Structure durability regulation and integration system based on LORA wireless communication

Abstract

The invention discloses a structure durability regulation and control and integration system based on LORA wireless communication, and relates to the field of control or regulation systems.The system comprises a central control system, an acquisition system, a regulation and control system and a data processing system.The central control system is wirelessly connected with the acquisition system and the regulation and control system through an LORA module; and the central control system and the data processing system upload data through an LORA gateway. The LORA communication technology and the LORA gateway integration technology are adopted, intelligent monitoring covering tests in multiple places with the central control system as the center is achieved, the durability test system integrates monitoring and control, meanwhile, due to the fact that the LORA is provided with a battery, sudden power failure in the test process can be avoided, the stability of an ion concentration field is guaranteed, and the service life of the system is prolonged. Online real-time monitoring and regulation are realized, so that the simulation environment is closer to the natural environment, and the result of the durability simulation test is more accurate and stable.

Description

Technical Field

[0001] The present invention relates to the field of control or regulation systems, and in particular to a structural durability regulation and integration system based on LORA wireless communication, which is suitable for monitoring durability tests. Background Art

[0002] Rebar corrosion is the main factor leading to the degradation of reinforced concrete (RC) structural performance, especially in underwater or underground environments such as coastal areas, saline soils, and deicing salts, which can shorten the service life of reinforced concrete components and lead to premature failure.

[0003] At present, there have been a lot of studies on the durability of concrete components at home and abroad, among which the methods of simulating corrosion include real environment method and simulated environment method. The former generally places the components in the real environment to obtain real and reliable data, but it is often quite time-consuming and labor-intensive; while the latter generally uses methods such as power supply, solution temperature increase, and pH value control to accelerate corrosion, which greatly shortens the corrosion time, but cannot fully reflect the real service environment conditions, and there is a certain gap between the results and the actual situation.

[0004] In actual engineering, reinforced concrete components are always under the joint action of load and environment when working. Among them, regarding load, the commonly used loading devices in existing coupling test research mainly include spring loading, jack loading, etc. These traditional loading devices are in rigid contact with the structure. The damage to the surface of the component during the corrosion process will cause the applied external load to decrease as the corrosion continues, but these traditional loading devices do not have load monitoring and periodic compensation, so they cannot fully guarantee the accurate application and stable maintenance of the load during the test. In addition, the traditional method can only obtain traditional parameters such as mass loss, relative dynamic elastic modulus and strength. These parameters are periodic test parameters, which cannot be measured online continuously, and cannot continuously obtain the whole process information of component degradation, and may lose important critical points of performance evolution.

[0005] Regarding the environment, in the process of using the corrosion solution for the durability simulation test, due to the numerous environmental factors and the number of collected data, the lines between the test devices are often very complicated, and are easily corroded by the solution or damaged by human beings during the test, so special attention and caution are required. At the same time, the existing load-chloride corrosion test often immerses the loading device and the test piece as a whole into the corrosion solution, and long-term immersion easily leads to stress loss caused by corrosion of the device. In addition, with the continuous transmission of the chloride solution to the interior of the concrete and the evaporation effect under the long-term test conditions, the concentration of the chloride solution fluctuates greatly, and there is currently no precise control measure for the chloride concentration, and it is impossible to achieve long-term stability of the stress field and the chloride ion concentration field. For example, patent CN 102213660A discloses a concrete multi-factor durability experimental device under the combined action of load and environment, but does not solve the problem of device corrosion and unstable chloride concentration. Summary of the invention

[0006] The purpose of the present invention is to propose a structural durability control and integration system based on LORA wireless communication. By adopting LORA communication technology and LORA gateway integration technology, intelligent monitoring covering multiple locations with a central control system as the center is realized, and a durability test system integrating monitoring and control is formed. At the same time, since LORA has its own battery, sudden power failure during the test can be avoided, the stability of the ion concentration field can be ensured, and online real-time monitoring and adjustment can be achieved, so that the simulated environment is closer to the natural environment, and the results of the durability simulation test are guaranteed to be more accurate and stable, thereby establishing a correlation between the two.

