A frequency measurement system for dynamic stiffness test of elastic materials
By designing a dynamic stiffness test change frequency measurement system of elastomeric material including dynamic stiffness test module, data acquisition module, data analysis and processing module and automatic frequency conversion module, the problem of cumbersome and low efficiency of manual control frequency in traditional testing methods is solved, and high-precision and automated dynamic stiffness test and automatic frequency adjustment are achieved, and the optimal dynamic stiffness frequency of the material is found.
Patent Information
- Application Number
- CN202411950246.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-27
- Publication Date
- 2025-04-04
AI Technical Summary
Traditional elastomeric material dynamic stiffness testing methods manually control the test frequency, which is cumbersome and inefficient, making it difficult to accurately find the optimal dynamic stiffness frequency of the material.
Design a system for dynamic stiffness test variation frequency measurement of elastomeric materials. Through the coordinated operation of dynamic stiffness test module, data acquisition module, data analysis and processing module and automatic frequency conversion module, fully automatic dynamic stiffness test and frequency adjustment are realized, and dynamic stiffness, damping factor and damping ratio are accurately measured.
It realizes high accuracy, automation and high efficiency of dynamic stiffness tests of elastomeric materials, and can accurately find the optimal dynamic stiffness frequency of the material, improving the accuracy and reliability of the test data.
Smart Images
Figure CN119756741A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of test and experiment, in particular to a frequency measurement system for dynamic stiffness test of elastic material. Background Art
[0002] With the rapid development of modern industry, elastomer materials have been widely used in many fields due to their unique elastic properties. In the automobile manufacturing industry, elastomer materials are widely used to manufacture shock absorbing parts, seals, etc.
[0003] However, different application scenarios have different performance requirements for elastomeric materials, especially their dynamic stiffness characteristics under dynamic stress conditions, which have a crucial impact on the overall performance of the product, and traditional dynamic stiffness testing methods for elastomeric materials have many limitations. During the test process, it is often necessary to use a variety of complex instruments and equipment for manual operation and data collection. For example, for the measurement of force and displacement, independent sensors are required, and it is difficult to achieve high-precision synchronization during the data collection process, which easily leads to data errors. Moreover, most traditional testing methods use manual control of the test frequency, which is not only cumbersome and inefficient, but also difficult to accurately find the optimal dynamic stiffness frequency of the material. Summary of the invention
[0004] In view of the shortcomings of the prior art, the present invention provides a variable frequency measurement system for the dynamic stiffness test of elastomeric materials, which solves the different requirements for the dynamic stiffness characteristics of elastomeric materials under dynamic stress in different application scenarios. The system is crucial to the overall performance of the product. However, the traditional dynamic stiffness test method for elastomeric materials has the problem of cumbersome manual control of the test frequency, low efficiency and difficulty in accurately finding the optimal dynamic stiffness frequency.
[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: a dynamic stiffness test frequency measurement system for elastic material, including a dynamic stiffness test module, the dynamic stiffness test module realizes the full automatic dynamic stiffness test of elastic material through the changes of multiple displacement sensors, the changes of frequency, combined with the feedback data of load sensors, displacement sensors and high-sensitivity displacement sensors, as well as the test frequency, mean value and amplitude test parameters, the stiffness test module is connected to a data acquisition module, the data acquisition module is responsible for the displacement sensor data acquisition, the load sensor data acquisition and the high-sensitivity displacement sensor data acquisition, the data acquisition module is connected to a data analysis and processing module, the data analysis and processing module calculates the dynamic stiffness, damping factor and damping ratio parameters of the collected data in real time during the test, the The data analysis and processing module is connected to an automatic frequency conversion module, which automatically changes frequency according to the test parameters, and finds the dynamic stiffness of the optimal frequency by continuously increasing or decreasing the frequency; the automatic frequency conversion module is connected to a test report module, which records the environmental parameters of the test and the test result parameters; the data acquisition module is connected to a limited position emergency stop safety assurance module, which shows a correlated change in the dynamic stiffness of the elastomer material and the test frequency, and urgently shuts down the device when the threshold is exceeded; the data analysis and processing module is connected to a data storage module, which is connected to the data acquisition module, and stores real-time data and periodic data, and stores original data and calculated data processed by the data analysis and processing module.
