A device for monitoring cracks in a concrete beam with FRP tendon
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- SHAANXI TRANSPORTATION VOCATIONAL & TECH COLLEGE
- Filing Date
- 2026-04-20
- Publication Date
- 2026-06-30
Smart Images
Figure CN122306944A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of FRP-reinforced concrete beam crack monitoring technology, specifically to an FRP-reinforced concrete beam crack monitoring device. Background Technology
[0002] Crack monitoring of FRP-reinforced concrete beams refers to the entire process of identifying, recording, analyzing, and evaluating cracks that occur in concrete beams that use FRP fiber-reinforced polymer as a substitute or reinforcement for steel bars during use. Its core purpose is to assess the structural safety, durability, and performance degradation of the beams through crack monitoring, so as to take timely reinforcement or maintenance measures to ensure the safety and durability of the structure.
[0003] The common method for monitoring cracks in FRP-reinforced concrete beams is the ultrasonic pulse flat-surface method. This method involves placing a transmitting probe and a receiving probe on either side of the crack on the surface of the FRP-reinforced concrete beam. The presence, location, and approximate width of the crack are determined by measuring changes in parameters such as the propagation time, amplitude, and frequency of ultrasonic waves in the concrete. The data is then stably connected to the ultrasonic testing host via a wired connection. However, during testing, the operator needs to hold the transmitting and receiving probes by hand and continuously adjust their positions for multi-position monitoring. Manual placement results in large errors, making it difficult to ensure stable monitoring and causing deviations in the monitoring results. Furthermore, the cables are prone to pulling and tangling, making it difficult for a single person to complete the test independently. Usually, two or more people are required to operate the test, which is not conducive to continuous and rapid monitoring of long cracks.
[0004] Combining the above problems, we find that existing FRP-reinforced concrete beam crack monitoring devices are difficult to avoid all the aforementioned issues when in use. Even if they can be solved, they require external tools, thus failing to achieve the desired effect. Therefore, we propose an FRP-reinforced concrete beam crack monitoring device. Summary of the Invention
[0005] The purpose of this invention is to provide a crack monitoring device for FRP-reinforced concrete beams to solve the problems mentioned in the background art.
[0006] To achieve the above objectives, the present invention provides the following technical solution: a crack monitoring device for FRP-reinforced concrete beams, comprising a main body, the main body comprising an ultrasonic testing instrument host body, a host display screen fixedly connected to the upper surface of the ultrasonic testing instrument host body, two edge-protecting pads fixedly connected to the outer surface of the ultrasonic testing instrument host body, two fixing blocks fixedly connected to the outer surface of the ultrasonic testing instrument host body, two host signal transmission lines fixedly installed on the upper surface of the ultrasonic testing instrument host body, and a fixing adjustment mechanism provided on the outer side of the ultrasonic testing instrument host body;
[0007] The fixing and adjusting mechanism includes a position fixing unit, which is located on the outside of the main body of the ultrasonic detector. The position fixing unit is used to securely fix the probe in a preset monitoring position.
[0008] The fixing adjustment mechanism further includes a position adjustment unit located inside the position fixing unit, which is used to adjust the monitoring position of the transmitter and receiver;
[0009] A cable organizing mechanism is provided on the outside of the positioning unit. The cable organizing mechanism is located on the outside of the positioning unit and is used to organize and fix the cables in an orderly manner.
[0010] Preferably, the positioning unit includes two docking blocks, the inner walls of the two docking blocks are slidably connected to a fixing frame, the upper surface of the fixing frame is fixedly connected to a support frame, the outer surface of the fixing frame is fixedly connected to a multi-port ring pipe, the outer surface of the multi-port ring pipe is fixedly connected to vacuum suction heads arranged at equal intervals, the outer surface of the support frame is fixedly connected to a negative pressure pipe, the left side of the fixing frame is fixedly connected to a vacuum pump, the input end of the vacuum pump is fixedly connected to a three-way pipe, one input end of the three-way pipe is fixedly connected to the output end of the negative pressure pipe, and the three-way pipe... Another input end is fixedly connected to the output end of the multi-loop pipe. The outer surface of the negative pressure pipe is fixedly connected to a limiting tube arranged at equal intervals. The outer surface of each limiting tube is fixedly connected to the inner wall of the support frame. The inner wall of each limiting tube is slidably connected to a piston-type lifting rod. The bottom ends of several piston-type lifting rods are fixedly connected to a limiting pressure plate. The outer surface of the limiting pressure plate is slidably connected to the inner wall of the support frame. The upper surface of the limiting pressure plate is fixedly connected to a first spring arranged at equal intervals. The top end of each first spring is fixedly connected to the inner top wall of the support frame.
