel assembly 2 is arranged on at least one of the upper frame 11 and the lower frame 12. That is to say, the guide wheel assembly 2 can be arranged on the upper frame 11, or on the lower frame 12, or the upper frame 11 and the lower frame 12 are both provided with the guide wheel assembly 2.

[0056] The guide wheel assembly 2 is used to guide the traction steel belt 7 so that the traction steel belt 7 moves relative to the frame assembly 1. In some embodiments, the guide wheel assembly 2 can be connected with a driving device, and the driving device drives the guide wheel assembly 2 to rotate through a transmission system, thereby guiding the movement of the traction steel belt 7. Exemplarily, the driving device can be a motor.

[0057] The guide wheel assembly 2 can be made of a variety of materials, such as non-magnetic materials or composite materials. Exemplarily, in the present application, the material of the guide wheel assembly 2 can be high-strength engineering plastics, such as polyoxymethylene (POM), nylon, etc., or non-magnetic metals, such as aluminum, stainless steel, etc.

[0058] In some embodiments, the guide wheel assembly 2 includes a first guide wheel group 21 and a second guide wheel group 22. The first guide wheel group 21 includes two first guide wheels 21 spaced apart on the upper frame 11, and the two first guide wheels 21 are respectively located at the inlet end and the outlet end of the frame assembly 1. The second guide wheel group 22 is disposed opposite to the first guide wheel group 21. The second guide wheel group 22 includes two second guide wheels 22 spaced apart on the lower frame 12, and the two second guide wheels 22 are respectively located at the inlet end and the outlet end of the frame assembly 1.

[0059] It can be understood that the inlet end of the frame assembly 1 refers to the end where the traction steel belt 7 enters the frame assembly 1, and the outlet end of the frame assembly 1 refers to the end where the traction steel belt 7 exits the frame assembly 1. Exemplarily, in Figure 1 and Figure 2 the inlet end should refer to the left end of the frame assembly 1, and the outlet end should refer to the right end of the frame assembly 1.

[0060] At the inlet end and the outlet end of the frame assembly 1, a first guide wheel 21 and a second guide wheel 22 are respectively arranged opposite to each other. The traction steel belt 7 is located between the first guide wheel 21 and the second guide wheel 22, which is beneficial to forming a stable traction for the traction steel belt 7, reducing the probability of the traction steel belt 7 deviating and vibrating, and improving the stability of the detection process.

[0061] In some embodiments, the defect detection device may further include a limiting mechanism. The limiting mechanism is disposed on the frame assembly 1 and can limit the traction steel belt 7 in its width direction to further prevent the traction steel belt 7 from vibrating and slipping, thereby improving the stability and detection accuracy during the detection process. For example, in the present application, the limiting mechanism may include at least four roller bearing limit wheels 10, and the roller bearing limit wheels 10 can limit and guide the traction steel belt 7 and minimize the friction force.

[0062] The visual detection module 3 is installed on the frame assembly 1. The visual detection module 3 can visually identify the obvious external damage of the traction steel belt 7. The visual detection module 3 may include a camera, an industrial camera, etc.

[0063] In some embodiments, the visual detection module 3 may include an industrial camera 31 and a second bracket 32. The second bracket 32 is connected to the frame assembly 1, and the industrial camera 31 is installed on the second bracket 32.

[0064] The second bracket 32 is connected to the frame assembly 1, and the connection method can be either a fixed connection or a detachable connection. The present application does not limit this. Similarly, the industrial camera 31 is installed on the second bracket 32, and its installation method can also be a fixed connection or a detachable connection.

[0065] Further, the visual detection module 3 can be disposed near the inlet end of the rack assembly 1. For example, during detection, it is convenient to first identify damages on the surface of the traction steel belt 7 through visual detection, such as cracks, peeling, wear, etc., which is conducive to screening out obvious defects and preventing the traction steel belt 7 with serious damages from entering the subsequent detection link, reducing the interference of subsequent complex signals, and improving the overall detection accuracy. In addition, the visual detection is faster, and it can quickly screen out the parts of the traction steel belt 7 that may have problems, enabling the subsequent detection link to focus on the defective areas, reducing the unnecessary data processing volume, and improving the overall detection efficiency.

