CN110470440B - Elastomer performance test equipment and elastomer performance test method - Google Patents
Elastomer performance test equipment and elastomer performance test method Download PDFInfo
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M5/00—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings
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- G01M5/005—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings by determining deflection or stress by means of external apparatus, e.g. test benches or portable test systems
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
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- G01N2203/0075—Strain-stress relations or elastic constants
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Abstract
The invention discloses an elastomer performance test device which is characterized by comprising an upper computer, a main control module, a servo drive module, a servo electric cylinder, a test tool and an acquisition module, wherein the upper computer is provided with evaluation parameters, preloading control parameters and test control parameters; the servo electric cylinder is adopted to drive the test execution mechanism to test the elastomer to be tested, so that the equipment space is greatly reduced, the purchase cost can be greatly reduced by the servo electric cylinder, the equipment maintenance difficulty is reduced, the control technology of the servo electric cylinder is mature, and the technical support and the upgrading for a user are facilitated; the whole process is divided into a preloading process and a testing process, the influence of the stress of the elastomer to be tested on the test can be effectively eliminated through preloading, and the precision of the test result is improved.
Description
Technical Field
The invention relates to a device and a method for testing the performance of a part, in particular to a device and a method for testing the performance of an elastomer.
Background
The performance of the elastomer is tested, usually, test equipment is used for applying test action to the elastomer to be tested to obtain real-time pressure information, real-time displacement information and test time domain information of the elastomer to be tested in the test process, the real-time pressure information, the real-time displacement information and the test time domain information are sent to an upper computer by an acquisition module, the upper computer performs calculation processing to obtain the rigidity value and the lag angle of the elastomer to be tested, the rigidity value and the lag angle are compared with preset evaluation parameters to obtain a performance test result of the elastomer to be tested, and the test technology and the process of obtaining the performance test result of the; however, the existing MTS dynamic tester for testing elastomer products adopts a hydraulic servo valve to control an oil cylinder, and the system structure is more complex and is more suitable for laboratory test analysis; the equipment has the factors of large hydraulic noise, large occupied space of the equipment, high purchase cost and the like, is difficult to popularize and apply on a production line in a large scale, and the MTS dynamic test system is still in an industry monopoly state at present, so that the equipment has great limitation on user technical support and purchase cost.
Disclosure of Invention
The invention aims to provide elastic body performance testing equipment and an elastic body performance testing method which are compact in structure, economical and reliable.
The technical scheme adopted by the invention for solving the technical problems is as follows: an elastomer performance test device comprises an upper computer, a main control module, a servo drive module, a servo electric cylinder, a test tool and an acquisition module, wherein the upper computer is provided with evaluation parameters, preloading control parameters and test control parameters, the test tool comprises a test bench for placing an elastomer to be tested and a test execution mechanism which is movably arranged on the test bench and used for applying pressure on the elastomer to be tested, the upper computer sends the preloading control parameters and the test control parameters to the main control module, the main control module analyzes corresponding preloading control instructions according to the preloading control parameters and sends the preloading control instructions to the servo drive module, the servo drive module controls an output rod of the servo electric cylinder to synchronously drive the test execution mechanism to apply corresponding preloading actions on the elastomer to be tested according to the preloading control instructions, the main control module analyzes a corresponding test control instruction according to test control parameters and sends the test control instruction to the servo drive module, the servo drive module controls the output rod of the servo electric cylinder to synchronously drive the test execution mechanism to apply corresponding test actions to the elastomer to be tested according to the test control instruction, the acquisition module acquires real-time pressure information, real-time displacement information and test time domain information of the output rod of the servo electric cylinder in the test actions and sends the real-time pressure information, the real-time displacement information and the test time domain information to the upper computer, and the upper computer compares the performance test value of the elastomer to be tested with the evaluation parameters to obtain a performance test result of the elastomer to be tested after obtaining the performance test value of the elastomer to be tested according to the received real-time pressure information, real-time displacement information and test time domain information.
