CN115628965A - Automatic testing system and method for mechanical property of composite material - Google Patents
Automatic testing system and method for mechanical property of composite material Download PDFInfo
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- CN115628965A CN115628965A CN202211214484.0A CN202211214484A CN115628965A CN 115628965 A CN115628965 A CN 115628965A CN 202211214484 A CN202211214484 A CN 202211214484A CN 115628965 A CN115628965 A CN 115628965A
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- G—PHYSICS
- G01—MEASURING; TESTING
- 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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
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Abstract
The invention discloses an automatic testing system and method for mechanical properties of a composite material, wherein the system comprises a sample placing unit, a size measuring unit, a sample transferring unit, a mechanical testing unit, a strain measuring unit and a data acquisition system; the dimension measuring unit is used for measuring the external dimension of the sample; the mechanical testing unit is used for carrying out mechanical testing on the sample and acquiring load data, displacement data and temperature and humidity data in the mechanical testing process of the sample; the strain measurement unit comprises a strain gauge; the sample transfer unit is used for directionally transferring the sample between the sample placing unit and the size measuring unit through the mechanical testing unit; the data acquisition system is used for acquiring data of the size measurement unit, the mechanical test unit and the strain measurement unit. The invention can carry out batch automatic mechanical property detection on the composite material, and improves the mechanical property detection efficiency and accuracy of the composite material.
Description
Technical Field
The invention relates to the technical field of mechanical property detection, in particular to an automatic testing system and method for mechanical property of a composite material.
Background
The mechanical property test of the composite material is a main method for evaluating the comprehensive performance of the composite material at present. Due to the characteristics of anisotropy of a composite material sample, complexity of a composite material forming process and the like, the precision of sample size measurement, the centering property of sample clamping, the measurement of strain test data and the judgment of a failure mode in the test process are particularly important, and the accuracy of a test result is directly determined. In the current tests of mechanical properties of composite materials, such as static force, fatigue and the like, the following procedures are mainly adopted: 1. preparation of test pieces: including environmental treatment, the pasting of sample label, 2, the artifical transportation of test piece, 3, the size of artifical measurement test piece, 4, artifical for measuring the meeting an emergency of test piece in the experimentation and pasting foil gage or installation contact extensometer or use the video extensometer on the test piece, 5, artifical installation test piece and keeping its centering nature in the testing machine, 6, the anchor clamps of testing machine press from both sides tight test piece, 7, the testing machine accomplishes the experiment according to the test procedure that sets for, 8, the artifical sample of taking off after loosening anchor clamps, 9, the artifical validity of judging the test piece according to the failure mode, 10, artifical according to test data output test result and analysis, 11, artifical categorised recovery test piece. In the prior art, most of the procedures are manually implemented, which may cause invalid test results due to human careless omission of unconfirmed test pieces, dimension measurement errors, test piece misalignment, strain gauge pasting deflection, data input and output errors and the like in the test process, thereby causing low detection efficiency.
Disclosure of Invention
The invention provides an automatic testing system and method for mechanical properties of a composite material, which have the advantages that the mechanical properties of the composite material can be automatically detected in batches, the detection efficiency and accuracy of the mechanical properties of the composite material are improved, the efficiency can be effectively improved during batch detection, and the labor input can be reduced.
The technical scheme of the invention is as follows:
an automatic testing system for mechanical properties of a composite material is characterized by comprising a sample placing unit, a size measuring unit, a sample transferring unit, a mechanical testing unit, a strain measuring unit and a data acquisition system;
the sample placing unit comprises a sample rack or a sample tray, and a plurality of placing bins for placing samples are arranged on the sample rack;
the dimension measuring unit is used for measuring the external dimension of the sample;
the mechanical testing unit is used for carrying out mechanical testing on the sample and acquiring load data, displacement data and temperature and humidity data in the mechanical testing process of the sample;
the strain measurement unit comprises a strain gauge, and the strain gauge is used for acquiring and outputting strain data in the mechanical test process of the sample, and is a strain gauge, an automatic extensometer or a video extensometer;
the sample transfer unit is used for directionally transferring the sample between the sample placing unit and the size measuring unit and between the mechanical testing units;
the data acquisition system is used for acquiring data of the size measurement unit, the mechanical test unit and the strain measurement unit.
