Electromagnetic induction type concrete tower steel bar corrosion nondestructive testing device and method

Abstract

The invention relates to an electromagnetic induction type concrete pole and tower steel bar corrosion nondestructive testing device and method, and solves the problems that the overall higher concrete pole is difficult to detect, and when electromagnetic corrosion nondestructive testing is carried out on steel bars in the concrete pole, the detection device needs to be manually pushed to move, so that the detection efficiency is high. And the operation of the whole monitoring process is tedious. Comprising a concrete pole, and the outer side of the concrete pole is provided with a self-lifting electromagnetic concrete pole tower steel bar corrosion detection device. The self-lifting type electromagnetic concrete tower steel bar corrosion detection device can automatically drive the whole equipment to move up and down along a concrete tower, and meanwhile, the wireless concrete steel bar corrosion instrument for carrying out detection operation can be automatically driven to move in parallel through the interior of the self-moving type electromagnetic concrete steel bar corrosion instrument; through the technical scheme, the automation degree of the equipment is improved, and the equipment is more convenient and faster to use.

Description

Technical Field

[0001] This invention relates to the field of rebar detection technology, specifically to an electromagnetic induction-based non-destructive testing device and method for detecting corrosion of rebar in concrete towers. Background Technology

[0002] The electromagnetic induction type non-destructive testing device for steel reinforcement corrosion of concrete towers is a device based on the principle of electromagnetic induction used to detect the corrosion of steel reinforcement inside concrete towers.

[0003] Its main principle is to use a magnetic field excitation source to emit a pulsed magnetic field. When the alternating magnetic field encounters a metal conductor, it will induce eddy currents in the conductor, thereby changing the equivalent impedance value of the induction coil. The corrosion of the steel bar can be judged by measuring the change in this impedance value.

[0004] However, when using this equipment, it is difficult to inspect tall concrete poles, and when performing electromagnetic corrosion non-destructive testing on the reinforcing bars inside the concrete poles, the testing device needs to be manually moved, making the overall monitoring process cumbersome. Therefore, it does not meet the current needs. To address this, we propose an electromagnetic induction-based non-destructive testing device and method for reinforcing bar corrosion of concrete poles. Summary of the Invention

[0005] The purpose of this invention is to provide an electromagnetic induction-based non-destructive testing device and method for steel reinforcement corrosion of concrete poles, in order to solve the problems mentioned in the background art, such as the difficulty in using these devices to perform testing on relatively tall concrete poles, and the need for manual pushing of the testing device to move the steel reinforcement located inside the concrete pole when performing electromagnetic corrosion non-destructive testing, which makes the overall monitoring process cumbersome.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an electromagnetic induction type non-destructive testing device for steel reinforcement corrosion of concrete poles, comprising a concrete pole, wherein a self-lifting electromagnetic steel reinforcement corrosion testing device is provided on the outer side of the concrete pole, the self-lifting electromagnetic steel reinforcement corrosion testing device comprising two self-moving electromagnetic steel reinforcement corrosion detectors, two arc-shaped clamping plates, a clamping and fixing mechanism, and a lifting mechanism, wherein the two self-moving electromagnetic steel reinforcement corrosion detectors are respectively installed on the outer surface of the two arc-shaped clamping plates, the clamping and fixing mechanism can synchronously push the two arc-shaped clamping plates toward the concrete pole, and the lifting mechanism can synchronously drive the self-moving electromagnetic steel reinforcement corrosion detectors, the arc-shaped clamping plates, and the clamping and fixing mechanism to move up and down along the concrete pole;

[0007] The self-moving electromagnetic concrete rebar corrosion instrument includes a slider, a corrosion instrument mounting frame, a wireless concrete rebar corrosion instrument, and a slide rail. The slider is installed inside the slide rail, the corrosion instrument mounting frame is located on the outer surface of the slider, and the wireless concrete rebar corrosion instrument is fixed inside the corrosion instrument mounting frame.

[0008] Preferably, the clamping and fixing mechanism includes a square housing, and a wireless communication module is fixedly installed on one side of the outer surface of the square housing, and the wireless communication module is electrically connected to the clamping and fixing mechanism and the lifting mechanism.

