A multifunctional mobile structure test box for college teaching

Abstract

This invention discloses a multifunctional mobile structural test chamber for university students, belonging to the technical field of civil engineering teaching experimental equipment. It includes a frame-type main body with a mobile load-bearing component at the bottom for free movement and fixed-point positioning; a modular loading component slidably mounted at the top, which can move along a transverse guide rail to apply loads to specimens of different sizes; an integrated sensing and acquisition component that simultaneously acquires multiple physical quantities through strain, vibration, and deflection testing modules and a synchronous multi-channel acquisition interface; an integrated control and power supply component with a built-in lithium battery pack, data acquisition module, and display terminal responsible for power supply, data reception and processing, and experimental data display; and a detachable specimen fixing fixture component at the bottom for securing the structural specimen to be tested. This invention achieves high-precision synchronous testing of multiple physical quantities and portable use in all scenarios, reducing equipment costs while improving the efficiency and intuitiveness of teaching experiments.

Description

Technical Field

[0001] This invention belongs to the technical field of teaching and experimental equipment for civil engineering, and particularly relates to a multifunctional mobile structural test box for university students. Background Technology

[0002] Currently, the structural testing equipment used by civil engineering majors in domestic universities for teaching experiments and scientific and technological innovation competitions in courses such as structural mechanics and engineering vibration mainly falls into two categories. One type is a fixed, large-scale structural test bench, consisting of a concrete base, a heavy steel frame, a fixed vertical loading actuator, and multiple independent acquisition devices. The loading actuator is rigidly fixed to the top of the bench, the loading point cannot be adjusted laterally, and the specimen can only be installed at a fixed position in the laboratory; the entire set of equipment cannot be moved. The other type is a small, modular teaching testing instrument, pieced together from independent loading devices, strain acquisition boxes, vibration testing modules, deflection detection equipment, etc. These instruments lack a unified load-bearing housing and integrated moving structure; the sensor interfaces of different modules are inconsistent and not interchangeable; and the loading equipment, acquisition equipment, and specimen fixtures are separate, requiring temporary wiring and assembly on-site for each experiment.

[0003] The two types of equipment mentioned above have revealed many common problems in use. Since their design is centered on laboratory-based fixed-point testing, the equipment is either too heavy to move or lacks an integrated housing and wheels, making it difficult to transport and bringing into classrooms or outdoor venues for teaching demonstrations and scientific research debugging. Furthermore, strain, vibration, deflection, and loading functions are handled by multiple independent instruments, requiring repeated disassembly and switching of equipment for comprehensive experiments. The time-sharing of data from multiple devices leads to mismatched data sequences, and universities need to purchase multiple systems, resulting in high procurement and maintenance costs. The loading mechanism has a fixed position, and the support fixture uses an integrated design, only suitable for single-type components such as simply supported beams, making it impossible to quickly switch to test cantilever beams, small frames, or scaled-down plate models. In addition, all equipment requires external mains power and lacks built-in energy storage devices, making it unusable in classrooms, outdoor competition venues, or other locations without power supply. The limited number of acquisition channels and low sampling frequency make it difficult to simultaneously acquire multi-section strain and multi-point vibration signals. Various sensors, cables, and tooling accessories lack dedicated storage space, leading to scattered stacking and easy loss, time-consuming organization before and after experiments, and messy wiring.

[0004] In summary, existing equipment suffers from problems such as strong site constraints, fragmented functions and low integration, poor compatibility with test specimens, reliance on mains power, insufficient portability, chaotic accessory management, and difficulty in synchronously collecting data on multiple physical quantities. As a result, it is difficult to meet the diverse experimental needs of undergraduate students in courses, innovation and entrepreneurship training, and structural science and technology innovation competitions. Summary of the Invention

