A bridge condition detection device and detection method

Abstract

The present invention discloses a device and method for detecting bridge conditions, which relate to the field of defect detection technology. The device comprises at least one acquisition device for collecting cable surface data. The acquisition device is arranged toward the cable axis. The detection device consists of two parts. The first part is a detection unit sleeved on the outside of the cable. The acquisition device is installed inside the detection unit. The detection unit is coaxially arranged with the steel cable. A drive component and an adjustment component are configured inside the detection unit. The adjustment component is connected to the drive component. The adjustment component includes at least one scraper that contacts the cable surface. When the detection unit moves along the axial direction of the cable, the scraper is used to scrape off stains on the cable surface. The second part is a tension unit. Adjacent detection units can be connected through the tension unit. The present application is set up in two parts, the first part is the detection unit, and the second part is the tension unit. The detection unit can be used alone to detect the cable and obtain image data of the cable's outer surface.

Description

Technical Field

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

[0002] Bridge condition significantly impacts safety, including structural integrity, load capacity, material degradation, environmental impacts, vibration, and dynamic loads. Bridge condition directly impacts its service life and safety performance. Regular inspection and maintenance are crucial to ensuring the long-term stability and safety of bridges.

[0003] Announcement No. CN115931907A discloses a cable inspection device for bridge inspection, which relates to the field of bridge inspection technology. The device comprises a semicircular sleeve, two of which are provided, each of which is provided with an annular mounting plate. An adjustment mechanism for controlling the position of the annular mounting plate is provided on one side of the semicircular sleeve. A detection camera is installed on one side of each annular mounting plate. A limiting mechanism is also provided on one side of the annular mounting plate. A support rod is fixedly installed on the upper surface of each semicircular sleeve, and an annular positioning plate is fixedly installed on the top of the support rod. The surface of the cable is photographed by the detection camera on the inner side of the annular mounting plate, and then viewed by staff, thereby completing the inspection of the cable surface. There is no need for staff to use lifting equipment to inspect the cable, which is safer, more efficient, and more convenient to use.

[0004] Common bridge cables generally have two structures: the first uses materials such as anti-corrosion grease as a direct protective layer on the steel cable, while the second uses a plastic coating on the outside of the steel cable to extend its service life and enhance its corrosion resistance. The different protection methods used determine the cable's outer profile. Existing inspection devices, such as the cable inspection device disclosed in Publication No. CN115931907A, are only capable of inspecting cables with plastic coatings and are not well suited for cables with anti-corrosion grease as a protective layer. Summary of the Invention

[0005] One of the purposes of the present invention is to provide a bridge condition detection device and detection method, which can be used to detect cables with an outer contour of an arc surface and an outer contour of a torsion surface, obtain flaws, defects and stains on the outer surface of the cable, and can connect two adjacent detection devices to obtain tension data of adjacent cables.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a bridge condition detection device, comprising at least one acquisition device for collecting cable surface data, the acquisition device being arranged toward the cable axis, the detection device consisting of two parts, the first part being a detection unit sleeved on the outside of the cable, the acquisition device being installed inside the detection unit, the detection unit being coaxially arranged with the steel cable, the detection unit being internally configured with a drive assembly, the drive assembly being configured with two motion modes corresponding to curved surface cables and twisted surface cables, the drive assembly changing the position of the detection unit outside the cable;

[0007] An adjusting assembly is connected to the driving assembly, the adjusting assembly includes at least one scraper contacting the surface of the cable, and the detection unit scrapes away stains on the surface of the cable through the scraper when the detection unit moves along the axial direction of the cable;

[0008] The second part is the tension unit, which is installed inside the detection unit. Adjacent detection units can be connected through the tension unit. When the tension unit is connected to the detection unit, it is used to determine the cable tension data.

[0009] In one or more embodiments of the present invention, the detection unit includes:

[0010] The mounting frame is of split design, and a snap ring is provided on the outside of the mounting frame for connecting and limiting the opening state of the mounting frame, and a plurality of protrusions extending outward are provided on the outside of the snap ring;

[0011] A guard plate is installed on the outside of the protrusion and fits with the clamping ring. The guard plate is bendable, and the clamping ring is used to limit and support the guard plate. A plurality of positioning holes are set on the end of the clamping ring away from the protrusion. The positioning holes are countersunk and the clamping ring is fixed to the outside of the mounting frame by positioning pins or screws.

[0012] The annular groove is arranged inside the mounting frame, an arc plate is arranged inside the annular groove, the arc plate is installed inside the annular groove, and the driving component is installed inside the arc plate.