The pre-loading control command comprises the pre-loading carrying speed, the pre-loading mode, the pre-loading starting position, the pre-loading movement interval, the pre-loading target value and the pre-loading cycle period of the output rod of the servo electric cylinder, the test control instruction comprises a test loading mode, a test motion interval, a test running total period, a sine wave amplitude p and a target running frequency f, the main control module is provided with an electronic cam module, a sine wave operation analysis model is arranged in the electronic cam module, the sine wave operation analysis model is used for establishing a sine wave motion model in a two-dimensional coordinate axis comprising a Y axis and an X axis according to the test control command, the X axis is a virtual axis which always runs at a constant speed, the speed Vx running at the constant speed is 360 degrees X f, the Y-axis coordinate Y of the sine wave motion model and the X-axis coordinate X satisfy a relation function: y is p/2 × sin (x), wherein Y represents a target position value of an output rod of the servo electric cylinder, x represents a position on a virtual axis, an assignment range of x is 0 to 360 °, the electronic cam module is used for acquiring a Y-axis coordinate of each point on the sine wave motion model, a target speed of each point along a Y-axis direction and a target acceleration of each point along the Y-axis direction according to the value of x and sending the coordinates, the target speed of each point along the Y-axis direction and the target acceleration of each point along the Y-axis direction to the servo driving module, and the servo driving module is used for controlling the output rod of the servo electric cylinder to synchronously drive the test execution mechanism to apply corresponding test actions to the elastic body to be tested according to the received Y-axis coordinate of each point, the target speed of each point along the Y-axis direction and the target acceleration of each point along the Y-axis direction until the test. An electronic cam module and a sine wave operation analysis model are arranged in the main control module, so that the set target operation frequency and sine wave amplitude are converted into actual control parameters of an output rod of the servo electric cylinder, namely a target position, a target speed and a target acceleration, and the control is more accurate; the whole testing process is a dynamic testing process, actual data collected by the collecting module are calculated and processed by the upper computer, the obtained calculation result is more accurate, and the measurement of the performance of the elastic body to be tested can be effectively realized.
The pre-loading mode is a displacement loading mode, the pre-loading movement interval is a pre-loading displacement interval, the pre-loading target value is a pre-loading displacement target value, the testing loading mode is a displacement loading mode, and the testing movement interval is a testing displacement movement interval.
The pre-loading mode is a pressure loading mode, the pre-loading movement interval is a pre-loading pressure interval, the pre-loading target value is a pre-loading pressure target value, the testing loading mode is a pressure loading mode, and the testing movement interval is a testing pressure movement interval. The servo electric cylinder is controlled in a pressure loading mode, and the requirement on control precision can be well met.
The elastomer performance testing method using the elastomer performance testing equipment comprises the following steps of:
1): fixedly placing an elastomer to be tested on a test bench, and controlling an output rod of a servo electric cylinder to run to a set preloading initial position at a set preloading running speed by a main control module through a servo driving module;
2): the main control module controls an output rod of the servo electric cylinder to drive the test execution mechanism to apply a preloading action on the elastomer to be tested in a preloading motion interval according to a set preloading mode, until a set preloading cycle period is reached, the main control module controls the output rod of the servo electric cylinder to drive the test execution mechanism to run to a position corresponding to a set preloading target value at a set preloading running speed, and the position is used as a test starting point;
3): the servo driving module controls an output rod of the servo electric cylinder to synchronously drive a test executing mechanism to apply corresponding test actions to the elastomer to be tested in a set test motion interval from a test starting point according to the received Y-axis coordinate of each point on the sine wave motion model, the target speed of each point in the Y-axis direction and the target acceleration in the Y-axis direction, the test executing mechanism stops moving until the total test operation period is reached, and the acquisition module acquires real-time pressure information, real-time displacement information and test time domain information of the output rod of the servo electric cylinder in real time and transmits the real-time pressure information, the real-time displacement information and the test time domain information to the upper computer;
4): the upper computer performs filtering and intercepting according to the received real-time pressure information, real-time displacement information and test time domain information to obtain a displacement waveform and a pressure waveform on the same test time domain, Chinese window shaping and Fourier transform operation are performed on the displacement waveform and the pressure waveform on the same time domain through a data processing script module of an MATLAB tool to obtain dynamic rigidity Kd, a lag angle Phase and test running frequency f1 of the elastomer to be tested, and a damping coefficient C is obtained through the Kd, the Phase and the test running frequency f1, wherein C is Kd multiplied by sin (Phase multiplied by pi/180)/(2 multiplied by pi multiplied by f 1);
5): and the upper computer correspondingly compares Kd, phase and C with the set evaluation parameters to obtain a performance test result of the elastomer to be tested, and the test process is completed.
