Beam body stress distribution type monitoring device and working method thereof

Abstract

The application relates to the technical field of monitoring, and discloses a beam body stress distributed monitoring device and a working method thereof, which comprises a circuit connection plate, a control button, a signal transferer, a monitoring host and a detection tube pre-embedded in the beam body. In the application, the extrusion of the gravity strip makes the movable rod push the hydraulic pressure of the hydraulic device, the hydraulic pressure data monitored by the four annular detectors are transmitted to the monitoring host, and the shaking direction and the shaking intensity of the gravity strip are monitored, the comprehensiveness of stress monitoring is realized, when a crack appears in the beam body, the shell stretches the rubber ring, the current enters the adjacent detector after being blocked on the resistance ring, the voltage change is transmitted to the monitoring host, the two kinds of beam body stresses are monitored through the detection mechanism and the connecting mechanism, the multi-parameter integration effect is realized, and the situation that the monitoring is disconnected is avoided.

Description

Technical Field

[0001] This invention relates to the field of monitoring technology, specifically to a distributed monitoring device for beam stress and its working method. Background Technology

[0002] Traditional bridge structural stress monitoring methods primarily employ discrete monitoring points. This involves installing stress sensors at key locations on the bridge beams and periodically measuring and collecting data. Distributed monitoring devices, on the other hand, utilize optical fibers as sensors. These fibers are uniformly laid or embedded within the concrete of the bridge beams. The fibers experience corresponding forces on the beam surface, generating an optical signal that is fed back to the monitoring host at the speed of light. The host then identifies and processes this signal to determine the magnitude and relative location of the external forces acting on the bridge. However, in distributed fiber optic monitoring, damage at one location can easily cause a break in the fiber, interrupting monitoring. Furthermore, when monitoring the sway of the bridge beams, optical fibers can only detect the amplitude of the sway, not its direction, resulting in insufficient comprehensive monitoring. Summary of the Invention

[0003] This invention provides a distributed monitoring device for beam stress and its working method, which overcomes the shortcomings described in the background art.

[0004] The technical solution adopted by this invention to solve its technical problem is:

[0005] A distributed beam stress monitoring device includes a circuit connection plate, a control button, a signal transferor, a monitoring host, and detection tubes distributed and embedded in the beam. The detection tubes are electrically connected to the inside of the signal transferor, and the signal transferor is electrically connected to the inside of the circuit connection plate. The control button and the circuit connection plate are located on the same side of the monitoring host.

[0006] The detection tube is equipped with a detection mechanism, a connecting mechanism, a convex block, a shell, and a gravity strip. The detection mechanism is located inside the shell, and the connecting mechanism is located inside the shell. The left and right sides of the connecting mechanism are electrically connected to the detection mechanism. The convex block is arranged in a ring on the outside of the shell. The gravity strip is located on the central axis of the shell. The detection mechanism is arranged in a ring on the inside of the shell, and the detection mechanism is arranged at intervals with the connecting mechanism. When the beam is stressed by pressing against the outside of the gravity strip, the shell squeezes or stretches the connecting mechanism, and the gravity strip squeezes the detection mechanism.

[0007] A preferred technical solution: The detection mechanism includes a connecting ring, a support block, a spring, a movable rod, a hydraulic actuator, and a detector. The connecting ring is located outside the gravity bar, and the movable rod slides within the connecting ring. The detector and the hydraulic actuator are located within the support block, which is located inside the outer casing. The movable rod is hydraulically pushed at the output end of the hydraulic actuator, and the hydraulic pressure of the hydraulic actuator is monitored by the detector. The spring is located outside the movable rod, and its two ends press against the connecting ring and the hydraulic actuator, respectively. The four detectors arranged in a ring are connected in parallel. When the gravity bar sways, the movable rod is moved horizontally through the connecting ring.

[0008] A preferred technical solution: The connecting ring is provided with an outer ring, a limiting rod and an inner ring. The outer ring and the inner ring are rotated by ball bearings. The limiting rod is provided on both sides of the movable rod and is limited to circumferential movement inside the outer ring. The inner ring is provided outside the gravity bar. When the gravity bar is tilted, it drives the two movable rods to move through the outer ring.