The device further comprises an acquisition control unit, wherein the acquisition control unit is used for controlling the data acquisition type and the data acquisition frequency of the mechanical test unit and the strain measurement unit, and the parameters of the acquisition control unit are distributed by a data acquisition system.
Furthermore, sample marks which correspond to the samples one by one are arranged on the samples, and the sample marks are in the form of bar codes or two-dimensional codes.
Further, the size measuring unit comprises a first code identification device and a sample size measuring device, the first code identification device is used for identifying sample codes on the samples, and the sample size measuring device comprises a contact type outline measuring instrument and/or a laser measuring instrument.
Further, the mechanical testing unit comprises a mechanical testing machine, a force sensor, a displacement sensor and a temperature and humidity controller, the mechanical testing machine is one of an electronic universal testing machine, a hydraulic tension machine and a fatigue testing machine, and the temperature and humidity controller is used for controlling the temperature and humidity of the testing environment and detecting the temperature and humidity data of the testing environment.
Furthermore, the sample transfer unit comprises a mechanical arm, a second code identification device and a clamping jaw are arranged on the mechanical arm, the second code identification device is used for identifying sample codes on the samples, and the clamping jaw is used for clamping the samples.
Further, still include the locating unit that samples on, the locating unit that samples on includes mechanical positioner or coordinate positioning device, mechanical positioner is including setting up the mechanical limiting plate in the mechanics test unit, coordinate positioning device includes a second vision camera that sets up on the arm.
Further, still include useless appearance recovery unit, useless appearance recovery unit includes third mark code recognition device, destruction mode identification module and sample collection device, destruction mode identification module includes a first vision camera that is used for shooing the sample, sample collection device includes at least one baling press for collect the sample after the test.
An automatic testing method for mechanical properties of a composite material is characterized in that the automatic testing system for mechanical properties of the composite material is applied for testing, and comprises the following steps:
(1) And (3) processing the tested composite material sample before mechanical testing:
a, a size measuring unit identifies a sample code and measures the size, and code data and size measuring data are input into a data acquisition system;
b, transferring the sample from the size measuring unit to a sample placing unit by a sample transferring unit for code reading;
c, the sample transfer unit takes out the sample from the sample placing unit, and the sample is accurately placed on the testing position of the mechanical testing unit under the guidance of the sample loading and positioning unit;
(2) The mechanical testing unit, the acquisition control unit, the data acquisition system and the data processing system automatically configure relevant parameters according to the code reading information of the sample;
(3) Starting a test, and collecting, analyzing and storing related data:
starting a data acquisition system, acquiring test data and storing the data;
starting the mechanical testing machine to start testing;
c, the acquisition control unit controls the acquisition of the load value, the displacement value and the strain data at the current moment in real time, carries out serialization, and finally transmits the data to the data acquisition system, and the data processing system carries out analysis processing on the data of the data acquisition system and issues a report;
(4) And after the test is finished, stopping data acquisition and storage, exporting experimental data and reports, enabling the sample to enter a waste sample recovery unit, and after the mark code and the damage mode of the sample are identified, classifying and recovering the sample.
In conclusion, the beneficial effects of the invention are as follows:
1. according to the automatic testing system for the mechanical property of the composite material, manual operation is replaced by the size measuring unit, the sample transferring unit, the sample loading positioning unit, the strain measuring unit and the waste sample recycling unit, so that the testing precision and accuracy are improved, and the testing speed is accelerated by automation;
2. in the size measuring unit, the sample transferring unit and the waste sample recovering unit, sample marks on a sample can be identified, the correspondence between the sample and test data is ensured, the artificial careless omission is avoided, and the reliability of the test data is improved;
3. according to the invention, the sample can be quickly and accurately placed in the test position through the sample loading positioning unit.
Drawings
FIG. 1 is a schematic structural diagram of an automated testing system for mechanical properties of composite materials in the present invention;
FIG. 2 is a schematic view of a dimensional measurement device of the present invention;
FIG. 3 is a functional structure diagram of the placement unit of the present invention;
FIG. 4 is a schematic diagram of the functional structure of the sample transfer unit according to the present invention;
FIG. 5 is a functional structure diagram of a sample loading positioning unit, a mechanical testing unit and a strain acquisition unit in the invention;
FIG. 6 is a flow chart of the automated mechanical property testing method for the composite material according to the present invention.