[0066] In some embodiments, two visual detection modules 3 can be provided. The two visual detection modules 3 are disposed opposite to each other and are respectively disposed on the upper rack 11 and the lower rack 12. Providing two visual detection modules 3 facilitates visual recognition and detection of both sides of the traction steel belt 7, effectively expanding the detection range and improving the detection accuracy.

[0067] In some embodiments, the magnetic field excitation module 4 can include a U-shaped high-frequency low-loss ferrite 41 and winding coils 42 disposed on both sides of the U-shaped high-frequency low-loss ferrite 41. The winding coils 42 are passed through with direct current in the magnetic flux leakage detection mode, and a strong closed magnetic circuit is formed through the U-shaped high-frequency low-loss ferrite 41, effectively improving the magnetization efficiency of the steel belt and the magnetic flux leakage field intensity; in the eddy current detection mode, the winding coils 42 are loaded with high-frequency alternating current excitation signals, and the low-loss characteristics of the U-shaped high-frequency low-loss ferrite 41 are used to constrain the distribution of the alternating magnetic field, enhance the eddy current density and suppress the energy dissipation. The magnetic field excitation module 4 of the application embodiment can provide dual-mode magnetic field detection requirements, improving the diversity and flexibility of detection. Exemplarily, in the present application, the U-shaped high-frequency low-loss ferrite 41 can be PC95.

[0068] In some embodiments, the magnetic field detection module 5 includes a third bracket 51 and a Hall sensor array acquisition board 52. The third bracket 51 is connected to the rack assembly 1, and the Hall sensor array acquisition board 52 is detachably connected to the third bracket 51.

[0069] Between the third bracket 51 and the rack assembly 1, it can be fixedly connected or detachably connected, and the present application does not limit this.

[0070] The Hall sensor array acquisition board 52 can monitor and collect the magnetic field intensity and distribution data at multiple positions in real time, and achieve high-precision magnetic field measurement through multi-channel synchronous processing, so as to achieve circumferential positioning of the defects of the traction steel belt 7. The Hall sensor array acquisition board 52 is detachably connected to the third bracket 51, which can facilitate adapting to different widths of the traction steel belt 7, and thus adapting different specifications of the Hall sensor array acquisition boards 52 to enhance the monitoring and acquisition function of the magnetic field signal. Exemplarily, Figure 4and Figure 5 In it, they respectively represent the 60 mm specification and the 30 mm specification.

[0071] As a specific example, the third bracket 51 and the frame assembly 1 can be fixed by screws 53, and the Hall sensor array acquisition board 52 and the third bracket 51 can be fixed by screws 54.

[0072] In some embodiments, the defect detection device may further include an encoder assembly 6 disposed on the frame assembly 1, and the encoder assembly 6 is disposed near the outlet end of the frame assembly 1. The setting of the encoder assembly 6 facilitates the real-time detection of the movement position, speed, and direction of the traction steel belt 7, so as to axially position the defect position, achieving high-precision positioning and tracking of the defect position.

[0073] In some embodiments, the encoder assembly 6 includes a first bracket 61, an encoder roller 62, and an incremental encoder 63. The first bracket 61 is disposed on the upper frame 11; the encoder roller 62 is rotatably connected to the first bracket 61, and the encoder roller 62 is configured to rotate relative to the first bracket 61 under the drive of the traction steel belt 7; the incremental encoder 63 is connected to the first bracket 61 and is located on one side of the encoder roller 62.

[0074] The first bracket 61 and the upper frame 11 can be connected by threads, so as to facilitate the disassembly of the encoder assembly 6 from the frame assembly 1, thereby adjusting the position of the encoder assembly 6. The encoder roller 62 is rotatably connected to the first bracket 61, and the rotational connection can have various forms, such as shaft connection, etc. The incremental encoder 63 is used for precise positioning and monitoring of the defect position.

[0075] Therefore, the defect detection device for the traction steel belt in the embodiments of the present application can provide defect detection functions in multiple modes, and fuse multi-modal detection methods. It can not only make full use of the deep damage recognition ability of magnetic flux leakage detection, but also utilize the surface damage detection advantage of eddy current detection, as well as the intuitive recognition ability of visual detection for external wear, cracks and other defects, realizing comprehensive detection of internal and external damages of the traction steel belt, significantly improving the detection accuracy and applicability, and effectively making up for the deficiencies of single detection methods.

