Intelligent duct piece prestress reinforcing system based on shape memory alloy

Abstract

The invention discloses an intelligent duct piece prestress reinforcing system based on shape memory alloy, and relates to the field of structural reinforcement, the intelligent duct piece prestress reinforcing system comprises three sets of prestress reinforcing units arranged side by side, each set of prestress reinforcing unit comprises a glass fiber reinforced plastic plate, and a first fixing block and a second fixing block are installed at the two ends of each glass fiber reinforced plastic plate correspondingly; the first fixing block and the second fixing block are respectively mounted on two adjacent duct pieces; a clamping device and an intelligent control device are arranged on the first fixing block, a glass steel plate is clamped and fixed on the clamping device, and the clamping device is electrically connected with the intelligent control device; and a power supply for supplying power to the intelligent control device is mounted on the first fixing block in the middle group of prestress reinforcing units in the three groups of prestress reinforcing units which are arranged side by side. The method is suitable for reinforcing and repairing complex structures such as arc-shaped bridges and tunnels, the strength and durability of the structures can be effectively enhanced, wide application prospects are achieved, and a new solution is provided for the field of structure reinforcing.

Description

Technical Field

[0001] The invention relates to the field of structural reinforcement, and in particular to an intelligent segment prestressed reinforcement system based on shape memory alloy. Background Art

[0002] With the acceleration of urbanization and the continuous advancement of infrastructure construction, the safety and durability of structures such as bridges and tunnels have received increasing attention. Traditional structural reinforcement methods, such as concrete reinforcement and steel plate reinforcement, have disadvantages such as complex construction, long construction period, and great impact on the appearance of the structure. In addition, these methods are more difficult to construct when dealing with complex structural surfaces, such as curved bridges and tunnels, and it is difficult to achieve uniform reinforcement of the structure.

[0003] In recent years, the application of smart materials in the field of structural reinforcement has gradually attracted attention. Shape memory alloy is a smart material with shape memory effect, which can restore its original shape at a specific temperature. By utilizing this property of shape memory alloy, prestressed reinforcement of the structure can be achieved. However, the existing reinforcement systems based on shape memory alloy are mostly manually operated and lack intelligent and automated control methods, resulting in low construction efficiency and difficulty in real-time monitoring and adjustment of the reinforcement effect.

[0004] In addition, the existing system also has deficiencies in temperature control and strain monitoring, and cannot effectively ensure that the heating temperature of the shape memory alloy and the applied prestress meet the design requirements, thus affecting the stability and reliability of the reinforcement effect. Therefore, it is of great practical significance and application value to develop an intelligent and automated intelligent segment prestress reinforcement system based on shape memory alloy to improve construction efficiency and reinforcement effect. Summary of the invention

[0005] The purpose of the present invention is to provide an intelligent segment prestressed reinforcement system based on shape memory alloy to solve the problem of insufficient stability and reliability of the reinforcement system.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions: The present invention provides a smart segment prestressing reinforcement system based on shape memory alloy, comprising three groups of prestressing reinforcement units arranged side by side, each group of the prestressing reinforcement units comprises a glass fiber reinforced plastic plate, a first fixing block and a second fixing block are respectively installed at both ends of the glass fiber reinforced plastic plate, and the first fixing block and the second fixing block are respectively installed on two adjacent segments; The first fixing block is provided with a clamping device and an intelligent control device, the glass fiber reinforced plastic plate is clamped on the clamping device, and the clamping device and the intelligent control device are electrically connected; The three intelligent control devices on the first fixing blocks are electrically connected together in sequence; A power source for supplying power to the intelligent control device is installed on the first fixing block in the prestressed reinforcement unit of the middle group among the three groups of prestressed reinforcement units arranged side by side.

[0007] Optionally, the clamping device includes an upper clamping piece, a lower clamping piece and a connecting clamping piece; A plurality of shape memory alloys are connected through the positioning groove of the first fixed block, the upper clip and the lower clip are clamped on the exposed ends of the plurality of shape memory alloys, the inner end of the shape memory alloy is positioned by the connecting clip, the inner end of the shape memory alloy and one end of the glass fiber reinforced plastic plate are clamped between the connecting clip and the first fixed block, and the connecting clip is locked on the first fixed block by bolts.

[0008] Optionally, the intelligent control device includes: a control chip, a strain acquisition module, a relay module and a temperature control module, the control chip is electrically connected to the strain acquisition module, the relay module and the temperature control module respectively, and the power supply supplies power to the control chip, the strain acquisition module, the relay module and the temperature control module respectively.

[0009] Optionally, the control chip is wirelessly connected to a smart terminal, and the smart terminal includes a mobile phone and / or a computer.

[0010] Optionally, the strain acquisition module is electrically connected to a strain gauge, and a plurality of strain gauges are provided and evenly distributed on the glass fiber reinforced plastic plate.

