Concrete compressive strength detection practical training system based on Hall sensor and practical training method thereof

Abstract

The invention provides a concrete compressive strength detection practical training system based on a Hall sensor and a practical training method thereof. The system comprises a simulation rebound apparatus, a concrete structure simulator and a cloud practical training platform. The simulated rebound apparatus is used for simulating rebound detection operation on the surface of the concrete structure simulator; the concrete structure simulator is used for identifying and simulating an operation area of the rebound apparatus and returning an identification result to the cloud practical training platform; and the cloud practical training platform is used for displaying information of an engineering project and carrying out compressive strength detection practical training simulation of a to-be-measured structure in the engineering project in cooperation with the simulation rebound apparatus and the concrete structure simulator. According to the invention, the operation simulation of on-site compressive strength detection is carried out through the simulation rebound apparatus and the concrete structure simulator; meanwhile, the virtual reality technology of a cloud practical training platform is combined, scene teaching of components is achieved, trainees can know practical application of compressive strength detection personally on the scene, and the teaching effect is improved.

Description

Technical Field

[0001] The present invention relates to the field of practical teaching, and in particular to a concrete compressive strength detection practical training system based on a Hall sensor and a practical training method thereof. Background Art

[0002] Concrete compressive strength is a key indicator for measuring concrete quality and is essential to ensuring the safety and reliability of the project. By conducting concrete compressive tests, we can accurately determine the strength grade of concrete, thereby verifying whether its various performance indicators meet the standards. Among the various methods for on-site testing of concrete compressive strength, the rebound method, as a commonly used non-destructive testing technology, has significant advantages. This method uses the spring built into the rebound hammer to drive the hammer to hit the concrete surface, and indirectly evaluates the compressive strength of concrete by measuring the ratio of the rebound distance of the hammer to the initial length of the spring (i.e., the rebound value). This technology is not only easy to operate, but also can avoid damage to the concrete structure, so it has been widely used in engineering practice. Despite the emergence of other non-destructive testing technologies, the rebound method still maintains its irreplaceable position in on-site applications due to its simple instrument structure, convenient operation, good correlation between the test value and the concrete strength under specific conditions, and economical testing costs.

[0003] For practitioners in the civil engineering and construction industries, mastering concrete compressive strength testing technology is an indispensable basic skill. In order to cultivate this professional skill, vocational colleges, applied undergraduates, and related testing units and construction units will organize relevant training and practical training courses for concrete compressive strength testing. Traditional practical training programs usually rely on real rebound test equipment and concrete specimens for practical operations. However, this program faces many challenges during implementation.

[0004] Specifically, making real concrete specimens not only requires a large training site, but also involves complex preparation processes, which makes it difficult for many schools and institutions to carry out training smoothly due to site and material limitations. In addition, traditional training programs often use standard concrete specimens, which makes it difficult for trainees to understand the specific locations of the measurement points in the actual structural components, and they cannot deeply understand the importance of the measured compressive strength to the entire component. In addition, the real rebound hammer will make a strong impact sound during the test, with the noise decibel reaching more than 100 decibels. Using the rebound hammer to conduct real concrete compressive strength testing in a teaching environment will not only affect students' hearing, but also affect other classes.

[0005] In view of this, the present invention proposes a concrete compressive strength detection training system based on a Hall sensor and a training method thereof. Summary of the invention

[0006] The purpose of the present invention is to propose a concrete compressive strength detection training system and a training method based on Hall sensors, which simulates the operation of on-site compressive strength detection by simulating a rebound tester and a concrete structure simulator; at the same time, combined with the virtual reality technology of a cloud training platform, scenario-based teaching of components is realized, so that trainees can understand the practical application of compressive strength detection in an immersive way and improve the teaching effect.

[0007] To achieve the above object, the technical solution of the present invention is as follows: A concrete compressive strength detection training system based on a Hall sensor, comprising a simulated rebound tester, a concrete structure simulator and a cloud training platform; The simulated rebound test hammer is used to simulate the rebound detection operation on the surface of the concrete structure simulator; The concrete structure simulator is used to identify the operation area of ​​the simulated rebound tester and return the identification result to the cloud training platform; The cloud training platform is used to display information of engineering projects, and cooperate with the simulated rebound tester and the concrete structure simulator to perform training simulation of compressive strength testing of structures to be measured in engineering projects.