[0076] In a second aspect, the present application also proposes a defect detection method. The method is applied to the defect detection device in any of the above embodiments. The defect detection device includes an encoder assembly. The method includes the following steps:

[0077] Step 1: Perform visual detection, magnetic flux leakage detection, and eddy current detection on the traction steel belt through the visual detection module, the magnetic field excitation module, the magnetic field detection module, and the encoder assembly, and collect the image information, magnetic flux leakage signal, eddy current signal, and position information of the traction steel belt;

[0078] Step 2: Use a Microcontroller Unit (MCU) to preprocess and control the magnetic flux leakage signal, eddy current signal, position information, and image information, and implement time-division multiplexing switching between the DC excitation mode of magnetic flux leakage detection and the AC high-frequency excitation mode of eddy current detection through a MOSFET switch circuit;

[0079] Step 3: Upload the processed data to the host computer through wireless communication, and use deep learning algorithms, pattern recognition algorithms, or support vector machines for defect feature fusion analysis;

[0080] Step 4: Dynamically adjust the excitation current, excitation frequency, and data acquisition rate based on the detection status, and eliminate the residual magnetic field interference through a degaussing module with closed-loop feedback control.

[0081] It can be understood that the MCU, as the core controller, is responsible for sensor data acquisition, signal mode switching, degaussing control, and wireless communication management. After being processed by the MCU, various types of data can be transmitted to the host computer through a wireless local area network. The host computer combines methods such as deep learning algorithms, pattern recognition algorithms, or Support Vector Machine (SVM) to perform defect discrimination and display the detection results on a visualization interface. In addition, the MCU can also adaptively adjust the excitation current, excitation frequency, and data acquisition rate based on the detection status to optimize the detection effect and reduce power consumption.

[0082] In this method, eddy current detection is applicable to the detection of surface and near-surface conductive material defects, while magnetic flux leakage detection is applicable to the detection of deep ferromagnetic material defects. Combining the two detection methods can effectively improve the comprehensiveness and accuracy of the detection of internal and external defects of the traction steel belt.

[0083] In some embodiments, implementing time-division multiplexing switching between the DC excitation mode of magnetic flux leakage detection and the AC high-frequency excitation mode of eddy current detection through a MOSFET switch circuit may include: implementing excitation mode switching through the MOSFET switch circuit in combination with a diode, which can effectively avoid signal interference during mode switching.

[0084] In some embodiments, eddy current detection can use a Direct Digital Synthesis (DDS) signal source to generate a high-frequency excitation signal, drive the detection coil through a power amplifier, and optimize the signal quality through an RC filter.

[0085] In some embodiments, magnetic flux leakage detection can be powered by an adjustable DC power supply and the sensitivity can be enhanced through a signal amplifier.

[0086] In some embodiments, the demagnetization module can control the H-bridge circuit through the MCU to perform PWM (Pulse Width Modulation) modulation, combine with a Digital-to-Analog Converter (DAC) to generate a decaying oscillation signal, and use a Hall sensor to monitor the residual magnetic field in real time to form a closed-loop control.

[0087] In some embodiments, the preprocessing of the eddy current signal may include: band-pass filtering, phase-sensitive demodulation, RMS (Root Mean Square) transformation, and ADC (Analog-to-Digital Converter Sampling).

[0088] In some embodiments, the preprocessing of the magnetic leakage signal may include: low-pass filtering and ADC sampling.

[0089] In the foregoing detailed description, reference has been made to the accompanying drawings, in which specific aspects in which the present disclosure may be practiced are shown by way of illustration. Since the components of the described devices may be positioned in a number of different orientations, directional terms may be used for illustrative purposes and not be limiting. It should be understood that other aspects may be utilized and structural or logical changes may be made without departing from the concepts of the present disclosure. Accordingly, the following detailed description should not be taken in a limiting sense.

[0090] It should be understood that, unless otherwise specifically stated, the features of some embodiments of the various aspects of the present disclosure described herein may be combined with each other. As used herein, the term "and / or" includes any one of the related listed items and any combination of any two or more of them; similarly, "at least one of..." includes any one of the related listed items and any combination of any two or more of them.

[0091] It should be understood that, unless otherwise clearly defined and limited, the terms "engage", "attach", "mount", "connect", "couple", "fix", etc. used in the embodiments of the present disclosure should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or communicable with each other; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present disclosure may be understood according to specific circumstances.