[0009] A clamping motor is fixedly installed on one side inside the square housing. The output shaft of the clamping motor is connected to a transmission shaft via a coupling. A first bevel gear is fixedly sleeved on the outer surface of the transmission shaft. A second bevel gear meshes with both sides of the outer surface of the first bevel gear. A threaded rod shaft is connected to the axis of the second bevel gear, and the threaded rod shaft is connected to the square housing via a roller bearing.

[0010] Preferably, a threaded rod is fixedly connected to the front end face of the first threaded rod shaft and the rear end face of the second threaded rod shaft from left to right. The two arc-shaped clamping plates are respectively installed on the outer surfaces of the two threaded rods through a threaded structure, and the arc-shaped clamping plates are slidably connected to the square shell.

[0011] Preferably, one side of the clamping motor is fixedly installed in a reinforcing cylinder inside the square housing. The piston rod of the reinforcing cylinder is connected to a concave push rod. A rectangular block is provided on both sides in front of the concave push rod, and the surface of the rectangular block facing the concave push rod is an inclined surface.

[0012] Preferably, a spring is connected to the side of the rectangular block facing the clamping motor, and a spring positioning groove is provided on the outer side of each end of the spring, located on the outer surface of the rectangular block and inside the square outer shell, respectively.

[0013] Preferably, a reinforcing rod is fixedly connected to the front end face of the rectangular block, and a rubber sleeve fixedly fitted onto the outer surface of the transmission shaft is provided between the two reinforcing rods.

[0014] Preferably, the surface of the reinforcing rod facing the rubber sleeve is arc-shaped, and the arc-shaped surface on the outer surface of the reinforcing rod is provided with multiple interlocking stripes.

[0015] Preferably, the lifting mechanism includes eight lifting motors, the output shafts of the lifting motors are connected to a lifting shaft via a coupling, and a high-friction lifting roller is fixedly sleeved on the outer surface of the lifting shaft. The eight high-friction lifting rollers are respectively located on both sides of the upper and lower end faces of the two arc-shaped clamping plates, and the surfaces of the high-friction lifting rollers facing the concrete rod are in contact with the concrete rod.

[0016] Preferably, the wireless concrete rebar corrosion instrument includes a concrete rebar corrosion instrument and a wireless data transmission module, wherein the wireless data transmission module is installed on the outer surface of the concrete rebar corrosion instrument.

[0017] A detection method for a non-destructive testing device for steel reinforcement corrosion of electromagnetic induction concrete towers, the detection method comprising the following steps;

[0018] Step S1: Move the two arc-shaped clamping plates that are slidably installed on the outer surface of the square shell to both sides of the bottom end of the concrete pole. Then, push the two arc-shaped clamping plates toward the concrete pole through the clamping and fixing mechanism until the eight lifting high-friction rollers located on the outer surface of the two arc-shaped clamping plates are in contact with the concrete pole.

[0019] Step S2: After all the high-friction rollers for lifting are in contact with the concrete pole, the wireless concrete rebar corrosion instrument fixed inside the slider is driven by the slider to move parallel along the concrete pole, so as to perform electromagnetic detection on the rebar located inside the bottom end of the concrete pole.

[0020] Step S3: After the steel reinforcement inside the bottom end of the concrete pole is inspected, the high-friction rollers for lifting are driven to rotate by the lifting mechanism. This drives the wireless concrete steel reinforcement corrosion instrument installed on the outer surface of the arc-shaped clamping plate to slowly move upward along the concrete pole at a speed of one centimeter per second. During this process, do not turn off the slider. Continue to drive the wireless concrete steel reinforcement corrosion instrument to move parallel through the slider to prevent any positions on the concrete pole from being missed.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] I. The present invention uses a self-lifting electromagnetic concrete pole tower steel reinforcement corrosion detection device to automatically drive a self-moving electromagnetic concrete steel reinforcement corrosion instrument to move up and down along the concrete pole. Through the above technical solution, the testing personnel can perform comprehensive electromagnetic steel reinforcement corrosion detection on the overall tall concrete pole from the ground, thereby improving the convenience of the equipment.

