Stress monitoring device for bridge expansion joint and monitoring method thereof

Abstract

The invention provides a stress monitoring device for a bridge expansion joint and a monitoring method of the stress monitoring device so as to solve the problem that an existing bridge expansion joint cannot be dynamically monitored in real time. The stress monitoring device capable of being used for the bridge expansion joint comprises a pre-embedded assembly and a data aggregation end arranged on one side of the bridge expansion joint, and the pre-embedded assembly is connected with the data aggregation end through a wire; the stress analysis end is arranged at the far end, and the data aggregation end is in communication connection with the stress analysis end; therefore, the stress condition of the bridge expansion joint can be monitored in real time, so that the driving safety is ensured, and the maintenance work of the bridge expansion joint can be carried out at the first time once the stress change is found out and exceeds the normal range.

Description

Technical Field

[0001] The invention belongs to the technical field of bridge expansion joint monitoring, and in particular relates to a stress monitoring device and a monitoring method thereof that can be used for bridge expansion joints. Background Art

[0002] Bridges are open-air permanent structures that cross obstacles such as rivers, deep valleys and built roads. Due to factors such as temperature changes, concrete shrinkage and creep, and changing loads, the beam ends of the bridge will creep. To adapt to this characteristic of the bridge structure, it is necessary to set expansion joints that can deform freely in the bridge structure and between the beam ends and the back wall of the abutment to ensure a smooth bridge deck and protect the structure.

[0003] The expansion joints are required to be able to freely expand and contract in both directions parallel and perpendicular to the bridge axis, be firm and reliable, and be smooth without sudden jumps or noise when vehicles pass through them; they must be able to prevent rainwater and garbage and soil from seeping in and blocking them; and they must be easy and convenient to install, inspect, maintain, and remove dirt. Where expansion joints are set, the railings and the bridge deck pavement must be disconnected.

[0004] Existing bridge expansion joints lack long-term monitoring equipment, and only quality inspection is carried out during project acceptance. In the subsequent use of the bridge, regular inspection and supervision are carried out, and it is impossible to effectively monitor the bridge expansion joints in real time; therefore, a stress monitoring device and monitoring method that can be used for bridge expansion joints are needed to solve this problem. Summary of the invention

[0005] The object of the present invention is to provide a stress monitoring device and a monitoring method thereof that can be used for bridge expansion joints, so as to solve the problem that existing bridge expansion joints cannot be monitored in real time and dynamically.

[0006] To achieve the above-mentioned purpose, the present invention provides a stress monitoring device that can be used for bridge expansion joints, including a pre-embedded component, a data aggregation end arranged on one side of the bridge expansion joint, and the pre-embedded component is connected to the data aggregation end through a wire; and a stress analysis end is arranged at the far end, and the data aggregation end is communicatively connected with the stress analysis end.

[0007] Furthermore, the embedded component includes a wire sleeve, a plurality of wires are arranged in the wire sleeve, a plurality of wire through-holes are arranged on the wire sleeve, one end of the wire is passed through the wire through-hole and connected to a monitoring sensor, and a waterproof sealant is also arranged at the wire through-hole; the other end of the wire is electrically connected to the data aggregation end after passing through the wire sleeve.

[0008] Furthermore, the data aggregation end includes a shell, a plurality of wiring sockets are provided on the shell, a communication antenna is also provided on the shell, a main body integrated module is provided inside the shell, and the main body integrated module is electrically connected to the communication antenna and the wiring sockets respectively; a solar cell panel is also provided outside the shell, and the solar cell panel is electrically connected to the main body integrated module.

[0009] Furthermore, a wiring plug is provided at the other end of the wire, and the wiring plug matches the wiring socket.

[0010] Furthermore, the wiring socket includes a socket body, a wiring jack is provided on the socket body, and wiring card slots are provided on the left and right sides of the socket body; the wiring plug includes a plug shell, a wiring electrode rod is provided in the plug shell, and wiring card blocks are provided on the left and right sides of the inner wall of the plug shell; the wiring electrode rod corresponds to the wiring jack, the wiring card block corresponds to the wiring card slot, and the plug shell corresponds to the socket body.

[0011] Furthermore, the main integrated module includes a control module, a power module, an AD conversion module, and a communication module. The control module is electrically connected to the AD conversion module, the AD conversion module is electrically connected to the wiring socket, the control module is also electrically connected to the communication module, the communication module is electrically connected to the communication antenna, the power module is respectively connected to the control module, the AD conversion module, and the communication module to provide working power to the control module, the AD conversion module, and the communication module, and the power module is also electrically connected to the solar panel to convert solar energy into electrical energy and store it.

