A non-destructive testing device for dynamic load bearing cables and a method of testing thereof

Abstract

The application discloses a kind of dynamic bearing cable nondestructive testing device and its detection method, for the flaw detection operation of cable in lifting process.The detection device includes horizontal positioning mechanism, rotary adjusting mechanism, adaptive posture adjusting mechanism, composite detection mechanism and multiple displacement sensing mechanism.Horizontal positioning mechanism realizes two-way position adjustment of horizontal plane, rotary adjusting mechanism can be rotatably arranged at the output end thereof, adaptive posture adjusting mechanism is arranged in a telescopic manner at the adjusting end of rotary adjusting mechanism, and has at least two independently driven adjusting ends.Composite detection mechanism is provided with a detection channel for the cable to pass through, and can simultaneously complete internal magnetic flux leakage flaw detection and external visual flaw detection of the cable.Displacement sensing mechanism is arranged at intervals along the extension direction of the cable, and real-time detects the distance from the surface of the cable and feeds back signals.Adaptive posture adjusting mechanism differentially controls the telescopic amount of adjusting end based on the signal, dynamically corrects the spatial posture of composite detection mechanism, and ensures that the detection channel is collinear with the axis of the cable.

Description

Technical Field

[0001] This invention relates to the field of testing technology, and in particular to a non-destructive testing device and method for dynamically loaded cables. Background Technology

[0002] Dynamic load-bearing cables are widely used in marine engineering, deep-earth mining, vertical transportation, and heavy lifting. Specific forms include deep-sea umbilical cables, mine hoisting wire ropes, elevator traction wire ropes, offshore platform mooring cables, and crane slings. These cables often integrate heavy-duty lifting, power transmission, and data communication functions. During long-term and complex service, these cables not only need to withstand enormous axial alternating tension but also frequently pass through cable laying mechanisms, traction drive wheels, guide pulleys, or cope with complex fluid and airflow environments, thus facing extreme dynamic mechanical conditions.

[0003] On the one hand, during hoisting, high-speed operation, and repeated contact and friction with mechanical components, the outer sheath or outer strands of the cable are prone to severe wear, diameter reduction, corrosion pitting, and even localized spalling. On the other hand, under the coupled effect of high stress and dynamic bending and torsion, the internal armor layer or steel core of the cable can develop imperceptible fretting fatigue, intergranular corrosion, and wire breakage defects. This combined damage pattern of internal and external problems seriously threatens the safety of the operating system.

[0004] However, existing non-destructive testing (NDT) technologies often have the following limitations: First, the testing methods are fragmented. Traditional testing methods typically treat surface damage and internal defects separately. External defects mostly rely on manual visual inspection, which is inefficient and cannot provide quantitative data during maintenance. Internal wire breaks rely on magnetic flux leakage or eddy current testing equipment, making it difficult to obtain health data for both internal and external dimensions simultaneously in a single operation. Second, they have poor dynamic adaptability. Existing testing equipment is mostly a rigid alignment structure, which is difficult to adapt to the lateral swaying, yaw tilting, and high-frequency vibrations generated by cables in actual operation. This mismatch in posture can not only cause drastic fluctuations in probe lift-off values, resulting in distorted or missed detections, but in severe cases, it can even lead to rigid collisions between the testing equipment and the cable, causing the equipment to jam or damaging the cable. Finally, there is a lack of full life-cycle assessment data. Due to the lack of synchronous, fixed-point, and continuous monitoring of external dimensional changes and internal metal damage, engineers find it difficult to establish accurate models of the cable's remaining strength. Summary of the Invention

[0005] In view of this, this application provides a non-destructive testing device and method for dynamic load-bearing cables. The testing device aims to solve the problems of fragmented detection of internal and external damage and poor dynamic adaptability of dynamic load-bearing cables. Through integrated synchronous detection and adaptive technology, it realizes the assessment of their health and predictive maintenance, thereby significantly improving operational safety and maintenance efficiency.

[0006] To achieve the above objectives, this application adopts the following technical solution:

[0007] A non-destructive testing device for a dynamically supported cable, used for flaw detection of the cable during the lifting process, comprising:

[0008] A horizontal positioning mechanism for bidirectional position adjustment within a horizontal plane;

[0009] A rotary adjustment mechanism is rotatably mounted at the output end of the horizontal positioning mechanism;

[0010] An adaptive attitude adjustment mechanism is telescopically mounted on the adjustment end of the rotary adjustment mechanism and has at least two independently driveable adjustment ends.

[0011] The composite inspection mechanism is located at the adjustment end of the adaptive attitude adjustment mechanism; it has an internal inspection channel for cables to pass through; it can simultaneously perform internal magnetic flux leakage inspection and external visual inspection on the passing cables.

[0012] Multiple displacement sensing mechanisms are spaced apart on the adaptive attitude adjustment mechanism along the extension direction of the cable to detect the distance between themselves and the cable surface in real time and feed back the distance signal.

[0013] Among them, the adaptive attitude adjustment mechanism can differentially control the extension and retraction of each adjustment end based on the distance signals fed back by each displacement sensing mechanism, so as to dynamically correct the spatial attitude of the composite detection mechanism and maintain the collinearity of the detection channel axis and the cable axis.

[0014] In some embodiments, the horizontal positioning mechanism includes an X-axis slide and a Y-axis slide;

[0015] The X-axis slide is arranged along the X-axis and has an X-axis guide rail. The Y-axis slide is driven by a first ball screw and nut pair and slides with the X-axis guide rail through a groove on the Y-axis slide to achieve translation adjustment along the X-axis. The Y-axis slide is arranged along the Y-axis and has a Y-axis guide rail. The rotary adjustment mechanism is driven by a second ball screw and nut pair and slides with the Y-axis guide rail through a groove at the bottom of the rotary adjustment mechanism to achieve translation adjustment along the Y-axis.

[0016] In some embodiments, the rotary adjustment mechanism includes a base, a rotary table rotatably disposed on the base, and a drive motor for driving the rotary table to rotate. The base is connected to a Y-axis slide.

[0017] In some embodiments, the adaptive attitude adjustment mechanism includes:

[0018] The base plate is connected to the rotary turntable and rotates synchronously with the turntable; at least two differential adjustment components are spaced apart on the base plate along the cable extension direction; each differential adjustment component has an independent telescopic end and can realize telescopic movement independently; the bottom of the floating platform is hinged to the telescopic end of each differential adjustment component through a hinge structure; the pitch attitude can be adjusted with the differential telescopic movement of the differential adjustment components.

[0019] The composite detection mechanism and the displacement sensing mechanism are both installed on the floating platform and their attitudes are adjusted synchronously with the movement of the floating platform.

[0020] In some embodiments, each differential adjustment component includes: two sets of sliding mating parts arranged opposite to each other on the base plate along the X-axis; a sliding frame including two sets of first sliding parts, a top plate and a connecting rod, the two sets of first sliding parts being disposed opposite to each other at the bottom of the sliding frame and symmetrically distributed along the X-axis, each set of first sliding parts being connected to the top plate through the connecting rod; each set of first sliding parts being slidably connected to the sliding mating parts on the same side to achieve vertical guidance; the top plate having second sliding parts on both sides in the Y-axis direction, the two ends of each set of second sliding parts being slidably mated to a set of sliding mating parts on the same side respectively;

[0021] The telescopic mechanism has a fixed end connected to the base plate and a telescopic end connected to the lower surface of the top plate of the sliding frame, which is used to drive the sliding frame to move up and down along the Z-axis.