[0007] In order to achieve the above object, the technical solution of the present invention is as follows: The present invention provides a structural durability control and integration system based on LORA wireless communication, including a central control system, a collection system, a control system, and a data processing system, wherein the central control system is wirelessly connected to the collection system and the control system through a LORA module, and the central control system and the data processing system upload data through a LORA gateway; The acquisition system includes an acquisition module corresponding to each component, each acquisition module receives information collected by the sensor on the corresponding component through the LORA module, and the acquisition module of each component then summarizes the information to the acquisition system, and the acquisition system sends all the information to the central control system through the LORA module wireless communication; the sensor includes a displacement sensor, a water level sensor, a stress sensor, a pH sensor, a temperature sensor, and a load sensor, and each sensor is configured with a LORA module to realize wireless communication connection with the acquisition module; The central control system is used to integrate the environment, load, displacement, and stress information during all component tests. When the temperature, pH value, and water level difference between the natural environment integrated by the central control system and the test environment exceeds the threshold value set in advance by the system, the central control system sends a control signal to the control system, and the control system controls the opening or closing of the corresponding control device; The control system includes a control module corresponding to each component, and the control device of each component is equipped with a separate LORA module. The control system sends control instructions to the control modules on each component through the LORA module to realize wireless control of the component control device; the control device includes a constant temperature device, a pumping device, and a pH control device. The control device and the control module are connected through the LORA module wireless communication; the control instructions include constant temperature heating instructions, pH control device start and stop instructions, and water pump start and stop instructions; The data processing system includes a LORA gateway, a mobile phone terminal, and a PC terminal. The LORA gateway can integrate the information of durability tests in various places in the central control system, and finally send the integrated information to the data processing system through the LORA gateway. Various information and charts of tests in various places can be remotely viewed and shared through the PC terminal or mobile phone terminal.

[0008] Furthermore, the displacement sensor is installed at the junction of the component and the base to monitor the displacement of the bottom of the component during the experiment.

[0009] Furthermore, the water level sensor is installed above the bottom of the component to monitor whether the water level in which the component is immersed submerges the bottom of the component.

[0010] Furthermore, the stress sensor is installed at the steel bars and concrete at the bottom of the component to monitor the stress changes of the steel bars and concrete during the test.

[0011] Furthermore, the pH sensor is installed at 1 / 2 of the height of the solution tank to monitor changes in the pH value of the solution during the experiment.

[0012] Furthermore, the temperature sensor is installed at 1 / 2 of the height of the solution tank to monitor changes in solution temperature during the experiment.

[0013] Furthermore, the load sensor is installed at the load application position on the top of the component to monitor the continuous load changes applied to the test component.

[0014] Furthermore, the constant temperature device is installed at 1 / 2 of the height of the solution tank to heat up and cool down the solution.

[0015] Furthermore, the pumping devices are respectively installed on the upper part and the bottom part of the solution tank to pump water and drain water, thereby controlling the water level and the dry-wet cycle of the test.

[0016] Furthermore, the pH control device is installed on the top of the solution tank to control the addition of the solvent.

[0017] Compared with the prior art, the present invention has the following beneficial effects: The structural durability control and integration system based on LORA wireless communication proposed by the present invention is equipped with LORA wireless communication through sensors and control devices to avoid complex circuits and corrosion damage of the test device; at the same time, the control system can automatically control according to the set threshold value to ensure the constancy of the relevant factors of the erosion solution; the LORA gateway uploads the test information to the cloud server to ensure the stability, durability and remote transmission of the test data; the data processing system can directly process the test data according to the requirements set in advance, and form corresponding charts for direct browsing; at the same time, because LORA has its own battery, it can avoid sudden power failure and stress loss during the test, ensure the stability of the ion concentration field, and achieve online real-time monitoring and control, so that the simulated environment is closer to the natural environment, and the results of the durability simulation test are more accurate and stable, thereby establishing the correlation between the two. In summary, the system of the present invention allows durability tests to achieve long-distance monitoring, synchronous tests in multiple locations, and timely sharing and comparison of test information. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0019] Figure 1 It is a schematic diagram of the structure of a structural durability control and integration system based on LORA wireless communication provided by an embodiment of the present invention; Figure 2 It is a structural framework diagram of an integrated system provided by an embodiment of the present invention; Figure 3 It is a structural framework diagram of a collection system provided by an embodiment of the present invention; Figure 4 It is a structural framework diagram of a control system provided by an embodiment of the present invention; Figure 5 It is a structural framework diagram of a data processing system provided by an embodiment of the present invention; Figure 6 It is a schematic diagram of information integration provided by an embodiment of the present invention.