[0006] Preferably, the dynamic stiffness test module includes: a test parameter setting module and a test control execution module. The test parameter setting module sets the test frequency, mean, and amplitude test parameters to provide a basic control basis for the entire test. The test control execution module controls the load or displacement of the electro-hydraulic servo testing machine to meet specified requirements based on the set parameters and sensor feedback data to achieve automated operation of the dynamic stiffness test.
[0007] Preferably, the automatic frequency conversion module includes a frequency parameter analysis module and a frequency adjustment execution module. The frequency parameter analysis module analyzes the relationship between the current test frequency and the dynamic stiffness parameters, and determines the direction and amplitude of the frequency adjustment in combination with the test objectives and requirements. The frequency adjustment execution module actually increases or decreases the test frequency of the electro-hydraulic servo testing machine based on the results of the frequency parameter analysis submodule.
[0008] Preferably, the data acquisition module includes a displacement sensor acquisition module, a load sensor acquisition module and a high-sensitivity displacement sensor acquisition module. The displacement sensor acquisition module is responsible for collecting the displacement change data of the elastomeric material during the test, and performing collection and transmission. The load sensor acquisition module collects the load data applied to the elastomeric material by the electro-hydraulic servo testing machine. The high-sensitivity displacement sensor acquisition module performs high-precision displacement data collection for small deformations or special deformations of the elastomeric material.
[0009] Preferably, the data storage module includes a raw data storage module and a calculation data storage module. The raw data storage module stores the unprocessed raw data collected by the data acquisition module, including various sensor data such as displacement and load. The calculation data storage module stores the calculation result data of dynamic stiffness, damping factor and damping ratio calculated by the data analysis and processing module.
[0010] Preferably, the data analysis and processing module includes a dynamic stiffness calculation module, a damping factor calculation module and a damping ratio calculation module. The stiffness calculation module calculates the dynamic stiffness parameters of the elastomer material using a specific calculation formula based on the data provided by the displacement sensor acquisition submodule and the load sensor acquisition submodule.
[0011] Preferably, the specific calculation formula in the stiffness calculation module is:
[0012] in: is the dynamic stiffness, is the dynamic force acting on the elastic body, is the corresponding dynamic displacement.
[0013] Preferably, the damping ratio calculation module calculates the damping factor by combining the dynamic stiffness calculation result and the variation characteristics of the displacement and load data. The specific calculation formula is:
[0014] in: is the damping factor, is the energy loss within one vibration cycle, is the amplitude of the vibration displacement.
[0015] Preferably, the damping ratio calculation module further calculates the damping ratio based on the damping factor calculation result, and the specific calculation formula is:
[0016] in: is the damping ratio, is the mass of the elastomer.
[0017] Preferably, the limit emergency stop safety assurance module includes a monitoring module, which monitors the operating status of the electro-hydraulic servo testing machine in real time, including test frequency, load, displacement, and vibration amplitude. The monitoring module is connected to a judgment module, which makes a judgment based on the data acquired by the monitoring submodule and the preset safety thresholds and rules to determine whether the current test status is safe. When an abnormality occurs, corresponding safety measures are triggered; the judgment module is connected to an execution module, which is started after the judgment submodule determines that safety measures need to be taken, triggering the emergency stop button.
[0018] The present invention provides a frequency measurement system for dynamic stiffness test of elastic materials. It has the following beneficial effects: 1. The present invention realizes the fully automatic dynamic stiffness test of elastomer materials through the coordinated operation of the dynamic stiffness test module, the data acquisition module, and the data analysis and processing module. With the help of the coordinated acquisition of multiple high-precision sensors and advanced data analysis algorithms, key parameters such as dynamic stiffness, damping factor, and damping ratio can be accurately obtained, effectively overcoming the problems of poor data synchronization and large errors caused by independent sensors in traditional test methods, and greatly improving the accuracy and reliability of test data.
[0019] 2. The automatic frequency conversion module of the present invention can automatically adjust the frequency according to the test parameters, and find the dynamic stiffness of the optimal frequency through continuous frequency increase and decrease operations. This function gets rid of the cumbersome and inefficient traditional manual control of test frequency, which not only greatly shortens the test time and improves the test efficiency, but also can more accurately determine the optimal dynamic stiffness frequency of the material, which is helpful for in-depth research on the dynamic characteristics of elastomer materials at different frequencies, and provides key technical support for its optimized application in different engineering fields.