[0011] Optionally, the relay module includes a plurality of relays, each of which is electrically connected to a piece of the shape memory alloy, so as to achieve independent power-on heating control of different shape memory alloys; the relay is electrically connected to the shape memory alloy via a relay connecting line.

[0012] Optionally, the temperature control module is electrically connected to the shape memory alloy via a shape memory alloy heating connecting wire, and the temperature control module is used to monitor the temperature of the shape memory alloy in real time and feed back the temperature to the control chip.

[0013] Optionally, the power supply is electrically connected to an overload protector, and the power supply supplies power to the intelligent control device through the overload protector.

[0014] Optionally, the intelligent control device on the first fixed block in the prestressed reinforcement unit of the middle group is electrically connected to the intelligent control device on the first fixed block in the prestressed reinforcement unit of the left end group through the left end structural connecting line, and the intelligent control device on the first fixed block in the prestressed reinforcement unit of the middle group is electrically connected to the intelligent control device on the first fixed block in the prestressed reinforcement unit of the right end group through the right end structural connecting line.

[0015] Compared with the prior art, the beneficial technical effects of the present invention are: The control chip of the present invention receives strain data from the strain acquisition module and temperature data from the temperature control module, and controls the relay module to energize and heat the shape memory alloy according to the preset control logic, so that it produces a shape memory effect and applies prestress to fix and reinforce the glass fiber reinforced plastic plate. Through the intelligent terminal, the user can view the operating status and reinforcement effect of the system in real time, and perform remote control and adjustment, thereby improving the intelligence and flexibility of the construction.

[0016] The present invention realizes intelligent control and remote management of the reinforcement process through wireless connection between the control chip and the intelligent terminal, improves construction efficiency and flexibility, and reduces the workload and construction time of on-site construction personnel.

[0017] The present invention is suitable for the reinforcement and repair of complex structures such as curved bridges and tunnels, can effectively enhance the strength and durability of the structure, has broad application prospects, and provides a new solution for the field of structural reinforcement. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below in conjunction with the accompanying drawings.

[0019] Figure 1 It is a schematic diagram of the overall structure of the intelligent segment prestressing reinforcement system based on shape memory alloy of the present invention; Figure 2 The enlarged schematic diagram of the first fixed block side connection structure of the three-group prestressed reinforcement system of the present invention Figure 1 ; Figure 3 The enlarged schematic diagram of the first fixed block side connection structure of the three-group prestressed reinforcement system of the present invention Figure 2 ; Figure 4 This is a schematic diagram of the structure of the first fixing block of the intermediate group of the present invention; Figure 5 This is a schematic diagram of the structure of the first fixed block of the left end group of the present invention; Figure 6 This is a schematic diagram of the structure of the first fixed block of the right end group of the present invention; Figure 7 This is a schematic diagram of the installation structure of the connecting clip of the present invention; Figure 8 This is a working principle diagram of the control chip of the present invention.

[0020] Explanation of the accompanying drawings: 1. upper clamp; 2. shape memory alloy; 3. lower clamp; 4. shape memory alloy heating connecting wire; 5. control chip; 6. temperature control module; 7. strain acquisition module; 8. left end structure connecting wire; 9. relay connecting wire; 10. right end structure connecting wire; 11. strain gauge; 12. power supply; 13. relay module; 14. pipe segment; 15. connecting clamp; 16. glass fiber reinforced plastic plate; 16-1. first fixed block; 16-2. second fixed block. DETAILED DESCRIPTION

[0021] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0022] like Figure 1-8 As shown, a smart segment prestressing reinforcement system based on shape memory alloy includes three groups of prestressing reinforcement units arranged side by side, each group of the prestressing reinforcement units includes a glass fiber reinforced plastic plate 16, and a first fixing block 16-1 and a second fixing block 16-2 are respectively installed at both ends of the glass fiber reinforced plastic plate 16, and the first fixing block 16-1 and the second fixing block 16-2 are respectively installed on two adjacent segments 14; The first fixing block 16-1 is provided with a clamping device and an intelligent control device, the glass fiber reinforced plastic plate 16 is clamped on the clamping device, and the clamping device and the intelligent control device are electrically connected; The three intelligent control devices on the first fixing blocks 16 - 1 are electrically connected together in sequence; A power source 12 for supplying power to the intelligent control device is installed on the first fixing block 16 - 1 in the prestressed reinforcement unit of the middle group among the three groups of prestressed reinforcement units arranged side by side.

[0023] In specific implementation, the three first fixing blocks 16 - 1 in the three groups of prestressed reinforcement units arranged side by side are installed on the same pipe segment 14 , and the three second fixing blocks 16 - 2 in the three groups of prestressed reinforcement units arranged side by side are also installed on the same adjacent pipe segment 14 .