[0005] This invention aims to specifically address the following technical problems: This solves the problem of traditional large-scale test benches and split-type test instruments being unable to move freely, limiting them to dedicated laboratories and preventing them from entering classrooms or outdoor venues for classroom demonstrations and debugging of scientific and technological innovation models. This addresses the problems of fragmented functions, such as independent equipment for strain, vibration, deflection, and static loading, high procurement costs for complete sets, frequent instrument switching required for integrated experiments, asynchronous data timing among multiple devices, cumbersome experimental operations, and low testing efficiency. This addresses the problem that existing loading mechanisms have fixed points and non-replaceable test specimen fixtures, which can only adapt to a single type of scaled-down component and are incompatible with various civil engineering models such as simply supported beams, cantilever beams, and small frames. To address the limitations of existing equipment that requires external AC power, lacks built-in energy storage, and cannot be used for experiments in situations where there is no power source; This addresses the shortcomings of existing small-scale data acquisition devices, such as limited channel count, low sampling frequency, difficulty in synchronously acquiring multiple physical quantities, and insufficient synchronization and accuracy of experimental data. This solution addresses the management challenges of lacking a unified storage space for sensors, tooling, cables, and other accessories, resulting in messy experimental wiring, easy loss of accessories, and time-consuming equipment organization.

[0006] To solve the above-mentioned technical problems, the present invention provides a multifunctional mobile structural test chamber for university teaching, comprising: The main body of the box is a frame structure used to support the various components; A mobile load-bearing component is fixedly installed at the bottom of the main body of the chamber to enable the movement and fixed position of the test chamber. A modular loading component is slidably installed at the top of the inside of the main body of the box, and is used to apply loads to structural specimens placed inside the main body of the box; The sensing and acquisition components are integrated inside the main body of the box, including a strain testing module, a vibration testing module and a deflection testing module, and are equipped with a synchronous multi-channel acquisition interface for synchronously acquiring strain, vibration and deflection data of the structural specimen during loading. An integrated control and power supply component is located inside the main body of the enclosure, including a lithium battery pack, a data acquisition module, and a display terminal. The lithium battery pack provides power to each component, the data acquisition module is used to receive and process the data collected by the sensing and acquisition components, and the display terminal is used to display the experimental data. The specimen fixing fixture assembly is detachably installed at the bottom of the inside of the main body of the box, and is used to fix the structural specimen to be tested.

[0007] Optionally, the main body of the box adopts an aluminum alloy frame structure, and a transparent observation plate is fixedly installed on its side wall; the external dimensions of the main body of the box are 80cm×60cm×70cm, and the overall weight is no more than 35kg.

[0008] Optionally, the mobile load-bearing component includes four casters with braking function, which are symmetrically arranged at the four corners of the bottom of the main body of the box.

[0009] Optionally, the modular loading assembly includes a lateral sliding guide rail, an electric loading device, a manual fine-tuning device, and a pressure sensor; The transverse sliding guide rail is fixedly installed inside the top of the box body. The electric loading device is slidably installed on the transverse sliding guide rail. The manual fine-tuning device is set on the side of the electric loading device for fine adjustment of the loading position. The pressure sensor is set on the loading end of the electric loading device for real-time detection of the loading force.

[0010] Optionally, the electric loading device is an electric jack, and the manual fine-tuning device is a manual fine-tuning knob.

[0011] Optionally, the sensing and acquisition component is an eight-channel synchronous acquisition structure with a maximum sampling frequency of 2000Hz. Optionally, each channel of the sensing and acquisition component is equipped with a standardized sensor interface, which is connected to a strain gauge, a piezoelectric accelerometer and a laser deflectometer, respectively, for acquiring static strain, dynamic strain, vibration acceleration, structural natural frequency and deflection data.

[0012] Optionally, the lithium battery pack has a single-charge battery life of not less than eight hours, the data acquisition module includes a wireless data acquisition unit, which is used to wirelessly transmit experimental data to an external terminal, and the display terminal is a touch display terminal, which is used to display experimental data and change curves in real time.

[0013] Optionally, the specimen fixing fixture assembly includes a simply supported beam support, a cantilever beam fixing clamp, and a frame fixing base. All three fixtures can be detachably installed at the bottom of the box body to adapt to the fixing and installation of beam-type components, column-type components, and small frame-type scaled-down structure specimens, respectively.

[0014] Optionally, the main body of the housing is also provided with a storage slot, which is a closed structure, for storing the matching sensors and data cables of the sensing and acquisition component and the matching tooling accessories of the specimen fixing tooling component.