Compared with the prior art, the invention has the advantages that during testing, the upper computer sends the pre-loading control parameters and the test control parameters to the main control module, the main control module analyzes the corresponding pre-loading control instructions and the corresponding test control instructions and then sends the pre-loading control instructions and the test control instructions to the servo driving module, the servo driving module controls the output rod of the servo electric cylinder to synchronously drive the test executing mechanism to apply corresponding actions to the elastomer to be tested, the acquisition module acquires real-time data in the testing process and sends the real-time data to the upper computer, and the upper computer obtains the performance test value of the elastomer to be tested according to the received real-time data and then compares the performance test value of the elastomer to be tested with the evaluation parameters to obtain the performance test; the servo electric cylinder is adopted to drive the test execution mechanism to test the elastomer to be tested to obtain real-time pressure information, real-time displacement information and test time domain information, and the upper computer is used for obtaining a performance test value of the elastomer to be tested by adopting the existing mature data processing method, so that the equipment space is greatly reduced, and the on-line detection requirements of most elastomer products are met on the detection capability; the servo electric cylinder can greatly reduce the purchase cost and the equipment maintenance difficulty, and the control technology of the servo electric cylinder is mature, so that the technical support and the upgrading of a user are facilitated; the whole process is divided into a preloading process and a testing process, the influence of the stress of the elastomer to be tested on the test can be effectively eliminated through preloading, and the precision of the test result is improved.
Drawings
FIG. 1 is a schematic block diagram of the system architecture of the present invention.
Detailed Description
The invention is described in further detail below with reference to the accompanying examples.
The first embodiment is as follows: the utility model provides an elastomer performance test equipment, including being provided with the evaluation parameter, host computer 1 of preloading control parameter and test control parameter, main control module 2, servo drive module 3, servo electronic jar 4, test fixture and acquisition module 5, test fixture includes the testboard (not shown) that is used for placing the elastomer that awaits measuring and is used for the test actuating mechanism 6 of removal setting on the testboard of exerting pressure to the elastomer that awaits measuring, host computer 1 sends preloading control parameter and test control parameter to main control module 2, main control module 2 resolves corresponding preloading control instruction according to preloading control parameter and sends servo drive module 3, servo drive module 3 drives test actuating mechanism 6 to exert corresponding preloading action according to the output pole synchronization of preloading control instruction control servo electronic jar 4, main control module 2 resolves corresponding test control instruction according to test control parameter and sends servo drive The dynamic module 3, the servo driving module 3 controls the output rod of the servo electric cylinder 4 to synchronously drive the test executing mechanism 6 to apply corresponding test action to the elastomer to be tested according to the test control instruction, the acquisition module 5 acquires real-time pressure information, real-time displacement information and test time domain information of the output rod of the servo electric cylinder 4 in the test action and sends the real-time pressure information, the real-time displacement information and the test time domain information to the upper computer 1, the upper computer 1 obtains a performance test value of the elastomer to be tested according to the received real-time pressure information, the real-time displacement information and the test time domain information, and then compares the performance test value of the elastomer to be tested with the evaluation parameter to obtain a performance test result of the elastomer to be tested, wherein the preloading control instruction comprises the preloading carrying speed, the preloading mode, the preloading starting position, the preloading motion interval, the preloading, the test control instruction comprises a test loading mode, a test motion interval, a test operation total period, sine wave amplitude p and target operation frequency f, the main control module 2 is provided with an electronic cam module, a sine wave operation analysis model is arranged in the electronic cam module and used for establishing a sine wave motion model in a two-dimensional coordinate axis comprising a Y axis and an X axis according to the test control instruction, the X axis is a virtual axis which always