[0013] In one or more embodiments of the present invention, the drive assembly includes:

[0014] A driving wheel contacts the cable and drives the detection unit to move up and down along the outer surface of the cable by rotating. A mounting shaft extending outward is provided in the middle of the driving wheel. The driving wheel is fixed in the middle of the mounting shaft. A connecting shaft is provided between adjacent mounting shafts. A bevel gear is provided between the connecting shaft and the mounting shaft for meshing transmission.

[0015] The driving motor is installed on the inner side of the arc plate, and is connected to the connecting shaft and drives the connecting shaft to rotate.

[0016] In one or more embodiments of the present invention, an elastic sheet is provided on the outside of the driving wheel to expand and change the outer contour of the driving wheel. An expansion cavity is formed between the elastic sheet and the driving wheel. A connecting cavity is formed in the middle of the driving wheel. The connecting cavity is connected to the expansion cavity. When the expansion cavity is in an expanded state, the elastic sheet expands outward and fits the curved surface of the cable. When the expansion cavity contracts, the elastic sheet contacts the outer surface of the driving wheel and fits the torsional surface of the cable.

[0017] The electromagnet is fixed on the inner side of the arc plate, and a magnetic ring is arranged in the middle of the driving wheel. The electromagnet and the magnetic ring cooperate to change the squeezing state of the communicating cavity, and the squeezing state of the communicating cavity changes the expansion or contraction of the expansion cavity.

[0018] In one or more embodiments of the present invention, the adjustment component includes:

[0019] A splint is fixed to the outside of the driving wheel, and the splint passes through the curved plate and extends to the back of the curved plate;

[0020] A positioning piece is fixed to the inner side of the scraper and supports the scraper, and the end of the scraper away from the positioning piece is configured to be tooth-shaped;

[0021] The clamping plates are connected to the positioning pieces, and the distance between the clamping plates is reduced to change the bending state of the scraper.

[0022] In one or more embodiments of the present invention, at least two groups of scrapers are arranged inside the mounting frame, and the two groups of scrapers are symmetrically arranged in the upper and lower parts. Each group of scrapers includes an upper plate and a lower plate. The upper plate is arranged in an arc shape. When the lower plate is squeezed by the clamping plate, it fits into the upper plate in an arc shape. When the distance between the clamping plates becomes larger, the lower plate is arranged in a straight line.

[0023] In one or more embodiments of the present invention, the tension unit includes:

[0024] A positioning ring is installed inside the mounting frame, and the positioning ring and the mounting frame are coaxially arranged;

[0025] The connecting frame is fixed to the outside of the mounting frame by bolts, a connecting rod is provided inside the connecting frame and extends into the mounting frame, a telescopic rod is provided at one end of the connecting rod away from the positioning ring, and the connecting rod and the telescopic rod are connected by a dynamometer;

[0026] One end of the connecting rod extending toward the mounting frame is connected to the positioning ring, and the telescopic rod drives the connecting rod to retract to detect the tension of the positioning ring.

[0027] In one or more embodiments of the present invention, a plurality of retractable positioning posts are provided on the inner side of a positioning ring, an annular hydraulic chamber is provided on the inner side of the positioning ring, the positioning posts extend into the interior of the hydraulic chamber, magnetic pressure plates are provided above and below the hydraulic chamber, and an electromagnetic block is provided on the outer side of the magnetic pressure plate. The electromagnetic block and the pressure plate are spaced apart by magnetic force to control the flow of the medium inside the hydraulic chamber.

[0028] The connecting contacts are respectively arranged on the outside of the positioning column and at one end of the connecting rod in contact with the positioning column, and the electromagnetic block is powered by the connecting contacts.

[0029] In one or more embodiments of the present invention, an electromagnetic column is provided at one end of the connecting rod contacting the positioning ring, and the electromagnetic column magnetically attracts the positioning ring when energized;

[0030] The connection contact position of the positioning ring is set to be sunken, and the connecting rod is connected to the positioning ring at the sunken position.

[0031] The present application also provides a bridge status detection method for use with the above-mentioned detection device, comprising the following steps:

[0032] Determine the size of the drive assembly according to the cable to be tested, install the drive assembly inside the mounting frame, and connect the mounting frame to the cable;

[0033] Adjust the driving assembly to a state corresponding to the outer surface of the cable through the adjusting assembly;

[0034] The scraper contacts the cable surface, and the driving component generates friction with the cable surface, which changes the position of the detection unit and obtains the cable surface data through the acquisition device;

[0035] The tension unit is used to connect adjacent detection units, and the tension data of the cable is measured through the tension unit.

[0036] Through the above technical solution, the present invention has the following beneficial effects:

[0037] 1. This application is set up in two parts, the first part is the detection unit, and the second part is the tension unit. The detection unit can be used alone to detect the cable, obtain image data of the outer surface of the cable, and determine whether there are defects on the outer surface of the cable based on the image data. The tension unit can be used to connect adjacent detection units to perform tension detection on the cable.

