A local corrosion monitoring device for steel bars based on concrete structure

Abstract

The present invention discloses a local corrosion monitoring device for steel bars based on a concrete structure, which belongs to the technical field of corrosion detection. The device comprises a base, an optical fiber line inserted between a positioning plate and a cylindrical guide tube, an adjusting member is installed on the fixing plate, the adjusting member comprises an adjusting screw, a spring sheet and a supporting plate are installed on the adjusting screw, and another optical fiber line is inserted between the positioning plate and the supporting plate, and the concrete casting is attached to the bottom of the other end of the movable plate. The present invention has the advantages of being convenient for fixing and limiting optical fiber lines of different sizes, effectively ensuring the stable connection between the optical fiber line and the fixing plate and the movable plate, having high flexibility and a wide range of applications, so that the optical fiber line is more gentle when being bent under force, which is beneficial to avoiding the phenomenon of wear and breakage caused by excessive force, reducing the loss of the optical fiber line, thereby facilitating the extension of the service life of the optical fiber line and improving the technical effect of monitoring efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of corrosion detection, and in particular relates to a local corrosion monitoring device for steel bars based on a concrete structure. Background Art

[0002] The corrosion of steel bars in reinforced concrete is one of the main factors affecting the durability of the structure. Real-time corrosion monitoring is conducive to better evaluating the corrosion state, obtaining corrosion information of the building structure, and achieving effective early warning while reducing unnecessary inspections and maintenance, which is conducive to cost savings. However, most of the existing corrosion monitoring sensors based on optical design have a small monitoring range or low monitoring sensitivity. The corrosion monitoring sensors based on electrical design have poor anti-interference ability or can only monitor uniform corrosion. Fiber Bragg grating sensors have high measurement sensitivity and can capture the generation of small cracks. They are also light in weight, strong in anti-interference ability, and corrosion-resistant, which is conducive to local corrosion monitoring. They can be used in a variety of complex environments to monitor the corrosion state of steel bars in concrete in a long-term, real-time, reliable and accurate manner.

[0003] To this end, the Chinese invention patent with announcement number CN113959935B discloses a steel bar corrosion monitoring device in reinforced concrete components, including a cover-type base, a sensor contact, two fiber Bragg gratings symmetrically bonded to the center positions on both sides of the spring, a spring, a wedge-shaped fixing nut, a spring fixing pressure plate, and a concrete casting. At the same time, through temperature compensation between the two gratings, the device converts the thickness changes transmitted by the concrete casting and the steel bar into changes in the central wavelength of the sensor grating through the cooperation of the sensor contact and the spring, and performs corrosion monitoring by analyzing the relationship between the changes in the thickness of the casting and the steel bar and the changes in the central wavelength of the sensor grating. Not only can the cracking degree of the concrete casting be monitored, but the cracks in the steel bar structure in the early stage of corrosion can also be captured in real time by the sensor contact, reducing the cost of the process.

[0004] However, the above device directly bonds the optical fiber to the shrapnel. During long-term monitoring, the bonding is prone to become loose, especially for the optical fiber under the shrapnel, which can easily affect the sensitivity of the optical fiber and thus the accuracy of monitoring. At the same time, when the shrapnel drives the optical fiber to bear force, if the volume of the corrosion product is too large, the optical fiber can be easily bent to the fixed pressure plate, which can easily cause wear to the optical fiber and affect its service life. Summary of the invention

[0005] In view of the problems existing in the prior art, the present invention provides a local corrosion monitoring device for steel bars based on a concrete structure, which is convenient for fixing and limiting optical fibers of different sizes, effectively ensuring a stable connection between the optical fiber and the fixed plate and the movable plate, has high flexibility and a wide range of applications, and makes the optical fiber bend more gently when subjected to force, which is beneficial to avoiding wear and breakage caused by excessive force, and reducing the loss of the optical fiber, thereby facilitating extending the service life of the optical fiber and improving the monitoring efficiency. It solves the problem in the prior art that in long-term monitoring work, the bonding joints are prone to become loose, especially the optical fiber under the shrapnel, which is easy to affect the sensitivity of the optical fiber and then affect the monitoring accuracy. At the same time, when the shrapnel drives the optical fiber to be subjected to force, if the volume of the corrosion product is too large, it is easy for the optical fiber to be bent to the fixed pressure plate under force, which is easy to cause wear to the optical fiber and affect its service life.

