Bridge cable detection device and detection method

Abstract

The invention relates to the technical field of detection devices, in particular to a bridge inhaul cable detection device and method, and the device comprises a supporting cylinder which walks in the length direction of an inhaul cable, and an electromagnetic coil which is arranged in the supporting cylinder. The electromagnetic coil is used for generating a magnetic field under a power-on condition and enabling the local inhaul cable corresponding to the electromagnetic coil to generate a magnetization effect; during detection, the detection unit detects a certain position on the inhaul cable, that is, the detection surface is the surface perpendicular to the axis of the inhaul cable, so that all steel strands in the inhaul cable at the detection position can be detected, and meanwhile, the detection device can move along the length direction of the inhaul cable, so that the detection accuracy is improved. Compared with a traditional mode of detecting the steel strands one by one, the detection mode is more efficient and direct, and operation is simpler and more convenient; as the device moves on the inhaul cable, the variable quantity of the distance between the device and the inhaul cable is small, the anti-interference capability is high, and the detection precision is high.

Description

Technical Field

[0001] The present invention relates to the technical field of detection devices, and in particular to a bridge cable detection device and a detection method. Background Art

[0002] Bridge cables are the core load-bearing components of large-span bridges such as cable-stayed bridges and suspension bridges. Their health status is directly related to the overall safety and service life of the bridge. Cables are usually composed of multiple steel strands, and they are subjected to complex static and dynamic loads and environmental corrosion for a long time. They are prone to defects such as steel strand breakage, rust, and fatigue damage. If these defects are not detected and handled in time, they may lead to cable failure and even cause catastrophic accidents such as bridge collapse.

[0003] Since the defects of steel strands are generally located inside the cables, the commonly used video observation method cannot check the internal conditions of the cables. Ultrasonic testing is required. During the testing, the anchor cover at the end of the cable is opened, the end of the steel strand to be tested is polished and smooth, and the ultrasonic generator is tightly connected to the steel strand. The ultrasonic generator will emit ultrasonic waves into the steel strand. When the ultrasonic wave encounters defects such as broken steel strands, it will be reflected, and the reflected wave will be received and analyzed to realize the detection of the steel strand. However, this detection method requires the steel strands to be tested one by one, and the preparation work is relatively cumbersome, resulting in the detection work taking a lot of manpower and time. In addition, since ultrasonic waves are easily disturbed by vibration, their detection accuracy is poor. Summary of the invention

[0004] The present invention provides a bridge cable detection device and a detection method, which can effectively solve the problems in the background technology.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is: A bridge cable detection device includes a support tube that moves along the length direction of the cable and an electromagnetic coil arranged in the support tube. The electromagnetic coil is used to generate a magnetic field when powered and to cause a magnetization effect on the local cable corresponding to the electromagnetic coil. A detection unit for detecting the magnetic field strength generated by the local cable is arranged in the support tube.

[0006] In some embodiments of the present invention, the electromagnetic coil is sleeved on the cable, and each coil on the electromagnetic coil is arranged along the radial direction of the support tube.

[0007] In some embodiments of the present invention, the electromagnetic coil is in the shape of a vortex surrounded by a number of conductive wires or a shape composed of a plurality of open circular rings arranged in sequence from the inside to the outside, and the heads of the open circular rings are connected to each other, and the tails of the open circular rings are connected to each other.

[0008] In some embodiments of the present invention, the cross-sectional shape of each coil on the electromagnetic coil is square.

[0009] In some embodiments of the present invention, when the electromagnetic coil moves along the length direction of the cable, the electromagnetic coil rotates around the circumference of the cable or remains stationary.

[0010] In some embodiments of the present invention, the electromagnetic coil and the detection unit are arranged in a plurality along the length direction of the cable, and a plurality of support plates are correspondingly arranged in the support tube, and the electromagnetic coil and the detection unit are installed on the support plates.