[0020] Description of reference numerals: 1. Central control system, 2. Acquisition system, 21. Displacement sensor, 22. Water level sensor, 23. Stress sensor, 24. pH sensor, 25. Temperature sensor, 26. Load sensor, 3. Control system, 31. Constant temperature device, 32. Pumping device, 33. pH control device, 34. Solution tank, 4. Data processing system, 41. LORA gateway, 42. Mobile terminal, 43. PC terminal. DETAILED DESCRIPTION

[0021] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the embodiments and drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the art without making creative work are within the scope of protection of the present invention.

[0022] refer to Figure 1-Figure 6 The present invention provides a structural durability control and integration system based on LORA wireless communication, including a central control system 1, a collection system 2, a control system 3, and a data processing system 4, wherein the central control system 1 is wirelessly connected to the collection system 2 and the control system 3 through a LORA module, and the central control system 1 and the data processing system 4 upload data through a LORA gateway.

[0023] The acquisition system 2 includes an acquisition module corresponding to each component. Each acquisition module receives information collected by the sensor on the corresponding component through the LORA module. The acquisition module of each component then aggregates the information to the acquisition system 2. The acquisition system 2 sends all the information to the central control system 1 through the LORA module wireless communication; wireless connection between components is realized, avoiding the problem of complicated circuits and corrosion damage in traditional durability test. Specifically, the sensors include displacement sensors 21, water level sensors 22, stress sensors 23, pH sensors 24, temperature sensors 25, and load sensors 26, and each sensor is equipped with a LORA module to realize wireless communication connection with the acquisition module.

[0024] The sensor in the present invention can be installed at a specific position to collect the required information according to different test pieces and test schemes. In this embodiment, the test component adopts a reinforced concrete column, and the displacement sensor 21 is installed at the junction of the component column and the base to monitor the displacement of the bottom of the component, that is, the column foot, during the experiment. The water level sensor 22 is installed above the bottom of the component, that is, the column foot, to monitor whether the water level height of the component is immersed in the bottom of the component. The stress sensor 23 is installed at the steel bar and concrete at the bottom of the component, that is, the column foot, to monitor the stress changes of the steel bar and concrete during the test. The pH sensor 24 is installed at 1 / 2 of the height of the solution box 34 to monitor the changes in the pH value of the solution during the experiment. The temperature sensor 25 is installed at 1 / 2 of the height of the solution box 34 to monitor the changes in the temperature of the solution during the experiment. The load sensor 26 is installed at the load application position at the top of the component to monitor the continuous load changes applied to the test component.

[0025] The central control system 1 is used to integrate the environment, load, displacement, and stress information during all component tests, and compare the temperature, pH value, and water level in the natural environment and the simulated environment. When the temperature, pH, and water level difference between the natural environment integrated by the central control system 1 and the test environment exceeds the threshold set in advance by the system, the central control system 1 sends a control signal to the control system 3, and the control system 3 controls the opening or closing of the corresponding control device.

[0026] The control system 3 includes a control module corresponding to each component, and the control device of each component is equipped with a separate LORA module. The control device and the control module are connected to each other through the LORA module wireless communication; the control system 3 sends control instructions to the control modules on each component through the LORA module. After the control module receives the control information sent by the control system 3, it sends it to the control device installed in the test through the LORA module to control the opening and closing of the control device, thereby realizing wireless control of the component control device, thereby ensuring the constancy of the test factors and avoiding the superposition of test errors. The control instructions include constant temperature heating instructions, pH control device opening and closing instructions, and water pump opening and closing instructions.