[0092] In addition, the term "above" as used herein with respect to a component, element, or layer of material formed "above" or located "above" a surface can be used to mean that the component, element, or layer of material is "indirectly" positioned (e.g., placed, formed, deposited, etc.) on the surface such that one or more additional components, elements, or layers are disposed between the surface and the component, element, or layer of material. However, the term "above" as used herein with respect to a component, element, or layer of material formed "above" or located "above" a surface can also optionally have a specific meaning: the component, element, or layer of material is "directly" positioned (e.g., placed, formed, deposited, etc.) on the surface, e.g., in direct contact with the surface.

[0093] Although terms such as "first", "second", and "third" may be used herein to describe various components, elements, regions, layers, or sections, these components, elements, regions, layers, or sections are not limited to these terms. Rather, these terms are only used to distinguish one component, element, region, layer, or section from another. Thus, the first component, element, region, layer, or section referred to in the examples described herein could also be termed the second component, element, region, layer, or section without departing from the teachings of the examples. Additionally, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of the features. In the description herein, "a plurality" means at least two, such as two, three, etc., unless otherwise specifically and explicitly defined.

[0094] It should be understood that spatial relative terms, such as "above", "upper", "below", and "lower", are used herein to describe the relationship of one element shown in the figures to another element. In addition to the orientation depicted in the figures, such spatial relative terms are also intended to encompass different orientations of the device in use or operation. For example, if the device in the figures is flipped, an element described as "above" or "upper" relative to another element will then be "below" or "lower" relative to that other element. Thus, the term "above" encompasses both the above and below orientations depending on the spatial orientation of the device. The device may have other orientations (e.g., rotated 90 degrees or in other orientations), and the spatial relative terms used herein should be interpreted accordingly.

[0095] In addition, as used herein, the word "exemplary" is used to mean serving as an example, instance, or illustration. Any aspect or design described herein as "exemplary" is not necessarily to be construed as advantageous over other aspects or designs. Instead, the word exemplary is intended to present concepts in a concrete fashion. As used herein, the term "or" is intended to mean an inclusive "or" rather than an exclusive "or". That is, unless otherwise specified, or clear from the context, "X applies A or B" is intended to mean any of the natural inclusive permutations. That is, if X applies A; X applies B; or X applies both A and B, then "X applies A or B" is satisfied under any one of the foregoing instances. Additionally, unless otherwise specified or clear from the context that it is referring to the singular form, the articles "a" and "an" as used in this application and the appended claims are generally understood to mean "one or more".

[0096] Likewise, although the present disclosure has been shown and described with respect to one or more implementations, equivalent variations and modifications will occur to those skilled in the art upon reading and understanding the specification and drawings. The present disclosure includes all such modifications and variations and is limited only by the scope of the claims. Specifically with respect to the various functions performed by the components (e.g., elements, resources, etc.) described above, unless otherwise indicated, the terms used to describe such components are intended to correspond to any component (functionally equivalent) that performs the specific function of the described component, even if not structurally equivalent to the disclosed structure. Additionally, although a particular feature of the present disclosure may have been disclosed with respect to only one of several implementations, such a feature may, as may be desired and advantageous for any given or particular application, be combined with one or more other features of other implementations. Further, with respect to the use of "comprises", "comprising", "has", "having", "includes", or variants thereof in the detailed description or claims, such terms are intended to be inclusive in a manner similar to the term "including".

[0097] Other embodiments of the present disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include known or customary techniques in the art that are not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of the present disclosure are pointed out by the appended claims.

[0098] It should be understood that the present disclosure is not limited to the exact structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A defect detection device for traction steel belt, characterized in that: include: A frame assembly, comprising an upper frame and a lower frame arranged opposite to each other, wherein a receiving space for receiving a traction steel belt is provided between the upper frame and the lower frame; A guide wheel assembly, disposed on at least one of the upper frame and the lower frame, the guide wheel assembly being used to guide the traction steel belt to move relative to the frame assembly; A visual inspection module, disposed on the frame assembly, and used for visually identifying and inspecting the traction steel belt; Two magnetic field excitation modules are arranged opposite to each other, and the two magnetic field excitation modules are respectively arranged on the upper frame and the lower frame, and the magnetic field excitation modules are used to form a magnetic field in the accommodation space; Two magnetic field detection modules are arranged opposite to each other, and the two magnetic field detection modules are respectively arranged on the upper frame and the lower frame, and the magnetic field detection modules are used to detect magnetic field signals.