[0006] The present invention is achieved in this way. A local corrosion monitoring device for steel bars based on a concrete structure comprises a base, a steel bar to be tested is penetrated at the lower part of the base, an optical fiber line is penetrated at the upper part of the base, a fixing seat is fixedly connected to the inner wall of one side of the base, a fixing plate is fixedly connected to the fixing seat, a support rod is fixedly connected between the inner walls of the end parts of the fixing plate, a positioning member is installed in the middle of the support rod, the positioning member comprises a positioning plate and a telescopic plate, a cylindrical guide cylinder is slidably connected between the tops of the telescopic plates, a movable sheet is slidably penetrated between the two ends of the support rod, one of the optical fiber lines is penetrated between the positioning plate and the cylindrical guide cylinder, an adjusting member is installed on the fixing plate, the adjusting member comprises an adjusting screw, a spring sheet and a supporting plate are installed on the adjusting screw, the other optical fiber line is penetrated between the positioning plate and the supporting plate, the spring sheet is attached to the top of one end of the movable sheet, a concrete casting is embedded in the other side of the base, and the concrete casting is attached to the bottom of the other end of the movable sheet.

[0007] By adopting the above scheme, through the cooperation of the positioning parts and the adjusting parts, the positioning plate, telescopic plate, cylindrical guide tube and supporting plate are convenient for fixing and limiting optical fiber lines of different sizes, effectively ensuring the stable connection between the optical fiber line and the fixed plate and the movable plate, with high flexibility and wide application range. Moreover, through the cylindrical guide tube and the support rod, the optical fiber line can be bent more gently when subjected to force, which is beneficial to avoid wear and breakage caused by excessive force, reduce the loss of the optical fiber line, and thus help to extend the service life of the optical fiber line and improve the monitoring efficiency. The spring piece allows the movable plate and the concrete casting to maintain a close fit to ensure the monitoring quality, and the spring piece is easy to replace, making the sensitivity adjustable and flexible to use.

[0008] As a preferred embodiment of the present invention, a fixing plate is clamped on the fixing sheet, and the fixing plate, the fixing sheet and the fixing seat are fixedly connected by bolts. A receiving hole is provided in the middle of the fixing plate, and the optical fiber line is passed through the receiving hole. Two optical fiber lines are provided and are attached to the upper and lower surfaces of the fixing sheet.

[0009] The above solution is convenient for installation and fixation of the fixing plate, easy to use, and ensures stable connection between the optical fiber line and the fixing plate. The dual optical fiber line eliminates the influence of temperature through differential compensation, which is convenient for corrosion monitoring.

[0010] As a preferred embodiment of the present invention, a support plate is fixedly connected to the inner wall of the movable sheet, a rubber block is sleeved and fixed on the inner end of the optical fiber line, the rubber block is fixedly connected to the support plate by bolts, a plurality of marking ring lines are drawn on the support plate, and the optical fiber line is fitted on the corresponding marking ring lines.

[0011] By adopting the above scheme, the stability of the connection structure between the optical fiber line and the movable plate is effectively improved by the support plate and the rubber block, and the optical fiber lines of different sizes are aligned with the marking ring lines of corresponding sizes, which makes it easy to install the optical fiber lines of different sizes stably and has high flexibility in use.

[0012] As a preferred embodiment of the present invention, a rubber tube is fixedly sleeved on the middle part of the support rod, two positioning plates are provided and are located on both sides of the rubber tube, the positioning plate is threadedly sleeved on the support rod, a rubber pad is fixedly connected to the inner side of the positioning plate, the optical fiber line is tightly fitted between the rubber tube and the rubber pad, and the telescopic plate is movably sleeved on the support rod and is located on the outer side of the positioning plate.

[0013] By adopting the above scheme, the positioning plate is rotated to move along the support rod, which is convenient for limiting and fixing optical fiber lines of different sizes. The rubber tube and rubber pad can prevent wear on the optical fiber line, and the protective performance is good and the support stability is high, so as to realize effective protection of the optical fiber line. When the positioning plate moves, it is convenient to push the two telescopic plates to the appropriate position.