[0022] The floating platform is hinged to the top plate of the sliding frame of each differential adjustment component via two hinged seats at its bottom, forming a pitch-adjustable hinged connection structure.

[0023] In some embodiments, each set of sliding mating parts includes two columns spaced apart along the Y-axis and a Z-axis slide rail mounted on each column;

[0024] Each first sliding part includes a first connecting plate and two sliding grooves installed on the first connecting plate. One sliding groove corresponds to the Z-axis sliding rail on the same side column and slides in a one-to-one manner. One end of the connecting rod is connected to the first connecting plate on the same side, and the other end is connected to the top plate of the sliding frame to form a stable support.

[0025] Each set of second sliding parts includes a second connecting plate and auxiliary sliding grooves opened at both ends of the second connecting plate in the X-axis direction. The auxiliary sliding grooves at both ends of the second connecting plate are respectively slidably engaged with the Z-axis sliding rail on the same side column.

[0026] In some embodiments, the composite testing mechanism includes:

[0027] The excitation flaw detection unit is mounted on the bearing surface of the floating platform via a bracket; it has a detection channel inside, which is used to establish an axial magnetic field for the cable and pick up leakage magnetic signals.

[0028] Two sets of guide units are respectively located at both ends of the axial direction of the excitation flaw detection unit; each set of guide units includes multiple telescopic brackets and multiple rolling wheels. The telescopic brackets are connected to the excitation flaw detection unit, and the multiple rolling wheels are evenly distributed circumferentially through the telescopic brackets; by adjusting the telescopic brackets, the wheel surfaces of the multiple rolling wheels are made to roll in close contact with the outer circumferential surface of the cable to achieve guidance and limiting.

[0029] The visual inspection unit is located at one axial end of the excitation flaw detection unit; it includes a support frame, multiple cameras, and a ring light; the support frame is connected to the excitation flaw detection unit, the multiple cameras are mounted at the end of the support frame and arranged circumferentially, with the camera ends all facing the outer circumferential surface of the cable, for acquiring images of the outer circumferential surface of the cable; the ring light is mounted at the end of the support frame to provide uniform illumination for the images acquired by the cameras.

[0030] In some embodiments, the excitation flaw detection unit has a symmetrically segmented structure; it includes:

[0031] Tubular armature;

[0032] The bushing includes a sleeve body and retaining rings at the openings at both ends; a cylindrical armature is disposed between the two retaining rings, and the sleeve body is disposed in the inner cavity of the cylindrical armature;

[0033] Two spaced-apart annular permanent magnets are both fitted onto the sleeve and connected to the sleeve to generate an axial magnetic field;

[0034] Two spaced magnetic rings are fitted onto and connected to the sleeve body, located between two annular permanent magnets, and respectively abutting and connected to the annular permanent magnets on the same side, for converging magnetic fields;

[0035] Two sets of probes are symmetrically arranged on the front and rear sides of the sleeve. Each set of probes is spaced apart along the X-axis and is installed on the outer peripheral wall of the magnetic ring on the same side, and connected to the annular permanent magnet on the same side to conduct the magnetic field to the cable. Each set of probes consists of two probes, which are symmetrically arranged on the front and rear sides of the sleeve.

[0036] The Hall element front panel is sleeved on and connected to the sleeve body, and is located between two magnetic rings. It is used to pick up the leakage magnetic signal of the cable and transmit it to the host computer.

[0037] The cylindrical armature, each annular permanent magnet, each probe shoe, and the Hall element front plate are all symmetrically split structures, and the two symmetrical parts of the cylindrical armature are locked together by multiple buckles.

[0038] In some embodiments, two displacement sensing mechanisms are provided, which are respectively arranged on the floating platform at the cable inlet and cable outlet of the composite detection mechanism.

[0039] When the cable swings during the lifting process, causing the actual distance between each displacement sensing mechanism and the cable to deviate from the preset distance, the telescopic mechanisms of the two differential adjustment components will perform telescopic movements independently to adjust the distance between the corresponding displacement sensing mechanism and the cable to the preset distance, thereby maintaining the cable and the detection channel on the same axis.

[0040] The displacement sensing mechanism is a displacement sensor; the telescopic mechanism is an electric cylinder or an electric push rod.

[0041] This application also provides a testing method for a non-destructive testing device for dynamically loaded cables, comprising the following steps:

[0042] Step S1, Device Reset and Coarse Positioning: Control the X-axis slide and Y-axis slide of the horizontal positioning mechanism to move, drive the composite detection mechanism to move synchronously, so that the geometric center of the composite detection mechanism is roughly aligned with the axis of the cable.

[0043] Step S2, Rotation Alignment and Attitude Adaptation: The drive motor of the rotation adjustment mechanism rotates, causing the turntable and the upper components to rotate around the Z-axis, so that the axis of the composite detection mechanism is consistent with the yaw direction of the cable; if the cable swings laterally, the drive motor drives the rotation adjustment mechanism to dynamically follow and adjust, so that the composite detection mechanism is always aligned with the swing direction of the cable; at the same time, the telescopic mechanism of the adaptive attitude adjustment mechanism extends, causing the floating platform and the composite detection mechanism to move closer to the cable;

[0044] Step S3, Differential Leveling: During the approach process in Step S2, the two displacement sensing mechanisms detect the actual distance between the cable inlet end and the cable outlet end and the cable, respectively, and feed the distance signal back to the host computer; if the actual distances at both ends are inconsistent, the host computer controls the telescopic mechanism of the two differential adjustment components to perform differential telescopic extension and retraction, adjust the pitch angle of the floating platform until the distance readings at both ends are consistent, and realize the parallel alignment of the composite detection mechanism and the cable;

[0045] Step S4, Flexible Clamping and Concentric Locking: While maintaining the parallel alignment, continue to control the extension mechanism to extend, driving the floating platform to rise until the rolling wheel of the guide unit is engaged with the cable surface. The mechanical limiting effect of the rolling wheel is used to forcibly correct minor deviations, so that the detection channel of the excitation flaw detection unit is concentric with the cable.

[0046] Step S5: Synchronous detection, start the excitation flaw detection unit and the vision inspection unit; as the cable rises and falls and generates relative motion with the device, the excitation flaw detection unit collects the leakage magnetic signals generated by defects such as broken wires inside the cable in real time, and the vision inspection unit synchronously collects the image information of the outer surface of the cable.

[0047] Step S6: Data acquisition and analysis. Based on the position information fed back by the displacement sensing mechanism, the host computer aligns the leakage magnetic signal and image information acquired in step S5, and combines the two data to accurately identify the internal broken wire location and external wear area of ​​the cable, and generates a detection report.