[0012] Furthermore, the stress analysis end is a PC.

[0013] Furthermore, a stress monitoring method for a bridge expansion joint comprises the following steps:

[0014] S1: Test the embedded components to ensure that they are fault-free;

[0015] S2: During the construction of the bridge expansion joint, the embedded components are embedded into the bridge body simultaneously, and the monitoring sensors of the embedded components are set at the bottom of the expansion steel plate of the bridge expansion joint and other locations that need to be tested, and the embedded components are checked again to see if they are normal;

[0016] S3: After the bridge is constructed, the data aggregation end is set on one side of the bridge, and the wiring plug on the embedded component is connected to the wiring socket on the data aggregation end; the solar panel is set at a suitable position of the bridge, and the solar panel is electrically connected to the data aggregation end through a wire;

[0017] S4: Start the data aggregation end to start real-time monitoring of the bridge expansion joint. The data aggregation end receives the bridge expansion joint stress data collected by the embedded components and sends it to the remote stress analysis end.

[0018] The advantages of the present invention are as follows: the present invention provides a stress monitoring device and a monitoring method that can be used for expansion joints of bridges. By pre-buried components near the expansion joints during the bridge construction phase, after the bridge is built, a data aggregation end is set on one side of the bridge, the pre-buried components are connected to the data aggregation end, and the data aggregation end forwards the real-time data of the expansion joints of the bridge collected by the pre-buried components to a remote stress analysis end; in this way, the stress condition of the expansion joints of the bridges can be monitored in real time, thereby ensuring driving safety. Once stress changes are found to be beyond the normal range, the expansion joints of the bridges can be inspected and repaired as soon as possible.

[0019] The present invention is described in detail below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the embedded component of the present invention.

[0021] Figure 2 It is a structural schematic diagram of the data aggregation end of the present invention.

[0022] Figure 3 It is a structural schematic diagram of the wiring socket of the present invention.

[0023] Figure 4 It is an enlarged view of the structure of the wiring plug of the present invention.

[0024] Figure 5 It is a principle block diagram of the main integrated module of the present invention.

[0025] Figure 6 It is a cross-sectional schematic diagram of the embedded component of the present invention embedded in the expansion joint of the bridge.

[0026] Explanation of the reference numerals: 1. Wire sleeve; 2. Wire; 3. Wire penetration; 4. Monitoring sensor; 5. Shell; 6. Wiring socket; 6-1. Socket body; 6-2. Wiring jack; 6-3. Wiring card slot; 7. Wiring plug; 7-1. Plug shell; 7-2. Wiring electrode rod; 7-3. Wiring card block; 8. Main integrated module; 9. Solar panel; 10. Communication antenna. DETAILED DESCRIPTION

[0027] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined purpose, the specific implementation methods, structural features and effects of the present invention are described in detail below in conjunction with the accompanying drawings and embodiments.

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] In the description of the present invention, it is necessary to understand that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "aligned", "overlap", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0030] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features; in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0031] Example 1

[0032] This embodiment provides Figure 1 to Figure 6 A stress monitoring device that can be used for a bridge expansion joint is shown, comprising a pre-embedded component, a data aggregation end arranged on one side of the bridge expansion joint, the pre-embedded component and the data aggregation end being connected via a wire; a stress analysis end arranged at the far end, the data aggregation end being communicatively connected with the stress analysis end; the pre-embedded component is arranged in the direction of the expansion joint, about 40 to 50 cm away from the expansion joint, and the pre-embedded depth is about 15 cm, so that it neither affects the structural strength of the bridge nor the function of the expansion joint.

[0033] Furthermore, the embedded component includes a wire sleeve 1, a plurality of wires 2 are arranged in the wire sleeve 1, a plurality of wire through-holes 3 are arranged on the wire sleeve 1, after one end of the wire 2 passes through the wire through-hole 3, it is connected to a monitoring sensor 4, and a waterproof sealant is also arranged at the wire through-hole 3; after the other end of the wire 2 passes through the wire sleeve 1, it is electrically connected to the data aggregation end.

[0034] Furthermore, the wire sleeve 1 is made of a PVC tube, and a plurality of wire perforations 3 are arranged on its axial side wall so that one end of the wire 2 extends out of the wire perforation 3 from the wire sleeve 1. After one end of the wire 2 extends out of the wire sleeve 1 through the wire perforation 3, a sealant is arranged at the wire perforation 3 to play a waterproof sealing role; one end of the wire 2 extends out of the wire sleeve 1 by about 60 to 75 cm, and a monitoring sensor 4 is arranged at one end of the wire 2. The monitoring sensor 4 is arranged at a position where the expansion joint requires stress monitoring. The monitoring sensor 4 can adopt a piezoelectric ceramic sensor, such as piezoelectric ceramic sensors of models PC10, PCM10, PC16, and PC10D.