[0011] Preferably, the inner wall of each of the mating blocks is threaded with a threaded post, and the outer surface of each threaded post is threaded to the inner wall of the fixing frame.
[0012] Preferably, the output end of the multi-loop pipe is fixedly connected to a first solenoid valve, and the output end of the negative pressure pipe is fixedly connected to a second solenoid valve.
[0013] Preferably, each of the vacuum nozzles is fixedly connected to a soft pad at the end away from the multi-loop tube, and the soft pad and the vacuum nozzle are located above and below the fixing frame, respectively.
[0014] Preferably, the position adjustment unit includes two sliding plates, the outer surface of each sliding plate being slidably connected to the inner wall of the fixing frame, the upper surface of each sliding plate being in contact with the bottom surface of the limiting pressure plate, a position adjustment frame being slidably connected to the inner wall of the fixing frame, four fixing cylinders being fixedly connected to the inner wall of each position adjustment frame, a telescopic rod being slidably connected to the inner wall of each fixing cylinder, a fixing plate being fixedly connected to the end of each set of telescopic rods away from the position adjustment frame, a monitoring probe being fixedly connected to the inner wall of each fixing plate, and a probe signal transmission line being fixedly installed on the outer surface of each monitoring probe. Each telescopic rod has a connecting rod fixedly connected to one end near the position adjustment frame. The outer surface of each connecting rod is slidably connected to the inner wall of the fixed cylinder. Each set of connecting rods has an adsorption iron plate fixedly connected to one end near the position adjustment frame. Each telescopic rod has a second spring fixedly connected to one end near the position adjustment frame. The end of each second spring away from the telescopic rod is fixedly connected to the inner wall of the fixed cylinder. Each position adjustment frame has two fixed frames fixedly connected to one side away from the fixed plate. The upper surface of each fixed frame is fixedly connected to the bottom surface of the sliding plate. Each fixed frame has an electromagnet fixedly connected to its inner wall.
[0015] Preferably, the cable organizing mechanism includes a storage tube, the outer surface of each docking block is fixedly connected to the outer surface of the storage tube, the outer surface of each fixing block is fixedly connected to the outer surface of the storage tube, a winding roller is rotatably connected to the inner wall of the storage tube, each probe signal transmission line is wound around the surface of the winding roller, a closed tube is rotatably connected to both ends of the winding roller, the outer surface of each closed tube is fixedly connected to the inner wall of the storage tube, a return coil spring is fixedly connected to the inner wall of each closed tube, the inner ring of each return coil spring is fixedly connected to the outer surface of the winding roller, a ratchet is fixedly connected to the right end of the winding roller, a rotating shaft is rotatably connected to the inner wall of the storage tube, a pawl is fixedly connected to the outer surface of the rotating shaft, the outer surface of the pawl contacts the outer surface of the ratchet, two conductive slip rings are fixedly connected to the outer surface of the storage tube, one end of each probe signal transmission line near the storage tube is fixedly connected to the rotating end of the conductive slip ring, and one end of each host signal transmission line near the storage tube is fixedly connected to the fixed end of the conductive slip ring.
[0016] Preferably, a rotating block is fixedly connected to the right end of the rotating shaft, and the outer surface of the rotating block is provided with anti-slip grooves arranged at equal intervals.
[0017] Preferably, each of the conductive slip rings has two stabilizing posts fixedly connected to its rotating end, and the top of each stabilizing post is fixedly connected to the inner wall of the winding roller.
[0018] Preferably, an elastic sheet is fixedly connected to the inner wall of the storage tube, and the outer surface of the elastic sheet is in contact with the outer surface of the pawl.
[0019] Compared with the prior art, the beneficial effects of the present invention are:
[0020] 1. This invention, by setting a position fixing unit, can use the principle of vacuum adsorption to firmly fix the device on the surface of FRP reinforced concrete beam, eliminating the need for manual handling and facilitating single-person operation. Furthermore, by using the principle of vacuum adsorption in conjunction with the first spring and the limiting pressure plate, the monitoring probe can be pre-tightened and quickly adjusted, effectively reducing errors caused by manual placement and ensuring the probe remains stable during monitoring, thereby improving the accuracy of monitoring results and facilitating continuous and rapid monitoring of long cracks.
[0021] 2. By setting a position adjustment unit, the present invention can adjust the distance between the monitoring probe and the concrete beam, and can realize the rapid switching between monitoring and adjustment states. This facilitates the adjustment of the monitoring position or the protection of the probe in the non-monitoring state, making the process of monitoring work by a single person more continuous and convenient.