[0011] In some embodiments of the present invention, the support tube is divided into a first panel and a second panel along its radial direction, the support disk is divided into a fan plate 1 and a fan plate 2 along the radial direction of the support tube, and the electromagnetic coil on the support disk is correspondingly divided, and the detection unit is installed on the fan plate 1 or the fan plate 2; Wherein, the first puzzle board and the second puzzle board are connected via a plurality of clamping structures.

[0012] In some embodiments of the present invention, the number of turns of the electromagnetic coil connected to the circuit can be adjusted.

[0013] In some embodiments of the present invention, along the axis direction of the support tube, a plurality of adjustment plates are provided on both sides of the first puzzle board and the second puzzle board, and the angles of the adjustment plates on the first puzzle board or the second puzzle board can be adjusted, and each of the adjustment plates is provided with a roller and a driving motor for providing power to the roller; Wherein, the outer wall of the roller is wrapped with a rubber layer.

[0014] A bridge cable detection method comprises the following steps: The first panel and the second panel are butt-jointedly mounted on the cable, and the first panel and the second panel are fastened together by a plurality of clamping structures; The fan plate 1 and the fan plate 2 on each support disk in the support cylinder are butted against each other, and the electromagnetic coil is formed; Adjusting a plurality of adjustment plates so that a plurality of rollers are in contact with the cable at the same time, thereby fixing the device on the cable; According to the diameter of the cable, adjust the number of turns of the electromagnetic coil connected to the circuit; Each electromagnetic coil is energized to generate magnetic induction in the local cables in the support tube; The detection unit detects the magnetic field strength around the local cable corresponding to each electromagnetic coil; Each driving motor is started to move the device along the length direction of the cable. Each detection unit performs real-time detection on the cable. When the detection unit detects a sudden change in the magnetic field at a certain position on the cable, there is a defect inside the cable at that position.

[0015] The technical solution of the present invention can achieve the following technical effects: During detection, the detection unit detects a certain position on the cable, that is, the detection surface is a surface perpendicular to the cable axis, so all steel strands in the cable at the detection position can be detected. At the same time, since the detection device can move along the length direction of the cable, the cable and its interior can be fully and quickly detected. Compared with the traditional method of detecting steel strands one by one, the detection method of the present invention is more efficient and direct, and its operation is simpler; since the device moves on the cable, the change in the distance between the device and the cable is small, the anti-interference ability is strong, and the detection accuracy is high. At the same time, the detection method can realize real-time and continuous detection of the cable; by adopting the method of detecting the magnetic field strength, a non-contact detection effect of the cable can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 is a schematic structural diagram of a support cylinder in an embodiment of the present invention; Figure 3 yes Figure 2 Schematic diagram of explosion structure; Figure 4 is a schematic diagram of an electromagnetic coil in a vortex shape in an embodiment of the present invention; Figure 5 is a schematic diagram of an electromagnetic coil in an embodiment of the present invention that is formed of a plurality of open circular rings; Figure 6 yes Figure 4 Schematic diagram of explosion structure; Figure 7 is a schematic structural diagram of a conductive wheel in an embodiment of the present invention; Figure 8 It is a schematic diagram of the exploded structure of the clamping structure in the embodiment of the present invention.

[0018] Reference numerals: 100. Cable; 200, support cylinder; 201, first panel; 202, second panel; 203, clamping structure; 204, insert sleeve; 205, insert plate; 206, cone surface; 207, slope surface; 208, push rod; 209, spring; 210, adjustment plate; 211, roller; 212, drive motor; 300, electromagnetic coil; 301, support plate; 302, fan plate 1; 303, fan plate 2; 304, adjustment rod; 305, conductive wheel; 306, conductive sheet; 400, detection unit; 500, chassis; 501, battery pack; 502, controller. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0021] like Figures 1 to 4 As shown, a bridge cable detection device of the present invention includes a support tube 200 that moves along the length direction of the cable 100 and an electromagnetic coil 300 arranged in the support tube 200. The electromagnetic coil 300 is used to generate a magnetic field when powered and to cause a local cable 100 corresponding to the electromagnetic coil 300 to produce a magnetization effect. A detection unit 400 for detecting the magnetic field strength generated by the local cable 100 is arranged in the support tube 200.

