Rapidly deployable servo exciter for structural vibration testing

Abstract

This invention relates to the field of equipment for vibration testing in civil engineering, specifically to a rapidly deployable servo-type vibrator for structural vibration testing. It includes a movable base with a servo control system mounted on it. The servo control system includes a crossbeam mounted on the movable base, on which a threaded rod driven by a drive mechanism for lifting and deflection is vertically mounted. A vibrator is longitudinally mounted at the lower end of the threaded rod, and a hammer is mounted at the front end of the vibrator. A force sensor and an acceleration sensor are located between the hammer and the vibrator. An adjustable counterweight device is located at the rear of the vibrator. A rapid centering system electrically connected to the servo control system is also included. This vibrator is suitable for a wider range of objects requiring structural vibration testing and is easy to operate.

Description

Technical Field

[0001] This invention relates to the field of equipment for vibration testing experiments in civil engineering, and specifically to a rapidly deployable servo exciter for structural vibration testing. Background Technology

[0002] Vibration testing equipment in civil engineering is an essential tool in the field. It is primarily used to test and study the performance and stability of various civil engineering structures, such as bridges, high-rise buildings, ships, and aircraft, under vibration loads. With the continuous development of civil engineering technology, vibration testing equipment also needs constant updating and improvement to meet more precise and complex testing requirements. Modern vibration testing equipment in civil engineering can be used not only for vibration performance evaluation of civil engineering structures but also for structural design and optimization, construction quality monitoring, and many other aspects. It provides strong support for structural performance evaluation, research and development of new materials and technologies, health monitoring and damage assessment, teaching and training, and vibration control technology research. Vibration testing equipment plays a wide and important role in the field of civil engineering. With the continuous development of science and technology, vibration testing equipment will continue to play an even greater role in civil engineering, promoting the continuous progress and development of the civil engineering industry.

[0003] Based on existing data, current civil engineering vibration testing equipment has the following problems:

[0004] (1) The structural vibration test equipment requires precise control of the drop height and speed of the exciter in order to generate the required impact energy. However, in actual operation, due to the influence of various factors, such as air resistance and friction, it is difficult to achieve precise energy control, which affects the accuracy of the experimental results. At the same time, a large amount of data will be generated during the structural vibration test, including impact energy, structural deformation, stress distribution, etc., which will also increase the difficulty of data processing.

[0005] (2) The installation process of existing structural vibration testing equipment often involves multiple steps and components, which is complex and time-consuming. This not only increases the workload of the testers but also affects the progress and efficiency of the experiment. In addition, negligence or errors during the installation process may lead to a decrease in equipment performance or malfunction, which will affect the accuracy of the experimental results.

[0006] Therefore, the development of a rapidly deployable servo exciter for structural vibration testing has promoted the development of vibration testing equipment for civil engineering, and is of great significance in improving the ease of operation, accuracy and stability of the equipment, as well as optimizing data analysis technology. Summary of the Invention

[0007] The purpose of this invention is to provide a rapidly deployable servo exciter for structural vibration testing. This exciter is applicable to a wider range of objects requiring structural vibration testing and is easy to operate.

[0008] The technical solution of this invention is as follows: a rapidly deployable servo exciter for structural vibration testing, comprising a movable base, a servo control system mounted on the movable base, the servo control system including a crossbeam mounted on the movable base, a threaded rod vertically mounted on the crossbeam and driven by a drive mechanism for lifting and deflection, an exciter longitudinally mounted at the lower end of the threaded rod, a hammer head mounted at the front end of the exciter, a force sensor and an acceleration sensor positioned between the hammer head and the exciter, and an adjustable counterweight device positioned at the rear of the exciter; a rapid centering system electrically connected to the servo control system is also provided.

[0009] Furthermore, the movable seat includes a base with casters at the bottom, a support frame fixed on the base, and a crossbeam installed on the upper end of the support frame.

[0010] Furthermore, the base is equipped with casters at the four corners on its lower side, and the support frame includes triangular side frames fixed to both sides of the base. A support rod fixed to the base is vertically arranged in the middle of the triangular side frame, and the crossbeam is installed at the upper end of the two triangular side frames.