[0023] Second, the present invention uses a slider located inside the self-moving electromagnetic concrete rebar corrosion instrument to automatically drive the wireless concrete rebar corrosion instrument used for detection to move in parallel. Through the above technical solution, the automation level of the equipment is further improved, and it can also prevent the situation where some positions on the concrete pole are not detected. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the detection device of the present invention;

[0025] Figure 2 This is a schematic diagram (top view) of the overall structure of the detection device of the present invention;

[0026] Figure 3 for Figure 3 Enlarged view of the structure at point C;

[0027] Figure 4 for Figure 3 Enlarged view of the structure at point B;

[0028] Figure 5 for Figure 4 Enlarged view of the structure at point D;

[0029] Figure 6 for Figure 1 Enlarged view of the structure at point A in the middle;

[0030] The diagram shows the following markings: 1. Concrete rod; 2. Self-moving electromagnetic concrete rebar corrosion meter; 201. Slider; 202. Corrosion meter mounting frame; 203. Wireless concrete rebar corrosion meter; 204. Slide rail; 3. Square outer shell; 4. Clamping motor; 5. Transmission shaft; 6. First bevel gear; 7. Second bevel gear; 8. Threaded rod shaft; 9. Threaded rod; 10. Arc-shaped clamping plate; 11. Lifting motor; 12. Lifting shaft; 13. High-friction roller for lifting; 14. Reinforcing cylinder; 15. Concave push rod; 16. Rectangular block; 17. Inclined surface; 18. Reinforcing rod; 19. Rubber sleeve; 20. Spring; 21. Spring positioning groove; 22. Wireless communication module. Detailed Implementation

[0031] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0032] See also Figures 1 to 6 An embodiment of the present invention provides an electromagnetic induction type non-destructive testing device for steel reinforcement corrosion of concrete poles, comprising a concrete pole 1, and a self-lifting electromagnetic steel reinforcement corrosion testing device for concrete poles 1 on the outer side of the concrete pole 1. The self-lifting electromagnetic steel reinforcement corrosion testing device includes two self-moving electromagnetic steel reinforcement corrosion detectors 2, two arc-shaped clamping plates 10, a clamping and fixing mechanism, and a lifting mechanism. The two self-moving electromagnetic steel reinforcement corrosion detectors 2 are respectively installed on the outer surface of the two arc-shaped clamping plates 10. The clamping and fixing mechanism can simultaneously push the two arc-shaped clamping plates 10 toward the concrete pole 1. The lifting mechanism can simultaneously drive the self-moving electromagnetic steel reinforcement corrosion detectors 2, the arc-shaped clamping plates 10, and the clamping and fixing mechanism to move up and down along the concrete pole 1.

[0033] The clamping and fixing mechanism includes a square housing 3. A wireless communication module 22 is fixedly installed on one side of the outer surface of the square housing 3, and the wireless communication module 22 is electrically connected to the clamping and fixing mechanism and the lifting mechanism. The clamping and fixing mechanism and the lifting mechanism can be controlled through the wireless communication module 22.

[0034] A clamping motor 4 is fixedly installed on one side inside the square outer shell 3. The output shaft of the clamping motor 4 is connected to a transmission shaft 5 via a coupling. A first bevel gear 6 is fixedly sleeved on the outer surface of the transmission shaft 5. A second bevel gear 7 meshes with both sides of the outer surface of the first bevel gear 6. A threaded rod shaft 8 is connected to the shaft of the second bevel gear 7, and the threaded rod shaft 8 is connected to the square outer shell 3 via a roller bearing. A threaded rod 9 is fixedly connected to the front end face of the first threaded rod shaft 8 and the rear end face of the second threaded rod shaft 8 from left to right. Two arc-shaped clamping plates 10 are respectively installed on the outer surfaces of the two threaded rods 9 via threaded structures. The two arc-shaped clamping plates 10 are slidably connected to the square outer shell 3. When the equipment needs to be used, the two arc-shaped clamping plates 10 slidably installed on the outer surface of the square outer shell 3 are moved to the two sides of the bottom end of the concrete rod 1, and then the clamping motor 4 is started. The clamping motor 4 can drive the transmission shaft 5 connected to it and the first bevel gear 6 fixedly sleeved on the outer surface of the transmission shaft 5 to rotate. The rotating first bevel gear 6 can drive the two second bevel gears 7 meshing with it and the threaded rod shaft 8 connected to the axis of the second bevel gear 7 to rotate. The rotating threaded rod shaft 8 can drive the threaded rod 9 fixed to it to rotate together.