[0020] 3. The present invention can more accurately quantify the dynamic characteristics of elastomer materials by using special calculation formulas to calculate the dynamic stiffness parameters, damping factor and damping ratio separately. The dynamic stiffness formula intuitively presents its anti-deformation ability, the damping factor formula accurately describes the energy dissipation, and the damping ratio formula clarifies the vibration attenuation rate, providing key data support for the performance optimization and engineering design of elastomer materials in multiple fields. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 is a system flow chart of the present invention; Figure 2 It is a flow chart of the stiffness test module of the present invention; Figure 3 This is a flow chart of the automatic frequency conversion module of the present invention; Figure 4 is a flow chart of the data storage module of the present invention; Figure 5 It is a flow chart of the data acquisition module of the present invention; Figure 6 It is a flow chart of the data analysis and processing module of the present invention; Figure 7 It is a flow chart of the limit emergency stop safety guarantee module of the present invention; Figure 8 It is a schematic diagram of the test force-average displacement hysteresis curve and displacement, average displacement-time curve of the present invention. DETAILED DESCRIPTION
[0022] The following will be combined with the drawings in the specification of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0023] Example: Please see attached Figure 1 - Attachment Figure 8 The embodiment of the present invention provides a frequency measurement system for dynamic stiffness test of elastic material, including a dynamic stiffness test module. The dynamic stiffness test module realizes full automatic dynamic stiffness test of elastic material through changes of multiple displacement sensors, changes of frequency, combined with feedback data of load sensor, displacement sensor and high-sensitivity displacement sensor, and test frequency, mean value and amplitude test parameters, and can understand the change of dynamic stiffness of elastic material. The stiffness test module is connected with a data acquisition module, which is responsible for displacement sensor data acquisition, load sensor data acquisition and high-sensitivity displacement sensor data acquisition, and provides the original data source for subsequent data analysis. The data acquisition module is connected with a data analysis and processing module, which calculates dynamic stiffness, damping factor and damping ratio parameters of the collected data in real time during the test, and provides strong support for the analysis of test results. The data analysis and processing module is connected with an automatic frequency conversion module, which automatically changes frequency according to test parameters, finds the dynamic stiffness of the best frequency by continuously increasing or decreasing the frequency, and automatically adjusts the frequency during the test to obtain more accurate dynamic stiffness data. The automatic frequency conversion module is connected to a test report module, which records the test environment parameters and test result parameters, and can display the dynamic stiffness parameters of different frequencies, so as to find the dynamic stiffness parameters of the elastomer material, and generate a test report according to the test results and environment, and intuitively present the test results; The data acquisition module is connected to a limit position emergency stop safety assurance module, which shows a correlation change with respect to the change in the dynamic stiffness of the elastic material and the change in the test frequency. Considering that too high or too low a frequency may affect the optimal test performance of the electro-hydraulic servo tester, including resonance, overshoot, and unstable control, the module has a limit position and emergency stop safety assurance scheme and method to ensure the safety and stability of the test; The data analysis and processing module is connected to a data storage module, which is connected to a data acquisition module. The data storage module stores real-time data and periodic data, and stores original data and calculated data processed by the data analysis and processing module to ensure the integrity and traceability of the test data.