[0009] A preferred technical solution: The connecting mechanism includes a movable structure, a hollow tube, a rubber ring, and a resistor ring. The hollow tube is disposed between the detector and the movable structure. The movable structure is fixed inside the outer shell. The rubber ring is disposed between the outer shells, and the resistor ring is fixed inside the rubber ring. The movable structure moves at both ends of the resistor ring. When the outer shell is stretched, the two movable structures move in opposite directions on the resistor ring and transmit power through the hollow tube. A data line is disposed inside the hollow tube. The data line passes through the movable structure and the resistor ring, and the two ends of the data line are respectively connected to two adjacent detectors.

[0010] A preferred technical solution: The movable structure includes a plastic block, a conductive plate, a rubber plate, a connecting block, a copper block, and a hollow channel. The plastic block is disposed on one side of the conductive plate, and the rubber plate is attached to the inner side of the plastic block. A circular block is disposed on the inner side of the conductive plate, which presses against the resistor ring. The hollow channel is located in the middle of the copper block. The connecting block is disposed at the lower end of the copper block and is fixed to the inner side of the outer shell. Two conductive plates are provided, and the conductive plates are symmetrically distributed on the side of the copper block.

[0011] A method for operating a distributed beam stress monitoring device, applied to the aforementioned distributed beam stress monitoring device, includes the following specific steps:

[0012] S1: Multiple detection tubes are installed at various parts of the beam. After the monitoring host is turned on, the signal transmitted by the detection tubes is received through the signal transfer device. The signal enters the monitoring host for processing and monitoring through the line connection board.

[0013] S2: When the detection tube is preset in the beam, the pressure value of the detection mechanism needs to be confirmed when the gravity bar is stationary. When the gravity bar shakes and the pressure changes, the signal is transmitted through the detector connected to the data line.

[0014] S3: When the beam sways, the stress generated by the beam causes the gravity bar to sway, and then the gravity bar squeezes the movable rod through the connecting ring. After being squeezed, the movable rod moves horizontally, so the movable rod moves hydraulically in the hydraulic device. When the hydraulic device moves under the pressure of hydraulic pressure, the pressure value is detected by the detector. The four detectors in the ring collect the pressure change information into one of them and transmit it to the signal transfer unit through the data line. The arranged detection mechanism performs pressure detection at each position.

[0015] S4: When the beam breaks, the outer shell moves with the beam, which stretches the rubber ring and causes the two moving structures to move in opposite directions. At this time, the conductive plate in the moving structure moves outside the resistor ring. The current passing through the resistor ring will generate a change in resistance. The change in current is then transmitted to the adjacent detector through the hollow tube and monitored. The change in current is then converted into information about the fracture location and transmitted to the monitoring host.

[0016] Compared with existing technologies, this technical solution has the following advantages:

[0017] In this invention, when the beam sways, the gravity bar moves, causing it to compress the movable rod. This compression forces the movable rod to hydraulically push the hydraulic device, which in turn drives the movable rod through the outer ring within the connecting ring. Under the elastic reset of the spring, the movable rod continuously and repeatedly pushes the hydraulic device, and the hydraulic pressure is monitored by detectors. At this time, the hydraulic pressure data monitored by the four detectors in the ring is transmitted to the monitoring host. The monitoring host processes the hydraulic pressure information and monitors the swaying direction and intensity of the gravity bar, achieving comprehensive stress monitoring.

[0018] In this invention, when a crack appears in the beam, the outer shell stretches the rubber ring, causing two adjacent moving structures to move in opposite directions outside the resistance ring. This allows the hollow tube coil to carry current through the moving structure. After the current encounters some resistance on the resistance ring, it enters the adjacent detector. After the moving structure moves in opposite directions, the resistance to the current passing through the resistance ring changes, resulting in a voltage change. This voltage change is monitored inside the detector and transmitted to the monitoring host. The detection mechanism and the connecting mechanism monitor the two types of beam stress, achieving a multi-parameter integrated effect. Furthermore, damage to one part of the outer shell does not affect the monitoring of the detection mechanism and the connecting mechanism at other parts, avoiding monitoring disconnection. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0020] Figure 1 This is an overall diagram of the present invention.