[0014] As a preferred embodiment of the present invention, a telescopic rod is fixedly connected to the inner side of the top of the telescopic plate, the end of the telescopic rod slides through the interior of the cylindrical guide tube and is fixedly connected to a slide plate, the slide plate slides along the inner wall of the cylindrical guide tube, and an anti-slip rubber layer is fixedly connected to the interior of the telescopic plate, and the anti-slip rubber layer is sleeved on the support rod.

[0015] By adopting the above scheme, when the positioning plate moves, the telescopic plate also moves horizontally left and right accordingly, and then the slide plate is pulled by the telescopic rod to slide along the cylindrical guide tube. At the same time, the telescopic plate is pulled up and down to move vertically, and then the height of the cylindrical guide tube is adjusted, so that it is convenient to clamp and fix optical fiber lines of different sizes. The anti-slip rubber layer is helpful to increase the friction between the telescopic plate and the support rod, thereby achieving stable support for the cylindrical guide tube.

[0016] As a preferred embodiment of the present invention, evenly distributed limiting holes are opened in the middle of the anti-slip rubber layer, and the support rods are tightly inserted into the limiting holes.

[0017] By adopting the above solution, when the telescopic plate is pulled to adjust the height position of the cylindrical guide tube, the support rod will be inserted into the corresponding limit hole, thereby effectively limiting the moving position, which is conducive to ensuring the stability of the telescopic plate support.

[0018] As a preferred embodiment of the present invention, a handle is fixedly connected to the top of the adjusting screw, the supporting plate is connected to the bottom of the adjusting screw through a bearing, a mounting groove is provided on the top of the fixing seat, the other optical fiber line is inserted into the mounting groove, a guide groove is provided on the groove wall of the mounting groove, and guide blocks are fixedly connected to both ends of the supporting plate, and the guide blocks slide along the guide grooves.

[0019] By adopting the above solution, the support plate can be driven to move up and down by holding the handle and rotating the adjusting screw, so that the support plate can stably support and limit optical fiber lines of different sizes, making the installation of the optical fiber line 10 highly stable.

[0020] As a preferred embodiment of the present invention, one end of the spring sheet is movably sleeved on the adjusting screw, a fastening plate is threadedly connected to the adjusting screw, the fastening plate is pressed against the spring sheet, and the other end of the spring sheet is tightly fitted on the movable sheet.

[0021] By adopting the above scheme, the movable plate and the sensing contact of the concrete casting can maintain a close fit through the spring piece to ensure the monitoring quality, and the spring piece is arranged on the adjusting screw for easy replacement, so that the sensitivity is adjustable and flexible to use, and the fastening plate is convenient for fixing it and easy to use.

[0022] As a preferred embodiment of the present invention, a sensing contact is embedded and fixed on the top of the concrete casting, the sensing contact is tightly fitted with the movable sheet, and a cover plate is clamped on the top of the base.

[0023] By adopting the above scheme, the cover plate is convenient for opening the interior of the base to install the internal device, and it is easy to use. When the steel bar to be tested is corroded, the volume of the corrosion product is larger than the volume of the original steel bar, which will cause the volume of the steel bar to expand. The expansion of the volume will push the concrete casting, so that the sensor contact pushes the movable plate to move, that is, the optical fiber line is deformed by force, so that the central wavelength of the fiber grating changes, thereby monitoring the corrosion of the steel bar to be tested.

[0024] Compared with the prior art, the beneficial effects of the present invention are as follows: through the cooperation of the positioning part and the adjusting part, the positioning plate, the telescopic plate, the cylindrical guide tube and the supporting plate are convenient for fixing and limiting optical fiber lines of different sizes, effectively ensuring the stable connection between the optical fiber line and the fixed plate and the movable plate, with high flexibility and a wide range of applications. Moreover, through the cylindrical guide tube and the support rod, the optical fiber line can be bent more gently when subjected to force, which is beneficial to avoid wear and breakage caused by excessive force, and reduce the loss of the optical fiber line, thereby helping to extend the service life of the optical fiber line, with good protective effect and improved monitoring efficiency. Through the spring sheet, the movable plate and the concrete casting sensor contacts can maintain a close fit to ensure the monitoring quality, and it is convenient to replace spring sheets of different thicknesses, so that the sensitivity is adjustable and flexible to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure provided by an embodiment of the present invention;

[0026] Figure 2 It is a partial structural schematic diagram provided by an embodiment of the present invention;