[0011] Furthermore, the drive mechanism includes an electro-hydraulic servo hydraulic power control system mounted on the crossbeam, the threaded rod is driven by the electro-hydraulic servo hydraulic power control system, the crossbeam is provided with a rotating section rotatably connected to it and used for the threaded rod to pass through, and an escapement mechanism controlled by a winch and cooperating with the threaded rod is mounted on the lower side of the electro-hydraulic servo hydraulic power control system.

[0012] Furthermore, the rapid alignment system includes a microcomputer and an alignment system, which is located behind the accelerometer.

[0013] Compared with the prior art, the present invention has the following advantages:

[0014] (1) This invention takes into account the current fixed vibration test device, realizes the mobility and freedom of the test device, and one device can adapt to more objects that need to be tested for structural vibration. It is mainly aimed at the testing and research of the performance and stability of bridges, high-rise buildings, ships, aircraft, etc. under vibration load, and realizes the simplicity of deployment and the convenience of operation.

[0015] (2) It can be moved to a suitable position along the target object as needed. The moving seat can move in different directions to meet the test position requirements of different target objects. For larger structural vibration test objects, it is inconvenient to move them, but the moving seat can meet the test position requirements of different target objects. It can be quickly arranged to achieve a one-to-many effect. The device does not need to be disassembled and reinstalled, which is convenient for structural vibration testing and improves the ease of operation of the device.

[0016] (3) A high-performance rigid threaded rod is adopted, and the servo exciter can rotate around the bearing at an angle of up to 135 degrees when it oscillates. ° This makes the operation of the servo exciter simpler and its stability higher during impact testing.

[0017] (4) The electro-hydraulic servo oil source control system is used to adjust the height of the rigid threaded rod. The escapement mechanism and winch are used to control the falling height and speed of the vibrator during operation, and can maintain stability, reducing the difficulty of unnecessary data processing.

[0018] (5) When combined with a microcomputer, it can process a large amount of data. The servo exciter reduces the influence of a large number of human and environmental factors, making the amount of data processing in the later stage smaller and easier. Attached Figure Description

[0019] Figure 1 This is a front view of the present invention;

[0020] Figure 2 This is a side view of the present invention;

[0021] Figure 3 This is a schematic diagram of an embodiment of the present invention;

[0022] In the diagram: 1. Movable seat; 101. Base; 102. Casters; 103. Support frame; 104. Triangular side frame; 105. Support rod; 2. Servo control system; 201. Threaded rod; 202. Electro-hydraulic oil source control system; 203. Crossbeam; 204. Escapement mechanism; 205. Winch; 206. Vibrator; 207. Hammer; 208. Force sensor; 209. Acceleration sensor; 210. Counterweight device; 211. Rotating section; 3. Rapid centering system; 301. Microcomputer. Detailed Implementation

[0023] To make the above features and advantages of the present invention more readily understood, specific embodiments are described below in conjunction with the accompanying drawings, but the present invention is not limited thereto.

[0024] refer to Figures 1 to 3

[0025] A rapidly deployable servo-driven vibrator for structural vibration testing includes a movable base 1, which can be moved to the desired location for structural vibration testing as needed. A servo control system 2 is mounted on the movable base. The servo control system includes a crossbeam 203 mounted on the movable base. A threaded rod 201, driven by a drive mechanism for lifting and deflection, is vertically mounted on the crossbeam. A vibrator 206 is longitudinally mounted at the lower end of the threaded rod. A hammer 207 is mounted at the front end of the vibrator. A force sensor 208 and an acceleration sensor 209 are located between the hammer and the vibrator. An adjustable counterweight device 210 is located at the rear of the vibrator, which can adjust the counterweight of the vibrator to achieve the required data loading range. A rapid alignment system 3, electrically connected to the servo control system, is also included.

[0026] In this embodiment, the movable seat includes a base 101 with casters at the bottom, a support frame 103 fixed on the base, and a crossbeam installed on the upper end of the support frame.