[0021] Figure 2 This is a side view of the detection tube.

[0022] Figure 3 This is a planar schematic diagram of the detection tube.

[0023] Figure 4 This is a plan view of the testing facility.

[0024] Figure 5 This is a side view of the connecting ring.

[0025] Figure 6 This is a side view of the connecting mechanism.

[0026] Figure 7 This is a three-dimensional schematic diagram of the movable structure.

[0027] In the diagram: Circuit connection board-1, detection tube-2, control button-3, signal transferor-4, monitoring host-5, detection mechanism-21, connection mechanism-22, convex block-23, outer shell-24, gravity bar-25, connecting ring-211, support block-212, spring-213, movable rod-214, hydraulic device-215, detector-216, outer ring-11, limit rod-12, inner ring-13, moving structure-221, hollow tube-222, rubber ring-223, resistor ring-224, plastic block-41, conductive plate-42, rubber plate-43, connecting block-44, copper block-45, hollow channel-46. Detailed Implementation

[0028] like Figures 1 to 7 As shown, the present invention proposes a distributed beam stress monitoring device, including a line connection plate 1, a control button 3, a signal transferor 4, a monitoring host 5, and detection tubes 2 distributed and embedded in the beam. The detection tubes 2 are electrically connected to the inside of the signal transferor 4, and the signal transferor 4 is electrically connected to the inside of the line connection plate 1. The control button 3 and the line connection plate 1 are located on the same side of the monitoring host 5.

[0029] The detection tube 2 is equipped with a detection mechanism 21, a connecting mechanism 22, a convex block 23, a shell 24, and a gravity bar 25. The detection mechanism 21 is located inside the shell 24, and the connecting mechanism 22 is located inside the shell 24. The left and right sides of the connecting mechanism 22 are electrically connected to the detection mechanism 21. The convex block 23 is arranged in a ring on the outside of the shell 24. The gravity bar 25 is located on the central axis of the shell 24. The detection mechanism 21 is arranged in a ring on the inside of the shell 24, and the detection mechanism 21 is arranged at intervals from the connecting mechanism 22. When the beam is stressed by pressing against the outside of the gravity bar 25, the shell 24 squeezes or stretches the connecting mechanism 22, and the gravity bar 25 squeezes the detection mechanism 21.

[0030] The detection mechanism 21 includes a connecting ring 211, a support block 212, a spring 213, a movable rod 214, a hydraulic actuator 215, and a detector 216. The connecting ring 211 is located outside the gravity bar 25, and the movable rod 214 slides within the connecting ring 211. The detector 216 and the hydraulic actuator 215 are located within the support block 212, which is located inside the outer casing 24. The movable rod 214 is hydraulically pushed at the output end of the hydraulic actuator 215, and the hydraulic pressure of the hydraulic actuator 215 is monitored by the detector 216. The spring 213 is located outside the movable rod 214, and its two ends press against the connecting ring 211 and the hydraulic actuator 215, respectively. The four detectors 216 arranged in a ring are connected in parallel. When the gravity bar 25 sways, the movable rod 214 is moved horizontally through the connecting ring 211.

[0031] Furthermore, the outer side of the detection tube 2 near the signal transferor 4 is not provided with a protruding block 23, and the detector 216 is composed of three parts: a pressure monitor, a data collector, and a voltage sensor. The pressure monitor mainly monitors the hydraulic pressure of the hydraulic unit 215, the data collector mainly collects the pressure data of the detectors 216 arranged along the outer shell 24 and transmits it to the signal transferor 4, and the voltage change will occur due to the tensile displacement between two adjacent detectors 216. The voltage sensor mainly collects the voltage change and transmits it to the signal transferor 4.

[0032] The connecting ring 211 is provided with an outer ring 11, a limiting rod 12 and an inner ring 13. The outer ring 11 and the inner ring 13 are rotated by ball bearings. The limiting rod 12 is arranged on both sides of the movable rod 214 and is limited to the circumferential movement inside the outer ring 11. The inner ring 13 is arranged outside the gravity bar 25. When the gravity bar 25 is tilted, it drives the two movable rods 214 to move through the outer ring 11.