[0024] The dynamic stiffness test module includes: a test parameter setting module and a test control execution module. The test parameter setting module sets the test frequency, mean value, and amplitude test parameters to provide a basic control basis for the entire test. The test control execution module controls the load or displacement of the electro-hydraulic servo test machine to meet the specified requirements according to the set parameters and sensor feedback data, and drives the test machine to perform periodic wave motion, while coordinating the data collection work of each sensor to realize the automatic operation of the dynamic stiffness test. The automatic frequency conversion module includes a frequency parameter analysis module and a frequency adjustment execution module. The frequency parameter analysis module analyzes the relationship between the current test frequency and the dynamic stiffness parameter, and determines the direction and amplitude of the frequency adjustment in combination with the test objectives and requirements. The frequency adjustment execution module actually increases or decreases the test frequency of the electro-hydraulic servo test machine according to the result of the frequency parameter analysis submodule, thereby realizing the automatic frequency adjustment function. The data acquisition module includes a displacement sensor acquisition module, a load sensor acquisition module and a high-sensitivity displacement sensor acquisition module. The displacement sensor acquisition module is responsible for collecting displacement change data of the elastic material during the test, obtaining relevant information through the displacement sensor connected to the elastic material, and performing preliminary data processing and transmission. The load sensor acquisition module collects the load data applied to the elastic material by the electro-hydraulic servo test machine to ensure the accuracy and real-time performance of the data and provide key data support for dynamic stiffness calculation. The high-sensitivity displacement sensor acquisition module performs high-precision displacement data acquisition for small deformation or special deformation of the elastic material to obtain more detailed material deformation information and improve the accuracy of dynamic stiffness measurement. The data storage module includes a raw data storage module and a calculation data storage module. The raw data storage module stores the unprocessed raw data collected by the data acquisition module, including displacement, load and other sensor data, to ensure the integrity and traceability of the data. The calculation data storage module stores the calculation result data of the dynamic stiffness, damping factor and damping ratio calculated by the data analysis and processing module, to facilitate subsequent query and analysis. The data analysis and processing module includes a dynamic stiffness calculation module, a damping factor calculation module and a damping ratio calculation module. The stiffness calculation module calculates the dynamic stiffness parameters of the elastic material using a specific calculation formula based on the data provided by the displacement sensor acquisition submodule and the load sensor acquisition submodule. The specific calculation formula is:
[0025] in: is the dynamic stiffness, is the dynamic force acting on the elastic body (which can be measured by the load cell), is the corresponding dynamic displacement (measured by the displacement sensor); The damping ratio calculation module calculates the damping factor by combining the dynamic stiffness calculation results and the variation characteristics of displacement and load data. The specific calculation formula is:
[0026] in: is the damping factor, is the energy loss during a vibration cycle (which can be estimated by integrating the force and displacement curves, etc.), is the amplitude of the vibration displacement; The damping ratio calculation module further calculates the damping ratio based on the damping factor calculation result. The specific calculation formula is:
[0027] in: is the damping ratio, is the mass of the elastomer; The limit emergency stop safety assurance module includes a monitoring module, which monitors the operating status of the electro-hydraulic servo testing machine in real time, including test frequency, load, displacement, and vibration amplitude. The monitoring module is connected to a judgment module, which makes a judgment based on the data obtained by the monitoring submodule and the preset safety threshold and rules to determine whether the current test status is safe. When an abnormality occurs, the corresponding safety measures are triggered; the judgment module is connected to an execution module, which is started after the judgment submodule determines that safety measures need to be taken, triggering the emergency stop button to stop the equipment from running, thereby ensuring the safety and stability of the test.
[0028] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A frequency measurement system for dynamic stiffness test of elastic materials, characterized in that: The invention comprises a dynamic stiffness test module, which realizes the full automatic dynamic stiffness test of the elastic material through the changes of multiple displacement sensors and frequency changes, combined with the feedback data of the load sensor, the displacement sensor and the high-sensitivity displacement sensor, as well as the test frequency, mean value and amplitude test parameters. The stiffness test module is connected with a data acquisition module, which is responsible for the displacement sensor data acquisition, the load sensor data acquisition and the high-sensitivity displacement sensor data acquisition. The data acquisition module is connected with a data analysis and processing module, which calculates the dynamic stiffness, damping factor and damping ratio parameters of the collected data in real time during the test. The data analysis and processing module is connected with an automatic frequency conversion module. The dynamic frequency conversion module automatically changes frequency according to the test parameters, and finds the dynamic stiffness of the optimal frequency by continuously increasing or decreasing the frequency; the automatic frequency conversion module is connected to a test report module, and the test report module records the environmental parameters of the test and the test result parameters; the data acquisition module is connected to a limited position emergency stop safety assurance module, and the limited position emergency stop safety assurance module shows a correlated change in the dynamic stiffness of the elastomer material and the test frequency, and urgently shuts down the device when the threshold is exceeded; the data analysis and processing module is connected to a data storage module, and the data storage module is connected to the data acquisition module, and the data storage module stores real-time data and periodic data, and stores original data and calculated data processed by the data analysis and processing module.