[0015] Compared with the prior art, the present invention has the following advantages and technical effects: First, this invention integrates the main body of the enclosure, the mobile load-bearing component, the modular loading component, the sensing and acquisition component, the integrated control and power supply component, and the specimen fixing fixture component into a single unit, changing the traditional form of independent and dispersed arrangement of instruments in experimental equipment. The mobile load-bearing component is fixed to the bottom of the enclosure, allowing the equipment to move freely and be fixed at any location. Combined with the lightweight frame structure of the enclosure, the entire set of equipment can be easily transported by a single person, thus expanding structural mechanics experiments from dedicated laboratories to diverse scenarios such as classrooms and outdoors, effectively breaking through the dependence of traditional equipment on fixed sites. At the same time, the components integrated into the same enclosure do not require repeated disassembly and assembly or on-site wiring, significantly shortening the experimental preparation time.

[0016] Secondly, the modular loading component is slidably installed at the top of the box, and the loading point can be flexibly adjusted according to the specimen size and loading requirements. Together with the specimen fixing fixture component that can be detachably installed at the bottom of the box, the corresponding fixture can be quickly changed according to different experimental contents. It is suitable for various types of scaled models such as beam components, column components and small frames, which significantly improves the equipment's versatility for different specimens and different experimental projects. One set of equipment can cover the core teaching experiments of multiple courses such as structural statics and engineering vibration.

[0017] Furthermore, the sensing and acquisition component integrates strain testing, vibration testing, and deflection testing modules, and is equipped with a synchronous multi-channel acquisition interface. This allows for the synchronous acquisition of multiple physical quantities such as strain, vibration, and deflection of the structural specimen during loading using the same device. This eliminates the data timing misalignment error caused by the asynchronous operation of multiple instruments in traditional split-type devices, ensuring the synchronization and accuracy of experimental data.

[0018] Furthermore, the integrated control power supply component incorporates a built-in lithium battery pack, enabling the equipment to operate independently without external mains power. This allows experiments to be conducted normally in locations without power access, such as classrooms and outdoor competition venues, eliminating the dependence of traditional equipment on fixed power supply facilities and further expanding the equipment's application range. The data acquisition module receives and processes sensor signals in real time, and the display terminal presents experimental data intuitively, lowering the barrier to experimental operation and allowing students to conveniently complete multiple structural mechanics tests on the same equipment, improving the efficiency and intuitiveness of teaching experiments.

[0019] In summary, this invention comprehensively solves the technical problems existing in the prior art from multiple aspects, such as equipment integration, mobility, multi-condition universality, simultaneous acquisition of multiple physical quantities, and independent power supply. It provides a comprehensive testing platform with a compact structure, full functionality, and convenient use for teaching experiments and scientific and technological innovation activities in civil engineering in universities. Attached Figure Description

[0020] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a schematic diagram of the overall three-dimensional structure of an embodiment of the present invention; Figure 2 This is a connection block diagram of the sensing and acquisition system according to an embodiment of the present invention; Figure 3 This is a schematic diagram of a simply supported beam test according to an embodiment of the present invention, wherein (a) is a schematic diagram of the test arrangement of the simply supported beam, and (b) is a schematic diagram of the arrangement of measuring points of the simply supported beam. Figure 4 This is a schematic diagram of a cantilever beam test according to an embodiment of the present invention, wherein (a) is a schematic diagram of the cantilever beam test layout, and (b) is a schematic diagram of the cantilever beam measuring point layout; Figure 5 This is a schematic diagram of a cantilever column test according to an embodiment of the present invention, wherein (a) is a schematic diagram of the cantilever column test layout, and (b) is a schematic diagram of the cantilever column measuring point layout. Detailed Implementation

[0021] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0022] It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions, and although a logical order is shown in the flowchart, in some cases the steps shown or described may be executed in a different order than that shown here.