[0033] Furthermore, when the gravity bar 25 sways, it causes the inner ring 13 to press against the outer ring 11. At this time, the four limiting rods 12 on the outer side move in a circular motion around the outer ring 11, ensuring that the swaying of the gravity bar 25 can be detected immediately. After the swaying ends, it is elastically reset by the spring 213 to prevent the gravity bar 25 from stopping and being difficult to detect after the swaying. It is necessary to explain that in the absence of external force, the gravity bar 25 remains stationary under the elasticity of the four outer springs 213.

[0034] The connecting mechanism 22 includes a movable structure 221, a hollow tube 222, a rubber ring 223, and a resistor ring 224. The hollow tube 222 is disposed between the detector 216 and the movable structure 221. The movable structure 221 is fixed inside the outer shell 24. The rubber ring 223 is disposed between the outer shell 24, and the resistor ring 224 is fixed inside the rubber ring 223. The movable structure 221 moves at both ends of the resistor ring 224. When the outer shell 24 is stretched, the two movable structures 221 move in opposite directions on the resistor ring 224 and transmit power through the hollow tube 222. A data line is disposed inside the hollow tube 222. The data line passes through the movable structure 221 and the resistor ring 224, and the two ends of the data line are respectively connected to two adjacent detectors 216.

[0035] Furthermore, a coil is installed inside the hollow tube 222, with the two ends of the coil connected between the moving structure 221 and the detector 216. When the moving structure 221 rotates, the hollow tube 222 is slightly compressed, and the stability of the circuit is not affected by the coil.

[0036] The movable structure 221 includes a plastic block 41, a conductive plate 42, a rubber plate 43, a connecting block 44, a copper block 45, and a hollow channel 46. The plastic block 41 is located on one side of the conductive plate 42, and the rubber plate 43 is attached to the inner side of the plastic block 41. A circular block is provided on the inner side of the conductive plate 42, which presses against the resistor ring 224. The hollow channel 46 is located in the middle of the copper block 45. The connecting block 44 is located at the lower end of the copper block 45 and is fixed to the inner side of the outer shell 24. There are two conductive plates 42, which are symmetrically distributed on the side of the copper block 45.

[0037] When the outer shell 24 bends, the moving structure 221 rotates and moves accordingly, and the conductive plate 42 squeezes the rubber plate 43. Under the support of the plastic block 41, the conductive plate 42 elastically contacts the outside of the resistor ring 224 to prevent the moving structure 221 from detaching from the contact resistor ring 224.

[0038] A method for operating a distributed beam stress monitoring device, applied to the aforementioned distributed beam stress monitoring device, includes the following specific steps:

[0039] S1: Multiple detection tubes 2 are installed at various parts of the beam. After the monitoring host 5 is turned on, the signal transmitted by the detection tubes 2 is received by the signal transferor 4. The signal enters the monitoring host 5 through the line connection board 1 for processing and monitoring.

[0040] S2: When the detection tube 2 is preset in the beam, the pressure value of the detection mechanism 21 needs to be confirmed when the gravity strip 25 is stationary. When the gravity strip 25 shakes and the pressure changes, the signal is transmitted through the data line connected to the detector 216.

[0041] S3: When the beam sways, the stress generated by the beam causes the gravity bar 25 to sway. Then, the gravity bar 25 squeezes the movable rod 214 through the connecting ring 211. After being squeezed, the movable rod 214 moves horizontally, so that the movable rod 214 moves hydraulically in the hydraulic device 215. When the hydraulic device 215 is subjected to hydraulic pressure, the pressure value is detected by the detector 216. The four detectors 216 in the ring collect the pressure change information into one of them and transmit it to the signal transferor 4 through the data line. The arranged detection mechanism 21 performs pressure detection at each position.

[0042] S4: When the beam breaks, the outer shell 24 moves with the beam, which stretches the rubber ring 223 and drives the two moving structures 221 to move in opposite directions. At this time, the conductive plate 42 in the moving structure 221 moves outside the resistor ring 224. The current passing through the resistor ring 224 will generate a change in resistance. The change in current is then transmitted through the hollow tube 222 to the adjacent detector 216 for monitoring. Subsequently, the change in current is converted into information about the fracture location and transmitted to the monitoring host 5.