[0035] Furthermore, a wiring plug 7 is provided at the other end of the wire 2, and the wiring plug 7 matches the wiring socket 6 described below.

[0036] Specifically, Figure 3 , Figure 4 As shown, the wiring socket 6 includes a socket body 6-1, a wiring jack 6-2 is provided on the socket body 6-1, and wiring card slots 6-3 are provided on the left and right sides of the socket body 6-1; the wiring plug 7 includes a plug shell 7-1, a wiring electrode rod 7-2 is provided in the plug shell 7-1, and wiring card blocks 7-3 are provided on the left and right sides of the inner wall of the plug shell 7-1; the wiring electrode rod 7-2 corresponds to the wiring jack 6-2, the wiring card block 7-3 corresponds to the wiring card slot 6-3, and the plug shell 7-1 corresponds to the socket body 6-1. In actual application, it is only necessary to place the wiring plug 7 opposite to the wiring socket 6 and insert them to achieve the connection between the two.

[0037] Since the data aggregation end is arranged on one side of the bridge, a waterproof gasket can be arranged at the connection between the wiring plug 7 and the wiring socket 6 to enhance the waterproof effect and improve the service life and waterproof effect of the two.

[0038] Further, such as Figure 2 As shown, the data aggregation end includes a shell 5, on which a plurality of wiring sockets 6 are provided, and a communication antenna 10 is also provided on the shell 5. A main body integrated module 8 is provided inside the shell 5, and the main body integrated module 8 is electrically connected to the communication antenna 10 and the wiring sockets 6 respectively; a solar cell panel 9 is also provided outside the shell 5, and the solar cell panel 9 is electrically connected to the main body integrated module 8.

[0039] Furthermore, the main integrated module 8 includes a control module, a power module, an AD conversion module, and a communication module. The control module is electrically connected to the AD conversion module, and the AD conversion module is electrically connected to the wiring socket 6, which is used to electrically connect the control module to the communication module, and the communication module is electrically connected to the communication antenna 10. The power module is respectively connected to the control module, the AD conversion module, and the communication module to provide working power to the control module, the AD conversion module, and the communication module. The power module is also electrically connected to the solar panel 9 to convert solar energy into electrical energy and store it.

[0040] The control module is a microcontroller, whose model is STM32F103RBT6. This model of single-chip microcontroller is a 32-bit MCU microcontroller with an embedded ARM core, ARM Cortex TM -M3 processor is the latest generation of ARM processor for embedded systems.

[0041] The power module is mainly composed of a storage battery and a transformer circuit. The storage battery can store the electric energy converted by the solar panel 9; the transformer circuit can convert the electric energy stored in the storage battery into 5V and 3.3V DC electric energy to meet the working requirements of each functional module.

[0042] The voltage conversion circuit can be constructed using DC-DC step-down chips such as AD110, AD112, AD2320, and AD2330.

[0043] The AD conversion module may adopt the AD conversion module model ICL7109.

[0044] The communication module may adopt a JZX1278-433M radio frequency module, which is a 4G communication module with a transmission distance of about 5 km and a volume of 17.5 mm×17 mm×3 mm, and can be well integrated into the main integrated module 8 .

[0045] Furthermore, the stress analysis end is a PC, and the stress data transmitted by the received data aggregation end is processed (displayed, marked, recorded, compared), etc. through the bridge expansion joint stress monitoring software installed on the PC, so that the monitoring personnel can intuitively observe the stress state of the bridge expansion joint.

[0046] Furthermore, a stress monitoring method for a bridge expansion joint comprises the following steps:

[0047] S1: Test the embedded components to ensure that they are fault-free;

[0048] S2: During the construction of the bridge expansion joint, the embedded components are embedded into the bridge body simultaneously, and the monitoring sensors of the embedded components are set at the bottom of the expansion steel plate of the bridge expansion joint and other locations that need to be tested, and the embedded components are checked again to see if they are normal;

[0049] S3: After the bridge is constructed, the data aggregation end is set on one side of the bridge, and the wiring plug 7 on the embedded component is connected to the wiring socket 6 on the data aggregation end; the solar panel 9 is set at a suitable position of the bridge, and the solar panel 9 is electrically connected to the data aggregation end through a wire;

[0050] S4: Start the data aggregation end to start real-time monitoring of the bridge expansion joint. The data aggregation end receives the bridge expansion joint stress data collected by the embedded components and sends it to the remote stress analysis end.