[0023] Example 1 This embodiment provides a multifunctional mobile structural test chamber for university teaching, including: The main body of the box is a frame structure used to support the various components; A mobile load-bearing component is fixedly installed at the bottom of the main body of the chamber to enable the movement and fixed position of the test chamber. A modular loading component is slidably installed at the top of the inside of the main body of the box, and is used to apply loads to structural specimens placed inside the main body of the box; The sensing and acquisition components are integrated inside the main body of the box, including a strain testing module, a vibration testing module and a deflection testing module, and are equipped with a synchronous multi-channel acquisition interface for synchronously acquiring strain, vibration and deflection data of the structural specimen during loading. An integrated control and power supply component is located inside the main body of the enclosure, including a lithium battery pack, a data acquisition module, and a display terminal. The lithium battery pack provides power to each component, the data acquisition module is used to receive and process the data collected by the sensing and acquisition components, and the display terminal is used to display the experimental data. The specimen fixing fixture assembly is detachably installed at the bottom of the inside of the main body of the box, and is used to fix the structural specimen to be tested.

[0024] As a feasible implementation method, the multifunctional mobile structural test chamber for university teaching disclosed in this embodiment, such as Figure 1 As shown, the entire unit adopts a lightweight design with an aluminum alloy frame. The main body of the box is an aluminum alloy frame structure, with external dimensions of 80cm × 60cm × 70cm and an overall weight of no more than 35kg. It features a dual-purpose design for both carrying and pushing / pulling, allowing for single-person transport. Transparent acrylic observation panels are embedded in the side walls of the box, allowing for direct observation of the stress, deformation, and vibration of the test specimens during experiments. Four silent omnidirectional wheels with brakes are symmetrically fixed at the four corners of the bottom of the box, enabling free pushing and pulling of the equipment. When the brakes are locked, the equipment remains stable and does not shift or shake, ensuring experimental accuracy. The interior of the box has enclosed storage compartments on both sides for the categorized storage of the sensors, data cables, spare strain gauges, and supporting tooling accessories for the specimen fixing components. This achieves integrated storage management of the equipment, avoiding the loss of accessories and messy wiring.

[0025] The main body of the chamber features a horizontal sliding guide rail at its top. The modular loading assembly is slidably mounted on this rail and can move laterally along it, with a displacement range of 0 to 40 centimeters, thus adapting to the loading point adjustment requirements of specimens of different lengths. The modular loading assembly uses a small electric jack with a maximum loading force of 5 kN, paired with a manual fine-tuning knob located on the side of the electric jack, enabling automatic quantitative loading and precise micro-adjustment of the loading position. The loading end of the electric jack integrates a pressure sensor, which can collect the loading force value in real time and feed it back to the display terminal, achieving controllable and adjustable load.

[0026] The specimen fixing fixture assembly is detachably installed at the bottom of the main body of the box. This fixture assembly is a modular and detachable structure, including a simply supported beam support, a cantilever beam fixing clamp, and a frame fixing base. It can be quickly replaced according to experimental needs and is suitable for fixing and installing beam components, column components, and small frame-type scaled-down structure specimens.

[0027] The main body of the enclosure integrates sensor data acquisition components, such as... Figure 2As shown, the sensing and acquisition component is an eight-channel synchronous acquisition structure with a sampling frequency of up to 2000Hz, including a strain testing module, a vibration testing module, and a deflection testing module. Each channel is equipped with a standardized sensor interface for flexible connection to strain gauges, piezoelectric accelerometers, and laser deflectometers. Through these standardized sensor interfaces, the sensing and acquisition component can simultaneously acquire static strain, dynamic strain, vibration acceleration, structural natural frequency, damping ratio, and deflection data, achieving simultaneous acquisition and recording of multiple physical quantities.

[0028] The main body of the enclosure also integrates an integrated control and power supply component. This component has a built-in 12V high-capacity lithium battery pack, providing at least eight hours of continuous use on a single charge, allowing the device to operate independently without external mains power and meeting the needs of all-day experiments. The integrated control and power supply component also includes a wireless data acquisition module and a touch display terminal. The wireless data acquisition module receives and processes data collected by the sensor acquisition component and wirelessly transmits the experimental data to a computer or tablet terminal, while also supporting real-time data storage and export to a USB flash drive. The touch display terminal is embedded in the front of the enclosure and displays load values, strain time history curves, vibration spectrum curves, and deflection change data in real time, facilitating students' recording of experimental data and analysis of results.