[0038] 2. By setting a deformable driving wheel, it can correspond to different states of the outer surface of the cable during use. Due to the different means of setting the protective layer of the cable, the outer surface presents two states: an arc surface and a torsional surface. The deformable driving wheel can correspond to the arc surface and the torsional surface respectively, ensuring the stability of the detection unit's movement on the outer surface of the cable.

[0039] 3. During the movement of the mounting frame, the scraper in contact with the outer surface of the cable can remove stains on the outer surface of the cable during use. When the image is captured by the acquisition device, the influence of the stains on the image capture can be eliminated to ensure the quality of image capture, and the state can be switched according to the curved surface or the torsion surface.

[0040] 4. When conducting tension testing, the position of the detection unit is positioned to ensure that the position of the detection unit is stable. When conducting tension testing on adjacent cables, when the connecting rod is not connected to the positioning ring, it will not affect the up and down movement of the detection unit, thus avoiding motion interference between each other.

[0041] Other features and advantages of the present invention will be described in the following description, and part of them will become obvious from the description, or will be understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the written description and the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 Schematic diagram of the detection unit of the present invention;

[0043] Figure 2 This is a schematic diagram of adjacent detection units connected via a tension unit according to the present invention;

[0044] Figure 3 This is a schematic diagram of the connection between the detection unit and the tension unit of the present invention;

[0045] Figure 4 A schematic diagram of the clamping ring and the guard plate of the present invention;

[0046] Figure 5 This is a schematic diagram of the internal structure of the mounting frame of the present invention;

[0047] Figure 6 Schematic diagram of the curved plate structure of the present invention;

[0048] Figure 7 Schematic diagram of the internal structure of the curved plate of the present invention Figure 1 ;

[0049] Figure 8 Schematic diagram of the internal structure of the curved plate of the present invention Figure 2 ;

[0050] Figure 9 is a schematic diagram of a drive assembly of the present invention;

[0051] Figure 10 A partial plan view of the drive assembly of the present invention;

[0052] Figure 11 is a sectional plan view of a driving wheel of the present invention;

[0053] Figure 12 It is a cross-sectional plan view showing the connection between the tension unit and the detection unit of the present invention;

[0054] Figure 13 It is a schematic diagram of the local structure of the present invention;

[0055] Figure 14 It is a cross-sectional view of the positioning ring of the present invention.

[0056] In the figure: 2 detection unit, 3 drive assembly, 4 adjustment assembly, 5 tension unit;

[0057] 21 mounting frame, 22 snap ring, 23 protrusion, 24 guard plate, 25 ring groove, 26 curved plate;

[0058] 31 driving wheel, 32 mounting shaft, 33 connecting shaft, 34 bevel gear, 35 driving motor, 36 elastic sheet, 37 expansion chamber, 38 connecting chamber, 39 electromagnet, 310 magnetic ring;

[0059] 41 clamping plate, 42 positioning piece, 43 scraper: 431 upper plate, 432 lower plate;

[0060] 51 positioning ring, 52 connecting frame, 53 connecting rod, 54 telescopic rod, 55 dynamometer, 56 positioning column, 57 hydraulic chamber, 58 magnetic pressure plate, 59 electromagnetic block, 510 connecting contact, 511 electromagnetic column. DETAILED DESCRIPTION

[0061] The following drawings illustrate various embodiments of the present invention. For clarity, many practical details are included in the following description. However, it should be understood that these practical details are not intended to limit the present invention. In other words, in some embodiments of the present invention, these practical details are optional. Furthermore, features from different embodiments may be interchangeably applicable, where practically possible.

[0062] Unless otherwise defined, all terms used herein (including technical and scientific terms) have their ordinary meanings as understood by those skilled in the art. Furthermore, the definitions of the aforementioned terms in commonly used dictionaries should be interpreted in the context of this specification as consistent with the meanings in the art relevant to the present invention. Unless otherwise explicitly defined, these terms should not be interpreted as having idealized or overly formal meanings.

[0063] The following explains the relationships and terms used in this application:

[0064] Parallel: The parallel defined in this application is not limited to absolute parallelism. This definition of parallelism can be understood as basic parallelism, allowing for situations where the two sides are not absolutely parallel due to factors such as assembly tolerance, design tolerance, and the influence of structural flatness. Small angle errors are allowed. For example, within an assembly error range of 10 degrees, it can be understood as a parallel relationship.

[0065] Vertical: The vertical defined in this application is not limited to an absolute vertical intersection relationship (angle of 90 degrees). It allows for non-absolute vertical intersection relationships caused by factors such as assembly tolerance, design tolerance, and structural flatness. It allows for errors in a small angle range. For example, the assembly error range of 80 to 100 degrees can be understood as a vertical relationship.