[0027] Figure 3 is a schematic diagram of the bottom structure of the movable sheet provided by an embodiment of the present invention;

[0028] Figure 4 is a schematic diagram of the top structure of the movable sheet provided by an embodiment of the present invention;

[0029] Figure 5 is a schematic diagram of a side cross-sectional structure of a fixing seat provided by an embodiment of the present invention;

[0030] Figure 6 is a schematic diagram of the structure of the adjusting screw provided by an embodiment of the present invention;

[0031] Figure 7 It is a schematic diagram of the structure of a cylindrical guide tube provided by an embodiment of the present invention;

[0032] Figure 8 Schematic diagram of the cross-sectional structure of a cylindrical guide tube provided by an embodiment of the present invention;

[0033] Fig. 9 It is a schematic diagram of the telescopic plate structure provided by an embodiment of the present invention.

[0034] In the figure: 1, base; 101, cover plate; 2, steel bar to be tested; 3, concrete casting; 301, sensor contact; 4, fixing seat; 401, mounting groove; 402, guide groove; 5, fixing plate; 501, accommodating hole; 6, movable sheet; 601, fixing sheet; 602, supporting plate; 603, marking ring line; 7, supporting rod; 701, positioning plate; 702, rubber pad; 703, rubber tube; 8, adjusting screw; 801, spring piece; 802, fastening plate; 803, handle; 804, supporting plate; 805, guide block; 9, cylindrical guide tube; 901, telescopic plate; 902, anti-slip rubber layer; 903, limit hole; 904, telescopic rod; 905, slide plate; 10, optical fiber line; 11, rubber block. DETAILED DESCRIPTION

[0035] In order to further understand the content, features and effects of the present invention, the following embodiments are given as examples and described in detail with reference to the accompanying drawings.

[0036] The structure of the present invention is described in detail below in conjunction with the accompanying drawings.

[0037] refer to Figures 1 to 9 As shown, a local corrosion monitoring device for steel bars based on a concrete structure provided by an embodiment of the present invention comprises a base 1, a steel bar 2 to be tested is penetrated at the lower part of the base 1, an optical fiber line 10 is penetrated at the upper part of the base 1, a fixing seat 4 is fixedly connected to the inner wall of one side of the base 1, a fixing plate 601 is fixedly connected to the fixing seat 4, a support rod 7 is fixedly connected between the inner walls of the ends of the fixing plate 601, a positioning member is installed in the middle of the support rod 7, the positioning member comprises a positioning plate 701 and a telescopic plate 901, and a cylindrical A movable sheet 6 is slidably inserted between the two ends of the support rod 7, one optical fiber line 10 is inserted between the positioning plate 701 and the cylindrical guide cylinder 9, an adjusting member is installed on the fixed plate 601, and the adjusting member includes an adjusting screw 8, and a spring piece 801 and a supporting plate 804 are installed on the adjusting screw 8, and the other optical fiber line 10 is inserted between the positioning plate 701 and the supporting plate 804, and the spring piece 801 is attached to the top of one end of the movable sheet 6, and a concrete casting 3 is embedded inside the other side of the base 1, and the concrete casting 3 is attached to the bottom of the other end of the movable sheet 6.

[0038] By adopting the above scheme, through the cooperation of the positioning parts and the adjusting parts, the positioning plate 701, the telescopic plate 901, the cylindrical guide tube 9 and the supporting plate 804 are convenient for fixing and limiting the optical fiber lines 10 of different sizes, effectively ensuring the stable connection between the optical fiber line 10 and the fixed plate 601 and the movable plate 6, with high flexibility and wide application range. Moreover, through the cylindrical guide tube 9 and the support rod 7, the optical fiber line 10 can be bent more gently when subjected to force, which is beneficial to avoid wear and breakage caused by excessive force, reduce the loss of the optical fiber line 10, and thus help to extend the service life of the optical fiber line 10 and improve the monitoring efficiency. The spring piece 801 allows the movable plate 6 and the concrete casting 3 to maintain a close fit to ensure the monitoring quality. The spring piece 801 is easy to replace, making the sensitivity adjustable and flexible to use.

[0039] Specifically, a fixing plate 5 is clamped on the fixing plate 601, and the fixing plate 5, the fixing plate 601 and the fixing seat 4 are fixedly connected by bolts. A receiving hole 501 is provided in the middle of the fixing plate 5, and the optical fiber line 10 is passed through the receiving hole 501. Two optical fiber lines 10 are provided and are attached to the upper and lower surfaces of the fixing plate 601.