2. The defect detection device for traction steel belt according to claim 1, characterized in that: The device also includes an encoder component arranged on the frame component, and the encoder component is arranged close to the outlet end of the frame component.

3. The defect detection device for traction steel belt according to claim 2, characterized in that: The encoder assembly comprises: A first bracket, arranged on the upper frame; An encoder roller, rotatably connected to the first bracket, the encoder roller being configured to rotate relative to the first bracket under the drive of the traction steel belt; The incremental encoder is connected to the first bracket and is located on one side of the encoder roller.

4. The defect detection device for traction steel belt according to claim 1, characterized in that: The guide wheel assembly comprises: A first guide wheel assembly, comprising two first guide wheels spaced apart from each other on the upper frame, wherein the two first guide wheels are respectively located at an inlet end and an outlet end of the frame assembly; The second guide wheel group is arranged opposite to the first guide wheel group, and the second guide wheel group includes two second guide wheels arranged at intervals on the lower frame, and the two second guide wheels are respectively located at the inlet end and the outlet end of the frame assembly.

5. The defect detection device for traction steel belt according to claim 1, characterized in that: The visual inspection module includes an industrial camera and a second bracket, the second bracket is connected to the frame assembly, and the industrial camera is mounted on the second bracket; and The visual inspection module is disposed near the inlet end of the rack assembly.

6. The defect detection device for traction steel belt according to claim 5, characterized in that: The number of the visual inspection modules is two, and the two visual inspection modules are arranged opposite to each other and are respectively arranged on the upper frame and the lower frame.

7. The defect detection device for traction steel belt according to claim 1, characterized in that: The magnetic field excitation module comprises a u-shaped high-frequency low-loss ferrite and winding coils arranged on both sides of the u-shaped high-frequency low-loss ferrite.

8. The defect detection device for traction steel belt according to claim 1, characterized in that: The magnetic field detection module includes a third bracket and a Hall sensor array acquisition board. The third bracket is connected to the rack assembly, and the Hall sensor array acquisition board is detachably connected to the third bracket.

9. A defect detection method for a traction steel belt, applied to a defect detection device according to any one of claims 1 to 8, wherein the defect detection device comprises an encoder assembly, characterized in that: The method comprises: Perform visual inspection, magnetic flux leakage inspection and eddy current inspection on the traction steel belt through the visual inspection module, the magnetic field excitation module, the magnetic field detection module and the encoder component, and collect image information, magnetic flux leakage signal, eddy current signal and position information of the traction steel belt; The MCU is used to pre-process and control the magnetic flux leakage signal, the eddy current signal, the position information and the image information, and the MOSFET switching circuit is used to realize the time-sharing multiplexing switching between the DC excitation mode of magnetic flux leakage detection and the AC high-frequency excitation mode of eddy current detection; Upload the processed data to the host computer through wireless communication, and use deep learning algorithm, pattern recognition algorithm or support vector machine to perform defect feature fusion analysis; The excitation current, excitation frequency and data acquisition rate are dynamically adjusted based on the detection status, and the residual magnetic field interference is eliminated through the demagnetization module of closed-loop feedback control.

10. The defect detection method for traction steel belt according to claim 9, characterized in that: The method of realizing time-sharing multiplexing switching of the DC excitation mode for magnetic flux leakage detection and the AC high-frequency excitation mode for eddy current detection by using a MOSFET switching circuit includes: realizing excitation mode switching by combining a MOSFET switching circuit with a diode; or The eddy current detection uses a DDS signal source to generate a high-frequency excitation signal, drives the detection coil through a power amplifier, and optimizes the signal quality through an RC filter; or The magnetic flux leakage detection is powered by an adjustable DC power supply and the sensitivity is enhanced by a signal amplifier; or The degaussing module controls the H-bridge circuit to perform PWM modulation through the MCU, generates an attenuated oscillation signal in combination with the DAC, and monitors the residual magnetic field in real time through the Hall sensor to form a closed-loop control; or The preprocessing of the eddy current signal includes: bandpass filtering, phase-sensitive demodulation, RMS conversion and ADC sampling; or The preprocessing of the magnetic leakage signal includes: low-pass filtering and ADC sampling.

Images