In the figure, 1, a size measuring unit; 2. a sample placing unit; 3. a sample transfer unit; 31. a clamping jaw; 4. a sample loading positioning unit; 5. a mechanical testing unit; 6. a strain measuring unit; 7. and a waste sample recovery unit.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings.
The first embodiment is as follows: referring to fig. 1-5, an automatic testing system for mechanical properties of a composite material includes a sample placing unit 2, a size measuring unit 1, a sample transferring unit 3, a mechanical testing unit 5, a strain measuring unit 6 and a data collecting system.
The sample placing unit 2 comprises a sample rack or a sample tray, and a plurality of placing bins for placing samples are arranged on the sample rack. The sample rack or tray is selected according to the particular type of sample to be tested. The placing bin on the sample rack can place the samples at specific positions in sequence, subsequent samples are convenient to transfer, and the sample rack is always placed at a fixed position during testing. The sample tray can be used for placing composite material samples with different shapes according to the requirements of different mechanical test standards, and is usually used for placing samples which cannot be placed on a sample rack.
The sample is provided with sample marks which correspond to the samples one by one, and the sample marks are in the form of bar codes or two-dimensional codes. The sample code is used to identify and distinguish the sample.
The dimension measuring unit 1 is used for measuring the external dimension of the sample; the dimension measuring unit 1 comprises a first code identification device and a sample dimension measuring device, the first code identification device is used for identifying sample codes on samples, and the sample dimension measuring device comprises a contact type outline measuring instrument and/or a laser measuring instrument. Taking a laser measuring instrument as an example, the laser measuring instrument measures the overall dimensions of a sample by an optical measuring method, wherein the overall dimensions comprise the dimensions such as length, width, thickness, slotting depth, hole diameter and the like, and dimension data are transmitted to a data acquisition system.
The mechanical testing unit 5 is used for performing mechanical testing on the sample and collecting load data, displacement data and temperature and humidity data in the mechanical testing process of the sample; the mechanical testing unit 5 comprises a mechanical testing machine, a force sensor, a displacement sensor and a temperature and humidity controller, the mechanical testing machine is one of an electronic universal testing machine, a hydraulic tensile machine and a fatigue testing machine, and the temperature and humidity controller is used for controlling the temperature and humidity of a testing environment and detecting the temperature and humidity data of the testing environment. The temperature and humidity controller can adjust the temperature and humidity of the environment through the heater and the fan, so that the temperature and humidity of the test environment can be adjusted to the environment required by the test according to the test requirement of the sample.
Loading the centered composite material sample clamped in the mechanical experiment machine according to a preset load mode; the force sensor is used for accurately recording loading data of the mechanical experiment machine and loading data of the composite material sample; the displacement sensor is used for accurately recording displacement data of the composite material sample, and the load data, the displacement data and the temperature and humidity data are transmitted to the data acquisition system in real time.
The strain measurement unit 6 comprises a strain gauge for acquiring and outputting strain data in the mechanical test process of the sample, and the strain gauge is a strain gauge, an automatic extensometer or a video extensometer. Taking a video extensometer as an example, the video extensometer measures strain data of a sample during a mechanical test in a video recording deformation mode, and the strain data is transmitted to a data acquisition system in real time.
The sample transfer unit 3 is used for directionally transferring the sample between the sample placing unit 2 and the size measuring unit 1 and the mechanical testing unit 5; the sample transfer unit 3 comprises a mechanical arm, a second code recognition device and a clamping jaw 31 are arranged on the mechanical arm, the second code recognition device is used for recognizing sample codes on samples, and the clamping jaw 31 is used for clamping samples. And the sample code data read by the second code identification device is transmitted to the data acquisition system.
Still including the locating element 4 that samples, the locating element 4 that samples includes mechanical positioner or coordinate positioning device, mechanical positioner is including setting up the mechanical limiting plate in mechanics test unit 5, and this mechanical limiting plate setting satisfies in the anchor clamps of mechanics test unit 5 (with mechanics testing machine position) on the mechanical limiting plate position: when the sample collides with the mechanical limiting plate, the sample is positioned in the center of the clamp. The coordinate positioning device comprises a second vision camera arranged on the mechanical arm, the second vision camera is used for collecting the position of the clamp in the mechanical testing unit 5 (the position of the mechanical testing machine) and analyzing the coordinate of the clamp, and data are fed back to the mechanical arm, so that the mechanical arm can accurately place a sample in the center of the clamp.