[0040] The above solution facilitates the installation and fixation of the fixing plate 601, is easy to use, and ensures the stable connection between the optical fiber line 10 and the fixing plate 601. The dual optical fiber line 10 eliminates the influence of temperature through differential compensation, which facilitates corrosion monitoring.

[0041] Specifically, a support plate 602 is fixedly connected to the inner wall of the movable sheet 6, a rubber block 11 is sleeved and fixed on the inner end of the optical fiber line 10, and the rubber block 11 is fixedly connected to the support plate 602 by bolts. A plurality of marking ring lines 603 are drawn on the support plate 602, and the optical fiber line 10 is attached to the corresponding marking ring lines 603.

[0042] By adopting the above scheme, the stability of the connection structure between the optical fiber line 10 and the movable sheet 6 is effectively improved through the support plate 602 and the rubber block 11, and the optical fiber lines 10 of different sizes are aligned with the marking ring lines 603 of corresponding sizes, which facilitates the stable installation of the optical fiber lines 10 of different sizes and has high flexibility in use.

[0043] Specifically, a rubber tube 703 is fixedly sleeved on the middle part of the support rod 7, two positioning plates 701 are provided and are located on both sides of the rubber tube 703, the positioning plate 701 is threadedly sleeved on the support rod 7, a rubber pad 702 is fixedly connected on the inner side of the positioning plate 701, the optical fiber line 10 is tightly fitted between the rubber tube 703 and the rubber pad 702, and the telescopic plate 901 is movably sleeved on the support rod 7 and is located on the outer side of the positioning plate 701.

[0044] By adopting the above scheme, the positioning plate 701 is rotated to move along the support rod 7, which is convenient for limiting and fixing optical fiber lines 10 of different sizes. The rubber tube 703 and the rubber pad 702 avoid wear on the optical fiber line 10, and have good protection and high support stability, thereby achieving effective protection of the optical fiber line 10. When the positioning plate 701 moves, it is convenient to push the two telescopic plates 901 to the appropriate position.

[0045] Specifically, a telescopic rod 904 is fixedly connected to the inner side of the top of the telescopic plate 901, and the end of the telescopic rod 904 slides into the interior of the cylindrical guide tube 9 and is fixedly connected to a slide plate 905. The slide plate 905 slides along the inner wall of the cylindrical guide tube 9, and an anti-slip rubber layer 902 is fixedly connected to the interior of the telescopic plate 901, and the anti-slip rubber layer 902 is sleeved on the support rod 7.

[0046] By adopting the above scheme, when the positioning plate 701 moves, the telescopic plate 901 also moves horizontally left and right accordingly, and then the slide plate 905 is pulled by the telescopic rod 904 to slide along the cylindrical guide tube 9. At the same time, the telescopic plate 901 is pulled vertically up and down, and then the height of the cylindrical guide tube 9 is adjusted, so as to facilitate the clamping and fixing of optical fiber lines 10 of different sizes. The anti-slip rubber layer 902 is helpful to increase the friction between the telescopic plate 901 and the support rod 7, thereby achieving stable support for the cylindrical guide tube 9.

[0047] Specifically, evenly distributed limiting holes 903 are opened in the middle of the anti-slip rubber layer 902 , and the support rod 7 is tightly inserted into the limiting hole 903 .

[0048] By adopting the above solution, when the telescopic plate 901 is pulled to adjust the height position of the cylindrical guide tube 9, the support rod 7 will be inserted into the corresponding limiting hole 903, thereby effectively limiting the moving position, which is conducive to ensuring the stability of the support of the telescopic plate 901.

[0049] Specifically, a handle 803 is fixedly connected to the top of the adjusting screw 8, and the supporting plate 804 is connected to the bottom of the adjusting screw 8 through a bearing. A mounting groove 401 is provided on the top of the fixing seat 4, and the other optical fiber line 10 is inserted into the mounting groove 401. A guide groove 402 is provided on the groove wall of the mounting groove 401. Guide blocks 805 are fixedly connected to both ends of the supporting plate 804, and the guide blocks 805 slide along the guide groove 402.