[0043] In this invention, the detection tube 2 is pre-installed inside the beam, and the detection mechanism 21 inside the detection tube 2 is arranged along the outer shell 24. When the beam shakes, the outer shell 24 moves through the convex block 23. Under the shaking of the beam, the gravity bar 25 moves and squeezes the movable rod 214. The squeezing of the gravity bar 25 causes the movable rod 214 to hydraulically push the hydraulic device 215. Then, the outer ring 11 inside the connecting ring 211 drives the movable rod 214 to move. Under the elastic reset of the spring 213, the movable rod 214 continuously and repeatedly pushes the hydraulic device 215. The hydraulic pressure is monitored by the detector 216. At this time, the hydraulic pressure data monitored by the four ring detectors 216 is transmitted to the monitoring host 5. The monitoring host 5 processes the hydraulic pressure information and monitors the shaking direction and shaking force of the gravity bar 25 to achieve comprehensive stress monitoring.

[0044] In this invention, when a crack appears in the beam, the outer shell 24 stretches the rubber ring 223, causing two adjacent moving structures 221 to move in opposite directions outside the resistor ring 224. This allows current to flow through the coil of the hollow tube 222 via the moving structure 221. After the current encounters some resistance on the resistor ring 224, it enters the adjacent detector 216. After the moving structure 221 moves in opposite directions, the resistance to the current passing through the resistor ring 224 changes, resulting in a voltage change. This voltage change is monitored in the detector 216 and transmitted to the monitoring host 5. The voltage change indicates that the outer shell 24 is following the beam. The location of the fracture is monitored to detect the stress in the beam. When the moving structure 221 moves, the conductive plate 42 elastically contacts the moving rod 214 through the rubber plate 43, allowing the conductive plate 42 to conduct electricity through the copper block 45. This prevents the moving structure 221 from detaching from the resistor ring 224 during movement, thereby monitoring the location of the beam fracture. The detection mechanism 21 and the connecting mechanism 22 monitor two types of beam stress, achieving a multi-parameter integrated effect. Furthermore, damage to one location of the outer shell 24 does not affect the monitoring of the detection mechanism 21 and the connecting mechanism 22 at other locations, avoiding monitoring disconnection.

[0045] The above description is merely a preferred embodiment of the present invention, and therefore should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made in accordance with the scope of the patent and the contents of the specification should still fall within the scope of the present invention.

Claims

1. A distributed monitoring device for beam stress, characterized in that, It includes a line connection plate (1), a control button (3), a signal transfer device (4), a monitoring host (5), and detection tubes (2) embedded in the beam. The detection tubes (2) are electrically connected to the inside of the signal transfer device (4), and the signal transfer device (4) is electrically connected to the inside of the line connection plate (1). The control button (3) and the line connection plate (1) are located on the same side of the monitoring host (5). The detection tube (2) is provided with a detection mechanism (21), a connecting mechanism (22), a convex block (23), a shell (24), and a gravity bar (25). The detection mechanism (21) is located inside the shell (24), the connecting mechanism (22) is located inside the shell (24), and the electrical signals on the left and right sides of the connecting mechanism (22) are connected to the detection mechanism (21). The convex block (23) is arranged in a ring on the outside of the shell (24). The gravity bar (25) is located on the central axis of the shell (24). The detection mechanism (21) is arranged in a ring on the inside of the shell (24), and the detection mechanism (21) is arranged at intervals with the connecting mechanism (22). When the beam generates stress, the shell (24) squeezes or stretches the connecting mechanism (22) and the gravity bar (25) squeezes the detection mechanism (21). The detection mechanism (21) includes a connecting ring (211), a support block (212), a spring (213), a movable rod (214), a hydraulic actuator (215), and a detector (216). The connecting ring (211) is located outside the gravity bar (25), and the movable rod (214) slides within the connecting ring (211). The detector (216) and the hydraulic actuator (215) are located within the support block (212), which is located inside the outer casing (24). The movable rod (214) is hydraulically pushed at the output end of the hydraulic device (215). The hydraulic pressure of the hydraulic device (215) is monitored by the detector (216). The spring (213) is set on the outside of the movable rod (214), and the two ends of the spring (213) are respectively pressed between the connecting ring (211) and the hydraulic device (215). The four detectors (216) distributed in a ring are connected in parallel. When the gravity bar (25) shakes, it drives the movable rod (214) to move through the connecting ring (211). The connecting mechanism (22) includes a movable structure (221), a hollow tube (222), a rubber ring (223), and a resistor ring (224). The hollow tube (222) is positioned between the detector (216) and the movable structure (221). The movable structure (221) is fixed inside the outer shell (24). The rubber ring (223) is positioned between the outer shell (24), and the resistor ring (224) is fixed inside the rubber ring (223). The movable structure (221) moves between the left and right ends of the resistor ring (224). When the outer shell (24) is stretched, the two movable structures (221) move in opposite directions on the resistor ring (224) and transmit power through the hollow tube (222). The hollow tube (222) contains a data line that passes through the movable structure (221) and the resistor ring (224). The two ends of the data line are connected to two adjacent detectors (216).