[0066] The above explanation does not fully include the relationship definitions given in this application, but only represents part of it.

[0067] The present invention provides a bridge condition detection device, which is installed on the outside of the cable and moves on the outside of the cable under the drive of power, driving the detection unit 2 to move along the cable, obtaining cable surface data, and determining the status of the cable based on the surface data.

[0068] See Figure 1-3 , some structures are in Figure 1-3 Not shown or blocked by components, as shown in subsequent figures, in one embodiment, the detection device includes at least one acquisition device for acquiring cable surface data, the acquisition device is arranged toward the cable axis, and the detection device consists of two parts. The first part is a detection unit 2 sleeved on the outside of the cable, and the acquisition device is installed inside the detection unit 2. The detection unit 2 is coaxially arranged with the steel cable. A drive component 3 is configured inside the detection unit 2. The drive component 3 is configured with two motion modes corresponding to the curved surface cable and the torsional surface cable. The drive component 3 changes the position of the detection unit 2 outside the cable;

[0069] The adjusting assembly 4 is connected to the driving assembly 3. The adjusting assembly 4 includes at least one scraper 43 that contacts the surface of the cable. When the detection unit 2 moves along the axial direction of the cable, the scraper 43 scrapes away stains on the surface of the cable.

[0070] The pumping assembly is installed inside the detection unit 2. The pumping unit extends to the bottom of the detection unit 2 and is equipped with a connector. The hose is connected to the connector for water supply. The pumping unit consists of a pump and a nozzle. The pump draws water through the hose to flush the cable surface.

[0071] The second part is the tension unit 5, which is installed inside the detection unit 2. Adjacent detection units 2 can be connected through the tension unit. When the tension unit is connected to the detection unit 2, it is used to determine the cable tension data.

[0072] In one feasible method, since the outer surface of the cable presents different shapes according to the different protective layers, when the plastic coating is provided on the outside of the steel rope, the outer surface of the cable is arc-shaped and the cable as a whole is columnar, and when the cable protective layer is anti-corrosion grease, the outer surface of the steel rope is a torsional surface. Therefore, the detection unit 2 is driven on the torsional surface in a manner that can drive the movement of the detection unit 2 under the arc surface. There are fewer contact points, and the detection stability of the detection unit 2 cannot be guaranteed.

[0073] Since the detection device corresponds to two cables with different outer surface shapes, when detecting the cables with corresponding outer surfaces, the detection unit 2 needs to be adjusted to different states to ensure the stability and safety of the detection unit 2 moving outside the cable.

[0074] The tension unit 5 is connected to the adjacent detection unit 2 when in use, so as to detect the tension state of two adjacent cables. By determining the tension data of the cables, the strength and toughness data of the cables can be obtained.

[0075] In conjunction with the positioning of surface flaws and defects in the cable, it can move to different positions to detect tension change data.

[0076] See Figure 3-4 As shown, in one embodiment, the detection unit 2 includes:

[0077] The mounting frame 21 is of split design. A snap ring 22 is provided on the outside of the mounting frame 21 for connecting and limiting the opening state of the mounting frame 21. A plurality of outwardly extending protrusions 23 are provided on the outside of the snap ring 22.

[0078] The guard plate 24 is mounted on the outside of the protrusion 23 and is in contact with the snap ring 22. The guard plate 24 is bendable, and the snap ring 22 is used to limit and support the guard plate 24. A plurality of positioning holes are provided on the end of the snap ring 22 away from the protrusion 23. The positioning holes are countersunk and are fixed to the outside of the mounting frame 21 by positioning pins or screws.

[0079] An annular groove 25 is provided within the mounting frame 21. An arcuate plate 26 is disposed within the annular groove 25. The arcuate plate 26 is mounted within the annular groove 25, and the drive assembly 3 is mounted within the arcuate plate 26. The data collection device is fixed to the inner wall of the arcuate plate 26. In another embodiment, the data collection device can also be mounted on the bottom of the mounting frame 21.

[0080] In one feasible method, the split design of the mounting frame 21 can facilitate the installation of the detection unit 2 on the outside of the cable. The mounting frame 21 is fixed and limited by the clamping ring 22, so that the mounting frame 21 can be quickly positioned and connected, and the position stability between the mounting frame 21 and the guard plate 24 is ensured. Furthermore, there is no need to carry special tools to fix the mounting frame 21.

[0081] Optionally, the snap ring 22 and the positioning pin are designed as an integral whole. The snap ring 22 is inserted into the interior of the mounting frame 21 through the positioning pin and is inserted into the interior of the guard plate 24 through the protrusion 23, thereby positioning the mounting frame 21 and the guard plate 24 and ensuring the positional stability of the mounting frame 21 and the guard plate 24.