runs at a constant speed, the speed Vx of the constant speed running is 360 multiplied by f, and the Y axis coordinate Y and the X axis coordinate X of the sine wave motion model satisfy a relation function: y is p/2 × sin (x), wherein Y represents a target position value of an output rod of the servo electric cylinder 4, x represents a position on a virtual axis, an assignment range of x is 0 to 360 °, the electronic cam module is used for obtaining a Y-axis coordinate of each point on the sine wave motion model, a target speed of each point along a Y-axis direction and a target acceleration along the Y-axis direction according to the value of x and sending the obtained values to the servo driving module 3, the servo driving module 3 is used for controlling the output rod of the servo electric cylinder 4 to synchronously drive the test executing mechanism 6 to apply corresponding test actions to the elastomer to be tested according to the received Y-axis coordinate of each point, the target speed of each point along the Y-axis direction and the target acceleration along the Y-axis direction, the test executing mechanism stops moving until a test running total period is reached, the preloading mode is a displacement loading mode, and the preloading movement interval is a preloading displacement interval, the pre-loading target value is a pre-loading displacement target value, the testing loading mode is a displacement loading mode, and the testing movement interval is a testing displacement movement interval. The test executing mechanism 6 comprises a guide post (not shown in the figure) arranged on the test bench and a press block (not shown in the figure) movably arranged on the guide post, and an output rod of the servo electric cylinder synchronously drives the press block to move up and down on the guide post to apply corresponding actions to the elastic body to be tested.
Example two: the other parts are the same as the first embodiment, and the difference is that the preloading mode is a pressure loading mode, the preloading movement interval is a preloading pressure interval, the preloading target value is a preloading pressure target value, the testing loading mode is a pressure loading mode, and the testing movement interval is a testing pressure movement interval.
Example three: the method for testing elastomer performance using the apparatus for testing elastomer performance of example one, comprising the steps of:
1): the method comprises the following steps that an elastic body to be tested is fixedly placed on a test bench, and a main control module 2 controls an output rod of a servo electric cylinder 4 to operate to a set preloading initial position at a set preloading operation speed through a servo driving module 3;
2): the main control module 2 controls an output rod of the servo electric cylinder 4 to drive the test execution mechanism 6 to apply a preloading action on the elastomer to be tested in a preloading motion interval according to a set preloading mode, until a set preloading cycle period is reached, the main control module 2 controls the output rod of the servo electric cylinder 4 to drive the test execution mechanism 6 to run to a position corresponding to a set preloading target value at a set preloading running speed, and the position is used as a test starting point;
3): the servo driving module 3 controls an output rod of the servo electric cylinder 4 to synchronously drive the test executing mechanism 6 to apply corresponding test actions to the elastomer to be tested in a set test motion interval from a test starting point according to the received Y-axis coordinate of each point on the sine wave motion model, the target speed of each point in the Y-axis direction and the target acceleration in the Y-axis direction, the test executing mechanism stops moving until the total test operation period is reached, and the acquisition module 5 acquires real-time pressure information, real-time displacement information and test time domain information of the output rod of the servo electric cylinder 4 in real time and sends the real-time pressure information, the real-time displacement information and the test time domain information to the upper computer;
4): the upper computer performs filtering and intercepting according to the received real-time pressure information, real-time displacement information and test time domain information to obtain a displacement waveform and a pressure waveform on the same test time domain, Chinese window shaping and Fourier transform operation are performed on a displacement-pressure waveform curve on the same time domain through a data processing script module of an MATLAB tool to obtain dynamic rigidity Kd, a lag angle Phase and test running frequency f1 of the elastomer to be tested, and a damping coefficient C is obtained through Kd, Phase and test running frequency f1, wherein C is Kd × sin (Phase × pi/180)/(2 × pi × f 1);
5): and the upper computer 1 correspondingly compares Kd, phase and C with the set evaluation parameters to obtain a performance test result of the elastomer to be tested, and the test process is finished.