[0022] 3. This invention, by setting up a cable management mechanism, can orderly store and dynamically manage the probe signal transmission line. The probe signal transmission line will be pulled out from the winding roller or automatically retracted under the action of the reset spring, avoiding damage or interference to the monitoring operation caused by the cable being pulled or tangled. The ratchet and pawl cooperation structure can prevent the winding roller from rotating in the opposite direction when the probe signal transmission line is pulled out, ensuring the cable length is stable. Through the overall cable mechanism and the fixing and adjustment mechanism, the cable can be kept in an orderly state during the monitoring process, further improving the feasibility of single-person operation and monitoring efficiency. Moreover, the cable can be pulled out and fixed during use, and after use, it can be recycled and stored in conjunction with the overall cable mechanism. Attached Figure Description
[0023] Figure 1 This is a schematic diagram of the overall structure of the present invention;
[0024] Figure 2 This is a schematic diagram of the structure of the fixing frame of the present invention;
[0025] Figure 3 This is a schematic diagram of the structure of the docking block of the present invention;
[0026] Figure 4 This is a schematic diagram of the vacuum pump of the present invention;
[0027] Figure 5 This is a cross-sectional structural schematic diagram of the support frame of the present invention;
[0028] Figure 6 This is a schematic diagram of the structure of the sliding plate of the present invention;
[0029] Figure 7 This is a cross-sectional structural schematic diagram of the fixed cylinder of the present invention;
[0030] Figure 8 This is a schematic diagram of the structure of the probe signal transmission line of the present invention;
[0031] Figure 9 This is a schematic diagram of the left cross-sectional view of the winding roller of the present invention;
[0032] Figure 10 This is a schematic diagram of the conductive slip ring of the present invention.
[0033] In the diagram: 1. Main body; 11. Ultrasonic testing instrument main unit; 12. Main unit display screen; 13. Edge protector; 14. Fixing block; 15. Main unit signal transmission line; 2. Fixing and adjustment mechanism; 21. Position fixing unit; 2101. Connecting block; 2102. Fixing frame; 2103. Support frame; 2104. Negative pressure pipe; 2105. Multi-way ring pipe; 2106. Vacuum suction head; 2107. Threaded column; 2108. Vacuum pump; 2109. T-shaped pipe; 2110. First solenoid valve; 2111. Second solenoid valve; 2112. Piston lifting rod; 2113. Limiting pressure plate; 2114. First spring; 2115. Soft pad; 2116. Limiting pipe; 22. Position adjustment unit; 2201. Sliding plate; 2202. Probe signal transmission line; 2203. Position adjustment frame; 2204. Fixing cylinder; 2205. Telescopic rod; 2206. Fixing plate; 2207. Monitoring probe; 2208. Fixing frame; 2209. Second spring; 2210. Connecting rod; 2211. Adsorption iron plate; 2212. Electromagnet; 3. Cable management mechanism; 301. Storage cylinder; 302. Winding roller; 303. Enclosed cylinder; 304. Reset coil spring; 305. Ratchet; 306. Rotating shaft; 307. Pawl; 308. Elastic sheet; 309. Conductive slip ring; 310. Stabilizing column; 311. Rotating block; 312. Anti-slip groove. Detailed Implementation
[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0035] Example 1: Please refer to Figures 1-5The present invention provides a technical solution: a crack monitoring device for FRP reinforced concrete beams, comprising a main body 1, the main body 1 including an ultrasonic detector host body 11, a host display screen 12 fixedly connected to the upper surface of the ultrasonic detector host body 11, two edge-protecting pads 13 fixedly connected to the outer surface of the ultrasonic detector host body 11, two fixing blocks 14 fixedly connected to the outer surface of the ultrasonic detector host body 11, two host signal transmission lines 15 fixedly installed on the upper surface of the ultrasonic detector host body 11, and a fixing adjustment mechanism 2 provided on the outer side of the ultrasonic detector host body 11.
[0036] The fixing and adjusting mechanism 2 includes a position fixing unit 21, which is located on the outside of the main body 11 of the ultrasonic testing instrument. The position fixing unit 21 is used to securely fix the probe in the preset monitoring position.