[0048] Compared with existing technologies, this invention achieves simultaneous, targeted, and integrated detection of surface damage and internal defects. Through multi-sensor fusion technology, it simultaneously acquires external wear and corrosion data with internal wire breakage and fatigue information in a single operation, solving the problems of fragmented and inefficient traditional detection methods. Secondly, the flexible adaptive probe structure and dynamic following system effectively adapt to the swaying, yaw, and vibration of the cable during actual operation, ensuring stable probe lift-off values ​​and avoiding signal distortion and equipment collision risks, greatly improving the reliability and safety of detection under dynamic conditions. Finally, through long-term continuous monitoring and data accumulation, an internal and external damage correlation model can be established, enabling accurate assessment of the cable's remaining strength and full life-cycle health management, providing a scientific basis for predictive maintenance and significantly improving overall operational safety and maintenance economy. Attached Figure Description

[0049] Figure 1 A schematic diagram of the structure of a non-destructive testing device for a dynamic load-bearing cable provided for an embodiment of this application;

[0050] Figure 2 Exploded views of the horizontal positioning mechanism and the rotary adjustment mechanism provided for embodiments of this application;

[0051] Figure 3 Exploded view of the adaptive attitude adjustment mechanism and displacement sensing mechanism provided in the embodiments of this application;

[0052] Figure 4 Exploded view of the composite detection mechanism provided for embodiments of this application;

[0053] Figure label:

[0054] 1. Horizontal positioning mechanism; 11. X-axis slide table; 111. X-axis guide rail; 12. Y-axis slide table; 121. Y-axis guide rail; 13. First ball screw nut pair; 14. Second ball screw nut pair;

[0055] 2. Rotation adjustment mechanism; 21. Base; 22. Rotary turntable; 23. Drive motor;

[0056] 3. Adaptive attitude adjustment mechanism; 31. Base plate; 32. Differential adjustment assembly; 321. Sliding mating part; 3211. Column; 3212. Z-axis slide rail; 322. Sliding frame; 3221. First sliding part; 3221a. First connecting plate; 3221b. Slide groove; 3222. Top plate; 3223. Connecting rod; 3224. Second sliding part; 3224a. Second connecting plate; 3224b. Auxiliary slide groove; 323. Telescopic mechanism; 33. Floating platform;

[0057] 4. Composite inspection mechanism; 41. Excitation flaw detection unit; 411. Inspection channel; 412. Cylindrical armature; 413. Bushing; 4131. Sleeve body; 4132. Retaining ring; 414. Ring permanent magnet; 415. Magnetizing ring; 416. Probe shoe; 417. Hall element front plate; 418. Tower buckle; 42. Guide unit; 421. Telescopic bracket; 422. Rolling wheel; 43. Visual inspection unit; 431. Bearing frame; 432. Camera; 433. Ring light;

[0058] 5. Displacement sensing mechanism;

[0059] 100. Cable. Detailed Implementation

[0060] In the embodiments of this application, the terms "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of terms such as "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0061] In the embodiments of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" and "second" may explicitly or implicitly include one or more of that feature.

[0062] In the description of the embodiments of this application, the term "at least one" means one or more, and "more than one" means two or more. "At least one of the following" or similar expressions refer to any combination of these items, including any combination of a single item or a plurality of items. For example, at least one of a, b, or c can mean: a, b, c, a and b, a and c, b and c, or a and b and c, where a, b, and c can be a single item or a plurality of items.

[0063] In the description of the embodiments of this application, the term "and / or" refers to and covers any and all possible combinations of one or more of the associated listed items. The term "and / or" describes an association relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this application generally indicates that the preceding and following related objects have an "or" relationship.

[0064] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, "linking" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. "Fixed connection" refers to a connection where the relative positional relationship remains unchanged after the connection. Furthermore, the directional terms mentioned in the embodiments of this application, such as "inner" and "outer," are only for reference to the directions in the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of this application, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0065] In the description of embodiments of this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0066] Please see Figure 1 , Figure 2 , Figure 3 as well as Figure 4 , Figure 1 This is a schematic diagram of the structure of a non-destructive testing device for a dynamic load-bearing cable, provided as an embodiment of this application. Figure 2 Exploded view of the horizontal positioning mechanism 1 and the rotary adjustment mechanism 2 provided for embodiments of this application. Figure 3 An exploded view of the adaptive attitude adjustment mechanism 3 and the displacement sensing mechanism 5 provided in the embodiments of this application. Figure 4An exploded view of the composite detection mechanism 4 provided in an embodiment of this application. The detection device is used to detect flaws in the cable 100 during the lifting process. The device includes: a horizontal positioning mechanism 1, a rotation adjustment mechanism 2, an adaptive attitude adjustment mechanism 3, a composite detection mechanism 4, and multiple displacement sensing mechanisms 5.

[0067] The horizontal positioning mechanism 1 is used for bidirectional position adjustment in the horizontal plane. A rotation adjustment mechanism 2 is rotatably mounted on the output end of the horizontal positioning mechanism 1. An adaptive attitude adjustment mechanism 3 is telescopically mounted on the adjustment end of the rotation adjustment mechanism 2 and has at least two independently driveable adjustment ends. A composite detection mechanism 4 is located on the adjustment end of the adaptive attitude adjustment mechanism 3. It has an internal detection channel 411 through which the cable 100 passes. It can simultaneously perform internal magnetic flux leakage flaw detection and external visual flaw detection on the passing cable 100. Multiple displacement sensing mechanisms 5 are spaced apart along the extension direction of the cable 100 on the adaptive attitude adjustment mechanism 3, used to detect the distance between themselves and the surface of the cable 100 in real time and feed back distance signals.

[0068] Furthermore, the adaptive attitude adjustment mechanism 3 can differentially control the extension and retraction of each adjustment end based on the distance signals fed back by each displacement sensing mechanism 5, so as to dynamically correct the spatial attitude of the composite detection mechanism 4 and maintain the axis of the detection channel 411 collinear with the axis of the cable 100.

[0069] In this way, the detection device adapts to the dynamic working conditions of cable 100's lifting and lowering, solving the problem of traditional detection devices struggling to handle the attitude deviation of cable 100 during movement. The displacement sensing mechanism 5 captures real-time distance changes relative to cable 100, providing data support for attitude correction and ensuring that the detection process is synchronized with the lifting and lowering of cable 100 without interruption, thus improving detection efficiency. The adaptive attitude adjustment mechanism 3 differentially controls the extension and retraction of each adjustment end based on feedback signals from the displacement sensing mechanism 5, dynamically correcting the spatial attitude of the composite detection mechanism 4, maintaining the collinearity of the detection channel 411 with the cable 100 axis, avoiding relative positional deviations caused by cable 100's swinging and offset, and preventing missed or false detections to improve flaw detection accuracy. The composite detection mechanism 4 integrates internal magnetic flux leakage detection and external visual flaw detection functions, simultaneously acquiring internal and external defects of cable 100 and achieving data linkage analysis, reducing detection steps and improving the comprehensiveness and accuracy of defect identification. Simultaneously, the horizontal positioning mechanism 1 and the rotation adjustment mechanism 2 work together to achieve bidirectional translation and rotation adjustment in the horizontal plane, facilitating quick alignment with the initial position of cable 100, improving the device's versatility and ease of installation and debugging.