[0022] In the present invention, the support cylinder 200 can move on the cable 100 by various means such as rollers and pull belts, so that the support cylinder 200 can drive the electromagnetic coil 300 and the detection unit 400 therein to move along the length direction of the cable 100, so as to use the electromagnetic coil 300 and the detection unit 400 to achieve a comprehensive inspection of the cable 100; the electromagnetic coil 300 can be located on the side of the cable 100, or can be sleeved on the cable 100. As long as the magnetic field generated by the electromagnetic coil 300 can act on the cable 100 and cause the cable 100 to produce a magnetization effect, the detection unit 400 can be used to detect the magnetic field generated by the cable 100. Therefore, the specific installation method of the electromagnetic coil 300 is not limited, and it is within the protection scope of the present invention; of course, in order to concentrate the magnetic field, the electromagnetic coil 300 is generally sleeved on the cable 100; In actual use, a base frame 500 can be installed at the bottom of the support cylinder 200, and a battery pack 501, a controller 502 and other structures can be set in the base frame 500, which can provide power support for the electromagnetic coil 300 and the detection unit 400, and can also realize functions such as automatic control detection and transmission of detection results; and the setting of the base frame 500 and the structure thereon can provide a counterweight for the detection device, so that the position of the support cylinder 200 on the cable 100 remains unchanged, and the support cylinder 200 is prevented from rotating randomly in the circumference of the cable 100, and the detection unit 400 cannot move along a specific trajectory on the cable 100, resulting in inaccurate detection; in some embodiments, when the detection unit 400 detects the magnetic field on the local cable 100, it can also adopt a method of pulse excitation charging of the electromagnetic coil 300, and capture the transient magnetic field response by briefly energizing, which can effectively save energy, and the magnetic field sensitivity of the transient detection is high, but continuous detection cannot be achieved in this way, so the specific detection method can be determined according to actual needs; the detection unit 400 can be a Hall effect sensor, an atomic magnetometer, a magnetoresistive sensor, etc.; During detection, the detection unit 400 detects a certain position on the cable 100, that is, the detection surface is a surface perpendicular to the axis of the cable 100, and therefore all the steel strands in the cable 100 at the detection position can be detected. At the same time, since the detection device can move along the length direction of the cable 100, the cable 100 and its interior can be fully and quickly detected. Compared with the traditional method of detecting steel strands one by one, the detection method of the present invention is more efficient and direct, and its operation is simpler; since the device maintains a fixed distance from the cable 100 when moving on the cable 100, the effect of the external air flow on the cable 100 will cause the device to move synchronously, so it has a strong anti-interference ability and a high detection accuracy. At the same time, this detection method can realize real-time and continuous detection of the cable 100; by adopting the method of detecting the magnetic field strength, a non-contact detection effect of the cable 100 can be achieved.

[0023] Optimized to the above implementation, such as Figure 4 As shown, the electromagnetic coil 300 is sleeved on the cable 100, and each coil on the electromagnetic coil 300 is arranged along the radial direction of the support tube 200; In order to improve the uniformity of the magnetic field around the cable 100 and facilitate the detection of the detection unit 400, the electromagnetic coil 300 can be sleeved on the cable 100, so that the magnetic field inside the electromagnetic coil 300 will be concentrated near the cable 100. At the same time, by arranging the coils on the electromagnetic coil 300 along the radial direction of the support tube 200, the inner magnetic field generated by each coil can be concentrated near the cable 100, further improving the magnetic field strength and the magnetic field gathering effect. In this way, the interference of external factors such as geomagnetism, temperature, and vehicle driving on the magnetic field can be reduced, thereby improving the detection accuracy.