[0008] Preferably, the simulated rebound tester includes a shell, a telescopic tube extending from one end of the shell, and a magnetic member located inside the shell; when the outer end of the telescopic tube is retracted to a position flush with the end of the shell, the magnetic member is close to the inner wall of the outer end of the telescopic tube.

[0009] Preferably, the surface of the concrete structure simulator is arranged with 4x4 matrix grid partitions, each partition surface is marked with a digital number, and each partition is provided with a Hall sensor for sensing the approach of a magnetic part.

[0010] Preferably, the concrete structure simulator also includes a built-in MCU, which is connected to the Hall sensors through IO ports respectively, and different IO ports correspond one-to-one to the Hall sensors in different areas; the MCU detects the level changes of different IO ports to identify the operating area of ​​the simulated rebound tester, and returns the identification result to the cloud training platform.

[0011] Preferably, the magnetic component is an N52 magnetic ring.

[0012] Preferably, the shell comprises a cylindrical shell with an opening at one end and a limiting shell detachably connected to the opening of the cylindrical shell; the limiting shell is provided with a limiting opening for facilitating the extension of the outer end of the telescopic tube; the end of the telescopic tube located inside the shell is provided with an outwardly protruding limiting edge, and the limiting edge is limited by the limiting opening to prevent the telescopic tube from escaping from the shell; a spring is provided between the limiting edge of the telescopic tube and the inner wall of the bottom of the cylindrical shell to realize the extension and retraction of the outer end of the telescopic tube relative to the shell.

[0013] Preferably, the bottom inner wall of the columnar shell is provided with a first fixing column facing the opening direction, the first fixing column is connected to a second fixing column facing the opening direction, the second fixing column is connected to a magnetic part; the spring is sleeved on the first fixing column and the second fixing column.

[0014] Preferably, the limiting shell is threadedly connected to the columnar shell, the first fixing column is threadedly connected to the second fixing column, and the magnetic member is threadedly connected to the second fixing column via a bolt.

[0015] Preferably, the cloud-based training platform supports 360-degree panoramic mode, web-based three-dimensional presentation mode, and VR presentation mode for simulating the compressive strength training process and 3D presentation of scenes and components.

[0016] A training method for a concrete compressive strength detection training system based on a Hall sensor specifically comprises the following steps: S1. Understand the project information through the cloud training platform and select the construction to be measured; S2. Selecting a measurement area on the structure to be measured; S3. Use the simulated rebound hammer and concrete structure simulator to simulate the compressive strength measurement of the selected measurement area: Place the simulated rebound hammer in each numbered area of ​​the concrete structure simulator, and press the simulated rebound hammer to retract the telescopic tube, so that the internal magnetic part is close to the Hall sensor of the corresponding operation area of ​​the concrete structure simulator; When the Hall sensor senses the magnetic part approaching, it pulls down the level of the corresponding IO port of the MCU. The MCU detects the level change of the IO port and sends the data to the cloud training platform. The cloud training platform receives the data sent by the MCU, retrieves the corresponding data from the database according to the identified operation area number of the concrete structure simulator, and displays the compressive strength value of the operation area; Repeat the above steps until the compressive strength values ​​of 16 numbered areas on the concrete structure simulator are read; S4. Based on the 16 compressive strength values ​​obtained, discard the 3 maximum values ​​and the 3 minimum values, and calculate the average value of the remaining 10 compressive strength values ​​as the compressive strength of the selected measurement area; complete the compressive strength test training simulation of the selected measurement area.

[0017] Compared with the prior art, the present invention has the following beneficial effects: The training system of the present invention takes up little space and does not require the production of concrete specimens. It can be quickly arranged in an indoor training room. At the same time, the scenario-based teaching allows trainees to better understand the significance and role of compressive strength testing. The operation simulation of on-site compressive strength testing is carried out by simulating the rebound hammer and the concrete structure simulator, so that trainees can complete the entire training process in a realistic environment and enhance the sense of actual operation. Using 360-degree panoramic images, three-dimensional structural displays and virtual reality (VR) technology, the background information of the training project is comprehensively introduced, and the projects to be built and the components to be tested are intuitively displayed to provide an immersive learning experience. Compared with traditional rebound hammers, the simulated rebound hammer of the present invention performs well in noise control. The noise level does not exceed 30 decibels during operation, which not only ensures the hearing health of students, but also avoids interference with teaching activities of other classes. It is more suitable for use in a teaching environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the simulated rebound hammer of the present invention; Figure 2 It is a structural schematic diagram of the concrete structure simulator of the present invention; Figure 3 This is the circuit diagram of the Hall sensor of the present invention.