[0070] Please see Figure 1 and Figure 2In some embodiments, the horizontal positioning mechanism 1 may include an X-axis slide 11 and a Y-axis slide 12. The X-axis slide 11 is arranged along the X-axis direction and is provided with an X-axis guide rail 111. The Y-axis slide 12 is driven by a first ball screw nut pair 13 and slides with the X-axis guide rail 111 through a groove provided on the Y-axis slide 12 to achieve translational adjustment along the X-axis direction.

[0071] The Y-axis slide 12 is arranged along the Y-axis direction and is provided with a Y-axis guide rail 121. The rotary adjustment mechanism 2 is driven by the second ball screw nut pair 14 and slides with the Y-axis guide rail through the slide groove provided at the bottom of the rotary adjustment mechanism 2 to realize translational adjustment along the Y-axis direction.

[0072] In this way, the combined structure of the X-axis slide 11 and Y-axis slide 12 of the horizontal positioning mechanism 1 can achieve bidirectional independent translational adjustment along the X and Y axes in the horizontal plane, compensating for minor horizontal offsets of the cable 100 to ensure initial positioning accuracy. The first ball screw nut pair 13 and the second ball screw nut pair 14 drive the Y-axis slide 12 and the rotary adjustment mechanism 2 respectively. Compared with ordinary sliding structures, this provides higher transmission accuracy and smoother operation, enabling fine adjustments and avoiding jamming or offset, thus ensuring the accuracy and stability of horizontal positioning. The Y-axis slide 12 slides with the X-axis guide rail 111 of the X-axis slide 11 via a sliding groove, and the rotary adjustment mechanism 2 slides with the Y-axis guide rail 121 of the Y-axis slide 12 via a bottom sliding groove. This provides high guiding accuracy and limits the movement trajectory, preventing lateral offset during adjustment and ensuring stable movement of the rotary adjustment mechanism 2 and subsequent components, maintaining the overall structural stability.

[0073] Please continue reading. Figure 1 and Figure 2 In some embodiments, the rotary adjustment mechanism 2 includes a base 21, a rotary turntable 22 rotatably disposed on the base 21, and a drive motor 23 for driving the rotary turntable 22 to rotate. The base 21 is connected to the Y-axis slide table 12.

[0074] In this way, the slewing adjustment mechanism 2 drives the rotary table 22 to rotate via the drive motor 23, which in turn drives the adaptive attitude adjustment mechanism 3 and the composite detection mechanism 4 above to achieve 360° rotation adjustment, quickly adapting to the yaw direction of the cable 100. This is especially suitable for the horizontal torsion and swinging conditions of the cable 100, ensuring that the detection channel 411 is always aligned with the extension direction of the cable 100. The base 21 is firmly connected to the Y-axis slide 12, providing stable support for the rotary table 22 and preventing structural swaying during rotation to ensure the accuracy of slewing adjustment. At the same time, the rotational cooperation structure between the rotary table 22 and the base 21 can reduce rotational resistance, improve the smoothness of adjustment and the attitude following response speed. Furthermore, the drive motor 23 can achieve precise control of the slewing angle, facilitating automatic adjustment with the host computer. It can adapt to the dynamic yaw correction of the cable 100 without manual intervention, improving the automated detection capability of the device.

[0075] Please see Figure 3 Combined Figure 1 In some embodiments, the adaptive attitude adjustment mechanism 3 includes: a base plate 31, at least two differential adjustment components 32, and a floating platform 33.

[0076] The base plate 31 is connected to the rotary table 22 and rotates synchronously with the rotary table 22.

[0077] Multiple differential adjustment components 32 are spaced apart on the base plate 31 along the extension direction of the cable 100. Each differential adjustment component 32 has an independent telescopic end and can perform telescopic action independently.

[0078] The bottom of the floating platform 33 is hinged to the telescopic end of each of the differential adjustment components 32 via a hinge structure, and the pitch attitude can be adjusted as the differential adjustment components 32 telescopically extend and retract.

[0079] The composite detection mechanism 4 and the displacement sensing mechanism 5 are both mounted on the floating platform 33 and adjust their attitude synchronously with the movement of the floating platform 33.

[0080] At least two differential adjustment components 32 of the adaptive attitude adjustment mechanism 3 are driven independently. In conjunction with the hinged structure of the floating platform 33, the pitch attitude of the floating platform 33 can be adjusted to specifically compensate for the swing offset of the cable 100 in the vertical plane, solving the problem that a single adjustment structure cannot correct pitch deviation. The hinged connection between the floating platform 33 and the differential adjustment components 32 ensures that the attitude adjustment is flexible and without jamming, while dispersing the adjustment stress to protect the composite detection mechanism 4 from impact. Furthermore, the composite detection mechanism 4 and the displacement sensing mechanism 5 are both installed on the floating platform 33, which can realize synchronous attitude adjustment. This ensures that the distance signal collected by the displacement sensing mechanism 5 truly reflects the relative position of the two, forming an adjustment closed loop to improve the attitude control accuracy. The differential adjustment components 32 are arranged at intervals along the extension direction of the cable 100, and can adjust the deviation at both ends of the cable 100 entering and exiting the detection channel 411 separately to achieve fine correction and ensure that the axis is collinear.

[0081] Please see Figure 3 Combined Figure 1 In some embodiments, each of the differential adjustment components 32 includes: two sets of sliding mating parts 321, a sliding frame 322, and a telescopic mechanism 323.

[0082] Two sets of sliding fit parts 321 are arranged opposite to each other on the base plate 31 along the X-axis direction.

[0083] The sliding frame 322 includes two sets of first sliding parts 3221, a top plate 3222, and a connecting rod 3223. The two sets of first sliding parts 3221 are symmetrically distributed at the bottom of the sliding frame 322 along the X-axis. Each set of first sliding parts 3221 is connected to the top plate 3222 via the connecting rod 3223. Each set of first sliding parts 3221 is slidably connected to a sliding engagement part 321 on the same side to achieve vertical guidance. The top plate 3222 has second sliding parts 3224 on both sides in the Y-axis direction. The two ends of each set of second sliding parts 3224 are slidably engaged with a set of sliding engagement parts 321 on the same side.

[0084] The fixed end of the telescopic mechanism 323 is connected to the base plate 31, and the telescopic end is connected to the lower surface of the top plate 3222 of the sliding frame 322, which is used to drive the sliding frame 322 to move up and down along the Z-axis.

[0085] The floating platform 33 is hinged to the top plate 3222 of the sliding frame 322 of each differential adjustment component 32 via two hinge seats at its bottom, forming a pitchable hinge connection structure.