Wherein, the step 4) is a data processing method in the existing conventional elastomer performance test process, and the detailed process is as follows: the upper computer analyzes the real-time pressure information, the real-time displacement information and the test time domain information of the output rod of the servo electric cylinder 4 collected by the receiving and collecting module, and the obtained synchronous signals comprise three array sequences with the same element number: the method comprises the following steps of carrying out low-pass filtering processing on first timestamp data, first position data and first pressure data once according to first timestamp data, first position data and first pressure data, and intercepting a certain data length according to a condition set by a program to obtain a new data sequence: the system comprises a first timestamp data, a first position data and a first pressure data, wherein the first timestamp data and the first position data are fitted into a position track curve of an output rod of a servo electric cylinder, the first timestamp data and the first pressure data are fitted into an output force track curve of the output rod of the servo electric cylinder, the upper computer calls a data processing script module of an MATLAB tool to further process the data, and the processing steps are as follows:
a. performing Fourier transform processing on the second timestamp data, the second position data and the second pressure data, and converting the time domain signal into a frequency domain signal to obtain a test motion frequency f 1;
b. processing the second timestamp data, the second position data and the second pressure data by adopting a Hanning window function to obtain a pressure waveform and a displacement waveform, obtaining a pressure amplitude F from the pressure waveform, obtaining a displacement amplitude S from the displacement waveform, and obtaining the dynamic stiffness Kd of the elastomer to be measured, wherein the Kd is F/S;
c. analyzing the pressure waveform and the displacement waveform on the same time domain to obtain a phase difference phase between the two waveforms, namely a lag angle; d. the damping coefficient C, C ═ Kd × sin (phase × pi/180)/(2 × pi × f1) of the product is obtained from the above data.
Claims (4)
1. An elastomer performance test device is characterized by comprising an upper computer, a main control module, a servo drive module, a servo electric cylinder, a test tool and an acquisition module, wherein the upper computer is provided with evaluation parameters, preloading control parameters and test control parameters, the test tool comprises a test bench for placing an elastomer to be tested and a test execution mechanism which is movably arranged on the test bench and used for applying pressure on the elastomer to be tested, the upper computer sends the preloading control parameters and the test control parameters to the main control module, the main control module analyzes corresponding preloading control instructions according to the preloading control parameters and sends the preloading control instructions to the servo drive module, the servo drive module controls an output rod of the servo electric cylinder to synchronously drive the test execution mechanism to apply corresponding preloading actions on the elastomer to be tested according to the preloading control instructions, the main control module analyzes a corresponding test control instruction according to test control parameters and sends the test control instruction to the servo drive module, the servo drive module controls the output rod of the servo electric cylinder to synchronously drive the test execution mechanism to apply corresponding test actions to the elastomer to be tested according to the test control instruction, the acquisition module acquires real-time pressure information, real-time displacement information and test time domain information of the output rod of the servo electric cylinder in the test actions and sends the real-time pressure information, the real-time displacement information and the test time domain information to the upper computer, the upper computer obtains a performance test value of the elastomer to be tested according to the received real-time pressure information, real-time displacement information and test time domain information and then compares the performance test value of the elastomer to be tested with the evaluation parameters to obtain a performance test result of the elastomer to be tested, and the pre-loading control instruction comprises pre-loading speed of the output rod of the servo electric cylinder, The system comprises a preloading mode, a preloading starting position, a preloading motion interval, a preloading target value and a preloading cycle period, wherein a test control command comprises a test loading mode, a test motion interval, a test running total period, a sine wave amplitude p and a target running frequency f, an electronic cam module is arranged on a main control module, a sine wave operation analysis model is arranged in the electronic cam module, the sine wave operation analysis model is used for establishing a sine wave motion model in a two-dimensional coordinate axis comprising a Y axis and an X axis according to the test control command, the X axis is a virtual axis which runs at a constant speed all the time, the constant speed Vx which runs at a constant speed is 360 degrees multiplied by f, and a Y axis coordinate Y of the sine wave motion model and an X axis coordinate X meet a relation function: y is p/2 × sin (x), wherein Y represents a target position value of an output rod of the servo electric cylinder, x represents a position on a virtual axis, an assignment range of x is 0 to 360 °, the electronic cam module is used for acquiring a Y-axis coordinate of each point on the sine wave motion model, a target speed of each point along a Y-axis direction and a target acceleration of each point along the Y-axis direction according to the value of x and sending the coordinates, the target speed of each point along the Y-axis direction and the target acceleration of each point along the Y-axis direction to the servo driving module, and the servo driving module is used for controlling the output rod of the servo electric cylinder to synchronously drive the test execution mechanism to apply corresponding test actions to the elastic body to be tested according to the received Y-axis coordinate of each point, the target speed of each point along the Y-axis direction and the target acceleration of each point along the Y-axis direction until the test.