[0050] By adopting the above solution, holding the handle 803 and rotating the adjusting screw 8 can drive the supporting plate 804 to move up and down, thereby facilitating the supporting plate 804 to stably support and limit the optical fiber lines 10 of different sizes, so that the optical fiber lines 10 are installed stably.

[0051] Specifically, one end of the spring piece 801 is movably sleeved on the adjusting screw 8, and a fastening plate 802 is threadedly connected to the adjusting screw 8. The fastening plate 802 is pressed against the spring piece 801, and the other end of the spring piece 801 is tightly fitted on the movable piece 6.

[0052] By adopting the above scheme, the movable sheet 6 and the sensing contact 301 of the concrete casting 3 can maintain a close fit through the spring piece 801 to ensure the monitoring quality, and the spring piece 801 is inserted into the adjusting screw 8 for easy replacement, so that the sensitivity is adjustable and flexible to use, and the fastening plate 802 is convenient for fixing it and is easy to use.

[0053] Specifically, a sensing contact 301 is embedded and fixed on the top of the concrete casting 3 , and the sensing contact 301 is tightly fitted with the movable sheet 6 . A cover plate 101 is clamped on the top of the base 1 .

[0054] By adopting the above scheme, the cover plate 101 is convenient for opening the interior of the base 1 to facilitate the installation of internal devices, and is easy to use. When the steel bar 2 to be tested is corroded, the volume of the corrosion product is larger than the volume of the original steel bar, which will cause the volume of the steel bar to expand. The expansion of the volume will push the concrete casting 3, so that the sensor contact 301 pushes the movable sheet 6 to move, that is, drives the optical fiber line 10 to deform under force, so as to cause the central wavelength of the fiber grating to change, thereby monitoring the corrosion of the steel bar 2 to be tested.

[0055] Working principle of the present invention:

[0056] When in use, the base 1 can be directly cast on the surface of the structure to be tested using a mold and concrete as needed. During installation, the two optical fiber lines 10 are inserted into the upper and lower surfaces of the fixing plate 601, and are fixed with bolts at the corresponding positions of the support plate 602. The positioning plates 701 are then rotated to move closer to each other to position and clamp the optical fiber lines 10, and the telescopic plate 901 is driven to move horizontally. The telescopic plate 901 is pulled upward so that the support rod 7 is inserted into the corresponding limiting hole 903, so that the height position of the cylindrical guide tube 9 can be adjusted, and optical fiber lines 10 of different sizes can be limited and fixed. In addition, the adjusting screw 8 is rotated to drive the supporting plate 804 to move to firmly support the optical fiber line 10 below, so that the optical fiber line 10 is firmly installed. Then, a spring piece 801 of appropriate thickness is selected to be inserted into the adjusting screw 8 and the fastening plate 802 is rotated so that the spring piece 801 The sheet 801 is pressed tightly on the movable sheet 6, and the cover plate 101 is installed after completion. The steel bars cast with this monitoring device can be directly used for construction. When the steel bar 2 to be tested is corroded, the volume of the corrosion product is larger than the volume of the original steel bar, which will cause the volume of the steel bar to expand. The expansion of the volume will push the concrete casting 3, so that the sensor contact 301 pushes the movable sheet 6 to move, that is, drives the optical fiber line 10 to deform under force, so as to cause the central wavelength of the fiber grating to change, so as to monitor the corrosion of the steel bar 2 to be tested. When the optical fiber line 10 is under force, it is supported and guided by the cylindrical guide tube 9 and the support rod 7, so that the bending under force is smoother, which is conducive to avoiding wear and breakage caused by excessive force, reducing the loss of the optical fiber line 10, and having a good protective effect, which is conducive to extending the service life of the optical fiber line 10 and improving the monitoring efficiency.