The data acquisition system is used for acquiring data of the size measuring unit 1, the mechanical testing unit 5 and the strain measuring unit 6. The device also comprises an acquisition control unit, wherein the acquisition control unit is used for controlling the data acquisition type and the data acquisition frequency of the mechanical test unit 5 and the strain measurement unit 6, and the parameters of the acquisition control unit are distributed by a data acquisition system.
Still include useless appearance recovery unit 7, useless appearance recovery unit 7 includes third mark code recognition device, destruction mode identification module and sample collection device, destruction mode identification module includes a first vision camera that is used for shooing the sample, and first vision camera can be in the same place with the video extensometer is integrated, and first vision camera is through the destruction mode of the image acquisition sample of analysis test back sample. The sample collection device comprises at least one packing machine and is used for collecting the tested samples and classifying and recycling the samples according to different damage modes of the samples.
Example two: referring to fig. 6, an automatic testing method for mechanical properties of a composite material, which is performed by using the automatic testing system for mechanical properties of a composite material in the first embodiment, includes the following steps:
(1) And (3) processing the tested composite material sample before mechanical testing:
a, a size measuring unit identifies a sample code and measures the size, and code data and size measuring data are input into a data acquisition system;
b, the sample transfer unit transfers the sample from the size measuring unit to the sample placing unit for code reading;
c, the sample transfer unit takes out the sample from the sample placing unit, and the sample is accurately placed on the testing position of the mechanical testing unit under the guidance of the sample loading and positioning unit;
(2) The mechanical testing unit, the acquisition control unit, the data acquisition system and the data processing system automatically configure relevant parameters according to the code reading information of the sample;
(3) Starting a test, and collecting, analyzing and storing related data:
starting a data acquisition system, acquiring test data and storing the data;
starting the mechanical testing machine to start testing;
c, the acquisition control unit controls the acquisition of the load value, the displacement value and the strain data at the current moment in real time, carries out serialization, and finally transmits the data to the data acquisition system, and the data processing system carries out analysis processing on the data of the data acquisition system and issues a report;
(4) And after the test is finished, stopping data acquisition and storage, exporting experimental data and reports, enabling the sample to enter a waste sample recovery unit, and after the mark code and the damage mode of the sample are identified, classifying and recovering the sample.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, it is possible to make various changes and modifications without departing from the inventive concept, and these changes and modifications are all within the scope of the present invention.
Claims (9)
1. An automatic testing system for mechanical properties of a composite material is characterized by comprising a sample placing unit, a size measuring unit, a sample transferring unit, a mechanical testing unit, a strain measuring unit and a data acquisition system;
the sample placing unit comprises a sample rack or a sample plate, and a plurality of placing bins for placing samples are arranged on the sample rack;
the dimension measuring unit is used for measuring the external dimension of the sample;
the mechanical testing unit is used for carrying out mechanical testing on the sample and collecting load data, displacement data and temperature and humidity data in the mechanical testing process of the sample;
the strain measurement unit comprises a strain gauge, the strain gauge is used for collecting and outputting strain data in the mechanical test process of the sample, and the strain gauge is a strain gauge, an automatic extensometer or a video extensometer;
the sample transfer unit is used for directionally transferring the sample between the sample placing unit and the size measuring unit through the mechanical testing unit;
the data acquisition system is used for acquiring data of the size measurement unit, the mechanical test unit and the strain measurement unit.
2. The automatic testing system for mechanical properties of composite materials according to claim 1, further comprising an acquisition control unit, wherein the acquisition control unit is used for controlling data acquisition types and data acquisition frequencies of the mechanical testing unit and the strain measuring unit, and parameters of the acquisition control unit are distributed by the data acquisition system.
3. The automatic test system for the mechanical property of the composite material according to claim 2, wherein sample marks corresponding to the samples in a one-to-one mode are arranged on the samples, and the sample marks are in the form of bar codes or two-dimensional codes.