[0019] In the figure: 1-columnar housing, 2-limiting housing, 3-telescopic tube, 4-spring, 5-magnetic member, 6-first fixing column, 7-second fixing column, 8-bolt, 9-concrete structure simulator, 10-limiting edge. DETAILED DESCRIPTION

[0020] The following is combined with Figure 1-3 , the technical solution of the present invention is specifically described.

[0021] The present invention proposes a concrete compressive strength detection training system based on a Hall sensor, comprising a simulated rebound tester, a concrete structure simulator 9 and a cloud training platform; The simulated rebound test hammer is used to simulate the rebound detection operation on the surface of the concrete structure simulator; The concrete structure simulator 9 is used to identify the operation area of ​​the simulated rebound tester and return the identification result to the cloud training platform; The cloud training platform is used to display information of engineering projects, and cooperate with the simulated rebound tester and the concrete structure simulator to perform training simulation of compressive strength testing of structures to be measured in engineering projects.

[0022] In this embodiment, the simulated rebound tester includes a shell, a telescopic tube 3 extending from one end of the shell, and a magnetic component 5 located inside the shell; when the outer end of the telescopic tube 3 is retracted to a position flush with the end of the shell, the magnetic component 5 is close to the inner wall of the outer end of the telescopic tube 3.

[0023] In this embodiment, the surface of the concrete structure simulator is arranged with 4x4 matrix grid partitions, each partition surface is marked with a number, and each partition is provided with a Hall sensor for sensing the approach of a magnetic part.

[0024] In this embodiment, the concrete structure simulator also includes a built-in MCU, which is connected to the Hall sensors through IO ports, and different IO ports correspond to Hall sensors in different areas one by one; the MCU detects the level changes of different IO ports to identify the operation area of ​​the simulated rebound tester, and returns the identification result to the cloud training platform. Figure 3 , MCU is connected to HE_1 and HE_2 interfaces through IO ports respectively.

[0025] In this embodiment, the magnetic component 5 is an N52 magnetic ring.

[0026] In this embodiment, the shell includes a cylindrical shell 1 with an opening at one end and a limiting shell 2 detachably connected to the opening of the cylindrical shell; the limiting shell 2 is provided with a limiting opening for facilitating the extension of the outer end of the telescopic tube 3; the end of the telescopic tube 3 located inside the shell is provided with an outwardly protruding limiting edge 10, and the limiting edge 10 is limited by the limiting opening to prevent the telescopic tube 3 from escaping from the shell; a spring 4 is provided between the limiting edge 10 of the telescopic tube 3 and the inner wall of the bottom of the cylindrical shell 1 to realize the extension and retraction of the outer end of the telescopic tube 3 relative to the shell.

[0027] In this embodiment, the bottom inner wall of the cylindrical shell 1 is provided with a first fixing column 6 facing the opening direction, the first fixing column 6 is connected to a second fixing column 7 facing the opening direction, and the second fixing column 7 is connected to a magnetic part 5; the spring 4 is sleeved on the first fixing column 6 and the second fixing column 7.

[0028] In this embodiment, the limiting housing is threadedly connected to the columnar housing, the first fixing column is threadedly connected to the second fixing column, and the magnetic member is threadedly connected to the second fixing column via a bolt 8 .

[0029] In this embodiment, the cloud-based training platform supports 360-degree panoramic mode, web-based three-dimensional presentation mode, and VR presentation mode to simulate the compressive strength training process and 3D presentation of scenes and components.