[0024] Specifically, the clamping device includes an upper clamping piece 1, a lower clamping piece 3 and a connecting clamping piece 15; A plurality of shape memory alloys 2 are connected through the positioning groove of the first fixed block 16-1, the upper clip 1 and the lower clip 3 are clamped on the exposed ends of the plurality of shape memory alloys 2, the inner end of the shape memory alloy 2 is positioned by the connecting clip 15, the inner end of the shape memory alloy 2 and one end of the glass fiber reinforced plastic plate 16 are clamped between the connecting clip 15 and the first fixed block 16-1, and the connecting clip 15 is fastened to the first fixed block 16-1 by bolts.

[0025] The connecting clip 15 is used to connect the shape memory alloy 2 and the glass fiber reinforced plastic plate 16 together to ensure the effective application of prestress.

[0026] In a specific implementation, a connecting clip 15 is also provided on the second fixing block 16 - 2 , and the other end of the glass steel plate 16 is clamped between the connecting clip 15 and the second fixing block 16 - 2 , and the connecting clip 15 is fastened to the second fixing block 16 - 2 by bolts.

[0027] Specifically, the intelligent control device includes: a control chip 5, a strain acquisition module 7, a relay module 13 and a temperature control module 6, the control chip 5 is electrically connected to the strain acquisition module 7, the relay module 13 and the temperature control module 6 respectively, and the power supply 12 supplies power to the control chip 5, the strain acquisition module 7, the relay module 13 and the temperature control module 6 respectively.

[0028] Specifically, in one embodiment, the control chip 5, the strain acquisition module 7, the relay module 13 and the temperature control module 6 are positioned and installed at the front end of the first fixed block 16-1, and the clamping device is installed inside the first fixed block 16-1, wherein the first fixed block 16-1 is provided with a groove for installing the clamping device.

[0029] The control chip 5 collects the strain of the glass fiber reinforced plastic plate 16 through the strain collection module 7, so as to determine whether the strain meets the reinforcement requirements.

[0030] Specifically, the control chip 5 is wirelessly connected to a smart terminal, which includes a mobile phone and / or a computer, to achieve remote transmission and control of data.

[0031] Specifically, the strain acquisition module 7 is electrically connected to the strain gauge 11 . A plurality of strain gauges 11 are provided and are evenly distributed on the glass fiber reinforced plastic plate 16 , so as to accurately monitor the strain state of the glass fiber reinforced plastic plate 16 .

[0032] Specifically, the relay module 13 includes a plurality of relays, each of which is electrically connected to a piece of the shape memory alloy 2 so as to realize independent power-on heating control of different shape memory alloys 2; the relay is electrically connected to the shape memory alloy 2 via a relay connecting line 9.

[0033] Specifically, the temperature control module 6 is electrically connected to the shape memory alloy 2 via the shape memory alloy heating connecting wire 4 . The temperature control module 6 is used to monitor the temperature of the shape memory alloy 2 in real time and feed the temperature back to the control chip 5 .

[0034] Specifically, the power supply 12 is electrically connected to the overload protector, and the power supply 12 supplies power to the intelligent control device through the overload protector, so as to prevent the power supply 12 from causing damage to the system in the event of an overload.

[0035] The power source 12 is a high-power small power source, which is used to provide a stable and reliable current for the electrical heating of the shape memory alloy 2 .

[0036] In actual operation, before construction, the system is initialized and set, and the control chip 5 is loaded with preset control logic and parameters to ensure the normal operation of each module. According to the preset control logic, the control chip 5 controls the relay module 13 to heat the shape memory alloy 2. The shape memory alloy 2 produces a shape memory effect during the heating process, shrinks and applies prestress to fix the glass fiber reinforced plastic plate 16; the temperature control module 6 monitors the temperature change of the shape memory alloy 2 in real time to ensure that its heating temperature is within a safe range, and adjusts the power-on current as needed to ensure the stable application of prestress; the strain acquisition module 7 transmits the monitored strain data of the glass fiber reinforced plastic plate 16 to the control chip 5, and the control chip 5 determines the effect of the application of prestress according to the strain data, and adjusts the power-on state of the relay module 13 as needed to optimize the reinforcement effect. During the construction process, according to actual needs, the user can adjust the system parameters through the receiving terminal to optimize the effect of the application of prestress and the operating performance of the system.