[0024] Based on the limitation of the arrangement of the coils on the electromagnetic coil 300, such as Figures 4 to 5 As shown, the electromagnetic coil 300 can be a vortex shape surrounded by several wires or a shape composed of multiple open circular rings arranged in sequence from the inside to the outside, and the heads of the open circular rings are connected to each other, and the tails of the open circular rings are connected to each other; the above two structural forms can achieve the effect of magnetic field concentration, and the first form can be regarded as a series connection of multiple single coils, and the second form can be regarded as a parallel connection of multiple single coils; when the electromagnetic coil 300 adopts a vortex shape design, the current flows along a continuous path to form a shape similar to a snail shell or a vortex. This arrangement can improve the concentration of the magnetic field. The vortex shape helps to concentrate the magnetic field in the central area, that is, the location of the cable 100. Thereby, the magnetization effect on the cable 100 is enhanced. At the same time, due to the series structure, the current has good consistency in the entire coil system, which helps to ensure that the generated magnetic field is uniform and stable, which is conducive to accurate detection. Another design can optimize the magnetic field distribution. By reasonably arranging the size and spacing of each open ring, the magnetic field can be more evenly distributed around the cable 100, reducing the inhomogeneity of the magnetic field, thereby improving the detection accuracy. The parallel connection ensures that even if a problem occurs in a certain part, the other parts can still work normally, increasing the reliability and redundancy of the system. At the same time, the parallel design also facilitates power distribution, ensuring that each coil can obtain sufficient current to generate the required magnetic field strength. In actual use, the choice of coil arrangement depends on the specific application requirements and technical conditions. The vortex shape is suitable for situations where a highly concentrated strong magnetic field is required, while the parallel connection of multiple open circular rings is more suitable for situations where uniform magnetic field coverage is sought. In addition, factors such as portability, cost, and ease of maintenance in actual operation will also affect the choice of design scheme.

[0025] Optimized to the above implementation, such as Figure 6 As shown, the cross-sectional shape of each coil on the electromagnetic coil 300 is a square; Coils with square cross-sections can be arranged more closely in the same space than coils with circular cross-sections. Since the electromagnetic coil 300 needs to be sleeved on the cable 100, and the concentration and uniformity of its internal magnetic field are crucial to the detection effect, the use of a square cross-section can more efficiently utilize limited space and increase the wire density per unit volume, thereby enhancing the strength and concentration of the magnetic field. At the same time, the propagation path of the magnetic field in the coil will be affected by the cross-sectional shape of the wire. Compared with a circular cross-section, a coil with a square cross-section can better reduce irregular gaps in the magnetic circuit, reduce the magnetic resistance effect, and make the magnetic field distribution more uniform, thereby improving the sensitivity and accuracy of the detection. In actual processing, square cross-section coils are easier to accurately position and fix during manufacturing and assembly. For example, square coils can be stacked and arranged using simple fixtures or molds to ensure consistent spacing between coils and avoid magnetic field distribution deviations caused by uneven arrangement.

[0026] In actual use, the square cross-section coil can achieve efficient magnetic field generation at a lower current input due to its strong magnetic field concentration and uniform distribution, thereby saving energy consumption; the square cross-section coil is more stable in mechanical structure and is not prone to deformation or displacement. This is very important for the movement and long-term operation of the detection device on the cable 100, and can ensure the continuity and accuracy of the detection process; the cable 100 is usually in a complex environment and may face adverse conditions such as vibration and temperature changes. The design of the square cross-section coil makes it more durable and adaptable, and can maintain stable performance in harsh environments.

[0027] Optimized in the above implementation, when the electromagnetic coil 300 moves along the length direction of the cable 100, the electromagnetic coil 300 performs a rotational motion or remains stationary around the circumferential direction of the cable 100; In the present invention, the rotational motion enables the electromagnetic coil 300 to rotate around the circumference of the cable 100 with the cable 100 as the central axis, thereby continuously detecting various angles of the cable 100 . This design can cover the entire circumferential area of ​​the outer surface of the cable 100 and the internal steel strands, avoiding blind spots caused by fixed-angle detection. At the same time, this method can determine the specific position of the defective steel strand on the cross section of the cable 100 according to the different magnetic field strengths detected by the detection unit 400 at different positions in the circumferential direction of the cable 100, which is convenient for further positioning of the defective position, that is, this method can not only locate the position of the defect in the length direction of the steel strand, but also locate the specific position of the defect on the cross section of the cable 100; when the static mode is adopted, when the electromagnetic coil 300 moves along the length direction of the cable 100, it remains stationary around the circumferential direction of the cable, that is, a fixed angle, so that there is no need for a rotating drive device, reducing the complexity and cost of the device, which is suitable for scenarios that are sensitive to cost or have high requirements for portability, and at a fixed angle, the acquisition and processing of detection signals are simpler, and rapid scanning can be achieved, which is suitable for scenarios with high requirements for detection efficiency, such as daily inspections.