[0082] In another embodiment, the retaining ring 22 is rigidly configured, and the guard plate 24 has a certain degree of elasticity. Therefore, the outer end of the protrusion 23 expands outward. When the guard plate 24 is installed on the protrusion 23, the outward expansion of one end of the protrusion 23 is utilized to further ensure the stability of the connection between the guard plate 24 and the protrusion 23.

[0083] See Figure 8-10 As shown, in one embodiment, the drive assembly 3 includes:

[0084] The driving wheel 31 contacts the cable and drives the detection unit 2 to move up and down along the outer surface of the cable by rotating. A mounting shaft 32 extending outward is provided in the middle of the driving wheel 31. The driving wheel 31 is fixed to the middle of the mounting shaft 32. A connecting shaft 33 is provided between adjacent mounting shafts 32. A bevel gear 34 is provided between the connecting shaft 33 and the mounting shaft 32 for meshing transmission.

[0085] The driving motor 35 is installed on the inner side of the arc-shaped plate 26 . The driving motor 35 is connected to the connecting shaft 33 and drives the connecting shaft 33 to rotate.

[0086] In one feasible method, the driving wheel 31 is elastically configured, and friction is generated between the surface of the driving wheel 31 and the outer surface of the cable. The friction generated between the rotation of the driving wheel 31 and the outer surface of the cable is used to change the height position of the detection unit 2, thereby realizing the detection of defects on the outer surface of the cable at different positions.

[0087] In another embodiment, a power supply module is provided on the outside of the arc plate 26. The power supply module can be detachably installed on the outside of the arc plate 26 and connected to the drive motor 35 to supply power to the drive motor 35. When the detection unit 2 moves to a high altitude position, the detection operation can also be completed.

[0088] See Figure 10-11 As shown, in one embodiment, an elastic sheet 36 is provided on the outside of the driving wheel 31 to expand and change the outer contour of the driving wheel 31. An expansion cavity 37 is formed between the elastic sheet 36 and the driving wheel 31. A connecting cavity 38 is formed in the middle of the driving wheel 31. The connecting cavity 38 is connected to the expansion cavity 37. When the expansion cavity 37 is in an expanded state, the elastic sheet 36 expands outward and fits the curved surface of the cable. When the expansion cavity 37 contracts, the elastic sheet 36 contacts the outer surface of the driving wheel 31 and fits the torsional surface of the cable.

[0089] The electromagnet 39 is fixed on the inner side of the arc plate 26 , and a magnetic ring 310 is provided in the middle of the driving wheel 31 . The electromagnet 39 and the magnetic ring 310 cooperate to change the squeezing state of the connecting cavity 38 , and the squeezing state of the connecting cavity 38 changes the expansion or contraction of the expansion cavity 37 .

[0090] In one feasible method, the outer side of the elastic sheet 36 is treated with anti-slip treatment to increase the friction between the elastic sheet 36 and the surface of the cable, so that when the driving wheel 31 rotates, the detection unit 2 can move on the outside of the cable. By utilizing the elastic sheet 36 with a changeable outer contour, the outer edge shape of the driving wheel 31 is changed according to the expansion state of the expansion chamber 37 to correspond to cables with different outer surfaces.

[0091] When the elastic sheet 36 is attached to the driving wheel 31, the driving wheel 31 can extend to the inner side of the torsion surface and contact the two torsion surfaces at the same time. When the driving wheel 31 rotates, it can contact a larger area of ​​the torsion surface, thereby ensuring stability during the driving process.

[0092] When the elastic sheet 36 is squeezed by the electromagnet 39 and the magnetic ring 310 on the connecting cavity 38, the expansion cavity 37 expands, causing the elastic sheet 36 to expand the outer wheel surface of the driving wheel 31, so that it has a larger contact area when fitting the curved surface, thereby ensuring stability during the driving process.

[0093] See Figure 7-9 As shown, in one embodiment, the adjustment component 4 includes:

[0094] A clamping plate 41 is fixed to the outside of the driving wheel 31. The clamping plate 41 passes through the curved plate 26 and extends to the back of the curved plate 26.

[0095] The positioning piece 42 is fixed to the inner side of the scraper 43 and supports the scraper 43. The end of the scraper 43 facing away from the positioning piece 42 is configured to be tooth-shaped;

[0096] The clamping plates 41 are connected to the positioning pieces 42 , and the distance between the clamping plates 41 is reduced to change the bending state of the scraper 43 .

[0097] In one feasible method, the scraper 43 is set to be tooth-shaped, and the teeth can be extended to the inside of the twisted surface, so that the teeth can be used to scrape off stains in the gaps of the twisted surface. When in use, the scraper 43 is supported by the positioning piece 42. Under the support of the positioning piece 42, the clamping plate 41 adjusts the spacing to change the state of the scraper 43.