[0037] Working principle: Before construction, all components of the system are installed in place and the system is initialized. The control chip 5 loads the preset control logic and parameter settings to ensure that each module works normally. The strain gauge 11 of the strain acquisition module 7 is installed on the FRP plate 16 to ensure that it can accurately monitor the strain state of the FRP plate 16, so as to determine whether the strain meets the design requirements. The control chip 5 sends strain information to the intelligent terminal (mobile phone). If the strain does not meet the reinforcement requirements, the control chip 5 continues to monitor the strain state of the FRP plate 16. If the strain meets the reinforcement requirements, the control chip 5 controls the relay module 13 to energize and heat the shape memory alloy 2 according to the preset control logic. The shape memory alloy 2 produces a shape memory effect during the heating process, shrinks and applies prestress to fix the FRP plate 16; the temperature control module 6 monitors the temperature change of the shape memory alloy 2 in real time to ensure that its heating temperature is within a safe range, and adjusts the power-on current as needed to ensure the stable application of prestress. Users can view the operating status and reinforcement effect of the system in real time through intelligent terminals (such as mobile phones), and perform remote control and adjustment to improve the intelligence and flexibility of construction.

[0038] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0039] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. An intelligent segment prestressing reinforcement system based on shape memory alloy, characterized in that: It comprises three groups of prestressed reinforcement units arranged side by side, each group of the prestressed reinforcement units comprises a glass fiber reinforced plastic plate (16), a first fixing block (16-1) and a second fixing block (16-2) are respectively installed at both ends of the glass fiber reinforced plastic plate (16), and the first fixing block (16-1) and the second fixing block (16-2) are respectively installed on two adjacently arranged pipe segments (14); The first fixing block (16-1) is provided with a clamping device and an intelligent control device, the glass fiber reinforced plastic plate (16) is clamped on the clamping device, and the clamping device and the intelligent control device are electrically connected; The three intelligent control devices on the first fixing blocks (16-1) are electrically connected together in sequence; A power source (12) for supplying power to the intelligent control device is installed on the first fixing block (16-1) in the middle group of the prestressed reinforcement units.

2. The intelligent segment prestressing reinforcement system based on shape memory alloy according to claim 1 is characterized in that: The clamping device comprises an upper clamping piece (1), a lower clamping piece (3) and a connecting clamping piece (15); A plurality of shape memory alloys (2) are connected through positioning grooves of the first fixing block (16-1); the upper clamp (1) and the lower clamp (3) are clamped on the exposed ends of the plurality of shape memory alloys (2); the inner ends of the shape memory alloys (2) are positioned by the connecting clamp (15); the inner ends of the shape memory alloys (2) and one end of the glass fiber reinforced plastic plate (16) are clamped between the connecting clamp (15) and the first fixing block (16-1); and the connecting clamp (15) is fastened to the first fixing block (16-1) by bolts.

3. The intelligent segment prestressing reinforcement system based on shape memory alloy according to claim 2 is characterized in that: The intelligent control device comprises: a control chip (5), a strain acquisition module (7), a relay module (13) and a temperature control module (6); the control chip (5) is electrically connected to the strain acquisition module (7), the relay module (13) and the temperature control module (6), respectively; and the power supply (12) supplies power to the control chip (5), the strain acquisition module (7), the relay module (13) and the temperature control module (6), respectively.

4. The intelligent segment prestressing reinforcement system based on shape memory alloy according to claim 3 is characterized in that: The control chip (5) is wirelessly connected to a smart terminal, and the smart terminal includes a mobile phone and / or a computer.

5. The intelligent segment prestressing reinforcement system based on shape memory alloy according to claim 3 is characterized in that: The strain acquisition module (7) is electrically connected to a strain gauge (11); a plurality of strain gauges (11) are provided and are evenly distributed on the glass fiber reinforced plastic plate (16).

6. The intelligent segment prestressing reinforcement system based on shape memory alloy according to claim 3 is characterized in that: The relay module (13) comprises a plurality of relays, each of which is electrically connected to a piece of the shape memory alloy (2) so as to achieve independent power-on heating control of different shape memory alloys (2); the relay is electrically connected to the shape memory alloy (2) via a relay connection line (9).

7. The intelligent segment prestressing reinforcement system based on shape memory alloy according to claim 3 is characterized in that: The temperature control module (6) is electrically connected to the shape memory alloy (2) via a shape memory alloy heating connecting wire (4), and the temperature control module (6) is used to monitor the temperature of the shape memory alloy (2) in real time and feed back the temperature to the control chip (5).

8. The shape memory alloy-based intelligent segment prestressing reinforcement system according to claim 1, characterized in that: The power supply (12) is electrically connected to the overload protector, and the power supply (12) supplies power to the intelligent control device through the overload protector.

9. The intelligent segment prestressing reinforcement system based on shape memory alloy according to claim 1 is characterized in that: The intelligent control device on the first fixed block (16-1) in the prestressed reinforcement unit of the middle group is electrically connected to the intelligent control device on the first fixed block (16-1) in the prestressed reinforcement unit of the left end group via a left end structural connection line (8), and the intelligent control device on the first fixed block (16-1) in the prestressed reinforcement unit of the middle group is electrically connected to the intelligent control device on the first fixed block (16-1) in the prestressed reinforcement unit of the right end group via a right end structural connection line (10).

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