[0030] A training method for a concrete compressive strength detection training system based on a Hall sensor specifically comprises the following steps: S1. Understand the project information through the cloud training platform and select the construction to be measured; S2. Selecting a measurement area on the structure to be measured; S3. Use the simulated rebound hammer and concrete structure simulator to simulate the compressive strength measurement of the selected measurement area: Place the simulated rebound hammer in each numbered area of ​​the concrete structure simulator, and press the simulated rebound hammer to retract the telescopic tube, so that the internal magnetic part is close to the Hall sensor of the corresponding operation area of ​​the concrete structure simulator; When the Hall sensor senses the magnetic part approaching, it pulls down the level of the corresponding IO port of the MCU. The MCU detects the level change of the IO port and sends the data to the cloud training platform. The cloud training platform receives the data sent by the MCU, retrieves the corresponding data from the database according to the identified operation area number of the concrete structure simulator, and displays the compressive strength value of the operation area; For example, when the simulated rebound tester is pressed in the 01 area of ​​the concrete structure simulator, the Hall sensor in the concrete structure simulator is triggered through the internal N52 magnetic ring. When the Hall sensor senses the approach of a magnet in the 01 area, it will pull down the IO port level. The MCU can detect the level change in the 01 area, and the MCU sends the data to the training platform. The training platform retrieves the database data through the 01 number and displays the compressive strength value of the measuring point. Repeat the above steps until the compressive strength values ​​of 16 numbered areas on the concrete structure simulator are read; S4. Based on the 16 compressive strength values ​​obtained, discard the 3 maximum values ​​and the 3 minimum values, and calculate the average value of the remaining 10 compressive strength values ​​as the compressive strength of the selected measurement area; complete the compressive strength test training simulation of the selected measurement area.

[0031] The main features and significant advantages of the invention include: 1. No need to make real specimens: Through simulation technology, the tedious steps of preparing actual concrete specimens in traditional methods are completely eliminated, which not only saves time and material costs, but also avoids inconsistency in experimental results caused by differences in specimen quality. 2. Small size and light weight: Compared with traditional large-scale equipment, the device of the present invention is compact in design, easy to carry and place, and is very suitable for use in limited spaces, such as standard classrooms or laboratories, without the need for special site layout. 3. Silent operation: The entire system is almost silent during operation, which not only protects students' hearing health, but also ensures that it will not interfere with teaching activities in other classes, creating a quiet and harmonious learning environment. 4. Easy to expand and deploy: Due to the miniaturized design of a single device, the number of devices can be flexibly increased according to teaching needs, so that each trainee can have independent operation opportunities, greatly improving teaching efficiency and practical effects. 5. Environmental protection and energy saving: Reduces the demand for real materials and reduces resource consumption; at the same time, the silent feature also reflects the concept of green environmental protection. 6. Improve teaching experience: Training in a simulated environment allows students to practice repeatedly without being restricted by physical test pieces, which helps deepen their understanding and master relevant skills, laying a solid foundation for future professional work.

[0032] The present invention uses a cloud training platform to link with local simulation training devices and processing devices to conduct virtual and real training operations. It can not only meet the trainees' training on the compressive strength testing process, but also enable them to learn more background knowledge through the training platform. Traditional training methods can only perform simple and repetitive training operations on a single concrete specimen.

[0033] The cloud of the present invention uses 360-degree panoramic view, three-dimensional structure presentation and VR technology and other virtual reality technologies to introduce the background of the training project, the project introduction and the detailed presentation of the structure to be tested, which avoids the trainees being able to operate only a single standard concrete specimen in the traditional training process and being unable to place the training in the overall project background and overall construction perspective for training thinking. At the same time, the cloud presentation can present multiple projects and multiple structures, and is easy and fast to expand, so that trainees can be exposed to more training cases and content.

[0034] The above are preferred embodiments of the present invention. Any changes made according to the technical solution of the present invention, as long as the resulting functions do not exceed the scope of the technical solution of the present invention, belong to the protection scope of the present invention.

Claims

1. A concrete compressive strength detection training system based on Hall sensor, characterized in that: Including simulated rebound tester, concrete structure simulator and cloud training platform; The simulated rebound test hammer is used to simulate the rebound detection operation on the surface of the concrete structure simulator; The concrete structure simulator is used to identify the operation area of ​​the simulated rebound tester and return the identification result to the cloud training platform; The cloud training platform is used to display information of engineering projects, and cooperate with the simulated rebound tester and the concrete structure simulator to perform training simulation of compressive strength testing of structures to be measured in engineering projects.