[0037] As a further definition of the fixing and adjusting mechanism 2 of the present invention, the position fixing unit 21 includes two docking blocks 2101. A fixing frame 2102 is commonly provided on the inner walls of the two docking blocks 2101. A support frame 2103 is fixedly connected to the upper surface of the fixing frame 2102. A multi-pass ring pipe 2105 is fixedly connected to the outer surface of the fixing frame 2102. Vacuum suction heads 2106 arranged at equal intervals are fixedly connected to the outer surface of the multi-pass ring pipe 2105. A negative pressure pipe 210 is fixedly connected to the outer surface of the support frame 2103. 4. A vacuum pump 2108 is fixedly connected to the left side of the fixing frame 2102. The input end of the vacuum pump 2108 is fixedly connected to a three-way pipe 2109. One input end of the three-way pipe 2109 is fixedly connected to the output end of the negative pressure pipe 2104, and the other input end of the three-way pipe 2109 is fixedly connected to the output end of the multi-way ring pipe 2105. The outer surface of the negative pressure pipe 2104 is fixedly connected to equidistant limiting pipes 2116. The outer surface of each limiting pipe 2116 is connected to the support frame 210. The inner wall of the support frame 2103 is fixedly connected to the inner wall of the support frame 2116. A piston-type lifting rod 2112 is slidably connected to the inner wall of the support frame 2103. The bottom ends of several piston-type lifting rods 2112 are fixedly connected to a limiting pressure plate 2113. The outer surface of the limiting pressure plate 2113 is slidably connected to the inner wall of the support frame 2103. Several first springs 2114 are equidistantly arranged on the upper surface of the limiting pressure plate 2113. The top of each first spring 2114 is fixedly connected to the inner top wall of the support frame 2103. By setting the position fixing unit 21, the device can be firmly fixed to the surface of the FRP reinforced concrete beam using the principle of vacuum adsorption. No manual hand-held operation is required, which is convenient for single-person operation. Furthermore, by using the principle of vacuum adsorption in conjunction with the first springs 2114 and the limiting pressure plate 2113, the monitoring probe 2207 can be pre-tightened and quickly adjusted, effectively reducing the error caused by manual hand-held placement, ensuring that the probe remains stable during monitoring, thereby improving the accuracy of the monitoring results and facilitating continuous and rapid monitoring of long cracks.
[0038] Please see Figure 3 Each docking block 2101 has a threaded post 2107 threaded to its inner wall, and the outer surface of each threaded post 2107 is threaded to the inner wall of the fixing frame 2102. Using the threaded post 2107, the docking block 2101 and the fixing frame 2102 can be detachably fixed. When monitoring is required, the threaded post 2107 can be unscrewed to separate the parts. The operation is convenient and the connection can also improve the integration effect of the device and improve the convenience.
[0039] Please see Figure 4 The output end of the multi-way loop 2105 is fixedly connected to the first solenoid valve 2110, and the output end of the negative pressure pipe 2104 is fixedly connected to the second solenoid valve 2111. By using the first solenoid valve 2110 and the second solenoid valve 2111, the passage status between the multi-way loop 2105 and the negative pressure pipe 2104 and the vacuum pump 2108 can be controlled respectively, so that the vacuum state inside the multi-way loop 2105 and the negative pressure pipe 2104 can be maintained, and it is also convenient to open the multi-way loop 2105 and the negative pressure pipe 2104 for depressurization.
[0040] Please see Figure 3 Each vacuum nozzle 2106 has a soft pad 2115 fixedly connected to the end away from the multi-loop tube 2105. The soft pad 2115 and the vacuum nozzle 2106 are located above and below the fixing frame 2102. The soft pad 2115 is made of high-elasticity silicone material and has no micropores for sealing. When the vacuum nozzle 2106 is adsorbed on the surface of the concrete beam, the soft pad 2115 can fit tightly against the uneven parts of the beam, which not only enhances the sealing of the adsorption and prevents air leakage from affecting the fixing effect, but also avoids the vacuum nozzle 2106 from hard contact with the beam and causing surface damage.
[0041] The specific implementation method of this embodiment is as follows: When the monitoring work is carried out, the monitoring personnel first confirm the monitoring position, unscrew the threaded post 2107 to separate the fixing frame 2102 from the docking block 2101, and then hold the fixing frame 2102 and align the vacuum suction head 2106 above and below it with the surface of the FRP reinforced concrete beam to be monitored, ensuring that the soft pad 2115 is in full contact with the beam surface. Then, start the vacuum pump 2108 and open the first solenoid valve 2110. The vacuum pump 2108 evacuates the vacuum suction head 2106 through the three-way pipe 2109 and the multi-way ring pipe 2105, so that a negative pressure is formed inside the vacuum suction head 2106. Under the action of the external atmospheric pressure, the soft pad 2115 is tightly attached to the beam surface, thereby firmly adsorbing and fixing the fixing frame 2102 to the beam and closing the first solenoid valve 2110 to maintain pressure. When releasing, simply open the first solenoid valve 2110 again to allow air to enter the multi-way ring pipe 2105 through the vacuum pump 2108.