[0029] Take three typical experiments as examples: Simply supported beam test. (For example...) Figure 3 As shown, during the simply supported beam test, the simply supported beam support is first installed at the bottom of the box girder. The simply supported beam support is an embedded component, inserted into the groove of the aluminum alloy beam, and includes a first support and a second support. The first support is a single fixed component, while the second support consists of a lower fixed component and an upper round steel bar. The round steel bar can roll on the fixed component, thus simulating the support conditions of the simply supported beam specimen with one end fixed hinged and the other end rolling hinged. The scaled-down simply supported beam specimen is fixed to the support, and strain gauges are attached to the surface of the specimen, such as... Figure 3 As shown in (b), multiple measuring points are set along the beam span. Based on the specimen length, the modular loading assembly is slid to the predetermined loading point along the transverse sliding guide rail. The lithium battery pack is powered on via the touch display terminal, activating the sensing and data acquisition components and the wireless data acquisition module. An electric jack is used to apply a vertical load to the specimen, while the loading position is precisely adjusted using a manual fine-tuning knob. The pressure sensor collects the loading force value in real time and displays it on the touch terminal. During loading, strain gauges, accelerometers, and laser deflectometers collect strain, vibration, and deflection signals respectively. The sensing and data acquisition components synchronously collect data from each channel at a sampling frequency of up to 2000Hz. The collected data is processed by the wireless data acquisition module and transmitted in real time to the touch display terminal for curve display. It can also be projected to a computer or tablet terminal via wireless network for teaching demonstrations.

[0030] Cantilever beam test. For example...Figure 4 As shown, during the cantilever beam test, the simply supported beam support is removed and replaced with a cantilever beam fixing fixture. The cantilever beam fixing fixture includes a third support, which consists of a lower fixing component and an upper adjustable fastener. The adjustable fastener is adjusted using bolts. By tightening the bolts, one end of the cantilever beam specimen is clamped and fixed, forming the cantilever support boundary condition. The scaled-down cantilever beam specimen is fixed in the fixture, and multiple strain measurement points are arranged along the beam length on the specimen surface, such as... Figure 4 As shown in (b) of the figure. Following the same data acquisition and loading procedures as the simply supported beam test, dynamic response tests of cantilever beams under concentrated loads at the ends or mid-span can be carried out to determine the natural frequency, damping ratio, and deflection variation of the cantilever beam.

[0031] Cantilever column test. (For example...) Figure 5 As shown, during the cantilever column test, the frame fixing base is installed at the bottom of the box. A fourth support is installed on the frame fixing base; this fourth support is a single fixing component. The scaled-down test column is adhesively bonded to the surface of the fourth support, forming a cantilever column boundary condition where the column base is fixed and the column top is free. Multiple strain measurement points are arranged along the height direction on the column surface, such as... Figure 5 As shown in (b), displacement sensors and acceleration sensors are simultaneously arranged at the top of the column and in the middle of the column. Following the same loading and data acquisition process, experiments can be conducted on the strain distribution, buckling deformation, and vibration characteristics of the cantilever column under horizontal or vertical loads.

[0032] After the experiment is completed, the sensors, data cables and tooling accessories can be sorted and stored in the closed storage slots on both sides of the box.

[0033] This embodiment achieves the following technical effects through the above technical solution: This invention integrates the main body of the enclosure, the mobile load-bearing component, the modular loading component, the sensing and acquisition component, the integrated control and power supply component, and the specimen fixing fixture component into one unit, changing the traditional form of independent and dispersed arrangement of instruments in testing equipment. The mobile load-bearing component is symmetrically fixed to the bottom of the enclosure with four braked silent universal wheels. Combined with the lightweight aluminum alloy frame structure of the enclosure (overall dimensions 80cm×60cm×70cm, weight ≤35kg), the entire set of equipment can be easily transported by a single person using a push-pull handle. This expands structural mechanics experiments from dedicated laboratories to diverse scenarios such as classrooms and outdoors, effectively breaking through the dependence of traditional equipment on fixed sites. The applicable site scenarios can be expanded by more than three times compared to traditional equipment. At the same time, the components integrated into the same enclosure do not require repeated disassembly and assembly or on-site wiring. The preparation time for a single experiment is reduced from more than forty minutes for traditional equipment to ten minutes, and the overall testing efficiency is improved by about 75%.