[0086] In this way, the sliding engagement part 321 of the differential adjustment component 32 adopts a double column and Z-axis slide rail structure, which, together with the first sliding part 3221 and the second sliding part 3224 of the sliding frame 322, forms a multi-directional guiding constraint to ensure that the sliding frame 322 moves vertically up and down along the Z-axis without deviation or tilt, thus ensuring the straightness of the telescopic adjustment. The first sliding part 3221 is symmetrically distributed along the X-axis, and the second sliding part 3224 is located on both sides of the Y-axis, which can restrict the horizontal displacement of the sliding frame 322 from both X and Y directions, retaining only the Z-axis lifting degree of freedom, and avoiding horizontal deviation during telescopic adjustment from affecting the attitude adjustment accuracy. The telescopic mechanism 323 directly drives the top plate 3222 of the sliding frame 322. The short transmission path reduces power loss and transmission error, and enables control of the telescopic amount. The connecting rod 3223 connects the first sliding part 3221 and the top plate 3222 to form a stable frame, which improves the load-bearing capacity of the sliding frame 322 to ensure the stable installation of the floating platform 33 and the detection mechanism. The floating platform 33 is hinged to the top plate 3222 through the hinge seat. The reasonable layout of the hinge points makes the pitch adjustment force uniform, avoids local stress concentration that may cause structural damage, and extends the service life of the device.

[0087] Please see Figure 3 Combined Figure 1 In some embodiments, each set of sliding mating parts 321 includes two columns 3211 spaced apart along the Y-axis and a Z-axis slide rail 3212 mounted on each column 3211.

[0088] Each set of first sliding parts 3221 includes a first connecting plate 3221a and two sliding grooves 3221b mounted on the first connecting plate 3221a. Each sliding groove 3221b corresponds to a Z-axis sliding rail 3212 on the same side column 3211 for sliding engagement. One end of the connecting rod 3223 is connected to the first connecting plate 3221a on the same side, and the other end is connected to the top plate 3222 of the sliding frame 322 to form a stable support.

[0089] Each set of second sliding parts 3224 includes a second connecting plate 3224a and auxiliary sliding grooves 3224b opened at both ends of the second connecting plate 3224a in the X-axis direction. The auxiliary sliding grooves 3224b at both ends of the second connecting plate 3224a slide in cooperation with the Z-direction sliding rail 3212 on the same side column 3211.

[0090] In this way, the columns 3211 of each set of sliding mating parts 321 are arranged at intervals along the Y-axis, providing stable support for the Z-axis slide rail 3212, ensuring the verticality and parallelism of the slide rail, and providing guidance for the first sliding part 3221 and the second sliding part 3224 to further improve the straightness of the sliding frame 322's lifting and lowering. The two sliding grooves 3221b of the first sliding part 3221 correspond one-to-one with the Z-axis slide rail 3212 of the column 3211 on the same side, forming a double slide rail guide structure. Compared with a single slide rail, the guide stability is stronger, which can effectively prevent the sliding frame 322 from twisting during the lifting and lowering process and ensure adjustment accuracy. The auxiliary slide groove 3224b of the second sliding part 3224 slides in cooperation with the slide rail of the column 3211, further constraining the movement of the sliding frame 322 from both sides of the Y-axis. It forms a cooperative guide with the first sliding part 3221, restricting horizontal displacement and torsion in all directions, ensuring that the sliding frame 322 only rises and falls along the Z-axis to improve the reliability of telescopic adjustment. The connecting rod 3223 connects the first connecting plate 3221a and the top plate 3222 to form a stable support structure, enhancing the structural rigidity of the sliding frame 322. It can cope with the weight load and posture adjustment force of the detection mechanism, and avoid deformation of the sliding frame 322 to ensure long-term stability.

[0091] Please see Figure 4 Combined Figure 1 In some embodiments, the composite inspection mechanism 4 includes: an excitation flaw detection unit 41, two sets of guide units 42, and a vision inspection unit 43.

[0092] The excitation flaw detection unit 41 is mounted on the bearing surface of the floating platform 33 via a bracket. It has the detection channel 411 inside, which is used to establish an axial magnetic field on the cable 100 and pick up leakage magnetic signals.

[0093] Two sets of guide units 42 are respectively located at both ends of the axial direction of the excitation flaw detection unit 41. Each set of guide units 42 includes multiple telescopic brackets 421 and multiple rolling wheels 422. The telescopic brackets 421 are connected to the excitation flaw detection unit 41, and the multiple rolling wheels 422 are evenly distributed circumferentially through the telescopic brackets 421. By adjusting the telescopic amount of the telescopic brackets 421, the wheel surfaces of the multiple rolling wheels 422 are made to roll in close contact with the outer circumferential surface of the cable 100, thereby achieving guidance and limiting. For example, the wheel surface of each rolling wheel 422 can be concave to ensure full contact between the rolling wheel 422 and the cable 100.

[0094] A visual inspection unit 43 is disposed at one axial end of the excitation flaw detection unit 41. It includes a support frame 431, multiple cameras 432, and a ring light 433. The support frame 431 is connected to the excitation flaw detection unit 41. The multiple cameras 432 are mounted at the end of the support frame 431 and arranged circumferentially, with their camera ends all facing the outer circumferential surface of the cable 100, for acquiring images of the outer circumferential surface of the cable 100. The ring light 433 is mounted at the end of the support frame 431 to provide uniform illumination for the images acquired by the cameras 432.

[0095] In this way, the guide unit 42 adjusts the position of the rolling wheel 422 through the telescopic bracket 421, so that the rolling wheel 422 makes close rolling contact with the outer circumference of the cable 100. This achieves flexible guidance and limiting to avoid damage to the surface of the cable 100 from rigid contact, and can also forcibly correct minor posture deviations, helping to maintain the concentricity of the detection channel 411 and the cable 100 to improve detection stability. Multiple rolling wheels 422 are evenly distributed circumferentially, applying constraints from multiple points on the outer circumference of the cable 100 to ensure symmetrical guidance and limiting, avoiding unilateral force that could cause the cable 100 to deviate, and the rolling contact does not affect the lifting and lowering movement of the cable 100 without interference. Multiple cameras 432 of the visual inspection unit 43 are arranged circumferentially, and together with the ring light 433, they provide uniform illumination. They can collect images of the outer circumference of the cable 100 from all directions without visual blind spots, thereby improving image clarity and accurately identifying external defects. The magnetic flaw detection unit 41 and the visual inspection unit 43 are integrated into the same compact structure, eliminating the need for two separate devices to reduce space occupation. They can simultaneously carry out internal and external inspections and realize data linkage analysis, thereby improving the efficiency and accuracy of defect identification.

[0096] Please continue reading. Figure 4 Combined Figure 1 In some embodiments, the excitation flaw detection unit 41 includes a cylindrical armature 412, a bushing 413, two spaced annular permanent magnets 414, two spaced magnetic rings 415, two sets of probe shoes 416, and a Hall element front plate 417.

[0097] The bushing 413 may include a sleeve body 4131 and retaining rings 4132 disposed at the openings at both ends. The cylindrical armature 412 is disposed between the two retaining rings 4132, and the sleeve body 4131 is disposed in the inner cavity of the cylindrical armature 412.

[0098] Two spaced-apart annular permanent magnets 414 are both sleeved on and connected to the sleeve 4131 to generate an axial magnetic field.

[0099] Two spaced magnetic rings 415 are both sleeved on and connected to the sleeve 4131, located between the two annular permanent magnets 414, and respectively abutting and connected to the annular permanent magnets 414 on the same side, for converging magnetic fields.