2. The distributed beam stress monitoring device according to claim 1, characterized in that, The connecting ring (211) is provided with an outer ring (11), a limiting rod (12) and an inner ring (13). The outer ring (11) and the inner ring (13) rotate through ball bearings. The limiting rod (12) is located on both sides of the movable rod (214), and the limiting rod (12) is limited to a circular motion inside the outer ring (11). The inner ring (13) is located outside the gravity bar (25). When the gravity bar (25) tilts, it drives the two movable rods (214) to move through the outer ring (11).

3. The distributed beam stress monitoring device according to claim 2, characterized in that, The movable structure (221) includes a plastic block (41), a conductive plate (42), a rubber plate (43), a connecting block (44), a copper block (45), and a hollow channel (46). The plastic block (41) is located on one side of the conductive plate (42), and the rubber plate (43) is attached to the inner side of the plastic block (41). A circular block is provided on the inner side of the conductive plate (42), which presses against the resistor ring (224). The hollow channel (46) is located in the middle of the copper block (45). The connecting block (44) is located at the lower end of the copper block (45) and is fixed to the inner side of the outer shell (24). There are two conductive plates (42), which are symmetrically distributed on the side of the copper block (45).

4. A method for operating a distributed beam stress monitoring device, applied to the distributed beam stress monitoring device of claim 3, characterized in that, The working method includes the following specific steps: S1: Multiple detection tubes (2) are installed in various parts of the beam. After the monitoring host (5) is turned on, the signal transmitted by the detection tubes (2) is received by the signal transfer device (4). The signal enters the monitoring host (5) through the line connection board (1) for processing and monitoring. S2: When the detection tube (2) is preset in the beam, the pressure value of the detection mechanism (21) needs to be confirmed when the gravity strip (25) is in a static state. When the gravity strip (25) shakes and the pressure changes, the signal is transmitted through the data line connected to the detector (216). S3: When the beam sways, the stress generated by the beam causes the gravity bar (25) to sway, and then the gravity bar (25) squeezes the movable rod (214) through the connecting ring (211). After being squeezed, the movable rod (214) moves horizontally, so the movable rod (214) moves hydraulically in the hydraulic device (215). When the hydraulic device (215) is subjected to hydraulic pressure, the pressure value is detected by the detector (216). The four detectors (216) in the ring collect the pressure change information into one of them and transmit it to the signal transfer device (4) through the data line. The arranged detection mechanism (21) performs pressure detection at each position. S4: When the beam breaks, the outer shell (24) moves with the beam, thus stretching the rubber ring (223) and causing the two moving structures (221) to move in opposite directions. At this time, the conductive plate (42) in the moving structure (221) moves outside the resistor ring (224). The current passing through the resistor ring (224) will generate a change in resistance. The change in current is then transmitted through the hollow tube (222) to the adjacent detector (216) for monitoring. Subsequently, the change in current is converted into information about the fracture location and transmitted to the monitoring host (5).

Images