[0098] Both ends of the scraper 43 extend to the inner side of the curved plate 26 and are restricted by the curved plate 26 .

[0099] See Figure 8-9As shown, in one embodiment, at least two groups of scrapers 43 are arranged inside the mounting frame 21, and the two groups of scrapers 43 are symmetrically arranged up and down, and each group of scrapers 43 includes an upper plate 431 and a lower plate 432. The upper plate 431 is arranged in an arc shape, and the lower plate 432 is pressed by the clamping plate 41 to fit the upper plate 431 in an arc shape. When the spacing between the clamping plates 41 becomes larger, the lower plate 432 is arranged in a straight line.

[0100] In one practicable manner, each group of scrapers 43 is provided with two, and is divided into an upper plate 431 and a lower plate 432. After the clamping plate 41 squeezes the positioning piece 42, the positioning piece 42 bends, so that the lower plate 432 fits against the upper plate 431, and both are in a bent state. The tooth groove positions of the upper plate 431 and the lower plate 432 complement each other. When the spacing between the clamping plates 41 becomes larger, the lower plate 432 is straight and the upper plate 431 is curved, so that the toothed section of the scraper 43 enters the recess of the torsion surface.

[0101] See Figure 5-6 as well as Figure 12 As shown, in one embodiment, the tension unit 5 includes:

[0102] A positioning ring 51 is installed inside the mounting frame 21, and the positioning ring 51 and the mounting frame 21 are coaxially arranged;

[0103] The connecting frame 52 is fixed to the outside of the mounting frame 21 by bolts. A connecting rod 53 is provided inside the connecting frame 52 and extends into the interior of the mounting frame 21. A telescopic rod 54 is provided at the end of the connecting rod 53 away from the positioning ring 51. The connecting rod 53 and the telescopic rod 54 are connected by a dynamometer 55.

[0104] One end of the connecting rod 53 extending toward the mounting bracket 21 is connected to the positioning ring 51 , and the telescopic rod 54 drives the connecting rod 53 to retract to detect the tension of the positioning ring 51 .

[0105] In one practicable manner, the positioning ring 51 is disposed inside the mounting frame 21 , the positioning ring 51 is pulled by the connecting rod 53 , and the tension change of the connecting rod 53 pulling the positioning ring 51 is obtained by a dynamometer 55 located on one side of the connecting rod 53 .

[0106] See Figure 12-14 As shown, in one embodiment, a plurality of retractable positioning posts 56 are provided inside the positioning ring 51, an annular hydraulic chamber 57 is provided inside the positioning ring 51, the positioning posts 56 extend into the interior of the hydraulic chamber 57, magnetic pressure plates 58 are provided above and below the hydraulic chamber 57, and an electromagnetic block 59 is provided outside the magnetic pressure plate 58. The electromagnetic block 59 and the pressure plate are spaced apart by magnetic force to control the flow of the medium inside the hydraulic chamber 57;

[0107] The connection contacts 510 are respectively provided on the outside of the positioning post 56 and at the end of the connecting rod 53 that contacts the positioning post 56 . The electromagnetic block 59 is powered through the connection contacts 510 .

[0108] In one practicable manner, the retractable positioning column 56 inside the positioning ring 51 is used to directly contact the cable. When the positioning ring 51 is pulled, the tension can be directly applied to the cable, and the extension and retraction of the telescopic rod 54 can determine the tension data based on the tension meter 55.

[0109] By providing the connection contacts 510 , the electromagnetic block 59 can be powered, so that the electromagnetic block 59 controls the position of the magnetic pressure plate 58 , thereby controlling the extension and retraction of the positioning post 56 .

[0110] See Figure 12-14 As shown, in one embodiment, an electromagnetic column 511 is provided at one end of the connecting rod 53 that contacts the positioning ring 51. When the electromagnetic column 511 is energized, it magnetically attracts the positioning ring 51.

[0111] The connection contact 510 of the positioning ring 51 is located at a downward position, and the connecting rod 53 is connected to the positioning ring 51 at the downward position.

[0112] In one practicable manner, a signal generator is provided inside the positioning ring 51. After the connecting rod 53 is connected to the positioning ring 51, the connecting contacts 510 are connected to each other, the signal generator generates a signal to confirm that the connecting rod 53 and the positioning ring 51 are stably connected, and the electromagnet 39 is energized.

[0113] The connecting rod 53 is in planar contact at the sunken position, and the positioning ring 51 is an arc surface. Therefore, in the sunken position, the connection between the connecting rod 53 and the positioning ring 51 is most stable, ensuring the connection stability of the connecting rod 53 and the positioning ring 51.