[0027] In this embodiment, casters are provided at the four corners of the lower side of the base. The support frame includes triangular side frames 104 fixed to both sides of the base. A support rod 105 fixed to the base is vertically arranged in the middle of the triangular side frames. The crossbeam is installed at the upper end of the two triangular side frames. The servo-type load exciter adjusts and changes its position through a movable seat to reach the location where structural vibration testing is required.

[0028] In this embodiment, the driving mechanism includes an electro-hydraulic servo oil source control system mounted on the crossbeam. The threaded rod is driven by the electro-hydraulic servo oil source control system, which controls the height of the vibrator as needed.

[0029] In this embodiment, a rotating section 211 is provided on the crossbeam for the threaded rod to pass through. An escapement mechanism 204, controlled by a winch 205 and cooperating with the threaded rod, is installed on the lower side of the electro-hydraulic servo oil source control system. This allows the escapement mechanism and winch to control the rotation of the rotating section according to the force required for the test, thereby controlling the position of the vibrator's swing. Based on the data from the first application of the vibrator to the object to be tested, including the force applied to the object, the acceleration of the vibrator, and the angle between the vibrator and the crossbeam, the escapement mechanism and winch calculate the data through a microcomputer system, transmit commands to the escapement mechanism and winch for execution, escape the vibrator to prevent it from impacting the object again, and then adjust the vibrator to the required angle and configuration, executing the desired command data.

[0030] In this embodiment, the rapid alignment system includes a microcomputer 301 and an alignment system, which is located behind the accelerometer. The rapid alignment system is connected to a servo control system. The microcomputer can automatically control the servo control system, and the microcomputer sends commands to the alignment system, enabling it to quickly hit the designated target location. This alignment system is existing technology.

[0031] The above description is only a preferred embodiment of the present invention. For those skilled in the art, designing different forms of rapidly deployable servo exciters for structural vibration testing based on the teachings of the present invention does not require creative labor. All equivalent changes, modifications, substitutions and variations made in accordance with the scope of the patent applications of the present invention without departing from the principles and spirit of the present invention shall be covered by the present invention.

Claims

1. A rapidly deployable servo exciter for structural vibration testing, comprising a movable base, characterized in that, The movable base is equipped with a servo control system, which includes a crossbeam mounted on the movable base. A threaded rod, driven by a drive mechanism, is vertically mounted on the crossbeam and is raised, lowered, and deflected. A vibrator is longitudinally mounted at the lower end of the threaded rod, and a hammer is mounted at the front end of the vibrator. A force sensor and an acceleration sensor are located between the hammer and the vibrator. An adjustable counterweight device is located at the rear of the vibrator. A quick centering system electrically connected to the servo control system is also provided. The drive mechanism includes an electro-hydraulic servo oil source control system mounted on the crossbeam. The threaded rod is driven by the electro-hydraulic servo oil source control system. A rotating section is provided on the crossbeam and rotatably connected to the threaded rod for it to pass through. An escapement mechanism controlled by a winch and cooperating with the threaded rod is mounted below the electro-hydraulic servo oil source control system. The escapement mechanism and the winch control the rotation of the rotating section according to the force required for the test, thereby controlling the position of the vibrator's swing.

2. The rapidly deployable servo exciter for structural vibration testing according to claim 1, characterized in that, The movable seat includes a base with casters at the bottom, a support frame fixed on the base, and a crossbeam installed on the upper end of the support frame.

3. The rapidly deployable servo exciter for structural vibration testing according to claim 2, characterized in that, The base is equipped with casters at the four corners on its lower side. The support frame includes triangular side frames fixed to both sides of the base. A support rod fixed to the base is vertically arranged in the middle of the triangular side frame. The crossbeam is installed at the upper end of the two triangular side frames.

4. The rapidly deployable servo exciter for structural vibration testing according to claim 1, characterized in that, The rapid alignment system includes a microcomputer and an alignment system, which is located behind the accelerometer.

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