[0027] The control device includes a constant temperature device 31, a pumping device 32, and a pH control device 33. The control device can adjust the installation position according to different test pieces and test schemes. Specifically, in this embodiment, the constant temperature device 31 is installed at 1 / 2 of the height of the solution tank 34 to heat up and cool down the solution. Furthermore, the pumping device 32 is installed at the top and bottom of the solution tank 34 respectively to pump water and drain water, thereby controlling the water level and dry-wet cycle of the test. Furthermore, the pumping device 32 can use a water pump. The pH control device 33 is installed at the top of the solution tank 34 to control the addition of the solvent.

[0028] When the temperature, pH, and water level difference between the natural environment and the test environment integrated by the central control system 1 exceeds the threshold value set in advance by the system, a control signal will be sent to the control system 3, and the constant temperature device 31 will be turned on to keep the temperature difference between the two constant; the water pump will be turned on to keep the water level difference between the two constant; and the pH control device 33 will be turned on to keep the pH difference between the two constant. By making the test environment close to the natural environment to a certain extent, the connection between the two can be established, ensuring that the durability test results are more accurate and stable.

[0029] The data processing system 4 includes a LORA gateway 41, a mobile terminal 42, and a PC terminal 43. The LORA gateway 41 can integrate the information of durability tests in various places in the central control system 1, and finally send the integrated information to the data processing system 4 through the LORA gateway 41. The data processing system 4 sets the relevant chart requirements in advance according to the needs of the test piece and the test plan, and automatically processes the data to form corresponding charts. Various information and charts of tests in various places are remotely viewed and shared through the PC terminal 43 or the mobile terminal 42. The mobile terminal 42 and the PC terminal 43 can be directly remotely viewed through the APP or web page, so that information integration and sharing of multiple locations and multiple tests can be realized.

[0030] The structural durability control and integration system based on LORA wireless communication of the present invention is suitable for structural durability tests in coastal, deicing salt and saline soil environments, and is particularly suitable for component durability tests in simulated coastal environments.

[0031] The system of the present invention is used to carry out a component durability test in a simulated coastal environment. The data monitored by the system are shown in Table 1, including strain, temperature, water level and pH value.

[0032] Table 1 Test data

[0033] Compared with the prior art, the advantages of the present invention are: 1. The present invention adopts LORA communication technology and LORA gateway integration technology to realize intelligent monitoring covering multiple locations with a central control system as the center. It is a durability test system integrating monitoring, control and integration. According to the acquisition system, components in the natural environment and components in the simulated environment are collected remotely and synchronously in multiple locations. The environmental information of the components in the natural environment and the simulated environment is integrated and compared through the central control system. Various factors of the simulated environment are controlled through the regulation system, so that the simulated environment method is closer to the real environment during the test, thereby establishing a correlation between the two.

[0034] 2. This system relies on the LORA gateway to upload component data from multiple locations, multiple components, and multiple factors from the central control system to the data processing system, and the progress of tests in various locations can be viewed through the PC or mobile phone. It realizes long-distance monitoring of durability tests, simultaneous tests in multiple locations, and timely sharing and comparison of test information.

[0035] 3. The acquisition system can maximize the solution of the complex lines and corrosion damage between test devices by equipping it with LORA wireless communication. At the same time, the sensor can monitor the solution environment in real time, continuously obtain information on the entire process of component degradation, and avoid losing important durability critical points. At the same time, because LORA has its own battery for low-energy transmission and does not rely on local power supply, it can avoid sudden power outages during the test, ensure the stability of the ion concentration field, and achieve online real-time monitoring and regulation, making the simulated environment closer to the natural environment, ensuring that the results of the durability simulation test are more accurate and stable, thereby establishing a correlation between the two.

[0036] 4. The system can compare the data collected by the solution data acquisition device with the initial threshold set by the central control center, realize remote automatic control and stress loss warning of the heating device, pH control device, and water pump, and ensure constant solution temperature and pH value, water level control, and periodic load compensation.

[0037] 5. After the system uploads the data to the data processing system, the data processing system will automatically generate time-stress curves, time-displacement curves and other charts according to the set requirements input in advance by the system. They can be viewed at any time through the PC or mobile phone during the experiment to more accurately evaluate the degradation of material properties and component durability.