[0114] The present application also provides a bridge status detection method for use with the above-mentioned detection device, comprising the following steps:

[0115] Determine the size of the drive assembly 3 according to the cable to be tested, install the drive assembly 3 inside the mounting bracket 21, and connect the mounting bracket 21 to the cable;

[0116] Adjust the driving component 3 to a state corresponding to the outer surface of the cable through the adjusting component 4;

[0117] The scraper 43 contacts the cable surface, and the driving component 3 moves to generate friction with the cable surface, changing the position of the detection unit 2, and obtaining cable surface data through the acquisition device;

[0118] The adjacent detection units 2 are connected by using the tension unit 5 , and the tension data of the cable is measured by the tension unit 5 .

[0119] In summary, the technical solutions disclosed in the above embodiments of the present invention have at least the following advantages:

[0120] 1. This application is set up in two parts, the first part is the detection unit 2, and the second part is the tension unit. The detection unit 2 can be used alone to detect the cable, obtain image data of the outer surface of the cable, and determine whether there are defects on the outer surface of the cable based on the image data. The tension unit can be used to connect adjacent detection units 2 to perform tension detection on the cable.

[0121] 2. By setting a deformable driving wheel 31, it can correspond to different states of the outer surface of the cable during use. Due to the different means of setting the protective layer of the cable, the outer surface presents two states: an arc surface and a torsional surface. The deformable driving wheel 31 can correspond to the arc surface and the torsional surface respectively, thereby ensuring the stability of the detection unit 2 in the movement of the outer surface of the cable.

[0122] 3. During the movement of the mounting frame 21, the scraper 43 in contact with the outer surface of the cable can remove stains on the outer surface of the cable during use. When the image is captured by the acquisition device, the influence of the stains on the image capture can be eliminated to ensure the quality of the image capture, and the state can be switched according to the curved surface or the twisted surface.

[0123] 4. When performing tension testing, the position of the detection unit 2 is positioned to ensure that the position of the detection unit 2 is stable, and tension testing is performed on adjacent cables. When the connecting rod 53 is not connected to the positioning ring 51, it will not affect the up and down movement of the detection unit 2, avoiding mutual motion interference.

[0124] Although the present invention is disclosed in conjunction with the above embodiments, it is not intended to limit the present invention. Anyone familiar with this technology can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be based on the definition of the attached claims.

Claims

1. A bridge condition detection device, comprising at least one acquisition device for acquiring cable surface data, the acquisition device being arranged toward the cable axis, characterized in that: The detection device consists of two parts: The first part is a detection unit (2) sleeved on the outside of the cable. The detection unit (2) is coaxially arranged with the steel cable. The internal configuration of the detection unit (2) is as follows: A driving assembly (3) includes a driving wheel (31), an elastic sheet (36) is provided on the outside of the driving wheel (31) and is capable of expanding to change the outer contour of the driving wheel (31), an expansion cavity (37) is formed between the elastic sheet (36) and the driving wheel (31), and a connecting cavity (38) is formed in the middle of the driving wheel (31), and the connecting cavity (38) is connected to the expansion cavity (37); A magnetic ring (310) is provided in the middle of the driving wheel (31), and an electromagnet (39) is provided inside the detection unit (2). The electromagnet (39) cooperates with the magnetic ring (310) to change the squeezing state of the communication cavity (38). The squeezing state of the communication cavity (38) changes the expansion or contraction of the expansion cavity (37), so that the driving wheel (31) switches between the arc surface cable and the torsion surface cable. The driving wheel (31) contacts the cable and drives the detection unit (2) to move up and down along the outer surface of the cable by rotating. An adjusting assembly (4) is connected to the driving assembly (3), the adjusting assembly (4) comprising at least one scraper (43) contacting the surface of the cable, and the detecting unit (2) scrapes away stains on the surface of the cable through the scraper (43) when moving along the axial direction of the cable; The second part is a tension unit (5), which is installed inside the detection unit (2). Adjacent detection units (2) can be connected via the tension unit (5). When the tension unit (5) is connected to the detection unit (2), it is used to determine the cable tension data.

2. The bridge condition detection device according to claim 1, characterized in that: The detection unit (2) comprises: The mounting frame (21) is of split-type design, and a snap ring (22) is provided on the outside of the mounting frame (21) for connecting and limiting the opening state of the mounting frame (21), and a plurality of protrusions (23) extending outward are provided on the outside of the snap ring (22); A guard plate (24) is mounted on the outside of the protrusion (23) and is fitted with the snap ring (22). The guard plate (24) is bendable, and the snap ring (22) is used to limit and support the guard plate (24). A plurality of positioning holes are provided on one end of the snap ring (22) away from the protrusion (23). The positioning holes are countersunk holes. The snap ring (22) is fixed to the outside of the mounting frame (21) by positioning pins or screws. The annular groove (25) is arranged inside the mounting frame (21), the inner side of the annular groove (25) is provided with an arc plate (26), the arc plate (26) is installed inside the annular groove (25), and the driving assembly (3) is installed inside the arc plate (26).