[0035] Since the arc-shaped clamping plate 10, which is installed on the outer surface of the threaded rod 9 via a threaded structure, is slidably connected to the square outer shell 3, the arc-shaped clamping plate 10 cannot rotate on its own.

[0036] The lifting mechanism includes eight lifting motors 11. The output shafts of the lifting motors 11 are connected to lifting shafts 12 via couplings. A high-friction lifting roller 13 is fixedly sleeved on the outer surface of the lifting shaft 12. The eight high-friction lifting rollers 13 are located on both sides of the upper and lower end faces of the two arc-shaped clamping plates 10, and the faces of the high-friction lifting rollers 13 facing the concrete rod 1 are in contact with the concrete rod 1. When the threaded rod 9 rotates, the arc-shaped clamping plate 10, which is threaded to it but cannot rotate on its own, will move parallel along the arc-shaped clamping plate 10 under the drive of the threaded structure. At this time, the arc-shaped clamping plate 10 is pushed towards the concrete rod 1 until all eight high-friction lifting rollers 13 located on the outer surfaces of the two arc-shaped clamping plates 10 are in contact with the concrete rod 1.

[0037] The self-moving electromagnetic concrete rebar corrosion tester 2 includes a slider 201, a corrosion tester mounting frame 202, a wireless concrete rebar corrosion tester 203, and a slide rail 204. The slider 201 is installed inside the slide rail 204, the corrosion tester mounting frame 202 is located on the outer surface of the slider 201, and the wireless concrete rebar corrosion tester 203 is fixed inside the corrosion tester mounting frame 202. The wireless concrete rebar corrosion tester 203 includes a concrete rebar corrosion tester and a wireless data transmission module, the wireless data transmission module being installed on the outer surface of the concrete rebar corrosion tester. When all lifting is done using high friction... After the rollers 13 are in contact with the concrete rod 1, the wireless concrete rebar corrosion detector 203, which is fixed inside the slider 201, moves parallel to the concrete rod 1 via the slider 201. This allows for electromagnetic detection of the rebar located inside the bottom end of the concrete rod 1, and the detection data is transmitted to the cloud via a wireless data transmission module. This technical solution enables the wireless concrete rebar corrosion detector 203 to move parallel automatically, thereby performing electromagnetic detection on the rebar located inside the concrete rod 1, thus improving the automation level of the equipment.

[0038] A reinforcing cylinder 14 is fixedly installed inside the square housing 3 on one side of the clamping motor 4. The piston rod of the reinforcing cylinder 14 is connected to a concave push rod 15. A rectangular block 16 is provided on both sides in front of the concave push rod 15, and the surface of the rectangular block 16 facing the concave push rod 15 is an inclined surface 17. If the top end and bottom end of the concrete rod 1 being tested are the same size, when the wireless concrete steel corrosion instrument 203 is just started, the concave push rod 15 connected to it is pushed forward by the reinforcing cylinder 14. As the concave push rod 15 moves, it will contact the inclined surface 17 on the outer surface of the rectangular block 16 and push the rectangular block 16 toward the direction of the transmission shaft 5.

[0039] A spring 20 is connected to the side of the rectangular block 16 facing the clamping motor 4. A spring positioning groove 21 is provided on the outer side of both ends of the spring 20, located on the outer surface of the rectangular block 16 and inside the square outer shell 3, respectively. When the rectangular block 16 is pushed and moved, it will squeeze the spring 20 connected to it.