[0034] The modular loading component is slidably installed on the transverse sliding guide rail at the top of the box, allowing for lateral displacement within a range of 0 to 40 centimeters. The loading point can be flexibly adjusted according to the specimen size and loading requirements. In conjunction with the specimen fixing fixture component that can be detachably installed at the bottom of the box, the simply supported beam support, cantilever beam fixing clamp, or frame fixing base can be quickly changed within five minutes according to different experimental contents. It is suitable for various types of scaled models such as beam components, column components, and small frames, without the need to purchase additional matching fixtures. This significantly improves the equipment's versatility for different specimens and different experimental projects. A single device can complete more than ten core teaching experiments in civil engineering, covering all basic experimental projects in undergraduate courses such as structural mechanics and engineering vibration.

[0035] The sensing and acquisition component is an eight-channel synchronous acquisition structure, integrating strain testing, vibration testing, and deflection testing modules. Each channel has a standardized sensor interface, allowing flexible connection to strain gauges, piezoelectric accelerometers, and laser deflectometers. Sensor signals from all channels are synchronously acquired through the same device, with a sampling frequency up to 2000Hz. It can simultaneously acquire six types of mechanical parameters: static strain, dynamic strain, vibration acceleration, structural natural frequency, damping ratio, and deflection. This eliminates the data timing misalignment errors introduced by the independent operation and time-sharing of multiple instruments in traditional split-type devices. The data synchronization error is controlled within 0.1 milliseconds, ensuring the synchronization and accuracy of experimental data. The pressure sensor integrated at the loading end achieves a load acquisition accuracy of ±1%, meeting the accuracy requirements of undergraduate teaching and basic scientific and technological innovation experiments.

[0036] The integrated control and power supply component features a built-in 12V high-capacity lithium battery pack, providing at least eight hours of continuous use on a single charge. This allows the device to operate independently without external AC power, enabling experiments to be conducted in locations without power access, such as classrooms and outdoor competition venues. It can operate continuously throughout the day without external AC power, eliminating the dependence on fixed power supply facilities and further expanding the device's application range. The wireless data acquisition module supports real-time wireless transmission of experimental data to computers or tablets, and also supports local storage and export via USB flash drive, facilitating teaching demonstrations and student data recording and analysis. The touch display terminal embedded in the front of the enclosure can display load values, strain time history curves, vibration spectrum curves, and deflection change data in real time, lowering the barrier to experimental operation. Students with no prior experience can independently complete a full test within ten minutes.

[0037] The enclosure features integrated enclosed storage compartments on both sides, allowing sensors, strain gauges, data cables, and various tooling accessories to be stored inside. This eliminates the problems of lost accessories and messy wiring, reducing the annual accessory loss rate of approximately 15% for traditional split equipment to zero and lowering laboratory accessory management costs and organization time.

[0038] In terms of economic benefits, this invention integrates all the functions of a traditional set of separate testing equipment (static loading platform, strain acquisition instrument, vibration analyzer, and laser deflection device) into a single device. The procurement cost can be controlled within one-third of the total price of traditional equipment, reducing the procurement cost of a single set of equipment by about 67%. When university laboratories purchase in bulk, the investment in teaching equipment can be significantly reduced. At the same time, there is no need to build a dedicated structural mechanics laboratory, saving the cost of modifying the concrete base of a large test platform and dedicated power supply lines. The equipment is lightweight and easy to transport, eliminating the costs of hoisting and maintaining large equipment. The annual operation and maintenance costs are reduced by 80% compared to traditional large test platforms.