2. According to claim 1, a Hall sensor-based concrete compressive strength detection training system is characterized in that: The simulated rebound tester includes a shell, a telescopic tube extending from one end of the shell, and a magnetic member located inside the shell; when the outer end of the telescopic tube is retracted to a position flush with the end of the shell, the magnetic member is close to the inner wall of the outer end of the telescopic tube.

3. According to claim 2, a Hall sensor-based concrete compressive strength detection training system is characterized in that: The surface of the concrete structure simulator is arranged with 4x4 matrix grid partitions, each partition surface is marked with a number, and each partition is provided with a Hall sensor for sensing the approach of a magnetic part.

4. According to claim 3, a Hall sensor-based concrete compressive strength detection training system is characterized in that: The concrete structure simulator also includes a built-in MCU, which is connected to the Hall sensors through IO ports, and different IO ports correspond to Hall sensors in different areas one by one; the MCU detects the level changes of different IO ports to identify the operating area of ​​the simulated rebound tester, and returns the identification result to the cloud training platform.

5. A Hall sensor-based concrete compressive strength detection training system according to any one of claim 4, characterized in that: The magnetic part is an N52 magnetic ring.

6. According to claim 4, a Hall sensor-based concrete compressive strength detection training system is characterized in that: The shell comprises a cylindrical shell with an opening at one end and a limiting shell detachably connected to the opening of the cylindrical shell; the limiting shell is provided with a limiting opening for facilitating the extension of the outer end of the telescopic tube; the end of the telescopic tube located in the shell is provided with an outwardly protruding limiting edge, and the limiting edge is limited by the limiting opening to prevent the telescopic tube from escaping from the shell; a spring is provided between the limiting edge of the telescopic tube and the inner wall of the bottom of the cylindrical shell to realize the extension and retraction of the outer end of the telescopic tube relative to the shell.

7. The Hall sensor-based concrete compressive strength detection training system according to claim 4 is characterized in that: The bottom inner wall of the columnar shell is provided with a first fixing column facing the opening direction, the first fixing column is connected to a second fixing column facing the opening direction, the second fixing column is connected to a magnetic member; the spring is sleeved on the first fixing column and the second fixing column.

8. The Hall sensor-based concrete compressive strength detection training system according to claim 4 is characterized in that: The limiting shell is threadedly connected to the columnar shell, the first fixing column is threadedly connected to the second fixing column, and the magnetic member is threadedly connected to the second fixing column through a bolt.

9. The Hall sensor-based concrete compressive strength detection training system according to claim 4 is characterized in that: The cloud-based training platform supports 360-degree panoramic, web-based three-dimensional and VR presentation methods for compressive strength training process simulation and 3D presentation of scenes and components.

10. A training method for a concrete compressive strength detection training system based on a Hall sensor according to any one of claims 4 to 9, characterized in that: The specific steps include: S1. Understand the project information through the cloud training platform and select the construction to be measured; S2. Selecting a measurement area on the structure to be measured; S3. Use the simulated rebound hammer and concrete structure simulator to simulate the compressive strength measurement of the selected measurement area: Place the simulated rebound hammer in each numbered area of ​​the concrete structure simulator, and press the simulated rebound hammer to retract the telescopic tube, so that the internal magnetic part is close to the Hall sensor of the corresponding operation area of ​​the concrete structure simulator; When the Hall sensor senses the magnetic part approaching, it pulls down the level of the corresponding IO port of the MCU. The MCU detects the level change of the IO port and sends the data to the cloud training platform. The cloud training platform receives the data sent by the MCU, retrieves the corresponding data from the database according to the identified operation area number of the concrete structure simulator, and displays the compressive strength value of the operation area; Repeat the above steps until the compressive strength values ​​of 16 numbered areas on the concrete structure simulator are read; S4. Based on the 16 compressive strength values ​​obtained, discard the 3 maximum values ​​and the 3 minimum values, and calculate the average value of the remaining 10 compressive strength values ​​as the compressive strength of the selected measurement area; complete the compressive strength test training simulation of the selected measurement area.

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