[0042] Example 2: Please refer to Figure 1 , Figure 6 and Figure 7 The present invention provides a technical solution: a crack monitoring device for FRP reinforced concrete beams. The present invention makes corresponding improvements to the technical problems mentioned in the background art. The fixing and adjusting mechanism 2 also includes a position adjusting unit 22, which is located inside the position fixing unit 21. The position adjusting unit 22 is used to adjust the monitoring position of the transmitter and receiver.
[0043] As a further definition of the fixing and adjusting mechanism 2 of the present invention, the position adjusting unit 22 includes two sliding plates 2201. The outer surface of each sliding plate 2201 is slidably connected to the inner wall of the fixing frame 2102, and the upper surface of each sliding plate 2201 is in contact with the bottom surface of the limiting pressure plate 2113. Two position adjusting frames 2203 are slidably connected to the inner wall of the fixing frame 2102. Four fixing cylinders 2204 are fixedly connected to the inner walls of the two position adjusting frames 2203. Each fixing cylinder 2204... The inner wall of 4 is slidably connected with telescopic rods 2205. A fixing plate 2206 is fixedly connected to the end of each telescopic rod 2205 away from the position adjustment frame 2203. A monitoring probe 2207 is fixedly connected to the inner wall of each fixing plate 2206. A probe signal transmission line 2202 is fixedly installed on the outer surface of each monitoring probe 2207. A connecting rod 2210 is fixedly connected to the end of each telescopic rod 2205 near the position adjustment frame 2203. The outer surface of each connecting rod 2210... All are slidably connected to the inner wall of the fixed cylinder 2204. Each set of connecting rods 2210 is fixedly connected to an adsorption iron plate 2211 at one end near the position adjustment frame 2203. Each telescopic rod 2205 is fixedly connected to a second spring 2209 at one end near the position adjustment frame 2203. The end of each second spring 2209 away from the telescopic rod 2205 is fixedly connected to the inner wall of the fixed cylinder 2204. Each position adjustment frame 2203 is fixedly connected to two fixed frames 2208 on one side away from the fixed plate 2206. The upper surface of each fixed frame 2208 is fixedly connected to the bottom surface of the sliding plate 2201. Each fixed frame 2208 is fixedly connected to an electromagnet 2212 on the inner wall of the inner wall of the inner wall. By setting the position adjustment unit 22, the distance between the monitoring probe 2207 and the concrete beam can be adjusted, and the monitoring state and adjustment state can be quickly switched. This makes it easy to adjust the monitoring position or protect the probe in the non-monitoring state, making the process of single-person monitoring work more continuous and convenient.
[0044] The specific implementation method of this embodiment is as follows: If it is necessary to adjust the distance between the two monitoring probes 2207, the second solenoid valve 2111 is opened, and the vacuum pump 2108 is turned on again. The vacuum pump 2108 evacuates the air inside the limiting tube 2116 through the three-way pipe 2109 and the negative pressure pipe 2104, so that the piston-type lifting rod 2112 drives the limiting pressure plate 2113 to move upward under atmospheric pressure and compress the first spring 2114. At this time, the limiting pressure plate 2113 separates from the sliding plate 2201, and the piston-type lifting rod 2112... After the pressure rises, the second solenoid valve 2111 is closed to maintain pressure. Simultaneously, the monitoring personnel can push the sliding plate 2201 to slide within the support frame 2103, thereby moving the position adjustment frame 2203 and the monitoring probe 2207 to adjust the distance between the two monitoring probes 2207 to match the crack length or the area to be monitored. After adjustment, the second solenoid valve 2111 is opened, releasing the negative pressure in the limiting tube 2116. The first spring 2114, under its own elastic restoring force, pushes the limiting pressure plate 2113 downwards. The sliding plate 2201 is re-pressed to fix the adjusted position. After the position is fixed and the spacing is adjusted, the electromagnet 2212 is de-energized. At this time, the second spring 2209, under its own elastic restoring force, pushes the telescopic rod 2205 to move away from the position adjustment frame 2203, thereby driving the fixing plate 2206 and the monitoring probe 2207 closer to the beam surface until the detection surface of the monitoring probe 2207 is in close contact with the beam surface, realizing the switching of the monitoring state. When it is necessary to adjust the monitoring position or end the monitoring, the monitoring can be stopped. During measurement, the electromagnet 2212 is energized, generating a magnetic attraction that draws the adsorption plate 2211 closer to it. The adsorption plate 2211, through the connecting rod 2210, drives the telescopic rod 2205 to retract into the fixed cylinder 2204, compressing the second spring 2209. At this time, the monitoring probe 2207 separates from the beam surface and enters the adjustment state, making it easier for the monitoring personnel to move the position adjustment frame 2203 or the entire fixed frame 2102, thus avoiding damage to the monitoring probe 2207 from collision with the beam during movement.