[0039] In terms of teaching and social benefits, the transparent plexiglass observation panel on the side wall of the enclosure visualizes the deformation and vibration of the specimens during experiments. Teachers can bring the equipment directly into the classroom for on-site demonstrations, breaking down the teaching barriers that separate theoretical classes from the laboratory. The equipment's portability, low cost, and multi-functionality make it suitable for undergraduate structural design competitions and innovation and entrepreneurship training projects, lowering the hardware threshold for civil engineering students to conduct innovative experiments and patent development. Its lightweight and low-cost design allows local second-tier universities and vocational colleges to configure it in batches, making up for the lack of structural experimental equipment in grassroots colleges and helping to balance experimental teaching resources in civil engineering.

[0040] The above are merely preferred embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A multifunctional mobile structural test chamber for university teaching, characterized in that, include: The main body of the box is a frame structure used to support the various components; A mobile load-bearing component is fixedly installed at the bottom of the main body of the chamber to enable the movement and fixed position of the test chamber. A modular loading component is slidably installed at the top of the inside of the main body of the box, and is used to apply loads to structural specimens placed inside the main body of the box; The sensing and acquisition components are integrated inside the main body of the box, including a strain testing module, a vibration testing module and a deflection testing module, and are equipped with a synchronous multi-channel acquisition interface for synchronously acquiring strain, vibration and deflection data of the structural specimen during loading. An integrated control and power supply component is located inside the main body of the enclosure, including a lithium battery pack, a data acquisition module, and a display terminal. The lithium battery pack provides power to each component, the data acquisition module is used to receive and process the data collected by the sensing and acquisition components, and the display terminal is used to display the experimental data. The specimen fixing fixture assembly is detachably installed at the bottom of the inner side of the main body of the box, and is used to fix the structural specimen to be tested.

2. The test chamber according to claim 1, characterized in that, The main body of the box adopts an aluminum alloy frame structure, and a transparent observation plate is fixedly installed on its side wall; the external dimensions of the main body of the box are 80cm×60cm×70cm, and the overall weight is no more than 35kg.

3. The test chamber according to claim 1, characterized in that, The mobile load-bearing component includes four casters with braking function, which are symmetrically arranged at the four corners of the bottom of the main body of the box.

4. The test chamber according to claim 1, characterized in that, The modular loading assembly includes a transverse sliding guide rail, an electric loading device, a manual fine-tuning device, and a pressure sensor. The transverse sliding guide rail is fixedly installed inside the top of the box body. The electric loading device is slidably installed on the transverse sliding guide rail. The manual fine-tuning device is set on the side of the electric loading device for fine adjustment of the loading position. The pressure sensor is set on the loading end of the electric loading device for real-time detection of the loading force.

5. The test chamber according to claim 4, characterized in that, The electric loading device is an electric jack, and the manual fine-tuning device is a manual fine-tuning knob.

6. The test chamber according to claim 1, characterized in that, The sensing and acquisition component is an eight-channel synchronous acquisition structure with a maximum sampling frequency of 2000Hz.

7. The test chamber according to claim 6, characterized in that, Each channel of the sensing and acquisition component is equipped with a standardized sensor interface, which is connected to a strain gauge, a piezoelectric accelerometer and a laser deflectometer, respectively, for acquiring static strain, dynamic strain, vibration acceleration, structural natural frequency and deflection data.

8. The test chamber according to claim 1, characterized in that, The lithium battery pack has a single-charge battery life of no less than eight hours. The data acquisition module includes a wireless data acquisition unit, which is used to wirelessly transmit experimental data to an external terminal. The display terminal is a touch display terminal, which is used to display experimental data and change curves in real time.

9. The test chamber according to claim 1, characterized in that, The specimen fixing fixture assembly includes a simply supported beam support, a cantilever beam fixing clamp, and a frame fixing base. All three fixtures can be detachably installed at the bottom of the box body to accommodate the fixing and installation of beam-type components, column-type components, and small frame-type scaled-down structure specimens, respectively.

10. The test chamber according to claim 1, characterized in that, The main body of the box is also provided with a storage slot, which is a closed structure, for storing the matching sensors and data cables of the sensing and acquisition component, as well as the matching tooling accessories of the specimen fixing tooling component.

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