[0028] Optimized to the above implementation, such as Figure 3 to Figure 4 As shown, the electromagnetic coil 300 and the detection unit 400 are arranged in a plurality along the length direction of the cable 100, and a plurality of support plates 301 are correspondingly arranged in the support cylinder 200, and the electromagnetic coil 300 and the detection unit 400 are both mounted on the support plates 301; By arranging a plurality of electromagnetic coils 300 and detection units 400 in the support tube 200, multiple detections of the cable 100 can be achieved when the device moves along the length direction of the cable 100, thereby effectively improving the detection accuracy. In addition, this arrangement can use the electromagnetic coils 300 located on the outside to block external interference, so that the plurality of electromagnetic coils 300 located in the middle and the detection units 400 thereon can accurately detect the cable 100; the support plate 301 is mainly used to provide an installation position for the electromagnetic coils 300 and the detection unit 400. Specifically, a groove can be opened on the support plate 301, and the electromagnetic coil 300 can be installed in the groove. The support plate 301 is made of non-metallic material, and the detection unit 400 can be installed on the circumferential inner wall of the support plate 301.

[0029] Optimized to the above implementation, such as Figures 2 to 6 As shown, the support cylinder 200 is divided into a first panel 201 and a second panel 202 along its radial direction, the support disk 301 is divided into a fan plate 1 302 and a fan plate 2 303 along the radial direction of the support cylinder 200, and the electromagnetic coil 300 on the support disk 301 is correspondingly divided, and the detection unit 400 is installed on the fan plate 1 302 or the fan plate 2 303; The first puzzle board 201 and the second puzzle board 202 are connected via a plurality of snap-fit ​​structures 203; In the present invention, since the support tube 200 needs to be sleeved on the cable 100, the support tube 200 and the electromagnetic coil 300 and the support plate 301 therein need to be spliced, that is, the first puzzle plate 201 and the second puzzle plate 202 form the support tube 200, the fan plate 1 302 and the fan plate 2 303 form the support plate 301, and the base frame 500 is installed on the first puzzle plate 201 or the second puzzle plate 202; in order to use the splicing method of the support plate 301, the electromagnetic coil 300 can also be installed on the fan plate 1 302 and the fan plate 2 303 in a manner composed of multiple arc-shaped wires; The clamping structure 203 can be adopted as follows Figure 8In the structural mode shown, the clamping structure 203 includes a socket 204 and a plug plate 205, the socket 204 is installed on the second puzzle board 202, and the plug plate 205 is installed on the first puzzle board 201. The bottom of the plug plate 205 is set to be prism-shaped, and the surface of the prism facing the socket 204 is a conical surface 206, and the surface of the prism away from the socket 204 is a slope surface 207. Both sides of the socket 204 are horizontally interspersed with a push rod 208, and the two push rods 208 are connected by a spring 209; when the first puzzle board 201 and the second puzzle board 202 are assembled, the prism on the plug plate 205 directly passes through the socket 204, and the socket 204 guides and When the top rod 208 moves from the conical surface 206 to the slope 207, the top rod 208 uses the slope 207 to generate a downward pushing force on the plug 205, so that the first puzzle board 201 and the second puzzle board 202 are pressed against each other and pressed tightly. In this way, the design of the slope 207 can achieve the purpose of locking the first puzzle board 201 and the second puzzle board 202, and can also achieve the effect of keeping the first puzzle board 201 and the second puzzle board 202 in close fit at all times.