[0057] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0058] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A local corrosion monitoring device for steel bars based on a concrete structure, comprising a base (1), Features: The lower part of the base (1) is penetrated by a steel bar to be tested (2), the upper part of the base (1) is penetrated by an optical fiber line (10), a fixing seat (4) is fixedly connected to the inner wall of one side of the base (1), a fixing plate (601) is fixedly connected to the fixing seat (4), a support rod (7) is fixedly connected between the inner walls of the ends of the fixing plate (601), a positioning member is installed in the middle of the support rod (7), the positioning member comprises a positioning plate (701) and a telescopic plate (901), a cylindrical guide tube (9) is slidably connected between the tops of the telescopic plates (901), and a movable guide tube (9) is slidably penetrated between the two ends of the support rod (7). The movable plate (6) comprises a plate (6), one optical fiber line (10) is passed through between the positioning plate (701) and the cylindrical guide tube (9), an adjusting member is installed on the fixing plate (601), the adjusting member comprises an adjusting screw (8), a spring sheet (801) and a supporting plate (804) are installed on the adjusting screw (8), the other optical fiber line (10) is passed through between the positioning plate (701) and the supporting plate (804), the spring sheet (801) is attached to the top of one end of the movable plate (6), and a concrete casting (3) is embedded in the other side of the base (1), and the concrete casting (3) is attached to the bottom of the other end of the movable plate (6).

2. A local corrosion monitoring device for steel bars based on a concrete structure as claimed in claim 1, Features: A fixing plate (5) is clamped onto the fixing plate (601); the fixing plate (5), the fixing plate (601) and the fixing seat (4) are fixedly connected by bolts; a receiving hole (501) is provided in the middle of the fixing plate (5); the optical fiber line (10) is passed through the receiving hole (501); two optical fiber lines (10) are provided and are attached to the upper and lower surfaces of the fixing plate (601).

3. A local corrosion monitoring device for steel bars based on concrete structure as claimed in claim 1, Features: A support plate (602) is fixedly connected to the inner wall of the movable sheet (6); a rubber block (11) is sleeved and fixedly connected to the inner end of the optical fiber line (10); the rubber block (11) is fixedly connected to the support plate (602) by bolts; a plurality of marking loops (603) are drawn on the support plate (602); and the optical fiber line (10) is attached to the corresponding marking loops (603).

4. A local corrosion monitoring device for steel bars based on concrete structure as claimed in claim 1, Features: A rubber tube (703) is sleeved and fixed in the middle of the support rod (7), two positioning plates (701) are provided and are located on both sides of the rubber tube (703), the positioning plate (701) is threadedly sleeved on the support rod (7), a rubber pad (702) is fixedly connected on the inner side of the positioning plate (701), the optical fiber line (10) is tightly fitted between the rubber tube (703) and the rubber pad (702), and the telescopic plate (901) is movably sleeved on the support rod (7) and is located on the outer side of the positioning plate (701).

5. A local corrosion monitoring device for steel bars based on concrete structure as claimed in claim 1, Features: A telescopic rod (904) is fixedly connected to the inner side of the top of the telescopic plate (901); the end of the telescopic rod (904) slides through the interior of the cylindrical guide tube (9) and is fixedly connected to a slide plate (905); the slide plate (905) slides along the inner wall of the cylindrical guide tube (9); an anti-skid rubber layer (902) is fixedly connected to the interior of the telescopic plate (901); and the anti-skid rubber layer (902) is sleeved on the support rod (7).

6. A local corrosion monitoring device for steel bars based on a concrete structure as claimed in claim 5, Features: The middle of the anti-slip rubber layer (902) is provided with evenly distributed limiting holes (903), and the support rod (7) is tightly inserted into the limiting hole (903).

7. A local corrosion monitoring device for steel bars based on a concrete structure as claimed in claim 1, Features: The top of the adjusting screw (8) is fixedly connected to a handle (803); the supporting plate (804) is connected to the bottom of the adjusting screw (8) via a bearing; the top of the fixing seat (4) is provided with a mounting groove (401); the other optical fiber line (10) is inserted into the mounting groove (401); a guide groove (402) is provided on the groove wall of the mounting groove (401); guide blocks (805) are fixedly connected to both ends of the supporting plate (804); and the guide blocks (805) slide along the guide groove (402).

8. A local corrosion monitoring device for steel bars based on a concrete structure as claimed in claim 1, Features: One end of the spring sheet (801) is movably sleeved on the adjusting screw (8), a fastening plate (802) is threadedly connected to the adjusting screw (8), the fastening plate (802) is tightly pressed against the spring sheet (801), and the other end of the spring sheet (801) is tightly fitted on the movable sheet (6).

9. A local corrosion monitoring device for steel bars based on a concrete structure as claimed in claim 1, Features: A sensing contact (301) is embedded and fixed on the top of the concrete casting (3), the sensing contact (301) is tightly fitted with the movable sheet (6), and a cover plate (101) is clamped on the top of the base (1).

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