[0045] Example 3: Please refer to Figure 1 and Figures 8-10 The present invention provides a technical solution: a crack monitoring device for FRP reinforced concrete beams. The present invention makes corresponding improvements to the technical problems mentioned in the background art. A cable organizing mechanism 3 is provided on the outside of the position fixing unit 21. The cable organizing mechanism 3 is located on the outside of the position fixing unit 21 and is used to orderly store and fix the cables.
[0046] As a further definition of the cable organizing mechanism 3 of the present invention, the cable organizing mechanism 3 includes a storage cylinder 301, the outer surface of each docking block 2101 is fixedly connected to the outer surface of the storage cylinder 301, the outer surface of each fixing block 14 is fixedly connected to the outer surface of the storage cylinder 301, a winding roller 302 is rotatably connected to the inner wall of the storage cylinder 301, each probe signal transmission line 2202 is wound around the surface of the winding roller 302, both ends of the winding roller 302 are rotatably connected to a closed cylinder 303, the outer surface of each closed cylinder 303 is fixedly connected to the inner wall of the storage cylinder 301, a return coil spring 304 is fixedly connected to the inner wall of each closed cylinder 303, the inner ring of each return coil spring 304 is fixedly connected to the outer surface of the winding roller 302, a ratchet 305 is fixedly connected to the right end of the winding roller 302, a rotating shaft 306 is rotatably connected to the inner wall of the storage cylinder 301, and the outer surface of the rotating shaft 306 is fixedly connected to... A pawl 307 is attached, and the outer surface of the pawl 307 contacts the outer surface of the ratchet 305. Two conductive slip rings 309 are fixedly connected to the outer surface of the storage cylinder 301. The end of each probe signal transmission line 2202 near the storage cylinder 301 is fixedly connected to the rotating end of the conductive slip ring 309. The end of each host signal transmission line 15 near the storage cylinder 301 is fixedly connected to the fixed end of the conductive slip ring 309. By setting the cable management mechanism 3, the probe signal transmission lines 2202 can be stored and managed in an orderly manner. The probe signal transmission lines 2202 will be pulled out from the winding roller 302 or automatically retracted under the action of the reset spring 304, avoiding damage or interference to the monitoring operation caused by the cable being pulled or tangled. The cooperation structure between the ratchet 305 and the pawl 307 can prevent the winding roller 302 from rotating in the opposite direction when the probe signal transmission line 2202 is pulled out, ensuring the stability of the cable length.
[0047] Please see Figure 9 A rotating block 311 is fixedly connected to the right end of the rotating shaft 306. The outer surface of the rotating block 311 is provided with anti-slip grooves 312 arranged at equal intervals. By using the rotating block 311 and the anti-slip grooves 312, the monitoring personnel can easily rotate the rotating shaft 306 manually, thereby driving the pawl 307 to separate from the ratchet 305. When it is necessary to retract the excessively long probe signal transmission line 2202, simply rotate the rotating block 311 to make the pawl 307 disengage from the ratchet 305. The winding roller 302 will then automatically rotate under the elastic restoring force of the reset spring 304.
[0048] Please see Figure 10Each conductive slip ring 309 has two fixedly connected stabilizing posts 310 at its rotating end. The top of each stabilizing post 310 is fixedly connected to the inner wall of the winding roller 302. The stabilizing posts 310 are used to fix the rotating end of the conductive slip ring 309 to the winding roller 302, ensuring that the rotating end of the conductive slip ring 309 can rotate synchronously and stably during the rotation of the winding roller 302. This ensures that the signal transmission between the probe signal transmission line 2202 and the host signal transmission line 15 remains unobstructed, and also prevents the winding roller 302 from pulling the fixed end of the probe signal transmission line 2202 during the rotation.
[0049] Please see Figure 9 An elastic plate 308 is fixedly connected to the inner wall of the storage cylinder 301. The outer surface of the elastic plate 308 is in contact with the outer surface of the pawl 307. The elastic plate 308 is made of highly elastic manganese steel. One end of it is fixed to the inner wall of the storage cylinder 301, and the other end extends naturally and always closely abuts against the outer surface of the pawl 307, providing continuous elastic pressure to the pawl 307 and ensuring that the pawl 307 can always accurately engage with the tooth groove of the ratchet 305 in non-human operation.