[0030] Optimizing the above implementation, the number of turns of the electromagnetic coil 300 connected to the circuit can be adjusted; When the number of turns of the electromagnetic coil 300 connected to the circuit changes, the magnetic field strength generated by the electromagnetic coil 300 changes, thereby adjusting the detection sensitivity; in actual use, it can be as follows Figure 4 As shown, part of the electromagnetic coil 300 is exposed outside the support plate 301, one end of the electromagnetic coil 300 is connected to one end of the power supply, and the electromagnetic coil 300 that contacts with the conductive wheel 305 at a certain position on the electromagnetic coil 300 is connected to the other end of the power supply by means of the conductive wheel 305 being in contact with the conductive wheel 305 for electrical conduction, so that the electromagnetic coil 300 that contacts with the conductive wheel 305 is connected to the other end of the power supply, so that the part of the electromagnetic coil 300 between one end of the electromagnetic coil 300 and the conductive wheel 305 is the part connected to the power supply, and this part can generate a magnetic field when energized, and when the adjusting rod 304 moves and pushes the conductive wheel 305 to be fixed on the support plate 301, the conductive wheel 305 can contact with parts of the electromagnetic coil 300 of different circles, thereby adjusting the number of circles connected to the circuit; the adjusting rod 304 can slide through the second puzzle plate 202, and the movement of the adjusting rod 304 can provide moving power through a power structure such as a propulsion motor; as shown Figure 7 As shown, a plurality of conductive sheets 306 can be provided on the conductive wheel 305 , and the conductive sheets 306 are used to contact the electromagnetic coil 300 . Since the conductive sheets 306 are allowed to undergo elastic deformation, the conductive sheets 306 and the electromagnetic coil 300 can achieve a surface contact effect.

[0031] Optimized to the above implementation, such as Figure 3As shown, along the axis direction of the support tube 200, a plurality of adjustment plates 210 are arranged on both sides of the first puzzle plate 201 and both sides of the second puzzle plate 202, and the angle of the adjustment plates 210 on the first puzzle plate 201 or the second puzzle plate 202 can be adjusted, and each adjustment plate 210 is provided with a roller 211 and a driving motor 212 for providing power to the roller 211; The outer wall of the roller 211 is wrapped with a rubber layer.

[0032] In the present invention, since the support cylinder 200 needs to move on the cable 100, the driving motor 212 can be used to provide rotational power to the roller 211, so that the roller 211 can climb on the cable 100, and multiple rollers 211 can realize the fixed connection between the support cylinder 200 and the cable 100; when it is necessary to detect cables 100 of different diameters, the position of the roller 211 can be changed by adjusting the angle of the adjustment plate 210 on the second puzzle plate 202; in order to enhance the friction between the roller 211 and the cable 100 and increase the contact area, a rubber layer can be wrapped on the surface of the roller 211, and the extrusion deformation effect of the rubber layer is used to achieve the purpose of surface contact between the roller 211 and the cable 100.

[0033] A bridge cable detection method comprises the following steps: The first panel 201 and the second panel 202 are butt-jointed and sleeved on the cable 100, and the first panel 201 and the second panel 202 are fastened and connected by a plurality of clamping structures 203; The fan plate 1 302 and the fan plate 2 303 on each support disk 301 in the support cylinder 200 are connected to each other, and the electromagnetic coil 300 is formed; Adjusting a plurality of adjustment plates 210 so that a plurality of rollers 211 are in contact with the cable 100 at the same time, thereby fixing the device on the cable 100; According to the diameter of the cable 100, the number of turns of the electromagnetic coil 300 connected to the circuit is adjusted; Each electromagnetic coil 300 is energized to generate magnetic induction in the local cable 100 in the support tube 200; The detection unit 400 detects the magnetic field strength around the local cable 100 corresponding to each electromagnetic coil 300; Each driving motor 212 is started to move the device along the length direction of the cable 100. Each detection unit 400 performs real-time detection on the cable 100. When the detection unit 400 detects a sudden change in the magnetic field at a certain position on the cable 100, there is a defect inside the cable 100 at that position.