[0100] Two sets of probes 416 are symmetrically arranged on the front and rear sides of the sleeve 4131. Each set of probes 416 is spaced apart along the X-axis and is respectively installed on the outer peripheral wall of the magnetic ring 415 on the same side, and connected to the annular permanent magnet 414 on the same side for conducting the magnetic field to the cable 100. Each set of probes 416 consists of two probes, which are symmetrically arranged on the front and rear sides of the sleeve 4131.

[0101] The Hall element front plate 417 is sleeved on the sleeve 4131 and connected to the sleeve 4131, and is located between the two magnetic rings 415, for picking up the leakage magnetic signal of the cable 100 and transmitting it to the host computer.

[0102] Among them, the cylindrical armature 412, each annular permanent magnet 414, each probe shoe 416, each magnetic ring 415, and the Hall element front plate 417 are all symmetrically split structures, and the two symmetrical parts of the cylindrical armature 412 are locked by multiple buckles 418 respectively.

[0103] In this way, the cylindrical armature 412, the annular permanent magnet 414, each probe shoe 416, and the Hall element front plate 417 all adopt a symmetrical split structure and are secured with multiple buckles 418, allowing the excitation flaw detection unit 41 to open and close quickly and directly cover the cable. This achieves convenient installation and disassembly without needing to insert it from the cable end, improving on-site inspection efficiency. In terms of magnetic circuit design, two spaced annular permanent magnets 414, together with a magnetic focusing ring 415, effectively converge the magnetic field. The axial magnetic field is uniformly and fully conducted to the circumference of the cable 100 through two sets of probe shoes 416 symmetrically arranged on the front and rear sides of the sleeve 4131, ensuring that the cable 100 is stably and uniformly magnetized. The retaining ring 4132 of the bushing 413 and the sleeve 4131 provide stable axial and radial positioning, ensuring the concentricity and relative position of each magnetic circuit component and sensing component, resulting in a compact and reliable overall structure. Meanwhile, the Hall element front plate 417, located between the two magnetic rings 415, can pick up the leakage magnetic signal caused by the cable 100 defect at the optimal position. Its symmetrical installation method ensures the consistency and high sensitivity of signal pickup, thereby achieving high-precision identification of defects. In addition, the split design also facilitates independent maintenance and replacement of key components, reducing long-term maintenance costs. Overall, this design integrates ease of operation, uniform magnetization, structural stability, and signal reliability.

[0104] Please see Figure 3 Combined Figure 1 In some embodiments, the displacement sensing mechanism 5 is configured as two, respectively arranged on the floating platform 33 corresponding to the cable inlet and cable outlet of the composite detection mechanism 4.

[0105] When the cable 100 swings during the lifting process, causing the actual distance between each displacement sensing mechanism 5 and the cable 100 to deviate from the preset distance, the telescopic mechanism 323 of the two differential adjustment components 32 performs telescopic movement independently, adjusting the distance between the corresponding displacement sensing mechanism 5 and the cable 100 to the preset distance, thereby maintaining the cable 100 and the detection channel 411 coaxial.

[0106] For example, the displacement sensing mechanism 5 is a displacement sensor. The telescopic mechanism 323 is an electric cylinder or an electric push rod.

[0107] In this way, the two displacement sensing mechanisms 5 are respectively arranged at the cable inlet and cable outlet ends of the composite detection mechanism 4, which can simultaneously detect the distance between the two ends of the cable 100 and the detection mechanism, capture the pitch offset trend of the cable 100, and provide bidirectional data support for differential adjustment, avoiding the problem that a single sensor cannot determine the offset direction. The telescopic mechanism 323 of the differential adjustment component 32 is independently driven, and can adjust the telescopic amount for the distance deviation at the cable inlet and cable outlet ends respectively, to achieve targeted pitch attitude correction, quickly restore the distance at both ends to the preset value, maintain the collinearity of the detection channel 411 and the cable 100 axis, and adjust the response quickly and accurately. The displacement sensing mechanism 5 uses a displacement sensor, which has high detection accuracy and fast response speed, and can provide real-time distance signal feedback. It works with the electric cylinder or electric push rod, which is the telescopic mechanism 323, to achieve precise telescopic control, forming a fast adjustment closed loop. It is adapted to the dynamic swing of the cable 100 to ensure the real-time attitude correction. Moreover, the electric cylinder or electric push rod is stable in operation, has strong load capacity, and long service life, and is suitable for long-term dynamic detection conditions, reducing the frequency of equipment maintenance and improving the reliability and stability of the device.

[0108] Please combine Figures 1 to 4 The following is an example illustrating a testing method for a non-destructive testing device for dynamically loaded cables provided in this application. The method includes the following steps:

[0109] Step S1, Device Reset and Coarse Positioning: Control the movement of the X-axis slide 11 and Y-axis slide 12 of the horizontal positioning mechanism 1, drive the composite detection mechanism 4 to move synchronously, so that the geometric center of the composite detection mechanism 4 is roughly aligned with the axis of the cable 100.

[0110] Step S2, Rotation Alignment and Attitude Adaptation: The drive motor 23 of the slewing adjustment mechanism 2 rotates, causing the turntable 22 and the upper components to rotate around the Z-axis, aligning the axis of the composite detection mechanism 4 with the yaw direction of the cable 100. If the cable 100 swings laterally, the drive motor 23 drives the slewing adjustment mechanism 2 to dynamically adjust, ensuring that the composite detection mechanism 4 is always aligned with the swing direction of the cable 100. Simultaneously, the telescopic mechanism 323 of the adaptive attitude adjustment mechanism 3 extends, bringing the floating platform 33 and the composite detection mechanism 4 closer to the cable 100.

[0111] Step S3, Differential Leveling: During the approach process in step S2, the two displacement sensing mechanisms 5 detect the actual distance between the cable inlet end, the cable outlet end and the cable 100, respectively, and feed the distance signal back to the host computer. If the actual distances at both ends are inconsistent, the host computer controls the telescopic mechanism 323 of the two differential adjustment components 32 to perform differential telescopic extension and retraction, adjusting the pitch angle of the floating platform 33 until the distance readings at both ends are consistent, thus achieving parallel alignment between the composite detection mechanism 4 and the cable 100.

[0112] Step S4, Flexible Clamping and Concentric Locking: While maintaining the parallel alignment, continue to control the extension mechanism 323 to extend, driving the floating platform 33 to rise until the rolling wheel 422 of the guide unit 42 is engaged with the surface of the cable 100. The mechanical limiting effect of the rolling wheel 422 is used to forcibly correct minor deviations, so that the detection channel 411 of the excitation flaw detection unit 41 and the cable 100 remain concentric.

[0113] Step S5: Synchronous detection, activate the excitation flaw detection unit 41 and the vision inspection unit 43. As the cable 100 rises and falls relative to the device, the excitation flaw detection unit 41 collects the leakage magnetic signals generated by defects such as broken wires inside the cable 100 in real time, and the vision inspection unit 43 synchronously collects the image information of the outer surface of the cable 100.