[0051] In summary, the present invention provides a stress monitoring device and a monitoring method that can be used for expansion joints of bridges. By pre-embedded components near the expansion joints during the bridge construction phase, after the bridge is built, a data aggregation end is set on one side of the bridge, and the pre-embedded components are connected to the data aggregation end. The data aggregation end forwards the real-time data of the expansion joints of the bridge collected by the pre-embedded components to a remote stress analysis end. In this way, the stress conditions of the expansion joints of the bridges can be monitored in real time, thereby ensuring driving safety. Once stress changes are found that exceed the normal range, the expansion joints of the bridges can be inspected and repaired as soon as possible.

[0052] The above contents are further detailed descriptions of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A stress monitoring device that can be used for bridge expansion joints, characterized in that: It includes a pre-embedded component, a data aggregation end arranged on one side of the bridge expansion joint, the pre-embedded component and the data aggregation end are connected through a wire; and a stress analysis end arranged at the far end, the data aggregation end is communicatively connected with the stress analysis end.

2. A stress monitoring device for bridge expansion joints as claimed in claim 1, characterized in that: The embedded component comprises a wire sleeve (1), a plurality of wires (2) are arranged in the wire sleeve (1), a plurality of wire through holes (3) are arranged on the wire sleeve (1), one end of the wire (2) passes through the wire through hole (3) and is connected to a monitoring sensor (4), and a waterproof sealant is also arranged at the wire through hole (3); the other end of the wire (2) passes through the wire sleeve (1) and is electrically connected to a data aggregation end.

3. A stress monitoring device for bridge expansion joints as claimed in claim 1, characterized in that: The data aggregation end comprises a shell (5), a plurality of connection sockets (6) are arranged on the shell (5), a communication antenna (10) is also arranged on the shell (5), a main body integrated module (8) is arranged inside the shell (5), and the main body integrated module (8) is respectively electrically connected to the communication antenna (10) and the connection socket (6); a solar cell panel (9) is also arranged outside the shell (5), and the solar cell panel (9) is electrically connected to the main body integrated module (8).

4. A stress monitoring device for bridge expansion joints as claimed in claim 3, characterized in that: The other end of the wire (2) is provided with a wiring plug (7), and the wiring plug (7) matches the wiring socket (6).

5. A stress monitoring device for bridge expansion joints as claimed in claim 4, characterized in that: The wiring socket (6) comprises a socket body (6-1), the socket body (6-1) is provided with a wiring jack (6-2), and wiring card slots (6-3) are provided on the left and right sides of the socket body (6-1); the wiring plug (7) comprises a plug housing (7-1), a wiring electrode rod (7-2) is provided in the plug housing (7-1), and wiring card blocks (7-3) are provided on the left and right sides of the inner wall of the plug housing (7-1); the wiring electrode rod (7-2) corresponds to the wiring jack (6-2), the wiring card block (7-3) corresponds to the wiring card slot (6-3), and the plug housing (7-1) corresponds to the socket body (6-1).

6. A stress monitoring device for bridge expansion joints as claimed in claim 3, characterized in that: The main body integrated module (8) comprises a control module, a power module, an AD conversion module, and a communication module. The control module is electrically connected to the AD conversion module, the AD conversion module is electrically connected to the wiring socket (6), the control module is also electrically connected to the communication module, and the communication module is electrically connected to the communication antenna (10). The power module is respectively connected to the control module, the AD conversion module, and the communication module to provide working power to the control module, the AD conversion module, and the communication module. The power module is also electrically connected to the solar cell panel (9) to convert solar energy into electrical energy and store it.

7. A stress monitoring device for bridge expansion joints as claimed in claim 1, characterized in that: The stress analysis end is a PC.

8. A stress monitoring method for a bridge expansion joint, characterized in that: The steps include: S1: Test the embedded components to ensure that they are fault-free; S2: During the construction of the bridge expansion joint, the embedded components are embedded into the bridge body simultaneously, and the monitoring sensors of the embedded components are set at the bottom of the expansion steel plate of the bridge expansion joint and other locations that need to be tested, and the embedded components are checked again to see if they are normal; S3: After the construction of the bridge is completed, the data aggregation end is arranged on one side of the bridge, and the wiring plug (7) on the embedded component is connected to the wiring socket (6) on the data aggregation end; the solar cell panel (9) is arranged at a suitable position of the bridge, and the solar cell panel (9) is electrically connected to the data aggregation end through a wire; S4: Start the data aggregation end to start real-time monitoring of the bridge expansion joint. The data aggregation end receives the bridge expansion joint stress data collected by the embedded components and sends it to the remote stress analysis end.

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