[0040] A reinforcing rod 18 is fixedly connected to the front end face of the rectangular block 16. A rubber sleeve 19 is fixedly fitted onto the outer surface of the transmission shaft 5 between the two reinforcing rods 18. The surface of the reinforcing rod 18 facing the rubber sleeve 19 is arc-shaped, and multiple interlocking stripes are provided on the arc-shaped surface of the outer surface of the reinforcing rod 18. As the rectangular block 16 moves, the reinforcing rod 18 fixed to it will move along with it. As the reinforcing rod 18 moves, the interlocking stripes on the arc-shaped surface of the reinforcing rod 18 will bite into the interior of the rubber sleeve 19 fixed to the outer surface of the transmission shaft 5, thereby fixing the transmission shaft 5. By fixing the transmission shaft 5, the two arc-shaped clamping plates 10 can be prevented from moving during the process of the whole equipment moving up and down along the concrete pole 1. This would cause the contact between some of the lifting motors 11 installed on the arc-shaped clamping plates 10 and the concrete pole 1 to be released, ultimately causing the whole equipment to fall downward. The above technical solution improves the stability of the whole equipment when moving up and down along the concrete pole 1.

[0041] When it is necessary to remove the equipment, first pull the concave push rod 15 back to its original position by using the reinforcing cylinder 14. As the concave push rod 15 moves back to its original position, the reaction force of the compressed spring 20 can push the reinforcing rod 18 back to its original position, thereby releasing the fixation of the transmission shaft 5. Then, the clamping motor 4 can drive the transmission shaft 5 to rotate in the opposite direction, thereby moving the two arc-shaped clamping plates 10 outward in sync. When both arc-shaped clamping plates 10 have returned to their original positions, the entire equipment can be removed directly.

[0042] If the top end of the concrete rod 1 being tested is smaller than the bottom end, do not start the processing cylinder 14 when the wireless concrete rebar corrosion instrument 203 is first started. Then, as the entire device moves upward along the concrete rod 1 through the lifting mechanism, the two arc-shaped clamping plates 10 are pushed inward synchronously through the clamping and fixing mechanism to ensure that the high-friction rollers 13 for lifting located on the outer surface of the arc-shaped clamping plates 10 are always in contact with the concrete rod 1.

[0043] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. An electromagnetic induction-based non-destructive testing device for steel reinforcement corrosion of concrete towers, comprising a concrete tower (1), characterized in that: The concrete pole (1) is provided with a self-lifting electromagnetic concrete pole tower steel corrosion detection device on its outer side. The self-lifting electromagnetic concrete pole tower steel corrosion detection device includes two self-moving electromagnetic concrete steel corrosion detectors (2), two arc-shaped clamping plates (10), a clamping and fixing mechanism and a lifting mechanism. The two self-moving electromagnetic concrete steel corrosion detectors (2) are respectively installed on the outer surface of the two arc-shaped clamping plates (10). The clamping and fixing mechanism can push the two arc-shaped clamping plates (10) towards the concrete pole (1) in a synchronous manner. The lifting mechanism can drive the self-moving electromagnetic concrete steel corrosion detectors (2), arc-shaped clamping plates (10) and clamping and fixing mechanism to move up and down along the concrete pole (1) in a synchronous manner. The self-moving electromagnetic concrete rebar corrosion instrument (2) includes a slider (201), a corrosion instrument mounting frame (202), a wireless concrete rebar corrosion instrument (203), and a slide rail (204). The slider (201) is installed inside the slide rail (204), the corrosion instrument mounting frame (202) is located on the outer surface of the slider (201), and the wireless concrete rebar corrosion instrument (203) is fixed inside the corrosion instrument mounting frame (202).

2. The electromagnetic induction type non-destructive testing device for steel reinforcement corrosion of concrete towers according to claim 1, characterized in that: The clamping and fixing mechanism includes a square shell (3), and a wireless communication module (22) is fixedly installed on one side of the outer surface of the square shell (3). The wireless communication module (22) is electrically connected to the clamping and fixing mechanism and the lifting mechanism. A clamping motor (4) is fixedly installed on one side inside the square outer shell (3). The output shaft of the clamping motor (4) is connected to a transmission shaft (5) through a coupling. A first bevel gear (6) is fixedly sleeved on the outer surface of the transmission shaft (5). A second bevel gear (7) meshes with both sides of the outer surface of the first bevel gear (6). A threaded rod shaft (8) is connected to the axis of the second bevel gear (7). The threaded rod shaft (8) is connected to the square outer shell (3) through a roller bearing.