[0038] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. Structural durability control and integration system based on LORA wireless communication, characterized by: It comprises a central control system (1), a collection system (2), a control system (3), and a data processing system (4), wherein the central control system (1) is wirelessly connected to the collection system (2) and the control system (3) via a LORA module, and the central control system (1) and the data processing system (4) upload data via a LORA gateway (41); The acquisition system (2) comprises an acquisition module corresponding to each component, each acquisition module receives information collected by a sensor on the corresponding component through a LORA module, and the acquisition module of each component then aggregates the information into the acquisition system (2), and the acquisition system (2) sends all the information to the central control system (1) through wireless communication of the LORA module; the sensors comprise a displacement sensor (21), a water level sensor (22), a stress sensor (23), a pH sensor (24), a temperature sensor (25), and a load sensor (26), and each sensor is equipped with a LORA module to realize wireless communication connection with the acquisition module; The central control system (1) is used to integrate the environment, load, displacement and stress information during all component tests. When the temperature, pH value and water level difference between the natural environment integrated by the central control system (1) and the test environment exceeds a threshold value set in advance by the system, the central control system (1) sends a control signal to the control system (3), and the control system (3) controls the opening or closing of the corresponding control device; The control system (3) comprises a control module corresponding to each component, and the control device of each component is equipped with a separate LORA module. The control system (3) sends control instructions to the control modules on each component through the LORA module to realize wireless control of the component control device; the control device comprises a constant temperature device (31), a pumping device (32), and a pH control device (33), and the control device and the control module are connected to each other through the LORA module wireless communication; the control instructions include a constant temperature heating instruction, a pH control device on and off instruction, and a water pump on and off instruction; The data processing system (4) includes a LORA gateway (41), a mobile terminal (42), and a PC terminal (43). The LORA gateway (41) can integrate the information of durability tests in various places in the central control system (1), and finally send the integrated information to the data processing system (4) through the LORA gateway (41). Various information and charts of tests in various places can be remotely viewed and shared through the PC terminal (43) or the mobile terminal (42).

2. The structural durability control and integration system based on LORA wireless communication according to claim 1 is characterized in that: The displacement sensor (21) is installed at the junction of the component and the base, and is used to monitor the displacement of the bottom of the component during the experiment.

3. The structural durability control and integration system based on LORA wireless communication according to claim 1 is characterized in that: The water level sensor (22) is installed above the bottom of the component to monitor whether the water level in which the component is immersed submerges the bottom of the component.

4. The structural durability control and integration system based on LORA wireless communication according to claim 1 is characterized in that: The stress sensor (23) is installed at the steel bars and concrete at the bottom of the component to monitor the stress changes of the steel bars and concrete during the test.

5. The structural durability control and integration system based on LORA wireless communication according to claim 1 is characterized in that: The pH sensor (24) is installed at 1 / 2 of the height of the solution tank (34) to monitor changes in the pH value of the solution during the experiment.

6. The structural durability control and integration system based on LORA wireless communication according to claim 1 is characterized in that: The temperature sensor (25) is installed at 1 / 2 of the height of the solution box (34) to monitor changes in the solution temperature during the experiment.

7. The structural durability control and integration system based on LORA wireless communication according to claim 1 is characterized in that: The load sensor (26) is installed at the load application position on the top of the component to monitor the continuous load changes applied to the test component.

8. The structural durability control and integration system based on LORA wireless communication according to claim 1 is characterized in that: The constant temperature device (31) is installed at 1 / 2 of the height of the solution tank (34) and is used to heat and cool the solution.

9. The structural durability control and integration system based on LORA wireless communication according to claim 1, characterized in that: The pumping device (32) is respectively installed on the top and bottom of the solution tank (34) to pump water and drain water, thereby controlling the water level and the dry-wet cycle of the test.

10. The structural durability control and integration system based on LORA wireless communication according to claim 1, characterized in that: The pH control device (33) is installed on the top of the solution tank (34) to control the addition of solvent.

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