2. The system for measuring the frequency variation of the dynamic stiffness test of an elastic material according to claim 1, characterized in that: The dynamic stiffness test module includes: a test parameter setting module and a test control execution module. The test parameter setting module sets the test frequency, mean value, and amplitude test parameters to provide a basic control basis for the entire test. The test control execution module controls the load or displacement of the electro-hydraulic servo testing machine to meet the specified requirements based on the set parameters and sensor feedback data to achieve the automated operation of the dynamic stiffness test.
3. The system for measuring the frequency variation of the dynamic stiffness test of an elastic material according to claim 1, characterized in that: The automatic frequency conversion module includes a frequency parameter analysis module and a frequency adjustment execution module. The frequency parameter analysis module analyzes the relationship between the current test frequency and the dynamic stiffness parameter, and determines the direction and amplitude of the frequency adjustment in combination with the test objectives and requirements. The frequency adjustment execution module actually increases or decreases the test frequency of the electro-hydraulic servo testing machine based on the results of the frequency parameter analysis submodule.
4. The system for measuring the frequency variation of the dynamic stiffness test of an elastic material according to claim 1, characterized in that: The data acquisition module includes a displacement sensor acquisition module, a load sensor acquisition module and a high-sensitivity displacement sensor acquisition module. The displacement sensor acquisition module is responsible for collecting the displacement change data of the elastomer material during the test, and performing collection and transmission. The load sensor acquisition module collects the load data applied to the elastomer material by the electro-hydraulic servo testing machine. The high-sensitivity displacement sensor acquisition module performs high-precision displacement data collection for small deformations or special deformations of the elastomer material.
5. The system for measuring the frequency variation of the dynamic stiffness test of an elastic material according to claim 1, characterized in that: The data storage module includes a raw data storage module and a calculation data storage module. The raw data storage module stores the unprocessed raw data collected by the data acquisition module, including various sensor data such as displacement and load. The calculation data storage module stores the calculation result data of dynamic stiffness, damping factor and damping ratio calculated by the data analysis and processing module.
6. The system for measuring the frequency variation of the dynamic stiffness test of an elastic material according to claim 1, characterized in that: The data analysis and processing module includes a dynamic stiffness calculation module, a damping factor calculation module and a damping ratio calculation module. The stiffness calculation module calculates the dynamic stiffness parameters of the elastic material using a specific calculation formula based on the data provided by the displacement sensor acquisition submodule and the load sensor acquisition submodule.
7. The system for measuring the frequency variation of the dynamic stiffness test of an elastic material according to claim 6, characterized in that: The specific calculation formula in the stiffness calculation module is: ,in: is the dynamic stiffness, is the dynamic force acting on the elastic body, is the corresponding dynamic displacement.
8. The system for measuring the frequency variation of the dynamic stiffness test of an elastic material according to claim 6, characterized in that: The damping ratio calculation module calculates the damping factor by combining the dynamic stiffness calculation results and the variation characteristics of displacement and load data. The specific calculation formula is: ,in: is the damping factor, is the energy loss within one vibration cycle, is the amplitude of the vibration displacement.
9. The system for measuring the frequency variation of the dynamic stiffness test of an elastic material according to claim 6, characterized in that: The damping ratio calculation module further calculates the damping ratio based on the damping factor calculation result. The specific calculation formula is: ,in: is the damping ratio, is the mass of the elastomer.
10. The system for measuring the frequency variation of the dynamic stiffness test of an elastic material according to claim 1, characterized in that: The limit emergency stop safety guarantee module includes a monitoring module, which monitors the operating status of the electro-hydraulic servo test machine in real time, including the test frequency, load, displacement, and vibration amplitude. The monitoring module is connected to a judgment module, which makes a judgment based on the data obtained by the monitoring submodule and the preset safety threshold and rules to determine whether the current test status is safe. When an abnormality occurs, the corresponding safety measures are triggered; The judgment module is connected to an execution module, and the execution module is started after the judgment submodule determines that safety measures need to be taken, and triggers the emergency stop button.