[0114] Step S6: Data acquisition and analysis. Based on the position information fed back by the displacement sensing mechanism 5, the host computer aligns the leakage magnetic signal and image information acquired in step S5, and accurately identifies the internal broken wire location and external wear area of ​​the cable 100 by combining the two data, and generates a detection report.

[0115] This detection method corrects attitude deviations step by step through coarse positioning, rotational centering, differential leveling, and concentric locking. First, the X-axis slide 11 and Y-axis slide 12 of the horizontal positioning mechanism 1 are moved to achieve coarse positioning of the composite detection mechanism 4. Then, the drive motor 23 of the rotational adjustment mechanism 2 drives the rotary turntable 22 to rotate and align with the yaw direction of the cable 100 and dynamically follow the swing. The adaptive attitude adjustment mechanism 3 synchronously approaches the cable 100. Subsequently, the differential adjustment component 32's telescopic mechanism 323 is differentially telescopically extended and retracted through feedback signals from two displacement sensing mechanisms 5 to adjust the pitch angle of the floating platform 33 to achieve parallel alignment. Finally, the rolling wheel 422 of the guide unit 42 is used to flexibly clamp and lock the concentricity, gradually improving the coaxiality to avoid insufficient one-step adjustment accuracy and adapting to the complex dynamic offset conditions of the cable 100. During synchronous testing, the positional information from the displacement sensing mechanism 5 is combined to align the leakage magnetic signal from the excitation flaw detection unit 41 with the image information from the visual inspection unit 43. This accurately corresponds to internal and external defects at the same location on the cable 100, clearly defining the defect location, extent, and severity, thus improving the accuracy and completeness of the analysis. The entire process is highly automated, adapting to continuous lifting and lowering conditions of the cable 100 without manual intervention. This eliminates work interruptions, improving testing efficiency while avoiding human error and ensuring consistent results. The flexible clamping method balances testing accuracy with cable 100 surface protection, making it suitable for various non-destructive testing needs of load-bearing cables and highly practical.

[0116] In the description of this invention, it should be understood that the terms "left side," "right side," "upper part," "lower part," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. "First," "second," etc., do not indicate the importance of the components, and therefore should not be construed as a limitation of this invention. The specific dimensions used in this embodiment are only for illustrating the technical solution and do not limit the scope of protection of this invention.

Claims

1. A non-destructive testing device for dynamically load-bearing cables, characterized in that, Used for flaw detection of cables (100) during lifting and lowering, including: A horizontal positioning mechanism (1) is used for bidirectional position adjustment in the horizontal plane; A rotary adjustment mechanism (2) is rotatably disposed at the output end of the horizontal positioning mechanism (1); An adaptive attitude adjustment mechanism (3) is provided at the adjustment end of the rotary adjustment mechanism (2) and has multiple independently driveable telescopic ends; The composite inspection mechanism (4) is located at the telescopic end of the adaptive attitude adjustment mechanism (3); its interior is provided with an inspection channel (411) through which the cable (100) passes; it can simultaneously perform internal magnetic leakage flaw detection and external visual flaw detection on the cable (100) that passes through. Multiple displacement sensing mechanisms (5) are spaced apart on the adaptive attitude adjustment mechanism (3) along the extension direction of the cable (100) to detect the distance between themselves and the surface of the cable (100) in real time and to feed back the distance signal. The adaptive attitude adjustment mechanism (3) can differentially control the extension and retraction of each adjustment end based on the distance signal fed back by each displacement sensing mechanism (5) in order to dynamically correct the spatial attitude of the composite detection mechanism (4) and maintain the axis of the detection channel (411) and the axis of the cable (100) collinear.

2. The non-destructive testing device for dynamic load-bearing cables according to claim 1, characterized in that, The horizontal positioning mechanism (1) includes an X-axis slide (11) and a Y-axis slide (12). The X-axis slide (11) is arranged along the X-axis and is provided with an X-axis guide rail (111). The Y-axis slide (12) is driven by the first ball screw nut pair (13) and slides with the X-axis guide rail (111) to realize the X-axis translation adjustment. The Y-axis slide (12) is arranged along the Y-axis and is provided with a Y-axis guide rail (121). The rotary adjustment mechanism (2) is driven by the second ball screw nut pair (14) and slides with the Y-axis guide rail (121) to realize the Y-axis translation adjustment.

3. The non-destructive testing device for dynamic load-bearing cables according to claim 2, characterized in that, The rotary adjustment mechanism (2) includes a base (21), a rotary turntable (22) rotatably mounted on the base (21), and a drive motor (23) for driving the rotary turntable (22) to rotate. The base (21) is connected to the Y-axis slide (12).

4. The non-destructive testing device for dynamic load-bearing cables according to claim 3, characterized in that, The adaptive attitude adjustment mechanism (3) includes: The base plate (31) is connected to the rotary table (22) and rotates synchronously with the rotary table (22); Two differential adjustment components (32) are spaced apart on the base plate (31) along the extension direction of the cable (100); each differential adjustment component (32) has an independent telescopic end and can perform telescopic action independently; The floating platform (33) has its bottom hinged to the telescopic end of each of the differential adjustment components (32) via a hinge structure; its pitch attitude can be adjusted with the differential telescopic extension of the differential adjustment components (32); The composite detection mechanism (4) and the displacement sensing mechanism (5) are both installed on the floating platform (33) and their attitudes are adjusted synchronously with the movement of the floating platform (33).

5. The non-destructive testing device for dynamic load-bearing cables according to claim 4, characterized in that, Each of the differential adjustment components (32) includes: Two sets of sliding fit parts (321) are disposed opposite to each other on the base plate (31) along the X-axis direction; The sliding frame (322) includes two sets of first sliding parts (3221) arranged opposite to each other, a top plate (3222) and a connecting rod (3223). The two sets of first sliding parts (3221) are connected to the top plate (3222) through the connecting rod (3223) and are respectively slidably engaged with the sliding engagement part (321) on the same side to achieve vertical guidance. The top plate (3222) is provided with second sliding parts (3224) on both sides along the Y-axis direction. The two ends of each second sliding part (3224) are respectively slidably engaged with the sliding engagement part (321) on the same side. The telescopic mechanism (323) has its fixed end connected to the base plate (31) and its telescopic end connected to the lower surface of the top plate (3222) of the sliding frame (322), and is used to drive the sliding frame (322) to rise and fall along the Z-axis; The floating platform (33) is hinged to the sliding frame top plate (3222) of the corresponding differential adjustment component (32) through two bottom hinge seats, forming a pitch-hinged structure.

6. The non-destructive testing device for dynamic load-bearing cables according to claim 5, characterized in that, Each set of sliding fit parts (321) includes two columns (3211) arranged at intervals along the Y-axis and a Z-axis slide rail (3212) mounted on each column (3211). Each of the first sliding parts (3221) includes a first connecting plate (3221a) and two sliding grooves (3221b) installed on the first connecting plate (3221a). Each sliding groove (3221b) corresponds to a Z-axis sliding rail (3212) on the same side column (3211) for sliding engagement. One end of the connecting rod (3223) is connected to the first connecting plate (3221a) on the same side, and the other end is connected to the top plate (3222) of the sliding frame (322) to form a stable support. Each set of second sliding parts (3224) includes a second connecting plate (3224a) and auxiliary sliding grooves (3224b) opened at both ends of the second connecting plate (3224a) in the X-axis direction. The auxiliary sliding grooves (3224b) at both ends of the second connecting plate (3224a) are respectively slidably engaged with the Z-direction slide rail (3212) on the same side column (3211).