3. The bridge condition detection device according to claim 2, characterized in that: The drive assembly (3) includes: A driving motor (35) is installed on the inner side of the arc-shaped plate (26), and the driving motor (35) is connected to the connecting shaft (33) and drives the connecting shaft (33) to rotate; A mounting shaft (32) extending outward is provided in the middle of the driving wheel (31), the driving wheel (31) is fixed to the middle of the mounting shaft (32), a connecting shaft (33) is provided between adjacent mounting shafts (32), and a bevel gear (34) is provided between the connecting shaft (33) and the mounting shaft (32) for meshing transmission.

4. The bridge condition detection device according to claim 3, characterized in that: When the expansion chamber (37) is in an expanded state, the elastic sheet (36) expands outward and fits the curved surface of the cable; when the expansion chamber (37) contracts, the elastic sheet (36) contacts the outer surface of the driving wheel (31) and fits the torsional surface of the cable.

5. The bridge condition detection device according to claim 4, characterized in that: The regulating component (4) comprises: A splint (41) is fixed to the outside of the driving wheel (31), and the splint (41) passes through the arc-shaped plate (26) and extends to the back of the arc-shaped plate (26); A positioning piece (42) is fixed to the inner side of the scraper (43) and supports the scraper (43), and one end of the scraper (43) facing away from the positioning piece (42) is configured to be tooth-shaped; The clamping plate (41) is connected to the positioning piece (42), and the spacing between the clamping plates (41) is reduced to change the bending state of the scraper (43).

6. The device for detecting bridge condition according to claim 5, characterized in that: At least two groups of scrapers (43) are provided inside the mounting frame (21). The two groups of scrapers (43) are symmetrically provided up and down. Each group of scrapers (43) includes an upper plate (431) and a lower plate (432). The upper plate (431) is provided in an arc shape. When the lower plate (432) is squeezed by the clamping plate (41), it fits the upper plate (431) in an arc shape. When the distance between the clamping plates (41) increases, the lower plate (432) is provided in a straight line shape.

7. The bridge condition detection device according to claim 6, characterized in that: The tension unit (5) comprises: A positioning ring (51) is installed inside the mounting frame (21), and the positioning ring (51) and the mounting frame (21) are coaxially arranged; A connecting frame (52) is fixedly mounted on the outside of the mounting frame (21) by means of bolts. A connecting rod (53) is provided inside the connecting frame (52) and extends toward the inside of the mounting frame (21). A telescopic rod (54) is provided at one end of the connecting rod (53) away from the positioning ring (51). The connecting rod (53) and the telescopic rod (54) are connected via a dynamometer (55). One end of the connecting rod (53) extending toward the mounting frame (21) is connected to the positioning ring (51), and the telescopic rod (54) drives the connecting rod (53) to retract to detect the tension of the positioning ring (51).

8. The device for detecting bridge condition according to claim 7, characterized in that: A plurality of retractable positioning posts (56) are provided on the inner side of the positioning ring (51), an annular hydraulic cavity (57) is provided on the inner side of the positioning ring (51), the positioning posts (56) extend into the interior of the hydraulic cavity (57), magnetic pressure plates (58) are provided above and below the hydraulic cavity (57), an electromagnetic block (59) is provided on the outer side of the magnetic pressure plate (58), and the electromagnetic block (59) and the pressure plate are spaced apart by magnetic force to control the flow of the medium inside the hydraulic cavity (57); The connecting contacts (510) are respectively arranged on the outside of the positioning column (56) and at one end of the connecting rod (53) in contact with the positioning column (56), and power is supplied to the electromagnetic block (59) through the connecting contacts (510).

9. The bridge condition detection device according to claim 8, characterized in that: An electromagnetic column (511) is provided at one end of the connecting rod (53) that contacts the positioning ring (51), and the electromagnetic column (511) magnetically attracts the positioning ring (51) when energized; The connection contact (510) of the positioning ring (51) is located at a downward position, and the connecting rod (53) is connected to the positioning ring (51) at the downward position.

10. A bridge condition detection method, used in the detection device according to any one of claims 1 to 9, characterized in that: The following steps are involved: Determine the size of the drive assembly (3) according to the cable to be tested, install the drive assembly (3) inside the mounting frame (21), and connect the mounting frame (21) to the cable; Adjusting the driving component (3) to a state corresponding to the outer surface of the cable through the adjusting component (4); The scraper (43) contacts the cable surface, the driving component (3) moves to generate friction with the cable surface, changes the position of the detection unit (2), and obtains cable surface data through the acquisition device; The adjacent detection units (2) are connected by using the tension unit (5), and the tension data of the cable is measured by the tension unit (5).

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