4. The automatic testing system for mechanical properties of composite materials according to claim 3, wherein the dimension measuring unit comprises a first code recognition device and a sample dimension measuring device, the first code recognition device is used for recognizing sample codes on the sample, and the sample dimension measuring device comprises a contact type outline measuring instrument and/or a laser measuring instrument.
5. The automatic test system for the mechanical property of the composite material according to claim 4, wherein the mechanical test unit comprises a mechanical test machine, a force sensor, a displacement sensor and a temperature and humidity controller, the mechanical test machine is one of an electronic universal test machine, a hydraulic tensile machine and a fatigue test machine, and the temperature and humidity controller is used for controlling the temperature and humidity of a test environment and detecting temperature and humidity data of the test environment.
6. The automatic test system for mechanical properties of composite materials according to claim 5, wherein the sample transfer unit comprises a mechanical arm, the mechanical arm is provided with a second code recognition device and a clamping jaw, the second code recognition device is used for recognizing the sample code on the sample, and the clamping jaw is used for clamping the sample.
7. The automatic test system for mechanical properties of composite materials according to claim 6, further comprising a sample positioning unit, wherein the sample positioning unit comprises a mechanical positioning device or a coordinate positioning device, the mechanical positioning device comprises a mechanical limiting plate disposed in the mechanical test unit, and the coordinate positioning device comprises a second vision camera disposed on the mechanical arm.
8. The automated testing system for mechanical properties of composite materials according to claim 7, further comprising a waste sample recovery unit, wherein the waste sample recovery unit comprises a third code recognition device, a failure mode recognition module and a sample collection device, the failure mode recognition module comprises a first visual camera for shooting a sample, and the sample collection device comprises at least one packing machine for collecting the tested sample.
9. An automatic testing method for mechanical properties of composite materials, which is characterized in that the automatic testing system for mechanical properties of composite materials as claimed in claim 8 is used for testing, and comprises the following steps:
(1) And (3) processing the tested composite material sample before mechanical testing:
a, a size measuring unit identifies a sample code and measures the size, and code data and size measuring data are input into a data acquisition system;
b, transferring the sample from the size measuring unit to a sample placing unit by a sample transferring unit for code reading;
c, the sample transfer unit takes out the sample from the sample placing unit, and the sample is accurately placed on the testing position of the mechanical testing unit under the guidance of the sample loading and positioning unit;
(2) The mechanical testing unit, the acquisition control unit, the data acquisition system and the data processing system automatically configure relevant parameters according to the code reading information of the sample;
(3) Starting a test, and collecting, analyzing and storing related data:
starting a data acquisition system, acquiring test data and storing the data;
starting the mechanical testing machine to start testing;
c, the acquisition control unit controls the acquisition of the load value, the displacement value and the strain data at the current moment in real time, carries out serialization, and finally transmits the data to the data acquisition system, and the data processing system carries out analysis processing on the data of the data acquisition system and issues a report;
(4) And after the test is finished, stopping data acquisition and storage, exporting experimental data and reports, enabling the sample to enter a waste sample recovery unit, and after the mark code and the damage mode of the sample are identified, classifying and recovering the sample.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211214484.0A CN115628965A (en) | 2022-09-30 | 2022-09-30 | Automatic testing system and method for mechanical property of composite material |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211214484.0A CN115628965A (en) | 2022-09-30 | 2022-09-30 | Automatic testing system and method for mechanical property of composite material |
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| CN115628965A true CN115628965A (en) | 2023-01-20 |
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| CN202211214484.0A Pending CN115628965A (en) | 2022-09-30 | 2022-09-30 | Automatic testing system and method for mechanical property of composite material |
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Effective date of registration: 20230119 Address after: 210000 No.30, Andeli, Yuhuatai District, Nanjing City, Jiangsu Province Applicant after: NANJING FIBERGLASS RESEARCH & DESIGN INSTITUTE Co.,Ltd. Applicant after: China Building Materials Group Co.,Ltd. Address before: 210000 No.30, Andeli, Yuhuatai District, Nanjing City, Jiangsu Province Applicant before: NANJING FIBERGLASS RESEARCH & DESIGN INSTITUTE Co.,Ltd. |
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