7. The non-destructive testing device for dynamic load-bearing cables according to claim 5, characterized in that, Composite testing institutions (4) include: The excitation flaw detection unit (41) is mounted on the bearing surface of the floating platform (33) by a bracket; the detection channel (411) is provided inside it for establishing an axial magnetic field on the cable (100) and picking up leakage magnetic signals. Two sets of guide units (42) are respectively located at both ends of the axial direction of the excitation flaw detection unit (41); each set of guide units (42) includes multiple telescopic brackets (421) and multiple rolling wheels (422). The telescopic brackets (421) are connected to the excitation flaw detection unit (41), and the multiple rolling wheels (422) are evenly arranged circumferentially through the telescopic brackets (421); by adjusting the telescopic amount of the telescopic brackets (421), the wheel surfaces of the multiple rolling wheels (422) are made to roll in close contact with the outer circumferential surface of the cable (100) to achieve guidance and limiting. A visual inspection unit (43) is disposed at one axial end of the excitation flaw detection unit (41); it includes a support frame (431), multiple cameras (432) and a ring light (433); the support frame (431) is connected to the excitation flaw detection unit (41), the multiple cameras (432) are installed at the end of the support frame (431) and arranged circumferentially, with the camera ends all facing the outer circumferential surface of the cable (100) for acquiring images of the outer circumferential surface of the cable (100); the ring light (433) is installed at the end of the support frame (431) to provide uniform illumination for the cameras (432) to acquire images.

8. The non-destructive testing device for dynamic load-bearing cables according to claim 7, characterized in that, The excitation flaw detection unit (41) includes: Tubular armature (412); The bushing (413) includes a sleeve body (4131) and retaining rings (4132) provided at the openings at both ends; the cylindrical armature (412) is provided between the two retaining rings (4132), and the sleeve body (4131) is provided in the inner cavity of the cylindrical armature (412); Two spaced-apart annular permanent magnets (414) are both sleeved on the sleeve (4131) and connected to the sleeve (4131) to generate an axial magnetic field; Two spaced magnetic rings (415) are both sleeved on the sleeve (4131) and connected to the sleeve (4131), located between the two annular permanent magnets (414), and respectively abutting and connected to the annular permanent magnets (414) on the same side, for converging magnetic fields; Two sets of probes (416) are symmetrically arranged on the front and rear sides of the sleeve (4131); each set of probes (416) is spaced apart along the X-axis and is respectively installed on the outer peripheral wall of the magnetic ring (415) on the same side, and connected to the annular permanent magnet (414) on the same side, for conducting the magnetic field to the cable (100); each set of probes (416) consists of two probes, and the two probes (416) are symmetrically arranged on the front and rear sides of the sleeve (4131); A Hall element front plate (417) is sleeved on the sleeve (4131) and connected to the sleeve (4131), and is located between the two magnetic rings (415) for picking up the leakage magnetic signal of the cable (100) and transmitting it to the host computer; Among them, the cylindrical armature (412), each annular permanent magnet (414), each probe shoe (416), and the Hall element front plate (417) are all symmetrically split structures, and the two symmetrical parts of the cylindrical armature (412) are locked by multiple buckles (418).

9. The non-destructive testing device for dynamic load-bearing cables according to claim 4, characterized in that, The displacement sensing mechanism (5) is configured as two, which are respectively arranged on the floating platform (33) corresponding to the cable inlet and cable outlet of the composite detection mechanism (4); When the cable (100) swings during the lifting process, causing the actual distance between each displacement sensing mechanism (5) and the cable (100) to deviate from the preset distance, the telescopic mechanism (323) of the two differential adjustment components (32) performs telescopic movement individually to adjust the distance between the corresponding displacement sensing mechanism (5) and the cable (100) to the preset distance, thereby maintaining the cable (100) and the detection channel (411) on the same axis; The displacement sensing mechanism (5) is a displacement sensor; the telescopic mechanism (323) is an electric cylinder or an electric push rod.

10. A testing method for a non-destructive testing device for a dynamic load-bearing cable, applied to the non-destructive testing device for the dynamic load-bearing cable as described in claim 8, characterized in that, Includes the following steps: Step S1, Device Reset and Coarse Positioning: Control the movement of the X-axis slide (11) and Y-axis slide (12) of the horizontal positioning mechanism (1), drive the composite detection mechanism (4) to move synchronously, so that the geometric center of the composite detection mechanism (4) is roughly aligned with the axis of the cable (100); Step S2, Rotation Alignment and Attitude Adaptation: The drive motor (23) of the drive rotation adjustment mechanism (2) is turned, causing the rotary table (22) and the upper components to rotate around the Z-axis, so that the axial direction of the composite detection mechanism (4) is consistent with the yaw direction of the cable (100); if the cable (100) swings laterally, the drive motor (23) drives the rotation adjustment mechanism (2) to dynamically follow and adjust, so that the composite detection mechanism (4) is always aligned with the swing direction of the cable (100); at the same time, the telescopic mechanism (323) of the drive adaptive attitude adjustment mechanism (3) extends, causing the floating platform (33) and the composite detection mechanism (4) to approach the cable (100). Step S3, Differential Leveling: During the approach process in step S2, the two displacement sensing mechanisms (5) respectively detect the actual distance between the cable inlet end and the cable outlet end and the cable (100), and feed the distance signal back to the host computer; if the actual distances at both ends are inconsistent, the host computer controls the telescopic mechanism (323) of the two differential adjustment components (32) to perform differential telescopic adjustment, adjust the pitch angle of the floating platform (33) until the distance readings at both ends are consistent, and realize the parallel alignment of the composite detection mechanism (4) and the cable (100); Step S4, Flexible clamping and concentric locking: While maintaining the parallel alignment, continue to control the extension mechanism (323) to extend, driving the floating platform (33) to rise until the rolling wheel (422) of the guide unit (42) is engaged in the surface of the cable (100). The mechanical limiting effect of the rolling wheel (422) is used to forcibly correct the small deviation, so that the detection channel (411) of the excitation flaw detection unit (41) and the cable (100) remain concentric. Step S5: Synchronous detection, turn on the excitation flaw detection unit (41) and the vision detection unit (43); as the cable (100) rises and falls and generates relative motion with the device, the excitation flaw detection unit (41) collects the leakage magnetic signal generated by the broken wire defect inside the cable (100) in real time, and the vision detection unit (43) collects the image information of the outer surface of the cable (100) synchronously. Step S6: Data acquisition and analysis. Based on the position information fed back by the displacement sensing mechanism (5), the host computer aligns the leakage magnetic signal and image information acquired in step S5, and accurately identifies the internal broken wire position and external wear area of ​​the cable (100) by combining the two data, and generates a detection report.

Images