[0050] The specific implementation of this embodiment is as follows: After the monitoring work is completed, the monitoring personnel can rotate the rotating block 311, which drives the pawl 307 to overcome the elastic resistance of the elastic plate 308 and rotate upward through the rotating shaft 306, so that the pawl and the ratchet 305 are disengaged. At this time, the winding roller 302 begins to rotate in the opposite direction under the elastic restoring force of the reset spring 304, and orderly winds the previously pulled-out probe signal transmission line 2202 back onto the surface of the winding roller 302. During this process, since the rotating end of the conductive slip ring 309 is fixedly connected to the winding roller 302 through the stabilizing post 310, it will rotate synchronously with the winding roller 302. The fixed end of the conductive slip ring 309 remains stationary and connected to the host signal transmission line 15, thereby ensuring the continuity and stability of the probe signal transmission line 2202 during the winding process. It prevents the fixed end of the probe signal transmission line 2202 connected to the host signal transmission line 15 from being pulled due to rotation. After the cable is wound up, the rotating block 311 is released, and the elastic pressure of the elastic sheet 308 will push the pawl 307 to re-engage with the tooth groove of the ratchet 305, preventing the winding roller 302 from rotating on its own when not in operation. This achieves the storage and fixation of the probe signal transmission line 2202, preventing it from becoming scattered or being accidentally pulled.
[0051] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.
[0052] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A crack monitoring device for FRP-reinforced concrete beams, comprising a main body (1), characterized in that: The main body (1) includes an ultrasonic detector host body (11), a host display screen (12) is fixedly connected to the upper surface of the ultrasonic detector host body (11), two edge-protecting pads (13) are fixedly connected to the outer surface of the ultrasonic detector host body (11), two fixing blocks (14) are fixedly connected to the outer surface of the ultrasonic detector host body (11), two host signal transmission lines (15) are fixedly installed on the upper surface of the ultrasonic detector host body (11), and a fixing adjustment mechanism (2) is provided on the outer side of the ultrasonic detector host body (11). The fixing and adjusting mechanism (2) includes a position fixing unit (21), which is located on the outside of the main body (11) of the ultrasonic detector. The position fixing unit (21) is used to fix the probe firmly in the preset monitoring position. The fixed adjustment mechanism (2) further includes a position adjustment unit (22), which is located inside the position fixing unit (21) and is used to adjust the monitoring position of the transmitter and receiver; A cable organizing mechanism (3) is provided on the outside of the position fixing unit (21). The cable organizing mechanism (3) is located on the outside of the position fixing unit (21) and is used to organize and fix the cables in an orderly manner.
2. The FRP-reinforced concrete beam crack monitoring device according to claim 1, characterized in that: The position fixing unit (21) includes two docking blocks (2101). A fixing frame (2102) is slidably connected to the inner walls of the two docking blocks (2101). A support frame (2103) is fixedly connected to the upper surface of the fixing frame (2102). A multi-port ring pipe (2105) is fixedly connected to the outer surface of the fixing frame (2102). Vacuum suction heads (2106) arranged at equal intervals are fixedly connected to the outer surface of the multi-port ring pipe (2105). A negative pressure pipe (2104) is fixedly connected to the outer surface of the support frame (2103). A vacuum pump (2108) is fixedly connected to the left side of the fixing frame (2102). A three-way pipe (2109) is fixedly connected to the input end of the vacuum pump (2108). One input end of the three-way pipe (2109) is fixedly connected to the output end of the negative pressure pipe (2104). The other input end of the three-way pipe (2109) is fixedly connected to the output end of the multi-way ring pipe (2105). The outer surface of the negative pressure pipe (2104) is fixedly connected to the equidistantly arranged limiting pipes (2116). The outer surface of each limiting pipe (2116) is fixedly connected to the inner wall of the support frame (2103). The inner wall of each limiting pipe (2116) is slidably connected to a piston-type lifting rod (2112). The bottom ends of several piston-type lifting rods (2112) are fixedly connected to a limiting pressure plate (2113). The outer surface of the limiting pressure plate (2113) is slidably connected to the inner wall of the support frame (2103). The upper surface of the limiting pressure plate (2113) is fixedly connected to the equidistantly arranged first springs (2114). The top end of each first spring (2114) is fixedly connected to the inner top wall of the support frame (2103).
3. The FRP-reinforced concrete beam crack monitoring device according to claim 2, characterized in that: Each of the mating blocks (2101) has a threaded post (2107) threaded to its inner wall, and the outer surface of each of the threaded posts (2107) is threaded to the inner wall of the fixing frame (2102).
4. The FRP-reinforced concrete beam crack monitoring device according to claim 2, characterized in that: The output end of the multi-pass loop pipe (2105) is fixedly connected to the first solenoid valve (2110), and the output end of the negative pressure pipe (2104) is fixedly connected to the second solenoid valve (2111).