[0034] The method realizes the functional effect of non-contact detection through the interaction between the external magnetic field and the cable 100. This method can avoid detection interference caused by contact friction or transmission and improve detection accuracy. The detection unit 400 continuously collects data during movement to achieve the technical effect of real-time monitoring, and immediately feedbacks the defect location. By adjusting the number of coil turns to optimize the magnetic field strength, the leakage magnetic field changes of tiny defects can be captured. Multiple groups of electromagnetic coils 300 and detection units 400 are arranged along the length direction of the cable 100 to realize continuous scanning of the entire section of the cable. The detection method significantly improves the efficiency, accuracy and safety of bridge cable detection through the integrated design of magnetic field excitation-real-time sensing-automatic movement.

[0035] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A bridge cable detection device, characterized in that: It includes a support tube that moves along the length direction of the cable and an electromagnetic coil arranged in the support tube. The electromagnetic coil is used to generate a magnetic field when powered and to cause a magnetization effect on the local cable corresponding to the electromagnetic coil. A detection unit for detecting the magnetic field strength generated by the local cable is arranged in the support tube.

2. A bridge cable detection device according to claim 1, characterized in that: The electromagnetic coil is sleeved on the cable, and each coil on the electromagnetic coil is arranged along the radial direction of the support tube.

3. A bridge cable detection device according to claim 2, characterized in that: The electromagnetic coil is in the shape of a vortex surrounded by a number of conducting wires or a shape composed of a plurality of open circular rings arranged in sequence from the inside to the outside, and the heads of the open circular rings are connected to each other, and the tails of the open circular rings are connected to each other.

4. A bridge cable detection device according to claim 1, characterized in that: The cross-sectional shape of each coil on the electromagnetic coil is a square.

5. A bridge cable detection device according to claim 1, characterized in that: When the electromagnetic coil moves along the length direction of the cable, the electromagnetic coil rotates around the circumference of the cable or remains stationary.

6. A bridge cable detection device according to claim 1, characterized in that: The electromagnetic coil and the detection unit are arranged in a plurality along the length direction of the cable, and a plurality of support plates are correspondingly arranged in the support cylinder, and the electromagnetic coil and the detection unit are installed on the support plates.

7. A bridge cable detection device according to claim 6, characterized in that: The support tube is divided into a first panel and a second panel along its radial direction, the support disk is divided into a first fan plate and a second fan plate along the radial direction of the support tube, and the electromagnetic coil on the support disk is correspondingly divided, and the detection unit is installed on the first fan plate or the second fan plate; Wherein, the first puzzle board and the second puzzle board are connected via a plurality of clamping structures.

8. A bridge cable detection device according to claim 7, characterized in that: The number of turns of the electromagnetic coil connected to the circuit can be adjusted.

9. A bridge cable detection device according to claim 8, characterized in that: Along the axis direction of the support tube, a plurality of adjustment plates are arranged on both sides of the first puzzle plate and the second puzzle plate, and the angles of the adjustment plates on the first puzzle plate or the second puzzle plate can be adjusted, and each of the adjustment plates is provided with a roller and a driving motor for providing power to the roller; Wherein, the outer wall of the roller is wrapped with a rubber layer.

10. A bridge cable detection method, applicable to a bridge cable detection device according to claim 9, characterized in that: The steps include: The first panel and the second panel are butt-jointedly mounted on the cable, and the first panel and the second panel are fastened together by a plurality of clamping structures; The fan plate 1 and the fan plate 2 on each support disk in the support cylinder are butted against each other, and the electromagnetic coil is formed; Adjusting a plurality of adjustment plates so that a plurality of rollers are in contact with the cable at the same time, thereby fixing the device on the cable; According to the diameter of the cable, adjust the number of turns of the electromagnetic coil connected to the circuit; Each electromagnetic coil is energized to generate magnetic induction in the local cables in the support tube; The detection unit detects the magnetic field strength around the local cable corresponding to each electromagnetic coil; Each driving motor is started to move the device along the length direction of the cable. Each detection unit performs real-time detection on the cable. When the detection unit detects a sudden change in the magnetic field at a certain position on the cable, there is a defect inside the cable at that position.

Images