3. The electromagnetic induction type non-destructive testing device for steel reinforcement corrosion of concrete towers according to claim 2, characterized in that: From left to right, the front end face of the first threaded rod shaft (8) and the rear end face of the second threaded rod shaft (8) are both fixedly connected to a threaded rod (9). The two arc-shaped clamping plates (10) are respectively installed on the outer surfaces of the two threaded rods (9) through a threaded structure, and the arc-shaped clamping plates (10) are slidably connected to the square shell (3).

4. The electromagnetic induction type non-destructive testing device for steel reinforcement corrosion of concrete towers according to claim 3, characterized in that: The clamping motor (4) is fixedly installed on one side of the reinforcing cylinder (14) inside the square shell (3). The piston rod of the reinforcing cylinder (14) is connected to a concave push rod (15). A rectangular block (16) is provided on both sides in front of the concave push rod (15), and the surface of the rectangular block (16) facing the concave push rod (15) is an inclined surface (17).

5. The electromagnetic induction type non-destructive testing device for steel reinforcement corrosion of concrete towers according to claim 4, characterized in that: A spring (20) is connected to the side of the rectangular block (16) facing the clamping motor (4). A spring positioning groove (21) is provided on the outer side of both ends of the spring (20) and located on the outer surface of the rectangular block (16) and inside the square shell (3).

6. The electromagnetic induction type non-destructive testing device for steel reinforcement corrosion of concrete towers according to claim 4, characterized in that: A reinforcing rod (18) is fixedly connected to the front end face of the rectangular block (16), and a rubber sleeve (19) is fixedly sleeved on the outer surface of the transmission shaft (5) between the two reinforcing rods (18).

7. The electromagnetic induction type non-destructive testing device for steel reinforcement corrosion of concrete towers according to claim 6, characterized in that: The surface of the reinforcing rod (18) facing the rubber sleeve (19) is arc-shaped, and the arc-shaped surface on the outer surface of the reinforcing rod (18) is provided with multiple interlocking stripes.

8. The electromagnetic induction type non-destructive testing device for steel reinforcement corrosion of concrete towers according to claim 1, characterized in that: The lifting mechanism includes eight lifting motors (11). The output shaft of the lifting motor (11) is connected to a lifting shaft (12) via a coupling. A high-friction roller (13) for lifting is fixedly sleeved on the outer surface of the lifting shaft (12). The eight high-friction rollers (13) for lifting are located on both sides of the upper and lower end faces of the two arc-shaped clamping plates (10), and the surface of the high-friction rollers (13) facing the concrete rod (1) is in contact with the concrete rod (1).

9. The electromagnetic induction type non-destructive testing device for steel reinforcement corrosion of concrete towers according to claim 1, characterized in that: The wireless concrete rebar corrosion instrument (203) includes a concrete rebar corrosion instrument and a wireless data transmission module, wherein the wireless data transmission module is installed on the outer surface of the concrete rebar corrosion instrument.

10. A detection method for a non-destructive testing device for steel reinforcement corrosion of electromagnetic induction concrete towers, characterized in that: The detection method includes the following steps; Step S1: Move the two arc-shaped clamping plates (10) that are slidably installed on the outer surface of the square shell (3) to the two sides of the bottom end of the concrete rod (1), and then push the two arc-shaped clamping plates (10) toward the concrete rod (1) through the clamping and fixing mechanism until the eight lifting high friction rollers (13) located on the outer surface of the two arc-shaped clamping plates (10) are in contact with the concrete rod (1); Step S2: When all the high-friction rollers (13) for lifting are in contact with the concrete rod (1), the wireless concrete steel corrosion instrument (203) fixed inside the slider (201) is driven by the slider (201) to move parallel along the concrete rod (1) in order to perform electromagnetic detection on the steel bars located inside the bottom end of the concrete rod (1). Step S3: After the steel bar inside the bottom end of the concrete rod (1) is inspected, the high friction roller (13) for lifting is driven to rotate by the lifting mechanism, thereby driving the wireless concrete steel bar corrosion instrument (203) installed on the outer surface of the arc-shaped clamping plate (10) to slowly move upward along the concrete rod (1) at a speed of one centimeter per second. During this process, do not close the slider (201), and continue to drive the wireless concrete steel bar corrosion instrument (203) to move parallel through the slider (201) to prevent the situation where some positions on the concrete rod (1) are not detected.

Images