5. The FRP-reinforced concrete beam crack monitoring device according to claim 2, characterized in that: Each of the vacuum nozzles (2106) is fixedly connected to a soft pad (2115) at the end away from the multi-pass ring tube (2105), and the soft pad (2115) and the vacuum nozzle (2106) are located above and below the fixing frame (2102).
6. The FRP-reinforced concrete beam crack monitoring device according to claim 2, characterized in that: The position adjustment unit (22) includes two sliding plates (2201). The outer surface of each sliding plate (2201) is slidably connected to the inner wall of the fixing frame (2102). The upper surface of each sliding plate (2201) is in contact with the bottom surface of the limiting pressure plate (2113). The inner wall of the fixing frame (2102) is slidably connected to a position adjustment frame (2203). The inner wall of each position adjustment frame (2203) is fixedly connected to four fixing cylinders (22... 04), each of the fixed cylinders (2204) has a telescopic rod (2205) slidably connected to its inner wall. A fixed plate (2206) is fixedly connected to the end of each telescopic rod (2205) away from the position adjustment frame (2203). A monitoring probe (2207) is fixedly connected to the inner wall of each fixed plate (2206). A probe signal transmission line (2202) is fixedly installed on the outer surface of each monitoring probe (2207). Each of the telescopic rods (2204) has a telescopic rod (2205) slidably connected to its inner wall. 05) A connecting rod (2210) is fixedly connected to one end of each connecting rod (2210) near the position adjustment frame (2203). The outer surface of each connecting rod (2210) is slidably connected to the inner wall of the fixed cylinder (2204). An adsorption plate (2211) is fixedly connected to one end of each connecting rod (2210) near the position adjustment frame (2203). A second spring (2209) is fixedly connected to one end of each telescopic rod (2205) near the position adjustment frame (2203). The end of each second spring (2209) away from the telescopic rod (2205) is fixedly connected to the inner wall of the fixed cylinder (2204). Each position adjustment frame (2203) is fixedly connected to two fixed frames (2208) on the side away from the fixed plate (2206). The upper surface of each fixed frame (2208) is fixedly connected to the bottom surface of the sliding plate (2201). An electromagnet (2212) is fixedly connected to the inner wall of each fixed frame (2208).
7. The FRP-reinforced concrete beam crack monitoring device according to claim 6, characterized in that: The cable organizing mechanism (3) includes a storage cylinder (301). The outer surface of each docking block (2101) is fixedly connected to the outer surface of the storage cylinder (301). The outer surface of each fixing block (14) is fixedly connected to the outer surface of the storage cylinder (301). A winding roller (302) is rotatably connected to the inner wall of the storage cylinder (301). Each probe signal transmission line (2202) is wound around the surface of the winding roller (302). Both ends of the winding roller (302) are rotatably connected to a closed cylinder (303). The outer surface of each closed cylinder (303) is fixedly connected to the inner wall of the storage cylinder (301). A reset coil spring (304) is fixedly connected to the inner wall of each closed cylinder (303). The inner surface of each reset coil spring (304) is... The coil is fixedly connected to the outer surface of the winding roller (302). A ratchet (305) is fixedly connected to the right end of the winding roller (302). A rotating shaft (306) is rotatably connected to the inner wall of the storage cylinder (301). A pawl (307) is fixedly connected to the outer surface of the rotating shaft (306). The outer surface of the pawl (307) is in contact with the outer surface of the ratchet (305). Two conductive slip rings (309) are fixedly connected to the outer surface of the storage cylinder (301). One end of each probe signal transmission line (2202) near the storage cylinder (301) is fixedly connected to the rotating end of the conductive slip ring (309). One end of each host signal transmission line (15) near the storage cylinder (301) is fixedly connected to the fixed end of the conductive slip ring (309).
8. The FRP-reinforced concrete beam crack monitoring device according to claim 7, characterized in that: A rotating block (311) is fixedly connected to the right end of the rotating shaft (306), and anti-slip grooves (312) are arranged at equal intervals on the outer surface of the rotating block (311).
9. The FRP-reinforced concrete beam crack monitoring device according to claim 7, characterized in that: Each of the conductive slip rings (309) has two fixed posts (310) fixedly connected to its rotating end, and the top of each of the fixed posts (310) is fixedly connected to the inner wall of the winding roller (302).
10. The FRP-reinforced concrete beam crack monitoring device according to claim 7, characterized in that: An elastic sheet (308) is fixedly connected to the inner wall of the storage tube (301), and the outer surface of the elastic sheet (308) is in contact with the outer surface of the pawl (307).