2. The apparatus of claim 1, wherein the pre-loading manner is a displacement loading manner, the pre-loading movement interval is a pre-loading displacement interval, the pre-loading target value is a pre-loading displacement target value, the testing loading manner is a displacement loading manner, and the testing movement interval is a testing displacement movement interval.
3. An elastomer performance test device according to claim 1, wherein the preloading mode is a pressure loading mode, the preloading movement interval is a preloading pressure interval, the preloading target value is a preloading pressure target value, the test loading mode is a pressure loading mode, and the test movement interval is a test pressure movement interval.
4. An elastomer property test method using the elastomer property test apparatus according to claim 1, characterized by comprising the steps of:
1): fixedly placing an elastomer to be tested on a test bench, and controlling an output rod of a servo electric cylinder to run to a set preloading initial position at a set preloading running speed by a main control module through a servo driving module;
2): the main control module controls an output rod of the servo electric cylinder to drive the test execution mechanism to apply a preloading action on the elastomer to be tested in a preloading motion interval according to a set preloading mode, until a set preloading cycle period is reached, the main control module controls the output rod of the servo electric cylinder to drive the test execution mechanism to run to a position corresponding to a set preloading target value at a set preloading running speed, and the position is used as a test starting point;
3): the servo driving module controls an output rod of the servo electric cylinder to synchronously drive a test executing mechanism to apply corresponding test actions to the elastomer to be tested in a set test motion interval from a test starting point according to the received Y-axis coordinate of each point on the sine wave motion model, the target speed of each point in the Y-axis direction and the target acceleration in the Y-axis direction, the test executing mechanism stops moving until the total test operation period is reached, and the acquisition module acquires real-time pressure information, real-time displacement information and test time domain information of the output rod of the servo electric cylinder in real time and transmits the real-time pressure information, the real-time displacement information and the test time domain information to the upper computer;
4): the upper computer performs filtering and intercepting according to the received real-time pressure information, real-time displacement information and test time domain information to obtain a displacement waveform and a pressure waveform on the same test time domain, Chinese window shaping and Fourier transform operation are performed on the displacement waveform and the pressure waveform on the same time domain through a data processing script module of an MATLAB tool to obtain dynamic rigidity Kd, a lag angle Phase and test running frequency f1 of the elastomer to be tested, and a damping coefficient C is obtained through the Kd, the Phase and the test running frequency f1, wherein C is Kd multiplied by sin (Phase multiplied by pi/180)/(2 multiplied by pi multiplied by f 1);
5): and the upper computer correspondingly compares Kd, phase and C with the set evaluation parameters to obtain a performance test result of the elastomer to be tested, and the test process is completed.
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| JP5875265B2 (en) * | 2011-07-04 | 2016-03-02 | キヤノン株式会社 | Stepping motor drive control device, drive control method, drive control system, and optical apparatus |
| CN103076756A (en) * | 2011-10-25 | 2013-05-01 | 科比传动技术（上海）有限公司 | Method for realizing electronic cam function of servo driver |
| CN103163822B (en) * | 2011-12-19 | 2015-09-16 | 苏州汇川技术有限公司 | electronic cam control device and method |
| CN104535313A (en) * | 2014-12-26 | 2015-04-22 | 建新赵氏集团有限公司 | Hydraulic suspension dynamic rapid testing tool |
| CN105784347B (en) * | 2016-04-21 | 2018-06-29 | 同济大学 | A kind of helical spring dynamical property test system and test method |
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2019
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